summaryrefslogtreecommitdiff
path: root/vendor/github.com/google/shlex
diff options
context:
space:
mode:
Diffstat (limited to 'vendor/github.com/google/shlex')
-rw-r--r--vendor/github.com/google/shlex/COPYING202
-rw-r--r--vendor/github.com/google/shlex/README2
-rw-r--r--vendor/github.com/google/shlex/shlex.go416
3 files changed, 620 insertions, 0 deletions
diff --git a/vendor/github.com/google/shlex/COPYING b/vendor/github.com/google/shlex/COPYING
new file mode 100644
index 000000000..d64569567
--- /dev/null
+++ b/vendor/github.com/google/shlex/COPYING
@@ -0,0 +1,202 @@
+
+ Apache License
+ Version 2.0, January 2004
+ http://www.apache.org/licenses/
+
+ TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+ 1. Definitions.
+
+ "License" shall mean the terms and conditions for use, reproduction,
+ and distribution as defined by Sections 1 through 9 of this document.
+
+ "Licensor" shall mean the copyright owner or entity authorized by
+ the copyright owner that is granting the License.
+
+ "Legal Entity" shall mean the union of the acting entity and all
+ other entities that control, are controlled by, or are under common
+ control with that entity. For the purposes of this definition,
+ "control" means (i) the power, direct or indirect, to cause the
+ direction or management of such entity, whether by contract or
+ otherwise, or (ii) ownership of fifty percent (50%) or more of the
+ outstanding shares, or (iii) beneficial ownership of such entity.
+
+ "You" (or "Your") shall mean an individual or Legal Entity
+ exercising permissions granted by this License.
+
+ "Source" form shall mean the preferred form for making modifications,
+ including but not limited to software source code, documentation
+ source, and configuration files.
+
+ "Object" form shall mean any form resulting from mechanical
+ transformation or translation of a Source form, including but
+ not limited to compiled object code, generated documentation,
+ and conversions to other media types.
+
+ "Work" shall mean the work of authorship, whether in Source or
+ Object form, made available under the License, as indicated by a
+ copyright notice that is included in or attached to the work
+ (an example is provided in the Appendix below).
+
+ "Derivative Works" shall mean any work, whether in Source or Object
+ form, that is based on (or derived from) the Work and for which the
+ editorial revisions, annotations, elaborations, or other modifications
+ represent, as a whole, an original work of authorship. For the purposes
+ of this License, Derivative Works shall not include works that remain
+ separable from, or merely link (or bind by name) to the interfaces of,
+ the Work and Derivative Works thereof.
+
+ "Contribution" shall mean any work of authorship, including
+ the original version of the Work and any modifications or additions
+ to that Work or Derivative Works thereof, that is intentionally
+ submitted to Licensor for inclusion in the Work by the copyright owner
+ or by an individual or Legal Entity authorized to submit on behalf of
+ the copyright owner. For the purposes of this definition, "submitted"
+ means any form of electronic, verbal, or written communication sent
+ to the Licensor or its representatives, including but not limited to
+ communication on electronic mailing lists, source code control systems,
+ and issue tracking systems that are managed by, or on behalf of, the
+ Licensor for the purpose of discussing and improving the Work, but
+ excluding communication that is conspicuously marked or otherwise
+ designated in writing by the copyright owner as "Not a Contribution."
+
+ "Contributor" shall mean Licensor and any individual or Legal Entity
+ on behalf of whom a Contribution has been received by Licensor and
+ subsequently incorporated within the Work.
+
+ 2. Grant of Copyright License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ copyright license to reproduce, prepare Derivative Works of,
+ publicly display, publicly perform, sublicense, and distribute the
+ Work and such Derivative Works in Source or Object form.
+
+ 3. Grant of Patent License. Subject to the terms and conditions of
+ this License, each Contributor hereby grants to You a perpetual,
+ worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+ (except as stated in this section) patent license to make, have made,
+ use, offer to sell, sell, import, and otherwise transfer the Work,
+ where such license applies only to those patent claims licensable
+ by such Contributor that are necessarily infringed by their
+ Contribution(s) alone or by combination of their Contribution(s)
+ with the Work to which such Contribution(s) was submitted. If You
+ institute patent litigation against any entity (including a
+ cross-claim or counterclaim in a lawsuit) alleging that the Work
+ or a Contribution incorporated within the Work constitutes direct
+ or contributory patent infringement, then any patent licenses
+ granted to You under this License for that Work shall terminate
+ as of the date such litigation is filed.
+
+ 4. Redistribution. You may reproduce and distribute copies of the
+ Work or Derivative Works thereof in any medium, with or without
+ modifications, and in Source or Object form, provided that You
+ meet the following conditions:
+
+ (a) You must give any other recipients of the Work or
+ Derivative Works a copy of this License; and
+
+ (b) You must cause any modified files to carry prominent notices
+ stating that You changed the files; and
+
+ (c) You must retain, in the Source form of any Derivative Works
+ that You distribute, all copyright, patent, trademark, and
+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
+
+ (d) If the Work includes a "NOTICE" text file as part of its
+ distribution, then any Derivative Works that You distribute must
+ include a readable copy of the attribution notices contained
+ within such NOTICE file, excluding those notices that do not
+ pertain to any part of the Derivative Works, in at least one
+ of the following places: within a NOTICE text file distributed
+ as part of the Derivative Works; within the Source form or
+ documentation, if provided along with the Derivative Works; or,
+ within a display generated by the Derivative Works, if and
+ wherever such third-party notices normally appear. The contents
+ of the NOTICE file are for informational purposes only and
+ do not modify the License. You may add Your own attribution
+ notices within Derivative Works that You distribute, alongside
+ or as an addendum to the NOTICE text from the Work, provided
+ that such additional attribution notices cannot be construed
+ as modifying the License.
+
+ You may add Your own copyright statement to Your modifications and
+ may provide additional or different license terms and conditions
+ for use, reproduction, or distribution of Your modifications, or
+ for any such Derivative Works as a whole, provided Your use,
+ reproduction, and distribution of the Work otherwise complies with
+ the conditions stated in this License.
+
+ 5. Submission of Contributions. Unless You explicitly state otherwise,
+ any Contribution intentionally submitted for inclusion in the Work
+ by You to the Licensor shall be under the terms and conditions of
+ this License, without any additional terms or conditions.
+ Notwithstanding the above, nothing herein shall supersede or modify
+ the terms of any separate license agreement you may have executed
+ with Licensor regarding such Contributions.
+
+ 6. Trademarks. This License does not grant permission to use the trade
+ names, trademarks, service marks, or product names of the Licensor,
+ except as required for reasonable and customary use in describing the
+ origin of the Work and reproducing the content of the NOTICE file.
+
+ 7. Disclaimer of Warranty. Unless required by applicable law or
+ agreed to in writing, Licensor provides the Work (and each
+ Contributor provides its Contributions) on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+ implied, including, without limitation, any warranties or conditions
+ of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+ PARTICULAR PURPOSE. You are solely responsible for determining the
+ appropriateness of using or redistributing the Work and assume any
+ risks associated with Your exercise of permissions under this License.
+
+ 8. Limitation of Liability. In no event and under no legal theory,
+ whether in tort (including negligence), contract, or otherwise,
+ unless required by applicable law (such as deliberate and grossly
+ negligent acts) or agreed to in writing, shall any Contributor be
+ liable to You for damages, including any direct, indirect, special,
+ incidental, or consequential damages of any character arising as a
+ result of this License or out of the use or inability to use the
+ Work (including but not limited to damages for loss of goodwill,
+ work stoppage, computer failure or malfunction, or any and all
+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
+
+ 9. Accepting Warranty or Additional Liability. While redistributing
+ the Work or Derivative Works thereof, You may choose to offer,
+ and charge a fee for, acceptance of support, warranty, indemnity,
+ or other liability obligations and/or rights consistent with this
+ License. However, in accepting such obligations, You may act only
+ on Your own behalf and on Your sole responsibility, not on behalf
+ of any other Contributor, and only if You agree to indemnify,
+ defend, and hold each Contributor harmless for any liability
+ incurred by, or claims asserted against, such Contributor by reason
+ of your accepting any such warranty or additional liability.
+
+ END OF TERMS AND CONDITIONS
+
+ APPENDIX: How to apply the Apache License to your work.
+
+ To apply the Apache License to your work, attach the following
+ boilerplate notice, with the fields enclosed by brackets "[]"
+ replaced with your own identifying information. (Don't include
+ the brackets!) The text should be enclosed in the appropriate
+ comment syntax for the file format. We also 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]
+
+ 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.
diff --git a/vendor/github.com/google/shlex/README b/vendor/github.com/google/shlex/README
new file mode 100644
index 000000000..c86bcc066
--- /dev/null
+++ b/vendor/github.com/google/shlex/README
@@ -0,0 +1,2 @@
+go-shlex is a simple lexer for go that supports shell-style quoting,
+commenting, and escaping.
diff --git a/vendor/github.com/google/shlex/shlex.go b/vendor/github.com/google/shlex/shlex.go
new file mode 100644
index 000000000..d98308bce
--- /dev/null
+++ b/vendor/github.com/google/shlex/shlex.go
@@ -0,0 +1,416 @@
+/*
+Copyright 2012 Google Inc. All Rights Reserved.
+
+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 shlex implements a simple lexer which splits input in to tokens using
+shell-style rules for quoting and commenting.
+
+The basic use case uses the default ASCII lexer to split a string into sub-strings:
+
+ shlex.Split("one \"two three\" four") -> []string{"one", "two three", "four"}
+
+To process a stream of strings:
+
+ l := NewLexer(os.Stdin)
+ for ; token, err := l.Next(); err != nil {
+ // process token
+ }
+
+To access the raw token stream (which includes tokens for comments):
+
+ t := NewTokenizer(os.Stdin)
+ for ; token, err := t.Next(); err != nil {
+ // process token
+ }
+
+*/
+package shlex
+
+import (
+ "bufio"
+ "fmt"
+ "io"
+ "strings"
+)
+
+// TokenType is a top-level token classification: A word, space, comment, unknown.
+type TokenType int
+
+// runeTokenClass is the type of a UTF-8 character classification: A quote, space, escape.
+type runeTokenClass int
+
+// the internal state used by the lexer state machine
+type lexerState int
+
+// Token is a (type, value) pair representing a lexographical token.
+type Token struct {
+ tokenType TokenType
+ value string
+}
+
+// Equal reports whether tokens a, and b, are equal.
+// Two tokens are equal if both their types and values are equal. A nil token can
+// never be equal to another token.
+func (a *Token) Equal(b *Token) bool {
+ if a == nil || b == nil {
+ return false
+ }
+ if a.tokenType != b.tokenType {
+ return false
+ }
+ return a.value == b.value
+}
+
+// Named classes of UTF-8 runes
+const (
+ spaceRunes = " \t\r\n"
+ escapingQuoteRunes = `"`
+ nonEscapingQuoteRunes = "'"
+ escapeRunes = `\`
+ commentRunes = "#"
+)
+
+// Classes of rune token
+const (
+ unknownRuneClass runeTokenClass = iota
+ spaceRuneClass
+ escapingQuoteRuneClass
+ nonEscapingQuoteRuneClass
+ escapeRuneClass
+ commentRuneClass
+ eofRuneClass
+)
+
+// Classes of lexographic token
+const (
+ UnknownToken TokenType = iota
+ WordToken
+ SpaceToken
+ CommentToken
+)
+
+// Lexer state machine states
+const (
+ startState lexerState = iota // no runes have been seen
+ inWordState // processing regular runes in a word
+ escapingState // we have just consumed an escape rune; the next rune is literal
+ escapingQuotedState // we have just consumed an escape rune within a quoted string
+ quotingEscapingState // we are within a quoted string that supports escaping ("...")
+ quotingState // we are within a string that does not support escaping ('...')
+ commentState // we are within a comment (everything following an unquoted or unescaped #
+)
+
+// tokenClassifier is used for classifying rune characters.
+type tokenClassifier map[rune]runeTokenClass
+
+func (typeMap tokenClassifier) addRuneClass(runes string, tokenType runeTokenClass) {
+ for _, runeChar := range runes {
+ typeMap[runeChar] = tokenType
+ }
+}
+
+// newDefaultClassifier creates a new classifier for ASCII characters.
+func newDefaultClassifier() tokenClassifier {
+ t := tokenClassifier{}
+ t.addRuneClass(spaceRunes, spaceRuneClass)
+ t.addRuneClass(escapingQuoteRunes, escapingQuoteRuneClass)
+ t.addRuneClass(nonEscapingQuoteRunes, nonEscapingQuoteRuneClass)
+ t.addRuneClass(escapeRunes, escapeRuneClass)
+ t.addRuneClass(commentRunes, commentRuneClass)
+ return t
+}
+
+// ClassifyRune classifiees a rune
+func (t tokenClassifier) ClassifyRune(runeVal rune) runeTokenClass {
+ return t[runeVal]
+}
+
+// Lexer turns an input stream into a sequence of tokens. Whitespace and comments are skipped.
+type Lexer Tokenizer
+
+// NewLexer creates a new lexer from an input stream.
+func NewLexer(r io.Reader) *Lexer {
+
+ return (*Lexer)(NewTokenizer(r))
+}
+
+// Next returns the next word, or an error. If there are no more words,
+// the error will be io.EOF.
+func (l *Lexer) Next() (string, error) {
+ for {
+ token, err := (*Tokenizer)(l).Next()
+ if err != nil {
+ return "", err
+ }
+ switch token.tokenType {
+ case WordToken:
+ return token.value, nil
+ case CommentToken:
+ // skip comments
+ default:
+ return "", fmt.Errorf("Unknown token type: %v", token.tokenType)
+ }
+ }
+}
+
+// Tokenizer turns an input stream into a sequence of typed tokens
+type Tokenizer struct {
+ input bufio.Reader
+ classifier tokenClassifier
+}
+
+// NewTokenizer creates a new tokenizer from an input stream.
+func NewTokenizer(r io.Reader) *Tokenizer {
+ input := bufio.NewReader(r)
+ classifier := newDefaultClassifier()
+ return &Tokenizer{
+ input: *input,
+ classifier: classifier}
+}
+
+// scanStream scans the stream for the next token using the internal state machine.
+// It will panic if it encounters a rune which it does not know how to handle.
+func (t *Tokenizer) scanStream() (*Token, error) {
+ state := startState
+ var tokenType TokenType
+ var value []rune
+ var nextRune rune
+ var nextRuneType runeTokenClass
+ var err error
+
+ for {
+ nextRune, _, err = t.input.ReadRune()
+ nextRuneType = t.classifier.ClassifyRune(nextRune)
+
+ if err == io.EOF {
+ nextRuneType = eofRuneClass
+ err = nil
+ } else if err != nil {
+ return nil, err
+ }
+
+ switch state {
+ case startState: // no runes read yet
+ {
+ switch nextRuneType {
+ case eofRuneClass:
+ {
+ return nil, io.EOF
+ }
+ case spaceRuneClass:
+ {
+ }
+ case escapingQuoteRuneClass:
+ {
+ tokenType = WordToken
+ state = quotingEscapingState
+ }
+ case nonEscapingQuoteRuneClass:
+ {
+ tokenType = WordToken
+ state = quotingState
+ }
+ case escapeRuneClass:
+ {
+ tokenType = WordToken
+ state = escapingState
+ }
+ case commentRuneClass:
+ {
+ tokenType = CommentToken
+ state = commentState
+ }
+ default:
+ {
+ tokenType = WordToken
+ value = append(value, nextRune)
+ state = inWordState
+ }
+ }
+ }
+ case inWordState: // in a regular word
+ {
+ switch nextRuneType {
+ case eofRuneClass:
+ {
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ }
+ case spaceRuneClass:
+ {
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ }
+ case escapingQuoteRuneClass:
+ {
+ state = quotingEscapingState
+ }
+ case nonEscapingQuoteRuneClass:
+ {
+ state = quotingState
+ }
+ case escapeRuneClass:
+ {
+ state = escapingState
+ }
+ default:
+ {
+ value = append(value, nextRune)
+ }
+ }
+ }
+ case escapingState: // the rune after an escape character
+ {
+ switch nextRuneType {
+ case eofRuneClass:
+ {
+ err = fmt.Errorf("EOF found after escape character")
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ }
+ default:
+ {
+ state = inWordState
+ value = append(value, nextRune)
+ }
+ }
+ }
+ case escapingQuotedState: // the next rune after an escape character, in double quotes
+ {
+ switch nextRuneType {
+ case eofRuneClass:
+ {
+ err = fmt.Errorf("EOF found after escape character")
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ }
+ default:
+ {
+ state = quotingEscapingState
+ value = append(value, nextRune)
+ }
+ }
+ }
+ case quotingEscapingState: // in escaping double quotes
+ {
+ switch nextRuneType {
+ case eofRuneClass:
+ {
+ err = fmt.Errorf("EOF found when expecting closing quote")
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ }
+ case escapingQuoteRuneClass:
+ {
+ state = inWordState
+ }
+ case escapeRuneClass:
+ {
+ state = escapingQuotedState
+ }
+ default:
+ {
+ value = append(value, nextRune)
+ }
+ }
+ }
+ case quotingState: // in non-escaping single quotes
+ {
+ switch nextRuneType {
+ case eofRuneClass:
+ {
+ err = fmt.Errorf("EOF found when expecting closing quote")
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ }
+ case nonEscapingQuoteRuneClass:
+ {
+ state = inWordState
+ }
+ default:
+ {
+ value = append(value, nextRune)
+ }
+ }
+ }
+ case commentState: // in a comment
+ {
+ switch nextRuneType {
+ case eofRuneClass:
+ {
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ }
+ case spaceRuneClass:
+ {
+ if nextRune == '\n' {
+ state = startState
+ token := &Token{
+ tokenType: tokenType,
+ value: string(value)}
+ return token, err
+ } else {
+ value = append(value, nextRune)
+ }
+ }
+ default:
+ {
+ value = append(value, nextRune)
+ }
+ }
+ }
+ default:
+ {
+ return nil, fmt.Errorf("Unexpected state: %v", state)
+ }
+ }
+ }
+}
+
+// Next returns the next token in the stream.
+func (t *Tokenizer) Next() (*Token, error) {
+ return t.scanStream()
+}
+
+// Split partitions a string into a slice of strings.
+func Split(s string) ([]string, error) {
+ l := NewLexer(strings.NewReader(s))
+ subStrings := make([]string, 0)
+ for {
+ word, err := l.Next()
+ if err != nil {
+ if err == io.EOF {
+ return subStrings, nil
+ }
+ return subStrings, err
+ }
+ subStrings = append(subStrings, word)
+ }
+}