fsck: pull out function to check a set of blobs

In `fsck_finish()` we check all blobs for consistency that we have found
during the tree walk, but that haven't yet been checked. This is only
required for gitmodules right now, but will also be required for a new
check for gitattributes.

Pull out a function `fsck_blobs()` that allows the caller to check a set
of blobs for consistency.

Signed-off-by: Patrick Steinhardt <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: pks-t

fsck.c

@@ -1243,45 +1243,55 @@ int fsck_error_function(struct fsck_options *o,
 	return 1;
 }
 
-int fsck_finish(struct fsck_options *options)
+static int fsck_blobs(struct oidset *blobs_found, struct oidset *blobs_done,
+		      enum fsck_msg_id msg_missing, enum fsck_msg_id msg_type,
+		      struct fsck_options *options, const char *blob_type)
 {
 	int ret = 0;
 	struct oidset_iter iter;
 	const struct object_id *oid;
 
-	oidset_iter_init(&options->gitmodules_found, &iter);
+	oidset_iter_init(blobs_found, &iter);
 	while ((oid = oidset_iter_next(&iter))) {
 		enum object_type type;
 		unsigned long size;
 		char *buf;
 
-		if (oidset_contains(&options->gitmodules_done, oid))
+		if (oidset_contains(blobs_done, oid))
 			continue;
 
 		buf = read_object_file(oid, &type, &size);
 		if (!buf) {
 			if (is_promisor_object(oid))
 				continue;
 			ret |= report(options,
-				      oid, OBJ_BLOB,
-				      FSCK_MSG_GITMODULES_MISSING,
-				      "unable to read .gitmodules blob");
+				      oid, OBJ_BLOB, msg_missing,
+				      "unable to read %s blob", blob_type);
 			continue;
 		}
 
 		if (type == OBJ_BLOB)
 			ret |= fsck_blob(oid, buf, size, options);
 		else
-			ret |= report(options,
-				      oid, type,
-				      FSCK_MSG_GITMODULES_BLOB,
-				      "non-blob found at .gitmodules");
+			ret |= report(options, oid, type, msg_type,
+				      "non-blob found at %s", blob_type);
 		free(buf);
 	}
 
+	oidset_clear(blobs_found);
+	oidset_clear(blobs_done);
+
+	return ret;
+}
+
+int fsck_finish(struct fsck_options *options)
+{
+	int ret = 0;
+
+	ret |= fsck_blobs(&options->gitmodules_found, &options->gitmodules_done,
+			  FSCK_MSG_GITMODULES_MISSING, FSCK_MSG_GITMODULES_BLOB,
+			  options, ".gitmodules");
 
-	oidset_clear(&options->gitmodules_found);
-	oidset_clear(&options->gitmodules_done);
 	return ret;
 }