[PATCH v2 4/7] worktree move: accept destination as directory

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

Similar to "mv a b/", which is actually "mv a b/a", we extract basename
of source worktree and create a directory of the same name at
destination if dst path is a directory.

Signed-off-by: Nguyễn Thái Ngọc Duy <pclouds@gmail.com>
---
 builtin/worktree.c       | 11 ++++++++++-
 strbuf.c                 |  8 ++++++++
 strbuf.h                 |  3 +++
 t/t2028-worktree-move.sh | 11 +++++++++++
 4 files changed, 32 insertions(+), 1 deletion(-)

diff --git a/builtin/worktree.c b/builtin/worktree.c
index 8b9482d1e5..6fe41313c9 100644
--- a/builtin/worktree.c
+++ b/builtin/worktree.c
@@ -631,8 +631,17 @@ static int move_worktree(int ac, const char **av, const char *prefix)
 		die(_("'%s' is not a working tree"), av[0]);
 	if (is_main_worktree(wt))
 		die(_("'%s' is a main working tree"), av[0]);
+	if (is_directory(dst.buf)) {
+		const char *sep = find_last_dir_sep(wt->path);
+
+		if (!sep)
+			die(_("could not figure out destination name from '%s'"),
+			    wt->path);
+		strbuf_trim_trailing_dir_sep(&dst);
+		strbuf_addstr(&dst, sep);
+	}
 	if (file_exists(dst.buf))
-		die(_("target '%s' already exists"), av[1]);
+		die(_("target '%s' already exists"), dst.buf);
 
 	reason = is_worktree_locked(wt);
 	if (reason) {
diff --git a/strbuf.c b/strbuf.c
index 1df674e919..46930ad027 100644
--- a/strbuf.c
+++ b/strbuf.c
@@ -95,6 +95,7 @@ void strbuf_trim(struct strbuf *sb)
 	strbuf_rtrim(sb);
 	strbuf_ltrim(sb);
 }
+
 void strbuf_rtrim(struct strbuf *sb)
 {
 	while (sb->len > 0 && isspace((unsigned char)sb->buf[sb->len - 1]))
@@ -102,6 +103,13 @@ void strbuf_rtrim(struct strbuf *sb)
 	sb->buf[sb->len] = '\0';
 }
 
+void strbuf_trim_trailing_dir_sep(struct strbuf *sb)
+{
+	while (sb->len > 0 && is_dir_sep((unsigned char)sb->buf[sb->len - 1]))
+		sb->len--;
+	sb->buf[sb->len] = '\0';
+}
+
 void strbuf_ltrim(struct strbuf *sb)
 {
 	char *b = sb->buf;
diff --git a/strbuf.h b/strbuf.h
index 14c8c10d66..e6cae5f439 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -179,6 +179,9 @@ extern void strbuf_trim(struct strbuf *);
 extern void strbuf_rtrim(struct strbuf *);
 extern void strbuf_ltrim(struct strbuf *);
 
+/* Strip trailing directory separators */
+extern void strbuf_trim_trailing_dir_sep(struct strbuf *);
+
 /**
  * Replace the contents of the strbuf with a reencoded form.  Returns -1
  * on error, 0 on success.
diff --git a/t/t2028-worktree-move.sh b/t/t2028-worktree-move.sh
index 0f8abc0854..deb486cd8e 100755
--- a/t/t2028-worktree-move.sh
+++ b/t/t2028-worktree-move.sh
@@ -85,4 +85,15 @@ test_expect_success 'move main worktree' '
 	test_must_fail git worktree move . def
 '
 
+test_expect_success 'move worktree to another dir' '
+	toplevel="$(pwd)" &&
+	mkdir some-dir &&
+	git worktree move destination some-dir &&
+	test_path_is_missing source &&
+	git worktree list --porcelain | grep "^worktree.*/some-dir/destination" &&
+	git -C some-dir/destination log --format=%s >actual2 &&
+	echo init >expected2 &&
+	test_cmp expected2 actual2
+'
+
 test_done
-- 
2.16.1.399.g632f88eed1