Method getWorktree

repository/git.go:165–202

getWorktree gets or recreates a worktree for an existing environment. It assumes the environment branch already exists in the forkRepo and will fail if it doesn't.

(ctx context.Context, id string)

// getWorktree gets or recreates a worktree for an existing environment.
// It assumes the environment branch already exists in the forkRepo and will fail if it doesn't.
func (r *Repository) getWorktree(ctx context.Context, id string) (string, error) {
	worktreePath, err := r.WorktreePath(id)
	if err != nil {
		return "", err
	}

	// Early return if the worktree already exists
	if _, err := os.Stat(worktreePath); err == nil {
		return worktreePath, nil
	}

	slog.Info("Recreating worktree for existing environment", "repository", r.userRepoPath, "environment-id", id)

	return worktreePath, r.lockManager.WithLock(ctx, LockTypeForkRepo, func() error {
		// In case something has changed while waiting for lock. prolly too defensive.
		if _, err := os.Stat(worktreePath); err == nil {
			return nil
		}

		// Verify the environment branch exists in forkRepo before creating worktree
		_, err := RunGitCommand(ctx, r.forkRepoPath, "rev-parse", "--verify", id)
		if err != nil {
			return fmt.Errorf("environment branch %s not found in fork repository: %w", id, err)
		}

		_, err = RunGitCommand(ctx, r.forkRepoPath, "worktree", "add", worktreePath, id)
		if err != nil {
			return err
		}

		_, err = RunGitCommand(ctx, r.userRepoPath, "fetch", containerUseRemote, id)
		if err != nil {
			return err
		}

		return nil
	})
}

// createInitialCommit creates an empty commit with the environment creation message - this prevents multiple environments from overwriting the container-use-state on the parent commit
func (r *Repository) createInitialCommit(ctx context.Context, worktreePath, id, title string) error {