Update dependencies (#975)

1 files changed, 526 insertions, 0 deletions

diff --git a/vendor/gopkg.in/ini.v1/parser.go b/vendor/gopkg.in/ini.v1/parser.go
new file mode 100644
index 00000000..53ab45c4
--- /dev/null
+++ b/vendor/gopkg.in/ini.v1/parser.go
@@ -0,0 +1,526 @@
+// Copyright 2015 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 (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"regexp"
+	"strconv"
+	"strings"
+	"unicode"
+)
+
+const minReaderBufferSize = 4096
+
+var pythonMultiline = regexp.MustCompile(`^([\t\f ]+)(.*)`)
+
+type parserOptions struct {
+	IgnoreContinuation          bool
+	IgnoreInlineComment         bool
+	AllowPythonMultilineValues  bool
+	SpaceBeforeInlineComment    bool
+	UnescapeValueDoubleQuotes   bool
+	UnescapeValueCommentSymbols bool
+	PreserveSurroundedQuote     bool
+	DebugFunc                   DebugFunc
+	ReaderBufferSize            int
+}
+
+type parser struct {
+	buf     *bufio.Reader
+	options parserOptions
+
+	isEOF   bool
+	count   int
+	comment *bytes.Buffer
+}
+
+func (p *parser) debug(format string, args ...interface{}) {
+	if p.options.DebugFunc != nil {
+		p.options.DebugFunc(fmt.Sprintf(format, args...))
+	}
+}
+
+func newParser(r io.Reader, opts parserOptions) *parser {
+	size := opts.ReaderBufferSize
+	if size < minReaderBufferSize {
+		size = minReaderBufferSize
+	}
+
+	return &parser{
+		buf:     bufio.NewReaderSize(r, size),
+		options: opts,
+		count:   1,
+		comment: &bytes.Buffer{},
+	}
+}
+
+// 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(2)
+	if err != nil && err != io.EOF {
+		return err
+	} else if len(mask) < 2 {
+		return nil
+	}
+
+	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
+}
+
+func (p *parser) readUntil(delim byte) ([]byte, error) {
+	data, err := p.buf.ReadBytes(delim)
+	if err != nil {
+		if err == io.EOF {
+			p.isEOF = true
+		} else {
+			return nil, err
+		}
+	}
+	return data, nil
+}
+
+func cleanComment(in []byte) ([]byte, bool) {
+	i := bytes.IndexAny(in, "#;")
+	if i == -1 {
+		return nil, false
+	}
+	return in[i:], true
+}
+
+func readKeyName(delimiters string, in []byte) (string, int, error) {
+	line := string(in)
+
+	// Check if key name surrounded by quotes.
+	var keyQuote string
+	if line[0] == '"' {
+		if len(line) > 6 && string(line[0:3]) == `"""` {
+			keyQuote = `"""`
+		} else {
+			keyQuote = `"`
+		}
+	} else if line[0] == '`' {
+		keyQuote = "`"
+	}
+
+	// Get out key name
+	endIdx := -1
+	if len(keyQuote) > 0 {
+		startIdx := len(keyQuote)
+		// FIXME: fail case -> """"""name"""=value
+		pos := strings.Index(line[startIdx:], keyQuote)
+		if pos == -1 {
+			return "", -1, fmt.Errorf("missing closing key quote: %s", line)
+		}
+		pos += startIdx
+
+		// Find key-value delimiter
+		i := strings.IndexAny(line[pos+startIdx:], delimiters)
+		if i < 0 {
+			return "", -1, ErrDelimiterNotFound{line}
+		}
+		endIdx = pos + i
+		return strings.TrimSpace(line[startIdx:pos]), endIdx + startIdx + 1, nil
+	}
+
+	endIdx = strings.IndexAny(line, delimiters)
+	if endIdx < 0 {
+		return "", -1, ErrDelimiterNotFound{line}
+	}
+	return strings.TrimSpace(line[0:endIdx]), endIdx + 1, nil
+}
+
+func (p *parser) readMultilines(line, val, valQuote string) (string, error) {
+	for {
+		data, err := p.readUntil('\n')
+		if err != nil {
+			return "", err
+		}
+		next := string(data)
+
+		pos := strings.LastIndex(next, valQuote)
+		if pos > -1 {
+			val += next[:pos]
+
+			comment, has := cleanComment([]byte(next[pos:]))
+			if has {
+				p.comment.Write(bytes.TrimSpace(comment))
+			}
+			break
+		}
+		val += next
+		if p.isEOF {
+			return "", fmt.Errorf("missing closing key quote from '%s' to '%s'", line, next)
+		}
+	}
+	return val, nil
+}
+
+func (p *parser) readContinuationLines(val string) (string, error) {
+	for {
+		data, err := p.readUntil('\n')
+		if err != nil {
+			return "", err
+		}
+		next := strings.TrimSpace(string(data))
+
+		if len(next) == 0 {
+			break
+		}
+		val += next
+		if val[len(val)-1] != '\\' {
+			break
+		}
+		val = val[:len(val)-1]
+	}
+	return val, nil
+}
+
+// hasSurroundedQuote check if and only if the first and last characters
+// 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 &&
+		strings.IndexByte(in[1:], quote) == len(in)-2
+}
+
+func (p *parser) readValue(in []byte, bufferSize int) (string, error) {
+
+	line := strings.TrimLeftFunc(string(in), unicode.IsSpace)
+	if len(line) == 0 {
+		if p.options.AllowPythonMultilineValues && len(in) > 0 && in[len(in)-1] == '\n' {
+			return p.readPythonMultilines(line, bufferSize)
+		}
+		return "", nil
+	}
+
+	var valQuote string
+	if len(line) > 3 && string(line[0:3]) == `"""` {
+		valQuote = `"""`
+	} else if line[0] == '`' {
+		valQuote = "`"
+	} else if p.options.UnescapeValueDoubleQuotes && line[0] == '"' {
+		valQuote = `"`
+	}
+
+	if len(valQuote) > 0 {
+		startIdx := len(valQuote)
+		pos := strings.LastIndex(line[startIdx:], valQuote)
+		// Check for multi-line value
+		if pos == -1 {
+			return p.readMultilines(line, line[startIdx:], valQuote)
+		}
+
+		if p.options.UnescapeValueDoubleQuotes && valQuote == `"` {
+			return strings.Replace(line[startIdx:pos+startIdx], `\"`, `"`, -1), nil
+		}
+		return line[startIdx : pos+startIdx], nil
+	}
+
+	lastChar := line[len(line)-1]
+	// Won't be able to reach here if value only contains whitespace
+	line = strings.TrimSpace(line)
+	trimmedLastChar := line[len(line)-1]
+
+	// Check continuation lines when desired
+	if !p.options.IgnoreContinuation && trimmedLastChar == '\\' {
+		return p.readContinuationLines(line[:len(line)-1])
+	}
+
+	// Check if ignore inline comment
+	if !p.options.IgnoreInlineComment {
+		var i int
+		if p.options.SpaceBeforeInlineComment {
+			i = strings.Index(line, " #")
+			if i == -1 {
+				i = strings.Index(line, " ;")
+			}
+
+		} else {
+			i = strings.IndexAny(line, "#;")
+		}
+
+		if i > -1 {
+			p.comment.WriteString(line[i:])
+			line = strings.TrimSpace(line[:i])
+		}
+
+	}
+
+	// Trim single and double quotes
+	if (hasSurroundedQuote(line, '\'') ||
+		hasSurroundedQuote(line, '"')) && !p.options.PreserveSurroundedQuote {
+		line = line[1 : len(line)-1]
+	} else if len(valQuote) == 0 && p.options.UnescapeValueCommentSymbols {
+		if strings.Contains(line, `\;`) {
+			line = strings.Replace(line, `\;`, ";", -1)
+		}
+		if strings.Contains(line, `\#`) {
+			line = strings.Replace(line, `\#`, "#", -1)
+		}
+	} else if p.options.AllowPythonMultilineValues && lastChar == '\n' {
+		return p.readPythonMultilines(line, bufferSize)
+	}
+
+	return line, nil
+}
+
+func (p *parser) readPythonMultilines(line string, bufferSize int) (string, error) {
+	parserBufferPeekResult, _ := p.buf.Peek(bufferSize)
+	peekBuffer := bytes.NewBuffer(parserBufferPeekResult)
+
+	indentSize := 0
+	for {
+		peekData, peekErr := peekBuffer.ReadBytes('\n')
+		if peekErr != nil {
+			if peekErr == io.EOF {
+				p.debug("readPythonMultilines: io.EOF, peekData: %q, line: %q", string(peekData), line)
+				return line, nil
+			}
+
+			p.debug("readPythonMultilines: failed to peek with error: %v", peekErr)
+			return "", peekErr
+		}
+
+		p.debug("readPythonMultilines: parsing %q", string(peekData))
+
+		peekMatches := pythonMultiline.FindStringSubmatch(string(peekData))
+		p.debug("readPythonMultilines: matched %d parts", len(peekMatches))
+		for n, v := range peekMatches {
+			p.debug("   %d: %q", n, v)
+		}
+
+		// Return if not a Python multiline value.
+		if len(peekMatches) != 3 {
+			p.debug("readPythonMultilines: end of value, got: %q", line)
+			return line, nil
+		}
+
+		// Determine indent size and line prefix.
+		currentIndentSize := len(peekMatches[1])
+		if indentSize < 1 {
+			indentSize = currentIndentSize
+			p.debug("readPythonMultilines: indent size is %d", indentSize)
+		}
+
+		// Make sure each line is indented at least as far as first line.
+		if currentIndentSize < indentSize {
+			p.debug("readPythonMultilines: end of value, current indent: %d, expected indent: %d, line: %q", currentIndentSize, indentSize, line)
+			return line, nil
+		}
+
+		// Advance the parser reader (buffer) in-sync with the peek buffer.
+		_, err := p.buf.Discard(len(peekData))
+		if err != nil {
+			p.debug("readPythonMultilines: failed to skip to the end, returning error")
+			return "", err
+		}
+
+		// Handle indented empty line.
+		line += "\n" + peekMatches[1][indentSize:] + peekMatches[2]
+	}
+}
+
+// parse parses data through an io.Reader.
+func (f *File) parse(reader io.Reader) (err error) {
+	p := newParser(reader, parserOptions{
+		IgnoreContinuation:          f.options.IgnoreContinuation,
+		IgnoreInlineComment:         f.options.IgnoreInlineComment,
+		AllowPythonMultilineValues:  f.options.AllowPythonMultilineValues,
+		SpaceBeforeInlineComment:    f.options.SpaceBeforeInlineComment,
+		UnescapeValueDoubleQuotes:   f.options.UnescapeValueDoubleQuotes,
+		UnescapeValueCommentSymbols: f.options.UnescapeValueCommentSymbols,
+		PreserveSurroundedQuote:     f.options.PreserveSurroundedQuote,
+		DebugFunc:                   f.options.DebugFunc,
+		ReaderBufferSize:            f.options.ReaderBufferSize,
+	})
+	if err = p.BOM(); err != nil {
+		return fmt.Errorf("BOM: %v", err)
+	}
+
+	// Ignore error because default section name is never empty string.
+	name := DefaultSection
+	if f.options.Insensitive {
+		name = strings.ToLower(DefaultSection)
+	}
+	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
+
+	// NOTE: Iterate and increase `currentPeekSize` until
+	// the size of the parser buffer is found.
+	// TODO(unknwon): When Golang 1.10 is the lowest version supported, replace with `parserBufferSize := p.buf.Size()`.
+	parserBufferSize := 0
+	// NOTE: Peek 4kb at a time.
+	currentPeekSize := minReaderBufferSize
+
+	if f.options.AllowPythonMultilineValues {
+		for {
+			peekBytes, _ := p.buf.Peek(currentPeekSize)
+			peekBytesLength := len(peekBytes)
+
+			if parserBufferSize >= peekBytesLength {
+				break
+			}
+
+			currentPeekSize *= 2
+			parserBufferSize = peekBytesLength
+		}
+	}
+
+	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
+		}
+
+		// Comments
+		if line[0] == '#' || line[0] == ';' {
+			// Note: we do not care ending line break,
+			// it is needed for adding second line,
+			// so just clean it once at the end when set to value.
+			p.comment.Write(line)
+			continue
+		}
+
+		// Section
+		if line[0] == '[' {
+			// Read to the next ']' (TODO: support quoted strings)
+			closeIdx := bytes.LastIndexByte(line, ']')
+			if closeIdx == -1 {
+				return fmt.Errorf("unclosed section: %s", line)
+			}
+
+			name := string(line[1:closeIdx])
+			section, err = f.NewSection(name)
+			if err != nil {
+				return err
+			}
+
+			comment, has := cleanComment(line[closeIdx+1:])
+			if has {
+				p.comment.Write(comment)
+			}
+
+			section.Comment = strings.TrimSpace(p.comment.String())
+
+			// 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
+		}
+
+		kname, offset, err := readKeyName(f.options.KeyValueDelimiters, line)
+		if err != nil {
+			// Treat as boolean key when desired, and whole line is key name.
+			if IsErrDelimiterNotFound(err) {
+				switch {
+				case f.options.AllowBooleanKeys:
+					kname, err := p.readValue(line, parserBufferSize)
+					if err != nil {
+						return err
+					}
+					key, err := section.NewBooleanKey(kname)
+					if err != nil {
+						return err
+					}
+					key.Comment = strings.TrimSpace(p.comment.String())
+					p.comment.Reset()
+					continue
+
+				case f.options.SkipUnrecognizableLines:
+					continue
+				}
+			}
+			return err
+		}
+
+		// Auto increment.
+		isAutoIncr := false
+		if kname == "-" {
+			isAutoIncr = true
+			kname = "#" + strconv.Itoa(p.count)
+			p.count++
+		}
+
+		value, err := p.readValue(line[offset:], parserBufferSize)
+		if err != nil {
+			return err
+		}
+		isLastValueEmpty = len(value) == 0
+
+		key, err := section.NewKey(kname, value)
+		if err != nil {
+			return err
+		}
+		key.isAutoIncrement = isAutoIncr
+		key.Comment = strings.TrimSpace(p.comment.String())
+		p.comment.Reset()
+		lastRegularKey = key
+	}
+	return nil
+}