It is normal to have .git/refs/heads/foo directory which is
empty after the last branch whose name starts with foo/ is
removed. Make sure we notice this case and allow creation of
branch foo by removing the empty directory.
Signed-off-by: Junio C Hamano <junkio@xxxxxxx>
---
* Recent git-branch in "next" does the moral equivalent of this
itself, but other users of git-update-ref would not be helped
without something like this.
We would need to do the same for $GIT_DIR/logs/ but that is
for a later round. I want to get the deletion of packed refs
right first but before doing that the code needs some more
clean-ups.
refs.c | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 files changed, 64 insertions(+), 0 deletions(-)
diff --git a/refs.c b/refs.c
index 3d4cdd1..b433c0c 100644
--- a/refs.c
+++ b/refs.c
@@ -473,6 +473,59 @@ static struct ref_lock *verify_lock(stru
return lock;
}
+static int remove_empty_dir_recursive(char *path, int len)
+{
+ DIR *dir = opendir(path);
+ struct dirent *e;
+ int ret = 0;
+
+ if (!dir)
+ return -1;
+ if (path[len-1] != '/')
+ path[len++] = '/';
+ while ((e = readdir(dir)) != NULL) {
+ struct stat st;
+ int namlen;
+ if ((e->d_name[0] == '.') &&
+ ((e->d_name[1] == 0) ||
+ ((e->d_name[1] == '.') && e->d_name[2] == 0)))
+ continue; /* "." and ".." */
+
+ namlen = strlen(e->d_name);
+ if ((len + namlen < PATH_MAX) &&
+ strcpy(path + len, e->d_name) &&
+ !lstat(path, &st) &&
+ S_ISDIR(st.st_mode) &&
+ remove_empty_dir_recursive(path, len + namlen))
+ continue; /* happy */
+
+ /* path too long, stat fails, or non-directory still exists */
+ ret = -1;
+ break;
+ }
+ closedir(dir);
+ if (!ret) {
+ path[len] = 0;
+ ret = rmdir(path);
+ }
+ return ret;
+}
+
+static int remove_empty_directories(char *file)
+{
+ /* we want to create a file but there is a directory there;
+ * if that is an empty directory (or a directory that contains
+ * only empty directories), remove them.
+ */
+ char path[PATH_MAX];
+ int len = strlen(file);
+
+ if (len >= PATH_MAX) /* path too long ;-) */
+ return -1;
+ strcpy(path, file);
+ return remove_empty_dir_recursive(path, len);
+}
+
static struct ref_lock *lock_ref_sha1_basic(const char *ref, const unsigned char *old_sha1)
{
char *ref_file;
@@ -485,6 +538,17 @@ static struct ref_lock *lock_ref_sha1_ba
lock->lock_fd = -1;
ref = resolve_ref(ref, lock->old_sha1, mustexist, NULL);
+ if (!ref && errno == EISDIR) {
+ /* we are trying to lock foo but we used to
+ * have foo/bar which now does not exist;
+ * it is normal for the empty directory 'foo'
+ * to remain.
+ */
+ ref_file = git_path("%s", orig_ref);
+ if (remove_empty_directories(ref_file))
+ die("there are still refs under '%s'", orig_ref);
+ ref = resolve_ref(orig_ref, lock->old_sha1, mustexist, NULL);
+ }
if (!ref) {
int last_errno = errno;
error("unable to resolve reference %s: %s",
--
1.4.2.1.g5a98f
-
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