package main

import (
	"bytes"
	"fmt"
	"os"
	"os/exec"
	"regexp"
)

func fatal(err error) {
	if err == nil {
		return
	}

	fmt.Fprintf(os.Stderr, "%s\n", err.Error())
	os.Exit(-1)
}

func matchParams(re *regexp.Regexp, str string) map[string]string {
	match := re.FindStringSubmatch(str)
	if match == nil {
		return nil
	}
	params := make(map[string]string)
	for i, name := range re.SubexpNames() {
		params[name] = match[i]
	}
	return params
}

func capture3(cmd *exec.Cmd) ([]byte, []byte, error) {
	var stdout, stderr bytes.Buffer
	cmd.Stdout = &stdout
	cmd.Stderr = &stderr

	err := cmd.Run()
	return stdout.Bytes(), stderr.Bytes(), err
}

func dumpEnv(env []string) {
	for _, e := range env {
		fmt.Println(e)
	}
}