Method parse

app/src/lib/diff-parser.ts:399–460

* Parse a well-formed unified diff into hunks and lines. * * @param text A unified diff produced by git diff, git log --patch * or any other git plumbing command that produces unified * diffs.

(text: string)

   *             diffs.
   */
  public parse(text: string): IRawDiff {
    this.text = text

    try {
      const headerInfo = this.parseDiffHeader()

      const headerEnd = this.le
      const header = this.text.substring(0, headerEnd)

      // empty diff
      if (!headerInfo) {
        return {
          header,
          contents: '',
          hunks: [],
          isBinary: false,
          maxLineNumber: 0,
          hasHiddenBidiChars: false,
        }
      }

      if (headerInfo.isBinary) {
        return {
          header,
          contents: '',
          hunks: [],
          isBinary: true,
          maxLineNumber: 0,
          hasHiddenBidiChars: false,
        }
      }

      const hunks = new Array<DiffHunk>()
      let linesConsumed = 0
      let previousHunk: DiffHunk | null = null

      do {
        const hunk = this.parseHunk(linesConsumed, hunks.length, previousHunk)
        hunks.push(hunk)
        previousHunk = hunk
        linesConsumed += hunk.lines.length
      } while (this.peek())

      const contents = this.text
        .substring(headerEnd + 1, this.le)
        // Note that this simply returns a reference to the
        // substring if no match is found, it does not create
        // a new string instance.
        .replace(/\n\\ No newline at end of file/g, '')

      return {
        header,
        contents,
        hunks,
        isBinary: headerInfo.isBinary,
        maxLineNumber: getLargestLineNumber(hunks),
        hasHiddenBidiChars: HiddenBidiCharsRegex.test(text),
      }