migrate from govendor to dep

vendor/github.com/go-ini/ini/.github/ISSUE_TEMPLATE.md

@@ -0,0 +1,5 @@
+### Please give general description of the problem
+
+### Please provide code snippets to reproduce the problem described above
+
+### Do you have any suggestion to fix the problem?

vendor/github.com/go-ini/ini/.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,3 @@
+### What problem should be fixed?
+
+### Have you added test cases to catch the problem?

vendor/github.com/go-ini/ini/.gitignore

@@ -0,0 +1,6 @@
+testdata/conf_out.ini
+ini.sublime-project
+ini.sublime-workspace
+testdata/conf_reflect.ini
+.idea
+/.vscode

vendor/github.com/go-ini/ini/LICENSE

@@ -176,7 +176,7 @@ recommend that a file or class name and description of purpose be included on
 the same "printed page" as the copyright notice for easier identification within
 third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2014 Unknwon
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.

vendor/github.com/go-ini/ini/Makefile

@@ -1,4 +1,4 @@
-.PHONY: build test bench vet
+.PHONY: build test bench vet coverage
 
 build: vet bench
 
@@ -10,3 +10,6 @@ bench:
 
 vet:
 	go vet
+
+coverage:
+	go test -coverprofile=c.out && go tool cover -html=c.out && rm c.out

vendor/github.com/go-ini/ini/README.md

@@ -1,4 +1,4 @@
-INI [![Build Status](https://travis-ci.org/go-ini/ini.svg?branch=master)](https://travis-ci.org/go-ini/ini)
+INI [![Build Status](https://travis-ci.org/go-ini/ini.svg?branch=master)](https://travis-ci.org/go-ini/ini) [![Sourcegraph](https://sourcegraph.com/github.com/go-ini/ini/-/badge.svg)](https://sourcegraph.com/github.com/go-ini/ini?badge)
 ===
 
 ![](https://avatars0.githubusercontent.com/u/10216035?v=3&s=200)
@@ -9,7 +9,7 @@ Package ini provides INI file read and write functionality in Go.
 
 ## Feature
 
-- Load multiple data sources(`[]byte` or file) with overwrites.
+- Load multiple data sources(`[]byte`, file and `io.ReadCloser`) with overwrites.
 - Read with recursion values.
 - Read with parent-child sections.
 - Read with auto-increment key names.
@@ -44,10 +44,10 @@ Please add `-u` flag to update in the future.
 
 ### Loading from data sources
 
-A **Data Source** is either raw data in type `[]byte` or a file name with type `string` and you can load **as many data sources as you want**. Passing other types will simply return an error.
+A **Data Source** is either raw data in type `[]byte`, a file name with type `string` or `io.ReadCloser`. You can load **as many data sources as you want**. Passing other types will simply return an error.
 
 ```go
-cfg, err := ini.Load([]byte("raw data"), "filename")
+cfg, err := ini.Load([]byte("raw data"), "filename", ioutil.NopCloser(bytes.NewReader([]byte("some other data"))))
 ```
 
 Or start with an empty object:
@@ -83,8 +83,8 @@ sec1, err := cfg.GetSection("Section")
 sec2, err := cfg.GetSection("SecTIOn")
 
 // key1 and key2 are the exactly same key object
-key1, err := cfg.GetKey("Key")
-key2, err := cfg.GetKey("KeY")
+key1, err := sec1.GetKey("Key")
+key2, err := sec2.GetKey("KeY")
 ```
 
 #### MySQL-like boolean key 
@@ -101,11 +101,33 @@ skip-name-resolve
 By default, this is considered as missing value. But if you know you're going to deal with those cases, you can assign advanced load options:
 
 ```go
-cfg, err := LoadSources(LoadOptions{AllowBooleanKeys: true}, "my.cnf"))
+cfg, err := ini.LoadSources(ini.LoadOptions{AllowBooleanKeys: true}, "my.cnf"))
 ```
 
 The value of those keys are always `true`, and when you save to a file, it will keep in the same foramt as you read.
 
+To generate such keys in your program, you could use `NewBooleanKey`:
+
+```go
+key, err := sec.NewBooleanKey("skip-host-cache")
+```
+
+#### Comment
+
+Take care that following format will be treated as comment:
+
+1. Line begins with `#` or `;`
+2. Words after `#` or `;`
+3. Words after section name (i.e words after `[some section name]`)
+
+If you want to save a value with `#` or `;`, please quote them with ``` ` ``` or ``` """ ```.
+
+Alternatively, you can use following `LoadOptions` to completely ignore inline comments:
+
+```go
+cfg, err := ini.LoadSources(ini.LoadOptions{IgnoreInlineComment: true}, "app.ini"))
+```
+
 ### Working with sections
 
 To get a section, you would need to:
@@ -123,7 +145,7 @@ section, err := cfg.GetSection("")
 When you're pretty sure the section exists, following code could make your life easier:
 
 ```go
-section := cfg.Section("")
+section := cfg.Section("section name")
 ```
 
 What happens when the section somehow does not exist? Don't panic, it automatically creates and returns a new section to you.
@@ -307,6 +329,20 @@ foo = "some value" // foo: some value
 bar = 'some value' // bar: some value
 ```
 
+Sometimes you downloaded file from [Crowdin](https://crowdin.com/) has values like the following (value is surrounded by double quotes and quotes in the value are escaped):
+
+```ini
+create_repo="created repository <a href=\"%s\">%s</a>"
+```
+
+How do you transform this to regular format automatically?
+
+```go
+cfg, err := ini.LoadSources(ini.LoadOptions{UnescapeValueDoubleQuotes: true}, "en-US.ini"))
+cfg.Section("<name of your section>").Key("create_repo").String() 
+// You got: created repository <a href="%s">%s</a>
+```
+
 That's all? Hmm, no.
 
 #### Helper methods of working with values
@@ -400,6 +436,12 @@ cfg.WriteTo(writer)
 cfg.WriteToIndent(writer, "\t")
 ```
 
+By default, spaces are used to align "=" sign between key and values, to disable that:
+
+```go
+ini.PrettyFormat = false
+``` 
+
 ## Advanced Usage
 
 ### Recursive Values
@@ -447,6 +489,21 @@ cfg.Section("package.sub").Key("CLONE_URL").String()	// https://gopkg.in/ini.v1
 cfg.Section("package.sub").ParentKeys() // ["CLONE_URL"]
 ```
 
+### Unparseable Sections
+
+Sometimes, you have sections that do not contain key-value pairs but raw content, to handle such case, you can use `LoadOptions.UnparsableSections`:
+
+```go
+cfg, err := ini.LoadSources(ini.LoadOptions{UnparseableSections: []string{"COMMENTS"}}, `[COMMENTS]
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>`))
+
+body := cfg.Section("COMMENTS").Body()
+
+/* --- start ---
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>
+------  end  --- */
+```
+
 ### Auto-increment Key Names
 
 If key name is `-` in data source, then it would be seen as special syntax for auto-increment key name start from 1, and every section is independent on counter.
@@ -530,7 +587,7 @@ Why not?
 
 ```go
 type Embeded struct {
-	Dates  []time.Time `delim:"|"`
+	Dates  []time.Time `delim:"|" comment:"Time data"`
 	Places []string    `ini:"places,omitempty"`
 	None   []int       `ini:",omitempty"`
 }
@@ -538,10 +595,10 @@ type Embeded struct {
 type Author struct {
 	Name      string `ini:"NAME"`
 	Male      bool
-	Age       int
+	Age       int `comment:"Author's age"`
 	GPA       float64
 	NeverMind string `ini:"-"`
-	*Embeded
+	*Embeded `comment:"Embeded section"`
 }
 
 func main() {
@@ -562,10 +619,13 @@ So, what do I get?
 ```ini
 NAME = Unknwon
 Male = true
+; Author's age
 Age = 21
 GPA = 2.8
 
+; Embeded section
 [Embeded]
+; Time data
 Dates = 2015-08-07T22:14:22+08:00|2015-08-07T22:14:22+08:00
 places = HangZhou,Boston
 ```

vendor/github.com/go-ini/ini/README_ZH.md

@@ -2,7 +2,7 @@
 
 ## 功能特性
 
-- 支持覆盖加载多个数据源（`[]byte` 或文件）
+- 支持覆盖加载多个数据源（`[]byte`、文件和 `io.ReadCloser`）
 - 支持递归读取键值
 - 支持读取父子分区
 - 支持读取自增键名
@@ -37,10 +37,10 @@
 
 ### 从数据源加载
 
-一个 **数据源** 可以是 `[]byte` 类型的原始数据，或 `string` 类型的文件路径。您可以加载 **任意多个** 数据源。如果您传递其它类型的数据源，则会直接返回错误。
+一个 **数据源** 可以是 `[]byte` 类型的原始数据，`string` 类型的文件路径或 `io.ReadCloser`。您可以加载 **任意多个** 数据源。如果您传递其它类型的数据源，则会直接返回错误。
 
 ```go
-cfg, err := ini.Load([]byte("raw data"), "filename")
+cfg, err := ini.Load([]byte("raw data"), "filename", ioutil.NopCloser(bytes.NewReader([]byte("some other data"))))
 ```
 
 或者从一个空白的文件开始：
@@ -76,8 +76,8 @@ sec1, err := cfg.GetSection("Section")
 sec2, err := cfg.GetSection("SecTIOn")
 
 // key1 和 key2 指向同一个键对象
-key1, err := cfg.GetKey("Key")
-key2, err := cfg.GetKey("KeY")
+key1, err := sec1.GetKey("Key")
+key2, err := sec2.GetKey("KeY")
 ```
 
 #### 类似 MySQL 配置中的布尔值键
@@ -94,11 +94,33 @@ skip-name-resolve
 默认情况下这被认为是缺失值而无法完成解析，但可以通过高级的加载选项对它们进行处理：
 
 ```go
-cfg, err := LoadSources(LoadOptions{AllowBooleanKeys: true}, "my.cnf"))
+cfg, err := ini.LoadSources(ini.LoadOptions{AllowBooleanKeys: true}, "my.cnf"))
 ```
 
 这些键的值永远为 `true`，且在保存到文件时也只会输出键名。
 
+如果您想要通过程序来生成此类键，则可以使用 `NewBooleanKey`：
+
+```go
+key, err := sec.NewBooleanKey("skip-host-cache")
+```
+
+#### 关于注释
+
+下述几种情况的内容将被视为注释：
+
+1. 所有以 `#` 或 `;` 开头的行
+2. 所有在 `#` 或 `;` 之后的内容
+3. 分区标签后的文字 (即 `[分区名]` 之后的内容)
+
+如果你希望使用包含 `#` 或 `;` 的值，请使用 ``` ` ``` 或 ``` """ ``` 进行包覆。
+
+除此之外，您还可以通过 `LoadOptions` 完全忽略行内注释：
+
+```go
+cfg, err := ini.LoadSources(ini.LoadOptions{IgnoreInlineComment: true}, "app.ini"))
+```
+
 ### 操作分区（Section）
 
 获取指定分区：
@@ -116,7 +138,7 @@ section, err := cfg.GetSection("")
 当您非常确定某个分区是存在的，可以使用以下简便方法：
 
 ```go
-section := cfg.Section("")
+section := cfg.Section("section name")
 ```
 
 如果不小心判断错了，要获取的分区其实是不存在的，那会发生什么呢？没事的，它会自动创建并返回一个对应的分区对象给您。
@@ -300,6 +322,20 @@ foo = "some value" // foo: some value
 bar = 'some value' // bar: some value
 ```
 
+有时您会获得像从 [Crowdin](https://crowdin.com/) 网站下载的文件那样具有特殊格式的值（值使用双引号括起来，内部的双引号被转义）：
+
+```ini
+create_repo="创建了仓库 <a href=\"%s\">%s</a>"
+```
+
+那么，怎么自动地将这类值进行处理呢？
+
+```go
+cfg, err := ini.LoadSources(ini.LoadOptions{UnescapeValueDoubleQuotes: true}, "en-US.ini"))
+cfg.Section("<name of your section>").Key("create_repo").String() 
+// You got: 创建了仓库 <a href="%s">%s</a>
+```
+
 这就是全部了？哈哈，当然不是。
 
 #### 操作键值的辅助方法
@@ -393,9 +429,15 @@ cfg.WriteTo(writer)
 cfg.WriteToIndent(writer, "\t")
 ```
 
-### 高级用法
+默认情况下，空格将被用于对齐键值之间的等号以美化输出结果，以下代码可以禁用该功能：
 
-#### 递归读取键值
+```go
+ini.PrettyFormat = false
+``` 
+
+## 高级用法
+
+### 递归读取键值
 
 在获取所有键值的过程中，特殊语法 `%(<name>)s` 会被应用，其中 `<name>` 可以是相同分区或者默认分区下的键名。字符串 `%(<name>)s` 会被相应的键值所替代，如果指定的键不存在，则会用空字符串替代。您可以最多使用 99 层的递归嵌套。
 
@@ -415,7 +457,7 @@ cfg.Section("author").Key("GITHUB").String()		// https://github.com/Unknwon
 cfg.Section("package").Key("FULL_NAME").String()	// github.com/go-ini/ini
 ```
 
-#### 读取父子分区
+### 读取父子分区
 
 您可以在分区名称中使用 `.` 来表示两个或多个分区之间的父子关系。如果某个键在子分区中不存在，则会去它的父分区中再次寻找，直到没有父分区为止。
 
@@ -440,7 +482,22 @@ cfg.Section("package.sub").Key("CLONE_URL").String()	// https://gopkg.in/ini.v1
 cfg.Section("package.sub").ParentKeys() // ["CLONE_URL"]
 ```
 
-#### 读取自增键名
+### 无法解析的分区
+
+如果遇到一些比较特殊的分区，它们不包含常见的键值对，而是没有固定格式的纯文本，则可以使用 `LoadOptions.UnparsableSections` 进行处理：
+
+```go
+cfg, err := LoadSources(ini.LoadOptions{UnparseableSections: []string{"COMMENTS"}}, `[COMMENTS]
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>`))
+
+body := cfg.Section("COMMENTS").Body()
+
+/* --- start ---
+<1><L.Slide#2> This slide has the fuel listed in the wrong units <e.1>
+------  end  --- */
+```
+
+### 读取自增键名
 
 如果数据源中的键名为 `-`，则认为该键使用了自增键名的特殊语法。计数器从 1 开始，并且分区之间是相互独立的。
 
@@ -521,7 +578,7 @@ p := &Person{
 
 ```go
 type Embeded struct {
-	Dates  []time.Time `delim:"|"`
+	Dates  []time.Time `delim:"|" comment:"Time data"`
 	Places []string    `ini:"places,omitempty"`
 	None   []int       `ini:",omitempty"`
 }
@@ -529,10 +586,10 @@ type Embeded struct {
 type Author struct {
 	Name      string `ini:"NAME"`
 	Male      bool
-	Age       int
+	Age       int `comment:"Author's age"`
 	GPA       float64
 	NeverMind string `ini:"-"`
-	*Embeded
+	*Embeded `comment:"Embeded section"`
 }
 
 func main() {
@@ -553,10 +610,13 @@ func main() {
 ```ini
 NAME = Unknwon
 Male = true
+; Author's age
 Age = 21
 GPA = 2.8
 
+; Embeded section
 [Embeded]
+; Time data
 Dates = 2015-08-07T22:14:22+08:00|2015-08-07T22:14:22+08:00
 places = HangZhou,Boston
 ```

vendor/github.com/go-ini/ini/file.go

@@ -0,0 +1,398 @@
+// Copyright 2017 Unknwon
+//
+// Licensed under the Apache License, Version 2.0 (the "License"): you may
+// not use this file except in compliance with the License. You may obtain
+// a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations
+// under the License.
+
+package ini
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"io/ioutil"
+	"os"
+	"strings"
+	"sync"
+)
+
+// File represents a combination of a or more INI file(s) in memory.
+type File struct {
+	options     LoadOptions
+	dataSources []dataSource
+
+	// Should make things safe, but sometimes doesn't matter.
+	BlockMode bool
+	lock      sync.RWMutex
+
+	// To keep data in order.
+	sectionList []string
+	// Actual data is stored here.
+	sections map[string]*Section
+
+	NameMapper
+	ValueMapper
+}
+
+// newFile initializes File object with given data sources.
+func newFile(dataSources []dataSource, opts LoadOptions) *File {
+	return &File{
+		BlockMode:   true,
+		dataSources: dataSources,
+		sections:    make(map[string]*Section),
+		sectionList: make([]string, 0, 10),
+		options:     opts,
+	}
+}
+
+// Empty returns an empty file object.
+func Empty() *File {
+	// Ignore error here, we sure our data is good.
+	f, _ := Load([]byte(""))
+	return f
+}
+
+// NewSection creates a new section.
+func (f *File) NewSection(name string) (*Section, error) {
+	if len(name) == 0 {
+		return nil, errors.New("error creating new section: empty section name")
+	} else if f.options.Insensitive && name != DEFAULT_SECTION {
+		name = strings.ToLower(name)
+	}
+
+	if f.BlockMode {
+		f.lock.Lock()
+		defer f.lock.Unlock()
+	}
+
+	if inSlice(name, f.sectionList) {
+		return f.sections[name], nil
+	}
+
+	f.sectionList = append(f.sectionList, name)
+	f.sections[name] = newSection(f, name)
+	return f.sections[name], nil
+}
+
+// NewRawSection creates a new section with an unparseable body.
+func (f *File) NewRawSection(name, body string) (*Section, error) {
+	section, err := f.NewSection(name)
+	if err != nil {
+		return nil, err
+	}
+
+	section.isRawSection = true
+	section.rawBody = body
+	return section, nil
+}
+
+// NewSections creates a list of sections.
+func (f *File) NewSections(names ...string) (err error) {
+	for _, name := range names {
+		if _, err = f.NewSection(name); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+// GetSection returns section by given name.
+func (f *File) GetSection(name string) (*Section, error) {
+	if len(name) == 0 {
+		name = DEFAULT_SECTION
+	}
+	if f.options.Insensitive {
+		name = strings.ToLower(name)
+	}
+
+	if f.BlockMode {
+		f.lock.RLock()
+		defer f.lock.RUnlock()
+	}
+
+	sec := f.sections[name]
+	if sec == nil {
+		return nil, fmt.Errorf("section '%s' does not exist", name)
+	}
+	return sec, nil
+}
+
+// Section assumes named section exists and returns a zero-value when not.
+func (f *File) Section(name string) *Section {
+	sec, err := f.GetSection(name)
+	if err != nil {
+		// Note: It's OK here because the only possible error is empty section name,
+		// but if it's empty, this piece of code won't be executed.
+		sec, _ = f.NewSection(name)
+		return sec
+	}
+	return sec
+}
+
+// Section returns list of Section.
+func (f *File) Sections() []*Section {
+	sections := make([]*Section, len(f.sectionList))
+	for i := range f.sectionList {
+		sections[i] = f.Section(f.sectionList[i])
+	}
+	return sections
+}
+
+// ChildSections returns a list of child sections of given section name.
+func (f *File) ChildSections(name string) []*Section {
+	return f.Section(name).ChildSections()
+}
+
+// SectionStrings returns list of section names.
+func (f *File) SectionStrings() []string {
+	list := make([]string, len(f.sectionList))
+	copy(list, f.sectionList)
+	return list
+}
+
+// DeleteSection deletes a section.
+func (f *File) DeleteSection(name string) {
+	if f.BlockMode {
+		f.lock.Lock()
+		defer f.lock.Unlock()
+	}
+
+	if len(name) == 0 {
+		name = DEFAULT_SECTION
+	}
+
+	for i, s := range f.sectionList {
+		if s == name {
+			f.sectionList = append(f.sectionList[:i], f.sectionList[i+1:]...)
+			delete(f.sections, name)
+			return
+		}
+	}
+}
+
+func (f *File) reload(s dataSource) error {
+	r, err := s.ReadCloser()
+	if err != nil {
+		return err
+	}
+	defer r.Close()
+
+	return f.parse(r)
+}
+
+// Reload reloads and parses all data sources.
+func (f *File) Reload() (err error) {
+	for _, s := range f.dataSources {
+		if err = f.reload(s); err != nil {
+			// In loose mode, we create an empty default section for nonexistent files.
+			if os.IsNotExist(err) && f.options.Loose {
+				f.parse(bytes.NewBuffer(nil))
+				continue
+			}
+			return err
+		}
+	}
+	return nil
+}
+
+// Append appends one or more data sources and reloads automatically.
+func (f *File) Append(source interface{}, others ...interface{}) error {
+	ds, err := parseDataSource(source)
+	if err != nil {
+		return err
+	}
+	f.dataSources = append(f.dataSources, ds)
+	for _, s := range others {
+		ds, err = parseDataSource(s)
+		if err != nil {
+			return err
+		}
+		f.dataSources = append(f.dataSources, ds)
+	}
+	return f.Reload()
+}
+
+func (f *File) writeToBuffer(indent string) (*bytes.Buffer, error) {
+	equalSign := "="
+	if PrettyFormat {
+		equalSign = " = "
+	}
+
+	// Use buffer to make sure target is safe until finish encoding.
+	buf := bytes.NewBuffer(nil)
+	for i, sname := range f.sectionList {
+		sec := f.Section(sname)
+		if len(sec.Comment) > 0 {
+			if sec.Comment[0] != '#' && sec.Comment[0] != ';' {
+				sec.Comment = "; " + sec.Comment
+			} else {
+				sec.Comment = sec.Comment[:1] + " " + strings.TrimSpace(sec.Comment[1:])
+			}
+			if _, err := buf.WriteString(sec.Comment + LineBreak); err != nil {
+				return nil, err
+			}
+		}
+
+		if i > 0 || DefaultHeader {
+			if _, err := buf.WriteString("[" + sname + "]" + LineBreak); err != nil {
+				return nil, err
+			}
+		} else {
+			// Write nothing if default section is empty
+			if len(sec.keyList) == 0 {
+				continue
+			}
+		}
+
+		if sec.isRawSection {
+			if _, err := buf.WriteString(sec.rawBody); err != nil {
+				return nil, err
+			}
+
+			if PrettySection {
+				// Put a line between sections
+				if _, err := buf.WriteString(LineBreak); err != nil {
+					return nil, err
+				}
+			}
+			continue
+		}
+
+		// Count and generate alignment length and buffer spaces using the
+		// longest key. Keys may be modifed if they contain certain characters so
+		// we need to take that into account in our calculation.
+		alignLength := 0
+		if PrettyFormat {
+			for _, kname := range sec.keyList {
+				keyLength := len(kname)
+				// First case will surround key by ` and second by """
+				if strings.ContainsAny(kname, "\"=:") {
+					keyLength += 2
+				} else if strings.Contains(kname, "`") {
+					keyLength += 6
+				}
+
+				if keyLength > alignLength {
+					alignLength = keyLength
+				}
+			}
+		}
+		alignSpaces := bytes.Repeat([]byte(" "), alignLength)
+
+	KEY_LIST:
+		for _, kname := range sec.keyList {
+			key := sec.Key(kname)
+			if len(key.Comment) > 0 {
+				if len(indent) > 0 && sname != DEFAULT_SECTION {
+					buf.WriteString(indent)
+				}
+				if key.Comment[0] != '#' && key.Comment[0] != ';' {
+					key.Comment = "; " + key.Comment
+				} else {
+					key.Comment = key.Comment[:1] + " " + strings.TrimSpace(key.Comment[1:])
+				}
+				if _, err := buf.WriteString(key.Comment + LineBreak); err != nil {
+					return nil, err
+				}
+			}
+
+			if len(indent) > 0 && sname != DEFAULT_SECTION {
+				buf.WriteString(indent)
+			}
+
+			switch {
+			case key.isAutoIncrement:
+				kname = "-"
+			case strings.ContainsAny(kname, "\"=:"):
+				kname = "`" + kname + "`"
+			case strings.Contains(kname, "`"):
+				kname = `"""` + kname + `"""`
+			}
+
+			for _, val := range key.ValueWithShadows() {
+				if _, err := buf.WriteString(kname); err != nil {
+					return nil, err
+				}
+
+				if key.isBooleanType {
+					if kname != sec.keyList[len(sec.keyList)-1] {
+						buf.WriteString(LineBreak)
+					}
+					continue KEY_LIST
+				}
+
+				// Write out alignment spaces before "=" sign
+				if PrettyFormat {
+					buf.Write(alignSpaces[:alignLength-len(kname)])
+				}
+
+				// In case key value contains "\n", "`", "\"", "#" or ";"
+				if strings.ContainsAny(val, "\n`") {
+					val = `"""` + val + `"""`
+				} else if !f.options.IgnoreInlineComment && strings.ContainsAny(val, "#;") {
+					val = "`" + val + "`"
+				}
+				if _, err := buf.WriteString(equalSign + val + LineBreak); err != nil {
+					return nil, err
+				}
+			}
+
+			for _, val := range key.nestedValues {
+				if _, err := buf.WriteString(indent + "  " + val + LineBreak); err != nil {
+					return nil, err
+				}
+			}
+		}
+
+		if PrettySection {
+			// Put a line between sections
+			if _, err := buf.WriteString(LineBreak); err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	return buf, nil
+}
+
+// WriteToIndent writes content into io.Writer with given indention.
+// If PrettyFormat has been set to be true,
+// it will align "=" sign with spaces under each section.
+func (f *File) WriteToIndent(w io.Writer, indent string) (int64, error) {
+	buf, err := f.writeToBuffer(indent)
+	if err != nil {
+		return 0, err
+	}
+	return buf.WriteTo(w)
+}
+
+// WriteTo writes file content into io.Writer.
+func (f *File) WriteTo(w io.Writer) (int64, error) {
+	return f.WriteToIndent(w, "")
+}
+
+// SaveToIndent writes content to file system with given value indention.
+func (f *File) SaveToIndent(filename, indent string) error {
+	// Note: Because we are truncating with os.Create,
+	// 	so it's safer to save to a temporary file location and rename afte done.
+	buf, err := f.writeToBuffer(indent)
+	if err != nil {
+		return err
+	}
+
+	return ioutil.WriteFile(filename, buf.Bytes(), 0666)
+}
+
+// SaveTo writes content to file system.
+func (f *File) SaveTo(filename string) error {
+	return f.SaveToIndent(filename, "")
+}

vendor/github.com/go-ini/ini/ini.go

@@ -17,16 +17,12 @@ package ini
 
 import (
 	"bytes"
-	"errors"
 	"fmt"
 	"io"
+	"io/ioutil"
 	"os"
 	"regexp"
 	"runtime"
-	"strconv"
-	"strings"
-	"sync"
-	"time"
 )
 
 const (
@@ -36,7 +32,7 @@ const (
 
 	// Maximum allowed depth when recursively substituing variable names.
 	_DEPTH_VALUES = 99
-	_VERSION      = "1.21.1"
+	_VERSION      = "1.32.0"
 )
 
 // Version returns current package version literal.
@@ -59,6 +55,9 @@ var (
 
 	// Explicitly write DEFAULT section header
 	DefaultHeader = false
+
+	// Indicate whether to put a line between sections
+	PrettySection = true
 )
 
 func init() {
@@ -90,57 +89,22 @@ func (s sourceFile) ReadCloser() (_ io.ReadCloser, err error) {
 	return os.Open(s.name)
 }
 
-type bytesReadCloser struct {
-	reader io.Reader
-}
-
-func (rc *bytesReadCloser) Read(p []byte) (n int, err error) {
-	return rc.reader.Read(p)
-}
-
-func (rc *bytesReadCloser) Close() error {
-	return nil
-}
-
 // sourceData represents an object that contains content in memory.
 type sourceData struct {
 	data []byte
 }
 
 func (s *sourceData) ReadCloser() (io.ReadCloser, error) {
-	return &bytesReadCloser{bytes.NewReader(s.data)}, nil
+	return ioutil.NopCloser(bytes.NewReader(s.data)), nil
 }
 
-// File represents a combination of a or more INI file(s) in memory.
-type File struct {
-	// Should make things safe, but sometimes doesn't matter.
-	BlockMode bool
-	// Make sure data is safe in multiple goroutines.
-	lock sync.RWMutex
-
-	// Allow combination of multiple data sources.
-	dataSources []dataSource
-	// Actual data is stored here.
-	sections map[string]*Section
-
-	// To keep data in order.
-	sectionList []string
-
-	options LoadOptions
-
-	NameMapper
-	ValueMapper
+// sourceReadCloser represents an input stream with Close method.
+type sourceReadCloser struct {
+	reader io.ReadCloser
 }
 
-// newFile initializes File object with given data sources.
-func newFile(dataSources []dataSource, opts LoadOptions) *File {
-	return &File{
-		BlockMode:   true,
-		dataSources: dataSources,
-		sections:    make(map[string]*Section),
-		sectionList: make([]string, 0, 10),
-		options:     opts,
-	}
+func (s *sourceReadCloser) ReadCloser() (io.ReadCloser, error) {
+	return s.reader, nil
 }
 
 func parseDataSource(source interface{}) (dataSource, error) {
@@ -149,6 +113,8 @@ func parseDataSource(source interface{}) (dataSource, error) {
 		return sourceFile{s}, nil
 	case []byte:
 		return &sourceData{s}, nil
+	case io.ReadCloser:
+		return &sourceReadCloser{s}, nil
 	default:
 		return nil, fmt.Errorf("error parsing data source: unknown type '%s'", s)
 	}
@@ -161,9 +127,26 @@ type LoadOptions struct {
 	Insensitive bool
 	// IgnoreContinuation indicates whether to ignore continuation lines while parsing.
 	IgnoreContinuation bool
+	// IgnoreInlineComment indicates whether to ignore comments at the end of value and treat it as part of value.
+	IgnoreInlineComment bool
 	// AllowBooleanKeys indicates whether to allow boolean type keys or treat as value is missing.
 	// This type of keys are mostly used in my.cnf.
 	AllowBooleanKeys bool
+	// AllowShadows indicates whether to keep track of keys with same name under same section.
+	AllowShadows bool
+	// AllowNestedValues indicates whether to allow AWS-like nested values.
+	// Docs: http://docs.aws.amazon.com/cli/latest/topic/config-vars.html#nested-values
+	AllowNestedValues bool
+	// UnescapeValueDoubleQuotes indicates whether to unescape double quotes inside value to regular format
+	// when value is surrounded by double quotes, e.g. key="a \"value\"" => key=a "value"
+	UnescapeValueDoubleQuotes bool
+	// UnescapeValueCommentSymbols indicates to unescape comment symbols (\# and \;) inside value to regular format
+	// when value is NOT surrounded by any quotes.
+	// Note: UNSTABLE, behavior might change to only unescape inside double quotes but may noy necessary at all.
+	UnescapeValueCommentSymbols bool
+	// Some INI formats allow group blocks that store a block of raw content that doesn't otherwise
+	// conform to key/value pairs. Specify the names of those blocks here.
+	UnparseableSections []string
 }
 
 func LoadSources(opts LoadOptions, source interface{}, others ...interface{}) (_ *File, err error) {
@@ -204,298 +187,8 @@ func InsensitiveLoad(source interface{}, others ...interface{}) (*File, error) {
 	return LoadSources(LoadOptions{Insensitive: true}, source, others...)
 }
 
-// Empty returns an empty file object.
-func Empty() *File {
-	// Ignore error here, we sure our data is good.
-	f, _ := Load([]byte(""))
-	return f
-}
-
-// NewSection creates a new section.
-func (f *File) NewSection(name string) (*Section, error) {
-	if len(name) == 0 {
-		return nil, errors.New("error creating new section: empty section name")
-	} else if f.options.Insensitive && name != DEFAULT_SECTION {
-		name = strings.ToLower(name)
-	}
-
-	if f.BlockMode {
-		f.lock.Lock()
-		defer f.lock.Unlock()
-	}
-
-	if inSlice(name, f.sectionList) {
-		return f.sections[name], nil
-	}
-
-	f.sectionList = append(f.sectionList, name)
-	f.sections[name] = newSection(f, name)
-	return f.sections[name], nil
-}
-
-// NewSections creates a list of sections.
-func (f *File) NewSections(names ...string) (err error) {
-	for _, name := range names {
-		if _, err = f.NewSection(name); err != nil {
-			return err
-		}
-	}
-	return nil
-}
-
-// GetSection returns section by given name.
-func (f *File) GetSection(name string) (*Section, error) {
-	if len(name) == 0 {
-		name = DEFAULT_SECTION
-	} else if f.options.Insensitive {
-		name = strings.ToLower(name)
-	}
-
-	if f.BlockMode {
-		f.lock.RLock()
-		defer f.lock.RUnlock()
-	}
-
-	sec := f.sections[name]
-	if sec == nil {
-		return nil, fmt.Errorf("section '%s' does not exist", name)
-	}
-	return sec, nil
-}
-
-// Section assumes named section exists and returns a zero-value when not.
-func (f *File) Section(name string) *Section {
-	sec, err := f.GetSection(name)
-	if err != nil {
-		// Note: It's OK here because the only possible error is empty section name,
-		// but if it's empty, this piece of code won't be executed.
-		sec, _ = f.NewSection(name)
-		return sec
-	}
-	return sec
-}
-
-// Section returns list of Section.
-func (f *File) Sections() []*Section {
-	sections := make([]*Section, len(f.sectionList))
-	for i := range f.sectionList {
-		sections[i] = f.Section(f.sectionList[i])
-	}
-	return sections
-}
-
-// SectionStrings returns list of section names.
-func (f *File) SectionStrings() []string {
-	list := make([]string, len(f.sectionList))
-	copy(list, f.sectionList)
-	return list
-}
-
-// DeleteSection deletes a section.
-func (f *File) DeleteSection(name string) {
-	if f.BlockMode {
-		f.lock.Lock()
-		defer f.lock.Unlock()
-	}
-
-	if len(name) == 0 {
-		name = DEFAULT_SECTION
-	}
-
-	for i, s := range f.sectionList {
-		if s == name {
-			f.sectionList = append(f.sectionList[:i], f.sectionList[i+1:]...)
-			delete(f.sections, name)
-			return
-		}
-	}
-}
-
-func (f *File) reload(s dataSource) error {
-	r, err := s.ReadCloser()
-	if err != nil {
-		return err
-	}
-	defer r.Close()
-
-	return f.parse(r)
-}
-
-// Reload reloads and parses all data sources.
-func (f *File) Reload() (err error) {
-	for _, s := range f.dataSources {
-		if err = f.reload(s); err != nil {
-			// In loose mode, we create an empty default section for nonexistent files.
-			if os.IsNotExist(err) && f.options.Loose {
-				f.parse(bytes.NewBuffer(nil))
-				continue
-			}
-			return err
-		}
-	}
-	return nil
-}
-
-// Append appends one or more data sources and reloads automatically.
-func (f *File) Append(source interface{}, others ...interface{}) error {
-	ds, err := parseDataSource(source)
-	if err != nil {
-		return err
-	}
-	f.dataSources = append(f.dataSources, ds)
-	for _, s := range others {
-		ds, err = parseDataSource(s)
-		if err != nil {
-			return err
-		}
-		f.dataSources = append(f.dataSources, ds)
-	}
-	return f.Reload()
-}
-
-// WriteToIndent writes content into io.Writer with given indention.
-// If PrettyFormat has been set to be true,
-// it will align "=" sign with spaces under each section.
-func (f *File) WriteToIndent(w io.Writer, indent string) (n int64, err error) {
-	equalSign := "="
-	if PrettyFormat {
-		equalSign = " = "
-	}
-
-	// Use buffer to make sure target is safe until finish encoding.
-	buf := bytes.NewBuffer(nil)
-	for i, sname := range f.sectionList {
-		sec := f.Section(sname)
-		if len(sec.Comment) > 0 {
-			if sec.Comment[0] != '#' && sec.Comment[0] != ';' {
-				sec.Comment = "; " + sec.Comment
-			}
-			if _, err = buf.WriteString(sec.Comment + LineBreak); err != nil {
-				return 0, err
-			}
-		}
-
-		if i > 0 || DefaultHeader {
-			if _, err = buf.WriteString("[" + sname + "]" + LineBreak); err != nil {
-				return 0, err
-			}
-		} else {
-			// Write nothing if default section is empty
-			if len(sec.keyList) == 0 {
-				continue
-			}
-		}
-
-		// Count and generate alignment length and buffer spaces using the
-		// longest key. Keys may be modifed if they contain certain characters so
-		// we need to take that into account in our calculation.
-		alignLength := 0
-		if PrettyFormat {
-			for _, kname := range sec.keyList {
-				keyLength := len(kname)
-				// First case will surround key by ` and second by """
-				if strings.ContainsAny(kname, "\"=:") {
-					keyLength += 2
-				} else if strings.Contains(kname, "`") {
-					keyLength += 6
-				}
-
-				if keyLength > alignLength {
-					alignLength = keyLength
-				}
-			}
-		}
-		alignSpaces := bytes.Repeat([]byte(" "), alignLength)
-
-		for _, kname := range sec.keyList {
-			key := sec.Key(kname)
-			if len(key.Comment) > 0 {
-				if len(indent) > 0 && sname != DEFAULT_SECTION {
-					buf.WriteString(indent)
-				}
-				if key.Comment[0] != '#' && key.Comment[0] != ';' {
-					key.Comment = "; " + key.Comment
-				}
-				if _, err = buf.WriteString(key.Comment + LineBreak); err != nil {
-					return 0, err
-				}
-			}
-
-			if len(indent) > 0 && sname != DEFAULT_SECTION {
-				buf.WriteString(indent)
-			}
-
-			switch {
-			case key.isAutoIncrement:
-				kname = "-"
-			case strings.ContainsAny(kname, "\"=:"):
-				kname = "`" + kname + "`"
-			case strings.Contains(kname, "`"):
-				kname = `"""` + kname + `"""`
-			}
-			if _, err = buf.WriteString(kname); err != nil {
-				return 0, err
-			}
-
-			if key.isBooleanType {
-				continue
-			}
-
-			// Write out alignment spaces before "=" sign
-			if PrettyFormat {
-				buf.Write(alignSpaces[:alignLength-len(kname)])
-			}
-
-			val := key.value
-			// In case key value contains "\n", "`", "\"", "#" or ";"
-			if strings.ContainsAny(val, "\n`") {
-				val = `"""` + val + `"""`
-			} else if strings.ContainsAny(val, "#;") {
-				val = "`" + val + "`"
-			}
-			if _, err = buf.WriteString(equalSign + val + LineBreak); err != nil {
-				return 0, err
-			}
-		}
-
-		// Put a line between sections
-		if _, err = buf.WriteString(LineBreak); err != nil {
-			return 0, err
-		}
-	}
-
-	return buf.WriteTo(w)
-}
-
-// WriteTo writes file content into io.Writer.
-func (f *File) WriteTo(w io.Writer) (int64, error) {
-	return f.WriteToIndent(w, "")
-}
-
-// SaveToIndent writes content to file system with given value indention.
-func (f *File) SaveToIndent(filename, indent string) error {
-	// Note: Because we are truncating with os.Create,
-	// 	so it's safer to save to a temporary file location and rename afte done.
-	tmpPath := filename + "." + strconv.Itoa(time.Now().Nanosecond()) + ".tmp"
-	defer os.Remove(tmpPath)
-
-	fw, err := os.Create(tmpPath)
-	if err != nil {
-		return err
-	}
-
-	if _, err = f.WriteToIndent(fw, indent); err != nil {
-		fw.Close()
-		return err
-	}
-	fw.Close()
-
-	// Remove old file and rename the new one.
-	os.Remove(filename)
-	return os.Rename(tmpPath, filename)
-}
-
-// SaveTo writes content to file system.
-func (f *File) SaveTo(filename string) error {
-	return f.SaveToIndent(filename, "")
+// InsensitiveLoad has exactly same functionality as Load function
+// except it allows have shadow keys.
+func ShadowLoad(source interface{}, others ...interface{}) (*File, error) {
+	return LoadSources(LoadOptions{AllowShadows: true}, source, others...)
 }

vendor/github.com/go-ini/ini/key.go

@@ -15,6 +15,8 @@
 package ini
 
 import (
+	"bytes"
+	"errors"
 	"fmt"
 	"strconv"
 	"strings"
@@ -24,12 +26,62 @@ import (
 // Key represents a key under a section.
 type Key struct {
 	s               *Section
+	Comment         string
 	name            string
 	value           string
 	isAutoIncrement bool
 	isBooleanType   bool
 
-	Comment string
+	isShadow bool
+	shadows  []*Key
+
+	nestedValues []string
+}
+
+// newKey simply return a key object with given values.
+func newKey(s *Section, name, val string) *Key {
+	return &Key{
+		s:     s,
+		name:  name,
+		value: val,
+	}
+}
+
+func (k *Key) addShadow(val string) error {
+	if k.isShadow {
+		return errors.New("cannot add shadow to another shadow key")
+	} else if k.isAutoIncrement || k.isBooleanType {
+		return errors.New("cannot add shadow to auto-increment or boolean key")
+	}
+
+	shadow := newKey(k.s, k.name, val)
+	shadow.isShadow = true
+	k.shadows = append(k.shadows, shadow)
+	return nil
+}
+
+// AddShadow adds a new shadow key to itself.
+func (k *Key) AddShadow(val string) error {
+	if !k.s.f.options.AllowShadows {
+		return errors.New("shadow key is not allowed")
+	}
+	return k.addShadow(val)
+}
+
+func (k *Key) addNestedValue(val string) error {
+	if k.isAutoIncrement || k.isBooleanType {
+		return errors.New("cannot add nested value to auto-increment or boolean key")
+	}
+
+	k.nestedValues = append(k.nestedValues, val)
+	return nil
+}
+
+func (k *Key) AddNestedValue(val string) error {
+	if !k.s.f.options.AllowNestedValues {
+		return errors.New("nested value is not allowed")
+	}
+	return k.addNestedValue(val)
 }
 
 // ValueMapper represents a mapping function for values, e.g. os.ExpandEnv
@@ -45,16 +97,35 @@ func (k *Key) Value() string {
 	return k.value
 }
 
-// String returns string representation of value.
-func (k *Key) String() string {
-	val := k.value
+// ValueWithShadows returns raw values of key and its shadows if any.
+func (k *Key) ValueWithShadows() []string {
+	if len(k.shadows) == 0 {
+		return []string{k.value}
+	}
+	vals := make([]string, len(k.shadows)+1)
+	vals[0] = k.value
+	for i := range k.shadows {
+		vals[i+1] = k.shadows[i].value
+	}
+	return vals
+}
+
+// NestedValues returns nested values stored in the key.
+// It is possible returned value is nil if no nested values stored in the key.
+func (k *Key) NestedValues() []string {
+	return k.nestedValues
+}
+
+// transformValue takes a raw value and transforms to its final string.
+func (k *Key) transformValue(val string) string {
 	if k.s.f.ValueMapper != nil {
 		val = k.s.f.ValueMapper(val)
 	}
-	if strings.Index(val, "%") == -1 {
+
+	// Fail-fast if no indicate char found for recursive value
+	if !strings.Contains(val, "%") {
 		return val
 	}
-
 	for i := 0; i < _DEPTH_VALUES; i++ {
 		vr := varPattern.FindString(val)
 		if len(vr) == 0 {
@@ -67,7 +138,7 @@ func (k *Key) String() string {
 
 		// Search in the same section.
 		nk, err := k.s.GetKey(noption)
-		if err != nil {
+		if err != nil || k == nk {
 			// Search again in default section.
 			nk, _ = k.s.f.Section("").GetKey(noption)
 		}
@@ -78,6 +149,11 @@ func (k *Key) String() string {
 	return val
 }
 
+// String returns string representation of value.
+func (k *Key) String() string {
+	return k.transformValue(k.value)
+}
+
 // Validate accepts a validate function which can
 // return modifed result as key value.
 func (k *Key) Validate(fn func(string) string) string {
@@ -392,47 +468,95 @@ func (k *Key) Strings(delim string) []string {
 		return []string{}
 	}
 
-	vals := strings.Split(str, delim)
-	for i := range vals {
-		vals[i] = strings.TrimSpace(vals[i])
+	runes := []rune(str)
+	vals := make([]string, 0, 2)
+	var buf bytes.Buffer
+	escape := false
+	idx := 0
+	for {
+		if escape {
+			escape = false
+			if runes[idx] != '\\' && !strings.HasPrefix(string(runes[idx:]), delim) {
+				buf.WriteRune('\\')
+			}
+			buf.WriteRune(runes[idx])
+		} else {
+			if runes[idx] == '\\' {
+				escape = true
+			} else if strings.HasPrefix(string(runes[idx:]), delim) {
+				idx += len(delim) - 1
+				vals = append(vals, strings.TrimSpace(buf.String()))
+				buf.Reset()
+			} else {
+				buf.WriteRune(runes[idx])
+			}
+		}
+		idx += 1
+		if idx == len(runes) {
+			break
+		}
 	}
+
+	if buf.Len() > 0 {
+		vals = append(vals, strings.TrimSpace(buf.String()))
+	}
+
 	return vals
 }
 
+// StringsWithShadows returns list of string divided by given delimiter.
+// Shadows will also be appended if any.
+func (k *Key) StringsWithShadows(delim string) []string {
+	vals := k.ValueWithShadows()
+	results := make([]string, 0, len(vals)*2)
+	for i := range vals {
+		if len(vals) == 0 {
+			continue
+		}
+
+		results = append(results, strings.Split(vals[i], delim)...)
+	}
+
+	for i := range results {
+		results[i] = k.transformValue(strings.TrimSpace(results[i]))
+	}
+	return results
+}
+
 // Float64s returns list of float64 divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Float64s(delim string) []float64 {
-	vals, _ := k.getFloat64s(delim, true, false)
+	vals, _ := k.parseFloat64s(k.Strings(delim), true, false)
 	return vals
 }
 
 // Ints returns list of int divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Ints(delim string) []int {
-	vals, _ := k.getInts(delim, true, false)
+	vals, _ := k.parseInts(k.Strings(delim), true, false)
 	return vals
 }
 
 // Int64s returns list of int64 divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Int64s(delim string) []int64 {
-	vals, _ := k.getInt64s(delim, true, false)
+	vals, _ := k.parseInt64s(k.Strings(delim), true, false)
 	return vals
 }
 
 // Uints returns list of uint divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Uints(delim string) []uint {
-	vals, _ := k.getUints(delim, true, false)
+	vals, _ := k.parseUints(k.Strings(delim), true, false)
 	return vals
 }
 
 // Uint64s returns list of uint64 divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Uint64s(delim string) []uint64 {
-	vals, _ := k.getUint64s(delim, true, false)
+	vals, _ := k.parseUint64s(k.Strings(delim), true, false)
 	return vals
 }
 
 // TimesFormat parses with given format and returns list of time.Time divided by given delimiter.
 // Any invalid input will be treated as zero value (0001-01-01 00:00:00 +0000 UTC).
 func (k *Key) TimesFormat(format, delim string) []time.Time {
-	vals, _ := k.getTimesFormat(format, delim, true, false)
+	vals, _ := k.parseTimesFormat(format, k.Strings(delim), true, false)
 	return vals
 }
 
@@ -445,41 +569,41 @@ func (k *Key) Times(delim string) []time.Time {
 // ValidFloat64s returns list of float64 divided by given delimiter. If some value is not float, then
 // it will not be included to result list.
 func (k *Key) ValidFloat64s(delim string) []float64 {
-	vals, _ := k.getFloat64s(delim, false, false)
+	vals, _ := k.parseFloat64s(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidInts returns list of int divided by given delimiter. If some value is not integer, then it will
 // not be included to result list.
 func (k *Key) ValidInts(delim string) []int {
-	vals, _ := k.getInts(delim, false, false)
+	vals, _ := k.parseInts(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidInt64s returns list of int64 divided by given delimiter. If some value is not 64-bit integer,
 // then it will not be included to result list.
 func (k *Key) ValidInt64s(delim string) []int64 {
-	vals, _ := k.getInt64s(delim, false, false)
+	vals, _ := k.parseInt64s(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidUints returns list of uint divided by given delimiter. If some value is not unsigned integer,
 // then it will not be included to result list.
 func (k *Key) ValidUints(delim string) []uint {
-	vals, _ := k.getUints(delim, false, false)
+	vals, _ := k.parseUints(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidUint64s returns list of uint64 divided by given delimiter. If some value is not 64-bit unsigned
 // integer, then it will not be included to result list.
 func (k *Key) ValidUint64s(delim string) []uint64 {
-	vals, _ := k.getUint64s(delim, false, false)
+	vals, _ := k.parseUint64s(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidTimesFormat parses with given format and returns list of time.Time divided by given delimiter.
 func (k *Key) ValidTimesFormat(format, delim string) []time.Time {
-	vals, _ := k.getTimesFormat(format, delim, false, false)
+	vals, _ := k.parseTimesFormat(format, k.Strings(delim), false, false)
 	return vals
 }
 
@@ -490,33 +614,33 @@ func (k *Key) ValidTimes(delim string) []time.Time {
 
 // StrictFloat64s returns list of float64 divided by given delimiter or error on first invalid input.
 func (k *Key) StrictFloat64s(delim string) ([]float64, error) {
-	return k.getFloat64s(delim, false, true)
+	return k.parseFloat64s(k.Strings(delim), false, true)
 }
 
 // StrictInts returns list of int divided by given delimiter or error on first invalid input.
 func (k *Key) StrictInts(delim string) ([]int, error) {
-	return k.getInts(delim, false, true)
+	return k.parseInts(k.Strings(delim), false, true)
 }
 
 // StrictInt64s returns list of int64 divided by given delimiter or error on first invalid input.
 func (k *Key) StrictInt64s(delim string) ([]int64, error) {
-	return k.getInt64s(delim, false, true)
+	return k.parseInt64s(k.Strings(delim), false, true)
 }
 
 // StrictUints returns list of uint divided by given delimiter or error on first invalid input.
 func (k *Key) StrictUints(delim string) ([]uint, error) {
-	return k.getUints(delim, false, true)
+	return k.parseUints(k.Strings(delim), false, true)
 }
 
 // StrictUint64s returns list of uint64 divided by given delimiter or error on first invalid input.
 func (k *Key) StrictUint64s(delim string) ([]uint64, error) {
-	return k.getUint64s(delim, false, true)
+	return k.parseUint64s(k.Strings(delim), false, true)
 }
 
 // StrictTimesFormat parses with given format and returns list of time.Time divided by given delimiter
 // or error on first invalid input.
 func (k *Key) StrictTimesFormat(format, delim string) ([]time.Time, error) {
-	return k.getTimesFormat(format, delim, false, true)
+	return k.parseTimesFormat(format, k.Strings(delim), false, true)
 }
 
 // StrictTimes parses with RFC3339 format and returns list of time.Time divided by given delimiter
@@ -525,9 +649,8 @@ func (k *Key) StrictTimes(delim string) ([]time.Time, error) {
 	return k.StrictTimesFormat(time.RFC3339, delim)
 }
 
-// getFloat64s returns list of float64 divided by given delimiter.
-func (k *Key) getFloat64s(delim string, addInvalid, returnOnInvalid bool) ([]float64, error) {
-	strs := k.Strings(delim)
+// parseFloat64s transforms strings to float64s.
+func (k *Key) parseFloat64s(strs []string, addInvalid, returnOnInvalid bool) ([]float64, error) {
 	vals := make([]float64, 0, len(strs))
 	for _, str := range strs {
 		val, err := strconv.ParseFloat(str, 64)
@@ -541,9 +664,8 @@ func (k *Key) getFloat64s(delim string, addInvalid, returnOnInvalid bool) ([]flo
 	return vals, nil
 }
 
-// getInts returns list of int divided by given delimiter.
-func (k *Key) getInts(delim string, addInvalid, returnOnInvalid bool) ([]int, error) {
-	strs := k.Strings(delim)
+// parseInts transforms strings to ints.
+func (k *Key) parseInts(strs []string, addInvalid, returnOnInvalid bool) ([]int, error) {
 	vals := make([]int, 0, len(strs))
 	for _, str := range strs {
 		val, err := strconv.Atoi(str)
@@ -557,9 +679,8 @@ func (k *Key) getInts(delim string, addInvalid, returnOnInvalid bool) ([]int, er
 	return vals, nil
 }
 
-// getInt64s returns list of int64 divided by given delimiter.
-func (k *Key) getInt64s(delim string, addInvalid, returnOnInvalid bool) ([]int64, error) {
-	strs := k.Strings(delim)
+// parseInt64s transforms strings to int64s.
+func (k *Key) parseInt64s(strs []string, addInvalid, returnOnInvalid bool) ([]int64, error) {
 	vals := make([]int64, 0, len(strs))
 	for _, str := range strs {
 		val, err := strconv.ParseInt(str, 10, 64)
@@ -573,9 +694,8 @@ func (k *Key) getInt64s(delim string, addInvalid, returnOnInvalid bool) ([]int64
 	return vals, nil
 }
 
-// getUints returns list of uint divided by given delimiter.
-func (k *Key) getUints(delim string, addInvalid, returnOnInvalid bool) ([]uint, error) {
-	strs := k.Strings(delim)
+// parseUints transforms strings to uints.
+func (k *Key) parseUints(strs []string, addInvalid, returnOnInvalid bool) ([]uint, error) {
 	vals := make([]uint, 0, len(strs))
 	for _, str := range strs {
 		val, err := strconv.ParseUint(str, 10, 0)
@@ -589,9 +709,8 @@ func (k *Key) getUints(delim string, addInvalid, returnOnInvalid bool) ([]uint,
 	return vals, nil
 }
 
-// getUint64s returns list of uint64 divided by given delimiter.
-func (k *Key) getUint64s(delim string, addInvalid, returnOnInvalid bool) ([]uint64, error) {
-	strs := k.Strings(delim)
+// parseUint64s transforms strings to uint64s.
+func (k *Key) parseUint64s(strs []string, addInvalid, returnOnInvalid bool) ([]uint64, error) {
 	vals := make([]uint64, 0, len(strs))
 	for _, str := range strs {
 		val, err := strconv.ParseUint(str, 10, 64)
@@ -605,9 +724,8 @@ func (k *Key) getUint64s(delim string, addInvalid, returnOnInvalid bool) ([]uint
 	return vals, nil
 }
 
-// getTimesFormat parses with given format and returns list of time.Time divided by given delimiter.
-func (k *Key) getTimesFormat(format, delim string, addInvalid, returnOnInvalid bool) ([]time.Time, error) {
-	strs := k.Strings(delim)
+// parseTimesFormat transforms strings to times in given format.
+func (k *Key) parseTimesFormat(format string, strs []string, addInvalid, returnOnInvalid bool) ([]time.Time, error) {
 	vals := make([]time.Time, 0, len(strs))
 	for _, str := range strs {
 		val, err := time.Parse(format, str)

vendor/github.com/go-ini/ini/parser.go

@@ -48,16 +48,31 @@ func newParser(r io.Reader) *parser {
 	}
 }
 
-// BOM handles header of BOM-UTF8 format.
+// BOM handles header of UTF-8, UTF-16 LE and UTF-16 BE's BOM format.
 // http://en.wikipedia.org/wiki/Byte_order_mark#Representations_of_byte_order_marks_by_encoding
 func (p *parser) BOM() error {
-	mask, err := p.buf.Peek(3)
+	mask, err := p.buf.Peek(2)
 	if err != nil && err != io.EOF {
 		return err
-	} else if len(mask) < 3 {
+	} else if len(mask) < 2 {
 		return nil
-	} else if mask[0] == 239 && mask[1] == 187 && mask[2] == 191 {
+	}
+
+	switch {
+	case mask[0] == 254 && mask[1] == 255:
+		fallthrough
+	case mask[0] == 255 && mask[1] == 254:
 		p.buf.Read(mask)
+	case mask[0] == 239 && mask[1] == 187:
+		mask, err := p.buf.Peek(3)
+		if err != nil && err != io.EOF {
+			return err
+		} else if len(mask) < 3 {
+			return nil
+		}
+		if mask[2] == 191 {
+			p.buf.Read(mask)
+		}
 	}
 	return nil
 }
@@ -174,11 +189,13 @@ func (p *parser) readContinuationLines(val string) (string, error) {
 // are quotes \" or \'.
 // It returns false if any other parts also contain same kind of quotes.
 func hasSurroundedQuote(in string, quote byte) bool {
-	return len(in) > 2 && in[0] == quote && in[len(in)-1] == quote &&
+	return len(in) >= 2 && in[0] == quote && in[len(in)-1] == quote &&
 		strings.IndexByte(in[1:], quote) == len(in)-2
 }
 
-func (p *parser) readValue(in []byte, ignoreContinuation bool) (string, error) {
+func (p *parser) readValue(in []byte,
+	ignoreContinuation, ignoreInlineComment, unescapeValueDoubleQuotes, unescapeValueCommentSymbols bool) (string, error) {
+
 	line := strings.TrimLeftFunc(string(in), unicode.IsSpace)
 	if len(line) == 0 {
 		return "", nil
@@ -189,6 +206,8 @@ func (p *parser) readValue(in []byte, ignoreContinuation bool) (string, error) {
 		valQuote = `"""`
 	} else if line[0] == '`' {
 		valQuote = "`"
+	} else if unescapeValueDoubleQuotes && line[0] == '"' {
+		valQuote = `"`
 	}
 
 	if len(valQuote) > 0 {
@@ -199,27 +218,40 @@ func (p *parser) readValue(in []byte, ignoreContinuation bool) (string, error) {
 			return p.readMultilines(line, line[startIdx:], valQuote)
 		}
 
+		if unescapeValueDoubleQuotes && valQuote == `"` {
+			return strings.Replace(line[startIdx:pos+startIdx], `\"`, `"`, -1), nil
+		}
 		return line[startIdx : pos+startIdx], nil
 	}
 
-	// Won't be able to reach here if value only contains whitespace.
+	// Won't be able to reach here if value only contains whitespace
 	line = strings.TrimSpace(line)
 
-	// Check continuation lines when desired.
+	// Check continuation lines when desired
 	if !ignoreContinuation && line[len(line)-1] == '\\' {
 		return p.readContinuationLines(line[:len(line)-1])
 	}
 
-	i := strings.IndexAny(line, "#;")
-	if i > -1 {
-		p.comment.WriteString(line[i:])
-		line = strings.TrimSpace(line[:i])
+	// Check if ignore inline comment
+	if !ignoreInlineComment {
+		i := strings.IndexAny(line, "#;")
+		if i > -1 {
+			p.comment.WriteString(line[i:])
+			line = strings.TrimSpace(line[:i])
+		}
 	}
 
-	// Trim single quotes
+	// Trim single and double quotes
 	if hasSurroundedQuote(line, '\'') ||
 		hasSurroundedQuote(line, '"') {
 		line = line[1 : len(line)-1]
+	} else if len(valQuote) == 0 && unescapeValueCommentSymbols {
+		if strings.Contains(line, `\;`) {
+			line = strings.Replace(line, `\;`, ";", -1)
+		}
+		if strings.Contains(line, `\#`) {
+			line = strings.Replace(line, `\#`, "#", -1)
+		}
 	}
 	return line, nil
 }
@@ -232,15 +264,32 @@ func (f *File) parse(reader io.Reader) (err error) {
 	}
 
 	// Ignore error because default section name is never empty string.
-	section, _ := f.NewSection(DEFAULT_SECTION)
+	name := DEFAULT_SECTION
+	if f.options.Insensitive {
+		name = strings.ToLower(DEFAULT_SECTION)
+	}
+	section, _ := f.NewSection(name)
+
+	// This "last" is not strictly equivalent to "previous one" if current key is not the first nested key
+	var isLastValueEmpty bool
+	var lastRegularKey *Key
 
 	var line []byte
+	var inUnparseableSection bool
 	for !p.isEOF {
 		line, err = p.readUntil('\n')
 		if err != nil {
 			return err
 		}
 
+		if f.options.AllowNestedValues &&
+			isLastValueEmpty && len(line) > 0 {
+			if line[0] == ' ' || line[0] == '\t' {
+				lastRegularKey.addNestedValue(string(bytes.TrimSpace(line)))
+				continue
+			}
+		}
+
 		line = bytes.TrimLeftFunc(line, unicode.IsSpace)
 		if len(line) == 0 {
 			continue
@@ -280,6 +329,21 @@ func (f *File) parse(reader io.Reader) (err error) {
 			// Reset aotu-counter and comments
 			p.comment.Reset()
 			p.count = 1
+
+			inUnparseableSection = false
+			for i := range f.options.UnparseableSections {
+				if f.options.UnparseableSections[i] == name ||
+					(f.options.Insensitive && strings.ToLower(f.options.UnparseableSections[i]) == strings.ToLower(name)) {
+					inUnparseableSection = true
+					continue
+				}
+			}
+			continue
+		}
+
+		if inUnparseableSection {
+			section.isRawSection = true
+			section.rawBody += string(line)
 			continue
 		}
 
@@ -287,11 +351,18 @@ func (f *File) parse(reader io.Reader) (err error) {
 		if err != nil {
 			// Treat as boolean key when desired, and whole line is key name.
 			if IsErrDelimiterNotFound(err) && f.options.AllowBooleanKeys {
-				key, err := section.NewKey(string(line), "true")
+				kname, err := p.readValue(line,
+					f.options.IgnoreContinuation,
+					f.options.IgnoreInlineComment,
+					f.options.UnescapeValueDoubleQuotes,
+					f.options.UnescapeValueCommentSymbols)
+				if err != nil {
+					return err
+				}
+				key, err := section.NewBooleanKey(kname)
 				if err != nil {
 					return err
 				}
-				key.isBooleanType = true
 				key.Comment = strings.TrimSpace(p.comment.String())
 				p.comment.Reset()
 				continue
@@ -307,19 +378,24 @@ func (f *File) parse(reader io.Reader) (err error) {
 			p.count++
 		}
 
-		key, err := section.NewKey(kname, "")
+		value, err := p.readValue(line[offset:],
+			f.options.IgnoreContinuation,
+			f.options.IgnoreInlineComment,
+			f.options.UnescapeValueDoubleQuotes,
+			f.options.UnescapeValueCommentSymbols)
+		if err != nil {
+			return err
+		}
+		isLastValueEmpty = len(value) == 0
+
+		key, err := section.NewKey(kname, value)
 		if err != nil {
 			return err
 		}
 		key.isAutoIncrement = isAutoIncr
-
-		value, err := p.readValue(line[offset:], f.options.IgnoreContinuation)
-		if err != nil {
-			return err
-		}
-		key.SetValue(value)
 		key.Comment = strings.TrimSpace(p.comment.String())
 		p.comment.Reset()
+		lastRegularKey = key
 	}
 	return nil
 }

vendor/github.com/go-ini/ini/section.go

@@ -28,10 +28,19 @@ type Section struct {
 	keys     map[string]*Key
 	keyList  []string
 	keysHash map[string]string
+
+	isRawSection bool
+	rawBody      string
 }
 
 func newSection(f *File, name string) *Section {
-	return &Section{f, "", name, make(map[string]*Key), make([]string, 0, 10), make(map[string]string)}
+	return &Section{
+		f:        f,
+		name:     name,
+		keys:     make(map[string]*Key),
+		keyList:  make([]string, 0, 10),
+		keysHash: make(map[string]string),
+	}
 }
 
 // Name returns name of Section.
@@ -39,6 +48,20 @@ func (s *Section) Name() string {
 	return s.name
 }
 
+// Body returns rawBody of Section if the section was marked as unparseable.
+// It still follows the other rules of the INI format surrounding leading/trailing whitespace.
+func (s *Section) Body() string {
+	return strings.TrimSpace(s.rawBody)
+}
+
+// SetBody updates body content only if section is raw.
+func (s *Section) SetBody(body string) {
+	if !s.isRawSection {
+		return
+	}
+	s.rawBody = body
+}
+
 // NewKey creates a new key to given section.
 func (s *Section) NewKey(name, val string) (*Key, error) {
 	if len(name) == 0 {
@@ -53,20 +76,33 @@ func (s *Section) NewKey(name, val string) (*Key, error) {
 	}
 
 	if inSlice(name, s.keyList) {
-		s.keys[name].value = val
+		if s.f.options.AllowShadows {
+			if err := s.keys[name].addShadow(val); err != nil {
+				return nil, err
+			}
+		} else {
+			s.keys[name].value = val
+		}
 		return s.keys[name], nil
 	}
 
 	s.keyList = append(s.keyList, name)
-	s.keys[name] = &Key{
-		s:     s,
-		name:  name,
-		value: val,
-	}
+	s.keys[name] = newKey(s, name, val)
 	s.keysHash[name] = val
 	return s.keys[name], nil
 }
 
+// NewBooleanKey creates a new boolean type key to given section.
+func (s *Section) NewBooleanKey(name string) (*Key, error) {
+	key, err := s.NewKey(name, "true")
+	if err != nil {
+		return nil, err
+	}
+
+	key.isBooleanType = true
+	return key, nil
+}
+
 // GetKey returns key in section by given name.
 func (s *Section) GetKey(name string) (*Key, error) {
 	// FIXME: change to section level lock?
@@ -108,6 +144,7 @@ func (s *Section) HasKey(name string) bool {
 }
 
 // Haskey is a backwards-compatible name for HasKey.
+// TODO: delete me in v2
 func (s *Section) Haskey(name string) bool {
 	return s.HasKey(name)
 }
@@ -204,3 +241,17 @@ func (s *Section) DeleteKey(name string) {
 		}
 	}
 }
+
+// ChildSections returns a list of child sections of current section.
+// For example, "[parent.child1]" and "[parent.child12]" are child sections
+// of section "[parent]".
+func (s *Section) ChildSections() []*Section {
+	prefix := s.name + "."
+	children := make([]*Section, 0, 3)
+	for _, name := range s.f.sectionList {
+		if strings.HasPrefix(name, prefix) {
+			children = append(children, s.f.sections[name])
+		}
+	}
+	return children
+}

vendor/github.com/go-ini/ini/struct.go

@@ -78,34 +78,44 @@ func parseDelim(actual string) string {
 var reflectTime = reflect.TypeOf(time.Now()).Kind()
 
 // setSliceWithProperType sets proper values to slice based on its type.
-func setSliceWithProperType(key *Key, field reflect.Value, delim string) error {
-	strs := key.Strings(delim)
+func setSliceWithProperType(key *Key, field reflect.Value, delim string, allowShadow, isStrict bool) error {
+	var strs []string
+	if allowShadow {
+		strs = key.StringsWithShadows(delim)
+	} else {
+		strs = key.Strings(delim)
+	}
+
 	numVals := len(strs)
 	if numVals == 0 {
 		return nil
 	}
 
 	var vals interface{}
+	var err error
 
 	sliceOf := field.Type().Elem().Kind()
 	switch sliceOf {
 	case reflect.String:
 		vals = strs
 	case reflect.Int:
-		vals = key.Ints(delim)
+		vals, err = key.parseInts(strs, true, false)
 	case reflect.Int64:
-		vals = key.Int64s(delim)
+		vals, err = key.parseInt64s(strs, true, false)
 	case reflect.Uint:
-		vals = key.Uints(delim)
+		vals, err = key.parseUints(strs, true, false)
 	case reflect.Uint64:
-		vals = key.Uint64s(delim)
+		vals, err = key.parseUint64s(strs, true, false)
 	case reflect.Float64:
-		vals = key.Float64s(delim)
+		vals, err = key.parseFloat64s(strs, true, false)
 	case reflectTime:
-		vals = key.Times(delim)
+		vals, err = key.parseTimesFormat(time.RFC3339, strs, true, false)
 	default:
 		return fmt.Errorf("unsupported type '[]%s'", sliceOf)
 	}
+	if err != nil && isStrict {
+		return err
+	}
 
 	slice := reflect.MakeSlice(field.Type(), numVals, numVals)
 	for i := 0; i < numVals; i++ {
@@ -130,10 +140,17 @@ func setSliceWithProperType(key *Key, field reflect.Value, delim string) error {
 	return nil
 }
 
+func wrapStrictError(err error, isStrict bool) error {
+	if isStrict {
+		return err
+	}
+	return nil
+}
+
 // setWithProperType sets proper value to field based on its type,
 // but it does not return error for failing parsing,
 // because we want to use default value that is already assigned to strcut.
-func setWithProperType(t reflect.Type, key *Key, field reflect.Value, delim string) error {
+func setWithProperType(t reflect.Type, key *Key, field reflect.Value, delim string, allowShadow, isStrict bool) error {
 	switch t.Kind() {
 	case reflect.String:
 		if len(key.String()) == 0 {
@@ -143,20 +160,20 @@ func setWithProperType(t reflect.Type, key *Key, field reflect.Value, delim stri
 	case reflect.Bool:
 		boolVal, err := key.Bool()
 		if err != nil {
-			return nil
+			return wrapStrictError(err, isStrict)
 		}
 		field.SetBool(boolVal)
 	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
 		durationVal, err := key.Duration()
 		// Skip zero value
-		if err == nil && int(durationVal) > 0 {
+		if err == nil && int64(durationVal) > 0 {
 			field.Set(reflect.ValueOf(durationVal))
 			return nil
 		}
 
 		intVal, err := key.Int64()
-		if err != nil || intVal == 0 {
-			return nil
+		if err != nil {
+			return wrapStrictError(err, isStrict)
 		}
 		field.SetInt(intVal)
 	//	byte is an alias for uint8, so supporting uint8 breaks support for byte
@@ -170,31 +187,43 @@ func setWithProperType(t reflect.Type, key *Key, field reflect.Value, delim stri
 
 		uintVal, err := key.Uint64()
 		if err != nil {
-			return nil
+			return wrapStrictError(err, isStrict)
 		}
 		field.SetUint(uintVal)
 
-	case reflect.Float64:
+	case reflect.Float32, reflect.Float64:
 		floatVal, err := key.Float64()
 		if err != nil {
-			return nil
+			return wrapStrictError(err, isStrict)
 		}
 		field.SetFloat(floatVal)
 	case reflectTime:
 		timeVal, err := key.Time()
 		if err != nil {
-			return nil
+			return wrapStrictError(err, isStrict)
 		}
 		field.Set(reflect.ValueOf(timeVal))
 	case reflect.Slice:
-		return setSliceWithProperType(key, field, delim)
+		return setSliceWithProperType(key, field, delim, allowShadow, isStrict)
 	default:
 		return fmt.Errorf("unsupported type '%s'", t)
 	}
 	return nil
 }
 
-func (s *Section) mapTo(val reflect.Value) error {
+func parseTagOptions(tag string) (rawName string, omitEmpty bool, allowShadow bool) {
+	opts := strings.SplitN(tag, ",", 3)
+	rawName = opts[0]
+	if len(opts) > 1 {
+		omitEmpty = opts[1] == "omitempty"
+	}
+	if len(opts) > 2 {
+		allowShadow = opts[2] == "allowshadow"
+	}
+	return rawName, omitEmpty, allowShadow
+}
+
+func (s *Section) mapTo(val reflect.Value, isStrict bool) error {
 	if val.Kind() == reflect.Ptr {
 		val = val.Elem()
 	}
@@ -209,8 +238,8 @@ func (s *Section) mapTo(val reflect.Value) error {
 			continue
 		}
 
-		opts := strings.SplitN(tag, ",", 2) // strip off possible omitempty
-		fieldName := s.parseFieldName(tpField.Name, opts[0])
+		rawName, _, allowShadow := parseTagOptions(tag)
+		fieldName := s.parseFieldName(tpField.Name, rawName)
 		if len(fieldName) == 0 || !field.CanSet() {
 			continue
 		}
@@ -223,7 +252,7 @@ func (s *Section) mapTo(val reflect.Value) error {
 
 		if isAnonymous || isStruct {
 			if sec, err := s.f.GetSection(fieldName); err == nil {
-				if err = sec.mapTo(field); err != nil {
+				if err = sec.mapTo(field, isStrict); err != nil {
 					return fmt.Errorf("error mapping field(%s): %v", fieldName, err)
 				}
 				continue
@@ -231,7 +260,8 @@ func (s *Section) mapTo(val reflect.Value) error {
 		}
 
 		if key, err := s.GetKey(fieldName); err == nil {
-			if err = setWithProperType(tpField.Type, key, field, parseDelim(tpField.Tag.Get("delim"))); err != nil {
+			delim := parseDelim(tpField.Tag.Get("delim"))
+			if err = setWithProperType(tpField.Type, key, field, delim, allowShadow, isStrict); err != nil {
 				return fmt.Errorf("error mapping field(%s): %v", fieldName, err)
 			}
 		}
@@ -250,7 +280,22 @@ func (s *Section) MapTo(v interface{}) error {
 		return errors.New("cannot map to non-pointer struct")
 	}
 
-	return s.mapTo(val)
+	return s.mapTo(val, false)
+}
+
+// MapTo maps section to given struct in strict mode,
+// which returns all possible error including value parsing error.
+func (s *Section) StrictMapTo(v interface{}) error {
+	typ := reflect.TypeOf(v)
+	val := reflect.ValueOf(v)
+	if typ.Kind() == reflect.Ptr {
+		typ = typ.Elem()
+		val = val.Elem()
+	} else {
+		return errors.New("cannot map to non-pointer struct")
+	}
+
+	return s.mapTo(val, true)
 }
 
 // MapTo maps file to given struct.
@@ -258,6 +303,12 @@ func (f *File) MapTo(v interface{}) error {
 	return f.Section("").MapTo(v)
 }
 
+// MapTo maps file to given struct in strict mode,
+// which returns all possible error including value parsing error.
+func (f *File) StrictMapTo(v interface{}) error {
+	return f.Section("").StrictMapTo(v)
+}
+
 // MapTo maps data sources to given struct with name mapper.
 func MapToWithMapper(v interface{}, mapper NameMapper, source interface{}, others ...interface{}) error {
 	cfg, err := Load(source, others...)
@@ -268,11 +319,28 @@ func MapToWithMapper(v interface{}, mapper NameMapper, source interface{}, other
 	return cfg.MapTo(v)
 }
 
+// StrictMapToWithMapper maps data sources to given struct with name mapper in strict mode,
+// which returns all possible error including value parsing error.
+func StrictMapToWithMapper(v interface{}, mapper NameMapper, source interface{}, others ...interface{}) error {
+	cfg, err := Load(source, others...)
+	if err != nil {
+		return err
+	}
+	cfg.NameMapper = mapper
+	return cfg.StrictMapTo(v)
+}
+
 // MapTo maps data sources to given struct.
 func MapTo(v, source interface{}, others ...interface{}) error {
 	return MapToWithMapper(v, nil, source, others...)
 }
 
+// StrictMapTo maps data sources to given struct in strict mode,
+// which returns all possible error including value parsing error.
+func StrictMapTo(v, source interface{}, others ...interface{}) error {
+	return StrictMapToWithMapper(v, nil, source, others...)
+}
+
 // reflectSliceWithProperType does the opposite thing as setSliceWithProperType.
 func reflectSliceWithProperType(key *Key, field reflect.Value, delim string) error {
 	slice := field.Slice(0, field.Len())
@@ -340,10 +408,11 @@ func isEmptyValue(v reflect.Value) bool {
 		return v.Uint() == 0
 	case reflect.Float32, reflect.Float64:
 		return v.Float() == 0
-	case reflectTime:
-		return v.Interface().(time.Time).IsZero()
 	case reflect.Interface, reflect.Ptr:
 		return v.IsNil()
+	case reflectTime:
+		t, ok := v.Interface().(time.Time)
+		return ok && t.IsZero()
 	}
 	return false
 }
@@ -381,6 +450,12 @@ func (s *Section) reflectFrom(val reflect.Value) error {
 				// Note: fieldName can never be empty here, ignore error.
 				sec, _ = s.f.NewSection(fieldName)
 			}
+
+			// Add comment from comment tag
+			if len(sec.Comment) == 0 {
+				sec.Comment = tpField.Tag.Get("comment")
+			}
+
 			if err = sec.reflectFrom(field); err != nil {
 				return fmt.Errorf("error reflecting field (%s): %v", fieldName, err)
 			}
@@ -392,6 +467,12 @@ func (s *Section) reflectFrom(val reflect.Value) error {
 		if err != nil {
 			key, _ = s.NewKey(fieldName, "")
 		}
+
+		// Add comment from comment tag
+		if len(key.Comment) == 0 {
+			key.Comment = tpField.Tag.Get("comment")
+		}
+
 		if err = reflectWithProperType(tpField.Type, key, field, parseDelim(tpField.Tag.Get("delim"))); err != nil {
 			return fmt.Errorf("error reflecting field (%s): %v", fieldName, err)
 		}

vendor/github.com/go-ini/ini/testdata/UTF-8-BOM.ini

@@ -0,0 +1,2 @@
+[author]
+E-MAIL = u@gogs.io

vendor/github.com/go-ini/ini/testdata/full.ini

@@ -0,0 +1,83 @@
+; Package name
+NAME        = ini
+; Package version
+VERSION     = v1
+; Package import path
+IMPORT_PATH = gopkg.in/%(NAME)s.%(VERSION)s
+
+# Information about package author
+# Bio can be written in multiple lines.
+[author]
+NAME   = Unknwon
+E-MAIL = u@gogs.io
+GITHUB = https://github.com/%(NAME)s
+BIO    = """Gopher.
+Coding addict.
+Good man.
+"""  # Succeeding comment
+
+[package]
+CLONE_URL = https://%(IMPORT_PATH)s
+
+[package.sub]
+UNUSED_KEY = should be deleted
+
+[features]
+-: Support read/write comments of keys and sections
+-: Support auto-increment of key names
+-: Support load multiple files to overwrite key values
+
+[types]
+STRING     = str
+BOOL       = true
+BOOL_FALSE = false
+FLOAT64    = 1.25
+INT        = 10
+TIME       = 2015-01-01T20:17:05Z
+DURATION   = 2h45m
+UINT       = 3
+
+[array]
+STRINGS  = en, zh, de
+FLOAT64S = 1.1, 2.2, 3.3
+INTS     = 1, 2, 3
+UINTS    = 1, 2, 3
+TIMES    = 2015-01-01T20:17:05Z,2015-01-01T20:17:05Z,2015-01-01T20:17:05Z
+
+[note]
+empty_lines = next line is empty\
+
+; Comment before the section
+[comments] ; This is a comment for the section too
+; Comment before key
+key  = "value"
+key2 = "value2" ; This is a comment for key2
+key3 = "one", "two", "three"
+
+[string escapes]
+key1 = value1, value2, value3
+key2 = value1\, value2
+key3 = val\ue1, value2
+key4 = value1\\, value\\\\2
+key5 = value1\,, value2
+key6 = aaa bbb\ and\ space ccc
+
+[advance]
+value with quotes      = "some value"
+value quote2 again     = 'some value'
+includes comment sign  = `my#password`
+includes comment sign2 = `my;password`
+true                   = 2+3=5
+"1+1=2"                = true
+"""6+1=7"""            = true
+"""`5+5`"""            = 10
+`"6+6"`                = 12
+`7-2=4`                = false
+ADDRESS                = `404 road,
+NotFound, State, 50000`
+two_lines = how about \
+	continuation lines?
+lots_of_lines = 1 \
+	2 \
+	3 \
+	4 \

vendor/github.com/go-ini/ini/testdata/minimal.ini

@@ -0,0 +1,2 @@
+[author]
+E-MAIL = u@gogs.io