a commit message check

pre-receive.go

package main

import (
    "fmt"
    "io/ioutil"
    "os"
    "os/exec"
    "regexp"
    "strings"
)

const CommitMessagePattern = `^(feature|fix|hotfix|other|add|change)(\(.+\))?(:|：)?( |\/).{1,80}|^(Revert |Merge branch )?(.*)`

const checkFailedMessage = `
Commit message style check failed!

Please rewrite commit message.

Example:
   feature(test) test commit style check.`

// 是否开启严格模式，严格模式下将校验所有的提交信息格式(多 commit 下)
const strictMode = true

var commitMsgReg = regexp.MustCompile(CommitMessagePattern)

func main() {

    input, _ := ioutil.ReadAll(os.Stdin)
    param := strings.Fields(string(input))

	// allow branch/tag delete
  // 在一个repo第一次提交时是没有前置提交的。所以也是空提交
	// 空提交的id是以下这个
    if param[1] == "0000000000000000000000000000000000000000" || param[0] == "0000000000000000000000000000000000000000" {
        os.Exit(0)
    }

    commitMsg := getCommitMsg(param[0], param[1])
    for _, tmpStr := range commitMsg {
        commitTypes := commitMsgReg.FindAllStringSubmatch(tmpStr, -1)

        if len(commitTypes) != 1 {
            checkFailed()
        }

        if !strictMode {
            os.Exit(0)
        }
    }

}

func getCommitMsg(odlCommitID, commitID string) []string {
    getCommitMsgCmd := exec.Command("git", "log", odlCommitID+"..."+commitID, "--pretty=format:%s")
    getCommitMsgCmd.Stdin = os.Stdin
    getCommitMsgCmd.Stderr = os.Stderr
    b, err := getCommitMsgCmd.Output()
    if err != nil {
        fmt.Print(err)
        os.Exit(1)
    }

    commitMsg := strings.Split(string(b), "\n")
    return commitMsg
}

func checkFailed() {
    fmt.Fprintln(os.Stderr, checkFailedMessage)
    os.Exit(1)
}