Vendor main dependencies.

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

@@ -0,0 +1,134 @@
+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(s string) string {
+	return envRe.ReplaceAllStringFunc(s, func(s string) string {
+		s = s[1:]
+		if s[0] == '{' {
+			s = s[1 : len(s)-1]
+		}
+		return os.Getenv(s)
+	})
+}
+
+type Parser struct {
+	ParseEnv      bool
+	ParseBacktick bool
+}
+
+func NewParser() *Parser {
+	return &Parser{ParseEnv, ParseBacktick}
+}
+
+func (p *Parser) Parse(line string) ([]string, error) {
+	line = strings.TrimSpace(line)
+
+	args := []string{}
+	buf := ""
+	var escaped, doubleQuoted, singleQuoted, backQuote bool
+	backtick := ""
+
+	for _, 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 {
+				buf += string(r)
+				backtick += string(r)
+			} else if buf != "" {
+				if p.ParseEnv {
+					buf = replaceEnv(buf)
+				}
+				args = append(args, buf)
+				buf = ""
+			}
+			continue
+		}
+
+		switch r {
+		case '`':
+			if !singleQuoted && !doubleQuoted {
+				if p.ParseBacktick {
+					if backQuote {
+						out, err := shellRun(backtick)
+						if err != nil {
+							return nil, err
+						}
+						buf = out
+					}
+					backtick = ""
+					backQuote = !backQuote
+					continue
+				}
+				backtick = ""
+				backQuote = !backQuote
+			}
+		case '"':
+			if !singleQuoted {
+				doubleQuoted = !doubleQuoted
+				continue
+			}
+		case '\'':
+			if !doubleQuoted {
+				singleQuoted = !singleQuoted
+				continue
+			}
+		}
+
+		buf += string(r)
+		if backQuote {
+			backtick += string(r)
+		}
+	}
+
+	if buf != "" {
+		if p.ParseEnv {
+			buf = replaceEnv(buf)
+		}
+		args = append(args, buf)
+	}
+
+	if escaped || singleQuoted || doubleQuoted || backQuote {
+		return nil, errors.New("invalid command line string")
+	}
+
+	return args, nil
+}
+
+func Parse(line string) ([]string, error) {
+	return NewParser().Parse(line)
+}

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

@@ -0,0 +1,19 @@
+// +build !windows
+
+package shellwords
+
+import (
+	"errors"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func shellRun(line string) (string, error) {
+	shell := os.Getenv("SHELL")
+	b, err := exec.Command(shell, "-c", line).Output()
+	if err != nil {
+		return "", errors.New(err.Error() + ":" + string(b))
+	}
+	return strings.TrimSpace(string(b)), nil
+}

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

@@ -0,0 +1,17 @@
+package shellwords
+
+import (
+	"errors"
+	"os"
+	"os/exec"
+	"strings"
+)
+
+func shellRun(line string) (string, error) {
+	shell := os.Getenv("COMSPEC")
+	b, err := exec.Command(shell, "/c", line).Output()
+	if err != nil {
+		return "", errors.New(err.Error() + ":" + string(b))
+	}
+	return strings.TrimSpace(string(b)), nil
+}