+struct process_commit_data {
+ struct object_id current_commit;
+ struct object_id looking_for;
+ struct strbuf *dst;
+ struct rev_info *revs;
+};
+
+static void process_commit(struct commit *commit, void *data)
+{
+ struct process_commit_data *pcd = data;
+ pcd->current_commit = commit->object.oid;
+}
+
+static void process_object(struct object *obj, const char *path, void *data)
+{
+ struct process_commit_data *pcd = data;
+
+ if (!oidcmp(&pcd->looking_for, &obj->oid) && !pcd->dst->len) {
+ reset_revision_walk();
+ describe_commit(&pcd->current_commit, pcd->dst);
+ strbuf_addf(pcd->dst, ":%s", path);
+ free_commit_list(pcd->revs->commits);
+ pcd->revs->commits = NULL;
+ }
+}
+
+static void describe_blob(struct object_id oid, struct strbuf *dst)
+{
+ struct rev_info revs;
+ struct argv_array args = ARGV_ARRAY_INIT;
+ struct process_commit_data pcd = { null_oid, oid, dst, &revs};
+
+ argv_array_pushl(&args, "internal: The first arg is not parsed",
+ "--objects", "--in-commit-order", "--reverse", "HEAD",
+ NULL);
+
+ init_revisions(&revs, NULL);
+ if (setup_revisions(args.argc, args.argv, &revs, NULL) > 1)
+ BUG("setup_revisions could not handle all args?");
+
+ if (prepare_revision_walk(&revs))
+ die("revision walk setup failed");
+
+ traverse_commit_list(&revs, process_commit, process_object, &pcd);
+ reset_revision_walk();
+}
+