clone: fix creation of explicitly named target directory

'git clone <repo> path/' (note the trailing slash) fails, because the
entire path is interpreted as leading directories. So when mkdir tries to
create the actual path, it already exists.

This makes sure trailing slashes are removed.

Signed-off-by: Clemens Buchacher <drizzd@aon.at>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

2 files changed, 32 insertions, 3 deletions

diff --git a/builtin-clone.c b/builtin-clone.c
index f44eceab3..c8435295c 100644
--- a/builtin-clone.c
+++ b/builtin-clone.c
@@ -147,6 +147,15 @@ static int is_directory(const char *path)
 	return !stat(path, &buf) && S_ISDIR(buf.st_mode);
 }
 
+static void strip_trailing_slashes(char *dir)
+{
+	char *end = dir + strlen(dir);
+
+	while (dir < end - 1 && is_dir_sep(end[-1]))
+		end--;
+	*end = '\0';
+}
+
 static void setup_reference(const char *repo)
 {
 	const char *ref_git;
@@ -397,6 +406,7 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 		dir = xstrdup(argv[1]);
 	else
 		dir = guess_dir_name(repo_name, is_bundle, option_bare);
+	strip_trailing_slashes(dir);
 
 	if (!stat(dir, &buf))
 		die("destination directory '%s' already exists.", dir);
@@ -422,10 +432,11 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 	if (!option_bare) {
 		junk_work_tree = work_tree;
 		if (safe_create_leading_directories_const(work_tree) < 0)
-			die("could not create leading directories of '%s'",
-					work_tree);
+			die("could not create leading directories of '%s': %s",
+					work_tree, strerror(errno));
 		if (mkdir(work_tree, 0755))
-			die("could not create work tree dir '%s'.", work_tree);
+			die("could not create work tree dir '%s': %s.",
+					work_tree, strerror(errno));
 		set_git_work_tree(work_tree);
 	}
 	junk_git_dir = git_dir;
diff --git a/t/t5601-clone.sh b/t/t5601-clone.sh
index 59c65fef2..78a3fa639 100755
--- a/t/t5601-clone.sh
+++ b/t/t5601-clone.sh
@@ -107,4 +107,22 @@ test_expect_success 'clone --mirror does not repeat tags' '
 
 '
 
+test_expect_success 'clone to destination with trailing /' '
+
+	git clone src target-1/ &&
+	T=$( cd target-1 && git rev-parse HEAD ) &&
+	S=$( cd src && git rev-parse HEAD ) &&
+	test "$T" = "$S"
+
+'
+
+test_expect_success 'clone to destination with extra trailing /' '
+
+	git clone src target-2/// &&
+	T=$( cd target-2 && git rev-parse HEAD ) &&
+	S=$( cd src && git rev-parse HEAD ) &&
+	test "$T" = "$S"
+
+'
+
 test_done