commit-graph: collapse parameters into flags

The write_commit_graph() and write_commit_graph_reachable() methods
currently take two boolean parameters: 'append' and 'report_progress'.
As we update these methods, adding more parameters this way becomes
cluttered and hard to maintain.

Collapse these parameters into a 'flags' parameter, and adjust the
callers to provide flags as necessary.

Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/commit-graph.c

@@ -142,6 +142,7 @@ static int graph_write(int argc, const char **argv)
 	struct string_list *commit_hex = NULL;
 	struct string_list lines;
 	int result = 0;
+	unsigned int flags = COMMIT_GRAPH_PROGRESS;
 
 	static struct option builtin_commit_graph_write_options[] = {
 		OPT_STRING(0, "object-dir", &opts.obj_dir,
@@ -166,11 +167,13 @@ static int graph_write(int argc, const char **argv)
 		die(_("use at most one of --reachable, --stdin-commits, or --stdin-packs"));
 	if (!opts.obj_dir)
 		opts.obj_dir = get_object_directory();
+	if (opts.append)
+		flags |= COMMIT_GRAPH_APPEND;
 
 	read_replace_refs = 0;
 
 	if (opts.reachable)
-		return write_commit_graph_reachable(opts.obj_dir, opts.append, 1);
+		return write_commit_graph_reachable(opts.obj_dir, flags);
 
 	string_list_init(&lines, 0);
 	if (opts.stdin_packs || opts.stdin_commits) {
@@ -190,8 +193,7 @@ static int graph_write(int argc, const char **argv)
 	if (write_commit_graph(opts.obj_dir,
 			       pack_indexes,
 			       commit_hex,
-			       opts.append,
-			       1))
+			       flags))
 		result = 1;
 
 	UNLEAK(lines);

builtin/commit.c

@@ -1670,7 +1670,7 @@ int cmd_commit(int argc, const char **argv, const char *prefix)
 		      "not exceeded, and then \"git reset HEAD\" to recover."));
 
 	if (git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) &&
-	    write_commit_graph_reachable(get_object_directory(), 0, 0))
+	    write_commit_graph_reachable(get_object_directory(), 0))
 		return 1;
 
 	repo_rerere(the_repository, 0);

builtin/gc.c

@@ -665,8 +665,8 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 	}
 
 	if (gc_write_commit_graph &&
-	    write_commit_graph_reachable(get_object_directory(), 0,
-					 !quiet && !daemonized))
+	    write_commit_graph_reachable(get_object_directory(),
+					 !quiet && !daemonized ? COMMIT_GRAPH_PROGRESS : 0))
 		return 1;
 
 	if (auto_gc && too_many_loose_objects())

commit-graph.c

@@ -851,15 +851,14 @@ static int add_ref_to_list(const char *refname,
 	return 0;
 }
 
-int write_commit_graph_reachable(const char *obj_dir, int append,
-				 int report_progress)
+int write_commit_graph_reachable(const char *obj_dir, unsigned int flags)
 {
 	struct string_list list = STRING_LIST_INIT_DUP;
 	int result;
 
 	for_each_ref(add_ref_to_list, &list);
 	result = write_commit_graph(obj_dir, NULL, &list,
-				    append, report_progress);
+				    flags);
 
 	string_list_clear(&list, 0);
 	return result;
@@ -868,7 +867,7 @@ int write_commit_graph_reachable(const char *obj_dir, int append,
 int write_commit_graph(const char *obj_dir,
 		       struct string_list *pack_indexes,
 		       struct string_list *commit_hex,
-		       int append, int report_progress)
+		       unsigned int flags)
 {
 	struct packed_oid_list oids;
 	struct packed_commit_list commits;
@@ -887,6 +886,8 @@ int write_commit_graph(const char *obj_dir,
 	struct strbuf progress_title = STRBUF_INIT;
 	unsigned long approx_nr_objects;
 	int res = 0;
+	int append = flags & COMMIT_GRAPH_APPEND;
+	int report_progress = flags & COMMIT_GRAPH_PROGRESS;
 
 	if (!commit_graph_compatible(the_repository))
 		return 0;

commit-graph.h

@@ -65,18 +65,20 @@ struct commit_graph *parse_commit_graph(void *graph_map, int fd,
  */
 int generation_numbers_enabled(struct repository *r);
 
+#define COMMIT_GRAPH_APPEND     (1 << 0)
+#define COMMIT_GRAPH_PROGRESS   (1 << 1)
+
 /*
  * The write_commit_graph* methods return zero on success
  * and a negative value on failure. Note that if the repository
  * is not compatible with the commit-graph feature, then the
  * methods will return 0 without writing a commit-graph.
  */
-int write_commit_graph_reachable(const char *obj_dir, int append,
-				  int report_progress);
+int write_commit_graph_reachable(const char *obj_dir, unsigned int flags);
 int write_commit_graph(const char *obj_dir,
 		       struct string_list *pack_indexes,
 		       struct string_list *commit_hex,
-		       int append, int report_progress);
+		       unsigned int flags);
 
 int verify_commit_graph(struct repository *r, struct commit_graph *g);