builtin/rev-list.c - jrn/git - Git at Google

 #include "cache.h"
 #include "config.h"
 #include "commit.h"
 #include "diff.h"
 #include "revision.h"
 #include "list-objects.h"
 #include "list-objects-filter.h"
 #include "list-objects-filter-options.h"
 #include "object.h"
 #include "object-store.h"
 #include "pack.h"
 #include "pack-bitmap.h"
 #include "builtin.h"
 #include "log-tree.h"
 #include "graph.h"
 #include "bisect.h"
 #include "progress.h"
 #include "reflog-walk.h"
 #include "oidset.h"
 #include "packfile.h"

 static const char rev_list_usage[] =
 "git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
 "  limiting output:\n"
 "    --max-count=<n>\n"
 "    --max-age=<epoch>\n"
 "    --min-age=<epoch>\n"
 "    --sparse\n"
 "    --no-merges\n"
 "    --min-parents=<n>\n"
 "    --no-min-parents\n"
 "    --max-parents=<n>\n"
 "    --no-max-parents\n"
 "    --remove-empty\n"
 "    --all\n"
 "    --branches\n"
 "    --tags\n"
 "    --remotes\n"
 "    --stdin\n"
 "    --quiet\n"
 "  ordering output:\n"
 "    --topo-order\n"
 "    --date-order\n"
 "    --reverse\n"
 "  formatting output:\n"
 "    --parents\n"
 "    --children\n"
 "    --objects | --objects-edge\n"
 "    --unpacked\n"
 "    --header | --pretty\n"
 "    --[no-]object-names\n"
 "    --abbrev=<n> | --no-abbrev\n"
 "    --abbrev-commit\n"
 "    --left-right\n"
 "    --count\n"
 "  special purpose:\n"
 "    --bisect\n"
 "    --bisect-vars\n"
 "    --bisect-all"
 ;

 static struct progress *progress;
 static unsigned progress_counter;

 static struct list_objects_filter_options filter_options;
 static struct oidset omitted_objects;
 static int arg_print_omitted; /* print objects omitted by filter */

 static struct oidset missing_objects;
 enum missing_action {
 	MA_ERROR = 0,    /* fail if any missing objects are encountered */
 	MA_ALLOW_ANY,    /* silently allow ALL missing objects */
 	MA_PRINT,        /* print ALL missing objects in special section */
 	MA_ALLOW_PROMISOR, /* silently allow all missing PROMISOR objects */
 };
 static enum missing_action arg_missing_action;

 /* display only the oid of each object encountered */
 static int arg_show_object_names = 1;

 #define DEFAULT_OIDSET_SIZE     (16*1024)

 static void finish_commit(struct commit *commit);
 static void show_commit(struct commit *commit, void *data)
 {
 	struct rev_list_info *info = data;
 	struct rev_info *revs = info->revs;

 	display_progress(progress, ++progress_counter);

 	if (info->flags & REV_LIST_QUIET) {
 		finish_commit(commit);
 		return;
 	}

 	graph_show_commit(revs->graph);

 	if (revs->count) {
 		if (commit->object.flags & PATCHSAME)
 			revs->count_same++;
 		else if (commit->object.flags & SYMMETRIC_LEFT)
 			revs->count_left++;
 		else
 			revs->count_right++;
 		finish_commit(commit);
 		return;
 	}

 	if (info->show_timestamp)
 		printf("%"PRItime" ", commit->date);
 	if (info->header_prefix)
 		fputs(info->header_prefix, stdout);

 	if (!revs->graph)
 		fputs(get_revision_mark(revs, commit), stdout);
 	if (revs->abbrev_commit && revs->abbrev)
 		fputs(find_unique_abbrev(&commit->object.oid, revs->abbrev),
 		      stdout);
 	else
 		fputs(oid_to_hex(&commit->object.oid), stdout);
 	if (revs->print_parents) {
 		struct commit_list *parents = commit->parents;
 		while (parents) {
 			printf(" %s", oid_to_hex(&parents->item->object.oid));
 			parents = parents->next;
 		}
 	}
 	if (revs->children.name) {
 		struct commit_list *children;

 		children = lookup_decoration(&revs->children, &commit->object);
 		while (children) {
 			printf(" %s", oid_to_hex(&children->item->object.oid));
 			children = children->next;
 		}
 	}
 	show_decorations(revs, commit);
 	if (revs->commit_format == CMIT_FMT_ONELINE)
 		putchar(' ');
 	else
 		putchar('\n');

 	if (revs->verbose_header) {
 		struct strbuf buf = STRBUF_INIT;
 		struct pretty_print_context ctx = {0};
 		ctx.abbrev = revs->abbrev;
 		ctx.date_mode = revs->date_mode;
 		ctx.date_mode_explicit = revs->date_mode_explicit;
 		ctx.fmt = revs->commit_format;
 		ctx.output_encoding = get_log_output_encoding();
 		ctx.color = revs->diffopt.use_color;
 		pretty_print_commit(&ctx, commit, &buf);
 		if (buf.len) {
 			if (revs->commit_format != CMIT_FMT_ONELINE)
 				graph_show_oneline(revs->graph);

 			graph_show_commit_msg(revs->graph, stdout, &buf);

 			/*
 			 * Add a newline after the commit message.
 			 *
 			 * Usually, this newline produces a blank
 			 * padding line between entries, in which case
 			 * we need to add graph padding on this line.
 			 *
 			 * However, the commit message may not end in a
 			 * newline.  In this case the newline simply
 			 * ends the last line of the commit message,
 			 * and we don't need any graph output.  (This
 			 * always happens with CMIT_FMT_ONELINE, and it
 			 * happens with CMIT_FMT_USERFORMAT when the
 			 * format doesn't explicitly end in a newline.)
 			 */
 			if (buf.len && buf.buf[buf.len - 1] == '\n')
 				graph_show_padding(revs->graph);
 			putchar(info->hdr_termination);
 		} else {
 			/*
 			 * If the message buffer is empty, just show
 			 * the rest of the graph output for this
 			 * commit.
 			 */
 			if (graph_show_remainder(revs->graph))
 				putchar('\n');
 			if (revs->commit_format == CMIT_FMT_ONELINE)
 				putchar('\n');
 		}
 		strbuf_release(&buf);
 	} else {
 		if (graph_show_remainder(revs->graph))
 			putchar('\n');
 	}
 	maybe_flush_or_die(stdout, "stdout");
 	finish_commit(commit);
 }

 static void finish_commit(struct commit *commit)
 {
 	if (commit->parents) {
 		free_commit_list(commit->parents);
 		commit->parents = NULL;
 	}
 	free_commit_buffer(the_repository->parsed_objects,
 			   commit);
 }

 static inline void finish_object__ma(struct object *obj)
 {
 	/*
 	 * Whether or not we try to dynamically fetch missing objects
 	 * from the server, we currently DO NOT have the object.  We
 	 * can either print, allow (ignore), or conditionally allow
 	 * (ignore) them.
 	 */
 	switch (arg_missing_action) {
 	case MA_ERROR:
 		die("missing %s object '%s'",
 		    type_name(obj->type), oid_to_hex(&obj->oid));
 		return;

 	case MA_ALLOW_ANY:
 		return;

 	case MA_PRINT:
 		oidset_insert(&missing_objects, &obj->oid);
 		return;

 	case MA_ALLOW_PROMISOR:
 		if (is_promisor_object(&obj->oid))
 			return;
 		die("unexpected missing %s object '%s'",
 		    type_name(obj->type), oid_to_hex(&obj->oid));
 		return;

 	default:
 		BUG("unhandled missing_action");
 		return;
 	}
 }

 static int finish_object(struct object *obj, const char *name, void *cb_data)
 {
 	struct rev_list_info *info = cb_data;
 	if (oid_object_info_extended(the_repository, &obj->oid, NULL, 0) < 0) {
 		finish_object__ma(obj);
 		return 1;
 	}
 	if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
 		parse_object(the_repository, &obj->oid);
 	return 0;
 }

 static void show_object(struct object *obj, const char *name, void *cb_data)
 {
 	struct rev_list_info *info = cb_data;
 	struct rev_info *revs = info->revs;

 	if (finish_object(obj, name, cb_data))
 		return;
 	display_progress(progress, ++progress_counter);
 	if (info->flags & REV_LIST_QUIET)
 		return;

 	if (revs->count) {
 		/*
 		 * The object count is always accumulated in the .count_right
 		 * field for traversal that is not a left-right traversal,
 		 * and cmd_rev_list() made sure that a .count request that
 		 * wants to count non-commit objects, which is handled by
 		 * the show_object() callback, does not ask for .left_right.
 		 */
 		revs->count_right++;
 		return;
 	}

 	if (arg_show_object_names)
 		show_object_with_name(stdout, obj, name);
 	else
 		printf("%s\n", oid_to_hex(&obj->oid));
 }

 static void show_edge(struct commit *commit)
 {
 	printf("-%s\n", oid_to_hex(&commit->object.oid));
 }

 static void print_var_str(const char *var, const char *val)
 {
 	printf("%s='%s'\n", var, val);
 }

 static void print_var_int(const char *var, int val)
 {
 	printf("%s=%d\n", var, val);
 }

 static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
 {
 	int cnt, flags = info->flags;
 	char hex[GIT_MAX_HEXSZ + 1] = "";
 	struct commit_list *tried;
 	struct rev_info *revs = info->revs;

 	if (!revs->commits)
 		return 1;

 	revs->commits = filter_skipped(revs->commits, &tried,
 				       flags & BISECT_SHOW_ALL,
 				       NULL, NULL);

 	/*
 	 * revs->commits can reach "reaches" commits among
 	 * "all" commits.  If it is good, then there are
 	 * (all-reaches) commits left to be bisected.
 	 * On the other hand, if it is bad, then the set
 	 * to bisect is "reaches".
 	 * A bisect set of size N has (N-1) commits further
 	 * to test, as we already know one bad one.
 	 */
 	cnt = all - reaches;
 	if (cnt < reaches)
 		cnt = reaches;

 	if (revs->commits)
 		oid_to_hex_r(hex, &revs->commits->item->object.oid);

 	if (flags & BISECT_SHOW_ALL) {
 		traverse_commit_list(revs, show_commit, show_object, info);
 		printf("------\n");
 	}

 	print_var_str("bisect_rev", hex);
 	print_var_int("bisect_nr", cnt - 1);
 	print_var_int("bisect_good", all - reaches - 1);
 	print_var_int("bisect_bad", reaches - 1);
 	print_var_int("bisect_all", all);
 	print_var_int("bisect_steps", estimate_bisect_steps(all));

 	return 0;
 }

 static int show_object_fast(
 	const struct object_id *oid,
 	enum object_type type,
 	int exclude,
 	uint32_t name_hash,
 	struct packed_git *found_pack,
 	off_t found_offset)
 {
 	fprintf(stdout, "%s\n", oid_to_hex(oid));
 	return 1;
 }

 static inline int parse_missing_action_value(const char *value)
 {
 	if (!strcmp(value, "error")) {
 		arg_missing_action = MA_ERROR;
 		return 1;
 	}

 	if (!strcmp(value, "allow-any")) {
 		arg_missing_action = MA_ALLOW_ANY;
 		fetch_if_missing = 0;
 		return 1;
 	}

 	if (!strcmp(value, "print")) {
 		arg_missing_action = MA_PRINT;
 		fetch_if_missing = 0;
 		return 1;
 	}

 	if (!strcmp(value, "allow-promisor")) {
 		arg_missing_action = MA_ALLOW_PROMISOR;
 		fetch_if_missing = 0;
 		return 1;
 	}

 	return 0;
 }

 static int try_bitmap_count(struct rev_info *revs,
 			    struct list_objects_filter_options *filter)
 {
 	uint32_t commit_count = 0,
 		 tag_count = 0,
 		 tree_count = 0,
 		 blob_count = 0;
 	int max_count;
 	struct bitmap_index *bitmap_git;

 	/* This function only handles counting, not general traversal. */
 	if (!revs->count)
 		return -1;

 	/*
 	 * A bitmap result can't know left/right, etc, because we don't
 	 * actually traverse.
 	 */
 	if (revs->left_right || revs->cherry_mark)
 		return -1;

 	/*
 	 * If we're counting reachable objects, we can't handle a max count of
 	 * commits to traverse, since we don't know which objects go with which
 	 * commit.
 	 */
 	if (revs->max_count >= 0 &&
 	    (revs->tag_objects || revs->tree_objects || revs->blob_objects))
 		return -1;

 	/*
 	 * This must be saved before doing any walking, since the revision
 	 * machinery will count it down to zero while traversing.
 	 */
 	max_count = revs->max_count;

 	bitmap_git = prepare_bitmap_walk(revs, filter);
 	if (!bitmap_git)
 		return -1;

 	count_bitmap_commit_list(bitmap_git, &commit_count,
 				 revs->tree_objects ? &tree_count : NULL,
 				 revs->blob_objects ? &blob_count : NULL,
 				 revs->tag_objects ? &tag_count : NULL);
 	if (max_count >= 0 && max_count < commit_count)
 		commit_count = max_count;

 	printf("%d\n", commit_count + tree_count + blob_count + tag_count);
 	free_bitmap_index(bitmap_git);
 	return 0;
 }

 static int try_bitmap_traversal(struct rev_info *revs,
 				struct list_objects_filter_options *filter)
 {
 	struct bitmap_index *bitmap_git;

 	/*
 	 * We can't use a bitmap result with a traversal limit, since the set
 	 * of commits we'd get would be essentially random.
 	 */
 	if (revs->max_count >= 0)
 		return -1;

 	bitmap_git = prepare_bitmap_walk(revs, filter);
 	if (!bitmap_git)
 		return -1;

 	traverse_bitmap_commit_list(bitmap_git, revs, &show_object_fast);
 	free_bitmap_index(bitmap_git);
 	return 0;
 }

 int cmd_rev_list(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info revs;
 	struct rev_list_info info;
 	struct setup_revision_opt s_r_opt = {
 		.allow_exclude_promisor_objects = 1,
 	};
 	int i;
 	int bisect_list = 0;
 	int bisect_show_vars = 0;
 	int bisect_find_all = 0;
 	int use_bitmap_index = 0;
 	const char *show_progress = NULL;

 	if (argc == 2 && !strcmp(argv[1], "-h"))
 		usage(rev_list_usage);

 	git_config(git_default_config, NULL);
 	repo_init_revisions(the_repository, &revs, prefix);
 	revs.abbrev = DEFAULT_ABBREV;
 	revs.commit_format = CMIT_FMT_UNSPECIFIED;

 	/*
 	 * Scan the argument list before invoking setup_revisions(), so that we
 	 * know if fetch_if_missing needs to be set to 0.
 	 *
 	 * "--exclude-promisor-objects" acts as a pre-filter on missing objects
 	 * by not crossing the boundary from realized objects to promisor
 	 * objects.
 	 *
 	 * Let "--missing" to conditionally set fetch_if_missing.
 	 */
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i];
 		if (!strcmp(arg, "--exclude-promisor-objects")) {
 			fetch_if_missing = 0;
 			revs.exclude_promisor_objects = 1;
 			break;
 		}
 	}
 	for (i = 1; i < argc; i++) {
 		const char *arg = argv[i];
 		if (skip_prefix(arg, "--missing=", &arg)) {
 			if (revs.exclude_promisor_objects)
 				die(_("cannot combine --exclude-promisor-objects and --missing"));
 			if (parse_missing_action_value(arg))
 				break;
 		}
 	}

 	if (arg_missing_action)
 		revs.do_not_die_on_missing_tree = 1;

 	argc = setup_revisions(argc, argv, &revs, &s_r_opt);

 	memset(&info, 0, sizeof(info));
 	info.revs = &revs;
 	if (revs.bisect)
 		bisect_list = 1;

 	if (revs.diffopt.flags.quick)
 		info.flags |= REV_LIST_QUIET;
 	for (i = 1 ; i < argc; i++) {
 		const char *arg = argv[i];

 		if (!strcmp(arg, "--header")) {
 			revs.verbose_header = 1;
 			continue;
 		}
 		if (!strcmp(arg, "--timestamp")) {
 			info.show_timestamp = 1;
 			continue;
 		}
 		if (!strcmp(arg, "--bisect")) {
 			bisect_list = 1;
 			continue;
 		}
 		if (!strcmp(arg, "--bisect-all")) {
 			bisect_list = 1;
 			bisect_find_all = 1;
 			info.flags |= BISECT_SHOW_ALL;
 			revs.show_decorations = 1;
 			continue;
 		}
 		if (!strcmp(arg, "--bisect-vars")) {
 			bisect_list = 1;
 			bisect_show_vars = 1;
 			continue;
 		}
 		if (!strcmp(arg, "--use-bitmap-index")) {
 			use_bitmap_index = 1;
 			continue;
 		}
 		if (!strcmp(arg, "--test-bitmap")) {
 			test_bitmap_walk(&revs);
 			return 0;
 		}
 		if (skip_prefix(arg, "--progress=", &arg)) {
 			show_progress = arg;
 			continue;
 		}

 		if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
 			parse_list_objects_filter(&filter_options, arg);
 			if (filter_options.choice && !revs.blob_objects)
 				die(_("object filtering requires --objects"));
 			continue;
 		}
 		if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
 			list_objects_filter_set_no_filter(&filter_options);
 			continue;
 		}
 		if (!strcmp(arg, "--filter-print-omitted")) {
 			arg_print_omitted = 1;
 			continue;
 		}

 		if (!strcmp(arg, "--exclude-promisor-objects"))
 			continue; /* already handled above */
 		if (skip_prefix(arg, "--missing=", &arg))
 			continue; /* already handled above */

 		if (!strcmp(arg, ("--no-object-names"))) {
 			arg_show_object_names = 0;
 			continue;
 		}

 		if (!strcmp(arg, ("--object-names"))) {
 			arg_show_object_names = 1;
 			continue;
 		}

 		usage(rev_list_usage);

 	}
 	if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
 		/* The command line has a --pretty  */
 		info.hdr_termination = '\n';
 		if (revs.commit_format == CMIT_FMT_ONELINE)
 			info.header_prefix = "";
 		else
 			info.header_prefix = "commit ";
 	}
 	else if (revs.verbose_header)
 		/* Only --header was specified */
 		revs.commit_format = CMIT_FMT_RAW;

 	if ((!revs.commits && reflog_walk_empty(revs.reflog_info) &&
 	     (!(revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 	      !revs.pending.nr) &&
 	     !revs.rev_input_given && !revs.read_from_stdin) ||
 	    revs.diff)
 		usage(rev_list_usage);

 	if (revs.show_notes)
 		die(_("rev-list does not support display of notes"));

 	if (revs.count &&
 	    (revs.tag_objects || revs.tree_objects || revs.blob_objects) &&
 	    (revs.left_right || revs.cherry_mark))
 		die(_("marked counting is incompatible with --objects"));

 	save_commit_buffer = (revs.verbose_header ||
 			      revs.grep_filter.pattern_list ||
 			      revs.grep_filter.header_list);
 	if (bisect_list)
 		revs.limited = 1;

 	if (show_progress)
 		progress = start_delayed_progress(show_progress, 0);

 	if (use_bitmap_index) {
 		if (!try_bitmap_count(&revs, &filter_options))
 			return 0;
 		if (!try_bitmap_traversal(&revs, &filter_options))
 			return 0;
 	}

 	if (prepare_revision_walk(&revs))
 		die("revision walk setup failed");
 	if (revs.tree_objects)
 		mark_edges_uninteresting(&revs, show_edge, 0);

 	if (bisect_list) {
 		int reaches, all;
 		unsigned bisect_flags = 0;

 		if (bisect_find_all)
 			bisect_flags |= FIND_BISECTION_ALL;

 		if (revs.first_parent_only)
 			bisect_flags |= FIND_BISECTION_FIRST_PARENT_ONLY;

 		find_bisection(&revs.commits, &reaches, &all, bisect_flags);

 		if (bisect_show_vars)
 			return show_bisect_vars(&info, reaches, all);
 	}

 	if (arg_print_omitted)
 		oidset_init(&omitted_objects, DEFAULT_OIDSET_SIZE);
 	if (arg_missing_action == MA_PRINT)
 		oidset_init(&missing_objects, DEFAULT_OIDSET_SIZE);

 	traverse_commit_list_filtered(
 		&filter_options, &revs, show_commit, show_object, &info,
 		(arg_print_omitted ? &omitted_objects : NULL));

 	if (arg_print_omitted) {
 		struct oidset_iter iter;
 		struct object_id *oid;
 		oidset_iter_init(&omitted_objects, &iter);
 		while ((oid = oidset_iter_next(&iter)))
 			printf("~%s\n", oid_to_hex(oid));
 		oidset_clear(&omitted_objects);
 	}
 	if (arg_missing_action == MA_PRINT) {
 		struct oidset_iter iter;
 		struct object_id *oid;
 		oidset_iter_init(&missing_objects, &iter);
 		while ((oid = oidset_iter_next(&iter)))
 			printf("?%s\n", oid_to_hex(oid));
 		oidset_clear(&missing_objects);
 	}

 	stop_progress(&progress);

 	if (revs.count) {
 		if (revs.left_right && revs.cherry_mark)
 			printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
 		else if (revs.left_right)
 			printf("%d\t%d\n", revs.count_left, revs.count_right);
 		else if (revs.cherry_mark)
 			printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
 		else
 			printf("%d\n", revs.count_left + revs.count_right);
 	}

 	return 0;
 }
	#include "cache.h"
	#include "config.h"
	#include "commit.h"
	#include "diff.h"
	#include "revision.h"
	#include "list-objects.h"
	#include "list-objects-filter.h"
	#include "list-objects-filter-options.h"
	#include "object.h"
	#include "object-store.h"
	#include "pack.h"
	#include "pack-bitmap.h"
	#include "builtin.h"
	#include "log-tree.h"
	#include "graph.h"
	#include "bisect.h"
	#include "progress.h"
	#include "reflog-walk.h"
	#include "oidset.h"
	#include "packfile.h"

	static const char rev_list_usage[] =
	"git rev-list [OPTION] <commit-id>... [ -- paths... ]\n"
	" limiting output:\n"
	" --max-count=<n>\n"
	" --max-age=<epoch>\n"
	" --min-age=<epoch>\n"
	" --sparse\n"
	" --no-merges\n"
	" --min-parents=<n>\n"
	" --no-min-parents\n"
	" --max-parents=<n>\n"
	" --no-max-parents\n"
	" --remove-empty\n"
	" --all\n"
	" --branches\n"
	" --tags\n"
	" --remotes\n"
	" --stdin\n"
	" --quiet\n"
	" ordering output:\n"
	" --topo-order\n"
	" --date-order\n"
	" --reverse\n"
	" formatting output:\n"
	" --parents\n"
	" --children\n"
	" --objects \| --objects-edge\n"
	" --unpacked\n"
	" --header \| --pretty\n"
	" --[no-]object-names\n"
	" --abbrev=<n> \| --no-abbrev\n"
	" --abbrev-commit\n"
	" --left-right\n"
	" --count\n"
	" special purpose:\n"
	" --bisect\n"
	" --bisect-vars\n"
	" --bisect-all"
	;

	static struct progress *progress;
	static unsigned progress_counter;

	static struct list_objects_filter_options filter_options;
	static struct oidset omitted_objects;
	static int arg_print_omitted; /* print objects omitted by filter */

	static struct oidset missing_objects;
	enum missing_action {
	MA_ERROR = 0, /* fail if any missing objects are encountered */
	MA_ALLOW_ANY, /* silently allow ALL missing objects */
	MA_PRINT, /* print ALL missing objects in special section */
	MA_ALLOW_PROMISOR, /* silently allow all missing PROMISOR objects */
	};
	static enum missing_action arg_missing_action;

	/* display only the oid of each object encountered */
	static int arg_show_object_names = 1;

	#define DEFAULT_OIDSET_SIZE (16*1024)

	static void finish_commit(struct commit *commit);
	static void show_commit(struct commit commit, void data)
	{
	struct rev_list_info *info = data;
	struct rev_info *revs = info->revs;

	display_progress(progress, ++progress_counter);

	if (info->flags & REV_LIST_QUIET) {
	finish_commit(commit);
	return;
	}

	graph_show_commit(revs->graph);

	if (revs->count) {
	if (commit->object.flags & PATCHSAME)
	revs->count_same++;
	else if (commit->object.flags & SYMMETRIC_LEFT)
	revs->count_left++;
	else
	revs->count_right++;
	finish_commit(commit);
	return;
	}

	if (info->show_timestamp)
	printf("%"PRItime" ", commit->date);
	if (info->header_prefix)
	fputs(info->header_prefix, stdout);

	if (!revs->graph)
	fputs(get_revision_mark(revs, commit), stdout);
	if (revs->abbrev_commit && revs->abbrev)
	fputs(find_unique_abbrev(&commit->object.oid, revs->abbrev),
	stdout);
	else
	fputs(oid_to_hex(&commit->object.oid), stdout);
	if (revs->print_parents) {
	struct commit_list *parents = commit->parents;
	while (parents) {
	printf(" %s", oid_to_hex(&parents->item->object.oid));
	parents = parents->next;
	}
	}
	if (revs->children.name) {
	struct commit_list *children;

	children = lookup_decoration(&revs->children, &commit->object);
	while (children) {
	printf(" %s", oid_to_hex(&children->item->object.oid));
	children = children->next;
	}
	}
	show_decorations(revs, commit);
	if (revs->commit_format == CMIT_FMT_ONELINE)
	putchar(' ');
	else
	putchar('\n');

	if (revs->verbose_header) {
	struct strbuf buf = STRBUF_INIT;
	struct pretty_print_context ctx = {0};
	ctx.abbrev = revs->abbrev;
	ctx.date_mode = revs->date_mode;
	ctx.date_mode_explicit = revs->date_mode_explicit;
	ctx.fmt = revs->commit_format;
	ctx.output_encoding = get_log_output_encoding();
	ctx.color = revs->diffopt.use_color;
	pretty_print_commit(&ctx, commit, &buf);
	if (buf.len) {
	if (revs->commit_format != CMIT_FMT_ONELINE)
	graph_show_oneline(revs->graph);

	graph_show_commit_msg(revs->graph, stdout, &buf);

	/*
	* Add a newline after the commit message.
	*
	* Usually, this newline produces a blank
	* padding line between entries, in which case
	* we need to add graph padding on this line.
	*
	* However, the commit message may not end in a
	* newline. In this case the newline simply
	* ends the last line of the commit message,
	* and we don't need any graph output. (This
	* always happens with CMIT_FMT_ONELINE, and it
	* happens with CMIT_FMT_USERFORMAT when the
	* format doesn't explicitly end in a newline.)
	*/
	if (buf.len && buf.buf[buf.len - 1] == '\n')
	graph_show_padding(revs->graph);
	putchar(info->hdr_termination);
	} else {
	/*
	* If the message buffer is empty, just show
	* the rest of the graph output for this
	* commit.
	*/
	if (graph_show_remainder(revs->graph))
	putchar('\n');
	if (revs->commit_format == CMIT_FMT_ONELINE)
	putchar('\n');
	}
	strbuf_release(&buf);
	} else {
	if (graph_show_remainder(revs->graph))
	putchar('\n');
	}
	maybe_flush_or_die(stdout, "stdout");
	finish_commit(commit);
	}

	static void finish_commit(struct commit *commit)
	{
	if (commit->parents) {
	free_commit_list(commit->parents);
	commit->parents = NULL;
	}
	free_commit_buffer(the_repository->parsed_objects,
	commit);
	}

	static inline void finish_object__ma(struct object *obj)
	{
	/*
	* Whether or not we try to dynamically fetch missing objects
	* from the server, we currently DO NOT have the object. We
	* can either print, allow (ignore), or conditionally allow
	* (ignore) them.
	*/
	switch (arg_missing_action) {
	case MA_ERROR:
	die("missing %s object '%s'",
	type_name(obj->type), oid_to_hex(&obj->oid));
	return;

	case MA_ALLOW_ANY:
	return;

	case MA_PRINT:
	oidset_insert(&missing_objects, &obj->oid);
	return;

	case MA_ALLOW_PROMISOR:
	if (is_promisor_object(&obj->oid))
	return;
	die("unexpected missing %s object '%s'",
	type_name(obj->type), oid_to_hex(&obj->oid));
	return;

	default:
	BUG("unhandled missing_action");
	return;
	}
	}

	static int finish_object(struct object obj, const char name, void *cb_data)
	{
	struct rev_list_info *info = cb_data;
	if (oid_object_info_extended(the_repository, &obj->oid, NULL, 0) < 0) {
	finish_object__ma(obj);
	return 1;
	}
	if (info->revs->verify_objects && !obj->parsed && obj->type != OBJ_COMMIT)
	parse_object(the_repository, &obj->oid);
	return 0;
	}

	static void show_object(struct object obj, const char name, void *cb_data)
	{
	struct rev_list_info *info = cb_data;
	struct rev_info *revs = info->revs;

	if (finish_object(obj, name, cb_data))
	return;
	display_progress(progress, ++progress_counter);
	if (info->flags & REV_LIST_QUIET)
	return;

	if (revs->count) {
	/*
	* The object count is always accumulated in the .count_right
	* field for traversal that is not a left-right traversal,
	* and cmd_rev_list() made sure that a .count request that
	* wants to count non-commit objects, which is handled by
	* the show_object() callback, does not ask for .left_right.
	*/
	revs->count_right++;
	return;
	}

	if (arg_show_object_names)
	show_object_with_name(stdout, obj, name);
	else
	printf("%s\n", oid_to_hex(&obj->oid));
	}

	static void show_edge(struct commit *commit)
	{
	printf("-%s\n", oid_to_hex(&commit->object.oid));
	}

	static void print_var_str(const char var, const char val)
	{
	printf("%s='%s'\n", var, val);
	}

	static void print_var_int(const char *var, int val)
	{
	printf("%s=%d\n", var, val);
	}

	static int show_bisect_vars(struct rev_list_info *info, int reaches, int all)
	{
	int cnt, flags = info->flags;
	char hex[GIT_MAX_HEXSZ + 1] = "";
	struct commit_list *tried;
	struct rev_info *revs = info->revs;

	if (!revs->commits)
	return 1;

	revs->commits = filter_skipped(revs->commits, &tried,
	flags & BISECT_SHOW_ALL,
	NULL, NULL);

	/*
	* revs->commits can reach "reaches" commits among
	* "all" commits. If it is good, then there are
	* (all-reaches) commits left to be bisected.
	* On the other hand, if it is bad, then the set
	* to bisect is "reaches".
	* A bisect set of size N has (N-1) commits further
	* to test, as we already know one bad one.
	*/
	cnt = all - reaches;
	if (cnt < reaches)
	cnt = reaches;

	if (revs->commits)
	oid_to_hex_r(hex, &revs->commits->item->object.oid);

	if (flags & BISECT_SHOW_ALL) {
	traverse_commit_list(revs, show_commit, show_object, info);
	printf("------\n");
	}

	print_var_str("bisect_rev", hex);
	print_var_int("bisect_nr", cnt - 1);
	print_var_int("bisect_good", all - reaches - 1);
	print_var_int("bisect_bad", reaches - 1);
	print_var_int("bisect_all", all);
	print_var_int("bisect_steps", estimate_bisect_steps(all));

	return 0;
	}

	static int show_object_fast(
	const struct object_id *oid,
	enum object_type type,
	int exclude,
	uint32_t name_hash,
	struct packed_git *found_pack,
	off_t found_offset)
	{
	fprintf(stdout, "%s\n", oid_to_hex(oid));
	return 1;
	}

	static inline int parse_missing_action_value(const char *value)
	{
	if (!strcmp(value, "error")) {
	arg_missing_action = MA_ERROR;
	return 1;
	}

	if (!strcmp(value, "allow-any")) {
	arg_missing_action = MA_ALLOW_ANY;
	fetch_if_missing = 0;
	return 1;
	}

	if (!strcmp(value, "print")) {
	arg_missing_action = MA_PRINT;
	fetch_if_missing = 0;
	return 1;
	}

	if (!strcmp(value, "allow-promisor")) {
	arg_missing_action = MA_ALLOW_PROMISOR;
	fetch_if_missing = 0;
	return 1;
	}

	return 0;
	}

	static int try_bitmap_count(struct rev_info *revs,
	struct list_objects_filter_options *filter)
	{
	uint32_t commit_count = 0,
	tag_count = 0,
	tree_count = 0,
	blob_count = 0;
	int max_count;
	struct bitmap_index *bitmap_git;

	/* This function only handles counting, not general traversal. */
	if (!revs->count)
	return -1;

	/*
	* A bitmap result can't know left/right, etc, because we don't
	* actually traverse.
	*/
	if (revs->left_right \|\| revs->cherry_mark)
	return -1;

	/*
	* If we're counting reachable objects, we can't handle a max count of
	* commits to traverse, since we don't know which objects go with which
	* commit.
	*/
	if (revs->max_count >= 0 &&
	(revs->tag_objects \|\| revs->tree_objects \|\| revs->blob_objects))
	return -1;

	/*
	* This must be saved before doing any walking, since the revision
	* machinery will count it down to zero while traversing.
	*/
	max_count = revs->max_count;

	bitmap_git = prepare_bitmap_walk(revs, filter);
	if (!bitmap_git)
	return -1;

	count_bitmap_commit_list(bitmap_git, &commit_count,
	revs->tree_objects ? &tree_count : NULL,
	revs->blob_objects ? &blob_count : NULL,
	revs->tag_objects ? &tag_count : NULL);
	if (max_count >= 0 && max_count < commit_count)
	commit_count = max_count;

	printf("%d\n", commit_count + tree_count + blob_count + tag_count);
	free_bitmap_index(bitmap_git);
	return 0;
	}

	static int try_bitmap_traversal(struct rev_info *revs,
	struct list_objects_filter_options *filter)
	{
	struct bitmap_index *bitmap_git;

	/*
	* We can't use a bitmap result with a traversal limit, since the set
	* of commits we'd get would be essentially random.
	*/
	if (revs->max_count >= 0)
	return -1;

	bitmap_git = prepare_bitmap_walk(revs, filter);
	if (!bitmap_git)
	return -1;

	traverse_bitmap_commit_list(bitmap_git, revs, &show_object_fast);
	free_bitmap_index(bitmap_git);
	return 0;
	}

	int cmd_rev_list(int argc, const char *argv, const char prefix)
	{
	struct rev_info revs;
	struct rev_list_info info;
	struct setup_revision_opt s_r_opt = {
	.allow_exclude_promisor_objects = 1,
	};
	int i;
	int bisect_list = 0;
	int bisect_show_vars = 0;
	int bisect_find_all = 0;
	int use_bitmap_index = 0;
	const char *show_progress = NULL;

	if (argc == 2 && !strcmp(argv[1], "-h"))
	usage(rev_list_usage);

	git_config(git_default_config, NULL);
	repo_init_revisions(the_repository, &revs, prefix);
	revs.abbrev = DEFAULT_ABBREV;
	revs.commit_format = CMIT_FMT_UNSPECIFIED;

	/*
	* Scan the argument list before invoking setup_revisions(), so that we
	* know if fetch_if_missing needs to be set to 0.
	*
	* "--exclude-promisor-objects" acts as a pre-filter on missing objects
	* by not crossing the boundary from realized objects to promisor
	* objects.
	*
	* Let "--missing" to conditionally set fetch_if_missing.
	*/
	for (i = 1; i < argc; i++) {
	const char *arg = argv[i];
	if (!strcmp(arg, "--exclude-promisor-objects")) {
	fetch_if_missing = 0;
	revs.exclude_promisor_objects = 1;
	break;
	}
	}
	for (i = 1; i < argc; i++) {
	const char *arg = argv[i];
	if (skip_prefix(arg, "--missing=", &arg)) {
	if (revs.exclude_promisor_objects)
	die(_("cannot combine --exclude-promisor-objects and --missing"));
	if (parse_missing_action_value(arg))
	break;
	}
	}

	if (arg_missing_action)
	revs.do_not_die_on_missing_tree = 1;

	argc = setup_revisions(argc, argv, &revs, &s_r_opt);

	memset(&info, 0, sizeof(info));
	info.revs = &revs;
	if (revs.bisect)
	bisect_list = 1;

	if (revs.diffopt.flags.quick)
	info.flags \|= REV_LIST_QUIET;
	for (i = 1 ; i < argc; i++) {
	const char *arg = argv[i];

	if (!strcmp(arg, "--header")) {
	revs.verbose_header = 1;
	continue;
	}
	if (!strcmp(arg, "--timestamp")) {
	info.show_timestamp = 1;
	continue;
	}
	if (!strcmp(arg, "--bisect")) {
	bisect_list = 1;
	continue;
	}
	if (!strcmp(arg, "--bisect-all")) {
	bisect_list = 1;
	bisect_find_all = 1;
	info.flags \|= BISECT_SHOW_ALL;
	revs.show_decorations = 1;
	continue;
	}
	if (!strcmp(arg, "--bisect-vars")) {
	bisect_list = 1;
	bisect_show_vars = 1;
	continue;
	}
	if (!strcmp(arg, "--use-bitmap-index")) {
	use_bitmap_index = 1;
	continue;
	}
	if (!strcmp(arg, "--test-bitmap")) {
	test_bitmap_walk(&revs);
	return 0;
	}
	if (skip_prefix(arg, "--progress=", &arg)) {
	show_progress = arg;
	continue;
	}

	if (skip_prefix(arg, ("--" CL_ARG__FILTER "="), &arg)) {
	parse_list_objects_filter(&filter_options, arg);
	if (filter_options.choice && !revs.blob_objects)
	die(_("object filtering requires --objects"));
	continue;
	}
	if (!strcmp(arg, ("--no-" CL_ARG__FILTER))) {
	list_objects_filter_set_no_filter(&filter_options);
	continue;
	}
	if (!strcmp(arg, "--filter-print-omitted")) {
	arg_print_omitted = 1;
	continue;
	}

	if (!strcmp(arg, "--exclude-promisor-objects"))
	continue; /* already handled above */
	if (skip_prefix(arg, "--missing=", &arg))
	continue; /* already handled above */

	if (!strcmp(arg, ("--no-object-names"))) {
	arg_show_object_names = 0;
	continue;
	}

	if (!strcmp(arg, ("--object-names"))) {
	arg_show_object_names = 1;
	continue;
	}

	usage(rev_list_usage);

	}
	if (revs.commit_format != CMIT_FMT_UNSPECIFIED) {
	/* The command line has a --pretty */
	info.hdr_termination = '\n';
	if (revs.commit_format == CMIT_FMT_ONELINE)
	info.header_prefix = "";
	else
	info.header_prefix = "commit ";
	}
	else if (revs.verbose_header)
	/* Only --header was specified */
	revs.commit_format = CMIT_FMT_RAW;

	if ((!revs.commits && reflog_walk_empty(revs.reflog_info) &&
	(!(revs.tag_objects \|\| revs.tree_objects \|\| revs.blob_objects) &&
	!revs.pending.nr) &&
	!revs.rev_input_given && !revs.read_from_stdin) \|\|
	revs.diff)
	usage(rev_list_usage);

	if (revs.show_notes)
	die(_("rev-list does not support display of notes"));

	if (revs.count &&
	(revs.tag_objects \|\| revs.tree_objects \|\| revs.blob_objects) &&
	(revs.left_right \|\| revs.cherry_mark))
	die(_("marked counting is incompatible with --objects"));

	save_commit_buffer = (revs.verbose_header \|\|
	revs.grep_filter.pattern_list \|\|
	revs.grep_filter.header_list);
	if (bisect_list)
	revs.limited = 1;

	if (show_progress)
	progress = start_delayed_progress(show_progress, 0);

	if (use_bitmap_index) {
	if (!try_bitmap_count(&revs, &filter_options))
	return 0;
	if (!try_bitmap_traversal(&revs, &filter_options))
	return 0;
	}

	if (prepare_revision_walk(&revs))
	die("revision walk setup failed");
	if (revs.tree_objects)
	mark_edges_uninteresting(&revs, show_edge, 0);

	if (bisect_list) {
	int reaches, all;
	unsigned bisect_flags = 0;

	if (bisect_find_all)
	bisect_flags \|= FIND_BISECTION_ALL;

	if (revs.first_parent_only)
	bisect_flags \|= FIND_BISECTION_FIRST_PARENT_ONLY;

	find_bisection(&revs.commits, &reaches, &all, bisect_flags);

	if (bisect_show_vars)
	return show_bisect_vars(&info, reaches, all);
	}

	if (arg_print_omitted)
	oidset_init(&omitted_objects, DEFAULT_OIDSET_SIZE);
	if (arg_missing_action == MA_PRINT)
	oidset_init(&missing_objects, DEFAULT_OIDSET_SIZE);

	traverse_commit_list_filtered(
	&filter_options, &revs, show_commit, show_object, &info,
	(arg_print_omitted ? &omitted_objects : NULL));

	if (arg_print_omitted) {
	struct oidset_iter iter;
	struct object_id *oid;
	oidset_iter_init(&omitted_objects, &iter);
	while ((oid = oidset_iter_next(&iter)))
	printf("~%s\n", oid_to_hex(oid));
	oidset_clear(&omitted_objects);
	}
	if (arg_missing_action == MA_PRINT) {
	struct oidset_iter iter;
	struct object_id *oid;
	oidset_iter_init(&missing_objects, &iter);
	while ((oid = oidset_iter_next(&iter)))
	printf("?%s\n", oid_to_hex(oid));
	oidset_clear(&missing_objects);
	}

	stop_progress(&progress);

	if (revs.count) {
	if (revs.left_right && revs.cherry_mark)
	printf("%d\t%d\t%d\n", revs.count_left, revs.count_right, revs.count_same);
	else if (revs.left_right)
	printf("%d\t%d\n", revs.count_left, revs.count_right);
	else if (revs.cherry_mark)
	printf("%d\t%d\n", revs.count_left + revs.count_right, revs.count_same);
	else
	printf("%d\n", revs.count_left + revs.count_right);
	}

	return 0;
	}