fd-gulp-jsconcat/assets/helper.js

concat js files according to those rules listed on this page(http://wd.alibaba-inc.com/doc/page/work/cbu-regulations/merge)

var constants = require('./constants');
var path = require('path');

module.exports = {
  /**
   * 获取匹配到的js文件的本地文件名
   * @param  {[type]} srcDir      源文件夹目录名
   * @param  {[type]} matchedFile 通过JS_IMPORT_RE匹配到的内容
   * @param  {[type]} file        当前正在处理的merge文件的Transform对象
   * @param  {[type]} domain      指定的url域名
   * @param  {[type]} localCommonDir      指定fdevlib/sys公共资源的目录
   * @return {[type]}             本地文件全名
   */
  getFileName: function(srcDir, matchedFile, file, domain, localCommonDir) {
    var tmpFile = matchedFile, tmpList, idx;
    if ((idx = tmpFile.indexOf('?')) !== -1) {
      tmpFile = tmpFile.substring(0, idx);
    }
    if ((idx = tmpFile.indexOf(domain)) !== -1) {
      tmpFile = tmpFile.substring(idx + domain.length);
      // app应用以"app"打头
      if (tmpFile.indexOf('app') === 0) {
        // 获取当前文件相对于分支根目录的路径
        tmpFile = tmpFile.substring(tmpFile.indexOf('/', tmpFile.indexOf('/') + 1) + 1);
        tmpFile = path.join(srcDir, tmpFile);
      } 
      // fdevlib/sys以"fdevlib"/"sys"打头
      else if (localCommonDir && tmpFile.search(/(fdevlib|sys)/) === 0) {
        tmpFile = path.join(localCommonDir, tmpFile);
      }
    } else {
      tmpFile = path.join(path.dirname(file.path), tmpFile);
    }
    return tmpFile.replace(/\\/g, '/');
  },
  /**
   * 获取domain值，用在解析merge文件中import的url
   * @param  {[type]} opt [description]
   * @return {[type]}     [description]
   */
  getDomain: function(opt) {
    var domain = 'http://style.c.aliimg.com/';
    if (opt.domain) {
      domain = opt.domain;
    }
    if (domain[domain.length - 1] !== '/') {
      domain += '/';
    }
    return domain;
  }
}