From: Ronnie Sahlberg <sahlb...@google.com>
write_ref_sha1 tries to update the reflog while updating the ref.
Move these reflog changes out into its own function so that we can do the
same thing if we write a sha1 ref differently, for example by writing a ref
to the packed refs file instead.
No functional changes intended. We only move some code out into a separate
function.
Signed-off-by: Ronnie Sahlberg <sahlb...@google.com>
Signed-off-by: Stefan Beller <sbel...@google.com>
---
refs.c | 60 +++++++++++++++++++++++++++++++++++-------------------------
1 file changed, 35 insertions(+), 25 deletions(-)
diff --git a/refs.c b/refs.c
index 2db1dff..75c6d3b 100644
--- a/refs.c
+++ b/refs.c
@@ -3028,6 +3028,40 @@ int is_branch(const char *refname)
return !strcmp(refname, "HEAD") || starts_with(refname, "refs/heads/");
}
+static int write_sha1_update_reflog(struct ref_lock *lock,
+ const unsigned char *sha1, const char *logmsg)
+{
+ if (log_ref_write(lock->ref_name, lock->old_sha1, sha1, logmsg) < 0 ||
+ (strcmp(lock->ref_name, lock->orig_ref_name) &&
+ log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) <
0)) {
+ unlock_ref(lock);
+ return -1;
+ }
+ if (strcmp(lock->orig_ref_name, "HEAD") != 0) {
+ /*
+ * Special hack: If a branch is updated directly and HEAD
+ * points to it (may happen on the remote side of a push
+ * for example) then logically the HEAD reflog should be
+ * updated too.
+ * A generic solution implies reverse symref information,
+ * but finding all symrefs pointing to the given branch
+ * would be rather costly for this rare event (the direct
+ * update of a branch) to be worth it. So let's cheat and
+ * check with HEAD only which should cover 99% of all usage
+ * scenarios (even 100% of the default ones).
+ */
+ unsigned char head_sha1[20];
+ int head_flag;
+ const char *head_ref;
+ head_ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
+ head_sha1, &head_flag);
+ if (head_ref && (head_flag & REF_ISSYMREF) &&
+ !strcmp(head_ref, lock->ref_name))
+ log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
+ }
+ return 0;
+}
+
/*
* Write sha1 into the ref specified by the lock. Make sure that errno
* is sane on error.
@@ -3071,34 +3105,10 @@ static int write_ref_sha1(struct ref_lock *lock,
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) &&
- log_ref_write(lock->orig_ref_name, lock->old_sha1, sha1, logmsg) <
0)) {
+ if (write_sha1_update_reflog(lock, sha1, logmsg)) {
unlock_ref(lock);
return -1;
}
- if (strcmp(lock->orig_ref_name, "HEAD") != 0) {
- /*
- * Special hack: If a branch is updated directly and HEAD
- * points to it (may happen on the remote side of a push
- * for example) then logically the HEAD reflog should be
- * updated too.
- * A generic solution implies reverse symref information,
- * but finding all symrefs pointing to the given branch
- * would be rather costly for this rare event (the direct
- * update of a branch) to be worth it. So let's cheat and
- * check with HEAD only which should cover 99% of all usage
- * scenarios (even 100% of the default ones).
- */
- unsigned char head_sha1[20];
- int head_flag;
- const char *head_ref;
- head_ref = resolve_ref_unsafe("HEAD", RESOLVE_REF_READING,
- head_sha1, &head_flag);
- if (head_ref && (head_flag & REF_ISSYMREF) &&
- !strcmp(head_ref, lock->ref_name))
- log_ref_write("HEAD", lock->old_sha1, sha1, logmsg);
- }
if (commit_ref(lock)) {
error("Couldn't set %s", lock->ref_name);
unlock_ref(lock);
--
2.2.0.rc2.5.gf7b9fb2
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