Function formatPatch

src/diff.js:1055–1084

(diff)

    };
  }
  function formatPatch(diff) {
    var ret = [];

    if (diff.oldFileName == diff.newFileName) {
      ret.push('Index: ' + diff.oldFileName);
    }

    ret.push('===================================================================');
    ret.push('--- ' + diff.oldFileName + (typeof diff.oldHeader === 'undefined' ? '' : '\t' + diff.oldHeader));
    ret.push('+++ ' + diff.newFileName + (typeof diff.newHeader === 'undefined' ? '' : '\t' + diff.newHeader));

    for (var i = 0; i < diff.hunks.length; i++) {
      var hunk = diff.hunks[i]; // Unified Diff Format quirk: If the chunk size is 0,
      // the first number is one lower than one would expect.
      // https://www.artima.com/weblogs/viewpost.jsp?thread=164293

      if (hunk.oldLines === 0) {
        hunk.oldStart -= 1;
      }

      if (hunk.newLines === 0) {
        hunk.newStart -= 1;
      }

      ret.push('@@ -' + hunk.oldStart + ',' + hunk.oldLines + ' +' + hunk.newStart + ',' + hunk.newLines + ' @@');
      ret.push.apply(ret, hunk.lines);
    }

    return ret.join('\n') + '\n';
  }
  function createTwoFilesPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options) {
    return formatPatch(structuredPatch(oldFileName, newFileName, oldStr, newStr, oldHeader, newHeader, options));
  }