Function execFrom

tools/mage/dev.go:381–405

(
	dir string, env map[string]string, stdout, stderr io.Writer, cmd string, args ...string,
)

}

func execFrom(
	dir string, env map[string]string, stdout, stderr io.Writer, cmd string, args ...string,
) error {
	c := exec.Command(cmd, args...)
	c.Env = os.Environ()
	for k, v := range env {
		c.Env = append(c.Env, k+"="+v)
	}
	c.Dir = dir
	c.Stderr = stderr
	c.Stdout = stdout
	c.Stdin = os.Stdin
	if mg.Verbose() {
		log.Println("exec:", cmd, strings.Join(args, " "))
	}
	err := c.Run()
	if err == nil {
		return nil
	}
	ran, code := sh.CmdRan(err), sh.ExitStatus(err)
	if ran {
		return mg.Fatalf(code, `running "%s %s" failed with exit code %d`, cmd, strings.Join(args, " "), code)
	}
	return fmt.Errorf(`failed to run "%s %s: %w"`, cmd, strings.Join(args, " "), err)
}