text: /**
   * @file get change log file
   **/
  
  const fs = require('fs');
  
  module.exports = function getChangelog(file, version) {
      const lines = fs
          .readFileSync(file)
          .toString()
          .split('\n');
      const changeLog = [];
      const startPattern = new RegExp(`^## ${version}`);
      const stopPattern = /^## /; // 前一个版本
      const skipPattern = /^`/; // 日期
      let begin = false;
      for (let i = 0; i < lines.length; i += 1) {
          const line = lines[i];
          if (begin && stopPattern.test(line)) {
              break;
          }
          if (begin && line && !skipPattern.test(line)) {
              changeLog.push(line);
          }
          if (!begin) {
              begin = startPattern.test(line);
          }
      }
      return changeLog.join('\n');
  };
  