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refs: allow log-only updates

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The refs infrastructure learns about log-only ref updates, which only
update the reflog.  Later, we will use this to separate symbolic
reference resolution from ref updating.

Signed-off-by: David Turner <dturner@twopensource.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
This commit is contained in:
David Turner 2016-02-24 17:58:50 -05:00 committed by Michael Haggerty
parent 8bb0455367
commit d99aa884df
2 changed files with 17 additions and 6 deletions
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16
refs/files-backend.c
View File

@ -2683,7 +2683,7 @@ static int commit_ref_update(struct ref_lock *lock,
}
}
}
if (commit_ref(lock)) {
if (!(flags & REF_LOG_ONLY) && commit_ref(lock)) {
strbuf_addf(err, "couldn't set '%s'", lock->ref_name);
unlock_ref(lock);
return -1;
@ -3101,7 +3101,8 @@ int ref_transaction_commit(struct ref_transaction *transaction,
goto cleanup;
}
if ((update->flags & REF_HAVE_NEW) &&
!(update->flags & REF_DELETING)) {
!(update->flags & REF_DELETING) &&
!(update->flags & REF_LOG_ONLY)) {
int overwriting_symref = ((update->type & REF_ISSYMREF) &&
(update->flags & REF_NODEREF));
@ -3133,8 +3134,9 @@ int ref_transaction_commit(struct ref_transaction *transaction,
}
if (!(update->flags & REF_NEEDS_COMMIT)) {
/*
* We didn't have to write anything to the lockfile.
* Close it to free up the file descriptor:
* We didn't call write_ref_to_lockfile(), so
* the lockfile is still open. Close it to
* free up the file descriptor:
*/
if (close_ref(update->lock)) {
strbuf_addf(err, "couldn't close '%s.lock'",
@ -3149,7 +3151,8 @@ int ref_transaction_commit(struct ref_transaction *transaction,
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
if (update->flags & REF_NEEDS_COMMIT) {
if (update->flags & REF_NEEDS_COMMIT ||
update->flags & REF_LOG_ONLY) {
if (commit_ref_update(update->lock,
update->new_sha1, update->msg,
update->flags, err)) {
@ -3168,7 +3171,8 @@ int ref_transaction_commit(struct ref_transaction *transaction,
for (i = 0; i < transaction->nr; i++) {
struct ref_update *update = transaction->updates[i];
if (update->flags & REF_DELETING) {
if (update->flags & REF_DELETING &&
!(update->flags & REF_LOG_ONLY)) {
if (delete_ref_loose(update->lock, update->type, err)) {
ret = TRANSACTION_GENERIC_ERROR;
goto cleanup;

7
refs/refs-internal.h
View File

@ -42,6 +42,13 @@
* value to ref_update::flags
*/
/*
* Used as a flag in ref_update::flags when we want to log a ref
* update but not actually perform it. This is used when a symbolic
* ref update is split up.
*/
#define REF_LOG_ONLY 0x80
/*
* Return true iff refname is minimally safe. "Safe" here means that
* deleting a loose reference by this name will not do any damage, for