[PATCH v3 15/53] reflog_expire: convert to struct object_id

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Adjust the callback functions to take struct object_id * instead of
unsigned char *, and modify related static functions accordingly.

Introduce a temporary object_id instance into files_reflog_expire and
copy the SHA-1 value passed in.  This is necessary because the sha1
parameter can come indirectly from get_sha1.  Without the temporary, it
would require much more refactoring to be able to convert this function.

Signed-off-by: brian m. carlson <sandals@xxxxxxxxxxxxxxxxxxxx>
---
 builtin/reflog.c     | 22 +++++++++++-----------
 refs.h               |  6 +++---
 refs/files-backend.c |  7 +++++--
 3 files changed, 19 insertions(+), 16 deletions(-)

diff --git a/builtin/reflog.c b/builtin/reflog.c
index 747277577..d6718d326 100644
--- a/builtin/reflog.c
+++ b/builtin/reflog.c
@@ -186,13 +186,13 @@ static int commit_is_complete(struct commit *commit)
 	return !is_incomplete;
 }
 
-static int keep_entry(struct commit **it, unsigned char *sha1)
+static int keep_entry(struct commit **it, struct object_id *oid)
 {
 	struct commit *commit;
 
-	if (is_null_sha1(sha1))
+	if (is_null_oid(oid))
 		return 1;
-	commit = lookup_commit_reference_gently(sha1, 1);
+	commit = lookup_commit_reference_gently(oid->hash, 1);
 	if (!commit)
 		return 0;
 
@@ -251,17 +251,17 @@ static void mark_reachable(struct expire_reflog_policy_cb *cb)
 	cb->mark_list = leftover;
 }
 
-static int unreachable(struct expire_reflog_policy_cb *cb, struct commit *commit, unsigned char *sha1)
+static int unreachable(struct expire_reflog_policy_cb *cb, struct commit *commit, struct object_id *oid)
 {
 	/*
 	 * We may or may not have the commit yet - if not, look it
 	 * up using the supplied sha1.
 	 */
 	if (!commit) {
-		if (is_null_sha1(sha1))
+		if (is_null_oid(oid))
 			return 0;
 
-		commit = lookup_commit_reference_gently(sha1, 1);
+		commit = lookup_commit_reference_gently(oid->hash, 1);
 
 		/* Not a commit -- keep it */
 		if (!commit)
@@ -283,7 +283,7 @@ static int unreachable(struct expire_reflog_policy_cb *cb, struct commit *commit
 /*
  * Return true iff the specified reflog entry should be expired.
  */
-static int should_expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
+static int should_expire_reflog_ent(struct object_id *ooid, struct object_id *noid,
 				    const char *email, unsigned long timestamp, int tz,
 				    const char *message, void *cb_data)
 {
@@ -295,13 +295,13 @@ static int should_expire_reflog_ent(unsigned char *osha1, unsigned char *nsha1,
 
 	old = new = NULL;
 	if (cb->cmd.stalefix &&
-	    (!keep_entry(&old, osha1) || !keep_entry(&new, nsha1)))
+	    (!keep_entry(&old, ooid) || !keep_entry(&new, noid)))
 		return 1;
 
 	if (timestamp < cb->cmd.expire_unreachable) {
 		if (cb->unreachable_expire_kind == UE_ALWAYS)
 			return 1;
-		if (unreachable(cb, old, osha1) || unreachable(cb, new, nsha1))
+		if (unreachable(cb, old, ooid) || unreachable(cb, new, noid))
 			return 1;
 	}
 
@@ -326,7 +326,7 @@ static int push_tip_to_list(const char *refname, const struct object_id *oid,
 }
 
 static void reflog_expiry_prepare(const char *refname,
-				  const unsigned char *sha1,
+				  const struct object_id *oid,
 				  void *cb_data)
 {
 	struct expire_reflog_policy_cb *cb = cb_data;
@@ -335,7 +335,7 @@ static void reflog_expiry_prepare(const char *refname,
 		cb->tip_commit = NULL;
 		cb->unreachable_expire_kind = UE_HEAD;
 	} else {
-		cb->tip_commit = lookup_commit_reference_gently(sha1, 1);
+		cb->tip_commit = lookup_commit_reference_gently(oid->hash, 1);
 		if (!cb->tip_commit)
 			cb->unreachable_expire_kind = UE_ALWAYS;
 		else
diff --git a/refs.h b/refs.h
index 07cf4cd41..a22f696dd 100644
--- a/refs.h
+++ b/refs.h
@@ -611,10 +611,10 @@ enum expire_reflog_flags {
  *     unlocked again.
  */
 typedef void reflog_expiry_prepare_fn(const char *refname,
-				      const unsigned char *sha1,
+				      const struct object_id *oid,
 				      void *cb_data);
-typedef int reflog_expiry_should_prune_fn(unsigned char *osha1,
-					  unsigned char *nsha1,
+typedef int reflog_expiry_should_prune_fn(struct object_id *ooid,
+					  struct object_id *noid,
 					  const char *email,
 					  unsigned long timestamp, int tz,
 					  const char *message, void *cb_data);
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 83ea080e0..298a838c5 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -3207,7 +3207,7 @@ static int expire_reflog_ent(struct object_id *ooid, struct object_id *noid,
 	if (cb->flags & EXPIRE_REFLOGS_REWRITE)
 		ooid = &cb->last_kept_oid;
 
-	if ((*cb->should_prune_fn)(ooid->hash, noid->hash, email, timestamp, tz,
+	if ((*cb->should_prune_fn)(ooid, noid, email, timestamp, tz,
 				   message, policy_cb)) {
 		if (!cb->newlog)
 			printf("would prune %s", message);
@@ -3244,6 +3244,7 @@ static int files_reflog_expire(struct ref_store *ref_store,
 	int status = 0;
 	int type;
 	struct strbuf err = STRBUF_INIT;
+	struct object_id oid;
 
 	memset(&cb, 0, sizeof(cb));
 	cb.flags = flags;
@@ -3293,7 +3294,9 @@ static int files_reflog_expire(struct ref_store *ref_store,
 		}
 	}
 
-	(*prepare_fn)(refname, sha1, cb.policy_cb);
+	hashcpy(oid.hash, sha1);
+
+	(*prepare_fn)(refname, &oid, cb.policy_cb);
 	refs_for_each_reflog_ent(ref_store, refname, expire_reflog_ent, &cb);
 	(*cleanup_fn)(cb.policy_cb);
 



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