Use compose-spec parser

Signed-off-by: CrazyMax <crazy-max@users.noreply.github.com>

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

@@ -0,0 +1,16 @@
+arch:
+  - amd64
+  - ppc64le
+language: go
+sudo: false
+go:
+  - tip
+
+before_install:
+  - go get -t -v ./...
+
+script:
+  - ./go.test.sh
+
+after_success:
+  - bash <(curl -s https://codecov.io/bash)

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

@@ -0,0 +1,21 @@
+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

@@ -0,0 +1,55 @@
+# 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)
+[![PkgGoDev](https://pkg.go.dev/badge/github.com/mattn/go-shellwords)](https://pkg.go.dev/github.com/mattn/go-shellwords)
+[![ci](https://github.com/mattn/go-shellwords/ci/badge.svg)](https://github.com/mattn/go-shellwords/actions)
+
+Parse line as shell words.
+
+## Usage
+
+```go
+args, err := shellwords.Parse("./foo --bar=baz")
+// args should be ["./foo", "--bar=baz"]
+```
+
+```go
+envs, args, err := shellwords.ParseWithEnvs("FOO=foo BAR=baz ./foo --bar=baz")
+// envs should be ["FOO=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

@@ -0,0 +1,3 @@
+module github.com/mattn/go-shellwords
+
+go 1.13

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

@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+
+set -e
+echo "" > coverage.txt
+
+for d in $(go list ./... | grep -v vendor); do
+    go test -coverprofile=profile.out -covermode=atomic "$d"
+    if [ -f profile.out ]; then
+        cat profile.out >> coverage.txt
+        rm profile.out
+    fi
+done

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

@@ -0,0 +1,317 @@
+package shellwords
+
+import (
+	"bytes"
+	"errors"
+	"os"
+	"strings"
+	"unicode"
+)
+
+var (
+	ParseEnv      bool = false
+	ParseBacktick bool = false
+)
+
+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
+	}
+
+	var buf bytes.Buffer
+	rs := []rune(s)
+	for i := 0; i < len(rs); i++ {
+		r := rs[i]
+		if r == '\\' {
+			i++
+			if i == len(rs) {
+				break
+			}
+			buf.WriteRune(rs[i])
+			continue
+		} else if r == '$' {
+			i++
+			if i == len(rs) {
+				buf.WriteRune(r)
+				break
+			}
+			if rs[i] == 0x7b {
+				i++
+				p := i
+				for ; i < len(rs); i++ {
+					r = rs[i]
+					if r == '\\' {
+						i++
+						if i == len(rs) {
+							return s
+						}
+						continue
+					}
+					if r == 0x7d || (!unicode.IsLetter(r) && r != '_' && !unicode.IsDigit(r)) {
+						break
+					}
+				}
+				if r != 0x7d {
+					return s
+				}
+				if i > p {
+					buf.WriteString(getenv(s[p:i]))
+				}
+			} else {
+				p := i
+				for ; i < len(rs); i++ {
+					r := rs[i]
+					if r == '\\' {
+						i++
+						if i == len(rs) {
+							return s
+						}
+						continue
+					}
+					if !unicode.IsLetter(r) && r != '_' && !unicode.IsDigit(r) {
+						break
+					}
+				}
+				if i > p {
+					buf.WriteString(getenv(s[p:i]))
+					i--
+				} else {
+					buf.WriteString(s[p:])
+				}
+			}
+		} else {
+			buf.WriteRune(r)
+		}
+	}
+	return buf.String()
+}
+
+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:           "",
+	}
+}
+
+type argType int
+
+const (
+	argNo argType = iota
+	argSingle
+	argQuoted
+)
+
+func (p *Parser) Parse(line string) ([]string, error) {
+	args := []string{}
+	buf := ""
+	var escaped, doubleQuoted, singleQuoted, backQuote, dollarQuote bool
+	backtick := ""
+
+	pos := -1
+	got := argNo
+
+	i := -1
+loop:
+	for _, r := range line {
+		i++
+		if escaped {
+			buf += string(r)
+			escaped = false
+			got = argSingle
+			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 != argNo {
+				if p.ParseEnv {
+					if got == argSingle {
+						parser := &Parser{ParseEnv: false, ParseBacktick: false, Position: 0, Dir: p.Dir}
+						strs, err := parser.Parse(replaceEnv(p.Getenv, buf))
+						if err != nil {
+							return nil, err
+						}
+						args = append(args, strs...)
+					} else {
+						args = append(args, replaceEnv(p.Getenv, buf))
+					}
+				} else {
+					args = append(args, buf)
+				}
+				buf = ""
+				got = argNo
+			}
+			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 {
+				if doubleQuoted {
+					got = argQuoted
+				}
+				doubleQuoted = !doubleQuoted
+				continue
+			}
+		case '\'':
+			if !doubleQuoted && !dollarQuote {
+				if singleQuoted {
+					got = argQuoted
+				}
+				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 = argNo
+					}
+				}
+				pos = i
+				break loop
+			}
+		}
+
+		got = argSingle
+		buf += string(r)
+		if backQuote || dollarQuote {
+			backtick += string(r)
+		}
+	}
+
+	if got != argNo {
+		if p.ParseEnv {
+			if got == argSingle {
+				parser := &Parser{ParseEnv: false, ParseBacktick: false, Position: 0, Dir: p.Dir}
+				strs, err := parser.Parse(replaceEnv(p.Getenv, buf))
+				if err != nil {
+					return nil, err
+				}
+				args = append(args, strs...)
+			} else {
+				args = append(args, replaceEnv(p.Getenv, buf))
+			}
+		} else {
+			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 (p *Parser) ParseWithEnvs(line string) (envs []string, args []string, err error) {
+	_args, err := p.Parse(line)
+	if err != nil {
+		return nil, nil, err
+	}
+	envs = []string{}
+	args = []string{}
+	parsingEnv := true
+	for _, arg := range _args {
+		if parsingEnv && isEnv(arg) {
+			envs = append(envs, arg)
+		} else {
+			if parsingEnv {
+				parsingEnv = false
+			}
+			args = append(args, arg)
+		}
+	}
+	return envs, args, nil
+}
+
+func isEnv(arg string) bool {
+	return len(strings.Split(arg, "=")) == 2
+}
+
+func Parse(line string) ([]string, error) {
+	return NewParser().Parse(line)
+}
+
+func ParseWithEnvs(line string) (envs []string, args []string, err error) {
+	return NewParser().ParseWithEnvs(line)
+}

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

@@ -0,0 +1,29 @@
+// +build !windows
+
+package shellwords
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func shellRun(line, dir string) (string, error) {
+	var shell string
+	if shell = os.Getenv("SHELL"); shell == "" {
+		shell = "/bin/sh"
+	}
+	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 "", fmt.Errorf("%s: %w", string(b), err)
+	}
+	return strings.TrimSpace(string(b)), nil
+}

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

@@ -0,0 +1,29 @@
+// +build windows
+
+package shellwords
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func shellRun(line, dir string) (string, error) {
+	var shell string
+	if shell = os.Getenv("COMSPEC"); shell == "" {
+		shell = "cmd"
+	}
+	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 "", fmt.Errorf("%s: %w", string(b), err)
+	}
+	return strings.TrimSpace(string(b)), nil
+}