about summary refs log blame commit diff
path: root/third_party/git/builtin/commit.c
blob: 7ba33a3bec48de4b8a7b6433df1205bde9e3ebfa (plain) (tree)
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970












































































































                                                                                  
                                                                   
                                                                                   
                                              








































































































































































































































                                                                                       



















                                                                                                  



                                              
                                                                 






                                                                   


                                                                 
                                                                           
                                                                         



                                                                                
                                                                 




















































































































































                                                                                       
                                             

























                                                                                
                                   





















































































































































































































































































































































































































                                                                                                     
                                               





























































































































































































































































                                                                                                     













































































































































































































                                                                                                              
                                            























































                                                                               

















































                                                                                                                                                                                                                  

                                                            


























































































































































                                                                                              
                                                                                






















                                                                           
/*
 * Builtin "git commit"
 *
 * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>
 * Based on git-commit.sh by Junio C Hamano and Linus Torvalds
 */

#define USE_THE_INDEX_COMPATIBILITY_MACROS
#include "cache.h"
#include "config.h"
#include "lockfile.h"
#include "cache-tree.h"
#include "color.h"
#include "dir.h"
#include "builtin.h"
#include "diff.h"
#include "diffcore.h"
#include "commit.h"
#include "revision.h"
#include "wt-status.h"
#include "run-command.h"
#include "refs.h"
#include "log-tree.h"
#include "strbuf.h"
#include "utf8.h"
#include "parse-options.h"
#include "string-list.h"
#include "rerere.h"
#include "unpack-trees.h"
#include "quote.h"
#include "submodule.h"
#include "gpg-interface.h"
#include "column.h"
#include "sequencer.h"
#include "mailmap.h"
#include "help.h"
#include "commit-reach.h"
#include "commit-graph.h"

static const char * const builtin_commit_usage[] = {
	N_("git commit [<options>] [--] <pathspec>..."),
	NULL
};

static const char * const builtin_status_usage[] = {
	N_("git status [<options>] [--] <pathspec>..."),
	NULL
};

static const char empty_amend_advice[] =
N_("You asked to amend the most recent commit, but doing so would make\n"
"it empty. You can repeat your command with --allow-empty, or you can\n"
"remove the commit entirely with \"git reset HEAD^\".\n");

static const char empty_cherry_pick_advice[] =
N_("The previous cherry-pick is now empty, possibly due to conflict resolution.\n"
"If you wish to commit it anyway, use:\n"
"\n"
"    git commit --allow-empty\n"
"\n");

static const char empty_cherry_pick_advice_single[] =
N_("Otherwise, please use 'git cherry-pick --skip'\n");

static const char empty_cherry_pick_advice_multi[] =
N_("and then use:\n"
"\n"
"    git cherry-pick --continue\n"
"\n"
"to resume cherry-picking the remaining commits.\n"
"If you wish to skip this commit, use:\n"
"\n"
"    git cherry-pick --skip\n"
"\n");

static const char *color_status_slots[] = {
	[WT_STATUS_HEADER]	  = "header",
	[WT_STATUS_UPDATED]	  = "updated",
	[WT_STATUS_CHANGED]	  = "changed",
	[WT_STATUS_UNTRACKED]	  = "untracked",
	[WT_STATUS_NOBRANCH]	  = "noBranch",
	[WT_STATUS_UNMERGED]	  = "unmerged",
	[WT_STATUS_LOCAL_BRANCH]  = "localBranch",
	[WT_STATUS_REMOTE_BRANCH] = "remoteBranch",
	[WT_STATUS_ONBRANCH]	  = "branch",
};

static const char *use_message_buffer;
static struct lock_file index_lock; /* real index */
static struct lock_file false_lock; /* used only for partial commits */
static enum {
	COMMIT_AS_IS = 1,
	COMMIT_NORMAL,
	COMMIT_PARTIAL
} commit_style;

static const char *logfile, *force_author;
static const char *template_file;
/*
 * The _message variables are commit names from which to take
 * the commit message and/or authorship.
 */
static const char *author_message, *author_message_buffer;
static char *edit_message, *use_message;
static char *fixup_message, *squash_message;
static int all, also, interactive, patch_interactive, only, amend, signoff;
static int edit_flag = -1; /* unspecified */
static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
static int config_commit_verbose = -1; /* unspecified */
static int no_post_rewrite, allow_empty_message, pathspec_file_nul;
static char *untracked_files_arg, *force_date, *ignore_submodule_arg, *ignored_arg;
static char *sign_commit, *pathspec_from_file;

/*
 * The default commit message cleanup mode will remove the lines
 * beginning with # (shell comments) and leading and trailing
 * whitespaces (empty lines or containing only whitespaces)
 * if editor is used, and only the whitespaces if the message
 * is specified explicitly.
 */
static enum commit_msg_cleanup_mode cleanup_mode;
static const char *cleanup_arg;

static enum commit_whence whence;
static int sequencer_in_use;
static int use_editor = 1, include_status = 1;
static int have_option_m;
static struct strbuf message = STRBUF_INIT;

static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;

static int opt_parse_porcelain(const struct option *opt, const char *arg, int unset)
{
	enum wt_status_format *value = (enum wt_status_format *)opt->value;
	if (unset)
		*value = STATUS_FORMAT_NONE;
	else if (!arg)
		*value = STATUS_FORMAT_PORCELAIN;
	else if (!strcmp(arg, "v1") || !strcmp(arg, "1"))
		*value = STATUS_FORMAT_PORCELAIN;
	else if (!strcmp(arg, "v2") || !strcmp(arg, "2"))
		*value = STATUS_FORMAT_PORCELAIN_V2;
	else
		die("unsupported porcelain version '%s'", arg);

	return 0;
}

static int opt_parse_m(const struct option *opt, const char *arg, int unset)
{
	struct strbuf *buf = opt->value;
	if (unset) {
		have_option_m = 0;
		strbuf_setlen(buf, 0);
	} else {
		have_option_m = 1;
		if (buf->len)
			strbuf_addch(buf, '\n');
		strbuf_addstr(buf, arg);
		strbuf_complete_line(buf);
	}
	return 0;
}

static int opt_parse_rename_score(const struct option *opt, const char *arg, int unset)
{
	const char **value = opt->value;

	BUG_ON_OPT_NEG(unset);

	if (arg != NULL && *arg == '=')
		arg = arg + 1;

	*value = arg;
	return 0;
}

static void determine_whence(struct wt_status *s)
{
	if (file_exists(git_path_merge_head(the_repository)))
		whence = FROM_MERGE;
	else if (file_exists(git_path_cherry_pick_head(the_repository))) {
		whence = FROM_CHERRY_PICK;
		if (file_exists(git_path_seq_dir()))
			sequencer_in_use = 1;
	}
	else
		whence = FROM_COMMIT;
	if (s)
		s->whence = whence;
}

static void status_init_config(struct wt_status *s, config_fn_t fn)
{
	wt_status_prepare(the_repository, s);
	init_diff_ui_defaults();
	git_config(fn, s);
	determine_whence(s);
	s->hints = advice_status_hints; /* must come after git_config() */
}

static void rollback_index_files(void)
{
	switch (commit_style) {
	case COMMIT_AS_IS:
		break; /* nothing to do */
	case COMMIT_NORMAL:
		rollback_lock_file(&index_lock);
		break;
	case COMMIT_PARTIAL:
		rollback_lock_file(&index_lock);
		rollback_lock_file(&false_lock);
		break;
	}
}

static int commit_index_files(void)
{
	int err = 0;

	switch (commit_style) {
	case COMMIT_AS_IS:
		break; /* nothing to do */
	case COMMIT_NORMAL:
		err = commit_lock_file(&index_lock);
		break;
	case COMMIT_PARTIAL:
		err = commit_lock_file(&index_lock);
		rollback_lock_file(&false_lock);
		break;
	}

	return err;
}

/*
 * Take a union of paths in the index and the named tree (typically, "HEAD"),
 * and return the paths that match the given pattern in list.
 */
static int list_paths(struct string_list *list, const char *with_tree,
		      const struct pathspec *pattern)
{
	int i, ret;
	char *m;

	if (!pattern->nr)
		return 0;

	m = xcalloc(1, pattern->nr);

	if (with_tree) {
		char *max_prefix = common_prefix(pattern);
		overlay_tree_on_index(&the_index, with_tree, max_prefix);
		free(max_prefix);
	}

	for (i = 0; i < active_nr; i++) {
		const struct cache_entry *ce = active_cache[i];
		struct string_list_item *item;

		if (ce->ce_flags & CE_UPDATE)
			continue;
		if (!ce_path_match(&the_index, ce, pattern, m))
			continue;
		item = string_list_insert(list, ce->name);
		if (ce_skip_worktree(ce))
			item->util = item; /* better a valid pointer than a fake one */
	}

	ret = report_path_error(m, pattern);
	free(m);
	return ret;
}

static void add_remove_files(struct string_list *list)
{
	int i;
	for (i = 0; i < list->nr; i++) {
		struct stat st;
		struct string_list_item *p = &(list->items[i]);

		/* p->util is skip-worktree */
		if (p->util)
			continue;

		if (!lstat(p->string, &st)) {
			if (add_to_cache(p->string, &st, 0))
				die(_("updating files failed"));
		} else
			remove_file_from_cache(p->string);
	}
}

static void create_base_index(const struct commit *current_head)
{
	struct tree *tree;
	struct unpack_trees_options opts;
	struct tree_desc t;

	if (!current_head) {
		discard_cache();
		return;
	}

	memset(&opts, 0, sizeof(opts));
	opts.head_idx = 1;
	opts.index_only = 1;
	opts.merge = 1;
	opts.src_index = &the_index;
	opts.dst_index = &the_index;

	opts.fn = oneway_merge;
	tree = parse_tree_indirect(&current_head->object.oid);
	if (!tree)
		die(_("failed to unpack HEAD tree object"));
	parse_tree(tree);
	init_tree_desc(&t, tree->buffer, tree->size);
	if (unpack_trees(1, &t, &opts))
		exit(128); /* We've already reported the error, finish dying */
}

static void refresh_cache_or_die(int refresh_flags)
{
	/*
	 * refresh_flags contains REFRESH_QUIET, so the only errors
	 * are for unmerged entries.
	 */
	if (refresh_cache(refresh_flags | REFRESH_IN_PORCELAIN))
		die_resolve_conflict("commit");
}

static const char *prepare_index(int argc, const char **argv, const char *prefix,
				 const struct commit *current_head, int is_status)
{
	struct string_list partial = STRING_LIST_INIT_DUP;
	struct pathspec pathspec;
	int refresh_flags = REFRESH_QUIET;
	const char *ret;

	if (is_status)
		refresh_flags |= REFRESH_UNMERGED;
	parse_pathspec(&pathspec, 0,
		       PATHSPEC_PREFER_FULL,
		       prefix, argv);

	if (pathspec_from_file) {
		if (interactive)
			die(_("--pathspec-from-file is incompatible with --interactive/--patch"));

		if (all)
			die(_("--pathspec-from-file with -a does not make sense"));

		if (pathspec.nr)
			die(_("--pathspec-from-file is incompatible with pathspec arguments"));

		parse_pathspec_file(&pathspec, 0,
				    PATHSPEC_PREFER_FULL,
				    prefix, pathspec_from_file, pathspec_file_nul);
	} else if (pathspec_file_nul) {
		die(_("--pathspec-file-nul requires --pathspec-from-file"));
	}

	if (!pathspec.nr && (also || (only && !amend && !allow_empty)))
		die(_("No paths with --include/--only does not make sense."));

	if (read_cache_preload(&pathspec) < 0)
		die(_("index file corrupt"));

	if (interactive) {
		char *old_index_env = NULL, *old_repo_index_file;
		hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);

		refresh_cache_or_die(refresh_flags);

		if (write_locked_index(&the_index, &index_lock, 0))
			die(_("unable to create temporary index"));

		old_repo_index_file = the_repository->index_file;
		the_repository->index_file =
			(char *)get_lock_file_path(&index_lock);
		old_index_env = xstrdup_or_null(getenv(INDEX_ENVIRONMENT));
		setenv(INDEX_ENVIRONMENT, the_repository->index_file, 1);

		if (interactive_add(argc, argv, prefix, patch_interactive) != 0)
			die(_("interactive add failed"));

		the_repository->index_file = old_repo_index_file;
		if (old_index_env && *old_index_env)
			setenv(INDEX_ENVIRONMENT, old_index_env, 1);
		else
			unsetenv(INDEX_ENVIRONMENT);
		FREE_AND_NULL(old_index_env);

		discard_cache();
		read_cache_from(get_lock_file_path(&index_lock));
		if (update_main_cache_tree(WRITE_TREE_SILENT) == 0) {
			if (reopen_lock_file(&index_lock) < 0)
				die(_("unable to write index file"));
			if (write_locked_index(&the_index, &index_lock, 0))
				die(_("unable to update temporary index"));
		} else
			warning(_("Failed to update main cache tree"));

		commit_style = COMMIT_NORMAL;
		ret = get_lock_file_path(&index_lock);
		goto out;
	}

	/*
	 * Non partial, non as-is commit.
	 *
	 * (1) get the real index;
	 * (2) update the_index as necessary;
	 * (3) write the_index out to the real index (still locked);
	 * (4) return the name of the locked index file.
	 *
	 * The caller should run hooks on the locked real index, and
	 * (A) if all goes well, commit the real index;
	 * (B) on failure, rollback the real index.
	 */
	if (all || (also && pathspec.nr)) {
		hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
		add_files_to_cache(also ? prefix : NULL, &pathspec, 0);
		refresh_cache_or_die(refresh_flags);
		update_main_cache_tree(WRITE_TREE_SILENT);
		if (write_locked_index(&the_index, &index_lock, 0))
			die(_("unable to write new_index file"));
		commit_style = COMMIT_NORMAL;
		ret = get_lock_file_path(&index_lock);
		goto out;
	}

	/*
	 * As-is commit.
	 *
	 * (1) return the name of the real index file.
	 *
	 * The caller should run hooks on the real index,
	 * and create commit from the_index.
	 * We still need to refresh the index here.
	 */
	if (!only && !pathspec.nr) {
		hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
		refresh_cache_or_die(refresh_flags);
		if (active_cache_changed
		    || !cache_tree_fully_valid(active_cache_tree))
			update_main_cache_tree(WRITE_TREE_SILENT);
		if (write_locked_index(&the_index, &index_lock,
				       COMMIT_LOCK | SKIP_IF_UNCHANGED))
			die(_("unable to write new_index file"));
		commit_style = COMMIT_AS_IS;
		ret = get_index_file();
		goto out;
	}

	/*
	 * A partial commit.
	 *
	 * (0) find the set of affected paths;
	 * (1) get lock on the real index file;
	 * (2) update the_index with the given paths;
	 * (3) write the_index out to the real index (still locked);
	 * (4) get lock on the false index file;
	 * (5) reset the_index from HEAD;
	 * (6) update the_index the same way as (2);
	 * (7) write the_index out to the false index file;
	 * (8) return the name of the false index file (still locked);
	 *
	 * The caller should run hooks on the locked false index, and
	 * create commit from it.  Then
	 * (A) if all goes well, commit the real index;
	 * (B) on failure, rollback the real index;
	 * In either case, rollback the false index.
	 */
	commit_style = COMMIT_PARTIAL;

	if (whence != FROM_COMMIT) {
		if (whence == FROM_MERGE)
			die(_("cannot do a partial commit during a merge."));
		else if (whence == FROM_CHERRY_PICK)
			die(_("cannot do a partial commit during a cherry-pick."));
	}

	if (list_paths(&partial, !current_head ? NULL : "HEAD", &pathspec))
		exit(1);

	discard_cache();
	if (read_cache() < 0)
		die(_("cannot read the index"));

	hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
	add_remove_files(&partial);
	refresh_cache(REFRESH_QUIET);
	update_main_cache_tree(WRITE_TREE_SILENT);
	if (write_locked_index(&the_index, &index_lock, 0))
		die(_("unable to write new_index file"));

	hold_lock_file_for_update(&false_lock,
				  git_path("next-index-%"PRIuMAX,
					   (uintmax_t) getpid()),
				  LOCK_DIE_ON_ERROR);

	create_base_index(current_head);
	add_remove_files(&partial);
	refresh_cache(REFRESH_QUIET);

	if (write_locked_index(&the_index, &false_lock, 0))
		die(_("unable to write temporary index file"));

	discard_cache();
	ret = get_lock_file_path(&false_lock);
	read_cache_from(ret);
out:
	string_list_clear(&partial, 0);
	clear_pathspec(&pathspec);
	return ret;
}

static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn,
		      struct wt_status *s)
{
	struct object_id oid;

	if (s->relative_paths)
		s->prefix = prefix;

	if (amend) {
		s->amend = 1;
		s->reference = "HEAD^1";
	}
	s->verbose = verbose;
	s->index_file = index_file;
	s->fp = fp;
	s->nowarn = nowarn;
	s->is_initial = get_oid(s->reference, &oid) ? 1 : 0;
	if (!s->is_initial)
		oidcpy(&s->oid_commit, &oid);
	s->status_format = status_format;
	s->ignore_submodule_arg = ignore_submodule_arg;

	wt_status_collect(s);
	wt_status_print(s);
	wt_status_collect_free_buffers(s);

	return s->committable;
}

static int is_a_merge(const struct commit *current_head)
{
	return !!(current_head->parents && current_head->parents->next);
}

static void assert_split_ident(struct ident_split *id, const struct strbuf *buf)
{
	if (split_ident_line(id, buf->buf, buf->len) || !id->date_begin)
		BUG("unable to parse our own ident: %s", buf->buf);
}

static void export_one(const char *var, const char *s, const char *e, int hack)
{
	struct strbuf buf = STRBUF_INIT;
	if (hack)
		strbuf_addch(&buf, hack);
	strbuf_add(&buf, s, e - s);
	setenv(var, buf.buf, 1);
	strbuf_release(&buf);
}

static int parse_force_date(const char *in, struct strbuf *out)
{
	strbuf_addch(out, '@');

	if (parse_date(in, out) < 0) {
		int errors = 0;
		unsigned long t = approxidate_careful(in, &errors);
		if (errors)
			return -1;
		strbuf_addf(out, "%lu", t);
	}

	return 0;
}

static void set_ident_var(char **buf, char *val)
{
	free(*buf);
	*buf = val;
}

static void determine_author_info(struct strbuf *author_ident)
{
	char *name, *email, *date;
	struct ident_split author;

	name = xstrdup_or_null(getenv("GIT_AUTHOR_NAME"));
	email = xstrdup_or_null(getenv("GIT_AUTHOR_EMAIL"));
	date = xstrdup_or_null(getenv("GIT_AUTHOR_DATE"));

	if (author_message) {
		struct ident_split ident;
		size_t len;
		const char *a;

		a = find_commit_header(author_message_buffer, "author", &len);
		if (!a)
			die(_("commit '%s' lacks author header"), author_message);
		if (split_ident_line(&ident, a, len) < 0)
			die(_("commit '%s' has malformed author line"), author_message);

		set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
		set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));

		if (ident.date_begin) {
			struct strbuf date_buf = STRBUF_INIT;
			strbuf_addch(&date_buf, '@');
			strbuf_add(&date_buf, ident.date_begin, ident.date_end - ident.date_begin);
			strbuf_addch(&date_buf, ' ');
			strbuf_add(&date_buf, ident.tz_begin, ident.tz_end - ident.tz_begin);
			set_ident_var(&date, strbuf_detach(&date_buf, NULL));
		}
	}

	if (force_author) {
		struct ident_split ident;

		if (split_ident_line(&ident, force_author, strlen(force_author)) < 0)
			die(_("malformed --author parameter"));
		set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
		set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));
	}

	if (force_date) {
		struct strbuf date_buf = STRBUF_INIT;
		if (parse_force_date(force_date, &date_buf))
			die(_("invalid date format: %s"), force_date);
		set_ident_var(&date, strbuf_detach(&date_buf, NULL));
	}

	strbuf_addstr(author_ident, fmt_ident(name, email, WANT_AUTHOR_IDENT, date,
				IDENT_STRICT));
	assert_split_ident(&author, author_ident);
	export_one("GIT_AUTHOR_NAME", author.name_begin, author.name_end, 0);
	export_one("GIT_AUTHOR_EMAIL", author.mail_begin, author.mail_end, 0);
	export_one("GIT_AUTHOR_DATE", author.date_begin, author.tz_end, '@');
	free(name);
	free(email);
	free(date);
}

static int author_date_is_interesting(void)
{
	return author_message || force_date;
}

static void adjust_comment_line_char(const struct strbuf *sb)
{
	char candidates[] = "#;@!$%^&|:";
	char *candidate;
	const char *p;

	comment_line_char = candidates[0];
	if (!memchr(sb->buf, comment_line_char, sb->len))
		return;

	p = sb->buf;
	candidate = strchr(candidates, *p);
	if (candidate)
		*candidate = ' ';
	for (p = sb->buf; *p; p++) {
		if ((p[0] == '\n' || p[0] == '\r') && p[1]) {
			candidate = strchr(candidates, p[1]);
			if (candidate)
				*candidate = ' ';
		}
	}

	for (p = candidates; *p == ' '; p++)
		;
	if (!*p)
		die(_("unable to select a comment character that is not used\n"
		      "in the current commit message"));
	comment_line_char = *p;
}

static int prepare_to_commit(const char *index_file, const char *prefix,
			     struct commit *current_head,
			     struct wt_status *s,
			     struct strbuf *author_ident)
{
	struct stat statbuf;
	struct strbuf committer_ident = STRBUF_INIT;
	int committable;
	struct strbuf sb = STRBUF_INIT;
	const char *hook_arg1 = NULL;
	const char *hook_arg2 = NULL;
	int clean_message_contents = (cleanup_mode != COMMIT_MSG_CLEANUP_NONE);
	int old_display_comment_prefix;
	int merge_contains_scissors = 0;

	/* This checks and barfs if author is badly specified */
	determine_author_info(author_ident);

	if (!no_verify && run_commit_hook(use_editor, index_file, "pre-commit", NULL))
		return 0;

	if (squash_message) {
		/*
		 * Insert the proper subject line before other commit
		 * message options add their content.
		 */
		if (use_message && !strcmp(use_message, squash_message))
			strbuf_addstr(&sb, "squash! ");
		else {
			struct pretty_print_context ctx = {0};
			struct commit *c;
			c = lookup_commit_reference_by_name(squash_message);
			if (!c)
				die(_("could not lookup commit %s"), squash_message);
			ctx.output_encoding = get_commit_output_encoding();
			format_commit_message(c, "squash! %s\n\n", &sb,
					      &ctx);
		}
	}

	if (have_option_m && !fixup_message) {
		strbuf_addbuf(&sb, &message);
		hook_arg1 = "message";
	} else if (logfile && !strcmp(logfile, "-")) {
		if (isatty(0))
			fprintf(stderr, _("(reading log message from standard input)\n"));
		if (strbuf_read(&sb, 0, 0) < 0)
			die_errno(_("could not read log from standard input"));
		hook_arg1 = "message";
	} else if (logfile) {
		if (strbuf_read_file(&sb, logfile, 0) < 0)
			die_errno(_("could not read log file '%s'"),
				  logfile);
		hook_arg1 = "message";
	} else if (use_message) {
		char *buffer;
		buffer = strstr(use_message_buffer, "\n\n");
		if (buffer)
			strbuf_addstr(&sb, skip_blank_lines(buffer + 2));
		hook_arg1 = "commit";
		hook_arg2 = use_message;
	} else if (fixup_message) {
		struct pretty_print_context ctx = {0};
		struct commit *commit;
		commit = lookup_commit_reference_by_name(fixup_message);
		if (!commit)
			die(_("could not lookup commit %s"), fixup_message);
		ctx.output_encoding = get_commit_output_encoding();
		format_commit_message(commit, "fixup! %s\n\n",
				      &sb, &ctx);
		if (have_option_m)
			strbuf_addbuf(&sb, &message);
		hook_arg1 = "message";
	} else if (!stat(git_path_merge_msg(the_repository), &statbuf)) {
		size_t merge_msg_start;

		/*
		 * prepend SQUASH_MSG here if it exists and a
		 * "merge --squash" was originally performed
		 */
		if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
			if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
				die_errno(_("could not read SQUASH_MSG"));
			hook_arg1 = "squash";
		} else
			hook_arg1 = "merge";

		merge_msg_start = sb.len;
		if (strbuf_read_file(&sb, git_path_merge_msg(the_repository), 0) < 0)
			die_errno(_("could not read MERGE_MSG"));

		if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
		    wt_status_locate_end(sb.buf + merge_msg_start,
					 sb.len - merge_msg_start) <
				sb.len - merge_msg_start)
			merge_contains_scissors = 1;
	} else if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
		if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
			die_errno(_("could not read SQUASH_MSG"));
		hook_arg1 = "squash";
	} else if (template_file) {
		if (strbuf_read_file(&sb, template_file, 0) < 0)
			die_errno(_("could not read '%s'"), template_file);
		hook_arg1 = "template";
		clean_message_contents = 0;
	}

	/*
	 * The remaining cases don't modify the template message, but
	 * just set the argument(s) to the prepare-commit-msg hook.
	 */
	else if (whence == FROM_MERGE)
		hook_arg1 = "merge";
	else if (whence == FROM_CHERRY_PICK) {
		hook_arg1 = "commit";
		hook_arg2 = "CHERRY_PICK_HEAD";
	}

	if (squash_message) {
		/*
		 * If squash_commit was used for the commit subject,
		 * then we're possibly hijacking other commit log options.
		 * Reset the hook args to tell the real story.
		 */
		hook_arg1 = "message";
		hook_arg2 = "";
	}

	s->fp = fopen_for_writing(git_path_commit_editmsg());
	if (s->fp == NULL)
		die_errno(_("could not open '%s'"), git_path_commit_editmsg());

	/* Ignore status.displayCommentPrefix: we do need comments in COMMIT_EDITMSG. */
	old_display_comment_prefix = s->display_comment_prefix;
	s->display_comment_prefix = 1;

	/*
	 * Most hints are counter-productive when the commit has
	 * already started.
	 */
	s->hints = 0;

	if (clean_message_contents)
		strbuf_stripspace(&sb, 0);

	if (signoff)
		append_signoff(&sb, ignore_non_trailer(sb.buf, sb.len), 0);

	if (fwrite(sb.buf, 1, sb.len, s->fp) < sb.len)
		die_errno(_("could not write commit template"));

	if (auto_comment_line_char)
		adjust_comment_line_char(&sb);
	strbuf_release(&sb);

	/* This checks if committer ident is explicitly given */
	strbuf_addstr(&committer_ident, git_committer_info(IDENT_STRICT));
	if (use_editor && include_status) {
		int ident_shown = 0;
		int saved_color_setting;
		struct ident_split ci, ai;

		if (whence != FROM_COMMIT) {
			if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
				!merge_contains_scissors)
				wt_status_add_cut_line(s->fp);
			status_printf_ln(s, GIT_COLOR_NORMAL,
			    whence == FROM_MERGE
				? _("\n"
					"It looks like you may be committing a merge.\n"
					"If this is not correct, please remove the file\n"
					"	%s\n"
					"and try again.\n")
				: _("\n"
					"It looks like you may be committing a cherry-pick.\n"
					"If this is not correct, please remove the file\n"
					"	%s\n"
					"and try again.\n"),
				whence == FROM_MERGE ?
					git_path_merge_head(the_repository) :
					git_path_cherry_pick_head(the_repository));
		}

		fprintf(s->fp, "\n");
		if (cleanup_mode == COMMIT_MSG_CLEANUP_ALL)
			status_printf(s, GIT_COLOR_NORMAL,
				_("Please enter the commit message for your changes."
				  " Lines starting\nwith '%c' will be ignored, and an empty"
				  " message aborts the commit.\n"), comment_line_char);
		else if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS) {
			if (whence == FROM_COMMIT && !merge_contains_scissors)
				wt_status_add_cut_line(s->fp);
		} else /* COMMIT_MSG_CLEANUP_SPACE, that is. */
			status_printf(s, GIT_COLOR_NORMAL,
				_("Please enter the commit message for your changes."
				  " Lines starting\n"
				  "with '%c' will be kept; you may remove them"
				  " yourself if you want to.\n"
				  "An empty message aborts the commit.\n"), comment_line_char);

		/*
		 * These should never fail because they come from our own
		 * fmt_ident. They may fail the sane_ident test, but we know
		 * that the name and mail pointers will at least be valid,
		 * which is enough for our tests and printing here.
		 */
		assert_split_ident(&ai, author_ident);
		assert_split_ident(&ci, &committer_ident);

		if (ident_cmp(&ai, &ci))
			status_printf_ln(s, GIT_COLOR_NORMAL,
				_("%s"
				"Author:    %.*s <%.*s>"),
				ident_shown++ ? "" : "\n",
				(int)(ai.name_end - ai.name_begin), ai.name_begin,
				(int)(ai.mail_end - ai.mail_begin), ai.mail_begin);

		if (author_date_is_interesting())
			status_printf_ln(s, GIT_COLOR_NORMAL,
				_("%s"
				"Date:      %s"),
				ident_shown++ ? "" : "\n",
				show_ident_date(&ai, DATE_MODE(NORMAL)));

		if (!committer_ident_sufficiently_given())
			status_printf_ln(s, GIT_COLOR_NORMAL,
				_("%s"
				"Committer: %.*s <%.*s>"),
				ident_shown++ ? "" : "\n",
				(int)(ci.name_end - ci.name_begin), ci.name_begin,
				(int)(ci.mail_end - ci.mail_begin), ci.mail_begin);

		status_printf_ln(s, GIT_COLOR_NORMAL, "%s", ""); /* Add new line for clarity */

		saved_color_setting = s->use_color;
		s->use_color = 0;
		committable = run_status(s->fp, index_file, prefix, 1, s);
		s->use_color = saved_color_setting;
		string_list_clear(&s->change, 1);
	} else {
		struct object_id oid;
		const char *parent = "HEAD";

		if (!active_nr && read_cache() < 0)
			die(_("Cannot read index"));

		if (amend)
			parent = "HEAD^1";

		if (get_oid(parent, &oid)) {
			int i, ita_nr = 0;

			for (i = 0; i < active_nr; i++)
				if (ce_intent_to_add(active_cache[i]))
					ita_nr++;
			committable = active_nr - ita_nr > 0;
		} else {
			/*
			 * Unless the user did explicitly request a submodule
			 * ignore mode by passing a command line option we do
			 * not ignore any changed submodule SHA-1s when
			 * comparing index and parent, no matter what is
			 * configured. Otherwise we won't commit any
			 * submodules which were manually staged, which would
			 * be really confusing.
			 */
			struct diff_flags flags = DIFF_FLAGS_INIT;
			flags.override_submodule_config = 1;
			if (ignore_submodule_arg &&
			    !strcmp(ignore_submodule_arg, "all"))
				flags.ignore_submodules = 1;
			committable = index_differs_from(the_repository,
							 parent, &flags, 1);
		}
	}
	strbuf_release(&committer_ident);

	fclose(s->fp);

	/*
	 * Reject an attempt to record a non-merge empty commit without
	 * explicit --allow-empty. In the cherry-pick case, it may be
	 * empty due to conflict resolution, which the user should okay.
	 */
	if (!committable && whence != FROM_MERGE && !allow_empty &&
	    !(amend && is_a_merge(current_head))) {
		s->hints = advice_status_hints;
		s->display_comment_prefix = old_display_comment_prefix;
		run_status(stdout, index_file, prefix, 0, s);
		if (amend)
			fputs(_(empty_amend_advice), stderr);
		else if (whence == FROM_CHERRY_PICK) {
			fputs(_(empty_cherry_pick_advice), stderr);
			if (!sequencer_in_use)
				fputs(_(empty_cherry_pick_advice_single), stderr);
			else
				fputs(_(empty_cherry_pick_advice_multi), stderr);
		}
		return 0;
	}

	if (!no_verify && find_hook("pre-commit")) {
		/*
		 * Re-read the index as pre-commit hook could have updated it,
		 * and write it out as a tree.  We must do this before we invoke
		 * the editor and after we invoke run_status above.
		 */
		discard_cache();
	}
	read_cache_from(index_file);

	if (update_main_cache_tree(0)) {
		error(_("Error building trees"));
		return 0;
	}

	if (run_commit_hook(use_editor, index_file, "prepare-commit-msg",
			    git_path_commit_editmsg(), hook_arg1, hook_arg2, NULL))
		return 0;

	if (use_editor) {
		struct argv_array env = ARGV_ARRAY_INIT;

		argv_array_pushf(&env, "GIT_INDEX_FILE=%s", index_file);
		if (launch_editor(git_path_commit_editmsg(), NULL, env.argv)) {
			fprintf(stderr,
			_("Please supply the message using either -m or -F option.\n"));
			exit(1);
		}
		argv_array_clear(&env);
	}

	if (!no_verify &&
	    run_commit_hook(use_editor, index_file, "commit-msg", git_path_commit_editmsg(), NULL)) {
		return 0;
	}

	return 1;
}

static const char *find_author_by_nickname(const char *name)
{
	struct rev_info revs;
	struct commit *commit;
	struct strbuf buf = STRBUF_INIT;
	struct string_list mailmap = STRING_LIST_INIT_NODUP;
	const char *av[20];
	int ac = 0;

	repo_init_revisions(the_repository, &revs, NULL);
	strbuf_addf(&buf, "--author=%s", name);
	av[++ac] = "--all";
	av[++ac] = "-i";
	av[++ac] = buf.buf;
	av[++ac] = NULL;
	setup_revisions(ac, av, &revs, NULL);
	revs.mailmap = &mailmap;
	read_mailmap(revs.mailmap, NULL);

	if (prepare_revision_walk(&revs))
		die(_("revision walk setup failed"));
	commit = get_revision(&revs);
	if (commit) {
		struct pretty_print_context ctx = {0};
		ctx.date_mode.type = DATE_NORMAL;
		strbuf_release(&buf);
		format_commit_message(commit, "%aN <%aE>", &buf, &ctx);
		clear_mailmap(&mailmap);
		return strbuf_detach(&buf, NULL);
	}
	die(_("--author '%s' is not 'Name <email>' and matches no existing author"), name);
}

static void handle_ignored_arg(struct wt_status *s)
{
	if (!ignored_arg)
		; /* default already initialized */
	else if (!strcmp(ignored_arg, "traditional"))
		s->show_ignored_mode = SHOW_TRADITIONAL_IGNORED;
	else if (!strcmp(ignored_arg, "no"))
		s->show_ignored_mode = SHOW_NO_IGNORED;
	else if (!strcmp(ignored_arg, "matching"))
		s->show_ignored_mode = SHOW_MATCHING_IGNORED;
	else
		die(_("Invalid ignored mode '%s'"), ignored_arg);
}

static void handle_untracked_files_arg(struct wt_status *s)
{
	if (!untracked_files_arg)
		; /* default already initialized */
	else if (!strcmp(untracked_files_arg, "no"))
		s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
	else if (!strcmp(untracked_files_arg, "normal"))
		s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
	else if (!strcmp(untracked_files_arg, "all"))
		s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
	/*
	 * Please update $__git_untracked_file_modes in
	 * git-completion.bash when you add new options
	 */
	else
		die(_("Invalid untracked files mode '%s'"), untracked_files_arg);
}

static const char *read_commit_message(const char *name)
{
	const char *out_enc;
	struct commit *commit;

	commit = lookup_commit_reference_by_name(name);
	if (!commit)
		die(_("could not lookup commit %s"), name);
	out_enc = get_commit_output_encoding();
	return logmsg_reencode(commit, NULL, out_enc);
}

/*
 * Enumerate what needs to be propagated when --porcelain
 * is not in effect here.
 */
static struct status_deferred_config {
	enum wt_status_format status_format;
	int show_branch;
	enum ahead_behind_flags ahead_behind;
} status_deferred_config = {
	STATUS_FORMAT_UNSPECIFIED,
	-1, /* unspecified */
	AHEAD_BEHIND_UNSPECIFIED,
};

static void finalize_deferred_config(struct wt_status *s)
{
	int use_deferred_config = (status_format != STATUS_FORMAT_PORCELAIN &&
				   status_format != STATUS_FORMAT_PORCELAIN_V2 &&
				   !s->null_termination);

	if (s->null_termination) {
		if (status_format == STATUS_FORMAT_NONE ||
		    status_format == STATUS_FORMAT_UNSPECIFIED)
			status_format = STATUS_FORMAT_PORCELAIN;
		else if (status_format == STATUS_FORMAT_LONG)
			die(_("--long and -z are incompatible"));
	}

	if (use_deferred_config && status_format == STATUS_FORMAT_UNSPECIFIED)
		status_format = status_deferred_config.status_format;
	if (status_format == STATUS_FORMAT_UNSPECIFIED)
		status_format = STATUS_FORMAT_NONE;

	if (use_deferred_config && s->show_branch < 0)
		s->show_branch = status_deferred_config.show_branch;
	if (s->show_branch < 0)
		s->show_branch = 0;

	/*
	 * If the user did not give a "--[no]-ahead-behind" command
	 * line argument *AND* we will print in a human-readable format
	 * (short, long etc.) then we inherit from the status.aheadbehind
	 * config setting.  In all other cases (and porcelain V[12] formats
	 * in particular), we inherit _FULL for backwards compatibility.
	 */
	if (use_deferred_config &&
	    s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
		s->ahead_behind_flags = status_deferred_config.ahead_behind;

	if (s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
		s->ahead_behind_flags = AHEAD_BEHIND_FULL;
}

static int parse_and_validate_options(int argc, const char *argv[],
				      const struct option *options,
				      const char * const usage[],
				      const char *prefix,
				      struct commit *current_head,
				      struct wt_status *s)
{
	int f = 0;

	argc = parse_options(argc, argv, prefix, options, usage, 0);
	finalize_deferred_config(s);

	if (force_author && !strchr(force_author, '>'))
		force_author = find_author_by_nickname(force_author);

	if (force_author && renew_authorship)
		die(_("Using both --reset-author and --author does not make sense"));

	if (logfile || have_option_m || use_message || fixup_message)
		use_editor = 0;
	if (0 <= edit_flag)
		use_editor = edit_flag;

	/* Sanity check options */
	if (amend && !current_head)
		die(_("You have nothing to amend."));
	if (amend && whence != FROM_COMMIT) {
		if (whence == FROM_MERGE)
			die(_("You are in the middle of a merge -- cannot amend."));
		else if (whence == FROM_CHERRY_PICK)
			die(_("You are in the middle of a cherry-pick -- cannot amend."));
	}
	if (fixup_message && squash_message)
		die(_("Options --squash and --fixup cannot be used together"));
	if (use_message)
		f++;
	if (edit_message)
		f++;
	if (fixup_message)
		f++;
	if (logfile)
		f++;
	if (f > 1)
		die(_("Only one of -c/-C/-F/--fixup can be used."));
	if (have_option_m && (edit_message || use_message || logfile))
		die((_("Option -m cannot be combined with -c/-C/-F.")));
	if (f || have_option_m)
		template_file = NULL;
	if (edit_message)
		use_message = edit_message;
	if (amend && !use_message && !fixup_message)
		use_message = "HEAD";
	if (!use_message && whence != FROM_CHERRY_PICK && renew_authorship)
		die(_("--reset-author can be used only with -C, -c or --amend."));
	if (use_message) {
		use_message_buffer = read_commit_message(use_message);
		if (!renew_authorship) {
			author_message = use_message;
			author_message_buffer = use_message_buffer;
		}
	}
	if (whence == FROM_CHERRY_PICK && !renew_authorship) {
		author_message = "CHERRY_PICK_HEAD";
		author_message_buffer = read_commit_message(author_message);
	}

	if (patch_interactive)
		interactive = 1;

	if (also + only + all + interactive > 1)
		die(_("Only one of --include/--only/--all/--interactive/--patch can be used."));
	cleanup_mode = get_cleanup_mode(cleanup_arg, use_editor);

	handle_untracked_files_arg(s);

	if (all && argc > 0)
		die(_("paths '%s ...' with -a does not make sense"),
		    argv[0]);

	if (status_format != STATUS_FORMAT_NONE)
		dry_run = 1;

	return argc;
}

static int dry_run_commit(int argc, const char **argv, const char *prefix,
			  const struct commit *current_head, struct wt_status *s)
{
	int committable;
	const char *index_file;

	index_file = prepare_index(argc, argv, prefix, current_head, 1);
	committable = run_status(stdout, index_file, prefix, 0, s);
	rollback_index_files();

	return committable ? 0 : 1;
}

define_list_config_array_extra(color_status_slots, {"added"});

static int parse_status_slot(const char *slot)
{
	if (!strcasecmp(slot, "added"))
		return WT_STATUS_UPDATED;

	return LOOKUP_CONFIG(color_status_slots, slot);
}

static int git_status_config(const char *k, const char *v, void *cb)
{
	struct wt_status *s = cb;
	const char *slot_name;

	if (starts_with(k, "column."))
		return git_column_config(k, v, "status", &s->colopts);
	if (!strcmp(k, "status.submodulesummary")) {
		int is_bool;
		s->submodule_summary = git_config_bool_or_int(k, v, &is_bool);
		if (is_bool && s->submodule_summary)
			s->submodule_summary = -1;
		return 0;
	}
	if (!strcmp(k, "status.short")) {
		if (git_config_bool(k, v))
			status_deferred_config.status_format = STATUS_FORMAT_SHORT;
		else
			status_deferred_config.status_format = STATUS_FORMAT_NONE;
		return 0;
	}
	if (!strcmp(k, "status.branch")) {
		status_deferred_config.show_branch = git_config_bool(k, v);
		return 0;
	}
	if (!strcmp(k, "status.aheadbehind")) {
		status_deferred_config.ahead_behind = git_config_bool(k, v);
		return 0;
	}
	if (!strcmp(k, "status.showstash")) {
		s->show_stash = git_config_bool(k, v);
		return 0;
	}
	if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
		s->use_color = git_config_colorbool(k, v);
		return 0;
	}
	if (!strcmp(k, "status.displaycommentprefix")) {
		s->display_comment_prefix = git_config_bool(k, v);
		return 0;
	}
	if (skip_prefix(k, "status.color.", &slot_name) ||
	    skip_prefix(k, "color.status.", &slot_name)) {
		int slot = parse_status_slot(slot_name);
		if (slot < 0)
			return 0;
		if (!v)
			return config_error_nonbool(k);
		return color_parse(v, s->color_palette[slot]);
	}
	if (!strcmp(k, "status.relativepaths")) {
		s->relative_paths = git_config_bool(k, v);
		return 0;
	}
	if (!strcmp(k, "status.showuntrackedfiles")) {
		if (!v)
			return config_error_nonbool(k);
		else if (!strcmp(v, "no"))
			s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
		else if (!strcmp(v, "normal"))
			s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
		else if (!strcmp(v, "all"))
			s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
		else
			return error(_("Invalid untracked files mode '%s'"), v);
		return 0;
	}
	if (!strcmp(k, "diff.renamelimit")) {
		if (s->rename_limit == -1)
			s->rename_limit = git_config_int(k, v);
		return 0;
	}
	if (!strcmp(k, "status.renamelimit")) {
		s->rename_limit = git_config_int(k, v);
		return 0;
	}
	if (!strcmp(k, "diff.renames")) {
		if (s->detect_rename == -1)
			s->detect_rename = git_config_rename(k, v);
		return 0;
	}
	if (!strcmp(k, "status.renames")) {
		s->detect_rename = git_config_rename(k, v);
		return 0;
	}
	return git_diff_ui_config(k, v, NULL);
}

int cmd_status(int argc, const char **argv, const char *prefix)
{
	static int no_renames = -1;
	static const char *rename_score_arg = (const char *)-1;
	static struct wt_status s;
	unsigned int progress_flag = 0;
	int fd;
	struct object_id oid;
	static struct option builtin_status_options[] = {
		OPT__VERBOSE(&verbose, N_("be verbose")),
		OPT_SET_INT('s', "short", &status_format,
			    N_("show status concisely"), STATUS_FORMAT_SHORT),
		OPT_BOOL('b', "branch", &s.show_branch,
			 N_("show branch information")),
		OPT_BOOL(0, "show-stash", &s.show_stash,
			 N_("show stash information")),
		OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
			 N_("compute full ahead/behind values")),
		{ OPTION_CALLBACK, 0, "porcelain", &status_format,
		  N_("version"), N_("machine-readable output"),
		  PARSE_OPT_OPTARG, opt_parse_porcelain },
		OPT_SET_INT(0, "long", &status_format,
			    N_("show status in long format (default)"),
			    STATUS_FORMAT_LONG),
		OPT_BOOL('z', "null", &s.null_termination,
			 N_("terminate entries with NUL")),
		{ OPTION_STRING, 'u', "untracked-files", &untracked_files_arg,
		  N_("mode"),
		  N_("show untracked files, optional modes: all, normal, no. (Default: all)"),
		  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
		{ OPTION_STRING, 0, "ignored", &ignored_arg,
		  N_("mode"),
		  N_("show ignored files, optional modes: traditional, matching, no. (Default: traditional)"),
		  PARSE_OPT_OPTARG, NULL, (intptr_t)"traditional" },
		{ OPTION_STRING, 0, "ignore-submodules", &ignore_submodule_arg, N_("when"),
		  N_("ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)"),
		  PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
		OPT_COLUMN(0, "column", &s.colopts, N_("list untracked files in columns")),
		OPT_BOOL(0, "no-renames", &no_renames, N_("do not detect renames")),
		{ OPTION_CALLBACK, 'M', "find-renames", &rename_score_arg,
		  N_("n"), N_("detect renames, optionally set similarity index"),
		  PARSE_OPT_OPTARG | PARSE_OPT_NONEG, opt_parse_rename_score },
		OPT_END(),
	};

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(builtin_status_usage, builtin_status_options);

	status_init_config(&s, git_status_config);
	argc = parse_options(argc, argv, prefix,
			     builtin_status_options,
			     builtin_status_usage, 0);
	finalize_colopts(&s.colopts, -1);
	finalize_deferred_config(&s);

	handle_untracked_files_arg(&s);
	handle_ignored_arg(&s);

	if (s.show_ignored_mode == SHOW_MATCHING_IGNORED &&
	    s.show_untracked_files == SHOW_NO_UNTRACKED_FILES)
		die(_("Unsupported combination of ignored and untracked-files arguments"));

	parse_pathspec(&s.pathspec, 0,
		       PATHSPEC_PREFER_FULL,
		       prefix, argv);

	if (status_format != STATUS_FORMAT_PORCELAIN &&
	    status_format != STATUS_FORMAT_PORCELAIN_V2)
		progress_flag = REFRESH_PROGRESS;
	repo_read_index(the_repository);
	refresh_index(&the_index,
		      REFRESH_QUIET|REFRESH_UNMERGED|progress_flag,
		      &s.pathspec, NULL, NULL);

	if (use_optional_locks())
		fd = hold_locked_index(&index_lock, 0);
	else
		fd = -1;

	s.is_initial = get_oid(s.reference, &oid) ? 1 : 0;
	if (!s.is_initial)
		oidcpy(&s.oid_commit, &oid);

	s.ignore_submodule_arg = ignore_submodule_arg;
	s.status_format = status_format;
	s.verbose = verbose;
	if (no_renames != -1)
		s.detect_rename = !no_renames;
	if ((intptr_t)rename_score_arg != -1) {
		if (s.detect_rename < DIFF_DETECT_RENAME)
			s.detect_rename = DIFF_DETECT_RENAME;
		if (rename_score_arg)
			s.rename_score = parse_rename_score(&rename_score_arg);
	}

	wt_status_collect(&s);

	if (0 <= fd)
		repo_update_index_if_able(the_repository, &index_lock);

	if (s.relative_paths)
		s.prefix = prefix;

	wt_status_print(&s);
	wt_status_collect_free_buffers(&s);

	return 0;
}

static int git_commit_config(const char *k, const char *v, void *cb)
{
	struct wt_status *s = cb;
	int status;

	if (!strcmp(k, "commit.template"))
		return git_config_pathname(&template_file, k, v);
	if (!strcmp(k, "commit.status")) {
		include_status = git_config_bool(k, v);
		return 0;
	}
	if (!strcmp(k, "commit.cleanup"))
		return git_config_string(&cleanup_arg, k, v);
	if (!strcmp(k, "commit.gpgsign")) {
		sign_commit = git_config_bool(k, v) ? "" : NULL;
		return 0;
	}
	if (!strcmp(k, "commit.verbose")) {
		int is_bool;
		config_commit_verbose = git_config_bool_or_int(k, v, &is_bool);
		return 0;
	}

	status = git_gpg_config(k, v, NULL);
	if (status)
		return status;
	return git_status_config(k, v, s);
}

int cmd_commit(int argc, const char **argv, const char *prefix)
{
	const char *argv_gc_auto[] = {"gc", "--auto", NULL};
	static struct wt_status s;
	static struct option builtin_commit_options[] = {
		OPT__QUIET(&quiet, N_("suppress summary after successful commit")),
		OPT__VERBOSE(&verbose, N_("show diff in commit message template")),

		OPT_GROUP(N_("Commit message options")),
		OPT_FILENAME('F', "file", &logfile, N_("read message from file")),
		OPT_STRING(0, "author", &force_author, N_("author"), N_("override author for commit")),
		OPT_STRING(0, "date", &force_date, N_("date"), N_("override date for commit")),
		OPT_CALLBACK('m', "message", &message, N_("message"), N_("commit message"), opt_parse_m),
		OPT_STRING('c', "reedit-message", &edit_message, N_("commit"), N_("reuse and edit message from specified commit")),
		OPT_STRING('C', "reuse-message", &use_message, N_("commit"), N_("reuse message from specified commit")),
		OPT_STRING(0, "fixup", &fixup_message, N_("commit"), N_("use autosquash formatted message to fixup specified commit")),
		OPT_STRING(0, "squash", &squash_message, N_("commit"), N_("use autosquash formatted message to squash specified commit")),
		OPT_BOOL(0, "reset-author", &renew_authorship, N_("the commit is authored by me now (used with -C/-c/--amend)")),
		OPT_BOOL('s', "signoff", &signoff, N_("add Signed-off-by:")),
		OPT_FILENAME('t', "template", &template_file, N_("use specified template file")),
		OPT_BOOL('e', "edit", &edit_flag, N_("force edit of commit")),
		OPT_CLEANUP(&cleanup_arg),
		OPT_BOOL(0, "status", &include_status, N_("include status in commit message template")),
		{ OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
		  N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
		/* end commit message options */

		OPT_GROUP(N_("Commit contents options")),
		OPT_BOOL('a', "all", &all, N_("commit all changed files")),
		OPT_BOOL('i', "include", &also, N_("add specified files to index for commit")),
		OPT_BOOL(0, "interactive", &interactive, N_("interactively add files")),
		OPT_BOOL('p', "patch", &patch_interactive, N_("interactively add changes")),
		OPT_BOOL('o', "only", &only, N_("commit only specified files")),
		OPT_BOOL('n', "no-verify", &no_verify, N_("bypass pre-commit and commit-msg hooks")),
		OPT_BOOL(0, "dry-run", &dry_run, N_("show what would be committed")),
		OPT_SET_INT(0, "short", &status_format, N_("show status concisely"),
			    STATUS_FORMAT_SHORT),
		OPT_BOOL(0, "branch", &s.show_branch, N_("show branch information")),
		OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
			 N_("compute full ahead/behind values")),
		OPT_SET_INT(0, "porcelain", &status_format,
			    N_("machine-readable output"), STATUS_FORMAT_PORCELAIN),
		OPT_SET_INT(0, "long", &status_format,
			    N_("show status in long format (default)"),
			    STATUS_FORMAT_LONG),
		OPT_BOOL('z', "null", &s.null_termination,
			 N_("terminate entries with NUL")),
		OPT_BOOL(0, "amend", &amend, N_("amend previous commit")),
		OPT_BOOL(0, "no-post-rewrite", &no_post_rewrite, N_("bypass post-rewrite hook")),
		{ OPTION_STRING, 'u', "untracked-files", &untracked_files_arg, N_("mode"), N_("show untracked files, optional modes: all, normal, no. (Default: all)"), PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
		OPT_PATHSPEC_FROM_FILE(&pathspec_from_file),
		OPT_PATHSPEC_FILE_NUL(&pathspec_file_nul),
		/* end commit contents options */

		OPT_HIDDEN_BOOL(0, "allow-empty", &allow_empty,
				N_("ok to record an empty change")),
		OPT_HIDDEN_BOOL(0, "allow-empty-message", &allow_empty_message,
				N_("ok to record a change with an empty message")),

		OPT_END()
	};

	struct strbuf sb = STRBUF_INIT;
	struct strbuf author_ident = STRBUF_INIT;
	const char *index_file, *reflog_msg;
	struct object_id oid;
	struct commit_list *parents = NULL;
	struct stat statbuf;
	struct commit *current_head = NULL;
	struct commit_extra_header *extra = NULL;
	struct strbuf err = STRBUF_INIT;

	if (argc == 2 && !strcmp(argv[1], "-h"))
		usage_with_options(builtin_commit_usage, builtin_commit_options);

	status_init_config(&s, git_commit_config);
	s.commit_template = 1;
	status_format = STATUS_FORMAT_NONE; /* Ignore status.short */
	s.colopts = 0;

	if (get_oid("HEAD", &oid))
		current_head = NULL;
	else {
		current_head = lookup_commit_or_die(&oid, "HEAD");
		if (parse_commit(current_head))
			die(_("could not parse HEAD commit"));
	}
	verbose = -1; /* unspecified */
	argc = parse_and_validate_options(argc, argv, builtin_commit_options,
					  builtin_commit_usage,
					  prefix, current_head, &s);
	if (verbose == -1)
		verbose = (config_commit_verbose < 0) ? 0 : config_commit_verbose;

	if (dry_run)
		return dry_run_commit(argc, argv, prefix, current_head, &s);
	index_file = prepare_index(argc, argv, prefix, current_head, 0);

	/* Set up everything for writing the commit object.  This includes
	   running hooks, writing the trees, and interacting with the user.  */
	if (!prepare_to_commit(index_file, prefix,
			       current_head, &s, &author_ident)) {
		rollback_index_files();
		return 1;
	}

	/* Determine parents */
	reflog_msg = getenv("GIT_REFLOG_ACTION");
	if (!current_head) {
		if (!reflog_msg)
			reflog_msg = "commit (initial)";
	} else if (amend) {
		if (!reflog_msg)
			reflog_msg = "commit (amend)";
		parents = copy_commit_list(current_head->parents);
	} else if (whence == FROM_MERGE) {
		struct strbuf m = STRBUF_INIT;
		FILE *fp;
		int allow_fast_forward = 1;
		struct commit_list **pptr = &parents;

		if (!reflog_msg)
			reflog_msg = "commit (merge)";
		pptr = commit_list_append(current_head, pptr);
		fp = xfopen(git_path_merge_head(the_repository), "r");
		while (strbuf_getline_lf(&m, fp) != EOF) {
			struct commit *parent;

			parent = get_merge_parent(m.buf);
			if (!parent)
				die(_("Corrupt MERGE_HEAD file (%s)"), m.buf);
			pptr = commit_list_append(parent, pptr);
		}
		fclose(fp);
		strbuf_release(&m);
		if (!stat(git_path_merge_mode(the_repository), &statbuf)) {
			if (strbuf_read_file(&sb, git_path_merge_mode(the_repository), 0) < 0)
				die_errno(_("could not read MERGE_MODE"));
			if (!strcmp(sb.buf, "no-ff"))
				allow_fast_forward = 0;
		}
		if (allow_fast_forward)
			reduce_heads_replace(&parents);
	} else {
		if (!reflog_msg)
			reflog_msg = (whence == FROM_CHERRY_PICK)
					? "commit (cherry-pick)"
					: "commit";
		commit_list_insert(current_head, &parents);
	}

	/* Finally, get the commit message */
	strbuf_reset(&sb);
	if (strbuf_read_file(&sb, git_path_commit_editmsg(), 0) < 0) {
		int saved_errno = errno;
		rollback_index_files();
		die(_("could not read commit message: %s"), strerror(saved_errno));
	}

	cleanup_message(&sb, cleanup_mode, verbose);

	if (message_is_empty(&sb, cleanup_mode) && !allow_empty_message) {
		rollback_index_files();
		fprintf(stderr, _("Aborting commit due to empty commit message.\n"));
		exit(1);
	}
	if (template_untouched(&sb, template_file, cleanup_mode) && !allow_empty_message) {
		rollback_index_files();
		fprintf(stderr, _("Aborting commit; you did not edit the message.\n"));
		exit(1);
	}

	if (amend) {
		const char *exclude_gpgsig[2] = { "gpgsig", NULL };
		extra = read_commit_extra_headers(current_head, exclude_gpgsig);
	} else {
		struct commit_extra_header **tail = &extra;
		append_merge_tag_headers(parents, &tail);
	}

	if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
				 parents, &oid, author_ident.buf, sign_commit,
				 extra)) {
		rollback_index_files();
		die(_("failed to write commit object"));
	}
	strbuf_release(&author_ident);
	free_commit_extra_headers(extra);

	if (update_head_with_reflog(current_head, &oid, reflog_msg, &sb,
				    &err)) {
		rollback_index_files();
		die("%s", err.buf);
	}

	sequencer_post_commit_cleanup(the_repository, 0);
	unlink(git_path_merge_head(the_repository));
	unlink(git_path_merge_msg(the_repository));
	unlink(git_path_merge_mode(the_repository));
	unlink(git_path_squash_msg(the_repository));

	if (commit_index_files())
		die(_("repository has been updated, but unable to write\n"
		      "new_index file. Check that disk is not full and quota is\n"
		      "not exceeded, and then \"git restore --staged :/\" to recover."));

	if (git_env_bool(GIT_TEST_COMMIT_GRAPH, 0) &&
	    write_commit_graph_reachable(the_repository->objects->odb, 0, NULL))
		return 1;

	repo_rerere(the_repository, 0);
	run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
	run_commit_hook(use_editor, get_index_file(), "post-commit", NULL);
	if (amend && !no_post_rewrite) {
		commit_post_rewrite(the_repository, current_head, &oid);
	}
	if (!quiet) {
		unsigned int flags = 0;

		if (!current_head)
			flags |= SUMMARY_INITIAL_COMMIT;
		if (author_date_is_interesting())
			flags |= SUMMARY_SHOW_AUTHOR_DATE;
		print_commit_summary(the_repository, prefix,
				     &oid, flags);
	}

	UNLEAK(err);
	UNLEAK(sb);
	return 0;
}