vendoring of treeprint library

vendor/github.com/xlab/treeprint/LICENSE

@@ -0,0 +1,20 @@
+The MIT License (MIT)
+Copyright © 2016 Maxim Kupriianov <max@kc.vc>
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the “Software”), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.

vendor/github.com/xlab/treeprint/README.md

@@ -0,0 +1,126 @@
+treeprint [![GoDoc](https://godoc.org/github.com/xlab/treeprint?status.svg)](https://godoc.org/github.com/xlab/treeprint) ![test coverage](https://img.shields.io/badge/coverage-68.6%25-green.svg)
+=========
+
+Package `treeprint` provides a simple ASCII tree composing tool.
+
+<a href="https://upload.wikimedia.org/wikipedia/commons/5/58/ENC_SYSTEME_FIGURE.jpeg"><img alt="SYSTEME FIGURE" src="https://upload.wikimedia.org/wikipedia/commons/thumb/5/58/ENC_SYSTEME_FIGURE.jpeg/896px-ENC_SYSTEME_FIGURE.jpeg" align="left" width="300"></a>
+
+If you are familiar with the [tree](http://mama.indstate.edu/users/ice/tree/) utility that is a recursive directory listing command that produces a depth indented listing of files, then you have the idea of what it would look like.
+
+On my system the command yields the following
+
+```
+ $ tree
+.
+├── LICENSE
+├── README.md
+├── treeprint.go
+└── treeprint_test.go
+
+0 directories, 4 files
+```
+
+and I'd like to have the same format for my Go data structures when I print them.
+
+## Installation
+
+```
+$ go get github.com/xlab/treeprint
+```
+
+## Concept of work
+
+The general idea is that you initialise a new tree with `treeprint.New()` and then add nodes and
+branches into it. Use `AddNode()` when you want add a node on the same level as the target or
+use `AddBranch()` when you want to go a level deeper. So `tree.AddBranch().AddNode().AddNode()` would
+create a new level with two distinct nodes on it. So `tree.AddNode().AddNode()` is a flat thing and
+`tree.AddBranch().AddBranch().AddBranch()` is a high thing. Use `String()` or `Bytes()` on a branch
+to render a subtree, or use it on the root to print the whole tree.
+
+## Use cases
+
+When you want to render a complex data structure:
+
+```go
+func main() {
+    tree := treeprint.New()
+
+    // create a new branch in the root
+    one := tree.AddBranch("one")
+
+    // add some nodes
+    one.AddNode("subnode1").AddNode("subnode2")
+
+    // create a new sub-branch
+    one.AddBranch("two").
+        AddNode("subnode1").AddNode("subnode2"). // add some nodes
+        AddBranch("three"). // add a new sub-branch
+        AddNode("subnode1").AddNode("subnode2") // add some nodes too
+
+    // add one more node that should surround the inner branch
+    one.AddNode("subnode3")
+
+    // add a new node to the root
+    tree.AddNode("outernode")
+
+    fmt.Println(tree.String())
+}
+```
+
+Will give you:
+
+```
+.
+├── one
+│   ├── subnode1
+│   ├── subnode2
+│   ├── two
+│   │   ├── subnode1
+│   │   ├── subnode2
+│   │   └── three
+│   │       ├── subnode1
+│   │       └── subnode2
+│   └── subnode3
+└── outernode
+```
+
+Another case, when you have to make a tree where any leaf may have some meta-data (as `tree` is capable of it):
+
+```go
+func main {
+    tree := treeprint.New()
+
+    tree.AddNode("Dockerfile")
+    tree.AddNode("Makefile")
+    tree.AddNode("aws.sh")
+    tree.AddMetaBranch(" 204", "bin").
+        AddNode("dbmaker").AddNode("someserver").AddNode("testtool")
+    tree.AddMetaBranch(" 374", "deploy").
+        AddNode("Makefile").AddNode("bootstrap.sh")
+    tree.AddMetaNode("122K", "testtool.a")
+
+    fmt.Println(tree.String())
+}
+```
+
+Output:
+
+```
+.
+├── Dockerfile
+├── Makefile
+├── aws.sh
+├── [ 204]  bin
+│   ├── dbmaker
+│   ├── someserver
+│   └── testtool
+├── [ 374]  deploy
+│   ├── Makefile
+│   └── bootstrap.sh
+└── [122K]  testtool.a
+```
+
+Yay! So it works.
+
+## License
+MIT

vendor/github.com/xlab/treeprint/helpers.go

@@ -0,0 +1,47 @@
+package treeprint
+
+import (
+	"reflect"
+	"strings"
+)
+
+func isEmpty(v *reflect.Value) bool {
+	switch v.Kind() {
+	case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
+		return v.Len() == 0
+	case reflect.Bool:
+		return !v.Bool()
+	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
+		return v.Int() == 0
+	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
+		return v.Uint() == 0
+	case reflect.Float32, reflect.Float64:
+		return v.Float() == 0
+	case reflect.Interface, reflect.Ptr:
+		return v.IsNil()
+	}
+	return false
+}
+
+func tagSpec(tag string) (name string, omit bool) {
+	parts := strings.Split(tag, ",")
+	if len(parts) < 2 {
+		return tag, false
+	}
+	if parts[1] == "omitempty" {
+		return parts[0], true
+	}
+	return parts[0], false
+}
+
+func filterTags(tag reflect.StructTag) string {
+	tags := strings.Split(string(tag), " ")
+	filtered := make([]string, 0, len(tags))
+	for i := range tags {
+		if strings.HasPrefix(tags[i], "tree:") {
+			continue
+		}
+		filtered = append(filtered, tags[i])
+	}
+	return strings.Join(filtered, " ")
+}

vendor/github.com/xlab/treeprint/struct.go

@@ -0,0 +1,340 @@
+package treeprint
+
+import (
+	"fmt"
+	"reflect"
+	"strings"
+)
+
+type StructTreeOption int
+
+const (
+	StructNameTree StructTreeOption = iota
+	StructValueTree
+	StructTagTree
+	StructTypeTree
+	StructTypeSizeTree
+)
+
+func FromStruct(v interface{}, opt ...StructTreeOption) (Tree, error) {
+	var treeOpt StructTreeOption
+	if len(opt) > 0 {
+		treeOpt = opt[0]
+	}
+	switch treeOpt {
+	case StructNameTree:
+		tree := New()
+		err := nameTree(tree, v)
+		return tree, err
+	case StructValueTree:
+		tree := New()
+		err := valueTree(tree, v)
+		return tree, err
+	case StructTagTree:
+		tree := New()
+		err := tagTree(tree, v)
+		return tree, err
+	case StructTypeTree:
+		tree := New()
+		err := typeTree(tree, v)
+		return tree, err
+	case StructTypeSizeTree:
+		tree := New()
+		err := typeSizeTree(tree, v)
+		return tree, err
+	default:
+		err := fmt.Errorf("treeprint: invalid StructTreeOption %v", treeOpt)
+		return nil, err
+	}
+}
+
+type FmtFunc func(name string, v interface{}) (string, bool)
+
+func FromStructWithMeta(v interface{}, fmtFunc FmtFunc) (Tree, error) {
+	if fmtFunc == nil {
+		tree := New()
+		err := nameTree(tree, v)
+		return tree, err
+	}
+	tree := New()
+	err := metaTree(tree, v, fmtFunc)
+	return tree, err
+}
+
+func Repr(v interface{}) string {
+	tree := New()
+	vType := reflect.TypeOf(v)
+	vValue := reflect.ValueOf(v)
+	_, val, isStruct := getValue(vType, &vValue)
+	if !isStruct {
+		return fmt.Sprintf("%+v", val.Interface())
+	}
+	err := valueTree(tree, val.Interface())
+	if err != nil {
+		return err.Error()
+	}
+	return tree.String()
+}
+
+func nameTree(tree Tree, v interface{}) error {
+	typ, val, err := checkType(v)
+	if err != nil {
+		return err
+	}
+	fields := typ.NumField()
+	for i := 0; i < fields; i++ {
+		field := typ.Field(i)
+		fieldValue := val.Field(i)
+		name, skip, omit := getMeta(field.Name, field.Tag)
+		if skip || omit && isEmpty(&fieldValue) {
+			continue
+		}
+		typ, val, isStruct := getValue(field.Type, &fieldValue)
+		if !val.CanSet() {
+			continue
+		}
+		if !isStruct {
+			tree.AddNode(name)
+			continue
+		} else if subNum := typ.NumField(); subNum == 0 {
+			tree.AddNode(name)
+			continue
+		}
+		branch := tree.AddBranch(name)
+		if err := nameTree(branch, val.Interface()); err != nil {
+			err := fmt.Errorf("%v on struct branch %s", name)
+			return err
+		}
+	}
+	return nil
+}
+
+func getMeta(fieldName string, tag reflect.StructTag) (name string, skip, omit bool) {
+	if tagStr := tag.Get("tree"); len(tagStr) > 0 {
+		name, omit = tagSpec(tagStr)
+	}
+	if name == "-" {
+		return fieldName, true, omit
+	}
+	if len(name) == 0 {
+		name = fieldName
+	} else if trimmed := strings.TrimSpace(name); len(trimmed) == 0 {
+		name = fieldName
+	}
+	return
+}
+
+func valueTree(tree Tree, v interface{}) error {
+	typ, val, err := checkType(v)
+	if err != nil {
+		return err
+	}
+	fields := typ.NumField()
+	for i := 0; i < fields; i++ {
+		field := typ.Field(i)
+		fieldValue := val.Field(i)
+		name, skip, omit := getMeta(field.Name, field.Tag)
+		if skip || omit && isEmpty(&fieldValue) {
+			continue
+		}
+		typ, val, isStruct := getValue(field.Type, &fieldValue)
+		if !val.CanSet() {
+			continue
+		}
+		if !isStruct {
+			tree.AddMetaNode(val.Interface(), name)
+			continue
+		} else if subNum := typ.NumField(); subNum == 0 {
+			tree.AddMetaNode(val.Interface(), name)
+			continue
+		}
+		branch := tree.AddBranch(name)
+		if err := valueTree(branch, val.Interface()); err != nil {
+			err := fmt.Errorf("%v on struct branch %s", name)
+			return err
+		}
+	}
+	return nil
+}
+
+func tagTree(tree Tree, v interface{}) error {
+	typ, val, err := checkType(v)
+	if err != nil {
+		return err
+	}
+	fields := typ.NumField()
+	for i := 0; i < fields; i++ {
+		field := typ.Field(i)
+		fieldValue := val.Field(i)
+		name, skip, omit := getMeta(field.Name, field.Tag)
+		if skip || omit && isEmpty(&fieldValue) {
+			continue
+		}
+		filteredTag := filterTags(field.Tag)
+		typ, val, isStruct := getValue(field.Type, &fieldValue)
+		if !val.CanSet() {
+			continue
+		}
+		if !isStruct {
+			tree.AddMetaNode(filteredTag, name)
+			continue
+		} else if subNum := typ.NumField(); subNum == 0 {
+			tree.AddMetaNode(filteredTag, name)
+			continue
+		}
+		branch := tree.AddMetaBranch(filteredTag, name)
+		if err := tagTree(branch, val.Interface()); err != nil {
+			err := fmt.Errorf("%v on struct branch %s", name)
+			return err
+		}
+	}
+	return nil
+}
+
+func typeTree(tree Tree, v interface{}) error {
+	typ, val, err := checkType(v)
+	if err != nil {
+		return err
+	}
+	fields := typ.NumField()
+	for i := 0; i < fields; i++ {
+		field := typ.Field(i)
+		fieldValue := val.Field(i)
+		name, skip, omit := getMeta(field.Name, field.Tag)
+		if skip || omit && isEmpty(&fieldValue) {
+			continue
+		}
+		typ, val, isStruct := getValue(field.Type, &fieldValue)
+		if !val.CanSet() {
+			continue
+		}
+		typename := fmt.Sprintf("%T", val.Interface())
+		if !isStruct {
+			tree.AddMetaNode(typename, name)
+			continue
+		} else if subNum := typ.NumField(); subNum == 0 {
+			tree.AddMetaNode(typename, name)
+			continue
+		}
+		branch := tree.AddMetaBranch(typename, name)
+		if err := typeTree(branch, val.Interface()); err != nil {
+			err := fmt.Errorf("%v on struct branch %s", name)
+			return err
+		}
+	}
+	return nil
+}
+
+func typeSizeTree(tree Tree, v interface{}) error {
+	typ, val, err := checkType(v)
+	if err != nil {
+		return err
+	}
+	fields := typ.NumField()
+	for i := 0; i < fields; i++ {
+		field := typ.Field(i)
+		fieldValue := val.Field(i)
+		name, skip, omit := getMeta(field.Name, field.Tag)
+		if skip || omit && isEmpty(&fieldValue) {
+			continue
+		}
+		typ, val, isStruct := getValue(field.Type, &fieldValue)
+		if !val.CanSet() {
+			continue
+		}
+		typesize := typ.Size()
+		if !isStruct {
+			tree.AddMetaNode(typesize, name)
+			continue
+		} else if subNum := typ.NumField(); subNum == 0 {
+			tree.AddMetaNode(typesize, name)
+			continue
+		}
+		branch := tree.AddMetaBranch(typesize, name)
+		if err := typeSizeTree(branch, val.Interface()); err != nil {
+			err := fmt.Errorf("%v on struct branch %s", name)
+			return err
+		}
+	}
+	return nil
+}
+
+func metaTree(tree Tree, v interface{}, fmtFunc FmtFunc) error {
+	typ, val, err := checkType(v)
+	if err != nil {
+		return err
+	}
+	fields := typ.NumField()
+	for i := 0; i < fields; i++ {
+		field := typ.Field(i)
+		fieldValue := val.Field(i)
+		name, skip, omit := getMeta(field.Name, field.Tag)
+		if skip || omit && isEmpty(&fieldValue) {
+			continue
+		}
+		typ, val, isStruct := getValue(field.Type, &fieldValue)
+		if !val.CanSet() {
+			continue
+		}
+		formatted, show := fmtFunc(name, val.Interface())
+		if !isStruct {
+			if show {
+				tree.AddMetaNode(formatted, name)
+				continue
+			}
+			tree.AddNode(name)
+			continue
+		} else if subNum := typ.NumField(); subNum == 0 {
+			if show {
+				tree.AddMetaNode(formatted, name)
+				continue
+			}
+			tree.AddNode(name)
+			continue
+		}
+		var branch Tree
+		if show {
+			branch = tree.AddMetaBranch(formatted, name)
+		} else {
+			branch = tree.AddBranch(name)
+		}
+		if err := metaTree(branch, val.Interface(), fmtFunc); err != nil {
+			err := fmt.Errorf("%v on struct branch %s", name)
+			return err
+		}
+	}
+	return nil
+}
+
+func getValue(typ reflect.Type, val *reflect.Value) (reflect.Type, *reflect.Value, bool) {
+	switch typ.Kind() {
+	case reflect.Ptr:
+		typ = typ.Elem()
+		if typ.Kind() == reflect.Struct {
+			elem := val.Elem()
+			return typ, &elem, true
+		}
+	case reflect.Struct:
+		return typ, val, true
+	}
+	return typ, val, false
+}
+
+func checkType(v interface{}) (reflect.Type, *reflect.Value, error) {
+	typ := reflect.TypeOf(v)
+	val := reflect.ValueOf(v)
+	switch typ.Kind() {
+	case reflect.Ptr:
+		typ = typ.Elem()
+		if typ.Kind() != reflect.Struct {
+			err := fmt.Errorf("treeprint: %T is not a struct we could work with", v)
+			return nil, nil, err
+		}
+		val = val.Elem()
+	case reflect.Struct:
+	default:
+		err := fmt.Errorf("treeprint: %T is not a struct we could work with", v)
+		return nil, nil, err
+	}
+	return typ, &val, nil
+}

vendor/github.com/xlab/treeprint/treeprint.go

@@ -0,0 +1,184 @@
+// Package treeprint provides a simple ASCII tree composing tool.
+package treeprint
+
+import (
+	"bytes"
+	"fmt"
+	"io"
+	"reflect"
+)
+
+type Value interface{}
+type MetaValue interface{}
+
+// Tree represents a tree structure with leaf-nodes and branch-nodes.
+type Tree interface {
+	// AddNode adds a new node to a branch.
+	AddNode(v Value) Tree
+	// AddMetaNode adds a new node with meta value provided to a branch.
+	AddMetaNode(meta MetaValue, v Value) Tree
+	// AddBranch adds a new branch node (a level deeper).
+	AddBranch(v Value) Tree
+	// AddMetaBranch adds a new branch node (a level deeper) with meta value provided.
+	AddMetaBranch(meta MetaValue, v Value) Tree
+	// Branch converts a leaf-node to a branch-node,
+	// applying this on a branch-node does no effect.
+	Branch() Tree
+	// FindByMeta finds a node whose meta value matches the provided one by reflect.DeepEqual,
+	// returns nil if not found.
+	FindByMeta(meta MetaValue) Tree
+	// FindByValue finds a node whose value matches the provided one by reflect.DeepEqual,
+	// returns nil if not found.
+	FindByValue(value Value) Tree
+	// String renders the tree or subtree as a string.
+	String() string
+	// Bytes renders the tree or subtree as byteslice.
+	Bytes() []byte
+}
+
+type node struct {
+	Root  *node
+	Meta  MetaValue
+	Value Value
+	Nodes []*node
+}
+
+func (n *node) AddNode(v Value) Tree {
+	n.Nodes = append(n.Nodes, &node{
+		Root:  n,
+		Value: v,
+	})
+	if n.Root != nil {
+		return n.Root
+	}
+	return n
+}
+
+func (n *node) AddMetaNode(meta MetaValue, v Value) Tree {
+	n.Nodes = append(n.Nodes, &node{
+		Root:  n,
+		Meta:  meta,
+		Value: v,
+	})
+	if n.Root != nil {
+		return n.Root
+	}
+	return n
+}
+
+func (n *node) AddBranch(v Value) Tree {
+	branch := &node{
+		Value: v,
+	}
+	n.Nodes = append(n.Nodes, branch)
+	return branch
+}
+
+func (n *node) AddMetaBranch(meta MetaValue, v Value) Tree {
+	branch := &node{
+		Meta:  meta,
+		Value: v,
+	}
+	n.Nodes = append(n.Nodes, branch)
+	return branch
+}
+
+func (n *node) Branch() Tree {
+	n.Root = nil
+	return n
+}
+
+func (n *node) FindByMeta(meta MetaValue) Tree {
+	for _, node := range n.Nodes {
+		if reflect.DeepEqual(node.Meta, meta) {
+			return node
+		}
+		if v := node.FindByMeta(meta); v != nil {
+			return v
+		}
+	}
+	return nil
+}
+
+func (n *node) FindByValue(value Value) Tree {
+	for _, node := range n.Nodes {
+		if reflect.DeepEqual(node.Value, value) {
+			return node
+		}
+		if v := node.FindByMeta(value); v != nil {
+			return v
+		}
+	}
+	return nil
+}
+
+func (n *node) Bytes() []byte {
+	buf := new(bytes.Buffer)
+	level := 0
+	levelEnded := make(map[int]bool)
+	if n.Root == nil {
+		buf.WriteString(string(EdgeTypeStart))
+		buf.WriteByte('\n')
+	} else {
+		edge := EdgeTypeMid
+		if len(n.Nodes) == 0 {
+			edge = EdgeTypeEnd
+			levelEnded[level] = true
+		}
+		printValues(buf, 0, levelEnded, edge, n.Meta, n.Value)
+	}
+	if len(n.Nodes) > 0 {
+		printNodes(buf, level, levelEnded, n.Nodes)
+	}
+	return buf.Bytes()
+}
+
+func (n *node) String() string {
+	return string(n.Bytes())
+}
+
+func printNodes(wr io.Writer,
+	level int, levelEnded map[int]bool, nodes []*node) {
+
+	for i, node := range nodes {
+		edge := EdgeTypeMid
+		if i == len(nodes)-1 {
+			levelEnded[level] = true
+			edge = EdgeTypeEnd
+		}
+		printValues(wr, level, levelEnded, edge, node.Meta, node.Value)
+		if len(node.Nodes) > 0 {
+			printNodes(wr, level+1, levelEnded, node.Nodes)
+		}
+	}
+}
+
+func printValues(wr io.Writer,
+	level int, levelEnded map[int]bool, edge EdgeType, meta MetaValue, val Value) {
+
+	for i := 0; i < level; i++ {
+		if levelEnded[i] {
+			fmt.Fprint(wr, "    ")
+			continue
+		}
+		fmt.Fprintf(wr, "%s   ", EdgeTypeLink)
+	}
+	if meta != nil {
+		fmt.Fprintf(wr, "%s [%v]  %v\n", edge, meta, val)
+		return
+	}
+	fmt.Fprintf(wr, "%s %v\n", edge, val)
+}
+
+type EdgeType string
+
+const (
+	EdgeTypeStart EdgeType = "."
+	EdgeTypeLink  EdgeType = "│"
+	EdgeTypeMid   EdgeType = "├──"
+	EdgeTypeEnd   EdgeType = "└──"
+)
+
+func New() Tree {
+	return &node{}
+}

vendor/vendor.json

@@ -3210,6 +3210,12 @@
 			"revision": "ff0417f4272e480246b4507459b3f6ae721a87ac",
 			"revisionTime": "2017-02-25T17:21:24Z"
 		},
+		{
+			"checksumSHA1": "xtw+Llokq30p1Gn+Q8JBZ7NtE+I=",
+			"path": "github.com/xlab/treeprint",
+			"revision": "1d6e342255576c977e946a2384fc487a22d3fceb",
+			"revisionTime": "2016-10-29T10:40:18Z"
+		},
 		{
 			"checksumSHA1": "eXEiPlpDRaamJQ4vPX/9t333kQc=",
 			"comment": "v1.5.4-13-g75ce5fb",