feat(xo-server-transport-email): 0.3.3

nodemailer 2.7.0 breaks Node 4 compatibility

.editorconfig

@@ -11,7 +11,7 @@ root = true
 charset = utf-8
 end_of_line = lf
 insert_final_newline = true
-trim_trailing_whitespaces = true
+trim_trailing_whitespace = true
 
 # CoffeeScript
 #
@@ -28,12 +28,12 @@ indent_style = space
 # Package.json
 #
 # This indentation style is the one used by npm.
-[/package.json]
+[package.json]
 indent_size = 2
 indent_style = space
 
-# Jade
-[*.jade]
+# Pug (Jade)
+[*.{jade,pug}]
 indent_size = 2
 indent_style = space
 
@@ -41,7 +41,7 @@ indent_style = space
 #
 # Two spaces seems to be the standard most common style, at least in
 # Node.js (http://nodeguide.com/style.html#tabs-vs-spaces).
-[*.js]
+[*.{js,jsx,ts,tsx}]
 indent_size = 2
 indent_style = space
 

.gitignore

@@ -0,0 +1,13 @@
+/node_modules/
+/lerna-debug.log
+/lerna-debug.log.*
+
+/packages/*/dist/
+/packages/*/node_modules/
+
+npm-debug.log
+npm-debug.log.*
+pnpm-debug.log
+pnpm-debug.log.*
+yarn-error.log
+yarn-error.log.*

.travis.yml

@@ -1,9 +1,8 @@
 language: node_js
 node_js:
-  - 'stable'
-  - '4'
-  - '0.12'
-  - '0.10'
+  - stable
+  - 6
+  - 4
 
 # Use containers.
 # http://docs.travis-ci.com/user/workers/container-based-infrastructure/

README.md

@@ -0,0 +1,5 @@
+Almost all dev for Xen Orchestra is happening in this repository.
+
+Because transition is still underway, [xo-web](https://github.com/vatesfr/xo-web) and [xo-server](https://github.com/vatesfr/xo-server) are still developped in their own repositories.
+
+For now, all issues are still to be reported in [xo-web's tracker](https://github.com/vatesfr/xo-web/issues).

lerna.json

@@ -0,0 +1,7 @@
+{
+  "lerna": "2.0.0-beta.34",
+  "packages": [
+    "packages/*"
+  ],
+  "version": "0.0.0"
+}

package.json

@@ -0,0 +1,12 @@
+{
+  "devDependencies": {
+    "husky": "^0.13.1",
+    "lerna": "^2.0.0-beta.34",
+    "promise-toolbox": "^0.8.0"
+  },
+  "scripts": {
+    "commit-msg": "yarn test",
+    "install": "lerna exec --concurrency 1 -- yarn",
+    "test": "lerna exec -- yarn test"
+  }
+}

packages/vhd-cli/.npmignore

@@ -0,0 +1,24 @@
+/benchmark/
+/benchmarks/
+*.bench.js
+*.bench.js.map
+
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/fixture/
+/fixtures/
+*.fixture.js
+*.fixture.js.map
+*.fixtures.js
+*.fixtures.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map
+
+__snapshots__/

packages/vhd-cli/README.md

@@ -0,0 +1,51 @@
+# vhd-cli [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> ${pkg.description}
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/vhd-cli):
+
+```
+> npm install --global vhd-cli
+```
+
+## Usage
+
+```
+> vhd-cli <VHD file>
+```
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+ISC © [Vates SAS](https://vates.fr)

packages/vhd-cli/package.json

@@ -0,0 +1,87 @@
+{
+  "name": "vhd-cli",
+  "version": "0.0.0",
+  "license": "ISC",
+  "description": "",
+  "keywords": [],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/vhd-cli",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@isonoe.net"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {
+    "vhd-cli": "dist/index.js"
+  },
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "@nraynaud/struct-fu": "^1.0.1",
+    "@nraynaud/xo-fs": "^0.0.5",
+    "babel-runtime": "^6.22.0",
+    "exec-promise": "^0.6.1"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.22.2",
+    "babel-eslint": "^7.1.1",
+    "babel-plugin-lodash": "^3.2.11",
+    "babel-plugin-transform-runtime": "^6.22.0",
+    "babel-preset-env": "^1.1.8",
+    "babel-preset-stage-3": "^6.22.0",
+    "cross-env": "^3.1.4",
+    "dependency-check": "^2.8.0",
+    "jest": "^18.1.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.6.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "commitmsg": "npm test",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "dev-test": "jest --bail --watch",
+    "posttest": "standard && dependency-check ./package.json",
+    "prebuild": "rimraf dist/",
+    "predev": "npm run prebuild",
+    "prepublish": "npm run build",
+    "test": "jest"
+  },
+  "babel": {
+    "plugins": [
+      "lodash",
+      "transform-runtime"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "node": 4
+          }
+        }
+      ],
+      "stage-3"
+    ]
+  },
+  "jest": {
+    "testPathDirs": [
+      "<rootDir>/src"
+    ],
+    "testRegex": "\\.spec\\.js$"
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/vhd-cli/src/index.js

@@ -0,0 +1,19 @@
+#!/usr/bin/env node
+
+import execPromise from 'exec-promise'
+import { RemoteHandlerLocal } from '@nraynaud/xo-fs'
+import { resolve } from 'path'
+
+import Vhd from './vhd'
+
+execPromise(async args => {
+  const vhd = new Vhd(
+    new RemoteHandlerLocal({ url: 'file:///' }),
+    resolve(args[0])
+  )
+
+  await vhd.readHeaderAndFooter()
+
+  console.log(vhd._header)
+  console.log(vhd._footer)
+})

packages/vhd-cli/src/vhd.js

@@ -0,0 +1,441 @@
+import assert from 'assert'
+import fu from '@nraynaud/struct-fu'
+import { dirname } from 'path'
+
+// ===================================================================
+//
+// Spec:
+// https://www.microsoft.com/en-us/download/details.aspx?id=23850
+//
+// C implementation:
+// https://github.com/rubiojr/vhd-util-convert
+//
+// ===================================================================
+
+/* eslint-disable no-unused-vars */
+
+const HARD_DISK_TYPE_DIFFERENCING = 4
+const HARD_DISK_TYPE_DYNAMIC = 3
+const HARD_DISK_TYPE_FIXED = 2
+const PLATFORM_CODE_NONE = 0
+export const SECTOR_SIZE = 512
+
+/* eslint-enable no-unused vars */
+
+// ===================================================================
+
+const fuFooter = fu.struct([
+  fu.char('cookie', 8), // 0
+  fu.uint32('features'), // 8
+  fu.uint32('fileFormatVersion'), // 12
+  fu.struct('dataOffset', [
+    fu.uint32('high'), // 16
+    fu.uint32('low') // 20
+  ]),
+  fu.uint32('timestamp'), // 24
+  fu.char('creatorApplication', 4), // 28
+  fu.uint32('creatorVersion'), // 32
+  fu.uint32('creatorHostOs'), // 36
+  fu.struct('originalSize', [ // At the creation, current size of the hard disk.
+    fu.uint32('high'), // 40
+    fu.uint32('low') // 44
+  ]),
+  fu.struct('currentSize', [ // Current size of the virtual disk. At the creation: currentSize = originalSize.
+    fu.uint32('high'), // 48
+    fu.uint32('low') // 52
+  ]),
+  fu.struct('diskGeometry', [
+    fu.uint16('cylinders'), // 56
+    fu.uint8('heads'), // 58
+    fu.uint8('sectorsPerTrackCylinder') // 59
+  ]),
+  fu.uint32('diskType'), // 60 Disk type, must be equal to HARD_DISK_TYPE_DYNAMIC/HARD_DISK_TYPE_DIFFERENCING.
+  fu.uint32('checksum'), // 64
+  fu.uint8('uuid', 16), // 68
+  fu.char('saved'), // 84
+  fu.char('hidden'), // 85
+  fu.byte('reserved', 426) // 86
+])
+const FOOTER_SIZE = fuFooter.size
+
+const fuHeader = fu.struct([
+  fu.char('cookie', 8),
+  fu.struct('dataOffset', [
+    fu.uint32('high'),
+    fu.uint32('low')
+  ]),
+  fu.struct('tableOffset', [ // Absolute byte offset of the Block Allocation Table.
+    fu.uint32('high'),
+    fu.uint32('low')
+  ]),
+  fu.uint32('headerVersion'),
+  fu.uint32('maxTableEntries'), // Max entries in the Block Allocation Table.
+  fu.uint32('blockSize'), // Block size (without bitmap) in bytes.
+  fu.uint32('checksum'),
+  fu.uint8('parentUuid', 16),
+  fu.uint32('parentTimestamp'),
+  fu.byte('reserved1', 4),
+  fu.char16be('parentUnicodeName', 512),
+  fu.struct('parentLocatorEntry', [
+    fu.uint32('platformCode'),
+    fu.uint32('platformDataSpace'),
+    fu.uint32('platformDataLength'),
+    fu.uint32('reserved'),
+    fu.struct('platformDataOffset', [ // Absolute byte offset of the locator data.
+      fu.uint32('high'),
+      fu.uint32('low')
+    ])
+  ], 8),
+  fu.byte('reserved2', 256)
+])
+const HEADER_SIZE = fuHeader.size
+
+// ===================================================================
+// Helpers
+// ===================================================================
+
+const SIZE_OF_32_BITS = Math.pow(2, 32)
+const uint32ToUint64 = fu => fu.high * SIZE_OF_32_BITS + fu.low
+
+// Returns a 32 bits integer corresponding to a Vhd version.
+const getVhdVersion = (major, minor) => (major << 16) | (minor & 0x0000FFFF)
+
+// bytes[] bit manipulation
+const testBit = (map, bit) => map[bit >> 3] & 1 << (bit & 7)
+const setBit = (map, bit) => {
+  map[bit >> 3] |= 1 << (bit & 7)
+}
+const unsetBit = (map, bit) => {
+  map[bit >> 3] &= ~(1 << (bit & 7))
+}
+
+const addOffsets = (...offsets) => offsets.reduce(
+  (a, b) => b == null
+    ? a
+    : typeof b === 'object'
+      ? { bytes: a.bytes + b.bytes, bits: a.bits + b.bits }
+      : { bytes: a.bytes + b, bits: a.bits },
+  { bytes: 0, bits: 0 }
+)
+
+const pack = (field, value, buf, offset) => {
+  field.pack(
+    value,
+    buf,
+    addOffsets(field.offset, offset)
+  )
+}
+
+const unpack = (field, buf, offset) =>
+  field.unpack(
+    buf,
+    addOffsets(field.offset, offset)
+  )
+
+// ===================================================================
+
+const streamToNewBuffer = stream => new Promise((resolve, reject) => {
+  const chunks = []
+  let length = 0
+
+  const onData = chunk => {
+    chunks.push(chunk)
+    length += chunk.length
+  }
+  stream.on('data', onData)
+
+  const clean = () => {
+    stream.removeListener('data', onData)
+    stream.removeListener('end', onEnd)
+    stream.removeListener('error', onError)
+  }
+  const onEnd = () => {
+    resolve(Buffer.concat(chunks, length))
+    clean()
+  }
+  stream.on('end', onEnd)
+  const onError = error => {
+    reject(error)
+    clean()
+  }
+  stream.on('error', onError)
+})
+
+const streamToExistingBuffer = (
+  stream,
+  buffer,
+  offset = 0,
+  end = buffer.length
+) => new Promise((resolve, reject) => {
+  assert(offset >= 0)
+  assert(end > offset)
+  assert(end <= buffer.length)
+
+  let i = offset
+
+  const onData = chunk => {
+    const prev = i
+    i += chunk.length
+
+    if (i > end) {
+      return onError(new Error('too much data'))
+    }
+
+    chunk.copy(buffer, prev)
+  }
+  stream.on('data', onData)
+
+  const clean = () => {
+    stream.removeListener('data', onData)
+    stream.removeListener('end', onEnd)
+    stream.removeListener('error', onError)
+  }
+  const onEnd = () => {
+    resolve(i - offset)
+    clean()
+  }
+  stream.on('end', onEnd)
+  const onError = error => {
+    reject(error)
+    clean()
+  }
+  stream.on('error', onError)
+})
+
+// ===================================================================
+
+// Returns the checksum of a raw struct.
+const computeChecksum = (struct, buf, offset = 0) => {
+  let sum = 0
+
+  // Do not use the stored checksum to compute the new checksum.
+  const checksumField = struct.fields.checksum
+  const checksumOffset = offset + checksumField.offset
+  for (let i = offset, n = checksumOffset; i < n; ++i) {
+    sum += buf[i]
+  }
+  for (let i = checksumOffset + checksumField.size, n = offset + struct.size; i < n; ++i) {
+    sum += buf[i]
+  }
+
+  return ~sum >>> 0
+}
+
+const verifyChecksum = (struct, buf, offset) =>
+  unpack(struct.fields.checksum, buf, offset) === computeChecksum(struct, buf, offset)
+
+const getParentLocatorSize = parentLocatorEntry => {
+  const { platformDataSpace } = parentLocatorEntry
+
+  if (platformDataSpace < SECTOR_SIZE) {
+    return platformDataSpace * SECTOR_SIZE
+  }
+
+  return (platformDataSpace % SECTOR_SIZE === 0)
+    ? platformDataSpace
+    : 0
+}
+
+// ===================================================================
+
+// Euclidean division, returns the quotient and the remainder of a / b.
+const div = (a, b) => [ Math.floor(a / b), a % b ]
+
+export default class Vhd {
+  constructor (handler, path) {
+    this._handler = handler
+    this._path = path
+
+    this._blockAllocationTable = null
+    this._blockBitmapSize = null
+    this._footer = null
+    this._header = null
+    this._parent = null
+    this._sectorsPerBlock = null
+  }
+
+  // Read `length` bytes starting from `begin`.
+  //
+  // - if `buffer`: it is filled starting from `offset`, and the
+  //   number of written bytes is returned;
+  // - otherwise: a new buffer is allocated and returned.
+  _read (begin, length, buf, offset) {
+    assert(begin >= 0)
+    assert(length > 0)
+
+    return this._handler.createReadStream(this._path, {
+      end: begin + length - 1,
+      start: begin
+    }).then(buf
+      ? stream => streamToExistingBuffer(stream, buf, offset, (offset || 0) + length)
+      : streamToNewBuffer
+    )
+  }
+
+  // - if `buffer`: it is filled with 0 starting from `offset`, and
+  //   the number of written bytes is returned;
+  // - otherwise: a new buffer is allocated and returned.
+  _zeroes (length, buf, offset = 0) {
+    if (buf) {
+      assert(offset >= 0)
+      assert(length > 0)
+
+      const end = offset + length
+      assert(end <= buf.length)
+
+      buf.fill(0, offset, end)
+      return Promise.resolve(length)
+    }
+
+    return Promise.resolve(Buffer.alloc(length))
+  }
+
+  // Return the position of a block in the VHD or undefined if not found.
+  _getBlockAddress (block) {
+    assert(block >= 0)
+    assert(block < this._header.maxTableEntries)
+
+    const blockAddr = this._blockAllocationTable[block]
+    if (blockAddr !== 0xFFFFFFFF) {
+      return blockAddr * SECTOR_SIZE
+    }
+  }
+
+  // -----------------------------------------------------------------
+
+  async readHeaderAndFooter () {
+    const buf = await this._read(0, FOOTER_SIZE + HEADER_SIZE)
+
+    if (!verifyChecksum(fuFooter, buf)) {
+      throw new Error('footer checksum does not match')
+    }
+
+    if (!verifyChecksum(fuHeader, buf, FOOTER_SIZE)) {
+      throw new Error('header checksum does not match')
+    }
+
+    return this._initMetadata(
+      unpack(fuHeader, buf, FOOTER_SIZE),
+      unpack(fuFooter, buf)
+    )
+  }
+
+  async _initMetadata (header, footer) {
+    const sectorsPerBlock = header.blockSize / SECTOR_SIZE
+    assert(sectorsPerBlock % 1 === 0)
+
+     // 1 bit per sector, rounded up to full sectors
+    this._blockBitmapSize = Math.ceil(sectorsPerBlock / 8 / SECTOR_SIZE) * SECTOR_SIZE
+    assert(this._blockBitmapSize === SECTOR_SIZE)
+
+    this._footer = footer
+    this._header = header
+    this.size = uint32ToUint64(this._footer.currentSize)
+
+    if (footer.diskType === HARD_DISK_TYPE_DIFFERENCING) {
+      const parent = new Vhd(
+        this._handler,
+        `${dirname(this._path)}/${header.parentUnicodeName}`
+      )
+      await parent.readHeaderAndFooter()
+      await parent.readBlockAllocationTable()
+
+      this._parent = parent
+    }
+  }
+
+  // -----------------------------------------------------------------
+
+  async readBlockAllocationTable () {
+    const { maxTableEntries, tableOffset } = this._header
+    const fuTable = fu.uint32(maxTableEntries)
+
+    this._blockAllocationTable = unpack(
+      fuTable,
+      await this._read(uint32ToUint64(tableOffset), fuTable.size)
+    )
+  }
+
+  // -----------------------------------------------------------------
+
+  // read a single sector in a block
+  async _readBlockSector (block, sector, begin, length, buf, offset) {
+    assert(begin >= 0)
+    assert(length > 0)
+    assert(begin + length <= SECTOR_SIZE)
+
+    const blockAddr = this._getBlockAddress(block)
+    const blockBitmapSize = this._blockBitmapSize
+    const parent = this._parent
+
+    if (blockAddr && (
+      !parent ||
+      testBit(await this._read(blockAddr, blockBitmapSize), sector)
+    )) {
+      return this._read(
+        blockAddr + blockBitmapSize + sector * SECTOR_SIZE + begin,
+        length,
+        buf,
+        offset
+      )
+    }
+
+    return parent
+      ? parent._readBlockSector(block, sector, begin, length, buf, offset)
+      : this._zeroes(length, buf, offset)
+  }
+
+  _readBlock (block, begin, length, buf, offset) {
+    assert(begin >= 0)
+    assert(length > 0)
+
+    const { blockSize } = this._header
+    assert(begin + length <= blockSize)
+
+    const blockAddr = this._getBlockAddress(block)
+    const parent = this._parent
+
+    if (!blockAddr) {
+      return parent
+        ? parent._readBlock(block, begin, length, buf, offset)
+        : this._zeroes(length, buf, offset)
+    }
+
+    if (!parent) {
+      return this._read(blockAddr + this._blockBitmapSize + begin, length, buf, offset)
+    }
+
+    // FIXME: we should read as many sectors in a single pass as
+    // possible for maximum perf.
+    const [ sector, beginInSector ] = div(begin, SECTOR_SIZE)
+    return this._readBlockSector(
+      block,
+      sector,
+      beginInSector,
+      Math.min(length, SECTOR_SIZE - beginInSector),
+      buf,
+      offset
+    )
+  }
+
+  read (buf, begin, length = buf.length, offset) {
+    assert(Buffer.isBuffer(buf))
+    assert(begin >= 0)
+
+    const { size } = this
+    if (begin >= size) {
+      return Promise.resolve(0)
+    }
+
+    const { blockSize } = this._header
+    const [ block, beginInBlock ] = div(begin, blockSize)
+
+    return this._readBlock(
+      block,
+      beginInBlock,
+      Math.min(length, blockSize - beginInBlock, size - begin),
+      buf,
+      offset
+    )
+  }
+}

packages/xo-acl-resolver/.babelrc

@@ -0,0 +1,8 @@
+{
+ "comments": false,
+ "compact": true,
+ "presets": [
+   "stage-0",
+   "es2015"
+ ]
+}

packages/xo-acl-resolver/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-acl-resolver/README.md

@@ -0,0 +1,74 @@
+# xo-acl-resolver [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> [Xen-Orchestra](http://xen-orchestra.com/) internal: do ACLs resolution.
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-acl-resolver):
+
+```
+> npm install --save xo-acl-resolver
+```
+
+## Usage
+
+```js
+import check from 'xo-acl-resolver'
+
+// This object contains a list of permissions returned from
+// xo-server's acl.getCurrentPermissions.
+const permissions = { /* ... */ }
+
+// This function should returns synchronously an object from an id.
+const getObject = id => { /* ... */ }
+
+// For a single object:
+if (check(permissions, getObject, objectId, permission)) {
+  console.log(`${permission} set for object ${objectId}`)
+}
+
+// For multiple objects/permissions:
+if (check(permissions, getObject, [
+  [ object1Id, permission1 ],
+  [ object12d, permission2 ],
+])) {
+  console.log('all permissions checked')
+}
+```
+
+## Development
+
+### Installing dependencies
+
+```
+> npm install
+```
+
+### Compilation
+
+The sources files are watched and automatically recompiled on changes.
+
+```
+> npm run dev
+```
+
+### Tests
+
+```
+> npm run test-dev
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+ISC © [Vates SAS](https://vates.fr)

packages/xo-acl-resolver/package.json

@@ -0,0 +1,48 @@
+{
+  "name": "xo-acl-resolver",
+  "version": "0.2.3",
+  "license": "ISC",
+  "description": "Xen-Orchestra internal: do ACLs resolution",
+  "keywords": [],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-acl-resolver",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@vates.fr"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=0.12"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.4.5",
+    "babel-eslint": "^7.0.0",
+    "babel-preset-es2015": "^6.3.13",
+    "babel-preset-stage-0": "^6.3.13",
+    "dependency-check": "^2.5.1",
+    "standard": "^8.0.0"
+  },
+  "scripts": {
+    "build": "babel --source-maps --out-dir=dist/ src/",
+    "depcheck": "dependency-check ./package.json",
+    "dev": "babel --watch --source-maps --out-dir=dist/ src/",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prepublish": "yarn run build"
+  },
+  "standard": {
+    "ignore": [
+      "dist/**"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-acl-resolver/src/index.js

@@ -0,0 +1,131 @@
+// These global variables are not a problem because the algorithm is
+// synchronous.
+let permissionsByObject
+let getObject
+
+// -------------------------------------------------------------------
+
+const authorized = () => true // eslint-disable-line no-unused-vars
+const forbiddden = () => false // eslint-disable-line no-unused-vars
+
+const and = (...checkers) => (object, permission) => { // eslint-disable-line no-unused-vars
+  for (const checker of checkers) {
+    if (!checker(object, permission)) {
+      return false
+    }
+  }
+  return true
+}
+
+const or = (...checkers) => (object, permission) => { // eslint-disable-line no-unused-vars
+  for (const checker of checkers) {
+    if (checker(object, permission)) {
+      return true
+    }
+  }
+  return false
+}
+
+// -------------------------------------------------------------------
+
+const checkMember = (memberName) => (object, permission) => {
+  const member = object[memberName]
+  return member !== object.id && checkAuthorization(member, permission)
+}
+
+const checkSelf = ({ id }, permission) => {
+  const permissionsForObject = permissionsByObject[id]
+
+  return (
+    permissionsForObject &&
+    permissionsForObject[permission]
+  )
+}
+
+// ===================================================================
+
+const checkAuthorizationByTypes = {
+  host: or(checkSelf, checkMember('$pool')),
+
+  message: checkMember('$object'),
+
+  network: or(checkSelf, checkMember('$pool')),
+
+  SR: or(checkSelf, checkMember('$pool')),
+
+  task: checkMember('$host'),
+
+  VBD: checkMember('VDI'),
+
+  // Access to a VDI is granted if the user has access to the
+  // containing SR or to a linked VM.
+  VDI (vdi, permission) {
+    // Check authorization for the containing SR.
+    if (checkAuthorization(vdi.$SR, permission)) {
+      return true
+    }
+
+    // Check authorization for each of the connected VMs.
+    for (const vbdId of vdi.$VBDs) {
+      if (checkAuthorization(getObject(vbdId).VM, permission)) {
+        return true
+      }
+    }
+
+    return false
+  },
+
+  'VDI-snapshot': checkMember('$snapshot_of'),
+
+  VIF: or(checkMember('$network'), checkMember('$VM')),
+
+  VM: or(checkSelf, checkMember('$container')),
+
+  'VM-controller': checkMember('$container'),
+
+  'VM-snapshot': checkMember('$snapshot_of'),
+
+  'VM-template': or(checkSelf, checkMember('$pool'))
+}
+
+// Hoisting is important for this function.
+function checkAuthorization (objectId, permission) {
+  const object = getObject(objectId)
+  if (!object) {
+    return false
+  }
+
+  const checker = checkAuthorizationByTypes[object.type] || checkSelf
+
+  return checker(object, permission)
+}
+
+// -------------------------------------------------------------------
+
+export default (
+  permissionsByObject_,
+  getObject_,
+  permissions,
+  permission
+) => {
+  // Assign global variables.
+  permissionsByObject = permissionsByObject_
+  getObject = getObject_
+
+  try {
+    if (permission) {
+      return checkAuthorization(permissions, permission)
+    } else {
+      for (const [objectId, permission] of permissions) {
+        if (!checkAuthorization(objectId, permission)) {
+          return false
+        }
+      }
+    }
+
+    return true
+  } finally {
+    // Free the global variables.
+    permissionsByObject = getObject = null
+  }
+}

packages/xo-cli/.jshintrc

@@ -0,0 +1,90 @@
+{
+  // Julien Fontanet JSHint configuration
+  //
+  // Changes from defaults:
+  // - all enforcing options (except `++` & `--`) enabled
+  // - single quotes
+  // - indentation set to 2 instead of 4
+  // - almost all relaxing options disabled
+  // - allow expression statements (necessary for chai.expect())
+  // - allow global strict (most of my devs are in Node.js or Browserify)
+  // - environments are set to Browserify, mocha & Node.js
+  //
+  // See http://jshint.com/docs/ for more details
+
+  "maxerr"        : 50,       // {int} Maximum error before stopping
+
+  // Enforcing
+  "bitwise"       : true,     // true: Prohibit bitwise operators (&, |, ^, etc.)
+  "camelcase"     : true,     // true: Identifiers must be in camelCase
+  "curly"         : true,     // true: Require {} for every new block or scope
+  "eqeqeq"        : true,     // true: Require triple equals (===) for comparison
+  "forin"         : true,     // true: Require filtering for..in loops with obj.hasOwnProperty()
+  "immed"         : true,     // true: Require immediate invocations to be wrapped in parens e.g. `(function () { } ());`
+  "indent"        : 2,        // {int} Number of spaces to use for indentation
+  "latedef"       : true,     // true: Require variables/functions to be defined before being used
+  "newcap"        : true,     // true: Require capitalization of all constructor functions e.g. `new F()`
+  "noarg"         : true,     // true: Prohibit use of `arguments.caller` and `arguments.callee`
+  "noempty"       : true,     // true: Prohibit use of empty blocks
+  "nonew"         : true,     // true: Prohibit use of constructors for side-effects (without assignment)
+  "plusplus"      : false,    // true: Prohibit use of `++` & `--`
+  "quotmark"      : "single", // Quotation mark consistency:
+                              //   false    : do nothing (default)
+                              //   true     : ensure whatever is used is consistent
+                              //   "single" : require single quotes
+                              //   "double" : require double quotes
+  "undef"         : true,     // true: Require all non-global variables to be declared (prevents global leaks)
+  "unused"        : true,     // true: Require all defined variables be used
+  "strict"        : true,     // true: Requires all functions run in ES5 Strict Mode
+  "maxparams"     : 4,        // {int} Max number of formal params allowed per function
+  "maxdepth"      : 3,        // {int} Max depth of nested blocks (within functions)
+  "maxstatements" : 20,       // {int} Max number statements per function
+  "maxcomplexity" : 7,        // {int} Max cyclomatic complexity per function
+  "maxlen"        : 80,       // {int} Max number of characters per line
+
+  // Relaxing
+  "asi"           : false,     // true: Tolerate Automatic Semicolon Insertion (no semicolons)
+  "boss"          : false,     // true: Tolerate assignments where comparisons would be expected
+  "debug"         : false,     // true: Allow debugger statements e.g. browser breakpoints.
+  "eqnull"        : false,     // true: Tolerate use of `== null`
+  "es5"           : false,     // true: Allow ES5 syntax (ex: getters and setters)
+  "esnext"        : false,     // true: Allow ES.next (ES6) syntax (ex: `const`)
+  "moz"           : false,     // true: Allow Mozilla specific syntax (extends and overrides esnext features)
+                               // (ex: `for each`, multiple try/catch, function expression…)
+  "evil"          : false,     // true: Tolerate use of `eval` and `new Function()`
+  "expr"          : true,      // true: Tolerate `ExpressionStatement` as Programs
+  "funcscope"     : false,     // true: Tolerate defining variables inside control statements
+  "globalstrict"  : true,      // true: Allow global "use strict" (also enables 'strict')
+  "iterator"      : false,     // true: Tolerate using the `__iterator__` property
+  "lastsemic"     : false,     // true: Tolerate omitting a semicolon for the last statement of a 1-line block
+  "laxbreak"      : false,     // true: Tolerate possibly unsafe line breakings
+  "laxcomma"      : false,     // true: Tolerate comma-first style coding
+  "loopfunc"      : false,     // true: Tolerate functions being defined in loops
+  "multistr"      : false,     // true: Tolerate multi-line strings
+  "proto"         : false,     // true: Tolerate using the `__proto__` property
+  "scripturl"     : false,     // true: Tolerate script-targeted URLs
+  "shadow"        : false,     // true: Allows re-define variables later in code e.g. `var x=1; x=2;`
+  "sub"           : false,     // true: Tolerate using `[]` notation when it can still be expressed in dot notation
+  "supernew"      : false,     // true: Tolerate `new function () { ... };` and `new Object;`
+  "validthis"     : false,     // true: Tolerate using this in a non-constructor function
+
+  // Environments
+  "browser"       : false,    // Web Browser (window, document, etc)
+  "browserify"    : true,     // Browserify (node.js code in the browser)
+  "couch"         : false,    // CouchDB
+  "devel"         : true,     // Development/debugging (alert, confirm, etc)
+  "dojo"          : false,    // Dojo Toolkit
+  "jquery"        : false,    // jQuery
+  "mocha"         : true,     // mocha
+  "mootools"      : false,    // MooTools
+  "node"          : true,     // Node.js
+  "nonstandard"   : false,    // Widely adopted globals (escape, unescape, etc)
+  "prototypejs"   : false,    // Prototype and Scriptaculous
+  "rhino"         : false,    // Rhino
+  "worker"        : false,    // Web Workers
+  "wsh"           : false,    // Windows Scripting Host
+  "yui"           : false,    // Yahoo User Interface
+
+  // Custom Globals
+  "globals"       : {}        // additional predefined global variables
+}

packages/xo-cli/README.md

@@ -0,0 +1,130 @@
+# XO-CLI
+[![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](http://travis-ci.org/vatesfr/xen-orchestra)
+[![Dependency Status](https://david-dm.org/vatesfr/xo-cli/status.svg?theme=shields.io)](https://david-dm.org/vatesfr/xo-cli)
+[![devDependency Status](https://david-dm.org/vatesfr/xo-cli/dev-status.svg?theme=shields.io)](https://david-dm.org/vatesfr/xo-cli#info=devDependencies)
+
+> Basic CLI for Xen-Orchestra
+
+## Installation
+
+#### [npm](https://npmjs.org/package/xo-cli)
+
+```
+npm install -g xo-cli
+```
+
+## Usage
+
+```
+> xo-cli --help
+Usage:
+
+  xo-cli --register [<XO-Server URL>] [<username>] [<password>]
+    Registers the XO instance to use.
+
+  xo-cli --unregister
+    Remove stored credentials.
+
+  xo-cli --list-commands [--json] [<pattern>]...
+    Returns the list of available commands on the current XO instance.
+
+    The patterns can be used to filter on command names.
+
+  xo-cli --list-objects [--<property>]… [<property>=<value>]...
+    Returns a list of XO objects.
+
+    --<property>
+      Restricts displayed properties to those listed.
+
+    <property>=<value>
+      Restricted displayed objects to those matching the patterns.
+
+  xo-cli <command> [<name>=<value>]...
+    Executes a command on the current XO instance.
+```
+
+#### Register your XO instance
+
+```
+> xo-cli --register http://xo.my-company.net admin@admin.net admin
+Successfully logged with admin@admin.net
+```
+
+Note: only a token will be saved in the configuration file.
+
+#### List available objects
+
+Prints all objects:
+
+```
+> xo-cli --list-objects
+```
+
+It is possible to filter on object properties, for instance to prints
+all VM templates:
+
+```
+> xo-cli --list-objects type=VM-template
+```
+
+#### List available commands
+
+```
+> xo-cli --list-commands
+```
+
+Commands can be filtered using patterns:
+
+```
+> xo-cli --list-commands '{user,group}.*'
+```
+
+#### Execute a command
+
+The same syntax is used for all commands: `xo-cli <command> <param
+name>=<value>...`
+
+E.g., adding a new server:
+
+```
+> xo-cli server.add host=my.server.net username=root password=secret-password
+42
+```
+
+The return value is the identifier of this new server in XO.
+
+Parameters (except `true` and `false` which are correctly parsed as
+booleans) are assumed to be strings, for other types, you may use JSON
+encoding by prefixing with `json:`:
+
+```
+> xo-cli foo.bar baz='json:[1, 2, 3]'
+```
+
+##### VM export
+
+```
+> xo-cli vm.export vm=a01667e0-8e29-49fc-a550-17be4226783c @=vm.xva
+```
+
+##### VM import
+
+ ```
+> xo-cli vm.import host=60a6939e-8b0a-4352-9954-5bde44bcdf7d @=vm.xva
+```
+
+## Contributing
+
+Contributions are *very* welcome, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+XO-CLI is released under the [AGPL
+v3](http://www.gnu.org/licenses/agpl-3.0-standalone.html).

packages/xo-cli/config.js

@@ -0,0 +1,54 @@
+'use strict'
+
+// ===================================================================
+
+var promisify = require('bluebird').promisify
+
+var readFile = promisify(require('fs').readFile)
+var writeFile = promisify(require('fs').writeFile)
+
+var assign = require('lodash/assign')
+var l33t = require('l33teral')
+var mkdirp = promisify(require('mkdirp'))
+var xdgBasedir = require('xdg-basedir')
+
+// ===================================================================
+
+var configPath = xdgBasedir.config + '/xo-cli'
+var configFile = configPath + '/config.json'
+
+// ===================================================================
+
+var load = exports.load = function () {
+  return readFile(configFile).then(JSON.parse).catch(function () {
+    return {}
+  })
+}
+
+exports.get = function (path) {
+  return load().then(function (config) {
+    return l33t(config).tap(path)
+  })
+}
+
+var save = exports.save = function (config) {
+  return mkdirp(configPath).then(function () {
+    return writeFile(configFile, JSON.stringify(config))
+  })
+}
+
+exports.set = function (data) {
+  return load().then(function (config) {
+    return save(assign(config, data))
+  })
+}
+
+exports.unset = function (paths) {
+  return load().then(function (config) {
+    var l33tConfig = l33t(config)
+    ;[].concat(paths).forEach(function (path) {
+      l33tConfig.purge(path, true)
+    })
+    return save(config)
+  })
+}

packages/xo-cli/index.js

@@ -0,0 +1,410 @@
+#!/usr/bin/env node
+
+'use strict'
+
+var Bluebird = require('bluebird')
+Bluebird.longStackTraces()
+
+var createReadStream = require('fs').createReadStream
+var createWriteStream = require('fs').createWriteStream
+var resolveUrl = require('url').resolve
+var stat = require('fs-promise').stat
+
+var chalk = require('chalk')
+var eventToPromise = require('event-to-promise')
+var filter = require('lodash/filter')
+var forEach = require('lodash/forEach')
+var getKeys = require('lodash/keys')
+var got = require('got')
+var humanFormat = require('human-format')
+var identity = require('lodash/identity')
+var isArray = require('lodash/isArray')
+var isObject = require('lodash/isObject')
+var micromatch = require('micromatch')
+var multiline = require('multiline')
+var nicePipe = require('nice-pipe')
+var pairs = require('lodash/toPairs')
+var pick = require('lodash/pick')
+var prettyMs = require('pretty-ms')
+var progressStream = require('progress-stream')
+var Xo = require('xo-lib').default
+
+// -------------------------------------------------------------------
+
+var config = require('./config')
+
+// ===================================================================
+
+function connect () {
+  return config.load().bind({}).then(function (config) {
+    if (!config.server) {
+      throw new Error('no server to connect to!')
+    }
+
+    if (!config.token) {
+      throw new Error('no token available')
+    }
+
+    var xo = new Xo({ url: config.server })
+
+    return xo.open().then(function () {
+      return xo.signIn({ token: config.token })
+    }).then(function () {
+      return xo
+    })
+  })
+}
+
+function _startsWith (string, search) {
+  return string.lastIndexOf(search, 0) === 0
+}
+
+var FLAG_RE = /^--([^=]+)(?:=([^]*))?$/
+function extractFlags (args) {
+  var flags = {}
+
+  var i = 0
+  var n = args.length
+  var matches
+  while (i < n && (matches = args[i].match(FLAG_RE))) {
+    var value = matches[2]
+
+    flags[matches[1]] = value === undefined ? true : value
+    ++i
+  }
+  args.splice(0, i)
+
+  return flags
+}
+
+var PARAM_RE = /^([^=]+)=([^]*)$/
+function parseParameters (args) {
+  var params = {}
+  forEach(args, function (arg) {
+    var matches
+    if (!(matches = arg.match(PARAM_RE))) {
+      throw new Error('invalid arg: ' + arg)
+    }
+    var name = matches[1]
+    var value = matches[2]
+
+    if (_startsWith(value, 'json:')) {
+      value = JSON.parse(value.slice(5))
+    }
+
+    if (name === '@') {
+      params['@'] = value
+      return
+    }
+
+    if (value === 'true') {
+      value = true
+    } else if (value === 'false') {
+      value = false
+    }
+
+    params[name] = value
+  })
+
+  return params
+}
+
+var humanFormatOpts = {
+  unit: 'B',
+  scale: 'binary'
+}
+
+function printProgress (progress) {
+  if (progress.length) {
+    console.warn('%s% of %s @ %s/s - ETA %s',
+      Math.round(progress.percentage),
+      humanFormat(progress.length, humanFormatOpts),
+      humanFormat(progress.speed, humanFormatOpts),
+      prettyMs(progress.eta * 1e3)
+    )
+  } else {
+    console.warn('%s @ %s/s',
+      humanFormat(progress.transferred, humanFormatOpts),
+      humanFormat(progress.speed, humanFormatOpts)
+    )
+  }
+}
+
+function wrap (val) {
+  return function wrappedValue () {
+    return val
+  }
+}
+
+// ===================================================================
+
+var help = wrap((function (pkg) {
+  return multiline.stripIndent(function () { /*
+    Usage:
+
+      $name --register [<XO-Server URL>] [<username>] [<password>]
+        Registers the XO instance to use.
+
+      $name --unregister
+        Remove stored credentials.
+
+      $name --list-commands [--json] [<pattern>]...
+        Returns the list of available commands on the current XO instance.
+
+        The patterns can be used to filter on command names.
+
+      $name --list-objects [--<property>]… [<property>=<value>]...
+        Returns a list of XO objects.
+
+        --<property>
+          Restricts displayed properties to those listed.
+
+        <property>=<value>
+          Restricted displayed objects to those matching the patterns.
+
+      $name <command> [<name>=<value>]...
+        Executes a command on the current XO instance.
+
+    $name v$version
+  */ }).replace(/<([^>]+)>|\$(\w+)/g, function (_, arg, key) {
+    if (arg) {
+      return '<' + chalk.yellow(arg) + '>'
+    }
+
+    if (key === 'name') {
+      return chalk.bold(pkg[key])
+    }
+
+    return pkg[key]
+  })
+})(require('./package')))
+
+// -------------------------------------------------------------------
+
+function main (args) {
+  if (!args || !args.length || args[0] === '-h') {
+    return help()
+  }
+
+  var fnName = args[0].replace(/^--|-\w/g, function (match) {
+    if (match === '--') {
+      return ''
+    }
+
+    return match[1].toUpperCase()
+  })
+  if (fnName in exports) {
+    return exports[fnName](args.slice(1))
+  }
+
+  return exports.call(args)
+}
+exports = module.exports = main
+
+// -------------------------------------------------------------------
+
+exports.help = help
+
+function register (args) {
+  var xo = new Xo({ url: args[0] })
+  return xo.open().then(function () {
+    return xo.signIn({
+      email: args[1],
+      password: args[2]
+    })
+  }).then(function () {
+    console.log('Successfully logged with', xo.user.email)
+
+    return xo.call('token.create')
+  }).then(function (token) {
+    return config.set({
+      server: args[0],
+      token: token
+    })
+  })
+}
+exports.register = register
+
+function unregister () {
+  return config.unset([
+    'server',
+    'token'
+  ])
+}
+exports.unregister = unregister
+
+function listCommands (args) {
+  return connect().then(function getMethodsInfo (xo) {
+    return xo.call('system.getMethodsInfo')
+  }).then(function formatMethodsInfo (methods) {
+    var json = false
+    var patterns = []
+    forEach(args, function (arg) {
+      if (arg === '--json') {
+        json = true
+      } else {
+        patterns.push(arg)
+      }
+    })
+
+    if (patterns.length) {
+      methods = pick(methods, micromatch(Object.keys(methods), patterns))
+    }
+
+    if (json) {
+      return methods
+    }
+
+    methods = pairs(methods)
+    methods.sort(function (a, b) {
+      a = a[0]
+      b = b[0]
+      if (a < b) {
+        return -1
+      }
+      return +(a > b)
+    })
+
+    var str = []
+    forEach(methods, function (method) {
+      var name = method[0]
+      var info = method[1]
+      str.push(chalk.bold.blue(name))
+      forEach(info.params || [], function (info, name) {
+        str.push(' ')
+        if (info.optional) {
+          str.push('[')
+        }
+
+        var type = info.type
+        str.push(
+          name,
+          '=<',
+          type == null
+            ? 'unknown type'
+            : isArray(type)
+              ? type.join('|')
+              : type,
+          '>'
+        )
+
+        if (info.optional) {
+          str.push(']')
+        }
+      })
+      str.push('\n')
+      if (info.description) {
+        str.push('  ', info.description, '\n')
+      }
+    })
+    return str.join('')
+  })
+}
+exports.listCommands = listCommands
+
+function listObjects (args) {
+  var properties = getKeys(extractFlags(args))
+  var filterProperties = properties.length
+    ? function (object) {
+      return pick(object, properties)
+    }
+    : identity
+
+  var sieve = args.length ? parseParameters(args) : null
+
+  return connect().then(function getXoObjects (xo) {
+    return xo.call('xo.getAllObjects')
+  }).then(function filterObjects (objects) {
+    objects = filter(objects, sieve)
+
+    const stdout = process.stdout
+    stdout.write('[\n')
+    for (var i = 0, n = objects.length; i < n;) {
+      stdout.write(JSON.stringify(filterProperties(objects[i]), null, 2))
+      stdout.write(++i < n ? ',\n' : '\n')
+    }
+    stdout.write(']')
+  })
+}
+exports.listObjects = listObjects
+
+function call (args) {
+  if (!args.length) {
+    throw new Error('missing command name')
+  }
+
+  var method = args.shift()
+  var params = parseParameters(args)
+
+  var file = params['@']
+  delete params['@']
+
+  var baseUrl
+  return connect().then(function (xo) {
+    // FIXME: do not use private properties.
+    baseUrl = xo._url.replace(/^ws/, 'http')
+
+    return xo.call(method, params)
+  }).then(function handleResult (result) {
+    var keys, key, url
+    if (
+      isObject(result) &&
+      (keys = getKeys(result)).length === 1
+    ) {
+      key = keys[0]
+
+      if (key === '$getFrom') {
+        url = resolveUrl(baseUrl, result[key])
+        var output = createWriteStream(file)
+
+        var progress = progressStream({ time: 1e3 }, printProgress)
+
+        return eventToPromise(nicePipe([
+          got.stream(url).on('response', function (response) {
+            var length = response.headers['content-length']
+            if (length) {
+              progress.length(length)
+            }
+          }),
+          progress,
+          output
+        ]), 'finish')
+      }
+
+      if (key === '$sendTo') {
+        url = resolveUrl(baseUrl, result[key])
+
+        return stat(file).then(function (stats) {
+          var length = stats.size
+
+          var input = nicePipe([
+            createReadStream(file),
+            progressStream({
+              length: length,
+              time: 1e3
+            }, printProgress)
+          ])
+
+          return got.post(url, {
+            body: input,
+            headers: {
+              'content-length': length
+            },
+            method: 'POST'
+          }).then(function (response) {
+            return response.body
+          })
+        })
+      }
+    }
+
+    return result
+  })
+}
+exports.call = call
+
+// ===================================================================
+
+if (!module.parent) {
+  require('exec-promise')(exports)
+}

packages/xo-cli/package.json

@@ -0,0 +1,57 @@
+{
+  "name": "xo-cli",
+  "version": "0.8.2",
+  "license": "AGPL-3.0",
+  "description": "Basic CLI for Xen-Orchestra",
+  "keywords": [
+    "xo",
+    "xen-orchestra",
+    "xen",
+    "orchestra"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-cli",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "author": "Julien Fontanet <julien.fontanet@vates.fr>",
+  "preferGlobal": true,
+  "bin": {
+    "xo-cli": "index.js"
+  },
+  "files": [
+    "*.js"
+  ],
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "dependencies": {
+    "bluebird": "^3.4.6",
+    "chalk": "^1.1.1",
+    "event-to-promise": "^0.7.0",
+    "exec-promise": "^0.6.1",
+    "fs-promise": "^1.0.0",
+    "got": "^6.5.0",
+    "human-format": "^0.7.0",
+    "l33teral": "^3.0.2",
+    "lodash": "^4.16.4",
+    "micromatch": "^2.2.0",
+    "mkdirp": "^0.5.0",
+    "multiline": "^1.0.2",
+    "nice-pipe": "0.0.0",
+    "pretty-ms": "^2.1.0",
+    "progress-stream": "^1.1.1",
+    "xdg-basedir": "^2.0.0",
+    "xo-lib": "^0.8.0"
+  },
+  "devDependencies": {
+    "standard": "^8.1.0"
+  },
+  "scripts": {
+    "lint": "standard",
+    "posttest": "yarn run lint"
+  },
+  "greenkeeper": {
+    "ignore": [
+      "nice-pipe"
+    ]
+  }
+}

packages/xo-collection/.npmignore

@@ -0,0 +1,24 @@
+/benchmark/
+/benchmarks/
+*.bench.js
+*.bench.js.map
+
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/fixture/
+/fixtures/
+*.fixture.js
+*.fixture.js.map
+*.fixtures.js
+*.fixtures.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map
+
+__snapshots__/

packages/xo-collection/LICENSE

@@ -0,0 +1,662 @@
+GNU AFFERO GENERAL PUBLIC LICENSE
+                       Version 3, 19 November 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+                            Preamble
+
+  The GNU Affero General Public License is a free, copyleft license for
+software and other kinds of works, specifically designed to ensure
+cooperation with the community in the case of network server software.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+our General Public Licenses are intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
+
+  Developers that use our General Public Licenses protect your rights
+with two steps: (1) assert copyright on the software, and (2) offer
+you this License which gives you legal permission to copy, distribute
+and/or modify the software.
+
+  A secondary benefit of defending all users' freedom is that
+improvements made in alternate versions of the program, if they
+receive widespread use, become available for other developers to
+incorporate.  Many developers of free software are heartened and
+encouraged by the resulting cooperation.  However, in the case of
+software used on network servers, this result may fail to come about.
+The GNU General Public License permits making a modified version and
+letting the public access it on a server without ever releasing its
+source code to the public.
+
+  The GNU Affero General Public License is designed specifically to
+ensure that, in such cases, the modified source code becomes available
+to the community.  It requires the operator of a network server to
+provide the source code of the modified version running there to the
+users of that server.  Therefore, public use of a modified version, on
+a publicly accessible server, gives the public access to the source
+code of the modified version.
+
+  An older license, called the Affero General Public License and
+published by Affero, was designed to accomplish similar goals.  This is
+a different license, not a version of the Affero GPL, but Affero has
+released a new version of the Affero GPL which permits relicensing under
+this license.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+                       TERMS AND CONDITIONS
+
+  0. Definitions.
+
+  "This License" refers to version 3 of the GNU Affero General Public License.
+
+  "Copyright" also means copyright-like laws that apply to other kinds of
+works, such as semiconductor masks.
+
+  "The Program" refers to any copyrightable work licensed under this
+License.  Each licensee is addressed as "you".  "Licensees" and
+"recipients" may be individuals or organizations.
+
+  To "modify" a work means to copy from or adapt all or part of the work
+in a fashion requiring copyright permission, other than the making of an
+exact copy.  The resulting work is called a "modified version" of the
+earlier work or a work "based on" the earlier work.
+
+  A "covered work" means either the unmodified Program or a work based
+on the Program.
+
+  To "propagate" a work means to do anything with it that, without
+permission, would make you directly or secondarily liable for
+infringement under applicable copyright law, except executing it on a
+computer or modifying a private copy.  Propagation includes copying,
+distribution (with or without modification), making available to the
+public, and in some countries other activities as well.
+
+  To "convey" a work means any kind of propagation that enables other
+parties to make or receive copies.  Mere interaction with a user through
+a computer network, with no transfer of a copy, is not conveying.
+
+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
+tells the user that there is no warranty for the work (except to the
+extent that warranties are provided), that licensees may convey the
+work under this License, and how to view a copy of this License.  If
+the interface presents a list of user commands or options, such as a
+menu, a prominent item in the list meets this criterion.
+
+  1. Source Code.
+
+  The "source code" for a work means the preferred form of the work
+for making modifications to it.  "Object code" means any non-source
+form of a work.
+
+  A "Standard Interface" means an interface that either is an official
+standard defined by a recognized standards body, or, in the case of
+interfaces specified for a particular programming language, one that
+is widely used among developers working in that language.
+
+  The "System Libraries" of an executable work include anything, other
+than the work as a whole, that (a) is included in the normal form of
+packaging a Major Component, but which is not part of that Major
+Component, and (b) serves only to enable use of the work with that
+Major Component, or to implement a Standard Interface for which an
+implementation is available to the public in source code form.  A
+"Major Component", in this context, means a major essential component
+(kernel, window system, and so on) of the specific operating system
+(if any) on which the executable work runs, or a compiler used to
+produce the work, or an object code interpreter used to run it.
+
+  The "Corresponding Source" for a work in object code form means all
+the source code needed to generate, install, and (for an executable
+work) run the object code and to modify the work, including scripts to
+control those activities.  However, it does not include the work's
+System Libraries, or general-purpose tools or generally available free
+programs which are used unmodified in performing those activities but
+which are not part of the work.  For example, Corresponding Source
+includes interface definition files associated with source files for
+the work, and the source code for shared libraries and dynamically
+linked subprograms that the work is specifically designed to require,
+such as by intimate data communication or control flow between those
+subprograms and other parts of the work.
+
+  The Corresponding Source need not include anything that users
+can regenerate automatically from other parts of the Corresponding
+Source.
+
+  The Corresponding Source for a work in source code form is that
+same work.
+
+  2. Basic Permissions.
+
+  All rights granted under this License are granted for the term of
+copyright on the Program, and are irrevocable provided the stated
+conditions are met.  This License explicitly affirms your unlimited
+permission to run the unmodified Program.  The output from running a
+covered work is covered by this License only if the output, given its
+content, constitutes a covered work.  This License acknowledges your
+rights of fair use or other equivalent, as provided by copyright law.
+
+  You may make, run and propagate covered works that you do not
+convey, without conditions so long as your license otherwise remains
+in force.  You may convey covered works to others for the sole purpose
+of having them make modifications exclusively for you, or provide you
+with facilities for running those works, provided that you comply with
+the terms of this License in conveying all material for which you do
+not control copyright.  Those thus making or running the covered works
+for you must do so exclusively on your behalf, under your direction
+and control, on terms that prohibit them from making any copies of
+your copyrighted material outside their relationship with you.
+
+  Conveying under any other circumstances is permitted solely under
+the conditions stated below.  Sublicensing is not allowed; section 10
+makes it unnecessary.
+
+  3. Protecting Users' Legal Rights From Anti-Circumvention Law.
+
+  No covered work shall be deemed part of an effective technological
+measure under any applicable law fulfilling obligations under article
+11 of the WIPO copyright treaty adopted on 20 December 1996, or
+similar laws prohibiting or restricting circumvention of such
+measures.
+
+  When you convey a covered work, you waive any legal power to forbid
+circumvention of technological measures to the extent such circumvention
+is effected by exercising rights under this License with respect to
+the covered work, and you disclaim any intention to limit operation or
+modification of the work as a means of enforcing, against the work's
+users, your or third parties' legal rights to forbid circumvention of
+technological measures.
+
+  4. Conveying Verbatim Copies.
+
+  You may convey verbatim copies of the Program's source code as you
+receive it, in any medium, provided that you conspicuously and
+appropriately publish on each copy an appropriate copyright notice;
+keep intact all notices stating that this License and any
+non-permissive terms added in accord with section 7 apply to the code;
+keep intact all notices of the absence of any warranty; and give all
+recipients a copy of this License along with the Program.
+
+  You may charge any price or no price for each copy that you convey,
+and you may offer support or warranty protection for a fee.
+
+  5. Conveying Modified Source Versions.
+
+  You may convey a work based on the Program, or the modifications to
+produce it from the Program, in the form of source code under the
+terms of section 4, provided that you also meet all of these conditions:
+
+    a) The work must carry prominent notices stating that you modified
+    it, and giving a relevant date.
+
+    b) The work must carry prominent notices stating that it is
+    released under this License and any conditions added under section
+    7.  This requirement modifies the requirement in section 4 to
+    "keep intact all notices".
+
+    c) You must license the entire work, as a whole, under this
+    License to anyone who comes into possession of a copy.  This
+    License will therefore apply, along with any applicable section 7
+    additional terms, to the whole of the work, and all its parts,
+    regardless of how they are packaged.  This License gives no
+    permission to license the work in any other way, but it does not
+    invalidate such permission if you have separately received it.
+
+    d) If the work has interactive user interfaces, each must display
+    Appropriate Legal Notices; however, if the Program has interactive
+    interfaces that do not display Appropriate Legal Notices, your
+    work need not make them do so.
+
+  A compilation of a covered work with other separate and independent
+works, which are not by their nature extensions of the covered work,
+and which are not combined with it such as to form a larger program,
+in or on a volume of a storage or distribution medium, is called an
+"aggregate" if the compilation and its resulting copyright are not
+used to limit the access or legal rights of the compilation's users
+beyond what the individual works permit.  Inclusion of a covered work
+in an aggregate does not cause this License to apply to the other
+parts of the aggregate.
+
+  6. Conveying Non-Source Forms.
+
+  You may convey a covered work in object code form under the terms
+of sections 4 and 5, provided that you also convey the
+machine-readable Corresponding Source under the terms of this License,
+in one of these ways:
+
+    a) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by the
+    Corresponding Source fixed on a durable physical medium
+    customarily used for software interchange.
+
+    b) Convey the object code in, or embodied in, a physical product
+    (including a physical distribution medium), accompanied by a
+    written offer, valid for at least three years and valid for as
+    long as you offer spare parts or customer support for that product
+    model, to give anyone who possesses the object code either (1) a
+    copy of the Corresponding Source for all the software in the
+    product that is covered by this License, on a durable physical
+    medium customarily used for software interchange, for a price no
+    more than your reasonable cost of physically performing this
+    conveying of source, or (2) access to copy the
+    Corresponding Source from a network server at no charge.
+
+    c) Convey individual copies of the object code with a copy of the
+    written offer to provide the Corresponding Source.  This
+    alternative is allowed only occasionally and noncommercially, and
+    only if you received the object code with such an offer, in accord
+    with subsection 6b.
+
+    d) Convey the object code by offering access from a designated
+    place (gratis or for a charge), and offer equivalent access to the
+    Corresponding Source in the same way through the same place at no
+    further charge.  You need not require recipients to copy the
+    Corresponding Source along with the object code.  If the place to
+    copy the object code is a network server, the Corresponding Source
+    may be on a different server (operated by you or a third party)
+    that supports equivalent copying facilities, provided you maintain
+    clear directions next to the object code saying where to find the
+    Corresponding Source.  Regardless of what server hosts the
+    Corresponding Source, you remain obligated to ensure that it is
+    available for as long as needed to satisfy these requirements.
+
+    e) Convey the object code using peer-to-peer transmission, provided
+    you inform other peers where the object code and Corresponding
+    Source of the work are being offered to the general public at no
+    charge under subsection 6d.
+
+  A separable portion of the object code, whose source code is excluded
+from the Corresponding Source as a System Library, need not be
+included in conveying the object code work.
+
+  A "User Product" is either (1) a "consumer product", which means any
+tangible personal property which is normally used for personal, family,
+or household purposes, or (2) anything designed or sold for incorporation
+into a dwelling.  In determining whether a product is a consumer product,
+doubtful cases shall be resolved in favor of coverage.  For a particular
+product received by a particular user, "normally used" refers to a
+typical or common use of that class of product, regardless of the status
+of the particular user or of the way in which the particular user
+actually uses, or expects or is expected to use, the product.  A product
+is a consumer product regardless of whether the product has substantial
+commercial, industrial or non-consumer uses, unless such uses represent
+the only significant mode of use of the product.
+
+  "Installation Information" for a User Product means any methods,
+procedures, authorization keys, or other information required to install
+and execute modified versions of a covered work in that User Product from
+a modified version of its Corresponding Source.  The information must
+suffice to ensure that the continued functioning of the modified object
+code is in no case prevented or interfered with solely because
+modification has been made.
+
+  If you convey an object code work under this section in, or with, or
+specifically for use in, a User Product, and the conveying occurs as
+part of a transaction in which the right of possession and use of the
+User Product is transferred to the recipient in perpetuity or for a
+fixed term (regardless of how the transaction is characterized), the
+Corresponding Source conveyed under this section must be accompanied
+by the Installation Information.  But this requirement does not apply
+if neither you nor any third party retains the ability to install
+modified object code on the User Product (for example, the work has
+been installed in ROM).
+
+  The requirement to provide Installation Information does not include a
+requirement to continue to provide support service, warranty, or updates
+for a work that has been modified or installed by the recipient, or for
+the User Product in which it has been modified or installed.  Access to a
+network may be denied when the modification itself materially and
+adversely affects the operation of the network or violates the rules and
+protocols for communication across the network.
+
+  Corresponding Source conveyed, and Installation Information provided,
+in accord with this section must be in a format that is publicly
+documented (and with an implementation available to the public in
+source code form), and must require no special password or key for
+unpacking, reading or copying.
+
+  7. Additional Terms.
+
+  "Additional permissions" are terms that supplement the terms of this
+License by making exceptions from one or more of its conditions.
+Additional permissions that are applicable to the entire Program shall
+be treated as though they were included in this License, to the extent
+that they are valid under applicable law.  If additional permissions
+apply only to part of the Program, that part may be used separately
+under those permissions, but the entire Program remains governed by
+this License without regard to the additional permissions.
+
+  When you convey a copy of a covered work, you may at your option
+remove any additional permissions from that copy, or from any part of
+it.  (Additional permissions may be written to require their own
+removal in certain cases when you modify the work.)  You may place
+additional permissions on material, added by you to a covered work,
+for which you have or can give appropriate copyright permission.
+
+  Notwithstanding any other provision of this License, for material you
+add to a covered work, you may (if authorized by the copyright holders of
+that material) supplement the terms of this License with terms:
+
+    a) Disclaiming warranty or limiting liability differently from the
+    terms of sections 15 and 16 of this License; or
+
+    b) Requiring preservation of specified reasonable legal notices or
+    author attributions in that material or in the Appropriate Legal
+    Notices displayed by works containing it; or
+
+    c) Prohibiting misrepresentation of the origin of that material, or
+    requiring that modified versions of such material be marked in
+    reasonable ways as different from the original version; or
+
+    d) Limiting the use for publicity purposes of names of licensors or
+    authors of the material; or
+
+    e) Declining to grant rights under trademark law for use of some
+    trade names, trademarks, or service marks; or
+
+    f) Requiring indemnification of licensors and authors of that
+    material by anyone who conveys the material (or modified versions of
+    it) with contractual assumptions of liability to the recipient, for
+    any liability that these contractual assumptions directly impose on
+    those licensors and authors.
+
+  All other non-permissive additional terms are considered "further
+restrictions" within the meaning of section 10.  If the Program as you
+received it, or any part of it, contains a notice stating that it is
+governed by this License along with a term that is a further
+restriction, you may remove that term.  If a license document contains
+a further restriction but permits relicensing or conveying under this
+License, you may add to a covered work material governed by the terms
+of that license document, provided that the further restriction does
+not survive such relicensing or conveying.
+
+  If you add terms to a covered work in accord with this section, you
+must place, in the relevant source files, a statement of the
+additional terms that apply to those files, or a notice indicating
+where to find the applicable terms.
+
+  Additional terms, permissive or non-permissive, may be stated in the
+form of a separately written license, or stated as exceptions;
+the above requirements apply either way.
+
+  8. Termination.
+
+  You may not propagate or modify a covered work except as expressly
+provided under this License.  Any attempt otherwise to propagate or
+modify it is void, and will automatically terminate your rights under
+this License (including any patent licenses granted under the third
+paragraph of section 11).
+
+  However, if you cease all violation of this License, then your
+license from a particular copyright holder is reinstated (a)
+provisionally, unless and until the copyright holder explicitly and
+finally terminates your license, and (b) permanently, if the copyright
+holder fails to notify you of the violation by some reasonable means
+prior to 60 days after the cessation.
+
+  Moreover, your license from a particular copyright holder is
+reinstated permanently if the copyright holder notifies you of the
+violation by some reasonable means, this is the first time you have
+received notice of violation of this License (for any work) from that
+copyright holder, and you cure the violation prior to 30 days after
+your receipt of the notice.
+
+  Termination of your rights under this section does not terminate the
+licenses of parties who have received copies or rights from you under
+this License.  If your rights have been terminated and not permanently
+reinstated, you do not qualify to receive new licenses for the same
+material under section 10.
+
+  9. Acceptance Not Required for Having Copies.
+
+  You are not required to accept this License in order to receive or
+run a copy of the Program.  Ancillary propagation of a covered work
+occurring solely as a consequence of using peer-to-peer transmission
+to receive a copy likewise does not require acceptance.  However,
+nothing other than this License grants you permission to propagate or
+modify any covered work.  These actions infringe copyright if you do
+not accept this License.  Therefore, by modifying or propagating a
+covered work, you indicate your acceptance of this License to do so.
+
+  10. Automatic Licensing of Downstream Recipients.
+
+  Each time you convey a covered work, the recipient automatically
+receives a license from the original licensors, to run, modify and
+propagate that work, subject to this License.  You are not responsible
+for enforcing compliance by third parties with this License.
+
+  An "entity transaction" is a transaction transferring control of an
+organization, or substantially all assets of one, or subdividing an
+organization, or merging organizations.  If propagation of a covered
+work results from an entity transaction, each party to that
+transaction who receives a copy of the work also receives whatever
+licenses to the work the party's predecessor in interest had or could
+give under the previous paragraph, plus a right to possession of the
+Corresponding Source of the work from the predecessor in interest, if
+the predecessor has it or can get it with reasonable efforts.
+
+  You may not impose any further restrictions on the exercise of the
+rights granted or affirmed under this License.  For example, you may
+not impose a license fee, royalty, or other charge for exercise of
+rights granted under this License, and you may not initiate litigation
+(including a cross-claim or counterclaim in a lawsuit) alleging that
+any patent claim is infringed by making, using, selling, offering for
+sale, or importing the Program or any portion of it.
+
+  11. Patents.
+
+  A "contributor" is a copyright holder who authorizes use under this
+License of the Program or a work on which the Program is based.  The
+work thus licensed is called the contributor's "contributor version".
+
+  A contributor's "essential patent claims" are all patent claims
+owned or controlled by the contributor, whether already acquired or
+hereafter acquired, that would be infringed by some manner, permitted
+by this License, of making, using, or selling its contributor version,
+but do not include claims that would be infringed only as a
+consequence of further modification of the contributor version.  For
+purposes of this definition, "control" includes the right to grant
+patent sublicenses in a manner consistent with the requirements of
+this License.
+
+  Each contributor grants you a non-exclusive, worldwide, royalty-free
+patent license under the contributor's essential patent claims, to
+make, use, sell, offer for sale, import and otherwise run, modify and
+propagate the contents of its contributor version.
+
+  In the following three paragraphs, a "patent license" is any express
+agreement or commitment, however denominated, not to enforce a patent
+(such as an express permission to practice a patent or covenant not to
+sue for patent infringement).  To "grant" such a patent license to a
+party means to make such an agreement or commitment not to enforce a
+patent against the party.
+
+  If you convey a covered work, knowingly relying on a patent license,
+and the Corresponding Source of the work is not available for anyone
+to copy, free of charge and under the terms of this License, through a
+publicly available network server or other readily accessible means,
+then you must either (1) cause the Corresponding Source to be so
+available, or (2) arrange to deprive yourself of the benefit of the
+patent license for this particular work, or (3) arrange, in a manner
+consistent with the requirements of this License, to extend the patent
+license to downstream recipients.  "Knowingly relying" means you have
+actual knowledge that, but for the patent license, your conveying the
+covered work in a country, or your recipient's use of the covered work
+in a country, would infringe one or more identifiable patents in that
+country that you have reason to believe are valid.
+
+  If, pursuant to or in connection with a single transaction or
+arrangement, you convey, or propagate by procuring conveyance of, a
+covered work, and grant a patent license to some of the parties
+receiving the covered work authorizing them to use, propagate, modify
+or convey a specific copy of the covered work, then the patent license
+you grant is automatically extended to all recipients of the covered
+work and works based on it.
+
+  A patent license is "discriminatory" if it does not include within
+the scope of its coverage, prohibits the exercise of, or is
+conditioned on the non-exercise of one or more of the rights that are
+specifically granted under this License.  You may not convey a covered
+work if you are a party to an arrangement with a third party that is
+in the business of distributing software, under which you make payment
+to the third party based on the extent of your activity of conveying
+the work, and under which the third party grants, to any of the
+parties who would receive the covered work from you, a discriminatory
+patent license (a) in connection with copies of the covered work
+conveyed by you (or copies made from those copies), or (b) primarily
+for and in connection with specific products or compilations that
+contain the covered work, unless you entered into that arrangement,
+or that patent license was granted, prior to 28 March 2007.
+
+  Nothing in this License shall be construed as excluding or limiting
+any implied license or other defenses to infringement that may
+otherwise be available to you under applicable patent law.
+
+  12. No Surrender of Others' Freedom.
+
+  If conditions are imposed on you (whether by court order, agreement or
+otherwise) that contradict the conditions of this License, they do not
+excuse you from the conditions of this License.  If you cannot convey a
+covered work so as to satisfy simultaneously your obligations under this
+License and any other pertinent obligations, then as a consequence you may
+not convey it at all.  For example, if you agree to terms that obligate you
+to collect a royalty for further conveying from those to whom you convey
+the Program, the only way you could satisfy both those terms and this
+License would be to refrain entirely from conveying the Program.
+
+  13. Remote Network Interaction; Use with the GNU General Public License.
+
+  Notwithstanding any other provision of this License, if you modify the
+Program, your modified version must prominently offer all users
+interacting with it remotely through a computer network (if your version
+supports such interaction) an opportunity to receive the Corresponding
+Source of your version by providing access to the Corresponding Source
+from a network server at no charge, through some standard or customary
+means of facilitating copying of software.  This Corresponding Source
+shall include the Corresponding Source for any work covered by version 3
+of the GNU General Public License that is incorporated pursuant to the
+following paragraph.
+
+  Notwithstanding any other provision of this License, you have
+permission to link or combine any covered work with a work licensed
+under version 3 of the GNU General Public License into a single
+combined work, and to convey the resulting work.  The terms of this
+License will continue to apply to the part which is the covered work,
+but the work with which it is combined will remain governed by version
+3 of the GNU General Public License.
+
+  14. Revised Versions of this License.
+
+  The Free Software Foundation may publish revised and/or new versions of
+the GNU Affero General Public License from time to time.  Such new versions
+will be similar in spirit to the present version, but may differ in detail to
+address new problems or concerns.
+
+  Each version is given a distinguishing version number.  If the
+Program specifies that a certain numbered version of the GNU Affero General
+Public License "or any later version" applies to it, you have the
+option of following the terms and conditions either of that numbered
+version or of any later version published by the Free Software
+Foundation.  If the Program does not specify a version number of the
+GNU Affero General Public License, you may choose any version ever published
+by the Free Software Foundation.
+
+  If the Program specifies that a proxy can decide which future
+versions of the GNU Affero General Public License can be used, that proxy's
+public statement of acceptance of a version permanently authorizes you
+to choose that version for the Program.
+
+  Later license versions may give you additional or different
+permissions.  However, no additional obligations are imposed on any
+author or copyright holder as a result of your choosing to follow a
+later version.
+
+  15. Disclaimer of Warranty.
+
+  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
+APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
+HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
+OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
+IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
+ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+
+  16. Limitation of Liability.
+
+  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If your software can interact with users remotely through a computer
+network, you should also make sure that it provides a way for users to
+get its source.  For example, if your program is a web application, its
+interface could display a "Source" link that leads users to an archive
+of the code.  There are many ways you could offer source, and different
+solutions will be better for different programs; see section 13 for the
+specific requirements.
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU AGPL, see
+<http://www.gnu.org/licenses/>.
+

packages/xo-collection/README.md

@@ -0,0 +1,265 @@
+# xo-collection [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> Generic in-memory collection with events
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-collection):
+
+```
+> npm install --save xo-collection
+```
+
+## Usage
+
+```javascript
+var Collection = require('xo-collection')
+```
+
+### Creation
+
+```javascript
+// Creates a new collection.
+var col = new Collection()
+```
+
+### Manipulation
+
+**Inserting a new item**
+
+```javascript
+col.add('foo', true)
+```
+
+- **Throws** `DuplicateItem` if the item is already in the collection.
+
+**Updating an existing item**
+
+```javascript
+col.update('foo', false)
+```
+
+- **Throws** `NoSuchItem` if the item is not in the collection.
+
+**Inserting or updating an item**
+
+```javascript
+col.set('bar', true)
+```
+
+**Notifying an external update**
+
+> If an item is an object, it can be updated directly without using
+> the `set`/`update` methods.
+>
+> To make sure the collection stays in sync and the correct events are
+> sent, the `touch` method can be used to notify the change.
+
+```javascript
+var baz = {}
+
+col.add('baz', baz)
+
+baz.prop = true
+col.touch('baz')
+```
+
+> Because this is a much used pattern, `touch` returns the item to
+> allow its direct modification.
+
+```javascript
+col.touch('baz').prop = false
+```
+
+- **Throws** `NoSuchItem` if the item is not in the collection.
+- **Throws** `IllegalTouch` if the item is not an object.
+
+**Removing an existing item**
+
+```javascript
+col.remove('bar')
+```
+
+- **Throws** `NoSuchItem` if the item is not in the collection.
+
+**Removing an item without error**
+
+This is the symmetric method of `set()`: it removes the item if it
+exists otherwise does nothing.
+
+```javascript
+col.unset('bar')
+```
+
+**Removing all items**
+
+```javascript
+col.clear()
+```
+
+### Query
+
+**Checking the existence of an item**
+
+```javascript
+var hasBar = col.has('bar')
+```
+
+**Getting an existing item**
+
+```javascript
+var foo = col.get('foo')
+
+// The second parameter can be used to specify a fallback in case the
+// item does not exist.
+var bar = col.get('bar', 6.28)
+```
+
+- **Throws** `NoSuchItem` if the item is not in the collection and no
+  fallback has been passed.
+
+**Getting a read-only view of the collection**
+
+> This property is useful for example to iterate over the collection
+> or to make advanced queries with the help of utility libraries such
+> as lodash.
+
+```javascript
+var _ = require('lodash')
+
+// Prints all the items.
+_.forEach(col.all, function (value, key) {
+  console.log('- %s: %j', key, value)
+})
+
+// Finds all the items which are objects and have a property
+// `active` which equals `true`.
+var results = _.where(col.all, { active: true })
+```
+
+**Getting the number of items**
+
+```javascript
+var size = col.size
+```
+
+### Events
+
+> The events are emitted asynchronously (at the next turn/tick of the
+> event loop) and are deduplicated which means, for instance, that an
+> addition followed by an update will result only in a single
+> addition.
+
+**New items**
+
+```javascript
+col.on('add', (added) => {
+  forEach(added, (value, key) => {
+    console.log('+ %s: %j', key, value)
+  })
+})
+```
+
+**Updated items**
+
+```javascript
+col.on('update', (updated) => {
+  forEach(updated, (value, key) => {
+    console.log('± %s: %j', key, value)
+  })
+})
+```
+
+**Removed items**
+
+```javascript
+col.on('remove', (removed) => {
+  // For consistency, `removed` is also a map but contrary to `added`
+  // and `updated`, the values associated to the keys are not
+  // significant since the items have already be removed.
+
+  forEach(removed, (value, key) => {
+    console.log('- %s', key)
+  })
+})
+```
+
+**End of update**
+
+> Emitted when all the update process is finished and all the update
+> events has been emitted.
+
+```javascript
+col.on('finish', () => {
+  console.log('the collection has been updated')
+})
+```
+
+### Iteration
+
+```javascript
+for (const [key, value] of col) {
+  console.log('- %s: %j', key, value)
+}
+
+for (const key of col.keys()) {
+  console.log('- %s', key)
+}
+
+for (const value of col.values()) {
+  console.log('- %j', value)
+}
+```
+
+### Views
+
+```javascript
+const View = require('xo-collection/view')
+```
+
+> A view is a read-only collection which contains only the items of a
+> parent collection which satisfy a predicate.
+>
+> It is updated at most once per turn of the event loop and therefore
+> can be briefly invalid.
+
+```javascript
+const myView = new View(parentCollection, function predicate (value, key) {
+  // This function should return a boolean indicating whether the
+  // current item should be in this view.
+})
+```
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+ISC © [Vates SAS](http://vates.fr)

packages/xo-collection/index.js

@@ -0,0 +1 @@
+module.exports = require('./dist/index')

packages/xo-collection/package.json

@@ -0,0 +1,86 @@
+{
+  "name": "xo-collection",
+  "version": "0.4.1",
+  "license": "ISC",
+  "description": "Generic in-memory collection with events",
+  "keywords": [],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-collection",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Fabrice Marsaud",
+    "email": "fabrice.marsaud@vates.fr"
+  },
+  "preferGlobal": false,
+  "main": "dist/collection",
+  "bin": {},
+  "files": [
+    "dist/",
+    "*.js"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.18.0",
+    "kindof": "^2.0.0",
+    "lodash": "^4.17.2",
+    "make-error": "^1.0.2"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.18.0",
+    "babel-eslint": "^7.1.0",
+    "babel-plugin-lodash": "^3.2.11",
+    "babel-plugin-transform-runtime": "^6.15.0",
+    "babel-preset-env": "^1.1.8",
+    "babel-preset-stage-3": "^6.17.0",
+    "cross-env": "^3.1.4",
+    "dependency-check": "^2.7.0",
+    "event-to-promise": "^0.7.0",
+    "jest": "^18.1.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.6.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "dev-test": "jest --bail --watch",
+    "posttest": "standard && dependency-check ./package.json --entry dist/collection.js index.js unique-index.js view.js",
+    "prebuild": "rimraf dist/",
+    "predev": "yarn run prebuild",
+    "prepublish": "yarn run build",
+    "test": "jest"
+  },
+  "babel": {
+    "plugins": [
+      "lodash",
+      "transform-runtime"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "node": 4
+          }
+        }
+      ],
+      "stage-3"
+    ]
+  },
+  "jest": {
+    "testPathDirs": [
+      "<rootDir>/src"
+    ],
+    "testRegex": "\\.spec\\.js$"
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-collection/src/clear-object.js

@@ -0,0 +1,5 @@
+export default function clearObject (object) {
+  for (const key in object) {
+    delete object[key]
+  }
+}

packages/xo-collection/src/collection.js

@@ -0,0 +1,363 @@
+import kindOf from 'kindof'
+import {BaseError} from 'make-error'
+import {EventEmitter} from 'events'
+import {forEach} from 'lodash'
+
+import isEmpty from './is-empty'
+import isObject from './is-object'
+
+// ===================================================================
+
+const {
+  create: createObject,
+  prototype: { hasOwnProperty }
+} = Object
+
+export const ACTION_ADD = 'add'
+export const ACTION_UPDATE = 'update'
+export const ACTION_REMOVE = 'remove'
+
+// ===================================================================
+
+export class BufferAlreadyFlushed extends BaseError {
+  constructor () {
+    super('buffer flush already requested')
+  }
+}
+
+export class DuplicateIndex extends BaseError {
+  constructor (name) {
+    super('there is already an index with the name ' + name)
+  }
+}
+
+export class DuplicateItem extends BaseError {
+  constructor (key) {
+    super('there is already a item with the key ' + key)
+  }
+}
+
+export class IllegalTouch extends BaseError {
+  constructor (value) {
+    super('only an object value can be touched (found a ' + kindOf(value) + ')')
+  }
+}
+
+export class InvalidKey extends BaseError {
+  constructor (key) {
+    super('invalid key of type ' + kindOf(key))
+  }
+}
+
+export class NoSuchIndex extends BaseError {
+  constructor (name) {
+    super('there is no index with the name ' + name)
+  }
+}
+
+export class NoSuchItem extends BaseError {
+  constructor (key) {
+    super('there is no item with the key ' + key)
+  }
+}
+
+// -------------------------------------------------------------------
+
+export default class Collection extends EventEmitter {
+  constructor () {
+    super()
+
+    this._buffer = createObject(null)
+    this._buffering = 0
+    this._indexes = createObject(null)
+    this._indexedItems = createObject(null)
+    this._items = {} // createObject(null)
+    this._size = 0
+  }
+
+  // Overridable method used to compute the key of an item when
+  // unspecified.
+  //
+  // Default implementation returns the `id` property.
+  getKey (value) {
+    return value && value.id
+  }
+
+  // -----------------------------------------------------------------
+  // Properties
+  // -----------------------------------------------------------------
+
+  get all () {
+    return this._items
+  }
+
+  get indexes () {
+    return this._indexedItems
+  }
+
+  get size () {
+    return this._size
+  }
+
+  // -----------------------------------------------------------------
+  // Manipulation
+  // -----------------------------------------------------------------
+
+  add (keyOrObjectWithId, valueIfKey = undefined) {
+    const [key, value] = this._resolveItem(keyOrObjectWithId, valueIfKey)
+    this._assertHasNot(key)
+
+    this._items[key] = value
+    this._size++
+    this._touch(ACTION_ADD, key)
+  }
+
+  clear () {
+    forEach(this._items, (_, key) => this._remove(key))
+  }
+
+  remove (keyOrObjectWithId) {
+    const [key] = this._resolveItem(keyOrObjectWithId)
+    this._assertHas(key)
+
+    this._remove(key)
+  }
+
+  set (keyOrObjectWithId, valueIfKey = undefined) {
+    const [key, value] = this._resolveItem(keyOrObjectWithId, valueIfKey)
+
+    const action = this.has(key) ? ACTION_UPDATE : ACTION_ADD
+    this._items[key] = value
+    if (action === ACTION_ADD) {
+      this._size++
+    }
+    this._touch(action, key)
+  }
+
+  touch (keyOrObjectWithId) {
+    const [key] = this._resolveItem(keyOrObjectWithId)
+    this._assertHas(key)
+    const value = this.get(key)
+    if (!isObject(value)) {
+      throw new IllegalTouch(value)
+    }
+
+    this._touch(ACTION_UPDATE, key)
+
+    return this.get(key)
+  }
+
+  unset (keyOrObjectWithId) {
+    const [key] = this._resolveItem(keyOrObjectWithId)
+
+    if (this.has(key)) {
+      this._remove(key)
+    }
+  }
+
+  update (keyOrObjectWithId, valueIfKey = undefined) {
+    const [key, value] = this._resolveItem(keyOrObjectWithId, valueIfKey)
+    this._assertHas(key)
+
+    this._items[key] = value
+    this._touch(ACTION_UPDATE, key)
+  }
+
+  // -----------------------------------------------------------------
+  // Query
+  // -----------------------------------------------------------------
+
+  get (key, defaultValue) {
+    if (this.has(key)) {
+      return this._items[key]
+    }
+
+    if (arguments.length > 1) {
+      return defaultValue
+    }
+
+    // Throws a NoSuchItem.
+    this._assertHas(key)
+  }
+
+  has (key) {
+    return hasOwnProperty.call(this._items, key)
+  }
+
+  // -----------------------------------------------------------------
+  // Indexes
+  // -----------------------------------------------------------------
+
+  createIndex (name, index) {
+    const {_indexes: indexes} = this
+    if (hasOwnProperty.call(indexes, name)) {
+      throw new DuplicateIndex(name)
+    }
+
+    indexes[name] = index
+    this._indexedItems[name] = index.items
+
+    index._attachCollection(this)
+  }
+
+  deleteIndex (name) {
+    const {_indexes: indexes} = this
+    if (!hasOwnProperty.call(indexes, name)) {
+      throw new NoSuchIndex(name)
+    }
+
+    const index = indexes[name]
+    delete indexes[name]
+    delete this._indexedItems[name]
+
+    index._detachCollection(this)
+  }
+
+  // -----------------------------------------------------------------
+  // Iteration
+  // -----------------------------------------------------------------
+
+  * [Symbol.iterator] () {
+    const {_items: items} = this
+
+    for (const key in items) {
+      yield [key, items[key]]
+    }
+  }
+
+  * keys () {
+    const {_items: items} = this
+
+    for (const key in items) {
+      yield key
+    }
+  }
+
+  * values () {
+    const {_items: items} = this
+
+    for (const key in items) {
+      yield items[key]
+    }
+  }
+
+  // -----------------------------------------------------------------
+  // Events buffering
+  // -----------------------------------------------------------------
+
+  bufferEvents () {
+    ++this._buffering
+
+    let called = false
+    return () => {
+      if (called) {
+        throw new BufferAlreadyFlushed()
+      }
+      called = true
+
+      if (--this._buffering) {
+        return
+      }
+
+      const {_buffer: buffer} = this
+
+      // Due to deduplication there could be nothing in the buffer.
+      if (isEmpty(buffer)) {
+        return
+      }
+
+      const data = {
+        add: createObject(null),
+        remove: createObject(null),
+        update: createObject(null)
+      }
+
+      for (const key in this._buffer) {
+        data[buffer[key]][key] = this._items[key]
+      }
+
+      forEach(data, (items, action) => {
+        if (!isEmpty(items)) {
+          this.emit(action, items)
+        }
+      })
+
+      // Indicates the end of the update.
+      //
+      // This name has been chosen because it is used in Node writable
+      // streams when the data has been successfully committed.
+      this.emit('finish')
+
+      this._buffer = createObject(null)
+    }
+  }
+
+  // =================================================================
+
+  _assertHas (key) {
+    if (!this.has(key)) {
+      throw new NoSuchItem(key)
+    }
+  }
+
+  _assertHasNot (key) {
+    if (this.has(key)) {
+      throw new DuplicateItem(key)
+    }
+  }
+
+  _assertValidKey (key) {
+    if (!this._isValidKey(key)) {
+      throw new InvalidKey(key)
+    }
+  }
+
+  _isValidKey (key) {
+    return typeof key === 'number' || typeof key === 'string'
+  }
+
+  _remove (key) {
+    delete this._items[key]
+    this._size--
+    this._touch(ACTION_REMOVE, key)
+  }
+
+  _resolveItem (keyOrObjectWithId, valueIfKey = undefined) {
+    if (valueIfKey !== undefined) {
+      this._assertValidKey(keyOrObjectWithId)
+
+      return [keyOrObjectWithId, valueIfKey]
+    }
+
+    if (this._isValidKey(keyOrObjectWithId)) {
+      return [keyOrObjectWithId]
+    }
+
+    const key = this.getKey(keyOrObjectWithId)
+    this._assertValidKey(key)
+
+    return [key, keyOrObjectWithId]
+  }
+
+  _touch (action, key) {
+    if (this._buffering === 0) {
+      const flush = this.bufferEvents()
+
+      process.nextTick(flush)
+    }
+
+    if (action === ACTION_ADD) {
+      this._buffer[key] = this._buffer[key] ? ACTION_UPDATE : ACTION_ADD
+    } else if (action === ACTION_REMOVE) {
+      if (this._buffer[key] === ACTION_ADD) {
+        delete this._buffer[key]
+      } else {
+        this._buffer[key] = ACTION_REMOVE
+      }
+    } else { // update
+      if (!this._buffer[key]) {
+        this._buffer[key] = ACTION_UPDATE
+      }
+    }
+  }
+}

packages/xo-collection/src/collection.spec.js

@@ -0,0 +1,341 @@
+/* eslint-env jest */
+
+import eventToPromise from 'event-to-promise'
+import { forEach } from 'lodash'
+
+import Collection, {DuplicateItem, NoSuchItem} from '..'
+
+// ===================================================================
+
+function waitTicks (n = 2) {
+  const {nextTick} = process
+
+  return new Promise(function (resolve) {
+    (function waitNextTick () {
+      // The first tick is handled by Promise#then()
+      if (--n) {
+        nextTick(waitNextTick)
+      } else {
+        resolve()
+      }
+    })()
+  })
+}
+
+describe('Collection', function () {
+  beforeEach(function () {
+    this.col = new Collection()
+    this.col.add('bar', 0)
+
+    return waitTicks()
+  })
+
+  it('is iterable', function () {
+    const iterator = this.col[Symbol.iterator]()
+
+    expect(iterator.next()).toEqual({done: false, value: ['bar', 0]})
+    expect(iterator.next()).toEqual({done: true, value: undefined})
+  })
+
+  describe('#keys()', function () {
+    it('returns an iterator over the keys', function () {
+      const iterator = this.col.keys()
+
+      expect(iterator.next()).toEqual({done: false, value: 'bar'})
+      expect(iterator.next()).toEqual({done: true, value: undefined})
+    })
+  })
+
+  describe('#values()', function () {
+    it('returns an iterator over the values', function () {
+      const iterator = this.col.values()
+
+      expect(iterator.next()).toEqual({done: false, value: 0})
+      expect(iterator.next()).toEqual({done: true, value: undefined})
+    })
+  })
+
+  describe('#add()', function () {
+    it('adds item to the collection', function () {
+      const spy = jest.fn()
+      this.col.on('add', spy)
+
+      this.col.add('foo', true)
+
+      expect(this.col.get('foo')).toBe(true)
+
+      // No sync events.
+      expect(spy).not.toHaveBeenCalled()
+
+      // Async event.
+      return eventToPromise(this.col, 'add').then(function (added) {
+        expect(Object.keys(added)).toEqual([ 'foo' ])
+        expect(added.foo).toBe(true)
+      })
+    })
+
+    it('throws an exception if the item already exists', function () {
+      expect(() => this.col.add('bar', true)).toThrowError(DuplicateItem)
+    })
+
+    it('accepts an object with an id property', function () {
+      const foo = { id: 'foo' }
+
+      this.col.add(foo)
+
+      expect(this.col.get(foo.id)).toBe(foo)
+    })
+  })
+
+  describe('#update()', function () {
+    it('updates an item of the collection', function () {
+      const spy = jest.fn()
+      this.col.on('update', spy)
+
+      this.col.update('bar', 1)
+      expect(this.col.get('bar')).toBe(1) // Will be forgotten by de-duplication
+      this.col.update('bar', 2)
+      expect(this.col.get('bar')).toBe(2)
+
+      // No sync events.
+      expect(spy).not.toHaveBeenCalled()
+
+      // Async event.
+      return eventToPromise(this.col, 'update').then(function (updated) {
+        expect(Object.keys(updated)).toEqual(['bar'])
+        expect(updated.bar).toBe(2)
+      })
+    })
+
+    it('throws an exception if the item does not exist', function () {
+      expect(() => this.col.update('baz', true)).toThrowError(NoSuchItem)
+    })
+
+    it('accepts an object with an id property', function () {
+      const bar = { id: 'bar' }
+
+      this.col.update(bar)
+
+      expect(this.col.get(bar.id)).toBe(bar)
+    })
+  })
+
+  describe('#remove()', function () {
+    it('removes an item of the collection', function () {
+      const spy = jest.fn()
+      this.col.on('remove', spy)
+
+      this.col.update('bar', 1)
+      expect(this.col.get('bar')).toBe(1) // Will be forgotten by de-duplication
+      this.col.remove('bar')
+
+      // No sync events.
+      expect(spy).not.toHaveBeenCalled()
+
+      // Async event.
+      return eventToPromise(this.col, 'remove').then(function (removed) {
+        expect(Object.keys(removed)).toEqual(['bar'])
+        expect(removed.bar).toBeUndefined()
+      })
+    })
+
+    it('throws an exception if the item does not exist', function () {
+      expect(() => this.col.remove('baz', true)).toThrowError(NoSuchItem)
+    })
+
+    it('accepts an object with an id property', function () {
+      const bar = { id: 'bar' }
+
+      this.col.remove(bar)
+
+      expect(this.col.has(bar.id)).toBe(false)
+    })
+  })
+
+  describe('#set()', function () {
+    it('adds item if collection has not key', function () {
+      const spy = jest.fn()
+      this.col.on('add', spy)
+
+      this.col.set('foo', true)
+
+      expect(this.col.get('foo')).toBe(true)
+
+      // No sync events.
+      expect(spy).not.toHaveBeenCalled()
+
+      // Async events.
+      return eventToPromise(this.col, 'add').then(function (added) {
+        expect(Object.keys(added)).toEqual(['foo'])
+        expect(added.foo).toBe(true)
+      })
+    })
+
+    it('updates item if collection has key', function () {
+      const spy = jest.fn()
+      this.col.on('udpate', spy)
+
+      this.col.set('bar', 1)
+
+      expect(this.col.get('bar')).toBe(1)
+
+      // No sync events.
+      expect(spy).not.toHaveBeenCalled()
+
+      // Async events.
+      return eventToPromise(this.col, 'update').then(function (updated) {
+        expect(Object.keys(updated)).toEqual(['bar'])
+        expect(updated.bar).toBe(1)
+      })
+    })
+
+    it('accepts an object with an id property', function () {
+      const foo = { id: 'foo' }
+
+      this.col.set(foo)
+
+      expect(this.col.get(foo.id)).toBe(foo)
+    })
+  })
+
+  describe('#unset()', function () {
+    it('removes an existing item', function () {
+      this.col.unset('bar')
+
+      expect(this.col.has('bar')).toBe(false)
+
+      return eventToPromise(this.col, 'remove').then(function (removed) {
+        expect(Object.keys(removed)).toEqual(['bar'])
+        expect(removed.bar).toBeUndefined()
+      })
+    })
+
+    it('does not throw if the item does not exists', function () {
+      this.col.unset('foo')
+    })
+
+    it('accepts an object with an id property', function () {
+      this.col.unset({id: 'bar'})
+
+      expect(this.col.has('bar')).toBe(false)
+
+      return eventToPromise(this.col, 'remove').then(function (removed) {
+        expect(Object.keys(removed)).toEqual(['bar'])
+        expect(removed.bar).toBeUndefined()
+      })
+    })
+  })
+
+  describe('touch()', function () {
+    it('can be used to signal an indirect update', function () {
+      const foo = { id: 'foo' }
+      this.col.add(foo)
+
+      return waitTicks().then(() => {
+        this.col.touch(foo)
+
+        return eventToPromise(this.col, 'update', (items) => {
+          expect(Object.keys(items)).toEqual(['foo'])
+          expect(items.foo).toBe(foo)
+        })
+      })
+    })
+  })
+
+  describe('clear()', function () {
+    it('removes all items from the collection', function () {
+      this.col.clear()
+
+      expect(this.col.size).toBe(0)
+
+      return eventToPromise(this.col, 'remove').then((items) => {
+        expect(Object.keys(items)).toEqual(['bar'])
+        expect(items.bar).toBeUndefined()
+      })
+    })
+  })
+
+  describe('deduplicates events', function () {
+    forEach({
+      'add & update → add': [
+        [
+          ['add', 'foo', 0],
+          ['update', 'foo', 1]
+        ],
+        {
+          add: {
+            foo: 1
+          }
+        }
+      ],
+
+      'add & remove → ∅': [
+        [
+          ['add', 'foo', 0],
+          ['remove', 'foo']
+        ],
+        {}
+      ],
+
+      'update & update → update': [
+        [
+          ['update', 'bar', 1],
+          ['update', 'bar', 2]
+        ],
+        {
+          update: {
+            bar: 2
+          }
+        }
+      ],
+
+      'update & remove → remove': [
+        [
+          ['update', 'bar', 1],
+          ['remove', 'bar']
+        ],
+        {
+          remove: {
+            bar: undefined
+          }
+        }
+      ],
+
+      'remove & add → update': [
+        [
+          ['remove', 'bar'],
+          ['add', 'bar', 0]
+        ],
+        {
+          update: {
+            bar: 0
+          }
+        }
+      ]
+    }, ([operations, results], label) => {
+      it(label, function () {
+        const {col} = this
+
+        forEach(operations, ([method, ...args]) => {
+          col[method](...args)
+        })
+
+        const spies = Object.create(null)
+        forEach(['add', 'update', 'remove'], event => {
+          col.on(event, (spies[event] = jest.fn()))
+        })
+
+        return waitTicks().then(() => {
+          forEach(spies, (spy, event) => {
+            const items = results[event]
+            if (items) {
+              expect(spy.mock.calls).toEqual([ [ items ] ])
+            } else {
+              expect(spy).not.toHaveBeenCalled()
+            }
+          })
+        })
+      })
+    })
+  })
+})

packages/xo-collection/src/index.js

@@ -0,0 +1,149 @@
+import { bind, iteratee } from 'lodash'
+
+import clearObject from './clear-object'
+import isEmpty from './is-empty'
+import NotImplemented from './not-implemented'
+import {
+  ACTION_ADD,
+  ACTION_UPDATE,
+  ACTION_REMOVE
+} from './collection'
+
+// ===================================================================
+
+export default class Index {
+  constructor (computeHash) {
+    if (computeHash) {
+      this.computeHash = iteratee(computeHash)
+    }
+
+    this._itemsByHash = Object.create(null)
+    this._keysToHash = Object.create(null)
+
+    // Bound versions of listeners.
+    this._onAdd = bind(this._onAdd, this)
+    this._onUpdate = bind(this._onUpdate, this)
+    this._onRemove = bind(this._onRemove, this)
+  }
+
+  // This method is used to compute the hash under which an item must
+  // be saved.
+  computeHash (value, key) {
+    throw new NotImplemented('this method must be overridden')
+  }
+
+  // Remove empty items lists.
+  sweep () {
+    const {_itemsByHash: itemsByHash} = this
+    for (const hash in itemsByHash) {
+      if (isEmpty(itemsByHash[hash])) {
+        delete itemsByHash[hash]
+      }
+    }
+  }
+
+  // -----------------------------------------------------------------
+
+  get items () {
+    return this._itemsByHash
+  }
+
+  // -----------------------------------------------------------------
+
+  _attachCollection (collection) {
+    // Add existing entries.
+    //
+    // FIXME: I think there may be a race condition if the `add` event
+    // has not been emitted yet.
+    this._onAdd(collection.all)
+
+    collection.on(ACTION_ADD, this._onAdd)
+    collection.on(ACTION_UPDATE, this._onUpdate)
+    collection.on(ACTION_REMOVE, this._onRemove)
+  }
+
+  _detachCollection (collection) {
+    collection.removeListener(ACTION_ADD, this._onAdd)
+    collection.removeListener(ACTION_UPDATE, this._onUpdate)
+    collection.removeListener(ACTION_REMOVE, this._onRemove)
+
+    clearObject(this._itemsByHash)
+    clearObject(this._keysToHash)
+  }
+
+  // -----------------------------------------------------------------
+
+  _onAdd (items) {
+    const {
+      computeHash,
+      _itemsByHash: itemsByHash,
+      _keysToHash: keysToHash
+    } = this
+
+    for (const key in items) {
+      const value = items[key]
+
+      const hash = computeHash(value, key)
+
+      if (hash != null) {
+        (
+          itemsByHash[hash] ||
+
+          // FIXME: We do not use objects without prototype for now
+          // because it breaks Angular in xo-web, change it back when
+          // this is fixed.
+          (itemsByHash[hash] = {})
+        )[key] = value
+
+        keysToHash[key] = hash
+      }
+    }
+  }
+
+  _onUpdate (items) {
+    const {
+      computeHash,
+      _itemsByHash: itemsByHash,
+      _keysToHash: keysToHash
+    } = this
+
+    for (const key in items) {
+      const value = items[key]
+
+      const prev = keysToHash[key]
+      const hash = computeHash(value, key)
+
+      // Removes item from the previous hash's list if any.
+      if (prev != null) delete itemsByHash[prev][key]
+
+      // Inserts item into the new hash's list if any.
+      if (hash != null) {
+        (
+          itemsByHash[hash] ||
+
+          // FIXME: idem: change back to Object.create(null)
+          (itemsByHash[hash] = {})
+        )[key] = value
+
+        keysToHash[key] = hash
+      } else {
+        delete keysToHash[key]
+      }
+    }
+  }
+
+  _onRemove (items) {
+    const {
+      _itemsByHash: itemsByHash,
+      _keysToHash: keysToHash
+    } = this
+
+    for (const key in items) {
+      const prev = keysToHash[key]
+      if (prev != null) {
+        delete itemsByHash[prev][key]
+        delete keysToHash[key]
+      }
+    }
+  }
+}

packages/xo-collection/src/index.spec.js

@@ -0,0 +1,180 @@
+/* eslint-env jest */
+
+import eventToPromise from 'event-to-promise'
+import { forEach } from 'lodash'
+
+import Collection from '..'
+import Index from '../index'
+
+// ===================================================================
+
+const waitTicks = (n = 2) => {
+  const {nextTick} = process
+
+  return new Promise(resolve => {
+    (function waitNextTick () {
+      // The first tick is handled by Promise#then()
+      if (--n) {
+        nextTick(waitNextTick)
+      } else {
+        resolve()
+      }
+    })()
+  })
+}
+
+// ===================================================================
+
+describe('Index', function () {
+  let col, byGroup
+  const item1 = {
+    id: '2ccb8a72-dc65-48e4-88fe-45ef541f2cba',
+    group: 'foo'
+  }
+  const item2 = {
+    id: '7d21dc51-4da8-4538-a2e9-dd6f4784eb76',
+    group: 'bar'
+  }
+  const item3 = {
+    id: '668c1274-4442-44a6-b99a-512188e0bb09',
+    group: 'foo'
+  }
+  const item4 = {
+    id: 'd90b7335-e540-4a44-ad22-c4baae9cd0a9'
+  }
+
+  beforeEach(function () {
+    col = new Collection()
+    forEach([item1, item2, item3, item4], item => {
+      col.add(item)
+    })
+
+    byGroup = new Index('group')
+
+    col.createIndex('byGroup', byGroup)
+
+    return waitTicks()
+  })
+
+  it('works with existing items', function () {
+    expect(col.indexes).toEqual({
+      byGroup: {
+        foo: {
+          [item1.id]: item1,
+          [item3.id]: item3
+        },
+        bar: {
+          [item2.id]: item2
+        }
+      }
+    })
+  })
+
+  it('works with added items', function () {
+    const item5 = {
+      id: '823b56c4-4b96-4f3a-9533-5d08177167ac',
+      group: 'baz'
+    }
+
+    col.add(item5)
+
+    return waitTicks().then(() => {
+      expect(col.indexes).toEqual({
+        byGroup: {
+          foo: {
+            [item1.id]: item1,
+            [item3.id]: item3
+          },
+          bar: {
+            [item2.id]: item2
+          },
+          baz: {
+            [item5.id]: item5
+          }
+        }
+      })
+    })
+  })
+
+  it('works with updated items', function () {
+    const item1bis = {
+      id: item1.id,
+      group: 'bar'
+    }
+
+    col.update(item1bis)
+
+    return waitTicks().then(() => {
+      expect(col.indexes).toEqual({
+        byGroup: {
+          foo: {
+            [item3.id]: item3
+          },
+          bar: {
+            [item1.id]: item1bis,
+            [item2.id]: item2
+          }
+        }
+      })
+    })
+  })
+
+  it('works with removed items', function () {
+    col.remove(item2)
+
+    return waitTicks().then(() => {
+      expect(col.indexes).toEqual({
+        byGroup: {
+          foo: {
+            [item1.id]: item1,
+            [item3.id]: item3
+          },
+          bar: {}
+        }
+      })
+    })
+  })
+
+  it('correctly updates the value even the same object has the same hash', function () {
+    const item1bis = {
+      id: item1.id,
+      group: item1.group,
+      newProp: true
+    }
+
+    col.update(item1bis)
+
+    return eventToPromise(col, 'finish').then(() => {
+      expect(col.indexes).toEqual({
+        byGroup: {
+          foo: {
+            [item1.id]: item1bis,
+            [item3.id]: item3
+          },
+          bar: {
+            [item2.id]: item2
+          }
+        }
+      })
+    })
+  })
+
+  describe('#sweep()', function () {
+    it('removes empty items lists', function () {
+      col.remove(item2)
+
+      return waitTicks().then(() => {
+        byGroup.sweep()
+
+        expect(col.indexes).toEqual({
+          byGroup: {
+            foo: {
+              [item1.id]: item1,
+              [item3.id]: item3
+            }
+          }
+        })
+      })
+    })
+  })
+})

packages/xo-collection/src/is-empty.js

@@ -0,0 +1,7 @@
+export default function isEmpty (object) {
+  /* eslint no-unused-vars: 0 */
+  for (const key in object) {
+    return false
+  }
+  return true
+}

packages/xo-collection/src/is-object.js

@@ -0,0 +1,3 @@
+export default function isObject (value) {
+  return (value !== null) && (typeof value === 'object')
+}

packages/xo-collection/src/not-implemented.js

@@ -0,0 +1,7 @@
+import {BaseError} from 'make-error'
+
+export default class NotImplemented extends BaseError {
+  constructor (message) {
+    super(message || 'this method is not implemented')
+  }
+}

packages/xo-collection/src/unique-index.js

@@ -0,0 +1,124 @@
+import { bind, iteratee } from 'lodash'
+
+import clearObject from './clear-object'
+import NotImplemented from './not-implemented'
+import {
+  ACTION_ADD,
+  ACTION_UPDATE,
+  ACTION_REMOVE
+} from './collection'
+
+// ===================================================================
+
+export default class UniqueIndex {
+  constructor (computeHash) {
+    if (computeHash) {
+      this.computeHash = iteratee(computeHash)
+    }
+
+    this._itemByHash = Object.create(null)
+    this._keysToHash = Object.create(null)
+
+    // Bound versions of listeners.
+    this._onAdd = bind(this._onAdd, this)
+    this._onUpdate = bind(this._onUpdate, this)
+    this._onRemove = bind(this._onRemove, this)
+  }
+
+  // This method is used to compute the hash under which an item must
+  // be saved.
+  computeHash (value, key) {
+    throw new NotImplemented('this method must be overridden')
+  }
+
+  // -----------------------------------------------------------------
+
+  get items () {
+    return this._itemByHash
+  }
+
+  // -----------------------------------------------------------------
+
+  _attachCollection (collection) {
+    // Add existing entries.
+    //
+    // FIXME: I think there may be a race condition if the `add` event
+    // has not been emitted yet.
+    this._onAdd(collection.all)
+
+    collection.on(ACTION_ADD, this._onAdd)
+    collection.on(ACTION_UPDATE, this._onUpdate)
+    collection.on(ACTION_REMOVE, this._onRemove)
+  }
+
+  _detachCollection (collection) {
+    collection.removeListener(ACTION_ADD, this._onAdd)
+    collection.removeListener(ACTION_UPDATE, this._onUpdate)
+    collection.removeListener(ACTION_REMOVE, this._onRemove)
+
+    clearObject(this._itemByHash)
+    clearObject(this._keysToHash)
+  }
+
+  // -----------------------------------------------------------------
+
+  _onAdd (items) {
+    const {
+      computeHash,
+      _itemByHash: itemByHash,
+      _keysToHash: keysToHash
+    } = this
+
+    for (const key in items) {
+      const value = items[key]
+
+      const hash = computeHash(value, key)
+
+      if (hash != null) {
+        itemByHash[hash] = value
+        keysToHash[key] = hash
+      }
+    }
+  }
+
+  _onUpdate (items) {
+    const {
+      computeHash,
+      _itemByHash: itemByHash,
+      _keysToHash: keysToHash
+    } = this
+
+    for (const key in items) {
+      const value = items[key]
+
+      const prev = keysToHash[key]
+      const hash = computeHash(value, key)
+
+      // Removes item from the previous hash's list if any.
+      if (prev != null) delete itemByHash[prev]
+
+      // Inserts item into the new hash's list if any.
+      if (hash != null) {
+        itemByHash[hash] = value
+        keysToHash[key] = hash
+      } else {
+        delete keysToHash[key]
+      }
+    }
+  }
+
+  _onRemove (items) {
+    const {
+      _itemByHash: itemByHash,
+      _keysToHash: keysToHash
+    } = this
+
+    for (const key in items) {
+      const prev = keysToHash[key]
+      if (prev != null) {
+        delete itemByHash[prev]
+        delete keysToHash[key]
+      }
+    }
+  }
+}

packages/xo-collection/src/unique-index.spec.js

@@ -0,0 +1,131 @@
+/* eslint-env jest */
+
+import eventToPromise from 'event-to-promise'
+import { forEach } from 'lodash'
+
+import Collection from '..'
+import Index from '../unique-index'
+
+// ===================================================================
+
+const waitTicks = (n = 2) => {
+  const {nextTick} = process
+
+  return new Promise(resolve => {
+    (function waitNextTick () {
+      // The first tick is handled by Promise#then()
+      if (--n) {
+        nextTick(waitNextTick)
+      } else {
+        resolve()
+      }
+    })()
+  })
+}
+
+// ===================================================================
+
+describe('UniqueIndex', function () {
+  let col, byKey
+  const item1 = {
+    id: '2ccb8a72-dc65-48e4-88fe-45ef541f2cba',
+    key: '036dee1b-9a3b-4fb5-be8a-4f535b355581'
+  }
+  const item2 = {
+    id: '7d21dc51-4da8-4538-a2e9-dd6f4784eb76',
+    key: '103cd893-d2cc-4d37-96fd-c259ad04c0d4'
+  }
+  const item3 = {
+    id: '668c1274-4442-44a6-b99a-512188e0bb09'
+  }
+
+  beforeEach(function () {
+    col = new Collection()
+    forEach([item1, item2, item3], item => {
+      col.add(item)
+    })
+
+    byKey = new Index('key')
+
+    col.createIndex('byKey', byKey)
+
+    return waitTicks()
+  })
+
+  it('works with existing items', function () {
+    expect(col.indexes).toEqual({
+      byKey: {
+        [item1.key]: item1,
+        [item2.key]: item2
+      }
+    })
+  })
+
+  it('works with added items', function () {
+    const item4 = {
+      id: '823b56c4-4b96-4f3a-9533-5d08177167ac',
+      key: '1437af14-429a-40db-8a51-8a2f5ed03201'
+    }
+
+    col.add(item4)
+
+    return waitTicks().then(() => {
+      expect(col.indexes).toEqual({
+        byKey: {
+          [item1.key]: item1,
+          [item2.key]: item2,
+          [item4.key]: item4
+        }
+      })
+    })
+  })
+
+  it('works with updated items', function () {
+    const item1bis = {
+      id: item1.id,
+      key: 'e03d4a3a-0331-4aca-97a2-016bbd43a29b'
+    }
+
+    col.update(item1bis)
+
+    return waitTicks().then(() => {
+      expect(col.indexes).toEqual({
+        byKey: {
+          [item1bis.key]: item1bis,
+          [item2.key]: item2
+        }
+      })
+    })
+  })
+
+  it('works with removed items', function () {
+    col.remove(item2)
+
+    return waitTicks().then(() => {
+      expect(col.indexes).toEqual({
+        byKey: {
+          [item1.key]: item1
+        }
+      })
+    })
+  })
+
+  it('correctly updates the value even the same object has the same hash', function () {
+    const item1bis = {
+      id: item1.id,
+      key: item1.key,
+      newProp: true
+    }
+
+    col.update(item1bis)
+
+    return eventToPromise(col, 'finish').then(() => {
+      expect(col.indexes).toEqual({
+        byKey: {
+          [item1.key]: item1bis,
+          [item2.key]: item2
+        }
+      })
+    })
+  })
+})

packages/xo-collection/src/view.example.js

@@ -0,0 +1,56 @@
+import { forEach } from 'lodash'
+
+import Collection from '..'
+import View from '../view'
+
+// ===================================================================
+
+// Create the collection.
+const users = new Collection()
+users.getKey = (user) => user.name
+
+// Inserts some data.
+users.add({
+  name: 'bob'
+})
+users.add({
+  name: 'clara',
+  active: true
+})
+users.add({
+  name: 'ophelia'
+})
+users.add({
+  name: 'Steve',
+  active: true
+})
+
+// -------------------------------------------------------------------
+
+// Create the view.
+const activeUsers = new View(users, 'active')
+
+// Register some event listeners to see the changes.
+activeUsers.on('add', users => {
+  forEach(users, (_, id) => {
+    console.log('+ active user:', id)
+  })
+})
+activeUsers.on('remove', users => {
+  forEach(users, (_, id) => {
+    console.log('- active user:', id)
+  })
+})
+
+// Make some changes in the future.
+setTimeout(function () {
+  console.log('-----')
+
+  users.set({
+    name: 'ophelia',
+    active: true
+  })
+  users.set({
+    name: 'Steve'
+  })
+}, 10)

packages/xo-collection/src/view.js

@@ -0,0 +1,88 @@
+import { bind, forEach, iteratee as createCallback } from 'lodash'
+
+import Collection, {
+  ACTION_ADD,
+  ACTION_UPDATE,
+  ACTION_REMOVE
+} from './collection'
+
+// ===================================================================
+
+export default class View extends Collection {
+  constructor (collection, predicate) {
+    super()
+
+    this._collection = collection
+    this._predicate = createCallback(predicate)
+
+    // Handles initial items.
+    this._onAdd(this._collection.all)
+
+    // Bound versions of listeners.
+    this._onAdd = bind(this._onAdd, this)
+    this._onUpdate = bind(this._onUpdate, this)
+    this._onRemove = bind(this._onRemove, this)
+
+    // Register listeners.
+    this._collection.on(ACTION_ADD, this._onAdd)
+    this._collection.on(ACTION_UPDATE, this._onUpdate)
+    this._collection.on(ACTION_REMOVE, this._onRemove)
+  }
+
+  // This method is necessary to free the memory of the view if its
+  // life span is shorter than the collection.
+  destroy () {
+    this._collection.removeListener(ACTION_ADD, this._onAdd)
+    this._collection.removeListener(ACTION_UPDATE, this._onUpdate)
+    this._collection.removeListener(ACTION_REMOVE, this._onRemove)
+  }
+
+  add () {
+    throw new Error('a view is read only')
+  }
+
+  clear () {
+    throw new Error('a view is read only')
+  }
+
+  set () {
+    throw new Error('a view is read only')
+  }
+
+  update () {
+    throw new Error('a view is read only')
+  }
+
+  _onAdd (items) {
+    const {_predicate: predicate} = this
+
+    forEach(items, (value, key) => {
+      if (predicate(value, key, this)) {
+        // super.add() cannot be used because the item may already be
+        // in the view if it was already present at the creation of
+        // the view and its event not already emitted.
+        super.set(key, value)
+      }
+    })
+  }
+
+  _onUpdate (items) {
+    const {_predicate: predicate} = this
+
+    forEach(items, (value, key) => {
+      if (predicate(value, key, this)) {
+        super.set(key, value)
+      } else if (super.has(key)) {
+        super.remove(key)
+      }
+    })
+  }
+
+  _onRemove (items) {
+    forEach(items, (value, key) => {
+      if (super.has(key)) {
+        super.remove(key)
+      }
+    })
+  }
+}

packages/xo-collection/unique-index.js

@@ -0,0 +1 @@
+module.exports = require('./dist/unique-index')

packages/xo-collection/view.js

@@ -0,0 +1 @@
+module.exports = require('./dist/view')

packages/xo-common/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-common/README.md

@@ -0,0 +1,49 @@
+# xo-common [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> Code shared between [XO](https://xen-orchestra.com) server and clients
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-common):
+
+```
+> npm install --save xo-common
+```
+
+## Usage
+
+**TODO**
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+AGPL3 © [Vates SAS](https://vates.fr)

packages/xo-common/api-errors.js

@@ -0,0 +1 @@
+module.exports = require('./dist/api-errors')

packages/xo-common/package.json

@@ -0,0 +1,77 @@
+{
+  "name": "xo-common",
+  "version": "0.1.0",
+  "license": "AGPL-3.0",
+  "description": "Code shared between [XO](https://xen-orchestra.com) server and clients",
+  "keywords": [],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-common",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@isonoe.net"
+  },
+  "preferGlobal": false,
+  "bin": {},
+  "files": [
+    "dist/",
+    "*.js"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.18.0",
+    "lodash": "^4.16.6",
+    "make-error": "^1.2.1"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.18.0",
+    "babel-eslint": "^7.1.0",
+    "babel-plugin-lodash": "^3.2.9",
+    "babel-plugin-transform-runtime": "^6.15.0",
+    "babel-preset-env": "^1.0.0",
+    "babel-preset-stage-0": "^6.16.0",
+    "cross-env": "^3.1.3",
+    "dependency-check": "^2.6.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.5.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "clean": "rimraf dist/",
+    "depcheck": "dependency-check ./package.json --entry api-errors.js",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prebuild": "yarn run clean",
+    "predev": "yarn run clean",
+    "prepublish": "yarn run build"
+  },
+  "babel": {
+    "plugins": [
+      "lodash"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "browsers": "> 1%",
+            "node": 4
+          }
+        }
+      ],
+      "stage-0"
+    ]
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-common/src/api-errors.js

@@ -0,0 +1,166 @@
+import { BaseError } from 'make-error'
+import { isArray, iteratee } from 'lodash'
+
+class XoError extends BaseError {
+  constructor ({ code, message, data }) {
+    super(message)
+    this.code = code
+    this.data = data
+  }
+
+  toJsonRpcError () {
+    return {
+      message: this.message,
+      code: this.code,
+      data: this.data
+    }
+  }
+}
+
+const create = (code, getProps) => {
+  const factory = args => new XoError({ ...getProps(args), code })
+  factory.is = (error, predicate) =>
+    error.code === code && iteratee(predicate)(error)
+
+  return factory
+}
+
+// =============================================================================
+
+export const notImplemented = create(0, () => ({
+  message: 'not implemented'
+}))
+
+export const noSuchObject = create(1, (id, type) => ({
+  data: { id, type },
+  message: 'no such object'
+}))
+
+export const unauthorized = create(2, () => ({
+  message: 'not authenticated or not enough permissions'
+}))
+
+export const invalidCredentials = create(3, () => ({
+  message: 'invalid credentials'
+}))
+
+// Deprecated alreadyAuthenticated (4)
+
+export const forbiddenOperation = create(5, (operation, reason) => ({
+  data: { operation, reason },
+  message: `forbidden operation: ${operation}`
+}))
+
+// Deprecated GenericError (6)
+
+export const noHostsAvailable = create(7, () => ({
+  message: 'no hosts available'
+}))
+
+export const authenticationFailed = create(8, () => ({
+  message: 'authentication failed'
+}))
+
+export const serverUnreachable = create(9, objectId => ({
+  data: {
+    objectId
+  },
+  message: 'server unreachable'
+}))
+
+export const invalidParameters = create(10, (message, errors) => {
+  if (isArray(message)) {
+    errors = message
+    message = undefined
+  }
+
+  return {
+    data: { errors },
+    message: message || 'invalid parameters'
+  }
+})
+
+export const vmMissingPvDrivers = create(11, ({ vm }) => ({
+  data: {
+    objectId: vm
+  },
+  message: 'missing PV drivers'
+}))
+
+export const vmIsTemplate = create(12, ({ vm }) => ({
+  data: {
+    objectId: vm
+  },
+  message: 'VM is a template'
+}))
+
+// TODO: We should probably create a more generic error which gathers all incorrect state errors.
+// e.g.:
+// incorrectState {
+//   data: {
+//     objectId: 'af43e227-3deb-4822-a79b-968825de72eb',
+//     property: 'power_state',
+//     actual: 'Running',
+//     expected: 'Halted'
+//   },
+//   message: 'incorrect state'
+// }
+export const vmBadPowerState = create(13, ({ vm, expected, actual }) => ({
+  data: {
+    objectId: vm,
+    expected,
+    actual
+  },
+  message: `VM state is ${actual} but should be ${expected}`
+}))
+
+export const vmLacksFeature = create(14, ({ vm, feature }) => ({
+  data: {
+    objectId: vm,
+    feature
+  },
+  message: `VM lacks feature ${feature || ''}`
+}))
+
+export const notSupportedDuringUpgrade = create(15, () => ({
+  message: 'not supported during upgrade'
+}))
+
+export const objectAlreadyExists = create(16, ({ objectId, objectType }) => ({
+  data: {
+    objectId,
+    objectType
+  },
+  message: `${objectType || 'object'} already exists`
+}))
+
+export const vdiInUse = create(17, ({ vdi, operation }) => ({
+  data: {
+    objectId: vdi,
+    operation
+  },
+  message: 'VDI in use'
+}))
+
+export const hostOffline = create(18, ({ host }) => ({
+  data: {
+    objectId: host
+  },
+  message: 'host offline'
+}))
+
+export const operationBlocked = create(19, ({ objectId, code }) => ({
+  data: {
+    objectId,
+    code
+  },
+  message: 'operation blocked'
+}))
+
+export const patchPrecheckFailed = create(20, ({ errorType, patch }) => ({
+  data: {
+    objectId: patch,
+    errorType
+  },
+  message: `patch precheck failed: ${errorType}`
+}))

packages/xo-lib/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-lib/README.md

@@ -0,0 +1,168 @@
+# xo-lib [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> Library to connect to XO-Server.
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-lib):
+
+```
+npm install --save xo-lib
+```
+
+Then require the package:
+
+```javascript
+import Xo from 'xo-lib'
+```
+
+## Usage
+
+> If the URL is not provided and the current environment is a web
+> browser, the location of the current page will be used.
+
+```javascript
+// Connect to XO.
+const xo = new Xo({ url: 'https://xo.company.tld' })
+
+// Let's start by opening the connection.
+await xo.open()
+
+// Must sign in before being able to call any methods (all calls will
+// be buffered until signed in).
+await xo.signIn({
+  email: 'admin@admin.net',
+  password: 'admin'
+})
+
+console('signed as', xo.user)
+```
+
+The credentials can also be passed directly to the constructor:
+
+```javascript
+const xo = Xo({
+  url: 'https://xo.company.tld',
+  credentials: {
+    email: 'admin@admin.net',
+    password: 'admin',
+  }
+})
+
+xo.open()
+
+xo.on('authenticated', () => {
+  console.log(xo.user)
+})
+```
+
+> If the URL is not provided and the current environment is a web
+> browser, the location of the current page will be used.
+
+### Connection
+
+```javascript
+await xo.open()
+
+console.log('connected')
+```
+
+### Disconnection
+
+```javascript
+xo.close()
+
+console.log('disconnected')
+```
+
+### Method call
+
+```javascript
+const token = await xo.call('token.create')
+
+console.log('Token created', token)
+```
+
+### Status
+
+The connection status is available through the status property which
+is *open*, *connecting* or *closed*.
+
+```javascript
+console.log('%s to xo-server', xo.status)
+```
+
+### Current user
+
+Information about the user account used to sign in is available
+through the `user` property.
+
+```javascript
+console.log('Current user is', xo.user)
+```
+
+> This property is null when the status is not connected.
+
+### Events
+
+```javascript
+xo.on('open', () => {
+  console.log('connected')
+})
+```
+
+```javascript
+xo.on('closed', () => {
+  console.log('disconnected')
+})
+```
+
+```javascript
+xo.on('notification', function (notif) {
+  console.log('notification:', notif.method, notif.params)
+})
+```
+
+```javascript
+xo.on('authenticated', () => {
+  console.log('authenticated as', xo.user)
+})
+
+xo.on('authenticationFailure', () => {
+  console.log('failed to authenticate')
+})
+```
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+ISC © [Vates SAS](http://vates.fr)

packages/xo-lib/example.js

@@ -0,0 +1,45 @@
+'use strict'
+
+process.on('unhandledRejection', function (error) {
+  console.log(error)
+})
+
+var Xo = require('./').default
+
+var xo = new Xo({
+  url: 'localhost:9000'
+})
+
+xo.open().then(function () {
+  return xo.call('acl.get', {}).then(function (result) {
+    console.log('success:', result)
+  }).catch(function (error) {
+    console.log('failure:', error)
+  })
+}).then(function () {
+  return xo.signIn({
+    email: 'admin@admin.net',
+    password: 'admin'
+  }).then(function () {
+    console.log('connected as ', xo.user)
+  }).catch(function (error) {
+    console.log('failure:', error)
+  })
+}).then(function () {
+  return xo.signIn({
+    email: 'tom',
+    password: 'tom'
+  }).then(function () {
+    console.log('connected as', xo.user)
+
+    return xo.call('acl.get', {}).then(function (result) {
+      console.log('success:', result)
+    }).catch(function (error) {
+      console.log('failure:', error)
+    })
+  }).catch(function (error) {
+    console.log('failure', error)
+  })
+}).then(function () {
+  return xo.close()
+})

packages/xo-lib/package.json

@@ -0,0 +1,80 @@
+{
+  "name": "xo-lib",
+  "version": "0.8.2",
+  "license": "ISC",
+  "description": "Library to connect to XO-Server",
+  "keywords": [
+    "xen",
+    "orchestra",
+    "xen-orchestra"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-lib",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@vates.fr"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "jsonrpc-websocket-client": "^0.1.2",
+    "lodash": "^4.17.2",
+    "make-error": "^1.0.4"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.18.0",
+    "babel-eslint": "^7.1.1",
+    "babel-plugin-lodash": "^3.2.9",
+    "babel-preset-env": "^1.0.1",
+    "babel-preset-stage-0": "^6.16.0",
+    "cross-env": "^3.1.3",
+    "dependency-check": "^2.6.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.5.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "clean": "rimraf dist/",
+    "depcheck": "dependency-check ./package.json",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prebuild": "yarn run clean",
+    "predev": "yarn run clean",
+    "prepublish": "yarn run build"
+  },
+  "babel": {
+    "plugins": [
+      "lodash"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "browsers": "> 2%",
+            "node": 4
+          }
+        }
+      ],
+      "stage-0"
+    ]
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-lib/src/index.js

@@ -0,0 +1,83 @@
+import JsonRpcWebSocketClient, {
+  OPEN,
+  CLOSED
+} from 'jsonrpc-websocket-client'
+import { BaseError } from 'make-error'
+import { startsWith } from 'lodash'
+
+// ===================================================================
+
+const noop = () => {}
+
+// ===================================================================
+
+export class XoError extends BaseError {}
+
+// -------------------------------------------------------------------
+
+export default class Xo extends JsonRpcWebSocketClient {
+  constructor (opts) {
+    const url = opts && opts.url || '.'
+    super(`${url === '/' ? '' : url}/api/`)
+
+    this._credentials = opts && opts.credentials || null
+    this._user = null
+
+    this.on(OPEN, () => {
+      if (this._credentials) {
+        this._signIn(this._credentials).catch(noop)
+      }
+    })
+    this.on(CLOSED, () => {
+      this._user = null
+    })
+  }
+
+  get user () {
+    return this._user
+  }
+
+  call (method, args, i) {
+    if (startsWith(method, 'session.')) {
+      return Promise.reject(
+        new XoError('session.*() methods are disabled from this interface')
+      )
+    }
+
+    const promise = super.call(method, args)
+    promise.retry = (predicate) => promise.catch((error) => {
+      i = (i || 0) + 1
+      if (predicate(error, i)) {
+        return this.call(method, args, i)
+      }
+    })
+
+    return promise
+  }
+
+  refreshUser () {
+    return super.call('session.getUser').then(user => {
+      return (this._user = user)
+    })
+  }
+
+  signIn (credentials) {
+    // Register this credentials for future use.
+    this._credentials = credentials
+
+    return this._signIn(credentials)
+  }
+
+  _signIn (credentials) {
+    return super.call('session.signIn', credentials).then(
+      user => {
+        this._user = user
+        this.emit('authenticated')
+      },
+      error => {
+        this.emit('authenticationFailure', error)
+        throw error
+      }
+    )
+  }
+}

packages/xo-remote-parser/.npmignore

@@ -0,0 +1,24 @@
+/benchmark/
+/benchmarks/
+*.bench.js
+*.bench.js.map
+
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/fixture/
+/fixtures/
+*.fixture.js
+*.fixture.js.map
+*.fixtures.js
+*.fixtures.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map
+
+__snapshots__/

packages/xo-remote-parser/README.md

@@ -0,0 +1,49 @@
+# ${pkg.name} [![Build Status](https://travis-ci.org/${pkg.shortGitHubPath}.png?branch=master)](https://travis-ci.org/${pkg.shortGitHubPath})
+
+> ${pkg.description}
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/${pkg.name}):
+
+```
+> npm install --save ${pkg.name}
+```
+
+## Usage
+
+**TODO**
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](${pkg.bugs})
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+${pkg.license} © [${pkg.author.name}](${pkg.author.url})

packages/xo-remote-parser/package.json

@@ -0,0 +1,81 @@
+{
+  "name": "xo-remote-parser",
+  "version": "0.3.0",
+  "license": "AGPL-3.0",
+  "description": "",
+  "keywords": [],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-remote-parser",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Fabrice Marsaud",
+    "email": "fabrice.marsaud@vates.fr"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "lodash": "^4.13.1"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.18.0",
+    "babel-eslint": "^7.1.1",
+    "babel-plugin-lodash": "^3.2.11",
+    "babel-preset-env": "^1.1.7",
+    "babel-preset-stage-3": "^6.17.0",
+    "cross-env": "^3.1.4",
+    "deep-freeze": "^0.0.1",
+    "dependency-check": "^2.7.0",
+    "jest": "^18.1.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.6.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "dev-test": "jest --bail --watch",
+    "posttest": "standard && dependency-check ./package.json",
+    "prebuild": "rimraf dist/",
+    "predev": "yarn run prebuild",
+    "prepublish": "yarn run build",
+    "test": "jest"
+  },
+  "babel": {
+    "plugins": [
+      "lodash"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "browsers": "> 5%",
+            "node": 4
+          }
+        }
+      ],
+      "stage-3"
+    ]
+  },
+  "jest": {
+    "testPathDirs": [
+      "<rootDir>/src"
+    ],
+    "testRegex": "\\.spec\\.js$"
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-remote-parser/src/index.js

@@ -0,0 +1,57 @@
+import filter from 'lodash/filter'
+import map from 'lodash/map'
+import trim from 'lodash/trim'
+import trimStart from 'lodash/trimStart'
+
+const sanitizePath = (...paths) => filter(map(paths, s => s && filter(map(s.split('/'), trim)).join('/'))).join('/')
+
+export const parse = string => {
+  const object = { }
+
+  const [type, rest] = string.split('://')
+  if (type === 'file') {
+    object.type = 'file'
+    object.path = `/${trimStart(rest, '/')}` // the leading slash has been forgotten on client side first implementation
+  } else if (type === 'nfs') {
+    object.type = 'nfs'
+    const [host, path] = rest.split(':')
+    object.host = host
+    object.path = `/${trimStart(path, '/')}` // takes care of a missing leading slash coming from previous version format
+  } else if (type === 'smb') {
+    object.type = 'smb'
+    const lastAtSign = rest.lastIndexOf('@')
+    const smb = rest.slice(lastAtSign + 1)
+    const auth = rest.slice(0, lastAtSign)
+    const firstColon = auth.indexOf(':')
+    const username = auth.slice(0, firstColon)
+    const password = auth.slice(firstColon + 1)
+    const [domain, sh] = smb.split('\\\\')
+    const [host, path] = sh.split('\0')
+    object.host = host
+    object.path = path
+    object.domain = domain
+    object.username = username
+    object.password = password
+  }
+  return object
+}
+
+export const format = ({type, host, path, username, password, domain}) => {
+  type === 'local' && (type = 'file')
+  let string = `${type}://`
+  if (type === 'nfs') {
+    string += `${host}:`
+  }
+  if (type === 'smb') {
+    string += `${username}:${password}@${domain}\\\\${host}`
+  }
+  path = sanitizePath(path)
+  if (type === 'smb') {
+    path = path.split('/')
+    path = '\0' + path.join('\\') // FIXME saving with the windows fashion \ was a bad idea :,(
+  } else {
+    path = `/${path}`
+  }
+  string += path
+  return string
+}

packages/xo-remote-parser/src/index.spec.js

@@ -0,0 +1,89 @@
+/* eslint-env jest */
+
+import deepFreeze from 'deep-freeze'
+
+import { parse, format } from './'
+
+// ===================================================================
+
+// Data used for both parse and format (i.e. correctly formatted).
+const data = deepFreeze({
+  file: {
+    string: 'file:///var/lib/xoa/backup',
+    object: {
+      type: 'file',
+      path: '/var/lib/xoa/backup'
+    }
+  },
+  SMB: {
+    string: 'smb://Administrator:pas:sw@ord@toto\\\\192.168.100.225\\smb\0',
+    object: {
+      type: 'smb',
+      host: '192.168.100.225\\smb',
+      path: '',
+      domain: 'toto',
+      username: 'Administrator',
+      password: 'pas:sw@ord'
+    }
+  },
+  NFS: {
+    string: 'nfs://192.168.100.225:/media/nfs',
+    object: {
+      type: 'nfs',
+      host: '192.168.100.225',
+      path: '/media/nfs'
+    }
+  }
+})
+
+const parseData = deepFreeze({
+  ...data,
+
+  'file with missing leading slash (#7)': {
+    string: 'file://var/lib/xoa/backup',
+    object: {
+      type: 'file',
+      path: '/var/lib/xoa/backup'
+    }
+  },
+  'nfs with missing leading slash': {
+    string: 'nfs://192.168.100.225:media/nfs',
+    object: {
+      type: 'nfs',
+      host: '192.168.100.225',
+      path: '/media/nfs'
+    }
+  }
+})
+
+const formatData = deepFreeze({
+  ...data,
+
+  'file with local type': {
+    string: 'file:///var/lib/xoa/backup',
+    object: {
+      type: 'local',
+      path: '/var/lib/xoa/backup'
+    }
+  }
+})
+
+// -------------------------------------------------------------------
+
+describe('format', () => {
+  for (const name in formatData) {
+    const datum = formatData[name]
+    it(name, () => {
+      expect(format(datum.object)).toBe(datum.string)
+    })
+  }
+})
+
+describe('parse', () => {
+  for (const name in parseData) {
+    const datum = parseData[name]
+    it(name, () => {
+      expect(parse(datum.string)).toEqual(datum.object)
+    })
+  }
+})

packages/xo-server-auth-github/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-server-auth-github/README.md

@@ -0,0 +1,64 @@
+# xo-server-auth-github [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> GitHub authentication plugin for XO-Server
+
+This plugin allows GitHub users to authenticate to Xen-Orchestra.
+
+The first time a user signs in, XO will create a new XO user with the
+same identifier.
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-server-auth-github):
+
+```
+> npm install --global xo-server-auth-github
+```
+
+## Usage
+
+> This plugin is based on [passport-github](https://github.com/jaredhanson/passport-github),
+> see [its documentation](https://github.com/jaredhanson/passport-github#configure-strategy)
+> for more information about the configuration.
+
+Like all other xo-server plugins, it can be configured directly via
+the web interface, see [the plugin documentation](https://xen-orchestra.com/docs/plugins.html).
+
+![Registering XO instance in GitHub](github.png)
+
+## Development
+
+### Installing dependencies
+
+```
+> npm install
+```
+
+### Compilation
+
+The sources files are watched and automatically recompiled on changes.
+
+```
+> npm run dev
+```
+
+### Tests
+
+```
+> npm run test-dev
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+AGPL3 © [Vates SAS](http://vates.fr)

packages/xo-server-auth-github/package.json

@@ -0,0 +1,74 @@
+{
+  "name": "xo-server-auth-github",
+  "version": "0.2.1",
+  "license": "AGPL-3.0",
+  "description": "GitHub authentication plugin for XO-Server",
+  "keywords": [
+    "xo-server",
+    "xo-server",
+    "authentication",
+    "github"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-server-auth-github",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@isonoe.net"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.11.6",
+    "passport-github": "^1.1.0"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.16.0",
+    "babel-eslint": "^7.0.0",
+    "babel-plugin-transform-runtime": "^6.15.0",
+    "babel-preset-latest": "^6.16.0",
+    "babel-preset-stage-0": "^6.16.0",
+    "clarify": "^2.0.0",
+    "dependency-check": "^2.6.0",
+    "mocha": "^3.1.0",
+    "must": "^0.13.2",
+    "source-map-support": "^0.4.3",
+    "standard": "^8.2.0",
+    "trace": "^2.3.3"
+  },
+  "scripts": {
+    "build": "NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "depcheck": "dependency-check ./package.json",
+    "dev": "NODE_DEV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "dev-test": "mocha --opts .mocha.opts --watch --reporter=min \"dist/**/*.spec.js\"",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prepublish": "yarn run build",
+    "test": "mocha --opts .mocha.opts \"dist/**/*.spec.js\""
+  },
+  "babel": {
+    "plugins": [
+      "transform-runtime"
+    ],
+    "presets": [
+      "latest",
+      "stage-0"
+    ]
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-server-auth-github/src/index.js

@@ -0,0 +1,44 @@
+import {Strategy} from 'passport-github'
+
+// ===================================================================
+
+export const configurationSchema = {
+  type: 'object',
+  properties: {
+    clientID: {
+      type: 'string'
+    },
+    clientSecret: {
+      type: 'string'
+    }
+  },
+  required: ['clientID', 'clientSecret']
+}
+
+// ===================================================================
+
+class AuthGitHubXoPlugin {
+  constructor (xo) {
+    this._xo = xo
+  }
+
+  configure (conf) {
+    this._conf = conf
+  }
+
+  load () {
+    const {_xo: xo} = this
+
+    xo.registerPassportStrategy(new Strategy(this._conf, async (accessToken, refreshToken, profile, done) => {
+      try {
+        done(null, await xo.registerUser('github', profile.username))
+      } catch (error) {
+        done(error.message)
+      }
+    }))
+  }
+}
+
+// ===================================================================
+
+export default ({xo}) => new AuthGitHubXoPlugin(xo)

packages/xo-server-auth-github/src/index.spec.js

@@ -0,0 +1,17 @@
+/* eslint-env mocha */
+
+import expect from 'must'
+
+// ===================================================================
+
+import myLib from './'
+
+// ===================================================================
+
+describe.skip('myLib', () => {
+  it('does something', () => {
+    // TODO: some real tests.
+
+    expect(myLib).to.exists()
+  })
+})

packages/xo-server-auth-ldap/.gitignore

@@ -0,0 +1 @@
+/ldap.cache.conf

packages/xo-server-auth-ldap/.npmignore

@@ -0,0 +1,24 @@
+/benchmark/
+/benchmarks/
+*.bench.js
+*.bench.js.map
+
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/fixture/
+/fixtures/
+*.fixture.js
+*.fixture.js.map
+*.fixtures.js
+*.fixtures.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map
+
+__snapshots__/

packages/xo-server-auth-ldap/README.md

@@ -0,0 +1,82 @@
+# xo-server-auth-ldap [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> LDAP authentication plugin for XO-Server
+
+This plugin allows LDAP users to authenticate to Xen-Orchestra.
+
+The first time a user signs in, XO will create a new XO user with the
+same identifier.
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-server-auth-ldap):
+
+```
+> npm install --global xo-server-auth-ldap
+```
+
+## Usage
+
+Like all other xo-server plugins, it can be configured directly via
+the web interface, see [the plugin documentation](https://xen-orchestra.com/docs/plugins.html).
+
+If you have issues, you can use the provided CLI to gather more
+information:
+
+```
+> xo-server-auth-ldap
+? uri ldap://ldap.company.net
+? fill optional certificateAuthorities? No
+? fill optional checkCertificate? No
+? fill optional bind? No
+? base ou=people,dc=company,dc=net
+? fill optional filter? No
+configuration saved in ./ldap.cache.conf
+? Username john.smith
+? Password *****
+searching for entries...
+0 entries found
+could not authenticate john.smith
+```
+
+## Algorithm
+
+1. If `bind` is defined, attempt to bind using this user.
+2. Searches for the user in the directory starting from the `base`
+   with the defined `filter`.
+3. If found, a bind is attempted using the distinguished name of this
+   user and the provided password.
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+AGPL3 © [Vates SAS](http://vates.fr)

packages/xo-server-auth-ldap/package.json

@@ -0,0 +1,97 @@
+{
+  "name": "xo-server-auth-ldap",
+  "version": "0.6.2",
+  "license": "AGPL-3.0",
+  "description": "LDAP authentication plugin for XO-Server",
+  "keywords": [
+    "ldap",
+    "orchestra",
+    "plugin",
+    "xen",
+    "xen-orchestra",
+    "xo-server"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-server-auth-ldap",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@vates.fr"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {
+    "xo-server-auth-ldap": "dist/test-cli.js"
+  },
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.22.0",
+    "event-to-promise": "^0.7.0",
+    "exec-promise": "^0.6.1",
+    "inquirer": "^3.0.1",
+    "ldapjs": "^1.0.1",
+    "lodash": "^4.17.4",
+    "promise-toolbox": "^0.8.0"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.22.2",
+    "babel-eslint": "^7.1.1",
+    "babel-plugin-lodash": "^3.2.11",
+    "babel-plugin-transform-runtime": "^6.22.0",
+    "babel-preset-env": "^1.1.8",
+    "babel-preset-stage-3": "^6.22.0",
+    "cross-env": "^3.1.4",
+    "dependency-check": "^2.8.0",
+    "jest": "^18.1.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.6.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "commitmsg": "npm test",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "dev-test": "jest --bail --watch",
+    "posttest": "standard && dependency-check ./package.json",
+    "prebuild": "rimraf dist/",
+    "predev": "npm run prebuild",
+    "prepublish": "npm run build",
+    "test": "jest"
+  },
+  "babel": {
+    "plugins": [
+      "lodash",
+      "transform-runtime"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "node": 4
+          }
+        }
+      ],
+      "stage-3"
+    ]
+  },
+  "jest": {
+    "testPathDirs": [
+      "<rootDir>/src"
+    ],
+    "testRegex": "\\.spec\\.js$"
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-server-auth-ldap/src/index.js

@@ -0,0 +1,244 @@
+/* eslint no-throw-literal: 0 */
+
+import eventToPromise from 'event-to-promise'
+import { bind, noop } from 'lodash'
+import { createClient } from 'ldapjs'
+import { escape } from 'ldapjs/lib/filters/escape'
+import { promisify } from 'promise-toolbox'
+import { readFile } from 'fs'
+
+// ===================================================================
+
+const VAR_RE = /\{\{([^}]+)\}\}/g
+const evalFilter = (filter, vars) => filter.replace(VAR_RE, (_, name) => {
+  const value = vars[name]
+
+  if (value === undefined) {
+    throw new Error('invalid variable: ' + name)
+  }
+
+  return escape(value)
+})
+
+export const configurationSchema = {
+  type: 'object',
+  properties: {
+    uri: {
+      description: 'URI of the LDAP server.',
+      type: 'string'
+    },
+    certificateAuthorities: {
+      description: `
+Paths to CA certificates to use when connecting to SSL-secured LDAP servers.
+
+If not specified, it will use a default set of well-known CAs.
+`.trim(),
+      type: 'array',
+      items: {
+        type: 'string'
+      }
+    },
+    checkCertificate: {
+      description: 'Enforce the validity of the server\'s certificates. You can disable it when connecting to servers that use a self-signed certificate.',
+      type: 'boolean',
+      default: true
+    },
+    bind: {
+      description: 'Credentials to use before looking for the user record.',
+      type: 'object',
+      properties: {
+        dn: {
+          description: `
+Full distinguished name of the user permitted to search the LDAP directory for the user to authenticate.
+
+Example: uid=xoa-auth,ou=people,dc=company,dc=net
+
+For Microsoft Active Directory, it can also be \`<user>@<domain>\`.
+`.trim(),
+          type: 'string'
+        },
+        password: {
+          description: 'Password of the user permitted of search the LDAP directory.',
+          type: 'string'
+        }
+      },
+      required: ['dn', 'password']
+    },
+    base: {
+      description: 'The base is the part of the description tree where the users are looked for.',
+      type: 'string'
+    },
+    filter: {
+      description: `
+Filter used to find the user.
+
+For Microsoft Active Directory, you can try one of the following filters:
+
+- \`(cn={{name}})\`
+- \`(sAMAccountName={{name}})\`
+- \`(sAMAccountName={{name}}@<domain>)\` (replace \`<domain>\` by your own domain)
+- \`(userPrincipalName={{name}})\`
+`.trim(),
+      type: 'string',
+      default: '(uid={{name}})'
+    }
+  },
+  required: ['uri', 'base']
+}
+
+export const testSchema = {
+  type: 'object',
+  properties: {
+    username: {
+      description: 'LDAP username',
+      type: 'string'
+    },
+    password: {
+      description: 'LDAP password',
+      type: 'string'
+    }
+  },
+  required: ['username', 'password']
+}
+
+// ===================================================================
+
+class AuthLdap {
+  constructor (xo) {
+    this._xo = xo
+
+    this._authenticate = bind(this._authenticate, this)
+  }
+
+  async configure (conf) {
+    const clientOpts = this._clientOpts = {
+      url: conf.uri,
+      maxConnections: 5,
+      tlsOptions: {}
+    }
+
+    {
+      const {
+        bind,
+        checkCertificate = true,
+        certificateAuthorities
+      } = conf
+
+      if (bind) {
+        clientOpts.bindDN = bind.dn
+        clientOpts.bindCredentials = bind.password
+      }
+
+      const {tlsOptions} = clientOpts
+
+      tlsOptions.rejectUnauthorized = checkCertificate
+      if (certificateAuthorities) {
+        tlsOptions.ca = await Promise.all(
+          certificateAuthorities.map(path => readFile(path))
+        )
+      }
+    }
+
+    const {
+      bind: credentials,
+      base: searchBase,
+      filter: searchFilter = '(uid={{name}})'
+    } = conf
+
+    this._credentials = credentials
+    this._searchBase = searchBase
+    this._searchFilter = searchFilter
+  }
+
+  load () {
+    this._xo.registerAuthenticationProvider(this._authenticate)
+  }
+
+  unload () {
+    this._xo.unregisterAuthenticationProvider(this._authenticate)
+  }
+
+  test ({ username, password }) {
+    return this._authenticate({
+      username,
+      password
+    }).then(result => {
+      if (result === null) {
+        throw new Error('could not authenticate user')
+      }
+    })
+  }
+
+  async _authenticate ({ username, password }, logger = noop) {
+    if (username === undefined || password === undefined) {
+      logger('require `username` and `password` to authenticate!')
+
+      return null
+    }
+
+    const client = createClient(this._clientOpts)
+
+    try {
+      // Promisify some methods.
+      const bind = promisify(client.bind, client)
+      const search = promisify(client.search, client)
+
+      await eventToPromise(client, 'connect')
+
+      // Bind if necessary.
+      {
+        const {_credentials: credentials} = this
+        if (credentials) {
+          logger(`attempting to bind with as ${credentials.dn}...`)
+          await bind(credentials.dn, credentials.password)
+          logger(`successfully bound as ${credentials.dn}`)
+        }
+      }
+
+      // Search for the user.
+      const entries = []
+      {
+        logger('searching for entries...')
+        const response = await search(this._searchBase, {
+          scope: 'sub',
+          filter: evalFilter(this._searchFilter, {
+            name: username
+          })
+        })
+
+        response.on('searchEntry', entry => {
+          logger('.')
+          entries.push(entry.json)
+        })
+
+        const {status} = await eventToPromise(response, 'end')
+        if (status) {
+          throw new Error('unexpected search response status: ' + status)
+        }
+
+        logger(`${entries.length} entries found`)
+      }
+
+      // Try to find an entry which can be bind with the given password.
+      for (const entry of entries) {
+        try {
+          logger(`attempting to bind as ${entry.objectName}`)
+          await bind(entry.objectName, password)
+          logger(`successfully bound as ${entry.objectName} => ${username} authenticated`)
+          return { username }
+        } catch (error) {
+          logger(`failed to bind as ${entry.objectName}: ${error.message}`)
+        }
+      }
+
+      logger(`could not authenticate ${username}`)
+      return null
+    } finally {
+      client.unbind()
+    }
+  }
+}
+
+// ===================================================================
+
+export default ({xo}) => new AuthLdap(xo)

packages/xo-server-auth-ldap/src/prompt-schema.js

@@ -0,0 +1,166 @@
+import { forEach, isFinite, isInteger } from 'lodash'
+import { forOwn as forOwnAsync } from 'promise-toolbox'
+import { prompt } from 'inquirer'
+
+// ===================================================================
+
+const EMPTY_OBJECT = Object.freeze({ __proto__: null })
+
+const _extractValue = ({ value }) => value
+
+export const confirm = (message, {
+  default: defaultValue = null
+} = EMPTY_OBJECT) => prompt({
+  default: defaultValue,
+  message,
+  name: 'value',
+  type: 'confirm'
+}).then(_extractValue)
+
+export const input = (message, {
+  default: defaultValue = null,
+  filter = undefined,
+  validate = undefined
+} = EMPTY_OBJECT) => prompt({
+  default: defaultValue,
+  message,
+  name: 'value',
+  type: 'input',
+  validate
+}).then(_extractValue)
+
+export const list = (message, choices, {
+  default: defaultValue = null
+} = EMPTY_OBJECT) => prompt({
+  default: defaultValue,
+  choices,
+  message,
+  name: 'value',
+  type: 'list'
+}).then(_extractValue)
+
+export const password = (message, {
+  default: defaultValue = null,
+  filter = undefined,
+  validate = undefined
+} = EMPTY_OBJECT) => prompt({
+  default: defaultValue,
+  message,
+  name: 'value',
+  type: 'password',
+  validate
+}).then(_extractValue)
+
+// ===================================================================
+
+const promptByType = {
+  __proto__: null,
+
+  array: async (schema, defaultValue, path) => {
+    const items = []
+    if (defaultValue == null) {
+      defaultValue = items
+    }
+
+    let i = 0
+
+    const itemSchema = schema.items
+    const promptItem = async () => {
+      items[i] = await promptGeneric(
+        itemSchema,
+        defaultValue[i],
+        path
+          ? `${path} [${i}]`
+          : `[${i}]`
+      )
+
+      ++i
+    }
+
+    let n = schema.minItems || 0
+    while (i < n) { // eslint-disable-line no-unmodified-loop-condition
+      await promptItem()
+    }
+
+    n = schema.maxItems || Infinity
+    while (
+      i < n && // eslint-disable-line no-unmodified-loop-condition
+      await confirm('additional item?', {
+        default: false
+      })
+    ) {
+      await promptItem()
+    }
+
+    return items
+  },
+
+  boolean: (schema, defaultValue, path) => confirm(path, {
+    default: defaultValue != null ? defaultValue : schema.default
+  }),
+
+  enum: (schema, defaultValue, path) => list(path, schema.enum, {
+    defaultValue: defaultValue || schema.defaultValue
+  }),
+
+  integer: (schema, defaultValue, path) => input(path, {
+    default: defaultValue || schema.default,
+    filter: input => +input,
+    validate: input => isInteger(+input)
+  }),
+
+  number: (schema, defaultValue, path) => input(path, {
+    default: defaultValue || schema.default,
+    filter: input => +input,
+    validate: input => isFinite(+input)
+  }),
+
+  object: async (schema, defaultValue, path) => {
+    const value = {}
+
+    const required = {}
+    schema.required && forEach(schema.required, name => {
+      required[name] = true
+    })
+
+    const promptProperty = async (schema, name) => {
+      const subpath = path
+        ? `${path} > ${schema.title || name}`
+        : schema.title || name
+
+      if (
+        required[name] ||
+        await confirm(`fill optional ${subpath}?`, {
+          default: Boolean(defaultValue && name in defaultValue)
+        })
+      ) {
+        value[name] = await promptGeneric(
+          schema,
+          defaultValue && defaultValue[name],
+          subpath
+        )
+      }
+    }
+
+    await forOwnAsync.call(schema.properties || {}, promptProperty)
+
+    return value
+  },
+
+  string: (schema, defaultValue, path) => input(path, {
+    default: defaultValue || schema.default
+  })
+}
+
+export default function promptGeneric (schema, defaultValue, path) {
+  const type = schema.enum
+    ? 'enum'
+    : schema.type
+
+  const prompt = promptByType[type.toLowerCase()]
+  if (!prompt) {
+    throw new Error(`unsupported type: ${type}`)
+  }
+
+  return prompt(schema, defaultValue, path)
+}

packages/xo-server-auth-ldap/src/test-cli.js

@@ -0,0 +1,49 @@
+#!/usr/bin/env node
+
+import execPromise from 'exec-promise'
+import { bind } from 'lodash'
+import { fromCallback } from 'promise-toolbox'
+import { readFile, writeFile } from 'fs'
+
+import promptSchema, {
+  input,
+  password
+} from './prompt-schema'
+import createPlugin, {
+  configurationSchema
+} from './'
+
+// ===================================================================
+
+const CACHE_FILE = './ldap.cache.conf'
+
+// -------------------------------------------------------------------
+
+execPromise(async args => {
+  const config = await promptSchema(
+    configurationSchema,
+    await fromCallback(cb => readFile(CACHE_FILE, 'utf-8', cb)).then(
+      JSON.parse,
+      () => ({})
+    )
+  )
+  await fromCallback(cb => writeFile(CACHE_FILE, JSON.stringify(config, null, 2), cb)).then(
+    () => {
+      console.log('configuration saved in %s', CACHE_FILE)
+    },
+    error => {
+      console.warn('failed to save configuration in %s', CACHE_FILE)
+      console.warn(error.message)
+    }
+  )
+
+  const plugin = createPlugin({})
+  await plugin.configure(config)
+
+  await plugin._authenticate({
+    username: await input('Username', {
+      validate: input => !!input.length
+    }),
+    password: await password('Password')
+  }, bind(console.log, console))
+})

packages/xo-server-auth-saml/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-server-auth-saml/README.md

@@ -0,0 +1,63 @@
+# xo-server-auth-saml [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> SAML authentication plugin for XO-Server
+
+This plugin allows SAML users to authenticate to Xen-Orchestra.
+
+The first time a user signs in, XO will create a new XO user with the
+same identifier.
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-server-auth-saml):
+
+```
+> npm install --global xo-server-auth-saml
+```
+
+## Usage
+
+> This plugin is based on [passport-saml](https://github.com/bergie/passport-saml),
+> see [its documentation](https://github.com/bergie/passport-saml#configure-strategy)
+> for more information about the configuration.
+
+Like all other xo-server plugins, it can be configured directly via
+the web interface, see [the plugin documentation](https://xen-orchestra.com/docs/plugins.html).
+
+> Important: When registering your instance to your identity provider,
+> you must configure its callback URL to
+> `http://xo.company.net/signin/saml/callback`!
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+AGPL3 © [Vates SAS](http://vates.fr)

packages/xo-server-auth-saml/package.json

@@ -0,0 +1,75 @@
+{
+  "name": "xo-server-auth-saml",
+  "version": "0.4.1",
+  "license": "AGPL-3.0",
+  "description": "SAML authentication plugin for XO-Server",
+  "keywords": [
+    "authentication",
+    "orchestra",
+    "plugin",
+    "saml",
+    "xen",
+    "xen-orchestra",
+    "xo-server"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-server-auth-saml",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@isonoe.net"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.11.6",
+    "passport-saml": "^0.15.0"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.14.0",
+    "babel-eslint": "^7.1.0",
+    "babel-plugin-transform-runtime": "^6.15.0",
+    "babel-preset-latest": "^6.16.0",
+    "babel-preset-stage-0": "^6.5.0",
+    "cross-env": "^3.1.3",
+    "dependency-check": "^2.6.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.2.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "clean": "rimraf dist/",
+    "depcheck": "dependency-check ./package.json",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prebuild": "yarn run clean",
+    "predev": "yarn run clean",
+    "prepublish": "yarn run build"
+  },
+  "babel": {
+    "plugins": [
+      "transform-runtime"
+    ],
+    "presets": [
+      "latest",
+      "stage-0"
+    ]
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-server-auth-saml/src/index.js

@@ -0,0 +1,59 @@
+import {Strategy} from 'passport-saml'
+
+// ===================================================================
+
+export const configurationSchema = {
+  type: 'object',
+  properties: {
+    cert: {
+      type: 'string'
+    },
+    entryPoint: {
+      type: 'string'
+    },
+    issuer: {
+      type: 'string'
+    },
+    usernameField: {
+      type: 'string'
+    }
+  },
+  required: ['cert', 'entryPoint', 'issuer']
+}
+
+// ===================================================================
+
+class AuthSamlXoPlugin {
+  constructor ({ xo }) {
+    this._conf = null
+    this._usernameField = null
+    this._xo = xo
+  }
+
+  configure ({ usernameField, ...conf }) {
+    this._usernameField = usernameField
+    this._conf = conf
+  }
+
+  load () {
+    const xo = this._xo
+
+    xo.registerPassportStrategy(new Strategy(this._conf, async (profile, done) => {
+      const name = profile[this._usernameField]
+      if (!name) {
+        done('no name found for this user')
+        return
+      }
+
+      try {
+        done(null, await xo.registerUser('saml', name))
+      } catch (error) {
+        done(error.message)
+      }
+    }))
+  }
+}
+
+// ===================================================================
+
+export default opts => new AuthSamlXoPlugin(opts)

packages/xo-server-backup-reports/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-server-backup-reports/README.md

@@ -0,0 +1,52 @@
+# xo-server-backup-reports [![Build Status](https://api.travis-ci.org/vatesfr/xo-server-backup-reports.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+> Backup reports plugin for XO-Server
+
+XO-Server plugin which sends email reports and Xmpp messages when backup jobs are done.
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-server-backup-reports):
+
+```
+> npm install --global xo-server-backup-reports
+```
+
+## Usage
+
+Like all other xo-server plugins, it can be configured directly via
+the web interface, see [the plugin documentation](https://xen-orchestra.com/docs/plugins.html).
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+AGPL3 © [Vates SAS](http://vates.fr)

packages/xo-server-backup-reports/package.json

@@ -0,0 +1,85 @@
+{
+  "name": "xo-server-backup-reports",
+  "version": "0.6.0",
+  "license": "AGPL-3.0",
+  "description": "Backup reports plugin for XO-Server",
+  "keywords": [
+    "backup",
+    "email",
+    "mail",
+    "orchestra",
+    "plugin",
+    "report",
+    "reports",
+    "xen",
+    "xen-orchestra",
+    "xo-server"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-server-backup-reports",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@isonoe.net"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "lodash": "^4.13.1",
+    "moment": "^2.13.0"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.18.0",
+    "babel-eslint": "^7.1.1",
+    "babel-plugin-lodash": "^3.2.10",
+    "babel-preset-env": "^1.0.0",
+    "babel-preset-stage-0": "^6.16.0",
+    "cross-env": "^3.1.3",
+    "dependency-check": "^2.6.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.5.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "clean": "rimraf dist/",
+    "depcheck": "dependency-check ./package.json",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prebuild": "yarn run clean",
+    "predev": "yarn run clean",
+    "prepublish": "yarn run build"
+  },
+  "babel": {
+    "plugins": [
+      "lodash"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "node": 4
+          }
+        }
+      ],
+      "stage-0"
+    ]
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-server-backup-reports/src/index.js

@@ -0,0 +1,178 @@
+import moment from 'moment'
+import { forEach } from 'lodash'
+
+export const configurationSchema = {
+  type: 'object',
+
+  properties: {
+    toMails: {
+      type: 'array',
+      title: 'mails',
+      description: 'an array of recipients (mails)',
+
+      items: {
+        type: 'string'
+      },
+      minItems: 1
+    },
+    toXmpp: {
+      type: 'array',
+      title: 'xmpp address',
+      description: 'an array of recipients (xmpp)',
+
+      items: {
+        type: 'string'
+      },
+      minItems: 1
+    }
+  }
+}
+
+// ===================================================================
+
+const logError = e => {
+  console.error('backup report error:', e)
+}
+
+class BackupReportsXoPlugin {
+  constructor (xo) {
+    this._xo = xo
+    this._report = ::this._wrapper
+  }
+
+  configure ({ toMails, toXmpp }) {
+    this._mailsReceivers = toMails
+    this._xmppReceivers = toXmpp
+  }
+
+  load () {
+    this._xo.on('job:terminated', this._report)
+  }
+
+  unload () {
+    this._xo.removeListener('job:terminated', this._report)
+  }
+
+  _wrapper (status) {
+    return new Promise(resolve => resolve(this._listener(status))).catch(logError)
+  }
+
+  _listener (status) {
+    let nSuccess = 0
+    let nCalls = 0
+    let reportWhen
+
+    const text = []
+    const nagiosText = []
+
+    forEach(status.calls, call => {
+      // Ignore call if it's not a Backup a Snapshot or a Disaster Recovery.
+      if (call.method !== 'vm.deltaCopy' &&
+          call.method !== 'vm.rollingDeltaBackup' &&
+          call.method !== 'vm.rollingDrCopy' &&
+          call.method !== 'vm.rollingSnapshot' &&
+          call.method !== 'vm.rollingBackup') {
+        return
+      }
+
+      reportWhen = call.params._reportWhen
+
+      if (reportWhen === 'never') {
+        return
+      }
+
+      nCalls++
+      if (!call.error) {
+        nSuccess++
+      }
+
+      let vm
+
+      try {
+        vm = this._xo.getObject(call.params.id || call.params.vm)
+      } catch (e) {}
+
+      const start = moment(call.start)
+      const end = moment(call.end)
+      const duration = moment.duration(end - start).humanize()
+
+      text.push([
+        `### VM : ${vm ? vm.name_label : 'undefined'}`,
+        `  - UUID: ${vm ? vm.uuid : 'undefined'}`,
+        call.error
+          ? `  - Status: Failure\n  - Error: ${call.error.message}`
+          : '  - Status: Success',
+        `  - Start time: ${String(start)}`,
+        `  - End time: ${String(end)}`,
+        `  - Duration: ${duration}`
+      ].join('\n'))
+
+      if (call.error) {
+        nagiosText.push(
+          `[ ${vm ? vm.name_label : 'undefined'} : ${call.error.message} ]`
+        )
+      }
+    })
+
+    // No backup calls.
+    if (nCalls === 0) {
+      return
+    }
+
+    const globalSuccess = nSuccess === nCalls
+    if (globalSuccess && (
+      reportWhen === 'fail' || // xo-web < 5
+      reportWhen === 'failure' // xo-web >= 5
+    )) {
+      return
+    }
+
+    const start = moment(status.start)
+    const end = moment(status.end)
+    const duration = moment.duration(end - start).humanize()
+    let method = status.calls[Object.keys(status.calls)[0]].method
+    method = method.slice(method.indexOf('.') + 1)
+      .replace(/([A-Z])/g, ' $1').replace(/^./, letter => letter.toUpperCase()) // humanize
+    const tag = status.calls[Object.keys(status.calls)[0]].params.tag
+
+    // Global status.
+    text.unshift([
+      `## Global status for "${tag}" (${method}): ${globalSuccess ? 'Success' : 'Fail'}`,
+      `  - Start time: ${String(start)}`,
+      `  - End time: ${String(end)}`,
+      `  - Duration: ${duration}`,
+      `  - Successful backed up VM number: ${nSuccess}`,
+      `  - Failed backed up VM: ${nCalls - nSuccess}`,
+      ''
+    ].join('\n'))
+
+    const markdown = text.join('\n')
+    const markdownNagios = nagiosText.join(' ')
+
+    // TODO : Handle errors when `sendEmail` isn't present. (Plugin dependencies)
+
+    const xo = this._xo
+    return Promise.all([
+      xo.sendEmail && xo.sendEmail({
+        to: this._mailsReceivers,
+        subject: `[Xen Orchestra][${globalSuccess ? 'Success' : 'Failure'}] Backup report for ${tag}`,
+        markdown
+      }),
+      xo.sendToXmppClient && xo.sendToXmppClient({
+        to: this._xmppReceivers,
+        message: markdown
+      }),
+      xo.sendSlackMessage && xo.sendSlackMessage({
+        message: markdown
+      }),
+      xo.sendPassiveCheck && xo.sendPassiveCheck({
+        status: globalSuccess ? 0 : 2,
+        message: globalSuccess ? `[Xen Orchestra] [Success] Backup report for ${tag}` : `[Xen Orchestra] [Failure] Backup report for ${tag} - VMs : ${markdownNagios}`
+      })
+    ])
+  }
+}
+
+// ===================================================================
+
+export default ({ xo }) => new BackupReportsXoPlugin(xo)

packages/xo-server-cloud/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-server-cloud/README.md

@@ -0,0 +1,48 @@
+# xo-server-cloud [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+## Install
+
+Installation of the [npm package](https://npmjs.org/package/xo-server-cloud):
+
+```
+> npm install --global xo-server-cloud
+```
+
+## Usage
+
+Like all other xo-server plugins, it can be configured directly via
+the web interface, see [the plugin documentation](https://xen-orchestra.com/docs/plugins.html).
+
+## Development
+
+```
+# Install dependencies
+> npm install
+
+# Run the tests
+> npm test
+
+# Continuously compile
+> npm run dev
+
+# Continuously run the tests
+> npm run dev-test
+
+# Build for production (automatically called by npm install)
+> npm run build
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+AGPL3 © [Vates SAS](https://vates.fr)

packages/xo-server-cloud/package.json

@@ -0,0 +1,83 @@
+{
+  "name": "xo-server-cloud",
+  "version": "0.2.0",
+  "license": "ISC",
+  "description": "",
+  "keywords": [
+    "cloud",
+    "orchestra",
+    "plugin",
+    "xen",
+    "xen-orchestra",
+    "xo-server"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-server-transport-cloud",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Pierre Donias",
+    "email": "pierre.donias@gmail.com"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.20.0",
+    "event-to-promise": "^0.7.0",
+    "jsonrpc-websocket-client": "^0.1.2",
+    "superagent": "^3.4.4"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.18.0",
+    "babel-eslint": "^7.1.1",
+    "babel-plugin-transform-runtime": "^6.15.0",
+    "babel-preset-env": "^1.1.4",
+    "babel-preset-stage-3": "^6.16.0",
+    "cross-env": "^3.1.3",
+    "dependency-check": "^2.6.0",
+    "rimraf": "^2.5.4",
+    "standard": "^8.6.0"
+  },
+  "scripts": {
+    "build": "cross-env NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "clean": "rimraf dist/",
+    "depcheck": "dependency-check ./package.json",
+    "dev": "cross-env NODE_ENV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prebuild": "yarn run clean",
+    "predev": "yarn run clean",
+    "prepublish": "yarn run build"
+  },
+  "babel": {
+    "plugins": [
+      "transform-runtime"
+    ],
+    "presets": [
+      [
+        "env",
+        {
+          "targets": {
+            "node": 4
+          }
+        }
+      ],
+      "stage-3"
+    ]
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-server-cloud/src/index.js

@@ -0,0 +1,149 @@
+import Client, { createBackoff } from 'jsonrpc-websocket-client'
+import eventToPromise from 'event-to-promise'
+import request from 'superagent'
+import { PassThrough } from 'stream'
+
+const UPDATER_URL = 'localhost'
+const WS_PORT = 9001
+const HTTP_PORT = 9002
+
+// ===================================================================
+
+class XoServerCloud {
+  constructor ({ xo }) {
+    this._xo = xo
+
+   // Defined in configure().
+    this._conf = null
+    this._key = null
+  }
+
+  configure (configuration) {
+    this._conf = configuration
+  }
+
+  async load () {
+    const getResourceCatalog = () => this._getCatalog()
+    getResourceCatalog.description = 'Get the list of all available resources'
+    getResourceCatalog.permission = 'admin'
+
+    const registerResource = ({ namespace }) => this._registerResource(namespace)
+    registerResource.description = 'Register a resource via cloud plugin'
+    registerResource.params = {
+      namespace: {
+        type: 'string'
+      }
+    }
+    registerResource.permission = 'admin'
+
+    this._unsetApiMethods = this._xo.addApiMethods({
+      cloud: {
+        getResourceCatalog,
+        registerResource
+      }
+    })
+    this._unsetRequestResource = this._xo.defineProperty('requestResource', this._requestResource, this)
+
+    const updater = this._updater = new Client(`${UPDATER_URL}:${WS_PORT}`)
+    const connect = () => updater.open(createBackoff()).catch(
+      error => {
+        console.error('xo-server-cloud: fail to connect to updater', error)
+
+        return connect()
+      }
+    )
+    updater
+      .on('close', connect)
+      .on('scheduledAttempt', ({ delay }) => {
+        console.warn('xo-server-cloud: next attempt in %s ms', delay)
+      })
+    connect()
+  }
+
+  unload () {
+    this._unsetApiMethods()
+    this._unsetRequestResource()
+  }
+
+  // ----------------------------------------------------------------
+
+  async _getCatalog () {
+    const catalog = await this._updater.call('getResourceCatalog')
+
+    if (!catalog) {
+      throw new Error('cannot get catalog')
+    }
+
+    return catalog
+  }
+
+  // ----------------------------------------------------------------
+
+  async _getNamespaces () {
+    const catalog = await this._getCatalog()
+
+    if (!catalog._namespaces) {
+      throw new Error('cannot get namespaces')
+    }
+
+    return catalog._namespaces
+  }
+
+  // ----------------------------------------------------------------
+
+  async _registerResource (namespace) {
+    const _namespace = (await this._getNamespaces())[namespace]
+
+    if (_namespace.registered || _namespace.pending) {
+      return new Error(`already registered for ${namespace}`)
+    }
+
+    return this._updater.call('registerResource', { namespace })
+  }
+
+  // ----------------------------------------------------------------
+
+  async _getNamespaceCatalog (namespace) {
+    const namespaceCatalog = (await this._getCatalog())[namespace]
+
+    if (!namespaceCatalog) {
+      throw new Error(`cannot get catalog: ${namespace} not registered`)
+    }
+
+    return namespaceCatalog
+  }
+
+  // ----------------------------------------------------------------
+
+  async _requestResource (namespace, id, version) {
+    const _namespace = (await this._getNamespaces())[namespace]
+
+    if (!_namespace || !_namespace.registered) {
+      throw new Error(`cannot get resource: ${namespace} not registered`)
+    }
+
+    const namespaceCatalog = await this._getNamespaceCatalog(namespace)
+
+    const downloadToken = await this._updater.call('getResourceDownloadToken', {
+      token: namespaceCatalog._token,
+      id,
+      version
+    })
+
+    if (!downloadToken) {
+      throw new Error('cannot get download token')
+    }
+
+    const req = request.get(`${UPDATER_URL}:${HTTP_PORT}/`)
+      .set('Authorization', `Bearer ${downloadToken}`)
+
+    // Impossible to pipe the response directly: https://github.com/visionmedia/superagent/issues/1187
+    const pt = new PassThrough()
+    req.pipe(pt)
+    pt.length = (await eventToPromise(req, 'response')).headers['content-length']
+
+    return pt
+  }
+}
+
+export default opts => new XoServerCloud(opts)

packages/xo-server-load-balancer/.npmignore

@@ -0,0 +1,10 @@
+/examples/
+example.js
+example.js.map
+*.example.js
+*.example.js.map
+
+/test/
+/tests/
+*.spec.js
+*.spec.js.map

packages/xo-server-load-balancer/README.md

@@ -0,0 +1,53 @@
+# xo-server-load-balancer [![Build Status](https://travis-ci.org/vatesfr/xen-orchestra.png?branch=master)](https://travis-ci.org/vatesfr/xen-orchestra)
+
+XO-Server plugin that allows load balancing.
+
+## Install
+
+Go inside your `xo-server` folder and install it:
+
+```
+> npm install --global xo-server-load-balancer
+```
+
+## Usage
+
+Like all other xo-server plugins, it can be configured directly via
+the web interface, see [the plugin documentation](https://xen-orchestra.com/docs/plugins.html).
+
+## Development
+
+### Installing dependencies
+
+```
+> npm install
+```
+
+### Compilation
+
+The sources files are watched and automatically recompiled on changes.
+
+```
+> npm run dev
+```
+
+### Tests
+
+```
+> npm run test-dev
+```
+
+## Contributions
+
+Contributions are *very* welcomed, either on the documentation or on
+the code.
+
+You may:
+
+- report any [issue](https://github.com/vatesfr/xo-web/issues)
+  you've encountered;
+- fork and create a pull request.
+
+## License
+
+AGPL3 © [Vates SAS](http://vates.fr)

packages/xo-server-load-balancer/package.json

@@ -0,0 +1,72 @@
+{
+  "name": "xo-server-load-balancer",
+  "version": "0.3.1",
+  "license": "AGPL-3.0",
+  "description": "Load balancer for XO-Server",
+  "keywords": [
+    "load",
+    "balancer",
+    "server",
+    "pool",
+    "host"
+  ],
+  "homepage": "https://github.com/vatesfr/xen-orchestra/tree/master/packages/xo-server-load-balancer",
+  "bugs": "https://github.com/vatesfr/xo-web/issues",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/vatesfr/xen-orchestra.git"
+  },
+  "author": {
+    "name": "Julien Fontanet",
+    "email": "julien.fontanet@isonoe.net"
+  },
+  "preferGlobal": false,
+  "main": "dist/",
+  "bin": {},
+  "files": [
+    "dist/"
+  ],
+  "engines": {
+    "node": ">=4"
+  },
+  "dependencies": {
+    "babel-runtime": "^6.11.6",
+    "cron": "^1.1.0",
+    "event-to-promise": "^0.7.0",
+    "lodash": "^4.16.2"
+  },
+  "devDependencies": {
+    "babel-cli": "^6.16.0",
+    "babel-eslint": "^7.0.0",
+    "babel-plugin-lodash": "^3.2.9",
+    "babel-plugin-transform-runtime": "^6.15.0",
+    "babel-preset-es2015": "^6.16.0",
+    "babel-preset-stage-0": "^6.16.0",
+    "dependency-check": "^2.5.1",
+    "standard": "^8.2.0"
+  },
+  "scripts": {
+    "build": "NODE_ENV=production babel --source-maps --out-dir=dist/ src/",
+    "depcheck": "dependency-check ./package.json",
+    "dev": "NODE_DEV=development babel --watch --source-maps --out-dir=dist/ src/",
+    "lint": "standard",
+    "posttest": "yarn run lint && yarn run depcheck",
+    "prepublish": "yarn run build"
+  },
+  "babel": {
+    "plugins": [
+      "transform-runtime",
+      "lodash"
+    ],
+    "presets": [
+      "es2015",
+      "stage-0"
+    ]
+  },
+  "standard": {
+    "ignore": [
+      "dist"
+    ],
+    "parser": "babel-eslint"
+  }
+}

packages/xo-server-load-balancer/src/density-plan.js

@@ -0,0 +1,225 @@
+import { clone, filter, map as mapToArray } from 'lodash'
+
+import Plan from './plan'
+import { debug } from './utils'
+
+// ===================================================================
+
+export default class DensityPlan extends Plan {
+  _checkRessourcesThresholds (objects, averages) {
+    return filter(objects, object =>
+      averages[object.id].memoryFree > this._thresholds.memoryFree.low
+    )
+  }
+
+  async execute () {
+    const results = await this._findHostsToOptimize()
+
+    if (!results) {
+      return
+    }
+
+    const {
+      hosts,
+      toOptimize
+    } = results
+
+    let {
+      averages: hostsAverages
+    } = results
+
+    const pools = await this._getPlanPools()
+    let optimizationsCount = 0
+
+    for (const hostToOptimize of toOptimize) {
+      const {
+        id: hostId,
+        $poolId: poolId
+      } = hostToOptimize
+
+      const {
+        master: masterId
+      } = pools[poolId]
+
+      // Avoid master optimization.
+      if (masterId === hostId) {
+        continue
+      }
+
+      // A host to optimize needs the ability to be restarted.
+      if (hostToOptimize.powerOnMode === '') {
+        debug(`Host (${hostId}) does not have a power on mode.`)
+        continue
+      }
+
+      let poolMaster // Pool master.
+      const poolHosts = [] // Without master.
+      const masters = [] // Without the master of this loop.
+      const otherHosts = []
+
+      for (const dest of hosts) {
+        const {
+          id: destId,
+          $poolId: destPoolId
+        } = dest
+
+        // Destination host != Host to optimize!
+        if (destId === hostId) {
+          continue
+        }
+
+        if (destPoolId === poolId) {
+          if (destId === masterId) {
+            poolMaster = dest
+          } else {
+            poolHosts.push(dest)
+          }
+        } else if (destId === pools[destPoolId].master) {
+          masters.push(dest)
+        } else {
+          otherHosts.push(dest)
+        }
+      }
+
+      const simulResults = await this._simulate({
+        host: hostToOptimize,
+        destinations: [
+          [ poolMaster ],
+          poolHosts,
+          masters,
+          otherHosts
+        ],
+        hostsAverages: clone(hostsAverages)
+      })
+
+      if (simulResults) {
+        // Update stats.
+        hostsAverages = simulResults.hostsAverages
+
+        // Migrate.
+        await this._migrate(hostId, simulResults.moves)
+        optimizationsCount++
+      }
+    }
+
+    debug(`Density mode: ${optimizationsCount} optimizations.`)
+  }
+
+  async _simulate ({ host, destinations, hostsAverages }) {
+    const { id: hostId } = host
+
+    debug(`Try to optimize Host (${hostId}).`)
+
+    const vms = await this._getVms(hostId)
+    const vmsAverages = await this._getVmsAverages(vms, host)
+
+    for (const vm of vms) {
+      if (!vm.xenTools) {
+        debug(`VM (${vm.id}) of Host (${hostId}) does not support pool migration.`)
+        return
+      }
+    }
+
+    // Sort vms by amount of memory. (+ -> -)
+    vms.sort((a, b) =>
+      vmsAverages[b.id].memory - vmsAverages[a.id].memory
+    )
+
+    const simulResults = {
+      hostsAverages,
+      moves: []
+    }
+
+    // Try to find a destination for each VM.
+    for (const vm of vms) {
+      let move
+
+      // Simulate the VM move on a destinations set.
+      for (const subDestinations of destinations) {
+        move = this._testMigration({
+          vm,
+          destinations: subDestinations,
+          hostsAverages,
+          vmsAverages
+        })
+
+        // Destination found.
+        if (move) {
+          simulResults.moves.push(move)
+          break
+        }
+      }
+
+      // Unable to move a VM.
+      if (!move) {
+        return
+      }
+    }
+
+    // Done.
+    return simulResults
+  }
+
+  // Test if a VM migration on a destination (of a destinations set) is possible.
+  _testMigration ({ vm, destinations, hostsAverages, vmsAverages }) {
+    const {
+      _thresholds: {
+        critical: criticalThreshold
+      }
+    } = this
+
+    // Sort the destinations by available memory. (- -> +)
+    destinations.sort((a, b) =>
+      hostsAverages[a.id].memoryFree - hostsAverages[b.id].memoryFree
+    )
+
+    for (const destination of destinations) {
+      const destinationAverages = hostsAverages[destination.id]
+      const vmAverages = vmsAverages[vm.id]
+
+      // Unable to move the VM.
+      if (
+        destinationAverages.cpu + vmAverages.cpu >= criticalThreshold ||
+        destinationAverages.memoryFree - vmAverages.memory <= criticalThreshold
+      ) {
+        continue
+      }
+
+      // Move ok. Update stats.
+      destinationAverages.cpu += vmAverages.cpu
+      destinationAverages.memoryFree -= vmAverages.memory
+
+      // Available movement.
+      return {
+        vm,
+        destination
+      }
+    }
+  }
+
+  // Migrate the VMs of one host.
+  // Try to shutdown the VMs host.
+  async _migrate (hostId, moves) {
+    const xapiSrc = this.xo.getXapi(hostId)
+
+    await Promise.all(
+      mapToArray(moves, move => {
+        const {
+          vm,
+          destination
+        } = move
+        const xapiDest = this.xo.getXapi(destination)
+        debug(`Migrate VM (${vm.id}) to Host (${destination.id}) from Host (${vm.$container}).`)
+        return xapiDest.migrateVm(vm._xapiId, this.xo.getXapi(destination), destination._xapiId)
+      })
+    )
+
+    debug(`Shutdown Host (${hostId}).`)
+
+    try {
+      await xapiSrc.shutdownHost(hostId)
+    } catch (error) {
+      debug(`Unable to shutdown Host (${hostId}).`, error)
+    }
+  }
+}

packages/xo-server-load-balancer/src/index.js

@@ -0,0 +1,203 @@
+import EventEmitter from 'events'
+import eventToPromise from 'event-to-promise'
+import { CronJob } from 'cron'
+import { intersection, map as mapToArray, uniq } from 'lodash'
+
+import DensityPlan from './density-plan'
+import PerformancePlan from './performance-plan'
+import {
+  DEFAULT_CRITICAL_THRESHOLD_CPU,
+  DEFAULT_CRITICAL_THRESHOLD_MEMORY_FREE
+} from './plan'
+import {
+  EXECUTION_DELAY,
+  debug
+} from './utils'
+
+class Emitter extends EventEmitter {}
+
+// ===================================================================
+
+const PERFORMANCE_MODE = 0
+const DENSITY_MODE = 1
+
+// ===================================================================
+
+export const configurationSchema = {
+  type: 'object',
+
+  properties: {
+    plans: {
+      type: 'array',
+      description: 'an array of plans',
+      title: 'Plans',
+
+      items: {
+        type: 'object',
+        title: 'Plan',
+
+        properties: {
+          name: {
+            type: 'string',
+            title: 'Name'
+          },
+
+          mode: {
+            enum: [ 'Performance mode', 'Density mode' ],
+            title: 'Mode'
+          },
+
+          pools: {
+            type: 'array',
+            description: 'list of pools where to apply the policy',
+
+            items: {
+              type: 'string',
+              $type: 'Pool'
+            }
+          },
+
+          thresholds: {
+            type: 'object',
+            title: 'Critical thresholds',
+
+            properties: {
+              cpu: {
+                type: 'integer',
+                title: 'CPU (%)',
+                default: DEFAULT_CRITICAL_THRESHOLD_CPU
+              },
+              memoryFree: {
+                type: 'integer',
+                title: 'RAM, Free memory (MB)',
+                default: DEFAULT_CRITICAL_THRESHOLD_MEMORY_FREE
+              }
+            }
+          },
+
+          excludedHosts: {
+            type: 'array',
+            title: 'Excluded hosts',
+            description: 'list of hosts that are not affected by the plan',
+
+            items: {
+              type: 'string',
+              $type: 'Host'
+            }
+          }
+        },
+
+        required: [ 'name', 'mode', 'pools' ]
+      },
+
+      minItems: 1
+    }
+  },
+
+  additionalProperties: false
+}
+
+// ===================================================================
+
+// Create a job not enabled by default.
+// A job is a cron task, a running and enabled state.
+const makeJob = (cronPattern, fn) => {
+  const job = {
+    running: false,
+    emitter: new Emitter()
+  }
+
+  job.cron = new CronJob(cronPattern, async () => {
+    if (job.running) {
+      return
+    }
+
+    job.running = true
+
+    try {
+      await fn()
+    } catch (error) {
+      console.error('[WARN] scheduled function:', error && error.stack || error)
+    } finally {
+      job.running = false
+      job.emitter.emit('finish')
+    }
+  })
+
+  job.isEnabled = () => job.cron.running
+
+  return job
+}
+
+// ===================================================================
+// ===================================================================
+
+class LoadBalancerPlugin {
+  constructor (xo) {
+    this.xo = xo
+    this._job = makeJob(`*/${EXECUTION_DELAY} * * * *`, ::this._executePlans)
+    this._emitter
+  }
+
+  async configure ({ plans }) {
+    const job = this._job
+    const enabled = job.isEnabled()
+
+    if (enabled) {
+      job.cron.stop()
+    }
+
+    // Wait until all old plans stopped running.
+    if (job.running) {
+      await eventToPromise(job.emitter, 'finish')
+    }
+
+    this._plans = []
+    this._poolIds = [] // Used pools.
+
+    if (plans) {
+      for (const plan of plans) {
+        this._addPlan(plan.mode === 'Performance mode' ? PERFORMANCE_MODE : DENSITY_MODE, plan)
+      }
+    }
+
+    if (enabled) {
+      job.cron.start()
+    }
+  }
+
+  load () {
+    this._job.cron.start()
+  }
+
+  unload () {
+    this._job.cron.stop()
+  }
+
+  _addPlan (mode, { name, pools, ...options }) {
+    pools = uniq(pools)
+
+    // Check already used pools.
+    if (intersection(pools, this._poolIds).length > 0) {
+      throw new Error(`Pool(s) already included in an other plan: ${pools}`)
+    }
+
+    this._poolIds = this._poolIds.concat(pools)
+    this._plans.push(mode === PERFORMANCE_MODE
+      ? new PerformancePlan(this.xo, name, pools, options)
+      : new DensityPlan(this.xo, name, pools, options)
+    )
+  }
+
+  _executePlans () {
+    debug('Execute plans!')
+
+    return Promise.all(
+      mapToArray(this._plans, plan => plan.execute())
+    )
+  }
+}
+
+// ===================================================================
+
+export default ({ xo }) => new LoadBalancerPlugin(xo)

packages/xo-server-load-balancer/src/performance-plan.js

@@ -0,0 +1,138 @@
+import { filter, find, map as mapToArray } from 'lodash'
+
+import Plan from './plan'
+import { debug } from './utils'
+
+// Compare a list of objects and give the best.
+function searchBestObject (objects, fun) {
+  let object = objects[0]
+
+  for (let i = 1; i < objects.length; i++) {
+    if (fun(object, objects[i]) > 0) {
+      object = objects[i]
+    }
+  }
+
+  return object
+}
+
+// ===================================================================
+
+export default class PerformancePlan extends Plan {
+  _checkRessourcesThresholds (objects, averages) {
+    return filter(objects, object => {
+      const objectAverages = averages[object.id]
+
+      return (
+        objectAverages.cpu >= this._thresholds.cpu.high ||
+        objectAverages.memoryFree <= this._thresholds.memoryFree.high
+      )
+    })
+  }
+
+  async execute () {
+    // Try to power on a hosts set.
+    try {
+      await Promise.all(
+        mapToArray(
+          filter(this._getHosts({ powerState: 'Halted' }), host => host.powerOnMode !== ''),
+          host => {
+            const { id } = host
+            return this.xo.getXapi(id).powerOnHost(id)
+          }
+        )
+      )
+    } catch (error) {
+      console.error(error)
+    }
+
+    const results = await this._findHostsToOptimize()
+
+    if (!results) {
+      return
+    }
+
+    const {
+      averages,
+      toOptimize
+    } = results
+    let { hosts } = results
+
+    toOptimize.sort((a, b) => {
+      a = averages[a.id]
+      b = averages[b.id]
+
+      return (b.cpu - a.cpu) || (a.memoryFree - b.memoryFree)
+    })
+
+    for (const exceededHost of toOptimize) {
+      const { id } = exceededHost
+
+      debug(`Try to optimize Host (${exceededHost.id}).`)
+      hosts = filter(hosts, host => host.id !== id)
+
+      // Search bests combinations for the worst host.
+      await this._optimize({
+        exceededHost,
+        hosts,
+        hostsAverages: averages
+      })
+    }
+  }
+
+  async _optimize ({ exceededHost, hosts, hostsAverages }) {
+    const vms = await this._getVms(exceededHost.id)
+    const vmsAverages = await this._getVmsAverages(vms, exceededHost)
+
+    // Sort vms by cpu usage. (lower to higher)
+    vms.sort((a, b) =>
+      vmsAverages[b.id].cpu - vmsAverages[a.id].cpu
+    )
+
+    const exceededAverages = hostsAverages[exceededHost.id]
+    const promises = []
+
+    const xapiSrc = this.xo.getXapi(exceededHost)
+    let optimizationsCount = 0
+
+    const searchFunction = (a, b) => hostsAverages[b.id].cpu - hostsAverages[a.id].cpu
+
+    for (const vm of vms) {
+      // Search host with lower cpu usage in the same pool first. In other pool if necessary.
+      let destination = searchBestObject(find(hosts, host => host.$poolId === vm.$poolId), searchFunction)
+
+      if (!destination) {
+        destination = searchBestObject(hosts, searchFunction)
+      }
+
+      const destinationAverages = hostsAverages[destination.id]
+      const vmAverages = vmsAverages[vm.id]
+
+      // Unable to move the vm.
+      if (
+        exceededAverages.cpu - vmAverages.cpu < destinationAverages.cpu + vmAverages.cpu ||
+        destinationAverages.memoryFree > vmAverages.memory
+      ) {
+        continue
+      }
+
+      exceededAverages.cpu -= vmAverages.cpu
+      destinationAverages.cpu += vmAverages.cpu
+
+      exceededAverages.memoryFree += vmAverages.memory
+      destinationAverages.memoryFree -= vmAverages.memory
+
+      debug(`Migrate VM (${vm.id}) to Host (${destination.id}) from Host (${exceededHost.id}).`)
+      optimizationsCount++
+
+      promises.push(
+        xapiSrc.migrateVm(vm._xapiId, this.xo.getXapi(destination), destination._xapiId)
+      )
+    }
+
+    await Promise.all(promises)
+    debug(`Performance mode: ${optimizationsCount} optimizations for Host (${exceededHost.id}).`)
+
+    return
+  }
+}

packages/xo-server-load-balancer/src/plan.js

@@ -0,0 +1,253 @@
+import { filter, includes, map as mapToArray } from 'lodash'
+
+import {
+  EXECUTION_DELAY,
+  debug
+} from './utils'
+
+const MINUTES_OF_HISTORICAL_DATA = 30
+
+// CPU threshold in percent.
+export const DEFAULT_CRITICAL_THRESHOLD_CPU = 90.0
+
+// Memory threshold in MB.
+export const DEFAULT_CRITICAL_THRESHOLD_MEMORY_FREE = 64.0
+
+// Thresholds factors.
+const HIGH_THRESHOLD_FACTOR = 0.85
+const LOW_THRESHOLD_FACTOR = 0.25
+
+const HIGH_THRESHOLD_MEMORY_FREE_FACTOR = 1.25
+const LOW_THRESHOLD_MEMORY_FREE_FACTOR = 20.0
+
+const numberOrDefault = (value, def) => (value >= 0) ? value : def
+
+// ===================================================================
+// Averages.
+// ===================================================================
+
+function computeAverage (values, nPoints = values.length) {
+  let sum = 0
+  let tot = 0
+
+  const { length } = values
+
+  for (let i = length - nPoints; i < length; i++) {
+    const value = values[i]
+
+    sum += value || 0
+
+    if (value) {
+      tot += 1
+    }
+  }
+
+  return sum / tot
+}
+
+function computeRessourcesAverage (objects, objectsStats, nPoints) {
+  const averages = {}
+
+  for (const object of objects) {
+    const { id } = object
+    const { stats } = objectsStats[id]
+
+    averages[id] = {
+      cpu: computeAverage(
+        mapToArray(stats.cpus, cpu => computeAverage(cpu, nPoints))
+      ),
+      nCpus: stats.cpus.length,
+      memoryFree: computeAverage(stats.memoryFree, nPoints),
+      memory: computeAverage(stats.memory, nPoints)
+    }
+  }
+
+  return averages
+}
+
+function computeRessourcesAverageWithWeight (averages1, averages2, ratio) {
+  const averages = {}
+
+  for (const id in averages1) {
+    const objectAverages = averages[id] = {}
+
+    for (const averageName in averages1[id]) {
+      objectAverages[averageName] = averages1[id][averageName] * ratio + averages2[id][averageName] * (1 - ratio)
+    }
+  }
+
+  return averages
+}
+
+function setRealCpuAverageOfVms (vms, vmsAverages, nCpus) {
+  for (const vm of vms) {
+    const averages = vmsAverages[vm.id]
+    averages.cpu *= averages.nCpus / nCpus
+  }
+}
+
+// ===================================================================
+
+export default class Plan {
+  constructor (xo, name, poolIds, {
+    excludedHosts,
+    thresholds
+  } = {}) {
+    this.xo = xo
+    this._name = name
+    this._poolIds = poolIds
+    this._excludedHosts = excludedHosts
+    this._thresholds = {
+      cpu: {
+        critical: numberOrDefault(thresholds && thresholds.cpu, DEFAULT_CRITICAL_THRESHOLD_CPU)
+      },
+      memoryFree: {
+        critical: numberOrDefault(thresholds && thresholds.memoryFree, DEFAULT_CRITICAL_THRESHOLD_MEMORY_FREE) * 1024
+      }
+    }
+
+    for (const key in this._thresholds) {
+      const attr = this._thresholds[key]
+      const { critical } = attr
+
+      if (key === 'memoryFree') {
+        attr.high = critical * HIGH_THRESHOLD_MEMORY_FREE_FACTOR
+        attr.low = critical * LOW_THRESHOLD_MEMORY_FREE_FACTOR
+      } else {
+        attr.high = critical * HIGH_THRESHOLD_FACTOR
+        attr.low = critical * LOW_THRESHOLD_FACTOR
+      }
+    }
+  }
+
+  execute () {
+    throw new Error('Not implemented')
+  }
+
+  // ===================================================================
+  // Get hosts to optimize.
+  // ===================================================================
+
+  async _findHostsToOptimize () {
+    const hosts = this._getHosts()
+    const hostsStats = await this._getHostsStats(hosts, 'minutes')
+
+    // Check if a ressource's utilization exceeds threshold.
+    const avgNow = computeRessourcesAverage(hosts, hostsStats, EXECUTION_DELAY)
+    let toOptimize = this._checkRessourcesThresholds(hosts, avgNow)
+
+    // No ressource's utilization problem.
+    if (toOptimize.length === 0) {
+      debug('No hosts to optimize.')
+      return
+    }
+
+    // Check in the last 30 min interval with ratio.
+    const avgBefore = computeRessourcesAverage(hosts, hostsStats, MINUTES_OF_HISTORICAL_DATA)
+    const avgWithRatio = computeRessourcesAverageWithWeight(avgNow, avgBefore, 0.75)
+
+    toOptimize = this._checkRessourcesThresholds(toOptimize, avgWithRatio)
+
+    // No ressource's utilization problem.
+    if (toOptimize.length === 0) {
+      debug('No hosts to optimize.')
+      return
+    }
+
+    return {
+      toOptimize,
+      averages: avgWithRatio,
+      hosts
+    }
+  }
+
+  _checkRessourcesThresholds () {
+    throw new Error('Not implemented')
+  }
+
+  // ===================================================================
+  // Get objects.
+  // ===================================================================
+
+  _getPlanPools () {
+    const pools = {}
+
+    try {
+      for (const poolId of this._poolIds) {
+        pools[poolId] = this.xo.getObject(poolId)
+      }
+    } catch (_) {
+      return {}
+    }
+
+    return pools
+  }
+
+  // Compute hosts for each pool. They can change over time.
+  _getHosts ({ powerState = 'Running' } = {}) {
+    return filter(this.xo.getObjects(), object => (
+      object.type === 'host' &&
+      includes(this._poolIds, object.$poolId) &&
+      object.power_state === powerState &&
+      !includes(this._excludedHosts, object.id)
+    ))
+  }
+
+  async _getVms (hostId) {
+    return filter(this.xo.getObjects(), object =>
+      object.type === 'VM' &&
+      object.power_state === 'Running' &&
+      object.$container === hostId
+    )
+  }
+
+  // ===================================================================
+  // Get stats.
+  // ===================================================================
+
+  async _getHostsStats (hosts, granularity) {
+    const hostsStats = {}
+
+    await Promise.all(mapToArray(hosts, host =>
+      this.xo.getXapiHostStats(host, granularity).then(hostStats => {
+        hostsStats[host.id] = {
+          nPoints: hostStats.stats.cpus[0].length,
+          stats: hostStats.stats,
+          averages: {}
+        }
+      })
+    ))
+
+    return hostsStats
+  }
+
+  async _getVmsStats (vms, granularity) {
+    const vmsStats = {}
+
+    await Promise.all(mapToArray(vms, vm =>
+      this.xo.getXapiVmStats(vm, granularity).then(vmStats => {
+        vmsStats[vm.id] = {
+          nPoints: vmStats.stats.cpus[0].length,
+          stats: vmStats.stats,
+          averages: {}
+        }
+      })
+    ))
+
+    return vmsStats
+  }
+
+  async _getVmsAverages (vms, host) {
+    const vmsStats = await this._getVmsStats(vms, 'minutes')
+    const vmsAverages = computeRessourcesAverageWithWeight(
+      computeRessourcesAverage(vms, vmsStats, EXECUTION_DELAY),
+      computeRessourcesAverage(vms, vmsStats, MINUTES_OF_HISTORICAL_DATA),
+      0.75
+    )
+
+    // Compute real CPU usage. Virtuals cpus to reals cpus.
+    setRealCpuAverageOfVms(vms, vmsAverages, host.CPUs.cpu_count)
+
+    return vmsAverages
+  }
+}