Replace mattn/go-shellwords with google/shlex

Both libaries provide similar functionality. We're currently using
Google Shlex in more places, so prefering that one for now, but we
could decide to switch to mattn/go-shellwords in future if that
library is considered better (it looks to be more actively maintained,
but that may be related to it providing "more features").

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

cli/compose/loader/loader.go

@@ -17,7 +17,7 @@ import (
 	"github.com/docker/docker/api/types/versions"
 	"github.com/docker/go-connections/nat"
 	units "github.com/docker/go-units"
-	shellwords "github.com/mattn/go-shellwords"
+	"github.com/google/shlex"
 	"github.com/mitchellh/mapstructure"
 	"github.com/pkg/errors"
 	"github.com/sirupsen/logrus"
@@ -853,7 +853,7 @@ func transformMappingOrList(mappingOrList interface{}, sep string, allowNil bool
 
 var transformShellCommand TransformerFunc = func(value interface{}) (interface{}, error) {
 	if str, ok := value.(string); ok {
-		return shellwords.Parse(str)
+		return shlex.Split(str)
 	}
 	return value, nil
 }

vendor.conf

@@ -39,7 +39,6 @@ github.com/inconshreveable/mousetrap                76626ae9c91c4f2a10f34cad8ce8
 github.com/jaguilar/vt100                           ad4c4a5743050fb7f88ce968dca9422f72a0e3f2 git://github.com/tonistiigi/vt100.git
 github.com/json-iterator/go                         0ff49de124c6f76f8494e194af75bde0f1a49a29 # 1.1.6
 github.com/konsorten/go-windows-terminal-sequences  edb144dfd453055e1e49a3d8b410a660b5a87613 # v1.0.3
-github.com/mattn/go-shellwords                      36a9b3c57cb5caa559ff63fb7e9b585f1c00df75 # v1.0.6
 github.com/matttproud/golang_protobuf_extensions    c12348ce28de40eed0136aa2b644d0ee0650e56c # v1.0.1
 github.com/Microsoft/go-winio                       6c72808b55902eae4c5943626030429ff20f3b63 # v0.4.14
 github.com/Microsoft/hcsshim                        5bc557dd210ff2caf615e6e22d398123de77fc11 # v0.8.9

vendor/github.com/mattn/go-shellwords/LICENSE

@@ -1,21 +0,0 @@
-The MIT License (MIT)
-
-Copyright (c) 2017 Yasuhiro Matsumoto
-
-Permission is hereby granted, free of charge, to any person obtaining a copy
-of this software and associated documentation files (the "Software"), to deal
-in the Software without restriction, including without limitation the rights
-to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-copies of the Software, and to permit persons to whom the Software is
-furnished to do so, subject to the following conditions:
-
-The above copyright notice and this permission notice shall be included in all
-copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
-SOFTWARE.

vendor/github.com/mattn/go-shellwords/README.md

@@ -1,47 +0,0 @@
-# go-shellwords
-
-[![codecov](https://codecov.io/gh/mattn/go-shellwords/branch/master/graph/badge.svg)](https://codecov.io/gh/mattn/go-shellwords)
-[![Build Status](https://travis-ci.org/mattn/go-shellwords.svg?branch=master)](https://travis-ci.org/mattn/go-shellwords)
-
-Parse line as shell words.
-
-## Usage
-
-```go
-args, err := shellwords.Parse("./foo --bar=baz")
-// args should be ["./foo", "--bar=baz"]
-```
-
-```go
-os.Setenv("FOO", "bar")
-p := shellwords.NewParser()
-p.ParseEnv = true
-args, err := p.Parse("./foo $FOO")
-// args should be ["./foo", "bar"]
-```
-
-```go
-p := shellwords.NewParser()
-p.ParseBacktick = true
-args, err := p.Parse("./foo `echo $SHELL`")
-// args should be ["./foo", "/bin/bash"]
-```
-
-```go
-shellwords.ParseBacktick = true
-p := shellwords.NewParser()
-args, err := p.Parse("./foo `echo $SHELL`")
-// args should be ["./foo", "/bin/bash"]
-```
-
-# Thanks
-
-This is based on cpan module [Parse::CommandLine](https://metacpan.org/pod/Parse::CommandLine).
-
-# License
-
-under the MIT License: http://mattn.mit-license.org/2017
-
-# Author
-
-Yasuhiro Matsumoto (a.k.a mattn)

vendor/github.com/mattn/go-shellwords/go.mod

@@ -1 +0,0 @@
-module github.com/mattn/go-shellwords

vendor/github.com/mattn/go-shellwords/shellwords.go

@@ -1,193 +0,0 @@
-package shellwords
-
-import (
-	"errors"
-	"os"
-	"regexp"
-	"strings"
-)
-
-var (
-	ParseEnv      bool = false
-	ParseBacktick bool = false
-)
-
-var envRe = regexp.MustCompile(`\$({[a-zA-Z0-9_]+}|[a-zA-Z0-9_]+)`)
-
-func isSpace(r rune) bool {
-	switch r {
-	case ' ', '\t', '\r', '\n':
-		return true
-	}
-	return false
-}
-
-func replaceEnv(getenv func(string) string, s string) string {
-	if getenv == nil {
-		getenv = os.Getenv
-	}
-
-	return envRe.ReplaceAllStringFunc(s, func(s string) string {
-		s = s[1:]
-		if s[0] == '{' {
-			s = s[1 : len(s)-1]
-		}
-		return getenv(s)
-	})
-}
-
-type Parser struct {
-	ParseEnv      bool
-	ParseBacktick bool
-	Position      int
-	Dir           string
-
-	// If ParseEnv is true, use this for getenv.
-	// If nil, use os.Getenv.
-	Getenv func(string) string
-}
-
-func NewParser() *Parser {
-	return &Parser{
-		ParseEnv:      ParseEnv,
-		ParseBacktick: ParseBacktick,
-		Position:      0,
-		Dir:           "",
-	}
-}
-
-func (p *Parser) Parse(line string) ([]string, error) {
-	args := []string{}
-	buf := ""
-	var escaped, doubleQuoted, singleQuoted, backQuote, dollarQuote bool
-	backtick := ""
-
-	pos := -1
-	got := false
-
-loop:
-	for i, r := range line {
-		if escaped {
-			buf += string(r)
-			escaped = false
-			continue
-		}
-
-		if r == '\\' {
-			if singleQuoted {
-				buf += string(r)
-			} else {
-				escaped = true
-			}
-			continue
-		}
-
-		if isSpace(r) {
-			if singleQuoted || doubleQuoted || backQuote || dollarQuote {
-				buf += string(r)
-				backtick += string(r)
-			} else if got {
-				if p.ParseEnv {
-					buf = replaceEnv(p.Getenv, buf)
-				}
-				args = append(args, buf)
-				buf = ""
-				got = false
-			}
-			continue
-		}
-
-		switch r {
-		case '`':
-			if !singleQuoted && !doubleQuoted && !dollarQuote {
-				if p.ParseBacktick {
-					if backQuote {
-						out, err := shellRun(backtick, p.Dir)
-						if err != nil {
-							return nil, err
-						}
-						buf = buf[:len(buf)-len(backtick)] + out
-					}
-					backtick = ""
-					backQuote = !backQuote
-					continue
-				}
-				backtick = ""
-				backQuote = !backQuote
-			}
-		case ')':
-			if !singleQuoted && !doubleQuoted && !backQuote {
-				if p.ParseBacktick {
-					if dollarQuote {
-						out, err := shellRun(backtick, p.Dir)
-						if err != nil {
-							return nil, err
-						}
-						buf = buf[:len(buf)-len(backtick)-2] + out
-					}
-					backtick = ""
-					dollarQuote = !dollarQuote
-					continue
-				}
-				backtick = ""
-				dollarQuote = !dollarQuote
-			}
-		case '(':
-			if !singleQuoted && !doubleQuoted && !backQuote {
-				if !dollarQuote && strings.HasSuffix(buf, "$") {
-					dollarQuote = true
-					buf += "("
-					continue
-				} else {
-					return nil, errors.New("invalid command line string")
-				}
-			}
-		case '"':
-			if !singleQuoted && !dollarQuote {
-				doubleQuoted = !doubleQuoted
-				continue
-			}
-		case '\'':
-			if !doubleQuoted && !dollarQuote {
-				singleQuoted = !singleQuoted
-				continue
-			}
-		case ';', '&', '|', '<', '>':
-			if !(escaped || singleQuoted || doubleQuoted || backQuote || dollarQuote) {
-				if r == '>' && len(buf) > 0 {
-					if c := buf[0]; '0' <= c && c <= '9' {
-						i -= 1
-						got = false
-					}
-				}
-				pos = i
-				break loop
-			}
-		}
-
-		got = true
-		buf += string(r)
-		if backQuote || dollarQuote {
-			backtick += string(r)
-		}
-	}
-
-	if got {
-		if p.ParseEnv {
-			buf = replaceEnv(p.Getenv, buf)
-		}
-		args = append(args, buf)
-	}
-
-	if escaped || singleQuoted || doubleQuoted || backQuote || dollarQuote {
-		return nil, errors.New("invalid command line string")
-	}
-
-	p.Position = pos
-
-	return args, nil
-}
-
-func Parse(line string) ([]string, error) {
-	return NewParser().Parse(line)
-}

vendor/github.com/mattn/go-shellwords/util_go15.go

@@ -1,29 +0,0 @@
-// +build !go1.6
-
-package shellwords
-
-import (
-	"os"
-	"os/exec"
-	"runtime"
-	"strings"
-)
-
-func shellRun(line, dir string) (string, error) {
-	var b []byte
-	var err error
-	var cmd *exec.Cmd
-	if runtime.GOOS == "windows" {
-		cmd = exec.Command(os.Getenv("COMSPEC"), "/c", line)
-	} else {
-		cmd = exec.Command(os.Getenv("SHELL"), "-c", line)
-	}
-	if dir != "" {
-		cmd.Dir = dir
-	}
-	b, err = cmd.Output()
-	if err != nil {
-		return "", err
-	}
-	return strings.TrimSpace(string(b)), nil
-}

vendor/github.com/mattn/go-shellwords/util_posix.go

@@ -1,26 +0,0 @@
-// +build !windows,go1.6
-
-package shellwords
-
-import (
-	"errors"
-	"os"
-	"os/exec"
-	"strings"
-)
-
-func shellRun(line, dir string) (string, error) {
-	shell := os.Getenv("SHELL")
-	cmd := exec.Command(shell, "-c", line)
-	if dir != "" {
-		cmd.Dir = dir
-	}
-	b, err := cmd.Output()
-	if err != nil {
-		if eerr, ok := err.(*exec.ExitError); ok {
-			b = eerr.Stderr
-		}
-		return "", errors.New(err.Error() + ":" + string(b))
-	}
-	return strings.TrimSpace(string(b)), nil
-}

vendor/github.com/mattn/go-shellwords/util_windows.go

@@ -1,26 +0,0 @@
-// +build windows,go1.6
-
-package shellwords
-
-import (
-	"errors"
-	"os"
-	"os/exec"
-	"strings"
-)
-
-func shellRun(line, dir string) (string, error) {
-	shell := os.Getenv("COMSPEC")
-	cmd := exec.Command(shell, "/c", line)
-	if dir != "" {
-		cmd.Dir = dir
-	}
-	b, err := cmd.Output()
-	if err != nil {
-		if eerr, ok := err.(*exec.ExitError); ok {
-			b = eerr.Stderr
-		}
-		return "", errors.New(err.Error() + ":" + string(b))
-	}
-	return strings.TrimSpace(string(b)), nil
-}