Merge branch 'ab/commit-graph-progress'

Generation of (experimental) commit-graph files have so far been
fairly silent, even though it takes noticeable amount of time in a
meaningfully large repository.  The users will now see progress
output.

* ab/commit-graph-progress:
  gc: fix regression in 7b0f229222 impacting --quiet
  commit-graph verify: add progress output
  commit-graph write: add progress output

builtin/commit-graph.c

@@ -151,7 +151,7 @@ static int graph_write(int argc, const char **argv)
 		opts.obj_dir = get_object_directory();
 
 	if (opts.reachable) {
-		write_commit_graph_reachable(opts.obj_dir, opts.append);
+		write_commit_graph_reachable(opts.obj_dir, opts.append, 1);
 		return 0;
 	}
 
@@ -171,7 +171,8 @@ static int graph_write(int argc, const char **argv)
 	write_commit_graph(opts.obj_dir,
 			   pack_indexes,
 			   commit_hex,
-			   opts.append);
+			   opts.append,
+			   1);
 
 	string_list_clear(&lines, 0);
 	return 0;

builtin/commit.c

@@ -1654,7 +1654,7 @@ 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);
+		write_commit_graph_reachable(get_object_directory(), 0, 0);
 
 	rerere(0);
 	run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);

builtin/gc.c

@@ -646,7 +646,8 @@ int cmd_gc(int argc, const char **argv, const char *prefix)
 		clean_pack_garbage();
 
 	if (gc_write_commit_graph)
-		write_commit_graph_reachable(get_object_directory(), 0);
+		write_commit_graph_reachable(get_object_directory(), 0,
+					     !quiet && !daemonized);
 
 	if (auto_gc && too_many_loose_objects())
 		warning(_("There are too many unreachable loose objects; "

commit-graph.c

@@ -13,6 +13,7 @@
 #include "commit-graph.h"
 #include "object-store.h"
 #include "alloc.h"
+#include "progress.h"
 
 #define GRAPH_SIGNATURE 0x43475048 /* "CGPH" */
 #define GRAPH_CHUNKID_OIDFANOUT 0x4f494446 /* "OIDF" */
@@ -567,6 +568,8 @@ struct packed_oid_list {
 	struct object_id *list;
 	int nr;
 	int alloc;
+	struct progress *progress;
+	int progress_done;
 };
 
 static int add_packed_commits(const struct object_id *oid,
@@ -579,6 +582,9 @@ static int add_packed_commits(const struct object_id *oid,
 	off_t offset = nth_packed_object_offset(pack, pos);
 	struct object_info oi = OBJECT_INFO_INIT;
 
+	if (list->progress)
+		display_progress(list->progress, ++list->progress_done);
+
 	oi.typep = &type;
 	if (packed_object_info(the_repository, pack, offset, &oi) < 0)
 		die(_("unable to get type of object %s"), oid_to_hex(oid));
@@ -606,12 +612,18 @@ static void add_missing_parents(struct packed_oid_list *oids, struct commit *com
 	}
 }
 
-static void close_reachable(struct packed_oid_list *oids)
+static void close_reachable(struct packed_oid_list *oids, int report_progress)
 {
 	int i;
 	struct commit *commit;
+	struct progress *progress = NULL;
+	int j = 0;
 
+	if (report_progress)
+		progress = start_delayed_progress(
+			_("Annotating commits in commit graph"), 0);
 	for (i = 0; i < oids->nr; i++) {
+		display_progress(progress, ++j);
 		commit = lookup_commit(the_repository, &oids->list[i]);
 		if (commit)
 			commit->object.flags |= UNINTERESTING;
@@ -623,6 +635,7 @@ static void close_reachable(struct packed_oid_list *oids)
 	 * closure.
 	 */
 	for (i = 0; i < oids->nr; i++) {
+		display_progress(progress, ++j);
 		commit = lookup_commit(the_repository, &oids->list[i]);
 
 		if (commit && !parse_commit(commit))
@@ -630,19 +643,28 @@ static void close_reachable(struct packed_oid_list *oids)
 	}
 
 	for (i = 0; i < oids->nr; i++) {
+		display_progress(progress, ++j);
 		commit = lookup_commit(the_repository, &oids->list[i]);
 
 		if (commit)
 			commit->object.flags &= ~UNINTERESTING;
 	}
+	stop_progress(&progress);
 }
 
-static void compute_generation_numbers(struct packed_commit_list* commits)
+static void compute_generation_numbers(struct packed_commit_list* commits,
+				       int report_progress)
 {
 	int i;
 	struct commit_list *list = NULL;
+	struct progress *progress = NULL;
 
+	if (report_progress)
+		progress = start_progress(
+			_("Computing commit graph generation numbers"),
+			commits->nr);
 	for (i = 0; i < commits->nr; i++) {
+		display_progress(progress, i + 1);
 		if (commits->list[i]->generation != GENERATION_NUMBER_INFINITY &&
 		    commits->list[i]->generation != GENERATION_NUMBER_ZERO)
 			continue;
@@ -674,6 +696,7 @@ static void compute_generation_numbers(struct packed_commit_list* commits)
 			}
 		}
 	}
+	stop_progress(&progress);
 }
 
 static int add_ref_to_list(const char *refname,
@@ -686,19 +709,20 @@ static int add_ref_to_list(const char *refname,
 	return 0;
 }
 
-void write_commit_graph_reachable(const char *obj_dir, int append)
+void write_commit_graph_reachable(const char *obj_dir, int append,
+				  int report_progress)
 {
 	struct string_list list;
 
 	string_list_init(&list, 1);
 	for_each_ref(add_ref_to_list, &list);
-	write_commit_graph(obj_dir, NULL, &list, append);
+	write_commit_graph(obj_dir, NULL, &list, append, report_progress);
 }
 
 void write_commit_graph(const char *obj_dir,
 			struct string_list *pack_indexes,
 			struct string_list *commit_hex,
-			int append)
+			int append, int report_progress)
 {
 	struct packed_oid_list oids;
 	struct packed_commit_list commits;
@@ -711,9 +735,12 @@ void write_commit_graph(const char *obj_dir,
 	int num_chunks;
 	int num_extra_edges;
 	struct commit_list *parent;
+	struct progress *progress = NULL;
 
 	oids.nr = 0;
 	oids.alloc = approximate_object_count() / 4;
+	oids.progress = NULL;
+	oids.progress_done = 0;
 
 	if (append) {
 		prepare_commit_graph_one(the_repository, obj_dir);
@@ -740,6 +767,11 @@ void write_commit_graph(const char *obj_dir,
 		int dirlen;
 		strbuf_addf(&packname, "%s/pack/", obj_dir);
 		dirlen = packname.len;
+		if (report_progress) {
+			oids.progress = start_delayed_progress(
+				_("Finding commits for commit graph"), 0);
+			oids.progress_done = 0;
+		}
 		for (i = 0; i < pack_indexes->nr; i++) {
 			struct packed_git *p;
 			strbuf_setlen(&packname, dirlen);
@@ -752,15 +784,21 @@ void write_commit_graph(const char *obj_dir,
 			for_each_object_in_pack(p, add_packed_commits, &oids, 0);
 			close_pack(p);
 		}
+		stop_progress(&oids.progress);
 		strbuf_release(&packname);
 	}
 
 	if (commit_hex) {
+		if (report_progress)
+			progress = start_delayed_progress(
+				_("Finding commits for commit graph"),
+				commit_hex->nr);
 		for (i = 0; i < commit_hex->nr; i++) {
 			const char *end;
 			struct object_id oid;
 			struct commit *result;
 
+			display_progress(progress, i + 1);
 			if (commit_hex->items[i].string &&
 			    parse_oid_hex(commit_hex->items[i].string, &oid, &end))
 				continue;
@@ -773,12 +811,18 @@ void write_commit_graph(const char *obj_dir,
 				oids.nr++;
 			}
 		}
+		stop_progress(&progress);
 	}
 
-	if (!pack_indexes && !commit_hex)
+	if (!pack_indexes && !commit_hex) {
+		if (report_progress)
+			oids.progress = start_delayed_progress(
+				_("Finding commits for commit graph"), 0);
 		for_each_packed_object(add_packed_commits, &oids, 0);
+		stop_progress(&oids.progress);
+	}
 
-	close_reachable(&oids);
+	close_reachable(&oids, report_progress);
 
 	QSORT(oids.list, oids.nr, commit_compare);
 
@@ -818,7 +862,7 @@ void write_commit_graph(const char *obj_dir,
 	if (commits.nr >= GRAPH_PARENT_MISSING)
 		die(_("too many commits to write graph"));
 
-	compute_generation_numbers(&commits);
+	compute_generation_numbers(&commits, report_progress);
 
 	graph_name = get_commit_graph_filename(obj_dir);
 	if (safe_create_leading_directories(graph_name))
@@ -897,6 +941,7 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g)
 	int generation_zero = 0;
 	struct hashfile *f;
 	int devnull;
+	struct progress *progress = NULL;
 
 	if (!g) {
 		graph_report("no commit-graph file loaded");
@@ -964,11 +1009,14 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g)
 	if (verify_commit_graph_error & ~VERIFY_COMMIT_GRAPH_ERROR_HASH)
 		return verify_commit_graph_error;
 
+	progress = start_progress(_("Verifying commits in commit graph"),
+				  g->num_commits);
 	for (i = 0; i < g->num_commits; i++) {
 		struct commit *graph_commit, *odb_commit;
 		struct commit_list *graph_parents, *odb_parents;
 		uint32_t max_generation = 0;
 
+		display_progress(progress, i + 1);
 		hashcpy(cur_oid.hash, g->chunk_oid_lookup + g->hash_len * i);
 
 		graph_commit = lookup_commit(r, &cur_oid);
@@ -1045,6 +1093,7 @@ int verify_commit_graph(struct repository *r, struct commit_graph *g)
 				     graph_commit->date,
 				     odb_commit->date);
 	}
+	stop_progress(&progress);
 
 	return verify_commit_graph_error;
 }

commit-graph.h

@@ -60,11 +60,12 @@ struct commit_graph *load_commit_graph_one(const char *graph_file);
  */
 int generation_numbers_enabled(struct repository *r);
 
-void write_commit_graph_reachable(const char *obj_dir, int append);
+void write_commit_graph_reachable(const char *obj_dir, int append,
+				  int report_progress);
 void write_commit_graph(const char *obj_dir,
 			struct string_list *pack_indexes,
 			struct string_list *commit_hex,
-			int append);
+			int append, int report_progress);
 
 int verify_commit_graph(struct repository *r, struct commit_graph *g);
 

t/t6500-gc.sh

@@ -4,6 +4,7 @@ test_description='basic git gc tests
 '
 
 . ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-terminal.sh
 
 test_expect_success 'setup' '
 	# do not let the amount of physical memory affects gc
@@ -99,6 +100,26 @@ test_expect_success 'auto gc with too many loose objects does not attempt to cre
 	test_line_count = 2 new # There is one new pack and its .idx
 '
 
+test_expect_success 'gc --no-quiet' '
+	git -c gc.writeCommitGraph=true gc --no-quiet >stdout 2>stderr &&
+	test_must_be_empty stdout &&
+	test_line_count = 1 stderr &&
+	test_i18ngrep "Computing commit graph generation numbers" stderr
+'
+
+test_expect_success TTY 'with TTY: gc --no-quiet' '
+	test_terminal git -c gc.writeCommitGraph=true gc --no-quiet >stdout 2>stderr &&
+	test_must_be_empty stdout &&
+	test_i18ngrep "Enumerating objects" stderr &&
+	test_i18ngrep "Computing commit graph generation numbers" stderr
+'
+
+test_expect_success 'gc --quiet' '
+	git -c gc.writeCommitGraph=true gc --quiet >stdout 2>stderr &&
+	test_must_be_empty stdout &&
+	test_must_be_empty stderr
+'
+
 run_and_wait_for_auto_gc () {
 	# We read stdout from gc for the side effect of waiting until the
 	# background gc process exits, closing its fd 9.  Furthermore, the