git hooks - commit-msg示例

git hooks - commit-msg示例代码，用于校验提交注释

#!/usr/bin/env node

/**
* Generated by ghooks. Do not edit this file.
*/
'use strict';

var fs = require('fs');
var util = require('util');
var packageObject = {};

var MAX_LENGTH = 100;
var PATTERN = /^((feature|fixbug|book)(\w*))(\s*)(.*)$/;
var IGNORED = /^Merge branch/;

try{
  packageObject = require('../../package.json').config['validate-commit-msg'];
}catch(e){}
if(packageObject && packageObject.validRegex){
  PATTERN = new RegExp(packageObject.validRegex);
}
if(packageObject && packageObject.validRegex){
  IGNORED = new RegExp(packageObject.ignoreRegex);
}

MAX_LENGTH = packageObject.maxLength || MAX_LENGTH;

var error = function() {
  // console.log('[commit-msg] process.argv:', process.argv);
  console.error('[validate-commit-msg]: ' + util.format.apply(null, arguments));
};

var validateMessage = function(message) {
  // var isValid = true;

  if (IGNORED.test(message)) {
    return true;
  }

  if (message.length > MAX_LENGTH) {
    error(packageObject.maxErrorTip || '提交注释超过最大字符数(%s)', MAX_LENGTH);
    return false;
  }

  var match = PATTERN.exec(message);

  if (!match) {
    error(packageObject.validErrorTip || '注释不符合规范' + message);
    return false;
  }

  // var type = match[1];
  // var scope = match[3];
  // var subject = match[4];

  // if (!TYPES.hasOwnProperty(type)) {
  //   error('"%s" is not allowed type !', type);
  //   return false;
  // }

  // Some more ideas, do we want anything like this ?
  // - allow only specific scopes (eg. fix(docs) should not be allowed ?
  // - auto correct the type to lower case ?
  // - auto correct first letter of the subject to lower case ?
  // - auto add empty line after subject ?
  // - auto remove empty () ?
  // - auto correct typos in type ?
  // - store incorrect messages, so that we can learn

  return true;
};

var firstLineFromBuffer = function(buffer) {
  return buffer.toString().split('\n').shift();
};

// publish for testing
exports.validateMessage = validateMessage;

var commitMsgFile = process.argv[2];
var incorrectLogFile = commitMsgFile.replace('COMMIT_EDITMSG', 'logs/incorrect-commit-msgs');

fs.readFile(
  commitMsgFile, function(err, buffer) {
    var msg = firstLineFromBuffer(buffer);

    if (!validateMessage(msg)) {
      fs.appendFile(
        incorrectLogFile, msg + '\n', function() {
          process.exit(1);
        }
      );
    } else {
      process.exit(0);
    }
  }
);