Merge branch 'tb/commit-graph-no-check-oids'

Clean-up the commit-graph codepath.

* tb/commit-graph-no-check-oids:
  commit-graph: drop COMMIT_GRAPH_WRITE_CHECK_OIDS flag
  t5318: reorder test below 'graph_read_expect'
  commit-graph.c: simplify 'fill_oids_from_commits'
  builtin/commit-graph.c: dereference tags in builtin
  builtin/commit-graph.c: extract 'read_one_commit()'
  commit-graph.c: peel refs in 'add_ref_to_set'
  commit-graph.c: show progress of finding reachable commits
  commit-graph.c: extract 'refs_cb_data'

5 files changed, 95 insertions, 77 deletions

diff --git a/Documentation/git-commit-graph.txt b/Documentation/git-commit-graph.txt
index a3d996787b..8ca1764d3d 100644
--- a/Documentation/git-commit-graph.txt
+++ b/Documentation/git-commit-graph.txt
@@ -47,8 +47,10 @@ with `--stdin-commits` or `--reachable`.)
 +
 With the `--stdin-commits` option, generate the new commit graph by
 walking commits starting at the commits specified in stdin as a list
-of OIDs in hex, one OID per line. (Cannot be combined with
-`--stdin-packs` or `--reachable`.)
+of OIDs in hex, one OID per line. OIDs that resolve to non-commits
+(either directly, or by peeling tags) are silently ignored. OIDs that
+are malformed, or do not exist generate an error. (Cannot be combined
+with `--stdin-packs` or `--reachable`.)
 +
 With the `--reachable` option, generate the new commit graph by walking
 commits starting at all refs. (Cannot be combined with `--stdin-commits`
diff --git a/builtin/commit-graph.c b/builtin/commit-graph.c
index 15fe60317c..75455da138 100644
--- a/builtin/commit-graph.c
+++ b/builtin/commit-graph.c
@@ -6,6 +6,8 @@
 #include "repository.h"
 #include "commit-graph.h"
 #include "object-store.h"
+#include "progress.h"
+#include "tag.h"
 
 static char const * const builtin_commit_graph_usage[] = {
 	N_("git commit-graph verify [--object-dir <objdir>] [--shallow] [--[no-]progress]"),
@@ -138,14 +140,37 @@ static int write_option_parse_split(const struct option *opt, const char *arg,
 	return 0;
 }
 
+static int read_one_commit(struct oidset *commits, struct progress *progress,
+			   const char *hash)
+{
+	struct object *result;
+	struct object_id oid;
+	const char *end;
+
+	if (parse_oid_hex(hash, &oid, &end))
+		return error(_("unexpected non-hex object ID: %s"), hash);
+
+	result = deref_tag(the_repository, parse_object(the_repository, &oid),
+			   NULL, 0);
+	if (!result)
+		return error(_("invalid object: %s"), hash);
+	else if (object_as_type(the_repository, result, OBJ_COMMIT, 1))
+		oidset_insert(commits, &result->oid);
+
+	display_progress(progress, oidset_size(commits));
+
+	return 0;
+}
+
 static int graph_write(int argc, const char **argv)
 {
-	struct string_list *pack_indexes = NULL;
+	struct string_list pack_indexes = STRING_LIST_INIT_NODUP;
+	struct strbuf buf = STRBUF_INIT;
 	struct oidset commits = OIDSET_INIT;
 	struct object_directory *odb = NULL;
-	struct string_list lines;
 	int result = 0;
 	enum commit_graph_write_flags flags = 0;
+	struct progress *progress = NULL;
 
 	static struct option builtin_commit_graph_write_options[] = {
 		OPT_STRING(0, "object-dir", &opts.obj_dir,
@@ -209,44 +234,38 @@ static int graph_write(int argc, const char **argv)
 		return 0;
 	}
 
-	string_list_init(&lines, 0);
-	if (opts.stdin_packs || opts.stdin_commits) {
-		struct strbuf buf = STRBUF_INIT;
-
+	if (opts.stdin_packs) {
 		while (strbuf_getline(&buf, stdin) != EOF)
-			string_list_append(&lines, strbuf_detach(&buf, NULL));
-
-		if (opts.stdin_packs)
-			pack_indexes = &lines;
-		if (opts.stdin_commits) {
-			struct string_list_item *item;
-			oidset_init(&commits, lines.nr);
-			for_each_string_list_item(item, &lines) {
-				struct object_id oid;
-				const char *end;
-
-				if (parse_oid_hex(item->string, &oid, &end)) {
-					error(_("unexpected non-hex object ID: "
-						"%s"), item->string);
-					return 1;
-				}
-
-				oidset_insert(&commits, &oid);
+			string_list_append(&pack_indexes,
+					   strbuf_detach(&buf, NULL));
+	} else if (opts.stdin_commits) {
+		oidset_init(&commits, 0);
+		if (opts.progress)
+			progress = start_delayed_progress(
+				_("Collecting commits from input"), 0);
+
+		while (strbuf_getline(&buf, stdin) != EOF) {
+			if (read_one_commit(&commits, progress, buf.buf)) {
+				result = 1;
+				goto cleanup;
 			}
-			flags |= COMMIT_GRAPH_WRITE_CHECK_OIDS;
 		}
 
-		UNLEAK(buf);
+
 	}
 
 	if (write_commit_graph(odb,
-			       pack_indexes,
+			       opts.stdin_packs ? &pack_indexes : NULL,
 			       opts.stdin_commits ? &commits : NULL,
 			       flags,
 			       &split_opts))
 		result = 1;
 
-	UNLEAK(lines);
+cleanup:
+	string_list_clear(&pack_indexes, 0);
+	strbuf_release(&buf);
+	if (progress)
+		stop_progress(&progress);
 	return result;
 }
 
diff --git a/commit-graph.c b/commit-graph.c
index e3420ddcbf..2ff042fbf4 100644
--- a/commit-graph.c
+++ b/commit-graph.c
@@ -881,7 +881,6 @@ struct write_commit_graph_context {
 	unsigned append:1,
 		 report_progress:1,
 		 split:1,
-		 check_oids:1,
 		 changed_paths:1,
 		 order_by_pack:1;
 
@@ -1319,13 +1318,25 @@ static void compute_bloom_filters(struct write_commit_graph_context *ctx)
 	stop_progress(&progress);
 }
 
+struct refs_cb_data {
+	struct oidset *commits;
+	struct progress *progress;
+};
+
 static int add_ref_to_set(const char *refname,
 			  const struct object_id *oid,
 			  int flags, void *cb_data)
 {
-	struct oidset *commits = (struct oidset *)cb_data;
+	struct object_id peeled;
+	struct refs_cb_data *data = (struct refs_cb_data *)cb_data;
+
+	if (!peel_ref(refname, &peeled))
+		oid = &peeled;
+	if (oid_object_info(the_repository, oid, NULL) == OBJ_COMMIT)
+		oidset_insert(data->commits, oid);
+
+	display_progress(data->progress, oidset_size(data->commits));
 
-	oidset_insert(commits, oid);
 	return 0;
 }
 
@@ -1334,13 +1345,22 @@ int write_commit_graph_reachable(struct object_directory *odb,
 				 const struct split_commit_graph_opts *split_opts)
 {
 	struct oidset commits = OIDSET_INIT;
+	struct refs_cb_data data;
 	int result;
 
-	for_each_ref(add_ref_to_set, &commits);
+	memset(&data, 0, sizeof(data));
+	data.commits = &commits;
+	if (flags & COMMIT_GRAPH_WRITE_PROGRESS)
+		data.progress = start_delayed_progress(
+			_("Collecting referenced commits"), 0);
+
+	for_each_ref(add_ref_to_set, &data);
 	result = write_commit_graph(odb, NULL, &commits,
 				    flags, split_opts);
 
 	oidset_clear(&commits);
+	if (data.progress)
+		stop_progress(&data.progress);
 	return result;
 }
 
@@ -1392,46 +1412,19 @@ static int fill_oids_from_packs(struct write_commit_graph_context *ctx,
 static int fill_oids_from_commits(struct write_commit_graph_context *ctx,
 				  struct oidset *commits)
 {
-	uint32_t i = 0;
-	struct strbuf progress_title = STRBUF_INIT;
 	struct oidset_iter iter;
 	struct object_id *oid;
 
 	if (!oidset_size(commits))
 		return 0;
 
-	if (ctx->report_progress) {
-		strbuf_addf(&progress_title,
-			    Q_("Finding commits for commit graph from %d ref",
-			       "Finding commits for commit graph from %d refs",
-			       oidset_size(commits)),
-			    oidset_size(commits));
-		ctx->progress = start_delayed_progress(
-					progress_title.buf,
-					oidset_size(commits));
-	}
-
 	oidset_iter_init(commits, &iter);
 	while ((oid = oidset_iter_next(&iter))) {
-		struct commit *result;
-
-		display_progress(ctx->progress, ++i);
-
-		result = lookup_commit_reference_gently(ctx->r, oid, 1);
-		if (result) {
-			ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc);
-			oidcpy(&ctx->oids.list[ctx->oids.nr], &(result->object.oid));
-			ctx->oids.nr++;
-		} else if (ctx->check_oids) {
-			error(_("invalid commit object id: %s"),
-			      oid_to_hex(oid));
-			return -1;
-		}
+		ALLOC_GROW(ctx->oids.list, ctx->oids.nr + 1, ctx->oids.alloc);
+		oidcpy(&ctx->oids.list[ctx->oids.nr], oid);
+		ctx->oids.nr++;
 	}
 
-	stop_progress(&ctx->progress);
-	strbuf_release(&progress_title);
-
 	return 0;
 }
 
@@ -2017,7 +2010,6 @@ int write_commit_graph(struct object_directory *odb,
 	ctx->append = flags & COMMIT_GRAPH_WRITE_APPEND ? 1 : 0;
 	ctx->report_progress = flags & COMMIT_GRAPH_WRITE_PROGRESS ? 1 : 0;
 	ctx->split = flags & COMMIT_GRAPH_WRITE_SPLIT ? 1 : 0;
-	ctx->check_oids = flags & COMMIT_GRAPH_WRITE_CHECK_OIDS ? 1 : 0;
 	ctx->split_opts = split_opts;
 	ctx->changed_paths = flags & COMMIT_GRAPH_WRITE_BLOOM_FILTERS ? 1 : 0;
 	ctx->total_bloom_filter_data_size = 0;
diff --git a/commit-graph.h b/commit-graph.h
index 4212766a4f..3ba0da1e5f 100644
--- a/commit-graph.h
+++ b/commit-graph.h
@@ -91,9 +91,7 @@ enum commit_graph_write_flags {
 	COMMIT_GRAPH_WRITE_APPEND     = (1 << 0),
 	COMMIT_GRAPH_WRITE_PROGRESS   = (1 << 1),
 	COMMIT_GRAPH_WRITE_SPLIT      = (1 << 2),
-	/* Make sure that each OID in the input is a valid commit OID. */
-	COMMIT_GRAPH_WRITE_CHECK_OIDS = (1 << 3),
-	COMMIT_GRAPH_WRITE_BLOOM_FILTERS = (1 << 4),
+	COMMIT_GRAPH_WRITE_BLOOM_FILTERS = (1 << 3),
 };
 
 enum commit_graph_split_flags {
diff --git a/t/t5318-commit-graph.sh b/t/t5318-commit-graph.sh
index 424599959c..a79c624875 100755
--- a/t/t5318-commit-graph.sh
+++ b/t/t5318-commit-graph.sh
@@ -46,15 +46,6 @@ test_expect_success 'create commits and repack' '
 	git repack
 '
 
-test_expect_success 'exit with correct error on bad input to --stdin-commits' '
-	cd "$TRASH_DIRECTORY/full" &&
-	echo HEAD | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
-	test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
-	# valid tree OID, but not a commit OID
-	git rev-parse HEAD^{tree} | test_expect_code 1 git commit-graph write --stdin-commits 2>stderr &&
-	test_i18ngrep "invalid commit object id" stderr
-'
-
 graph_git_two_modes() {
 	git -c core.commitGraph=true $1 >output
 	git -c core.commitGraph=false $1 >expect
@@ -95,6 +86,22 @@ graph_read_expect() {
 	test_cmp expect output
 }
 
+test_expect_success 'exit with correct error on bad input to --stdin-commits' '
+	cd "$TRASH_DIRECTORY/full" &&
+	# invalid, non-hex OID
+	echo HEAD >in &&
+	test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
+	test_i18ngrep "unexpected non-hex object ID: HEAD" stderr &&
+	# non-existent OID
+	echo $ZERO_OID >in &&
+	test_expect_code 1 git commit-graph write --stdin-commits <in 2>stderr &&
+	test_i18ngrep "invalid object" stderr &&
+	# valid commit and tree OID
+	git rev-parse HEAD HEAD^{tree} >in &&
+	git commit-graph write --stdin-commits <in &&
+	graph_read_expect 3
+'
+
 test_expect_success 'write graph' '
 	cd "$TRASH_DIRECTORY/full" &&
 	git commit-graph write &&