releaseBackup method

@visibleForTesting Future<void> releaseBackup(String? backup, { required bool succeeded, })

Rolls the repository back to backup unless the hook succeeded, then releases the snapshot.

The ref is deliberately left in place when a restore fails -- that is the one case where the user's only remaining copy of their work is the snapshot itself.

Implementation

@visibleForTesting
Future<void> releaseBackup(String? backup, {required bool succeeded}) async {
  if (backup == null) return;

  if (succeeded) {
    await git.dropBackup();
    return;
  }

  logger.detail('Hook did not succeed, restoring $backup');

  if (await git.restoreBackup(backup)) {
    logger.detail('Restored the index and working tree');
    await git.dropBackup();
    return;
  }

  logger.err(
    'Failed to restore your files after the hook did not succeed.\n'
    'Your work is safe in a backup. Recover it by running:\n'
    '  git stash apply ${GitService.backupRef}',
  );
}