worktree remove: new command
This command allows to delete a worktree. Like 'move' you cannot
remove the main worktree, or one with submodules inside [1].
For deleting $GIT_WORK_TREE, Untracked files or any staged entries are
considered precious and therefore prevent removal by default. Ignored
files are not precious.
When it comes to deleting $GIT_DIR, there's no "clean" check because
there should not be any valuable data in there, except:
- HEAD reflog. There is nothing we can do about this until somebody
steps up and implements the ref graveyard.
- Detached HEAD. Technically it can still be recovered. Although it
may be nice to warn about orphan commits like 'git checkout' does.
[1] We do 'git status' with --ignore-submodules=all for safety
anyway. But this needs a closer look by submodule people before we
can allow deletion. For example, if a submodule is totally clean,
but its repo not absorbed to the main .git dir, then deleting
worktree also deletes the valuable .submodule repo too.
Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 4789ceb..990e47b 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -19,6 +19,7 @@ static const char * const worktree_usage[] = {
N_("git worktree lock [<options>] <path>"),
N_("git worktree move <worktree> <new-path>"),
N_("git worktree prune [<options>]"),
+ N_("git worktree remove [<options>] <worktree>"),
N_("git worktree unlock <path>"),
NULL
};
@@ -624,7 +625,7 @@ static void validate_no_submodules(const struct worktree *wt)
discard_index(&istate);
if (found_submodules)
- die(_("working trees containing submodules cannot be moved"));
+ die(_("working trees containing submodules cannot be moved or removed"));
}
static int move_worktree(int ac, const char **av, const char *prefix)
@@ -688,6 +689,135 @@ static int move_worktree(int ac, const char **av, const char *prefix)
return 0;
}
+/*
+ * 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 from _our_ point of view because we
+ * know better.
+ */
+static void check_clean_worktree(struct worktree *wt,
+ const char *original_path)
+{
+ struct argv_array child_env = ARGV_ARRAY_INIT;
+ 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);
+
+ argv_array_pushf(&child_env, "%s=%s/.git",
+ GIT_DIR_ENVIRONMENT, wt->path);
+ argv_array_pushf(&child_env, "%s=%s",
+ GIT_WORK_TREE_ENVIRONMENT, wt->path);
+ memset(&cp, 0, sizeof(cp));
+ argv_array_pushl(&cp.args, "status",
+ "--porcelain", "--ignore-submodules=none",
+ NULL);
+ cp.env = child_env.argv;
+ 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' is dirty, 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)
+{
+ struct strbuf sb = STRBUF_INIT;
+ int ret = 0;
+
+ strbuf_addstr(&sb, wt->path);
+ if (remove_dir_recursively(&sb, 0)) {
+ error_errno(_("failed to delete '%s'"), sb.buf);
+ ret = -1;
+ }
+ strbuf_release(&sb);
+ return ret;
+}
+
+static int delete_git_dir(struct worktree *wt)
+{
+ struct strbuf sb = STRBUF_INIT;
+ int ret = 0;
+
+ strbuf_addstr(&sb, git_common_path("worktrees/%s", wt->id));
+ if (remove_dir_recursively(&sb, 0)) {
+ error_errno(_("failed to delete '%s'"), sb.buf);
+ ret = -1;
+ }
+ strbuf_release(&sb);
+ return ret;
+}
+
+static int remove_worktree(int ac, const char **av, const char *prefix)
+{
+ int force = 0;
+ struct option options[] = {
+ OPT_BOOL(0, "force", &force,
+ N_("force removing even if the worktree is dirty")),
+ OPT_END()
+ };
+ struct worktree **worktrees, *wt;
+ struct strbuf errmsg = STRBUF_INIT;
+ const char *reason;
+ int ret = 0;
+
+ ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+ if (ac != 1)
+ usage_with_options(worktree_usage, options);
+
+ worktrees = get_worktrees(0);
+ wt = find_worktree(worktrees, prefix, av[0]);
+ if (!wt)
+ die(_("'%s' is not a working tree"), av[0]);
+ if (is_main_worktree(wt))
+ die(_("'%s' is a main working tree"), av[0]);
+ reason = is_worktree_locked(wt);
+ if (reason) {
+ if (*reason)
+ die(_("cannot remove a locked working tree, lock reason: %s"),
+ reason);
+ die(_("cannot remove a locked working tree"));
+ }
+ if (validate_worktree(wt, &errmsg))
+ die(_("validation failed, cannot remove working tree: %s"),
+ errmsg.buf);
+ strbuf_release(&errmsg);
+
+ if (!force)
+ check_clean_worktree(wt, av[0]);
+
+ ret |= delete_git_work_tree(wt);
+ /*
+ * continue on even if ret is non-zero, there's no going back
+ * from here.
+ */
+ ret |= delete_git_dir(wt);
+
+ free_worktrees(worktrees);
+ return ret;
+}
+
int cmd_worktree(int ac, const char **av, const char *prefix)
{
struct option options[] = {
@@ -712,5 +842,7 @@ int cmd_worktree(int ac, const char **av, const char *prefix)
return unlock_worktree(ac - 1, av + 1, prefix);
if (!strcmp(av[1], "move"))
return move_worktree(ac - 1, av + 1, prefix);
+ if (!strcmp(av[1], "remove"))
+ return remove_worktree(ac - 1, av + 1, prefix);
usage_with_options(worktree_usage, options);
}
