From: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
Date: Mon, 28 Apr 2014 14:36:15 -0700
Wrap all the ref updates inside a transaction.
In the new API there is no distinction between failure to lock and
failure to write a ref. Both can be permanent (e.g., a ref
"refs/heads/topic" is blocking creation of the lock file
"refs/heads/topic/1.lock") or transient (e.g., file system full) and
there's no clear difference in how the client should respond, so
replace the two statuses "failed to lock" and "failed to write" with
a single status "failed to update ref". In both cases a more
detailed message is sent by sideband to diagnose the problem.
Example, before:
error: there are still refs under 'refs/heads/topic'
remote: error: failed to lock refs/heads/topic
To foo
! [remote rejected] HEAD -> topic (failed to lock)
After:
error: there are still refs under 'refs/heads/topic'
remote: error: Cannot lock the ref 'refs/heads/topic'.
To foo
! [remote rejected] HEAD -> topic (failed to update ref)
Signed-off-by: Ronnie Sahlberg <sahlberg@xxxxxxxxxx>
Signed-off-by: Jonathan Nieder <jrnieder@xxxxxxxxx>
---
builtin/receive-pack.c | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/builtin/receive-pack.c b/builtin/receive-pack.c
index c323081..224fadc 100644
--- a/builtin/receive-pack.c
+++ b/builtin/receive-pack.c
@@ -475,7 +475,6 @@ static const char *update(struct command *cmd, struct shallow_info *si)
const char *namespaced_name;
unsigned char *old_sha1 = cmd->old_sha1;
unsigned char *new_sha1 = cmd->new_sha1;
- struct ref_lock *lock;
/* only refs/... are allowed */
if (!starts_with(name, "refs/") || check_refname_format(name + 5, 0)) {
@@ -576,19 +575,27 @@ static const char *update(struct command *cmd, struct shallow_info *si)
return NULL; /* good */
}
else {
+ struct strbuf err = STRBUF_INIT;
+ struct ref_transaction *transaction;
+
if (shallow_update && si->shallow_ref[cmd->index] &&
update_shallow_ref(cmd, si))
return "shallow error";
- lock = lock_any_ref_for_update(namespaced_name, old_sha1,
- 0, NULL);
- if (!lock) {
- rp_error("failed to lock %s", name);
- return "failed to lock";
- }
- if (write_ref_sha1(lock, new_sha1, "push")) {
- return "failed to write"; /* error() already called */
+ transaction = ref_transaction_begin(&err);
+ if (!transaction ||
+ ref_transaction_update(transaction, namespaced_name,
+ new_sha1, old_sha1, 0, 1, &err) ||
+ ref_transaction_commit(transaction, "push", &err)) {
+ ref_transaction_free(transaction);
+
+ rp_error("%s", err.buf);
+ strbuf_release(&err);
+ return "failed to update ref";
}
+
+ ref_transaction_free(transaction);
+ strbuf_release(&err);
return NULL; /* good */
}
}
--
2.1.0.rc2.206.gedb03e5
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