Class GitRebaseParser

app/src/lib/git/rebase.ts:284–316

* A parser to read and emit rebase progress from Git `stderr`

 * A parser to read and emit rebase progress from Git `stderr`
 */
class GitRebaseParser {
  public constructor(private readonly commits: ReadonlyArray<CommitOneLine>) {}

  public parse(line: string): IMultiCommitOperationProgress | null {
    const match = rebasingRe.exec(line)
    if (match === null || match.length !== 3) {
      // Git will sometimes emit other output (for example, when it tries to
      // resolve conflicts) and this does not match the expected output
      return null
    }

    const rebasedCommitCount = parseInt(match[1], 10)
    const totalCommitCount = parseInt(match[2], 10)

    if (isNaN(rebasedCommitCount) || isNaN(totalCommitCount)) {
      return null
    }

    const currentCommitSummary =
      this.commits[rebasedCommitCount - 1]?.summary ?? ''

    const progress = rebasedCommitCount / totalCommitCount
    const value = formatRebaseValue(progress)

    return {
      kind: 'multiCommitOperation',
      value,
      position: rebasedCommitCount,
      totalCommitCount: totalCommitCount,
      currentCommitSummary,
    }
  }
}

function configureOptionsForRebase<T extends IGitExecutionOptions>(
  options: T,