clone: create intermediate directories of destination repo

The shell version used to use "mkdir -p" to create the repo
path, but the C version just calls "mkdir". Let's replicate
the old behavior. We have to create the git and worktree
leading dirs separately; while most of the time, the
worktree dir contains the git dir (as .git), the user can
override this using GIT_WORK_TREE.

We can reuse safe_create_leading_directories, but we need to
make a copy of our const buffer to do so. Since
merge-recursive uses the same pattern, we can factor this
out into a global function. This has two other cleanup
advantages for merge-recursive:

  1. mkdir_p wasn't a very good name. "mkdir -p foo/bar" actually
     creates bar, but this function just creates the leading
     directories.

  2. mkdir_p took a mode argument, but it was completely
     ignored.

Acked-by: Daniel Barkalow <barkalow@iabervon.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-clone.c

@@ -400,6 +400,9 @@ 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);
 		if (mkdir(work_tree, 0755))
 			die("could not create work tree dir '%s'.", work_tree);
 		set_git_work_tree(work_tree);
@@ -410,6 +413,8 @@ int cmd_clone(int argc, const char **argv, const char *prefix)
 
 	setenv(CONFIG_ENVIRONMENT, xstrdup(mkpath("%s/config", git_dir)), 1);
 
+	if (safe_create_leading_directories_const(git_dir) < 0)
+		die("could not create leading directories of '%s'", git_dir);
 	set_git_dir(make_absolute_path(git_dir));
 
 	fprintf(stderr, "Initialize %s\n", git_dir);

builtin-merge-recursive.c

@@ -481,15 +481,6 @@ static char *unique_path(const char *path, const char *branch)
 	return newpath;
 }
 
-static int mkdir_p(const char *path, unsigned long mode)
-{
-	/* path points to cache entries, so xstrdup before messing with it */
-	char *buf = xstrdup(path);
-	int result = safe_create_leading_directories(buf);
-	free(buf);
-	return result;
-}
-
 static void flush_buffer(int fd, const char *buf, unsigned long size)
 {
 	while (size > 0) {
@@ -512,7 +503,7 @@ static int make_room_for_path(const char *path)
 	int status;
 	const char *msg = "failed to create path '%s'%s";
 
-	status = mkdir_p(path, 0777);
+	status = safe_create_leading_directories_const(path);
 	if (status) {
 		if (status == -3) {
 			/* something else exists */
@@ -583,7 +574,7 @@ static void update_file_flags(const unsigned char *sha,
 			close(fd);
 		} else if (S_ISLNK(mode)) {
 			char *lnk = xmemdupz(buf, size);
-			mkdir_p(path, 0777);
+			safe_create_leading_directories_const(path);
 			unlink(path);
 			symlink(lnk, path);
 			free(lnk);

cache.h

@@ -518,6 +518,7 @@ enum sharedrepo {
 int git_config_perm(const char *var, const char *value);
 int adjust_shared_perm(const char *path);
 int safe_create_leading_directories(char *path);
+int safe_create_leading_directories_const(const char *path);
 char *enter_repo(char *path, int strict);
 static inline int is_absolute_path(const char *path)
 {

sha1_file.c

@@ -116,6 +116,15 @@ int safe_create_leading_directories(char *path)
 	return 0;
 }
 
+int safe_create_leading_directories_const(const char *path)
+{
+	/* path points to cache entries, so xstrdup before messing with it */
+	char *buf = xstrdup(path);
+	int result = safe_create_leading_directories(buf);
+	free(buf);
+	return result;
+}
+
 char *sha1_to_hex(const unsigned char *sha1)
 {
 	static int bufno;

t/t5601-clone.sh

@@ -30,4 +30,26 @@ test_expect_success 'clone checks out files' '
 
 '
 
+test_expect_success 'clone respects GIT_WORK_TREE' '
+
+	GIT_WORK_TREE=worktree git clone src bare &&
+	test -f bare/config &&
+	test -f worktree/file
+
+'
+
+test_expect_success 'clone creates intermediate directories' '
+
+	git clone src long/path/to/dst &&
+	test -f long/path/to/dst/file
+
+'
+
+test_expect_success 'clone creates intermediate directories for bare repo' '
+
+	git clone --bare src long/path/to/bare/dst &&
+	test -f long/path/to/bare/dst/config
+
+'
+
 test_done