Function parsePatch

src/diff.js:557–710

(uniDiff)

  }

  function parsePatch(uniDiff) {
    var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
    var diffstr = uniDiff.split(/\r\n|[\n\v\f\r\x85]/),
        delimiters = uniDiff.match(/\r\n|[\n\v\f\r\x85]/g) || [],
        list = [],
        i = 0;

    function parseIndex() {
      var index = {};
      list.push(index); // Parse diff metadata

      while (i < diffstr.length) {
        var line = diffstr[i]; // File header found, end parsing diff metadata

        if (/^(\-\-\-|\+\+\+|@@)\s/.test(line)) {
          break;
        } // Diff index


        var header = /^(?:Index:|diff(?: -r \w+)+)\s+(.+?)\s*$/.exec(line);

        if (header) {
          index.index = header[1];
        }

        i++;
      } // Parse file headers if they are defined. Unified diff requires them, but
      // there's no technical issues to have an isolated hunk without file header


      parseFileHeader(index);
      parseFileHeader(index); // Parse hunks

      index.hunks = [];

      while (i < diffstr.length) {
        var _line = diffstr[i];

        if (/^(Index:|diff|\-\-\-|\+\+\+)\s/.test(_line)) {
          break;
        } else if (/^@@/.test(_line)) {
          index.hunks.push(parseHunk());
        } else if (_line && options.strict) {
          // Ignore unexpected content unless in strict mode
          throw new Error('Unknown line ' + (i + 1) + ' ' + JSON.stringify(_line));
        } else {
          i++;
        }
      }
    } // Parses the --- and +++ headers, if none are found, no lines
    // are consumed.


    function parseFileHeader(index) {
      var fileHeader = /^(---|\+\+\+)\s+(.*)$/.exec(diffstr[i]);

      if (fileHeader) {
        var keyPrefix = fileHeader[1] === '---' ? 'old' : 'new';