Merge branch 'hn/sleep-millisec-decl'
[git] / builtin / commit.c
1 /*
2  * Builtin "git commit"
3  *
4  * Copyright (c) 2007 Kristian Høgsberg <krh@redhat.com>
5  * Based on git-commit.sh by Junio C Hamano and Linus Torvalds
6  */
7
8 #define USE_THE_INDEX_COMPATIBILITY_MACROS
9 #include "cache.h"
10 #include "config.h"
11 #include "lockfile.h"
12 #include "cache-tree.h"
13 #include "color.h"
14 #include "dir.h"
15 #include "builtin.h"
16 #include "diff.h"
17 #include "diffcore.h"
18 #include "commit.h"
19 #include "revision.h"
20 #include "wt-status.h"
21 #include "run-command.h"
22 #include "refs.h"
23 #include "log-tree.h"
24 #include "strbuf.h"
25 #include "utf8.h"
26 #include "parse-options.h"
27 #include "string-list.h"
28 #include "rerere.h"
29 #include "unpack-trees.h"
30 #include "quote.h"
31 #include "submodule.h"
32 #include "gpg-interface.h"
33 #include "column.h"
34 #include "sequencer.h"
35 #include "mailmap.h"
36 #include "help.h"
37 #include "commit-reach.h"
38 #include "commit-graph.h"
39
40 static const char * const builtin_commit_usage[] = {
41         N_("git commit [<options>] [--] <pathspec>..."),
42         NULL
43 };
44
45 static const char * const builtin_status_usage[] = {
46         N_("git status [<options>] [--] <pathspec>..."),
47         NULL
48 };
49
50 static const char empty_amend_advice[] =
51 N_("You asked to amend the most recent commit, but doing so would make\n"
52 "it empty. You can repeat your command with --allow-empty, or you can\n"
53 "remove the commit entirely with \"git reset HEAD^\".\n");
54
55 static const char empty_cherry_pick_advice[] =
56 N_("The previous cherry-pick is now empty, possibly due to conflict resolution.\n"
57 "If you wish to commit it anyway, use:\n"
58 "\n"
59 "    git commit --allow-empty\n"
60 "\n");
61
62 static const char empty_rebase_pick_advice[] =
63 N_("Otherwise, please use 'git rebase --skip'\n");
64
65 static const char empty_cherry_pick_advice_single[] =
66 N_("Otherwise, please use 'git cherry-pick --skip'\n");
67
68 static const char empty_cherry_pick_advice_multi[] =
69 N_("and then use:\n"
70 "\n"
71 "    git cherry-pick --continue\n"
72 "\n"
73 "to resume cherry-picking the remaining commits.\n"
74 "If you wish to skip this commit, use:\n"
75 "\n"
76 "    git cherry-pick --skip\n"
77 "\n");
78
79 static const char *color_status_slots[] = {
80         [WT_STATUS_HEADER]        = "header",
81         [WT_STATUS_UPDATED]       = "updated",
82         [WT_STATUS_CHANGED]       = "changed",
83         [WT_STATUS_UNTRACKED]     = "untracked",
84         [WT_STATUS_NOBRANCH]      = "noBranch",
85         [WT_STATUS_UNMERGED]      = "unmerged",
86         [WT_STATUS_LOCAL_BRANCH]  = "localBranch",
87         [WT_STATUS_REMOTE_BRANCH] = "remoteBranch",
88         [WT_STATUS_ONBRANCH]      = "branch",
89 };
90
91 static const char *use_message_buffer;
92 static struct lock_file index_lock; /* real index */
93 static struct lock_file false_lock; /* used only for partial commits */
94 static enum {
95         COMMIT_AS_IS = 1,
96         COMMIT_NORMAL,
97         COMMIT_PARTIAL
98 } commit_style;
99
100 static const char *logfile, *force_author;
101 static const char *template_file;
102 /*
103  * The _message variables are commit names from which to take
104  * the commit message and/or authorship.
105  */
106 static const char *author_message, *author_message_buffer;
107 static char *edit_message, *use_message;
108 static char *fixup_message, *squash_message;
109 static int all, also, interactive, patch_interactive, only, amend, signoff;
110 static int edit_flag = -1; /* unspecified */
111 static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
112 static int config_commit_verbose = -1; /* unspecified */
113 static int no_post_rewrite, allow_empty_message, pathspec_file_nul;
114 static char *untracked_files_arg, *force_date, *ignore_submodule_arg, *ignored_arg;
115 static char *sign_commit, *pathspec_from_file;
116
117 /*
118  * The default commit message cleanup mode will remove the lines
119  * beginning with # (shell comments) and leading and trailing
120  * whitespaces (empty lines or containing only whitespaces)
121  * if editor is used, and only the whitespaces if the message
122  * is specified explicitly.
123  */
124 static enum commit_msg_cleanup_mode cleanup_mode;
125 static const char *cleanup_arg;
126
127 static enum commit_whence whence;
128 static int use_editor = 1, include_status = 1;
129 static int have_option_m;
130 static struct strbuf message = STRBUF_INIT;
131
132 static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;
133
134 static int opt_parse_porcelain(const struct option *opt, const char *arg, int unset)
135 {
136         enum wt_status_format *value = (enum wt_status_format *)opt->value;
137         if (unset)
138                 *value = STATUS_FORMAT_NONE;
139         else if (!arg)
140                 *value = STATUS_FORMAT_PORCELAIN;
141         else if (!strcmp(arg, "v1") || !strcmp(arg, "1"))
142                 *value = STATUS_FORMAT_PORCELAIN;
143         else if (!strcmp(arg, "v2") || !strcmp(arg, "2"))
144                 *value = STATUS_FORMAT_PORCELAIN_V2;
145         else
146                 die("unsupported porcelain version '%s'", arg);
147
148         return 0;
149 }
150
151 static int opt_parse_m(const struct option *opt, const char *arg, int unset)
152 {
153         struct strbuf *buf = opt->value;
154         if (unset) {
155                 have_option_m = 0;
156                 strbuf_setlen(buf, 0);
157         } else {
158                 have_option_m = 1;
159                 if (buf->len)
160                         strbuf_addch(buf, '\n');
161                 strbuf_addstr(buf, arg);
162                 strbuf_complete_line(buf);
163         }
164         return 0;
165 }
166
167 static int opt_parse_rename_score(const struct option *opt, const char *arg, int unset)
168 {
169         const char **value = opt->value;
170
171         BUG_ON_OPT_NEG(unset);
172
173         if (arg != NULL && *arg == '=')
174                 arg = arg + 1;
175
176         *value = arg;
177         return 0;
178 }
179
180 static void determine_whence(struct wt_status *s)
181 {
182         if (file_exists(git_path_merge_head(the_repository)))
183                 whence = FROM_MERGE;
184         else if (!sequencer_determine_whence(the_repository, &whence))
185                 whence = FROM_COMMIT;
186         if (s)
187                 s->whence = whence;
188 }
189
190 static void status_init_config(struct wt_status *s, config_fn_t fn)
191 {
192         wt_status_prepare(the_repository, s);
193         init_diff_ui_defaults();
194         git_config(fn, s);
195         determine_whence(s);
196         s->hints = advice_status_hints; /* must come after git_config() */
197 }
198
199 static void rollback_index_files(void)
200 {
201         switch (commit_style) {
202         case COMMIT_AS_IS:
203                 break; /* nothing to do */
204         case COMMIT_NORMAL:
205                 rollback_lock_file(&index_lock);
206                 break;
207         case COMMIT_PARTIAL:
208                 rollback_lock_file(&index_lock);
209                 rollback_lock_file(&false_lock);
210                 break;
211         }
212 }
213
214 static int commit_index_files(void)
215 {
216         int err = 0;
217
218         switch (commit_style) {
219         case COMMIT_AS_IS:
220                 break; /* nothing to do */
221         case COMMIT_NORMAL:
222                 err = commit_lock_file(&index_lock);
223                 break;
224         case COMMIT_PARTIAL:
225                 err = commit_lock_file(&index_lock);
226                 rollback_lock_file(&false_lock);
227                 break;
228         }
229
230         return err;
231 }
232
233 /*
234  * Take a union of paths in the index and the named tree (typically, "HEAD"),
235  * and return the paths that match the given pattern in list.
236  */
237 static int list_paths(struct string_list *list, const char *with_tree,
238                       const struct pathspec *pattern)
239 {
240         int i, ret;
241         char *m;
242
243         if (!pattern->nr)
244                 return 0;
245
246         m = xcalloc(1, pattern->nr);
247
248         if (with_tree) {
249                 char *max_prefix = common_prefix(pattern);
250                 overlay_tree_on_index(&the_index, with_tree, max_prefix);
251                 free(max_prefix);
252         }
253
254         for (i = 0; i < active_nr; i++) {
255                 const struct cache_entry *ce = active_cache[i];
256                 struct string_list_item *item;
257
258                 if (ce->ce_flags & CE_UPDATE)
259                         continue;
260                 if (!ce_path_match(&the_index, ce, pattern, m))
261                         continue;
262                 item = string_list_insert(list, ce->name);
263                 if (ce_skip_worktree(ce))
264                         item->util = item; /* better a valid pointer than a fake one */
265         }
266
267         ret = report_path_error(m, pattern);
268         free(m);
269         return ret;
270 }
271
272 static void add_remove_files(struct string_list *list)
273 {
274         int i;
275         for (i = 0; i < list->nr; i++) {
276                 struct stat st;
277                 struct string_list_item *p = &(list->items[i]);
278
279                 /* p->util is skip-worktree */
280                 if (p->util)
281                         continue;
282
283                 if (!lstat(p->string, &st)) {
284                         if (add_to_cache(p->string, &st, 0))
285                                 die(_("updating files failed"));
286                 } else
287                         remove_file_from_cache(p->string);
288         }
289 }
290
291 static void create_base_index(const struct commit *current_head)
292 {
293         struct tree *tree;
294         struct unpack_trees_options opts;
295         struct tree_desc t;
296
297         if (!current_head) {
298                 discard_cache();
299                 return;
300         }
301
302         memset(&opts, 0, sizeof(opts));
303         opts.head_idx = 1;
304         opts.index_only = 1;
305         opts.merge = 1;
306         opts.src_index = &the_index;
307         opts.dst_index = &the_index;
308
309         opts.fn = oneway_merge;
310         tree = parse_tree_indirect(&current_head->object.oid);
311         if (!tree)
312                 die(_("failed to unpack HEAD tree object"));
313         parse_tree(tree);
314         init_tree_desc(&t, tree->buffer, tree->size);
315         if (unpack_trees(1, &t, &opts))
316                 exit(128); /* We've already reported the error, finish dying */
317 }
318
319 static void refresh_cache_or_die(int refresh_flags)
320 {
321         /*
322          * refresh_flags contains REFRESH_QUIET, so the only errors
323          * are for unmerged entries.
324          */
325         if (refresh_cache(refresh_flags | REFRESH_IN_PORCELAIN))
326                 die_resolve_conflict("commit");
327 }
328
329 static const char *prepare_index(const char **argv, const char *prefix,
330                                  const struct commit *current_head, int is_status)
331 {
332         struct string_list partial = STRING_LIST_INIT_DUP;
333         struct pathspec pathspec;
334         int refresh_flags = REFRESH_QUIET;
335         const char *ret;
336
337         if (is_status)
338                 refresh_flags |= REFRESH_UNMERGED;
339         parse_pathspec(&pathspec, 0,
340                        PATHSPEC_PREFER_FULL,
341                        prefix, argv);
342
343         if (pathspec_from_file) {
344                 if (interactive)
345                         die(_("--pathspec-from-file is incompatible with --interactive/--patch"));
346
347                 if (all)
348                         die(_("--pathspec-from-file with -a does not make sense"));
349
350                 if (pathspec.nr)
351                         die(_("--pathspec-from-file is incompatible with pathspec arguments"));
352
353                 parse_pathspec_file(&pathspec, 0,
354                                     PATHSPEC_PREFER_FULL,
355                                     prefix, pathspec_from_file, pathspec_file_nul);
356         } else if (pathspec_file_nul) {
357                 die(_("--pathspec-file-nul requires --pathspec-from-file"));
358         }
359
360         if (!pathspec.nr && (also || (only && !amend && !allow_empty)))
361                 die(_("No paths with --include/--only does not make sense."));
362
363         if (read_cache_preload(&pathspec) < 0)
364                 die(_("index file corrupt"));
365
366         if (interactive) {
367                 char *old_index_env = NULL, *old_repo_index_file;
368                 hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
369
370                 refresh_cache_or_die(refresh_flags);
371
372                 if (write_locked_index(&the_index, &index_lock, 0))
373                         die(_("unable to create temporary index"));
374
375                 old_repo_index_file = the_repository->index_file;
376                 the_repository->index_file =
377                         (char *)get_lock_file_path(&index_lock);
378                 old_index_env = xstrdup_or_null(getenv(INDEX_ENVIRONMENT));
379                 setenv(INDEX_ENVIRONMENT, the_repository->index_file, 1);
380
381                 if (interactive_add(argv, prefix, patch_interactive) != 0)
382                         die(_("interactive add failed"));
383
384                 the_repository->index_file = old_repo_index_file;
385                 if (old_index_env && *old_index_env)
386                         setenv(INDEX_ENVIRONMENT, old_index_env, 1);
387                 else
388                         unsetenv(INDEX_ENVIRONMENT);
389                 FREE_AND_NULL(old_index_env);
390
391                 discard_cache();
392                 read_cache_from(get_lock_file_path(&index_lock));
393                 if (update_main_cache_tree(WRITE_TREE_SILENT) == 0) {
394                         if (reopen_lock_file(&index_lock) < 0)
395                                 die(_("unable to write index file"));
396                         if (write_locked_index(&the_index, &index_lock, 0))
397                                 die(_("unable to update temporary index"));
398                 } else
399                         warning(_("Failed to update main cache tree"));
400
401                 commit_style = COMMIT_NORMAL;
402                 ret = get_lock_file_path(&index_lock);
403                 goto out;
404         }
405
406         /*
407          * Non partial, non as-is commit.
408          *
409          * (1) get the real index;
410          * (2) update the_index as necessary;
411          * (3) write the_index out to the real index (still locked);
412          * (4) return the name of the locked index file.
413          *
414          * The caller should run hooks on the locked real index, and
415          * (A) if all goes well, commit the real index;
416          * (B) on failure, rollback the real index.
417          */
418         if (all || (also && pathspec.nr)) {
419                 hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
420                 add_files_to_cache(also ? prefix : NULL, &pathspec, 0);
421                 refresh_cache_or_die(refresh_flags);
422                 update_main_cache_tree(WRITE_TREE_SILENT);
423                 if (write_locked_index(&the_index, &index_lock, 0))
424                         die(_("unable to write new_index file"));
425                 commit_style = COMMIT_NORMAL;
426                 ret = get_lock_file_path(&index_lock);
427                 goto out;
428         }
429
430         /*
431          * As-is commit.
432          *
433          * (1) return the name of the real index file.
434          *
435          * The caller should run hooks on the real index,
436          * and create commit from the_index.
437          * We still need to refresh the index here.
438          */
439         if (!only && !pathspec.nr) {
440                 hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
441                 refresh_cache_or_die(refresh_flags);
442                 if (active_cache_changed
443                     || !cache_tree_fully_valid(active_cache_tree))
444                         update_main_cache_tree(WRITE_TREE_SILENT);
445                 if (write_locked_index(&the_index, &index_lock,
446                                        COMMIT_LOCK | SKIP_IF_UNCHANGED))
447                         die(_("unable to write new_index file"));
448                 commit_style = COMMIT_AS_IS;
449                 ret = get_index_file();
450                 goto out;
451         }
452
453         /*
454          * A partial commit.
455          *
456          * (0) find the set of affected paths;
457          * (1) get lock on the real index file;
458          * (2) update the_index with the given paths;
459          * (3) write the_index out to the real index (still locked);
460          * (4) get lock on the false index file;
461          * (5) reset the_index from HEAD;
462          * (6) update the_index the same way as (2);
463          * (7) write the_index out to the false index file;
464          * (8) return the name of the false index file (still locked);
465          *
466          * The caller should run hooks on the locked false index, and
467          * create commit from it.  Then
468          * (A) if all goes well, commit the real index;
469          * (B) on failure, rollback the real index;
470          * In either case, rollback the false index.
471          */
472         commit_style = COMMIT_PARTIAL;
473
474         if (whence != FROM_COMMIT) {
475                 if (whence == FROM_MERGE)
476                         die(_("cannot do a partial commit during a merge."));
477                 else if (is_from_cherry_pick(whence))
478                         die(_("cannot do a partial commit during a cherry-pick."));
479                 else if (is_from_rebase(whence))
480                         die(_("cannot do a partial commit during a rebase."));
481         }
482
483         if (list_paths(&partial, !current_head ? NULL : "HEAD", &pathspec))
484                 exit(1);
485
486         discard_cache();
487         if (read_cache() < 0)
488                 die(_("cannot read the index"));
489
490         hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
491         add_remove_files(&partial);
492         refresh_cache(REFRESH_QUIET);
493         update_main_cache_tree(WRITE_TREE_SILENT);
494         if (write_locked_index(&the_index, &index_lock, 0))
495                 die(_("unable to write new_index file"));
496
497         hold_lock_file_for_update(&false_lock,
498                                   git_path("next-index-%"PRIuMAX,
499                                            (uintmax_t) getpid()),
500                                   LOCK_DIE_ON_ERROR);
501
502         create_base_index(current_head);
503         add_remove_files(&partial);
504         refresh_cache(REFRESH_QUIET);
505
506         if (write_locked_index(&the_index, &false_lock, 0))
507                 die(_("unable to write temporary index file"));
508
509         discard_cache();
510         ret = get_lock_file_path(&false_lock);
511         read_cache_from(ret);
512 out:
513         string_list_clear(&partial, 0);
514         clear_pathspec(&pathspec);
515         return ret;
516 }
517
518 static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn,
519                       struct wt_status *s)
520 {
521         struct object_id oid;
522
523         if (s->relative_paths)
524                 s->prefix = prefix;
525
526         if (amend) {
527                 s->amend = 1;
528                 s->reference = "HEAD^1";
529         }
530         s->verbose = verbose;
531         s->index_file = index_file;
532         s->fp = fp;
533         s->nowarn = nowarn;
534         s->is_initial = get_oid(s->reference, &oid) ? 1 : 0;
535         if (!s->is_initial)
536                 oidcpy(&s->oid_commit, &oid);
537         s->status_format = status_format;
538         s->ignore_submodule_arg = ignore_submodule_arg;
539
540         wt_status_collect(s);
541         wt_status_print(s);
542         wt_status_collect_free_buffers(s);
543
544         return s->committable;
545 }
546
547 static int is_a_merge(const struct commit *current_head)
548 {
549         return !!(current_head->parents && current_head->parents->next);
550 }
551
552 static void assert_split_ident(struct ident_split *id, const struct strbuf *buf)
553 {
554         if (split_ident_line(id, buf->buf, buf->len) || !id->date_begin)
555                 BUG("unable to parse our own ident: %s", buf->buf);
556 }
557
558 static void export_one(const char *var, const char *s, const char *e, int hack)
559 {
560         struct strbuf buf = STRBUF_INIT;
561         if (hack)
562                 strbuf_addch(&buf, hack);
563         strbuf_add(&buf, s, e - s);
564         setenv(var, buf.buf, 1);
565         strbuf_release(&buf);
566 }
567
568 static int parse_force_date(const char *in, struct strbuf *out)
569 {
570         strbuf_addch(out, '@');
571
572         if (parse_date(in, out) < 0) {
573                 int errors = 0;
574                 unsigned long t = approxidate_careful(in, &errors);
575                 if (errors)
576                         return -1;
577                 strbuf_addf(out, "%lu", t);
578         }
579
580         return 0;
581 }
582
583 static void set_ident_var(char **buf, char *val)
584 {
585         free(*buf);
586         *buf = val;
587 }
588
589 static void determine_author_info(struct strbuf *author_ident)
590 {
591         char *name, *email, *date;
592         struct ident_split author;
593
594         name = xstrdup_or_null(getenv("GIT_AUTHOR_NAME"));
595         email = xstrdup_or_null(getenv("GIT_AUTHOR_EMAIL"));
596         date = xstrdup_or_null(getenv("GIT_AUTHOR_DATE"));
597
598         if (author_message) {
599                 struct ident_split ident;
600                 size_t len;
601                 const char *a;
602
603                 a = find_commit_header(author_message_buffer, "author", &len);
604                 if (!a)
605                         die(_("commit '%s' lacks author header"), author_message);
606                 if (split_ident_line(&ident, a, len) < 0)
607                         die(_("commit '%s' has malformed author line"), author_message);
608
609                 set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
610                 set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));
611
612                 if (ident.date_begin) {
613                         struct strbuf date_buf = STRBUF_INIT;
614                         strbuf_addch(&date_buf, '@');
615                         strbuf_add(&date_buf, ident.date_begin, ident.date_end - ident.date_begin);
616                         strbuf_addch(&date_buf, ' ');
617                         strbuf_add(&date_buf, ident.tz_begin, ident.tz_end - ident.tz_begin);
618                         set_ident_var(&date, strbuf_detach(&date_buf, NULL));
619                 }
620         }
621
622         if (force_author) {
623                 struct ident_split ident;
624
625                 if (split_ident_line(&ident, force_author, strlen(force_author)) < 0)
626                         die(_("malformed --author parameter"));
627                 set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
628                 set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));
629         }
630
631         if (force_date) {
632                 struct strbuf date_buf = STRBUF_INIT;
633                 if (parse_force_date(force_date, &date_buf))
634                         die(_("invalid date format: %s"), force_date);
635                 set_ident_var(&date, strbuf_detach(&date_buf, NULL));
636         }
637
638         strbuf_addstr(author_ident, fmt_ident(name, email, WANT_AUTHOR_IDENT, date,
639                                 IDENT_STRICT));
640         assert_split_ident(&author, author_ident);
641         export_one("GIT_AUTHOR_NAME", author.name_begin, author.name_end, 0);
642         export_one("GIT_AUTHOR_EMAIL", author.mail_begin, author.mail_end, 0);
643         export_one("GIT_AUTHOR_DATE", author.date_begin, author.tz_end, '@');
644         free(name);
645         free(email);
646         free(date);
647 }
648
649 static int author_date_is_interesting(void)
650 {
651         return author_message || force_date;
652 }
653
654 static void adjust_comment_line_char(const struct strbuf *sb)
655 {
656         char candidates[] = "#;@!$%^&|:";
657         char *candidate;
658         const char *p;
659
660         comment_line_char = candidates[0];
661         if (!memchr(sb->buf, comment_line_char, sb->len))
662                 return;
663
664         p = sb->buf;
665         candidate = strchr(candidates, *p);
666         if (candidate)
667                 *candidate = ' ';
668         for (p = sb->buf; *p; p++) {
669                 if ((p[0] == '\n' || p[0] == '\r') && p[1]) {
670                         candidate = strchr(candidates, p[1]);
671                         if (candidate)
672                                 *candidate = ' ';
673                 }
674         }
675
676         for (p = candidates; *p == ' '; p++)
677                 ;
678         if (!*p)
679                 die(_("unable to select a comment character that is not used\n"
680                       "in the current commit message"));
681         comment_line_char = *p;
682 }
683
684 static int prepare_to_commit(const char *index_file, const char *prefix,
685                              struct commit *current_head,
686                              struct wt_status *s,
687                              struct strbuf *author_ident)
688 {
689         struct stat statbuf;
690         struct strbuf committer_ident = STRBUF_INIT;
691         int committable;
692         struct strbuf sb = STRBUF_INIT;
693         const char *hook_arg1 = NULL;
694         const char *hook_arg2 = NULL;
695         int clean_message_contents = (cleanup_mode != COMMIT_MSG_CLEANUP_NONE);
696         int old_display_comment_prefix;
697         int merge_contains_scissors = 0;
698
699         /* This checks and barfs if author is badly specified */
700         determine_author_info(author_ident);
701
702         if (!no_verify && run_commit_hook(use_editor, index_file, "pre-commit", NULL))
703                 return 0;
704
705         if (squash_message) {
706                 /*
707                  * Insert the proper subject line before other commit
708                  * message options add their content.
709                  */
710                 if (use_message && !strcmp(use_message, squash_message))
711                         strbuf_addstr(&sb, "squash! ");
712                 else {
713                         struct pretty_print_context ctx = {0};
714                         struct commit *c;
715                         c = lookup_commit_reference_by_name(squash_message);
716                         if (!c)
717                                 die(_("could not lookup commit %s"), squash_message);
718                         ctx.output_encoding = get_commit_output_encoding();
719                         format_commit_message(c, "squash! %s\n\n", &sb,
720                                               &ctx);
721                 }
722         }
723
724         if (have_option_m && !fixup_message) {
725                 strbuf_addbuf(&sb, &message);
726                 hook_arg1 = "message";
727         } else if (logfile && !strcmp(logfile, "-")) {
728                 if (isatty(0))
729                         fprintf(stderr, _("(reading log message from standard input)\n"));
730                 if (strbuf_read(&sb, 0, 0) < 0)
731                         die_errno(_("could not read log from standard input"));
732                 hook_arg1 = "message";
733         } else if (logfile) {
734                 if (strbuf_read_file(&sb, logfile, 0) < 0)
735                         die_errno(_("could not read log file '%s'"),
736                                   logfile);
737                 hook_arg1 = "message";
738         } else if (use_message) {
739                 char *buffer;
740                 buffer = strstr(use_message_buffer, "\n\n");
741                 if (buffer)
742                         strbuf_addstr(&sb, skip_blank_lines(buffer + 2));
743                 hook_arg1 = "commit";
744                 hook_arg2 = use_message;
745         } else if (fixup_message) {
746                 struct pretty_print_context ctx = {0};
747                 struct commit *commit;
748                 commit = lookup_commit_reference_by_name(fixup_message);
749                 if (!commit)
750                         die(_("could not lookup commit %s"), fixup_message);
751                 ctx.output_encoding = get_commit_output_encoding();
752                 format_commit_message(commit, "fixup! %s\n\n",
753                                       &sb, &ctx);
754                 if (have_option_m)
755                         strbuf_addbuf(&sb, &message);
756                 hook_arg1 = "message";
757         } else if (!stat(git_path_merge_msg(the_repository), &statbuf)) {
758                 size_t merge_msg_start;
759
760                 /*
761                  * prepend SQUASH_MSG here if it exists and a
762                  * "merge --squash" was originally performed
763                  */
764                 if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
765                         if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
766                                 die_errno(_("could not read SQUASH_MSG"));
767                         hook_arg1 = "squash";
768                 } else
769                         hook_arg1 = "merge";
770
771                 merge_msg_start = sb.len;
772                 if (strbuf_read_file(&sb, git_path_merge_msg(the_repository), 0) < 0)
773                         die_errno(_("could not read MERGE_MSG"));
774
775                 if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
776                     wt_status_locate_end(sb.buf + merge_msg_start,
777                                          sb.len - merge_msg_start) <
778                                 sb.len - merge_msg_start)
779                         merge_contains_scissors = 1;
780         } else if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
781                 if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
782                         die_errno(_("could not read SQUASH_MSG"));
783                 hook_arg1 = "squash";
784         } else if (template_file) {
785                 if (strbuf_read_file(&sb, template_file, 0) < 0)
786                         die_errno(_("could not read '%s'"), template_file);
787                 hook_arg1 = "template";
788                 clean_message_contents = 0;
789         }
790
791         /*
792          * The remaining cases don't modify the template message, but
793          * just set the argument(s) to the prepare-commit-msg hook.
794          */
795         else if (whence == FROM_MERGE)
796                 hook_arg1 = "merge";
797         else if (is_from_cherry_pick(whence) || whence == FROM_REBASE_PICK) {
798                 hook_arg1 = "commit";
799                 hook_arg2 = "CHERRY_PICK_HEAD";
800         }
801
802         if (squash_message) {
803                 /*
804                  * If squash_commit was used for the commit subject,
805                  * then we're possibly hijacking other commit log options.
806                  * Reset the hook args to tell the real story.
807                  */
808                 hook_arg1 = "message";
809                 hook_arg2 = "";
810         }
811
812         s->fp = fopen_for_writing(git_path_commit_editmsg());
813         if (s->fp == NULL)
814                 die_errno(_("could not open '%s'"), git_path_commit_editmsg());
815
816         /* Ignore status.displayCommentPrefix: we do need comments in COMMIT_EDITMSG. */
817         old_display_comment_prefix = s->display_comment_prefix;
818         s->display_comment_prefix = 1;
819
820         /*
821          * Most hints are counter-productive when the commit has
822          * already started.
823          */
824         s->hints = 0;
825
826         if (clean_message_contents)
827                 strbuf_stripspace(&sb, 0);
828
829         if (signoff)
830                 append_signoff(&sb, ignore_non_trailer(sb.buf, sb.len), 0);
831
832         if (fwrite(sb.buf, 1, sb.len, s->fp) < sb.len)
833                 die_errno(_("could not write commit template"));
834
835         if (auto_comment_line_char)
836                 adjust_comment_line_char(&sb);
837         strbuf_release(&sb);
838
839         /* This checks if committer ident is explicitly given */
840         strbuf_addstr(&committer_ident, git_committer_info(IDENT_STRICT));
841         if (use_editor && include_status) {
842                 int ident_shown = 0;
843                 int saved_color_setting;
844                 struct ident_split ci, ai;
845
846                 if (whence != FROM_COMMIT) {
847                         if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
848                                 !merge_contains_scissors)
849                                 wt_status_add_cut_line(s->fp);
850                         status_printf_ln(
851                                 s, GIT_COLOR_NORMAL,
852                                 whence == FROM_MERGE ?
853                                               _("\n"
854                                           "It looks like you may be committing a merge.\n"
855                                           "If this is not correct, please run\n"
856                                           "     git update-ref -d MERGE_HEAD\n"
857                                           "and try again.\n") :
858                                               _("\n"
859                                           "It looks like you may be committing a cherry-pick.\n"
860                                           "If this is not correct, please run\n"
861                                           "     git update-ref -d CHERRY_PICK_HEAD\n"
862                                           "and try again.\n"));
863                 }
864
865                 fprintf(s->fp, "\n");
866                 if (cleanup_mode == COMMIT_MSG_CLEANUP_ALL)
867                         status_printf(s, GIT_COLOR_NORMAL,
868                                 _("Please enter the commit message for your changes."
869                                   " Lines starting\nwith '%c' will be ignored, and an empty"
870                                   " message aborts the commit.\n"), comment_line_char);
871                 else if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS) {
872                         if (whence == FROM_COMMIT && !merge_contains_scissors)
873                                 wt_status_add_cut_line(s->fp);
874                 } else /* COMMIT_MSG_CLEANUP_SPACE, that is. */
875                         status_printf(s, GIT_COLOR_NORMAL,
876                                 _("Please enter the commit message for your changes."
877                                   " Lines starting\n"
878                                   "with '%c' will be kept; you may remove them"
879                                   " yourself if you want to.\n"
880                                   "An empty message aborts the commit.\n"), comment_line_char);
881
882                 /*
883                  * These should never fail because they come from our own
884                  * fmt_ident. They may fail the sane_ident test, but we know
885                  * that the name and mail pointers will at least be valid,
886                  * which is enough for our tests and printing here.
887                  */
888                 assert_split_ident(&ai, author_ident);
889                 assert_split_ident(&ci, &committer_ident);
890
891                 if (ident_cmp(&ai, &ci))
892                         status_printf_ln(s, GIT_COLOR_NORMAL,
893                                 _("%s"
894                                 "Author:    %.*s <%.*s>"),
895                                 ident_shown++ ? "" : "\n",
896                                 (int)(ai.name_end - ai.name_begin), ai.name_begin,
897                                 (int)(ai.mail_end - ai.mail_begin), ai.mail_begin);
898
899                 if (author_date_is_interesting())
900                         status_printf_ln(s, GIT_COLOR_NORMAL,
901                                 _("%s"
902                                 "Date:      %s"),
903                                 ident_shown++ ? "" : "\n",
904                                 show_ident_date(&ai, DATE_MODE(NORMAL)));
905
906                 if (!committer_ident_sufficiently_given())
907                         status_printf_ln(s, GIT_COLOR_NORMAL,
908                                 _("%s"
909                                 "Committer: %.*s <%.*s>"),
910                                 ident_shown++ ? "" : "\n",
911                                 (int)(ci.name_end - ci.name_begin), ci.name_begin,
912                                 (int)(ci.mail_end - ci.mail_begin), ci.mail_begin);
913
914                 status_printf_ln(s, GIT_COLOR_NORMAL, "%s", ""); /* Add new line for clarity */
915
916                 saved_color_setting = s->use_color;
917                 s->use_color = 0;
918                 committable = run_status(s->fp, index_file, prefix, 1, s);
919                 s->use_color = saved_color_setting;
920                 string_list_clear(&s->change, 1);
921         } else {
922                 struct object_id oid;
923                 const char *parent = "HEAD";
924
925                 if (!active_nr && read_cache() < 0)
926                         die(_("Cannot read index"));
927
928                 if (amend)
929                         parent = "HEAD^1";
930
931                 if (get_oid(parent, &oid)) {
932                         int i, ita_nr = 0;
933
934                         for (i = 0; i < active_nr; i++)
935                                 if (ce_intent_to_add(active_cache[i]))
936                                         ita_nr++;
937                         committable = active_nr - ita_nr > 0;
938                 } else {
939                         /*
940                          * Unless the user did explicitly request a submodule
941                          * ignore mode by passing a command line option we do
942                          * not ignore any changed submodule SHA-1s when
943                          * comparing index and parent, no matter what is
944                          * configured. Otherwise we won't commit any
945                          * submodules which were manually staged, which would
946                          * be really confusing.
947                          */
948                         struct diff_flags flags = DIFF_FLAGS_INIT;
949                         flags.override_submodule_config = 1;
950                         if (ignore_submodule_arg &&
951                             !strcmp(ignore_submodule_arg, "all"))
952                                 flags.ignore_submodules = 1;
953                         committable = index_differs_from(the_repository,
954                                                          parent, &flags, 1);
955                 }
956         }
957         strbuf_release(&committer_ident);
958
959         fclose(s->fp);
960
961         /*
962          * Reject an attempt to record a non-merge empty commit without
963          * explicit --allow-empty. In the cherry-pick case, it may be
964          * empty due to conflict resolution, which the user should okay.
965          */
966         if (!committable && whence != FROM_MERGE && !allow_empty &&
967             !(amend && is_a_merge(current_head))) {
968                 s->hints = advice_status_hints;
969                 s->display_comment_prefix = old_display_comment_prefix;
970                 run_status(stdout, index_file, prefix, 0, s);
971                 if (amend)
972                         fputs(_(empty_amend_advice), stderr);
973                 else if (is_from_cherry_pick(whence) ||
974                          whence == FROM_REBASE_PICK) {
975                         fputs(_(empty_cherry_pick_advice), stderr);
976                         if (whence == FROM_CHERRY_PICK_SINGLE)
977                                 fputs(_(empty_cherry_pick_advice_single), stderr);
978                         else if (whence == FROM_CHERRY_PICK_MULTI)
979                                 fputs(_(empty_cherry_pick_advice_multi), stderr);
980                         else
981                                 fputs(_(empty_rebase_pick_advice), stderr);
982                 }
983                 return 0;
984         }
985
986         if (!no_verify && find_hook("pre-commit")) {
987                 /*
988                  * Re-read the index as pre-commit hook could have updated it,
989                  * and write it out as a tree.  We must do this before we invoke
990                  * the editor and after we invoke run_status above.
991                  */
992                 discard_cache();
993         }
994         read_cache_from(index_file);
995
996         if (update_main_cache_tree(0)) {
997                 error(_("Error building trees"));
998                 return 0;
999         }
1000
1001         if (run_commit_hook(use_editor, index_file, "prepare-commit-msg",
1002                             git_path_commit_editmsg(), hook_arg1, hook_arg2, NULL))
1003                 return 0;
1004
1005         if (use_editor) {
1006                 struct strvec env = STRVEC_INIT;
1007
1008                 strvec_pushf(&env, "GIT_INDEX_FILE=%s", index_file);
1009                 if (launch_editor(git_path_commit_editmsg(), NULL, env.v)) {
1010                         fprintf(stderr,
1011                         _("Please supply the message using either -m or -F option.\n"));
1012                         exit(1);
1013                 }
1014                 strvec_clear(&env);
1015         }
1016
1017         if (!no_verify &&
1018             run_commit_hook(use_editor, index_file, "commit-msg", git_path_commit_editmsg(), NULL)) {
1019                 return 0;
1020         }
1021
1022         return 1;
1023 }
1024
1025 static const char *find_author_by_nickname(const char *name)
1026 {
1027         struct rev_info revs;
1028         struct commit *commit;
1029         struct strbuf buf = STRBUF_INIT;
1030         struct string_list mailmap = STRING_LIST_INIT_NODUP;
1031         const char *av[20];
1032         int ac = 0;
1033
1034         repo_init_revisions(the_repository, &revs, NULL);
1035         strbuf_addf(&buf, "--author=%s", name);
1036         av[++ac] = "--all";
1037         av[++ac] = "-i";
1038         av[++ac] = buf.buf;
1039         av[++ac] = NULL;
1040         setup_revisions(ac, av, &revs, NULL);
1041         revs.mailmap = &mailmap;
1042         read_mailmap(revs.mailmap, NULL);
1043
1044         if (prepare_revision_walk(&revs))
1045                 die(_("revision walk setup failed"));
1046         commit = get_revision(&revs);
1047         if (commit) {
1048                 struct pretty_print_context ctx = {0};
1049                 ctx.date_mode.type = DATE_NORMAL;
1050                 strbuf_release(&buf);
1051                 format_commit_message(commit, "%aN <%aE>", &buf, &ctx);
1052                 clear_mailmap(&mailmap);
1053                 return strbuf_detach(&buf, NULL);
1054         }
1055         die(_("--author '%s' is not 'Name <email>' and matches no existing author"), name);
1056 }
1057
1058 static void handle_ignored_arg(struct wt_status *s)
1059 {
1060         if (!ignored_arg)
1061                 ; /* default already initialized */
1062         else if (!strcmp(ignored_arg, "traditional"))
1063                 s->show_ignored_mode = SHOW_TRADITIONAL_IGNORED;
1064         else if (!strcmp(ignored_arg, "no"))
1065                 s->show_ignored_mode = SHOW_NO_IGNORED;
1066         else if (!strcmp(ignored_arg, "matching"))
1067                 s->show_ignored_mode = SHOW_MATCHING_IGNORED;
1068         else
1069                 die(_("Invalid ignored mode '%s'"), ignored_arg);
1070 }
1071
1072 static void handle_untracked_files_arg(struct wt_status *s)
1073 {
1074         if (!untracked_files_arg)
1075                 ; /* default already initialized */
1076         else if (!strcmp(untracked_files_arg, "no"))
1077                 s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
1078         else if (!strcmp(untracked_files_arg, "normal"))
1079                 s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
1080         else if (!strcmp(untracked_files_arg, "all"))
1081                 s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
1082         /*
1083          * Please update $__git_untracked_file_modes in
1084          * git-completion.bash when you add new options
1085          */
1086         else
1087                 die(_("Invalid untracked files mode '%s'"), untracked_files_arg);
1088 }
1089
1090 static const char *read_commit_message(const char *name)
1091 {
1092         const char *out_enc;
1093         struct commit *commit;
1094
1095         commit = lookup_commit_reference_by_name(name);
1096         if (!commit)
1097                 die(_("could not lookup commit %s"), name);
1098         out_enc = get_commit_output_encoding();
1099         return logmsg_reencode(commit, NULL, out_enc);
1100 }
1101
1102 /*
1103  * Enumerate what needs to be propagated when --porcelain
1104  * is not in effect here.
1105  */
1106 static struct status_deferred_config {
1107         enum wt_status_format status_format;
1108         int show_branch;
1109         enum ahead_behind_flags ahead_behind;
1110 } status_deferred_config = {
1111         STATUS_FORMAT_UNSPECIFIED,
1112         -1, /* unspecified */
1113         AHEAD_BEHIND_UNSPECIFIED,
1114 };
1115
1116 static void finalize_deferred_config(struct wt_status *s)
1117 {
1118         int use_deferred_config = (status_format != STATUS_FORMAT_PORCELAIN &&
1119                                    status_format != STATUS_FORMAT_PORCELAIN_V2 &&
1120                                    !s->null_termination);
1121
1122         if (s->null_termination) {
1123                 if (status_format == STATUS_FORMAT_NONE ||
1124                     status_format == STATUS_FORMAT_UNSPECIFIED)
1125                         status_format = STATUS_FORMAT_PORCELAIN;
1126                 else if (status_format == STATUS_FORMAT_LONG)
1127                         die(_("--long and -z are incompatible"));
1128         }
1129
1130         if (use_deferred_config && status_format == STATUS_FORMAT_UNSPECIFIED)
1131                 status_format = status_deferred_config.status_format;
1132         if (status_format == STATUS_FORMAT_UNSPECIFIED)
1133                 status_format = STATUS_FORMAT_NONE;
1134
1135         if (use_deferred_config && s->show_branch < 0)
1136                 s->show_branch = status_deferred_config.show_branch;
1137         if (s->show_branch < 0)
1138                 s->show_branch = 0;
1139
1140         /*
1141          * If the user did not give a "--[no]-ahead-behind" command
1142          * line argument *AND* we will print in a human-readable format
1143          * (short, long etc.) then we inherit from the status.aheadbehind
1144          * config setting.  In all other cases (and porcelain V[12] formats
1145          * in particular), we inherit _FULL for backwards compatibility.
1146          */
1147         if (use_deferred_config &&
1148             s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
1149                 s->ahead_behind_flags = status_deferred_config.ahead_behind;
1150
1151         if (s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
1152                 s->ahead_behind_flags = AHEAD_BEHIND_FULL;
1153 }
1154
1155 static int parse_and_validate_options(int argc, const char *argv[],
1156                                       const struct option *options,
1157                                       const char * const usage[],
1158                                       const char *prefix,
1159                                       struct commit *current_head,
1160                                       struct wt_status *s)
1161 {
1162         int f = 0;
1163
1164         argc = parse_options(argc, argv, prefix, options, usage, 0);
1165         finalize_deferred_config(s);
1166
1167         if (force_author && !strchr(force_author, '>'))
1168                 force_author = find_author_by_nickname(force_author);
1169
1170         if (force_author && renew_authorship)
1171                 die(_("Using both --reset-author and --author does not make sense"));
1172
1173         if (logfile || have_option_m || use_message || fixup_message)
1174                 use_editor = 0;
1175         if (0 <= edit_flag)
1176                 use_editor = edit_flag;
1177
1178         /* Sanity check options */
1179         if (amend && !current_head)
1180                 die(_("You have nothing to amend."));
1181         if (amend && whence != FROM_COMMIT) {
1182                 if (whence == FROM_MERGE)
1183                         die(_("You are in the middle of a merge -- cannot amend."));
1184                 else if (is_from_cherry_pick(whence))
1185                         die(_("You are in the middle of a cherry-pick -- cannot amend."));
1186                 else if (whence == FROM_REBASE_PICK)
1187                         die(_("You are in the middle of a rebase -- cannot amend."));
1188         }
1189         if (fixup_message && squash_message)
1190                 die(_("Options --squash and --fixup cannot be used together"));
1191         if (use_message)
1192                 f++;
1193         if (edit_message)
1194                 f++;
1195         if (fixup_message)
1196                 f++;
1197         if (logfile)
1198                 f++;
1199         if (f > 1)
1200                 die(_("Only one of -c/-C/-F/--fixup can be used."));
1201         if (have_option_m && (edit_message || use_message || logfile))
1202                 die((_("Option -m cannot be combined with -c/-C/-F.")));
1203         if (f || have_option_m)
1204                 template_file = NULL;
1205         if (edit_message)
1206                 use_message = edit_message;
1207         if (amend && !use_message && !fixup_message)
1208                 use_message = "HEAD";
1209         if (!use_message && !is_from_cherry_pick(whence) &&
1210             !is_from_rebase(whence) && renew_authorship)
1211                 die(_("--reset-author can be used only with -C, -c or --amend."));
1212         if (use_message) {
1213                 use_message_buffer = read_commit_message(use_message);
1214                 if (!renew_authorship) {
1215                         author_message = use_message;
1216                         author_message_buffer = use_message_buffer;
1217                 }
1218         }
1219         if ((is_from_cherry_pick(whence) || whence == FROM_REBASE_PICK) &&
1220             !renew_authorship) {
1221                 author_message = "CHERRY_PICK_HEAD";
1222                 author_message_buffer = read_commit_message(author_message);
1223         }
1224
1225         if (patch_interactive)
1226                 interactive = 1;
1227
1228         if (also + only + all + interactive > 1)
1229                 die(_("Only one of --include/--only/--all/--interactive/--patch can be used."));
1230         cleanup_mode = get_cleanup_mode(cleanup_arg, use_editor);
1231
1232         handle_untracked_files_arg(s);
1233
1234         if (all && argc > 0)
1235                 die(_("paths '%s ...' with -a does not make sense"),
1236                     argv[0]);
1237
1238         if (status_format != STATUS_FORMAT_NONE)
1239                 dry_run = 1;
1240
1241         return argc;
1242 }
1243
1244 static int dry_run_commit(const char **argv, const char *prefix,
1245                           const struct commit *current_head, struct wt_status *s)
1246 {
1247         int committable;
1248         const char *index_file;
1249
1250         index_file = prepare_index(argv, prefix, current_head, 1);
1251         committable = run_status(stdout, index_file, prefix, 0, s);
1252         rollback_index_files();
1253
1254         return committable ? 0 : 1;
1255 }
1256
1257 define_list_config_array_extra(color_status_slots, {"added"});
1258
1259 static int parse_status_slot(const char *slot)
1260 {
1261         if (!strcasecmp(slot, "added"))
1262                 return WT_STATUS_UPDATED;
1263
1264         return LOOKUP_CONFIG(color_status_slots, slot);
1265 }
1266
1267 static int git_status_config(const char *k, const char *v, void *cb)
1268 {
1269         struct wt_status *s = cb;
1270         const char *slot_name;
1271
1272         if (starts_with(k, "column."))
1273                 return git_column_config(k, v, "status", &s->colopts);
1274         if (!strcmp(k, "status.submodulesummary")) {
1275                 int is_bool;
1276                 s->submodule_summary = git_config_bool_or_int(k, v, &is_bool);
1277                 if (is_bool && s->submodule_summary)
1278                         s->submodule_summary = -1;
1279                 return 0;
1280         }
1281         if (!strcmp(k, "status.short")) {
1282                 if (git_config_bool(k, v))
1283                         status_deferred_config.status_format = STATUS_FORMAT_SHORT;
1284                 else
1285                         status_deferred_config.status_format = STATUS_FORMAT_NONE;
1286                 return 0;
1287         }
1288         if (!strcmp(k, "status.branch")) {
1289                 status_deferred_config.show_branch = git_config_bool(k, v);
1290                 return 0;
1291         }
1292         if (!strcmp(k, "status.aheadbehind")) {
1293                 status_deferred_config.ahead_behind = git_config_bool(k, v);
1294                 return 0;
1295         }
1296         if (!strcmp(k, "status.showstash")) {
1297                 s->show_stash = git_config_bool(k, v);
1298                 return 0;
1299         }
1300         if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
1301                 s->use_color = git_config_colorbool(k, v);
1302                 return 0;
1303         }
1304         if (!strcmp(k, "status.displaycommentprefix")) {
1305                 s->display_comment_prefix = git_config_bool(k, v);
1306                 return 0;
1307         }
1308         if (skip_prefix(k, "status.color.", &slot_name) ||
1309             skip_prefix(k, "color.status.", &slot_name)) {
1310                 int slot = parse_status_slot(slot_name);
1311                 if (slot < 0)
1312                         return 0;
1313                 if (!v)
1314                         return config_error_nonbool(k);
1315                 return color_parse(v, s->color_palette[slot]);
1316         }
1317         if (!strcmp(k, "status.relativepaths")) {
1318                 s->relative_paths = git_config_bool(k, v);
1319                 return 0;
1320         }
1321         if (!strcmp(k, "status.showuntrackedfiles")) {
1322                 if (!v)
1323                         return config_error_nonbool(k);
1324                 else if (!strcmp(v, "no"))
1325                         s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
1326                 else if (!strcmp(v, "normal"))
1327                         s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
1328                 else if (!strcmp(v, "all"))
1329                         s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
1330                 else
1331                         return error(_("Invalid untracked files mode '%s'"), v);
1332                 return 0;
1333         }
1334         if (!strcmp(k, "diff.renamelimit")) {
1335                 if (s->rename_limit == -1)
1336                         s->rename_limit = git_config_int(k, v);
1337                 return 0;
1338         }
1339         if (!strcmp(k, "status.renamelimit")) {
1340                 s->rename_limit = git_config_int(k, v);
1341                 return 0;
1342         }
1343         if (!strcmp(k, "diff.renames")) {
1344                 if (s->detect_rename == -1)
1345                         s->detect_rename = git_config_rename(k, v);
1346                 return 0;
1347         }
1348         if (!strcmp(k, "status.renames")) {
1349                 s->detect_rename = git_config_rename(k, v);
1350                 return 0;
1351         }
1352         return git_diff_ui_config(k, v, NULL);
1353 }
1354
1355 int cmd_status(int argc, const char **argv, const char *prefix)
1356 {
1357         static int no_renames = -1;
1358         static const char *rename_score_arg = (const char *)-1;
1359         static struct wt_status s;
1360         unsigned int progress_flag = 0;
1361         int fd;
1362         struct object_id oid;
1363         static struct option builtin_status_options[] = {
1364                 OPT__VERBOSE(&verbose, N_("be verbose")),
1365                 OPT_SET_INT('s', "short", &status_format,
1366                             N_("show status concisely"), STATUS_FORMAT_SHORT),
1367                 OPT_BOOL('b', "branch", &s.show_branch,
1368                          N_("show branch information")),
1369                 OPT_BOOL(0, "show-stash", &s.show_stash,
1370                          N_("show stash information")),
1371                 OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
1372                          N_("compute full ahead/behind values")),
1373                 OPT_CALLBACK_F(0, "porcelain", &status_format,
1374                   N_("version"), N_("machine-readable output"),
1375                   PARSE_OPT_OPTARG, opt_parse_porcelain),
1376                 OPT_SET_INT(0, "long", &status_format,
1377                             N_("show status in long format (default)"),
1378                             STATUS_FORMAT_LONG),
1379                 OPT_BOOL('z', "null", &s.null_termination,
1380                          N_("terminate entries with NUL")),
1381                 { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg,
1382                   N_("mode"),
1383                   N_("show untracked files, optional modes: all, normal, no. (Default: all)"),
1384                   PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
1385                 { OPTION_STRING, 0, "ignored", &ignored_arg,
1386                   N_("mode"),
1387                   N_("show ignored files, optional modes: traditional, matching, no. (Default: traditional)"),
1388                   PARSE_OPT_OPTARG, NULL, (intptr_t)"traditional" },
1389                 { OPTION_STRING, 0, "ignore-submodules", &ignore_submodule_arg, N_("when"),
1390                   N_("ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)"),
1391                   PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
1392                 OPT_COLUMN(0, "column", &s.colopts, N_("list untracked files in columns")),
1393                 OPT_BOOL(0, "no-renames", &no_renames, N_("do not detect renames")),
1394                 OPT_CALLBACK_F('M', "find-renames", &rename_score_arg,
1395                   N_("n"), N_("detect renames, optionally set similarity index"),
1396                   PARSE_OPT_OPTARG | PARSE_OPT_NONEG, opt_parse_rename_score),
1397                 OPT_END(),
1398         };
1399
1400         if (argc == 2 && !strcmp(argv[1], "-h"))
1401                 usage_with_options(builtin_status_usage, builtin_status_options);
1402
1403         status_init_config(&s, git_status_config);
1404         argc = parse_options(argc, argv, prefix,
1405                              builtin_status_options,
1406                              builtin_status_usage, 0);
1407         finalize_colopts(&s.colopts, -1);
1408         finalize_deferred_config(&s);
1409
1410         handle_untracked_files_arg(&s);
1411         handle_ignored_arg(&s);
1412
1413         if (s.show_ignored_mode == SHOW_MATCHING_IGNORED &&
1414             s.show_untracked_files == SHOW_NO_UNTRACKED_FILES)
1415                 die(_("Unsupported combination of ignored and untracked-files arguments"));
1416
1417         parse_pathspec(&s.pathspec, 0,
1418                        PATHSPEC_PREFER_FULL,
1419                        prefix, argv);
1420
1421         if (status_format != STATUS_FORMAT_PORCELAIN &&
1422             status_format != STATUS_FORMAT_PORCELAIN_V2)
1423                 progress_flag = REFRESH_PROGRESS;
1424         repo_read_index(the_repository);
1425         refresh_index(&the_index,
1426                       REFRESH_QUIET|REFRESH_UNMERGED|progress_flag,
1427                       &s.pathspec, NULL, NULL);
1428
1429         if (use_optional_locks())
1430                 fd = hold_locked_index(&index_lock, 0);
1431         else
1432                 fd = -1;
1433
1434         s.is_initial = get_oid(s.reference, &oid) ? 1 : 0;
1435         if (!s.is_initial)
1436                 oidcpy(&s.oid_commit, &oid);
1437
1438         s.ignore_submodule_arg = ignore_submodule_arg;
1439         s.status_format = status_format;
1440         s.verbose = verbose;
1441         if (no_renames != -1)
1442                 s.detect_rename = !no_renames;
1443         if ((intptr_t)rename_score_arg != -1) {
1444                 if (s.detect_rename < DIFF_DETECT_RENAME)
1445                         s.detect_rename = DIFF_DETECT_RENAME;
1446                 if (rename_score_arg)
1447                         s.rename_score = parse_rename_score(&rename_score_arg);
1448         }
1449
1450         wt_status_collect(&s);
1451
1452         if (0 <= fd)
1453                 repo_update_index_if_able(the_repository, &index_lock);
1454
1455         if (s.relative_paths)
1456                 s.prefix = prefix;
1457
1458         wt_status_print(&s);
1459         wt_status_collect_free_buffers(&s);
1460
1461         return 0;
1462 }
1463
1464 static int git_commit_config(const char *k, const char *v, void *cb)
1465 {
1466         struct wt_status *s = cb;
1467         int status;
1468
1469         if (!strcmp(k, "commit.template"))
1470                 return git_config_pathname(&template_file, k, v);
1471         if (!strcmp(k, "commit.status")) {
1472                 include_status = git_config_bool(k, v);
1473                 return 0;
1474         }
1475         if (!strcmp(k, "commit.cleanup"))
1476                 return git_config_string(&cleanup_arg, k, v);
1477         if (!strcmp(k, "commit.gpgsign")) {
1478                 sign_commit = git_config_bool(k, v) ? "" : NULL;
1479                 return 0;
1480         }
1481         if (!strcmp(k, "commit.verbose")) {
1482                 int is_bool;
1483                 config_commit_verbose = git_config_bool_or_int(k, v, &is_bool);
1484                 return 0;
1485         }
1486
1487         status = git_gpg_config(k, v, NULL);
1488         if (status)
1489                 return status;
1490         return git_status_config(k, v, s);
1491 }
1492
1493 int cmd_commit(int argc, const char **argv, const char *prefix)
1494 {
1495         static struct wt_status s;
1496         static struct option builtin_commit_options[] = {
1497                 OPT__QUIET(&quiet, N_("suppress summary after successful commit")),
1498                 OPT__VERBOSE(&verbose, N_("show diff in commit message template")),
1499
1500                 OPT_GROUP(N_("Commit message options")),
1501                 OPT_FILENAME('F', "file", &logfile, N_("read message from file")),
1502                 OPT_STRING(0, "author", &force_author, N_("author"), N_("override author for commit")),
1503                 OPT_STRING(0, "date", &force_date, N_("date"), N_("override date for commit")),
1504                 OPT_CALLBACK('m', "message", &message, N_("message"), N_("commit message"), opt_parse_m),
1505                 OPT_STRING('c', "reedit-message", &edit_message, N_("commit"), N_("reuse and edit message from specified commit")),
1506                 OPT_STRING('C', "reuse-message", &use_message, N_("commit"), N_("reuse message from specified commit")),
1507                 OPT_STRING(0, "fixup", &fixup_message, N_("commit"), N_("use autosquash formatted message to fixup specified commit")),
1508                 OPT_STRING(0, "squash", &squash_message, N_("commit"), N_("use autosquash formatted message to squash specified commit")),
1509                 OPT_BOOL(0, "reset-author", &renew_authorship, N_("the commit is authored by me now (used with -C/-c/--amend)")),
1510                 OPT_BOOL('s', "signoff", &signoff, N_("add a Signed-off-by trailer")),
1511                 OPT_FILENAME('t', "template", &template_file, N_("use specified template file")),
1512                 OPT_BOOL('e', "edit", &edit_flag, N_("force edit of commit")),
1513                 OPT_CLEANUP(&cleanup_arg),
1514                 OPT_BOOL(0, "status", &include_status, N_("include status in commit message template")),
1515                 { OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
1516                   N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
1517                 /* end commit message options */
1518
1519                 OPT_GROUP(N_("Commit contents options")),
1520                 OPT_BOOL('a', "all", &all, N_("commit all changed files")),
1521                 OPT_BOOL('i', "include", &also, N_("add specified files to index for commit")),
1522                 OPT_BOOL(0, "interactive", &interactive, N_("interactively add files")),
1523                 OPT_BOOL('p', "patch", &patch_interactive, N_("interactively add changes")),
1524                 OPT_BOOL('o', "only", &only, N_("commit only specified files")),
1525                 OPT_BOOL('n', "no-verify", &no_verify, N_("bypass pre-commit and commit-msg hooks")),
1526                 OPT_BOOL(0, "dry-run", &dry_run, N_("show what would be committed")),
1527                 OPT_SET_INT(0, "short", &status_format, N_("show status concisely"),
1528                             STATUS_FORMAT_SHORT),
1529                 OPT_BOOL(0, "branch", &s.show_branch, N_("show branch information")),
1530                 OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
1531                          N_("compute full ahead/behind values")),
1532                 OPT_SET_INT(0, "porcelain", &status_format,
1533                             N_("machine-readable output"), STATUS_FORMAT_PORCELAIN),
1534                 OPT_SET_INT(0, "long", &status_format,
1535                             N_("show status in long format (default)"),
1536                             STATUS_FORMAT_LONG),
1537                 OPT_BOOL('z', "null", &s.null_termination,
1538                          N_("terminate entries with NUL")),
1539                 OPT_BOOL(0, "amend", &amend, N_("amend previous commit")),
1540                 OPT_BOOL(0, "no-post-rewrite", &no_post_rewrite, N_("bypass post-rewrite hook")),
1541                 { 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" },
1542                 OPT_PATHSPEC_FROM_FILE(&pathspec_from_file),
1543                 OPT_PATHSPEC_FILE_NUL(&pathspec_file_nul),
1544                 /* end commit contents options */
1545
1546                 OPT_HIDDEN_BOOL(0, "allow-empty", &allow_empty,
1547                                 N_("ok to record an empty change")),
1548                 OPT_HIDDEN_BOOL(0, "allow-empty-message", &allow_empty_message,
1549                                 N_("ok to record a change with an empty message")),
1550
1551                 OPT_END()
1552         };
1553
1554         struct strbuf sb = STRBUF_INIT;
1555         struct strbuf author_ident = STRBUF_INIT;
1556         const char *index_file, *reflog_msg;
1557         struct object_id oid;
1558         struct commit_list *parents = NULL;
1559         struct stat statbuf;
1560         struct commit *current_head = NULL;
1561         struct commit_extra_header *extra = NULL;
1562         struct strbuf err = STRBUF_INIT;
1563
1564         if (argc == 2 && !strcmp(argv[1], "-h"))
1565                 usage_with_options(builtin_commit_usage, builtin_commit_options);
1566
1567         status_init_config(&s, git_commit_config);
1568         s.commit_template = 1;
1569         status_format = STATUS_FORMAT_NONE; /* Ignore status.short */
1570         s.colopts = 0;
1571
1572         if (get_oid("HEAD", &oid))
1573                 current_head = NULL;
1574         else {
1575                 current_head = lookup_commit_or_die(&oid, "HEAD");
1576                 if (parse_commit(current_head))
1577                         die(_("could not parse HEAD commit"));
1578         }
1579         verbose = -1; /* unspecified */
1580         argc = parse_and_validate_options(argc, argv, builtin_commit_options,
1581                                           builtin_commit_usage,
1582                                           prefix, current_head, &s);
1583         if (verbose == -1)
1584                 verbose = (config_commit_verbose < 0) ? 0 : config_commit_verbose;
1585
1586         if (dry_run)
1587                 return dry_run_commit(argv, prefix, current_head, &s);
1588         index_file = prepare_index(argv, prefix, current_head, 0);
1589
1590         /* Set up everything for writing the commit object.  This includes
1591            running hooks, writing the trees, and interacting with the user.  */
1592         if (!prepare_to_commit(index_file, prefix,
1593                                current_head, &s, &author_ident)) {
1594                 rollback_index_files();
1595                 return 1;
1596         }
1597
1598         /* Determine parents */
1599         reflog_msg = getenv("GIT_REFLOG_ACTION");
1600         if (!current_head) {
1601                 if (!reflog_msg)
1602                         reflog_msg = "commit (initial)";
1603         } else if (amend) {
1604                 if (!reflog_msg)
1605                         reflog_msg = "commit (amend)";
1606                 parents = copy_commit_list(current_head->parents);
1607         } else if (whence == FROM_MERGE) {
1608                 struct strbuf m = STRBUF_INIT;
1609                 FILE *fp;
1610                 int allow_fast_forward = 1;
1611                 struct commit_list **pptr = &parents;
1612
1613                 if (!reflog_msg)
1614                         reflog_msg = "commit (merge)";
1615                 pptr = commit_list_append(current_head, pptr);
1616                 fp = xfopen(git_path_merge_head(the_repository), "r");
1617                 while (strbuf_getline_lf(&m, fp) != EOF) {
1618                         struct commit *parent;
1619
1620                         parent = get_merge_parent(m.buf);
1621                         if (!parent)
1622                                 die(_("Corrupt MERGE_HEAD file (%s)"), m.buf);
1623                         pptr = commit_list_append(parent, pptr);
1624                 }
1625                 fclose(fp);
1626                 strbuf_release(&m);
1627                 if (!stat(git_path_merge_mode(the_repository), &statbuf)) {
1628                         if (strbuf_read_file(&sb, git_path_merge_mode(the_repository), 0) < 0)
1629                                 die_errno(_("could not read MERGE_MODE"));
1630                         if (!strcmp(sb.buf, "no-ff"))
1631                                 allow_fast_forward = 0;
1632                 }
1633                 if (allow_fast_forward)
1634                         reduce_heads_replace(&parents);
1635         } else {
1636                 if (!reflog_msg)
1637                         reflog_msg = is_from_cherry_pick(whence)
1638                                         ? "commit (cherry-pick)"
1639                                         : is_from_rebase(whence)
1640                                         ? "commit (rebase)"
1641                                         : "commit";
1642                 commit_list_insert(current_head, &parents);
1643         }
1644
1645         /* Finally, get the commit message */
1646         strbuf_reset(&sb);
1647         if (strbuf_read_file(&sb, git_path_commit_editmsg(), 0) < 0) {
1648                 int saved_errno = errno;
1649                 rollback_index_files();
1650                 die(_("could not read commit message: %s"), strerror(saved_errno));
1651         }
1652
1653         cleanup_message(&sb, cleanup_mode, verbose);
1654
1655         if (message_is_empty(&sb, cleanup_mode) && !allow_empty_message) {
1656                 rollback_index_files();
1657                 fprintf(stderr, _("Aborting commit due to empty commit message.\n"));
1658                 exit(1);
1659         }
1660         if (template_untouched(&sb, template_file, cleanup_mode) && !allow_empty_message) {
1661                 rollback_index_files();
1662                 fprintf(stderr, _("Aborting commit; you did not edit the message.\n"));
1663                 exit(1);
1664         }
1665
1666         if (amend) {
1667                 const char *exclude_gpgsig[3] = { "gpgsig", "gpgsig-sha256", NULL };
1668                 extra = read_commit_extra_headers(current_head, exclude_gpgsig);
1669         } else {
1670                 struct commit_extra_header **tail = &extra;
1671                 append_merge_tag_headers(parents, &tail);
1672         }
1673
1674         if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
1675                                  parents, &oid, author_ident.buf, NULL,
1676                                  sign_commit, extra)) {
1677                 rollback_index_files();
1678                 die(_("failed to write commit object"));
1679         }
1680         strbuf_release(&author_ident);
1681         free_commit_extra_headers(extra);
1682
1683         if (update_head_with_reflog(current_head, &oid, reflog_msg, &sb,
1684                                     &err)) {
1685                 rollback_index_files();
1686                 die("%s", err.buf);
1687         }
1688
1689         sequencer_post_commit_cleanup(the_repository, 0);
1690         unlink(git_path_merge_head(the_repository));
1691         unlink(git_path_merge_msg(the_repository));
1692         unlink(git_path_merge_mode(the_repository));
1693         unlink(git_path_squash_msg(the_repository));
1694
1695         if (commit_index_files())
1696                 die(_("repository has been updated, but unable to write\n"
1697                       "new_index file. Check that disk is not full and quota is\n"
1698                       "not exceeded, and then \"git restore --staged :/\" to recover."));
1699
1700         git_test_write_commit_graph_or_die();
1701
1702         repo_rerere(the_repository, 0);
1703         run_auto_maintenance(quiet);
1704         run_commit_hook(use_editor, get_index_file(), "post-commit", NULL);
1705         if (amend && !no_post_rewrite) {
1706                 commit_post_rewrite(the_repository, current_head, &oid);
1707         }
1708         if (!quiet) {
1709                 unsigned int flags = 0;
1710
1711                 if (!current_head)
1712                         flags |= SUMMARY_INITIAL_COMMIT;
1713                 if (author_date_is_interesting())
1714                         flags |= SUMMARY_SHOW_AUTHOR_DATE;
1715                 print_commit_summary(the_repository, prefix,
1716                                      &oid, flags);
1717         }
1718
1719         apply_autostash(git_path_merge_autostash(the_repository));
1720
1721         UNLEAK(err);
1722         UNLEAK(sb);
1723         return 0;
1724 }