Function existHunkHeader

src/diff-parser.ts:238–258

(line: string, lineIdx: number)

   * Hunk header is a group of three lines started by ( `--- ` , `+++ ` , `@@` )
   */
  function existHunkHeader(line: string, lineIdx: number): boolean {
    let idx = lineIdx;

    while (idx < diffLines.length - 3) {
      if (line.startsWith('diff')) {
        return false;
      }

      if (
        diffLines[idx].startsWith(oldFileNameHeader) &&
        diffLines[idx + 1].startsWith(newFileNameHeader) &&
        diffLines[idx + 2].startsWith(hunkHeaderPrefix)
      ) {
        return true;
      }

      idx++;
    }

    return false;
  }

  diffLines.forEach((line, lineIndex) => {
    // Unmerged paths, and possibly other non-diffable files