Function checkout_paths

builtin/checkout.c:517–719

}

static int checkout_paths(const struct checkout_opts *opts,
			  const struct branch_info *new_branch_info)
{
	int pos;
	static char *ps_matched;
	struct object_id rev;
	struct commit *head;
	int errs = 0;
	struct lock_file lock_file = LOCK_INIT;
	int checkout_index;

	trace2_cmd_mode(opts->patch_mode ? "patch" : "path");

	if (opts->track != BRANCH_TRACK_UNSPECIFIED)
		die(_("'%s' cannot be used with updating paths"), "--track");

	if (opts->new_branch_log)
		die(_("'%s' cannot be used with updating paths"), "-l");

	if (opts->ignore_unmerged && opts->patch_mode)
		die(_("'%s' cannot be used with updating paths"),
		    opts->ignore_unmerged_opt);

	if (opts->force_detach)
		die(_("'%s' cannot be used with updating paths"), "--detach");

	if (opts->merge && opts->patch_mode)
		die(_("options '%s' and '%s' cannot be used together"), "--merge", "--patch");

	if (opts->ignore_unmerged && opts->merge)
		die(_("options '%s' and '%s' cannot be used together"),
		    opts->ignore_unmerged_opt, "-m");

	if (opts->new_branch)
		die(_("Cannot update paths and switch to branch '%s' at the same time."),
		    opts->new_branch);

	if (!opts->checkout_worktree && !opts->checkout_index)
		die(_("neither '%s' or '%s' is specified"),
		    "--staged", "--worktree");

	if (!opts->checkout_worktree && !opts->from_treeish)
		die(_("'%s' must be used when '%s' is not specified"),
		    "--worktree", "--source");

	/*
	 * Reject --staged option to the restore command when combined with
	 * merge-related options. Use the accept_ref flag to distinguish it
	 * from the checkout command, which does not accept --staged anyway.
	 *
	 * `restore --ours|--theirs --worktree --staged` could mean resolving
	 * conflicted paths to one side in both the worktree and the index,
	 * but does not currently.
	 *
	 * `restore --merge|--conflict=<style>` already recreates conflicts
	 * in both the worktree and the index, so adding --staged would be
	 * meaningless.
	 */