Function Output

subprocess/subprocess.go:92–114

(cmd *Cmd)

}

func Output(cmd *Cmd) (string, error) {
	out, err := cmd.Output()

	if exitError, ok := err.(*exec.ExitError); ok {
		errorOutput := strings.TrimSpace(string(exitError.Stderr))
		if errorOutput == "" {
			// some commands might write nothing to stderr but something to stdout in error-conditions, in which case, we'll use that
			// in the error string
			errorOutput = strings.TrimSpace(string(out))
		}

		ran := cmd.Path
		if len(cmd.Args) > 1 {
			ran = fmt.Sprintf("%s %s", cmd.Path, quotedArgs(cmd.Args[1:]))
		}
		formattedErr := errors.New(tr.Tr.Get("error running %s: '%s' '%s'", ran, errorOutput, strings.TrimSpace(exitError.Error())))

		// return "" as output in error case, for callers that don't care about errors but rely on "" returned, in-case stdout != ""
		return "", formattedErr
	}

	return strings.Trim(string(out), " \n"), err
}

var shellWordRe = regexp.MustCompile(`\A[A-Za-z0-9_@/.-]+\z`)