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authorMichael Haggerty <mhagger@alum.mit.edu>2015-03-02 10:29:52 +0100
committerJunio C Hamano <gitster@pobox.com>2015-03-05 12:35:36 -0800
commit706d5f816fbcb1299c19f4d41bea60f1e229165e (patch)
tree3d2a8d3b4e750d984af6bf88be391bed49ca0182
parent8280bbebd1ecc4633b969a439ed4ca653d1bc958 (diff)
downloadgit-706d5f816fbcb1299c19f4d41bea60f1e229165e.tar.gz
write_ref_sha1(): move write elision test to callers
write_ref_sha1() previously skipped the write if the reference already had the desired value, unless lock->force_write was set. Instead, perform that test at the callers. Two of the callers (in rename_ref()) unconditionally set force_write just before calling write_ref_sha1(), so they don't need the extra check at all. Nor do they need to set force_write anymore. The last caller, in ref_transaction_commit(), still needs the test. Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu> Reviewed-by: Stefan Beller <sbeller@google.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--refs.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/refs.c b/refs.c
index d1130e2259..651e37e127 100644
--- a/refs.c
+++ b/refs.c
@@ -2878,7 +2878,6 @@ int rename_ref(const char *oldrefname, const char *newrefname, const char *logms
error("unable to lock %s for update", newrefname);
goto rollback;
}
- lock->force_write = 1;
hashcpy(lock->old_sha1, orig_sha1);
if (write_ref_sha1(lock, orig_sha1, logmsg)) {
error("unable to write current sha1 into %s", newrefname);
@@ -2894,7 +2893,6 @@ int rename_ref(const char *oldrefname, const char *newrefname, const char *logms
goto rollbacklog;
}
- lock->force_write = 1;
flag = log_all_ref_updates;
log_all_ref_updates = 0;
if (write_ref_sha1(lock, orig_sha1, NULL))
@@ -3080,10 +3078,6 @@ static int write_ref_sha1(struct ref_lock *lock,
static char term = '\n';
struct object *o;
- if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) {
- unlock_ref(lock);
- return 0;
- }
o = parse_object(sha1);
if (!o) {
error("Trying to write ref %s with nonexistent object %s",
@@ -3797,15 +3791,21 @@ int ref_transaction_commit(struct ref_transaction *transaction,
struct ref_update *update = updates[i];
if (!is_null_sha1(update->new_sha1)) {
- if (write_ref_sha1(update->lock, update->new_sha1,
- update->msg)) {
+ if (!update->lock->force_write &&
+ !hashcmp(update->lock->old_sha1, update->new_sha1)) {
+ unlock_ref(update->lock);
+ update->lock = NULL;
+ } else if (write_ref_sha1(update->lock, update->new_sha1,
+ update->msg)) {
update->lock = NULL; /* freed by write_ref_sha1 */
strbuf_addf(err, "Cannot update the ref '%s'.",
update->refname);
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;
+ } else {
+ /* freed by write_ref_sha1(): */
+ update->lock = NULL;
}
- update->lock = NULL; /* freed by write_ref_sha1 */
}
}