Function check_clean_worktree

builtin/worktree.c:1325–1362

* Note, "git status --porcelain" is used to determine if it's safe to * delete a whole worktree. "git status" does not ignore user * configuration, so if a normal "git status" shows "clean" for the * user, then it's ok to remove it. * * This assumption may be a bad one. We may want to ignore * (potentially bad) user settings and only delete a worktree when * it's absolutely safe to do so fr

 * know better.
 */
static void check_clean_worktree(struct worktree *wt,
				 const char *original_path)
{
	struct child_process cp;
	char buf[1];
	int ret;

	/*
	 * Until we sort this out, all submodules are "dirty" and
	 * will abort this function.
	 */
	validate_no_submodules(wt);

	child_process_init(&cp);
	strvec_pushf(&cp.env, "%s=%s/.git",
		     GIT_DIR_ENVIRONMENT, wt->path);
	strvec_pushf(&cp.env, "%s=%s",
		     GIT_WORK_TREE_ENVIRONMENT, wt->path);
	strvec_pushl(&cp.args, "status",
		     "--porcelain", "--ignore-submodules=none",
		     NULL);
	cp.git_cmd = 1;
	cp.dir = wt->path;
	cp.out = -1;
	ret = start_command(&cp);
	if (ret)
		die_errno(_("failed to run 'git status' on '%s'"),
			  original_path);
	ret = xread(cp.out, buf, sizeof(buf));
	if (ret)
		die(_("'%s' contains modified or untracked files, use --force to delete it"),
		    original_path);
	close(cp.out);
	ret = finish_command(&cp);
	if (ret)
		die_errno(_("failed to run 'git status' on '%s', code %d"),
			  original_path, ret);
}

static int delete_git_work_tree(struct worktree *wt)
{