Function parse

src/diff-parser.ts:55–481

(diffInput: string, config: DiffParserConfig = {})

 *
 */
export function parse(diffInput: string, config: DiffParserConfig = {}): DiffFile[] {
  const files: DiffFile[] = [];
  let currentFile: DiffFile | null = null;
  let currentBlock: DiffBlock | null = null;
  let oldLine: number | null = null;
  let oldLine2: number | null = null; // Used for combined diff
  let newLine: number | null = null;

  let possibleOldName: string | null = null;
  let possibleNewName: string | null = null;

  /* Diff Header */
  const oldFileNameHeader = '--- ';
  const newFileNameHeader = '+++ ';
  const hunkHeaderPrefix = '@@';

  /* Diff */
  const oldMode = /^old mode (\d{6})/;
  const newMode = /^new mode (\d{6})/;
  const deletedFileMode = /^deleted file mode (\d{6})/;
  const newFileMode = /^new file mode (\d{6})/;

  const copyFrom = /^copy from "?(.+)"?/;
  const copyTo = /^copy to "?(.+)"?/;

  const renameFrom = /^rename from "?(.+)"?/;
  const renameTo = /^rename to "?(.+)"?/;

  const similarityIndex = /^similarity index (\d+)%/;
  const dissimilarityIndex = /^dissimilarity index (\d+)%/;
  const index = /^index ([\da-z]+)\.\.([\da-z]+)\s*(\d{6})?/;

  const binaryFiles = /^Binary files (.*) and (.*) differ/;
  const binaryDiff = /^GIT binary patch/;

  /* Combined Diff */
  const combinedIndex = /^index ([\da-z]+),([\da-z]+)\.\.([\da-z]+)/;
  const combinedMode = /^mode (\d{6}),(\d{6})\.\.(\d{6})/;
  const combinedNewFile = /^new file mode (\d{6})/;
  const combinedDeletedFile = /^deleted file mode (\d{6}),(\d{6})/;

  const diffLines = diffInput
    .replace(/\\ No newline at end of file/g, '')
    .replace(/\r\n?/g, '\n')
    .split('\n');

  /* Add previous block(if exists) before start a new file */
  function saveBlock(): void {
    if (currentBlock !== null && currentFile !== null) {
      currentFile.blocks.push(currentBlock);
      currentBlock = null;
    }
  }

  /*
   * Add previous file(if exists) before start a new one
   * if it has name (to avoid binary files errors)
   */