Function handleRewindFiles

src/cli/print.ts:4749–4801

(
  userMessageId: UUID,
  appState: AppState,
  setAppState: (updater: (prev: AppState) => AppState) => void,
  dryRun: boolean,
)

}

async function handleRewindFiles(
  userMessageId: UUID,
  appState: AppState,
  setAppState: (updater: (prev: AppState) => AppState) => void,
  dryRun: boolean,
): Promise<RewindFilesResult> {
  if (!fileHistoryEnabled()) {
    return {
      canRewind: false,
      error: 'File rewinding is not enabled.',
      filesChanged: [],
    }
  }
  if (!fileHistoryCanRestore(appState.fileHistory, userMessageId)) {
    return {
      canRewind: false,
      error: 'No file checkpoint found for this message.',
      filesChanged: [],
    }
  }

  if (dryRun) {
    const diffStats = await fileHistoryGetDiffStats(
      appState.fileHistory,
      userMessageId,
    )
    return {
      canRewind: true,
      filesChanged: diffStats?.filesChanged ?? [],
      insertions: diffStats?.insertions,
      deletions: diffStats?.deletions,
    }
  }

  try {
    await fileHistoryRewind(
      updater =>
        setAppState(prev => ({
          ...prev,
          fileHistory: updater(prev.fileHistory),
        })),
      userMessageId,
    )
  } catch (error) {
    return {
      canRewind: false,
      error: `Failed to rewind: ${errorMessage(error)}`,
      filesChanged: [],
    }
  }

  return { canRewind: true, filesChanged: [] }
}

function handleSetPermissionMode(
  request: { mode: InternalPermissionMode },