From ac5409e420e5fdd7c4a381f873ffcedfb83d7117 Mon Sep 17 00:00:00 2001 From: Junio C Hamano Date: Wed, 27 Sep 2006 01:58:57 -0700 Subject: update-ref: -d flag and ref creation safety. This adds -d flag to update-ref to allow safe deletion of ref. Before deleting it, the command checks if the given still matches the value the caller thought the ref contained. Similarly, it also accepts 0{40} or an empty string as to allow safe creation of a new ref. Signed-off-by: Junio C Hamano --- refs.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) (limited to 'refs.c') diff --git a/refs.c b/refs.c index 9a1bc0db59..3d4cdd1eb9 100644 --- a/refs.c +++ b/refs.c @@ -378,6 +378,32 @@ int get_ref_sha1(const char *ref, unsigned char *sha1) return read_ref(mkpath("refs/%s", ref), sha1); } +int delete_ref(const char *refname, unsigned char *sha1) +{ + struct ref_lock *lock; + int err, i, ret = 0; + + lock = lock_any_ref_for_update(refname, sha1); + if (!lock) + return 1; + i = strlen(lock->lk->filename) - 5; /* .lock */ + lock->lk->filename[i] = 0; + err = unlink(lock->lk->filename); + if (err) { + ret = 1; + error("unlink(%s) failed: %s", + lock->lk->filename, strerror(errno)); + } + lock->lk->filename[i] = '.'; + + err = unlink(lock->log_file); + if (err && errno != ENOENT) + fprintf(stderr, "warning: unlink(%s) failed: %s", + lock->log_file, strerror(errno)); + + return ret; +} + /* * Make sure "ref" is something reasonable to have under ".git/refs/"; * We do not like it if: -- cgit v1.3-5-g9baa