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write_ref_to_lockfile(): new function, extracted from write_ref_sha1()

Browse source 
This is the first step towards separating the checking and writing of
the new reference value to committing the change.

Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Michael Haggerty 2015-05-10 04:45:32 +02:00 committed by Junio C Hamano
parent 71ad0505cc
commit 1d455231a0
1 changed files with 26 additions and 12 deletions
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38
refs.c
View file

@ -3048,23 +3048,15 @@ int is_branch(const char *refname)
}
/*
* Write sha1 into the ref specified by the lock. Make sure that errno
* is sane on error.
* Write sha1 into the open lockfile, then close the lockfile. On
* errors, rollback the lockfile and set errno to reflect the problem.
*/
static int write_ref_sha1(struct ref_lock *lock,
const unsigned char *sha1, const char *logmsg)
static int write_ref_to_lockfile(struct ref_lock *lock,
const unsigned char *sha1)
{
static char term = '\n';
struct object *o;
if (!lock) {
errno = EINVAL;
return -1;
}
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",
@ -3089,6 +3081,28 @@ static int write_ref_sha1(struct ref_lock *lock,
errno = save_errno;
return -1;
}
return 0;
}
/*
* Write sha1 into the ref specified by the lock. Make sure that errno
* is sane on error.
*/
static int write_ref_sha1(struct ref_lock *lock,
const unsigned char *sha1, const char *logmsg)
{
if (!lock) {
errno = EINVAL;
return -1;
}
if (!lock->force_write && !hashcmp(lock->old_sha1, sha1)) {
unlock_ref(lock);
return 0;
}
if (write_ref_to_lockfile(lock, sha1))
return -1;
clear_loose_ref_cache(&ref_cache);
if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 ||
(strcmp(lock->ref_name, lock->orig_ref_name) &&