[PATCH v2 5/5] worktree: add "unlock" command

["Nguyễn Thái Ngọc Duy" <pclouds@gmail.com>]

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 Documentation/git-worktree.txt         |  5 +++++
 builtin/worktree.c                     | 34 ++++++++++++++++++++++++++++++++++
 contrib/completion/git-completion.bash |  2 +-
 t/t2028-worktree-move.sh               | 14 ++++++++++++++
 4 files changed, 54 insertions(+), 1 deletion(-)

diff --git a/Documentation/git-worktree.txt b/Documentation/git-worktree.txt
index 004d770..e0f2605 100644
--- a/Documentation/git-worktree.txt
+++ b/Documentation/git-worktree.txt
@@ -13,6 +13,7 @@ SYNOPSIS
 'git worktree list' [--porcelain]
 'git worktree lock' [--reason <string>] <path>
 'git worktree prune' [-n] [-v] [--expire <expire>]
+'git worktree unlock' <path>
 
 DESCRIPTION
 -----------
@@ -73,6 +74,10 @@ prune::
 
 Prune working tree information in $GIT_DIR/worktrees.
 
+unlock::
+
+Unlock a worktree, allowing it to be pruned, moved or deleted.
+
 OPTIONS
 -------
 
diff --git a/builtin/worktree.c b/builtin/worktree.c
index 9008dcd..da9f771 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -16,6 +16,7 @@ static const char * const worktree_usage[] = {
 	N_("git worktree list [<options>]"),
 	N_("git worktree lock [<options>] <path>"),
 	N_("git worktree prune [<options>]"),
+	N_("git worktree unlock <path>"),
 	NULL
 };
 
@@ -500,6 +501,37 @@ static int lock_worktree(int ac, const char **av, const char *prefix)
 	return 0;
 }
 
+static int unlock_worktree(int ac, const char **av, const char *prefix)
+{
+	struct option options[] = {
+		OPT_END()
+	};
+	struct worktree **worktrees, *wt;
+	struct strbuf dst = STRBUF_INIT;
+	int ret;
+
+	ac = parse_options(ac, av, prefix, options, worktree_usage, 0);
+	if (ac != 1)
+		usage_with_options(worktree_usage, options);
+
+	strbuf_addstr(&dst, prefix_filename(prefix,
+					    strlen(prefix),
+					    av[0]));
+
+	worktrees = get_worktrees();
+	wt = find_worktree_by_path(worktrees, dst.buf);
+	strbuf_release(&dst);
+	if (!wt)
+		die(_("'%s' is not a working directory"), av[0]);
+	if (is_main_worktree(wt))
+		die(_("'%s' is a main working directory"), av[0]);
+	if (!is_worktree_locked(wt))
+		die(_("not locked"));
+	ret = unlink_or_warn(git_common_path("worktrees/%s/locked", wt->id));
+	free_worktrees(worktrees);
+	return ret;
+}
+
 int cmd_worktree(int ac, const char **av, const char *prefix)
 {
 	struct option options[] = {
@@ -518,5 +550,7 @@ int cmd_worktree(int ac, const char **av, const char *prefix)
 		return list(ac - 1, av + 1, prefix);
 	if (!strcmp(av[1], "lock"))
 		return lock_worktree(ac - 1, av + 1, prefix);
+	if (!strcmp(av[1], "unlock"))
+		return unlock_worktree(ac - 1, av + 1, prefix);
 	usage_with_options(worktree_usage, options);
 }
diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index f88727d..0e3841d 100644
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -2597,7 +2597,7 @@ _git_whatchanged ()
 
 _git_worktree ()
 {
-	local subcommands="add list lock prune"
+	local subcommands="add list lock prune unlock"
 	local subcommand="$(__git_find_on_cmdline "$subcommands")"
 	if [ -z "$subcommand" ]; then
 		__gitcomp "$subcommands"
diff --git a/t/t2028-worktree-move.sh b/t/t2028-worktree-move.sh
index aeac848..1927537 100755
--- a/t/t2028-worktree-move.sh
+++ b/t/t2028-worktree-move.sh
@@ -51,4 +51,18 @@ test_expect_success 'lock worktree twice (from the locked worktree)' '
 	test_cmp expected .git/worktrees/source/locked
 '
 
+test_expect_success 'unlock main worktree' '
+	test_must_fail git worktree unlock .
+'
+
+test_expect_success 'unlock linked worktree' '
+	git worktree unlock source &&
+	test_path_is_missing .git/worktrees/source/locked
+'
+
+test_expect_success 'unlock worktree twice' '
+	test_must_fail git worktree unlock source &&
+	test_path_is_missing .git/worktrees/source/locked
+'
+
 test_done
-- 
2.8.2.524.g6ff3d78