Merge branch 'jk/pack-objects-reports-num-objects-to-trace2'
[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_cherry_pick_advice_single[] =
63 N_("Otherwise, please use 'git reset'\n");
64
65 static const char empty_cherry_pick_advice_multi[] =
66 N_("If you wish to skip this commit, use:\n"
67 "\n"
68 "    git reset\n"
69 "\n"
70 "Then \"git cherry-pick --continue\" will resume cherry-picking\n"
71 "the remaining commits.\n");
72
73 static const char *color_status_slots[] = {
74         [WT_STATUS_HEADER]        = "header",
75         [WT_STATUS_UPDATED]       = "updated",
76         [WT_STATUS_CHANGED]       = "changed",
77         [WT_STATUS_UNTRACKED]     = "untracked",
78         [WT_STATUS_NOBRANCH]      = "noBranch",
79         [WT_STATUS_UNMERGED]      = "unmerged",
80         [WT_STATUS_LOCAL_BRANCH]  = "localBranch",
81         [WT_STATUS_REMOTE_BRANCH] = "remoteBranch",
82         [WT_STATUS_ONBRANCH]      = "branch",
83 };
84
85 static const char *use_message_buffer;
86 static struct lock_file index_lock; /* real index */
87 static struct lock_file false_lock; /* used only for partial commits */
88 static enum {
89         COMMIT_AS_IS = 1,
90         COMMIT_NORMAL,
91         COMMIT_PARTIAL
92 } commit_style;
93
94 static const char *logfile, *force_author;
95 static const char *template_file;
96 /*
97  * The _message variables are commit names from which to take
98  * the commit message and/or authorship.
99  */
100 static const char *author_message, *author_message_buffer;
101 static char *edit_message, *use_message;
102 static char *fixup_message, *squash_message;
103 static int all, also, interactive, patch_interactive, only, amend, signoff;
104 static int edit_flag = -1; /* unspecified */
105 static int quiet, verbose, no_verify, allow_empty, dry_run, renew_authorship;
106 static int config_commit_verbose = -1; /* unspecified */
107 static int no_post_rewrite, allow_empty_message;
108 static char *untracked_files_arg, *force_date, *ignore_submodule_arg, *ignored_arg;
109 static char *sign_commit;
110
111 /*
112  * The default commit message cleanup mode will remove the lines
113  * beginning with # (shell comments) and leading and trailing
114  * whitespaces (empty lines or containing only whitespaces)
115  * if editor is used, and only the whitespaces if the message
116  * is specified explicitly.
117  */
118 static enum commit_msg_cleanup_mode cleanup_mode;
119 static const char *cleanup_arg;
120
121 static enum commit_whence whence;
122 static int sequencer_in_use;
123 static int use_editor = 1, include_status = 1;
124 static int have_option_m;
125 static struct strbuf message = STRBUF_INIT;
126
127 static enum wt_status_format status_format = STATUS_FORMAT_UNSPECIFIED;
128
129 static int opt_parse_porcelain(const struct option *opt, const char *arg, int unset)
130 {
131         enum wt_status_format *value = (enum wt_status_format *)opt->value;
132         if (unset)
133                 *value = STATUS_FORMAT_NONE;
134         else if (!arg)
135                 *value = STATUS_FORMAT_PORCELAIN;
136         else if (!strcmp(arg, "v1") || !strcmp(arg, "1"))
137                 *value = STATUS_FORMAT_PORCELAIN;
138         else if (!strcmp(arg, "v2") || !strcmp(arg, "2"))
139                 *value = STATUS_FORMAT_PORCELAIN_V2;
140         else
141                 die("unsupported porcelain version '%s'", arg);
142
143         return 0;
144 }
145
146 static int opt_parse_m(const struct option *opt, const char *arg, int unset)
147 {
148         struct strbuf *buf = opt->value;
149         if (unset) {
150                 have_option_m = 0;
151                 strbuf_setlen(buf, 0);
152         } else {
153                 have_option_m = 1;
154                 if (buf->len)
155                         strbuf_addch(buf, '\n');
156                 strbuf_addstr(buf, arg);
157                 strbuf_complete_line(buf);
158         }
159         return 0;
160 }
161
162 static int opt_parse_rename_score(const struct option *opt, const char *arg, int unset)
163 {
164         const char **value = opt->value;
165
166         BUG_ON_OPT_NEG(unset);
167
168         if (arg != NULL && *arg == '=')
169                 arg = arg + 1;
170
171         *value = arg;
172         return 0;
173 }
174
175 static void determine_whence(struct wt_status *s)
176 {
177         if (file_exists(git_path_merge_head(the_repository)))
178                 whence = FROM_MERGE;
179         else if (file_exists(git_path_cherry_pick_head(the_repository))) {
180                 whence = FROM_CHERRY_PICK;
181                 if (file_exists(git_path_seq_dir()))
182                         sequencer_in_use = 1;
183         }
184         else
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(int argc, 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 (read_cache_preload(&pathspec) < 0)
344                 die(_("index file corrupt"));
345
346         if (interactive) {
347                 char *old_index_env = NULL;
348                 hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
349
350                 refresh_cache_or_die(refresh_flags);
351
352                 if (write_locked_index(&the_index, &index_lock, 0))
353                         die(_("unable to create temporary index"));
354
355                 old_index_env = xstrdup_or_null(getenv(INDEX_ENVIRONMENT));
356                 setenv(INDEX_ENVIRONMENT, get_lock_file_path(&index_lock), 1);
357
358                 if (interactive_add(argc, argv, prefix, patch_interactive) != 0)
359                         die(_("interactive add failed"));
360
361                 if (old_index_env && *old_index_env)
362                         setenv(INDEX_ENVIRONMENT, old_index_env, 1);
363                 else
364                         unsetenv(INDEX_ENVIRONMENT);
365                 FREE_AND_NULL(old_index_env);
366
367                 discard_cache();
368                 read_cache_from(get_lock_file_path(&index_lock));
369                 if (update_main_cache_tree(WRITE_TREE_SILENT) == 0) {
370                         if (reopen_lock_file(&index_lock) < 0)
371                                 die(_("unable to write index file"));
372                         if (write_locked_index(&the_index, &index_lock, 0))
373                                 die(_("unable to update temporary index"));
374                 } else
375                         warning(_("Failed to update main cache tree"));
376
377                 commit_style = COMMIT_NORMAL;
378                 ret = get_lock_file_path(&index_lock);
379                 goto out;
380         }
381
382         /*
383          * Non partial, non as-is commit.
384          *
385          * (1) get the real index;
386          * (2) update the_index as necessary;
387          * (3) write the_index out to the real index (still locked);
388          * (4) return the name of the locked index file.
389          *
390          * The caller should run hooks on the locked real index, and
391          * (A) if all goes well, commit the real index;
392          * (B) on failure, rollback the real index.
393          */
394         if (all || (also && pathspec.nr)) {
395                 hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
396                 add_files_to_cache(also ? prefix : NULL, &pathspec, 0);
397                 refresh_cache_or_die(refresh_flags);
398                 update_main_cache_tree(WRITE_TREE_SILENT);
399                 if (write_locked_index(&the_index, &index_lock, 0))
400                         die(_("unable to write new_index file"));
401                 commit_style = COMMIT_NORMAL;
402                 ret = get_lock_file_path(&index_lock);
403                 goto out;
404         }
405
406         /*
407          * As-is commit.
408          *
409          * (1) return the name of the real index file.
410          *
411          * The caller should run hooks on the real index,
412          * and create commit from the_index.
413          * We still need to refresh the index here.
414          */
415         if (!only && !pathspec.nr) {
416                 hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
417                 refresh_cache_or_die(refresh_flags);
418                 if (active_cache_changed
419                     || !cache_tree_fully_valid(active_cache_tree))
420                         update_main_cache_tree(WRITE_TREE_SILENT);
421                 if (write_locked_index(&the_index, &index_lock,
422                                        COMMIT_LOCK | SKIP_IF_UNCHANGED))
423                         die(_("unable to write new_index file"));
424                 commit_style = COMMIT_AS_IS;
425                 ret = get_index_file();
426                 goto out;
427         }
428
429         /*
430          * A partial commit.
431          *
432          * (0) find the set of affected paths;
433          * (1) get lock on the real index file;
434          * (2) update the_index with the given paths;
435          * (3) write the_index out to the real index (still locked);
436          * (4) get lock on the false index file;
437          * (5) reset the_index from HEAD;
438          * (6) update the_index the same way as (2);
439          * (7) write the_index out to the false index file;
440          * (8) return the name of the false index file (still locked);
441          *
442          * The caller should run hooks on the locked false index, and
443          * create commit from it.  Then
444          * (A) if all goes well, commit the real index;
445          * (B) on failure, rollback the real index;
446          * In either case, rollback the false index.
447          */
448         commit_style = COMMIT_PARTIAL;
449
450         if (whence != FROM_COMMIT) {
451                 if (whence == FROM_MERGE)
452                         die(_("cannot do a partial commit during a merge."));
453                 else if (whence == FROM_CHERRY_PICK)
454                         die(_("cannot do a partial commit during a cherry-pick."));
455         }
456
457         if (list_paths(&partial, !current_head ? NULL : "HEAD", &pathspec))
458                 exit(1);
459
460         discard_cache();
461         if (read_cache() < 0)
462                 die(_("cannot read the index"));
463
464         hold_locked_index(&index_lock, LOCK_DIE_ON_ERROR);
465         add_remove_files(&partial);
466         refresh_cache(REFRESH_QUIET);
467         update_main_cache_tree(WRITE_TREE_SILENT);
468         if (write_locked_index(&the_index, &index_lock, 0))
469                 die(_("unable to write new_index file"));
470
471         hold_lock_file_for_update(&false_lock,
472                                   git_path("next-index-%"PRIuMAX,
473                                            (uintmax_t) getpid()),
474                                   LOCK_DIE_ON_ERROR);
475
476         create_base_index(current_head);
477         add_remove_files(&partial);
478         refresh_cache(REFRESH_QUIET);
479
480         if (write_locked_index(&the_index, &false_lock, 0))
481                 die(_("unable to write temporary index file"));
482
483         discard_cache();
484         ret = get_lock_file_path(&false_lock);
485         read_cache_from(ret);
486 out:
487         string_list_clear(&partial, 0);
488         clear_pathspec(&pathspec);
489         return ret;
490 }
491
492 static int run_status(FILE *fp, const char *index_file, const char *prefix, int nowarn,
493                       struct wt_status *s)
494 {
495         struct object_id oid;
496
497         if (s->relative_paths)
498                 s->prefix = prefix;
499
500         if (amend) {
501                 s->amend = 1;
502                 s->reference = "HEAD^1";
503         }
504         s->verbose = verbose;
505         s->index_file = index_file;
506         s->fp = fp;
507         s->nowarn = nowarn;
508         s->is_initial = get_oid(s->reference, &oid) ? 1 : 0;
509         if (!s->is_initial)
510                 hashcpy(s->sha1_commit, oid.hash);
511         s->status_format = status_format;
512         s->ignore_submodule_arg = ignore_submodule_arg;
513
514         wt_status_collect(s);
515         wt_status_print(s);
516         wt_status_collect_free_buffers(s);
517
518         return s->committable;
519 }
520
521 static int is_a_merge(const struct commit *current_head)
522 {
523         return !!(current_head->parents && current_head->parents->next);
524 }
525
526 static void assert_split_ident(struct ident_split *id, const struct strbuf *buf)
527 {
528         if (split_ident_line(id, buf->buf, buf->len) || !id->date_begin)
529                 BUG("unable to parse our own ident: %s", buf->buf);
530 }
531
532 static void export_one(const char *var, const char *s, const char *e, int hack)
533 {
534         struct strbuf buf = STRBUF_INIT;
535         if (hack)
536                 strbuf_addch(&buf, hack);
537         strbuf_addf(&buf, "%.*s", (int)(e - s), s);
538         setenv(var, buf.buf, 1);
539         strbuf_release(&buf);
540 }
541
542 static int parse_force_date(const char *in, struct strbuf *out)
543 {
544         strbuf_addch(out, '@');
545
546         if (parse_date(in, out) < 0) {
547                 int errors = 0;
548                 unsigned long t = approxidate_careful(in, &errors);
549                 if (errors)
550                         return -1;
551                 strbuf_addf(out, "%lu", t);
552         }
553
554         return 0;
555 }
556
557 static void set_ident_var(char **buf, char *val)
558 {
559         free(*buf);
560         *buf = val;
561 }
562
563 static void determine_author_info(struct strbuf *author_ident)
564 {
565         char *name, *email, *date;
566         struct ident_split author;
567
568         name = xstrdup_or_null(getenv("GIT_AUTHOR_NAME"));
569         email = xstrdup_or_null(getenv("GIT_AUTHOR_EMAIL"));
570         date = xstrdup_or_null(getenv("GIT_AUTHOR_DATE"));
571
572         if (author_message) {
573                 struct ident_split ident;
574                 size_t len;
575                 const char *a;
576
577                 a = find_commit_header(author_message_buffer, "author", &len);
578                 if (!a)
579                         die(_("commit '%s' lacks author header"), author_message);
580                 if (split_ident_line(&ident, a, len) < 0)
581                         die(_("commit '%s' has malformed author line"), author_message);
582
583                 set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
584                 set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));
585
586                 if (ident.date_begin) {
587                         struct strbuf date_buf = STRBUF_INIT;
588                         strbuf_addch(&date_buf, '@');
589                         strbuf_add(&date_buf, ident.date_begin, ident.date_end - ident.date_begin);
590                         strbuf_addch(&date_buf, ' ');
591                         strbuf_add(&date_buf, ident.tz_begin, ident.tz_end - ident.tz_begin);
592                         set_ident_var(&date, strbuf_detach(&date_buf, NULL));
593                 }
594         }
595
596         if (force_author) {
597                 struct ident_split ident;
598
599                 if (split_ident_line(&ident, force_author, strlen(force_author)) < 0)
600                         die(_("malformed --author parameter"));
601                 set_ident_var(&name, xmemdupz(ident.name_begin, ident.name_end - ident.name_begin));
602                 set_ident_var(&email, xmemdupz(ident.mail_begin, ident.mail_end - ident.mail_begin));
603         }
604
605         if (force_date) {
606                 struct strbuf date_buf = STRBUF_INIT;
607                 if (parse_force_date(force_date, &date_buf))
608                         die(_("invalid date format: %s"), force_date);
609                 set_ident_var(&date, strbuf_detach(&date_buf, NULL));
610         }
611
612         strbuf_addstr(author_ident, fmt_ident(name, email, WANT_AUTHOR_IDENT, date,
613                                 IDENT_STRICT));
614         assert_split_ident(&author, author_ident);
615         export_one("GIT_AUTHOR_NAME", author.name_begin, author.name_end, 0);
616         export_one("GIT_AUTHOR_EMAIL", author.mail_begin, author.mail_end, 0);
617         export_one("GIT_AUTHOR_DATE", author.date_begin, author.tz_end, '@');
618         free(name);
619         free(email);
620         free(date);
621 }
622
623 static int author_date_is_interesting(void)
624 {
625         return author_message || force_date;
626 }
627
628 static void adjust_comment_line_char(const struct strbuf *sb)
629 {
630         char candidates[] = "#;@!$%^&|:";
631         char *candidate;
632         const char *p;
633
634         comment_line_char = candidates[0];
635         if (!memchr(sb->buf, comment_line_char, sb->len))
636                 return;
637
638         p = sb->buf;
639         candidate = strchr(candidates, *p);
640         if (candidate)
641                 *candidate = ' ';
642         for (p = sb->buf; *p; p++) {
643                 if ((p[0] == '\n' || p[0] == '\r') && p[1]) {
644                         candidate = strchr(candidates, p[1]);
645                         if (candidate)
646                                 *candidate = ' ';
647                 }
648         }
649
650         for (p = candidates; *p == ' '; p++)
651                 ;
652         if (!*p)
653                 die(_("unable to select a comment character that is not used\n"
654                       "in the current commit message"));
655         comment_line_char = *p;
656 }
657
658 static int prepare_to_commit(const char *index_file, const char *prefix,
659                              struct commit *current_head,
660                              struct wt_status *s,
661                              struct strbuf *author_ident)
662 {
663         struct stat statbuf;
664         struct strbuf committer_ident = STRBUF_INIT;
665         int committable;
666         struct strbuf sb = STRBUF_INIT;
667         const char *hook_arg1 = NULL;
668         const char *hook_arg2 = NULL;
669         int clean_message_contents = (cleanup_mode != COMMIT_MSG_CLEANUP_NONE);
670         int old_display_comment_prefix;
671
672         /* This checks and barfs if author is badly specified */
673         determine_author_info(author_ident);
674
675         if (!no_verify && run_commit_hook(use_editor, index_file, "pre-commit", NULL))
676                 return 0;
677
678         if (squash_message) {
679                 /*
680                  * Insert the proper subject line before other commit
681                  * message options add their content.
682                  */
683                 if (use_message && !strcmp(use_message, squash_message))
684                         strbuf_addstr(&sb, "squash! ");
685                 else {
686                         struct pretty_print_context ctx = {0};
687                         struct commit *c;
688                         c = lookup_commit_reference_by_name(squash_message);
689                         if (!c)
690                                 die(_("could not lookup commit %s"), squash_message);
691                         ctx.output_encoding = get_commit_output_encoding();
692                         format_commit_message(c, "squash! %s\n\n", &sb,
693                                               &ctx);
694                 }
695         }
696
697         if (have_option_m && !fixup_message) {
698                 strbuf_addbuf(&sb, &message);
699                 hook_arg1 = "message";
700         } else if (logfile && !strcmp(logfile, "-")) {
701                 if (isatty(0))
702                         fprintf(stderr, _("(reading log message from standard input)\n"));
703                 if (strbuf_read(&sb, 0, 0) < 0)
704                         die_errno(_("could not read log from standard input"));
705                 hook_arg1 = "message";
706         } else if (logfile) {
707                 if (strbuf_read_file(&sb, logfile, 0) < 0)
708                         die_errno(_("could not read log file '%s'"),
709                                   logfile);
710                 hook_arg1 = "message";
711         } else if (use_message) {
712                 char *buffer;
713                 buffer = strstr(use_message_buffer, "\n\n");
714                 if (buffer)
715                         strbuf_addstr(&sb, skip_blank_lines(buffer + 2));
716                 hook_arg1 = "commit";
717                 hook_arg2 = use_message;
718         } else if (fixup_message) {
719                 struct pretty_print_context ctx = {0};
720                 struct commit *commit;
721                 commit = lookup_commit_reference_by_name(fixup_message);
722                 if (!commit)
723                         die(_("could not lookup commit %s"), fixup_message);
724                 ctx.output_encoding = get_commit_output_encoding();
725                 format_commit_message(commit, "fixup! %s\n\n",
726                                       &sb, &ctx);
727                 if (have_option_m)
728                         strbuf_addbuf(&sb, &message);
729                 hook_arg1 = "message";
730         } else if (!stat(git_path_merge_msg(the_repository), &statbuf)) {
731                 /*
732                  * prepend SQUASH_MSG here if it exists and a
733                  * "merge --squash" was originally performed
734                  */
735                 if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
736                         if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
737                                 die_errno(_("could not read SQUASH_MSG"));
738                         hook_arg1 = "squash";
739                 } else
740                         hook_arg1 = "merge";
741                 if (strbuf_read_file(&sb, git_path_merge_msg(the_repository), 0) < 0)
742                         die_errno(_("could not read MERGE_MSG"));
743         } else if (!stat(git_path_squash_msg(the_repository), &statbuf)) {
744                 if (strbuf_read_file(&sb, git_path_squash_msg(the_repository), 0) < 0)
745                         die_errno(_("could not read SQUASH_MSG"));
746                 hook_arg1 = "squash";
747         } else if (template_file) {
748                 if (strbuf_read_file(&sb, template_file, 0) < 0)
749                         die_errno(_("could not read '%s'"), template_file);
750                 hook_arg1 = "template";
751                 clean_message_contents = 0;
752         }
753
754         /*
755          * The remaining cases don't modify the template message, but
756          * just set the argument(s) to the prepare-commit-msg hook.
757          */
758         else if (whence == FROM_MERGE)
759                 hook_arg1 = "merge";
760         else if (whence == FROM_CHERRY_PICK) {
761                 hook_arg1 = "commit";
762                 hook_arg2 = "CHERRY_PICK_HEAD";
763         }
764
765         if (squash_message) {
766                 /*
767                  * If squash_commit was used for the commit subject,
768                  * then we're possibly hijacking other commit log options.
769                  * Reset the hook args to tell the real story.
770                  */
771                 hook_arg1 = "message";
772                 hook_arg2 = "";
773         }
774
775         s->fp = fopen_for_writing(git_path_commit_editmsg());
776         if (s->fp == NULL)
777                 die_errno(_("could not open '%s'"), git_path_commit_editmsg());
778
779         /* Ignore status.displayCommentPrefix: we do need comments in COMMIT_EDITMSG. */
780         old_display_comment_prefix = s->display_comment_prefix;
781         s->display_comment_prefix = 1;
782
783         /*
784          * Most hints are counter-productive when the commit has
785          * already started.
786          */
787         s->hints = 0;
788
789         if (clean_message_contents)
790                 strbuf_stripspace(&sb, 0);
791
792         if (signoff)
793                 append_signoff(&sb, ignore_non_trailer(sb.buf, sb.len), 0);
794
795         if (fwrite(sb.buf, 1, sb.len, s->fp) < sb.len)
796                 die_errno(_("could not write commit template"));
797
798         if (auto_comment_line_char)
799                 adjust_comment_line_char(&sb);
800         strbuf_release(&sb);
801
802         /* This checks if committer ident is explicitly given */
803         strbuf_addstr(&committer_ident, git_committer_info(IDENT_STRICT));
804         if (use_editor && include_status) {
805                 int ident_shown = 0;
806                 int saved_color_setting;
807                 struct ident_split ci, ai;
808
809                 if (whence != FROM_COMMIT) {
810                         if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
811                                 wt_status_add_cut_line(s->fp);
812                         status_printf_ln(s, GIT_COLOR_NORMAL,
813                             whence == FROM_MERGE
814                                 ? _("\n"
815                                         "It looks like you may be committing a merge.\n"
816                                         "If this is not correct, please remove the file\n"
817                                         "       %s\n"
818                                         "and try again.\n")
819                                 : _("\n"
820                                         "It looks like you may be committing a cherry-pick.\n"
821                                         "If this is not correct, please remove the file\n"
822                                         "       %s\n"
823                                         "and try again.\n"),
824                                 whence == FROM_MERGE ?
825                                         git_path_merge_head(the_repository) :
826                                         git_path_cherry_pick_head(the_repository));
827                 }
828
829                 fprintf(s->fp, "\n");
830                 if (cleanup_mode == COMMIT_MSG_CLEANUP_ALL)
831                         status_printf(s, GIT_COLOR_NORMAL,
832                                 _("Please enter the commit message for your changes."
833                                   " Lines starting\nwith '%c' will be ignored, and an empty"
834                                   " message aborts the commit.\n"), comment_line_char);
835                 else if (cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS &&
836                          whence == FROM_COMMIT)
837                         wt_status_add_cut_line(s->fp);
838                 else /* COMMIT_MSG_CLEANUP_SPACE, that is. */
839                         status_printf(s, GIT_COLOR_NORMAL,
840                                 _("Please enter the commit message for your changes."
841                                   " Lines starting\n"
842                                   "with '%c' will be kept; you may remove them"
843                                   " yourself if you want to.\n"
844                                   "An empty message aborts the commit.\n"), comment_line_char);
845
846                 /*
847                  * These should never fail because they come from our own
848                  * fmt_ident. They may fail the sane_ident test, but we know
849                  * that the name and mail pointers will at least be valid,
850                  * which is enough for our tests and printing here.
851                  */
852                 assert_split_ident(&ai, author_ident);
853                 assert_split_ident(&ci, &committer_ident);
854
855                 if (ident_cmp(&ai, &ci))
856                         status_printf_ln(s, GIT_COLOR_NORMAL,
857                                 _("%s"
858                                 "Author:    %.*s <%.*s>"),
859                                 ident_shown++ ? "" : "\n",
860                                 (int)(ai.name_end - ai.name_begin), ai.name_begin,
861                                 (int)(ai.mail_end - ai.mail_begin), ai.mail_begin);
862
863                 if (author_date_is_interesting())
864                         status_printf_ln(s, GIT_COLOR_NORMAL,
865                                 _("%s"
866                                 "Date:      %s"),
867                                 ident_shown++ ? "" : "\n",
868                                 show_ident_date(&ai, DATE_MODE(NORMAL)));
869
870                 if (!committer_ident_sufficiently_given())
871                         status_printf_ln(s, GIT_COLOR_NORMAL,
872                                 _("%s"
873                                 "Committer: %.*s <%.*s>"),
874                                 ident_shown++ ? "" : "\n",
875                                 (int)(ci.name_end - ci.name_begin), ci.name_begin,
876                                 (int)(ci.mail_end - ci.mail_begin), ci.mail_begin);
877
878                 status_printf_ln(s, GIT_COLOR_NORMAL, "%s", ""); /* Add new line for clarity */
879
880                 saved_color_setting = s->use_color;
881                 s->use_color = 0;
882                 committable = run_status(s->fp, index_file, prefix, 1, s);
883                 s->use_color = saved_color_setting;
884                 string_list_clear(&s->change, 1);
885         } else {
886                 struct object_id oid;
887                 const char *parent = "HEAD";
888
889                 if (!active_nr && read_cache() < 0)
890                         die(_("Cannot read index"));
891
892                 if (amend)
893                         parent = "HEAD^1";
894
895                 if (get_oid(parent, &oid)) {
896                         int i, ita_nr = 0;
897
898                         for (i = 0; i < active_nr; i++)
899                                 if (ce_intent_to_add(active_cache[i]))
900                                         ita_nr++;
901                         committable = active_nr - ita_nr > 0;
902                 } else {
903                         /*
904                          * Unless the user did explicitly request a submodule
905                          * ignore mode by passing a command line option we do
906                          * not ignore any changed submodule SHA-1s when
907                          * comparing index and parent, no matter what is
908                          * configured. Otherwise we won't commit any
909                          * submodules which were manually staged, which would
910                          * be really confusing.
911                          */
912                         struct diff_flags flags = DIFF_FLAGS_INIT;
913                         flags.override_submodule_config = 1;
914                         if (ignore_submodule_arg &&
915                             !strcmp(ignore_submodule_arg, "all"))
916                                 flags.ignore_submodules = 1;
917                         committable = index_differs_from(the_repository,
918                                                          parent, &flags, 1);
919                 }
920         }
921         strbuf_release(&committer_ident);
922
923         fclose(s->fp);
924
925         /*
926          * Reject an attempt to record a non-merge empty commit without
927          * explicit --allow-empty. In the cherry-pick case, it may be
928          * empty due to conflict resolution, which the user should okay.
929          */
930         if (!committable && whence != FROM_MERGE && !allow_empty &&
931             !(amend && is_a_merge(current_head))) {
932                 s->display_comment_prefix = old_display_comment_prefix;
933                 run_status(stdout, index_file, prefix, 0, s);
934                 if (amend)
935                         fputs(_(empty_amend_advice), stderr);
936                 else if (whence == FROM_CHERRY_PICK) {
937                         fputs(_(empty_cherry_pick_advice), stderr);
938                         if (!sequencer_in_use)
939                                 fputs(_(empty_cherry_pick_advice_single), stderr);
940                         else
941                                 fputs(_(empty_cherry_pick_advice_multi), stderr);
942                 }
943                 return 0;
944         }
945
946         if (!no_verify && find_hook("pre-commit")) {
947                 /*
948                  * Re-read the index as pre-commit hook could have updated it,
949                  * and write it out as a tree.  We must do this before we invoke
950                  * the editor and after we invoke run_status above.
951                  */
952                 discard_cache();
953         }
954         read_cache_from(index_file);
955
956         if (update_main_cache_tree(0)) {
957                 error(_("Error building trees"));
958                 return 0;
959         }
960
961         if (run_commit_hook(use_editor, index_file, "prepare-commit-msg",
962                             git_path_commit_editmsg(), hook_arg1, hook_arg2, NULL))
963                 return 0;
964
965         if (use_editor) {
966                 struct argv_array env = ARGV_ARRAY_INIT;
967
968                 argv_array_pushf(&env, "GIT_INDEX_FILE=%s", index_file);
969                 if (launch_editor(git_path_commit_editmsg(), NULL, env.argv)) {
970                         fprintf(stderr,
971                         _("Please supply the message using either -m or -F option.\n"));
972                         exit(1);
973                 }
974                 argv_array_clear(&env);
975         }
976
977         if (!no_verify &&
978             run_commit_hook(use_editor, index_file, "commit-msg", git_path_commit_editmsg(), NULL)) {
979                 return 0;
980         }
981
982         return 1;
983 }
984
985 static const char *find_author_by_nickname(const char *name)
986 {
987         struct rev_info revs;
988         struct commit *commit;
989         struct strbuf buf = STRBUF_INIT;
990         struct string_list mailmap = STRING_LIST_INIT_NODUP;
991         const char *av[20];
992         int ac = 0;
993
994         repo_init_revisions(the_repository, &revs, NULL);
995         strbuf_addf(&buf, "--author=%s", name);
996         av[++ac] = "--all";
997         av[++ac] = "-i";
998         av[++ac] = buf.buf;
999         av[++ac] = NULL;
1000         setup_revisions(ac, av, &revs, NULL);
1001         revs.mailmap = &mailmap;
1002         read_mailmap(revs.mailmap, NULL);
1003
1004         if (prepare_revision_walk(&revs))
1005                 die(_("revision walk setup failed"));
1006         commit = get_revision(&revs);
1007         if (commit) {
1008                 struct pretty_print_context ctx = {0};
1009                 ctx.date_mode.type = DATE_NORMAL;
1010                 strbuf_release(&buf);
1011                 format_commit_message(commit, "%aN <%aE>", &buf, &ctx);
1012                 clear_mailmap(&mailmap);
1013                 return strbuf_detach(&buf, NULL);
1014         }
1015         die(_("--author '%s' is not 'Name <email>' and matches no existing author"), name);
1016 }
1017
1018 static void handle_ignored_arg(struct wt_status *s)
1019 {
1020         if (!ignored_arg)
1021                 ; /* default already initialized */
1022         else if (!strcmp(ignored_arg, "traditional"))
1023                 s->show_ignored_mode = SHOW_TRADITIONAL_IGNORED;
1024         else if (!strcmp(ignored_arg, "no"))
1025                 s->show_ignored_mode = SHOW_NO_IGNORED;
1026         else if (!strcmp(ignored_arg, "matching"))
1027                 s->show_ignored_mode = SHOW_MATCHING_IGNORED;
1028         else
1029                 die(_("Invalid ignored mode '%s'"), ignored_arg);
1030 }
1031
1032 static void handle_untracked_files_arg(struct wt_status *s)
1033 {
1034         if (!untracked_files_arg)
1035                 ; /* default already initialized */
1036         else if (!strcmp(untracked_files_arg, "no"))
1037                 s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
1038         else if (!strcmp(untracked_files_arg, "normal"))
1039                 s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
1040         else if (!strcmp(untracked_files_arg, "all"))
1041                 s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
1042         /*
1043          * Please update $__git_untracked_file_modes in
1044          * git-completion.bash when you add new options
1045          */
1046         else
1047                 die(_("Invalid untracked files mode '%s'"), untracked_files_arg);
1048 }
1049
1050 static const char *read_commit_message(const char *name)
1051 {
1052         const char *out_enc;
1053         struct commit *commit;
1054
1055         commit = lookup_commit_reference_by_name(name);
1056         if (!commit)
1057                 die(_("could not lookup commit %s"), name);
1058         out_enc = get_commit_output_encoding();
1059         return logmsg_reencode(commit, NULL, out_enc);
1060 }
1061
1062 /*
1063  * Enumerate what needs to be propagated when --porcelain
1064  * is not in effect here.
1065  */
1066 static struct status_deferred_config {
1067         enum wt_status_format status_format;
1068         int show_branch;
1069 } status_deferred_config = {
1070         STATUS_FORMAT_UNSPECIFIED,
1071         -1 /* unspecified */
1072 };
1073
1074 static void finalize_deferred_config(struct wt_status *s)
1075 {
1076         int use_deferred_config = (status_format != STATUS_FORMAT_PORCELAIN &&
1077                                    status_format != STATUS_FORMAT_PORCELAIN_V2 &&
1078                                    !s->null_termination);
1079
1080         if (s->null_termination) {
1081                 if (status_format == STATUS_FORMAT_NONE ||
1082                     status_format == STATUS_FORMAT_UNSPECIFIED)
1083                         status_format = STATUS_FORMAT_PORCELAIN;
1084                 else if (status_format == STATUS_FORMAT_LONG)
1085                         die(_("--long and -z are incompatible"));
1086         }
1087
1088         if (use_deferred_config && status_format == STATUS_FORMAT_UNSPECIFIED)
1089                 status_format = status_deferred_config.status_format;
1090         if (status_format == STATUS_FORMAT_UNSPECIFIED)
1091                 status_format = STATUS_FORMAT_NONE;
1092
1093         if (use_deferred_config && s->show_branch < 0)
1094                 s->show_branch = status_deferred_config.show_branch;
1095         if (s->show_branch < 0)
1096                 s->show_branch = 0;
1097
1098         if (s->ahead_behind_flags == AHEAD_BEHIND_UNSPECIFIED)
1099                 s->ahead_behind_flags = AHEAD_BEHIND_FULL;
1100 }
1101
1102 static int parse_and_validate_options(int argc, const char *argv[],
1103                                       const struct option *options,
1104                                       const char * const usage[],
1105                                       const char *prefix,
1106                                       struct commit *current_head,
1107                                       struct wt_status *s)
1108 {
1109         int f = 0;
1110
1111         argc = parse_options(argc, argv, prefix, options, usage, 0);
1112         finalize_deferred_config(s);
1113
1114         if (force_author && !strchr(force_author, '>'))
1115                 force_author = find_author_by_nickname(force_author);
1116
1117         if (force_author && renew_authorship)
1118                 die(_("Using both --reset-author and --author does not make sense"));
1119
1120         if (logfile || have_option_m || use_message || fixup_message)
1121                 use_editor = 0;
1122         if (0 <= edit_flag)
1123                 use_editor = edit_flag;
1124
1125         /* Sanity check options */
1126         if (amend && !current_head)
1127                 die(_("You have nothing to amend."));
1128         if (amend && whence != FROM_COMMIT) {
1129                 if (whence == FROM_MERGE)
1130                         die(_("You are in the middle of a merge -- cannot amend."));
1131                 else if (whence == FROM_CHERRY_PICK)
1132                         die(_("You are in the middle of a cherry-pick -- cannot amend."));
1133         }
1134         if (fixup_message && squash_message)
1135                 die(_("Options --squash and --fixup cannot be used together"));
1136         if (use_message)
1137                 f++;
1138         if (edit_message)
1139                 f++;
1140         if (fixup_message)
1141                 f++;
1142         if (logfile)
1143                 f++;
1144         if (f > 1)
1145                 die(_("Only one of -c/-C/-F/--fixup can be used."));
1146         if (have_option_m && (edit_message || use_message || logfile))
1147                 die((_("Option -m cannot be combined with -c/-C/-F.")));
1148         if (f || have_option_m)
1149                 template_file = NULL;
1150         if (edit_message)
1151                 use_message = edit_message;
1152         if (amend && !use_message && !fixup_message)
1153                 use_message = "HEAD";
1154         if (!use_message && whence != FROM_CHERRY_PICK && renew_authorship)
1155                 die(_("--reset-author can be used only with -C, -c or --amend."));
1156         if (use_message) {
1157                 use_message_buffer = read_commit_message(use_message);
1158                 if (!renew_authorship) {
1159                         author_message = use_message;
1160                         author_message_buffer = use_message_buffer;
1161                 }
1162         }
1163         if (whence == FROM_CHERRY_PICK && !renew_authorship) {
1164                 author_message = "CHERRY_PICK_HEAD";
1165                 author_message_buffer = read_commit_message(author_message);
1166         }
1167
1168         if (patch_interactive)
1169                 interactive = 1;
1170
1171         if (also + only + all + interactive > 1)
1172                 die(_("Only one of --include/--only/--all/--interactive/--patch can be used."));
1173         if (argc == 0 && (also || (only && !amend && !allow_empty)))
1174                 die(_("No paths with --include/--only does not make sense."));
1175         if (!cleanup_arg || !strcmp(cleanup_arg, "default"))
1176                 cleanup_mode = use_editor ? COMMIT_MSG_CLEANUP_ALL :
1177                                             COMMIT_MSG_CLEANUP_SPACE;
1178         else if (!strcmp(cleanup_arg, "verbatim"))
1179                 cleanup_mode = COMMIT_MSG_CLEANUP_NONE;
1180         else if (!strcmp(cleanup_arg, "whitespace"))
1181                 cleanup_mode = COMMIT_MSG_CLEANUP_SPACE;
1182         else if (!strcmp(cleanup_arg, "strip"))
1183                 cleanup_mode = COMMIT_MSG_CLEANUP_ALL;
1184         else if (!strcmp(cleanup_arg, "scissors"))
1185                 cleanup_mode = use_editor ? COMMIT_MSG_CLEANUP_SCISSORS :
1186                                             COMMIT_MSG_CLEANUP_SPACE;
1187         /*
1188          * Please update _git_commit() in git-completion.bash when you
1189          * add new options.
1190          */
1191         else
1192                 die(_("Invalid cleanup mode %s"), cleanup_arg);
1193
1194         handle_untracked_files_arg(s);
1195
1196         if (all && argc > 0)
1197                 die(_("paths '%s ...' with -a does not make sense"),
1198                     argv[0]);
1199
1200         if (status_format != STATUS_FORMAT_NONE)
1201                 dry_run = 1;
1202
1203         return argc;
1204 }
1205
1206 static int dry_run_commit(int argc, const char **argv, const char *prefix,
1207                           const struct commit *current_head, struct wt_status *s)
1208 {
1209         int committable;
1210         const char *index_file;
1211
1212         index_file = prepare_index(argc, argv, prefix, current_head, 1);
1213         committable = run_status(stdout, index_file, prefix, 0, s);
1214         rollback_index_files();
1215
1216         return committable ? 0 : 1;
1217 }
1218
1219 define_list_config_array_extra(color_status_slots, {"added"});
1220
1221 static int parse_status_slot(const char *slot)
1222 {
1223         if (!strcasecmp(slot, "added"))
1224                 return WT_STATUS_UPDATED;
1225
1226         return LOOKUP_CONFIG(color_status_slots, slot);
1227 }
1228
1229 static int git_status_config(const char *k, const char *v, void *cb)
1230 {
1231         struct wt_status *s = cb;
1232         const char *slot_name;
1233
1234         if (starts_with(k, "column."))
1235                 return git_column_config(k, v, "status", &s->colopts);
1236         if (!strcmp(k, "status.submodulesummary")) {
1237                 int is_bool;
1238                 s->submodule_summary = git_config_bool_or_int(k, v, &is_bool);
1239                 if (is_bool && s->submodule_summary)
1240                         s->submodule_summary = -1;
1241                 return 0;
1242         }
1243         if (!strcmp(k, "status.short")) {
1244                 if (git_config_bool(k, v))
1245                         status_deferred_config.status_format = STATUS_FORMAT_SHORT;
1246                 else
1247                         status_deferred_config.status_format = STATUS_FORMAT_NONE;
1248                 return 0;
1249         }
1250         if (!strcmp(k, "status.branch")) {
1251                 status_deferred_config.show_branch = git_config_bool(k, v);
1252                 return 0;
1253         }
1254         if (!strcmp(k, "status.showstash")) {
1255                 s->show_stash = git_config_bool(k, v);
1256                 return 0;
1257         }
1258         if (!strcmp(k, "status.color") || !strcmp(k, "color.status")) {
1259                 s->use_color = git_config_colorbool(k, v);
1260                 return 0;
1261         }
1262         if (!strcmp(k, "status.displaycommentprefix")) {
1263                 s->display_comment_prefix = git_config_bool(k, v);
1264                 return 0;
1265         }
1266         if (skip_prefix(k, "status.color.", &slot_name) ||
1267             skip_prefix(k, "color.status.", &slot_name)) {
1268                 int slot = parse_status_slot(slot_name);
1269                 if (slot < 0)
1270                         return 0;
1271                 if (!v)
1272                         return config_error_nonbool(k);
1273                 return color_parse(v, s->color_palette[slot]);
1274         }
1275         if (!strcmp(k, "status.relativepaths")) {
1276                 s->relative_paths = git_config_bool(k, v);
1277                 return 0;
1278         }
1279         if (!strcmp(k, "status.showuntrackedfiles")) {
1280                 if (!v)
1281                         return config_error_nonbool(k);
1282                 else if (!strcmp(v, "no"))
1283                         s->show_untracked_files = SHOW_NO_UNTRACKED_FILES;
1284                 else if (!strcmp(v, "normal"))
1285                         s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
1286                 else if (!strcmp(v, "all"))
1287                         s->show_untracked_files = SHOW_ALL_UNTRACKED_FILES;
1288                 else
1289                         return error(_("Invalid untracked files mode '%s'"), v);
1290                 return 0;
1291         }
1292         if (!strcmp(k, "diff.renamelimit")) {
1293                 if (s->rename_limit == -1)
1294                         s->rename_limit = git_config_int(k, v);
1295                 return 0;
1296         }
1297         if (!strcmp(k, "status.renamelimit")) {
1298                 s->rename_limit = git_config_int(k, v);
1299                 return 0;
1300         }
1301         if (!strcmp(k, "diff.renames")) {
1302                 if (s->detect_rename == -1)
1303                         s->detect_rename = git_config_rename(k, v);
1304                 return 0;
1305         }
1306         if (!strcmp(k, "status.renames")) {
1307                 s->detect_rename = git_config_rename(k, v);
1308                 return 0;
1309         }
1310         return git_diff_ui_config(k, v, NULL);
1311 }
1312
1313 int cmd_status(int argc, const char **argv, const char *prefix)
1314 {
1315         static int no_renames = -1;
1316         static const char *rename_score_arg = (const char *)-1;
1317         static struct wt_status s;
1318         unsigned int progress_flag = 0;
1319         int fd;
1320         struct object_id oid;
1321         static struct option builtin_status_options[] = {
1322                 OPT__VERBOSE(&verbose, N_("be verbose")),
1323                 OPT_SET_INT('s', "short", &status_format,
1324                             N_("show status concisely"), STATUS_FORMAT_SHORT),
1325                 OPT_BOOL('b', "branch", &s.show_branch,
1326                          N_("show branch information")),
1327                 OPT_BOOL(0, "show-stash", &s.show_stash,
1328                          N_("show stash information")),
1329                 OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
1330                          N_("compute full ahead/behind values")),
1331                 { OPTION_CALLBACK, 0, "porcelain", &status_format,
1332                   N_("version"), N_("machine-readable output"),
1333                   PARSE_OPT_OPTARG, opt_parse_porcelain },
1334                 OPT_SET_INT(0, "long", &status_format,
1335                             N_("show status in long format (default)"),
1336                             STATUS_FORMAT_LONG),
1337                 OPT_BOOL('z', "null", &s.null_termination,
1338                          N_("terminate entries with NUL")),
1339                 { OPTION_STRING, 'u', "untracked-files", &untracked_files_arg,
1340                   N_("mode"),
1341                   N_("show untracked files, optional modes: all, normal, no. (Default: all)"),
1342                   PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
1343                 { OPTION_STRING, 0, "ignored", &ignored_arg,
1344                   N_("mode"),
1345                   N_("show ignored files, optional modes: traditional, matching, no. (Default: traditional)"),
1346                   PARSE_OPT_OPTARG, NULL, (intptr_t)"traditional" },
1347                 { OPTION_STRING, 0, "ignore-submodules", &ignore_submodule_arg, N_("when"),
1348                   N_("ignore changes to submodules, optional when: all, dirty, untracked. (Default: all)"),
1349                   PARSE_OPT_OPTARG, NULL, (intptr_t)"all" },
1350                 OPT_COLUMN(0, "column", &s.colopts, N_("list untracked files in columns")),
1351                 OPT_BOOL(0, "no-renames", &no_renames, N_("do not detect renames")),
1352                 { OPTION_CALLBACK, 'M', "find-renames", &rename_score_arg,
1353                   N_("n"), N_("detect renames, optionally set similarity index"),
1354                   PARSE_OPT_OPTARG | PARSE_OPT_NONEG, opt_parse_rename_score },
1355                 OPT_END(),
1356         };
1357
1358         if (argc == 2 && !strcmp(argv[1], "-h"))
1359                 usage_with_options(builtin_status_usage, builtin_status_options);
1360
1361         status_init_config(&s, git_status_config);
1362         argc = parse_options(argc, argv, prefix,
1363                              builtin_status_options,
1364                              builtin_status_usage, 0);
1365         finalize_colopts(&s.colopts, -1);
1366         finalize_deferred_config(&s);
1367
1368         handle_untracked_files_arg(&s);
1369         handle_ignored_arg(&s);
1370
1371         if (s.show_ignored_mode == SHOW_MATCHING_IGNORED &&
1372             s.show_untracked_files == SHOW_NO_UNTRACKED_FILES)
1373                 die(_("Unsupported combination of ignored and untracked-files arguments"));
1374
1375         parse_pathspec(&s.pathspec, 0,
1376                        PATHSPEC_PREFER_FULL,
1377                        prefix, argv);
1378
1379         if (status_format != STATUS_FORMAT_PORCELAIN &&
1380             status_format != STATUS_FORMAT_PORCELAIN_V2)
1381                 progress_flag = REFRESH_PROGRESS;
1382         repo_read_index(the_repository);
1383         refresh_index(&the_index,
1384                       REFRESH_QUIET|REFRESH_UNMERGED|progress_flag,
1385                       &s.pathspec, NULL, NULL);
1386
1387         if (use_optional_locks())
1388                 fd = hold_locked_index(&index_lock, 0);
1389         else
1390                 fd = -1;
1391
1392         s.is_initial = get_oid(s.reference, &oid) ? 1 : 0;
1393         if (!s.is_initial)
1394                 hashcpy(s.sha1_commit, oid.hash);
1395
1396         s.ignore_submodule_arg = ignore_submodule_arg;
1397         s.status_format = status_format;
1398         s.verbose = verbose;
1399         if (no_renames != -1)
1400                 s.detect_rename = !no_renames;
1401         if ((intptr_t)rename_score_arg != -1) {
1402                 if (s.detect_rename < DIFF_DETECT_RENAME)
1403                         s.detect_rename = DIFF_DETECT_RENAME;
1404                 if (rename_score_arg)
1405                         s.rename_score = parse_rename_score(&rename_score_arg);
1406         }
1407
1408         wt_status_collect(&s);
1409
1410         if (0 <= fd)
1411                 repo_update_index_if_able(the_repository, &index_lock);
1412
1413         if (s.relative_paths)
1414                 s.prefix = prefix;
1415
1416         wt_status_print(&s);
1417         wt_status_collect_free_buffers(&s);
1418
1419         return 0;
1420 }
1421
1422 static int git_commit_config(const char *k, const char *v, void *cb)
1423 {
1424         struct wt_status *s = cb;
1425         int status;
1426
1427         if (!strcmp(k, "commit.template"))
1428                 return git_config_pathname(&template_file, k, v);
1429         if (!strcmp(k, "commit.status")) {
1430                 include_status = git_config_bool(k, v);
1431                 return 0;
1432         }
1433         if (!strcmp(k, "commit.cleanup"))
1434                 return git_config_string(&cleanup_arg, k, v);
1435         if (!strcmp(k, "commit.gpgsign")) {
1436                 sign_commit = git_config_bool(k, v) ? "" : NULL;
1437                 return 0;
1438         }
1439         if (!strcmp(k, "commit.verbose")) {
1440                 int is_bool;
1441                 config_commit_verbose = git_config_bool_or_int(k, v, &is_bool);
1442                 return 0;
1443         }
1444
1445         status = git_gpg_config(k, v, NULL);
1446         if (status)
1447                 return status;
1448         return git_status_config(k, v, s);
1449 }
1450
1451 int run_commit_hook(int editor_is_used, const char *index_file, const char *name, ...)
1452 {
1453         struct argv_array hook_env = ARGV_ARRAY_INIT;
1454         va_list args;
1455         int ret;
1456
1457         argv_array_pushf(&hook_env, "GIT_INDEX_FILE=%s", index_file);
1458
1459         /*
1460          * Let the hook know that no editor will be launched.
1461          */
1462         if (!editor_is_used)
1463                 argv_array_push(&hook_env, "GIT_EDITOR=:");
1464
1465         va_start(args, name);
1466         ret = run_hook_ve(hook_env.argv,name, args);
1467         va_end(args);
1468         argv_array_clear(&hook_env);
1469
1470         return ret;
1471 }
1472
1473 int cmd_commit(int argc, const char **argv, const char *prefix)
1474 {
1475         const char *argv_gc_auto[] = {"gc", "--auto", NULL};
1476         static struct wt_status s;
1477         static struct option builtin_commit_options[] = {
1478                 OPT__QUIET(&quiet, N_("suppress summary after successful commit")),
1479                 OPT__VERBOSE(&verbose, N_("show diff in commit message template")),
1480
1481                 OPT_GROUP(N_("Commit message options")),
1482                 OPT_FILENAME('F', "file", &logfile, N_("read message from file")),
1483                 OPT_STRING(0, "author", &force_author, N_("author"), N_("override author for commit")),
1484                 OPT_STRING(0, "date", &force_date, N_("date"), N_("override date for commit")),
1485                 OPT_CALLBACK('m', "message", &message, N_("message"), N_("commit message"), opt_parse_m),
1486                 OPT_STRING('c', "reedit-message", &edit_message, N_("commit"), N_("reuse and edit message from specified commit")),
1487                 OPT_STRING('C', "reuse-message", &use_message, N_("commit"), N_("reuse message from specified commit")),
1488                 OPT_STRING(0, "fixup", &fixup_message, N_("commit"), N_("use autosquash formatted message to fixup specified commit")),
1489                 OPT_STRING(0, "squash", &squash_message, N_("commit"), N_("use autosquash formatted message to squash specified commit")),
1490                 OPT_BOOL(0, "reset-author", &renew_authorship, N_("the commit is authored by me now (used with -C/-c/--amend)")),
1491                 OPT_BOOL('s', "signoff", &signoff, N_("add Signed-off-by:")),
1492                 OPT_FILENAME('t', "template", &template_file, N_("use specified template file")),
1493                 OPT_BOOL('e', "edit", &edit_flag, N_("force edit of commit")),
1494                 OPT_STRING(0, "cleanup", &cleanup_arg, N_("default"), N_("how to strip spaces and #comments from message")),
1495                 OPT_BOOL(0, "status", &include_status, N_("include status in commit message template")),
1496                 { OPTION_STRING, 'S', "gpg-sign", &sign_commit, N_("key-id"),
1497                   N_("GPG sign commit"), PARSE_OPT_OPTARG, NULL, (intptr_t) "" },
1498                 /* end commit message options */
1499
1500                 OPT_GROUP(N_("Commit contents options")),
1501                 OPT_BOOL('a', "all", &all, N_("commit all changed files")),
1502                 OPT_BOOL('i', "include", &also, N_("add specified files to index for commit")),
1503                 OPT_BOOL(0, "interactive", &interactive, N_("interactively add files")),
1504                 OPT_BOOL('p', "patch", &patch_interactive, N_("interactively add changes")),
1505                 OPT_BOOL('o', "only", &only, N_("commit only specified files")),
1506                 OPT_BOOL('n', "no-verify", &no_verify, N_("bypass pre-commit and commit-msg hooks")),
1507                 OPT_BOOL(0, "dry-run", &dry_run, N_("show what would be committed")),
1508                 OPT_SET_INT(0, "short", &status_format, N_("show status concisely"),
1509                             STATUS_FORMAT_SHORT),
1510                 OPT_BOOL(0, "branch", &s.show_branch, N_("show branch information")),
1511                 OPT_BOOL(0, "ahead-behind", &s.ahead_behind_flags,
1512                          N_("compute full ahead/behind values")),
1513                 OPT_SET_INT(0, "porcelain", &status_format,
1514                             N_("machine-readable output"), STATUS_FORMAT_PORCELAIN),
1515                 OPT_SET_INT(0, "long", &status_format,
1516                             N_("show status in long format (default)"),
1517                             STATUS_FORMAT_LONG),
1518                 OPT_BOOL('z', "null", &s.null_termination,
1519                          N_("terminate entries with NUL")),
1520                 OPT_BOOL(0, "amend", &amend, N_("amend previous commit")),
1521                 OPT_BOOL(0, "no-post-rewrite", &no_post_rewrite, N_("bypass post-rewrite hook")),
1522                 { 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" },
1523                 /* end commit contents options */
1524
1525                 OPT_HIDDEN_BOOL(0, "allow-empty", &allow_empty,
1526                                 N_("ok to record an empty change")),
1527                 OPT_HIDDEN_BOOL(0, "allow-empty-message", &allow_empty_message,
1528                                 N_("ok to record a change with an empty message")),
1529
1530                 OPT_END()
1531         };
1532
1533         struct strbuf sb = STRBUF_INIT;
1534         struct strbuf author_ident = STRBUF_INIT;
1535         const char *index_file, *reflog_msg;
1536         struct object_id oid;
1537         struct commit_list *parents = NULL;
1538         struct stat statbuf;
1539         struct commit *current_head = NULL;
1540         struct commit_extra_header *extra = NULL;
1541         struct strbuf err = STRBUF_INIT;
1542
1543         if (argc == 2 && !strcmp(argv[1], "-h"))
1544                 usage_with_options(builtin_commit_usage, builtin_commit_options);
1545
1546         status_init_config(&s, git_commit_config);
1547         s.commit_template = 1;
1548         status_format = STATUS_FORMAT_NONE; /* Ignore status.short */
1549         s.colopts = 0;
1550
1551         if (get_oid("HEAD", &oid))
1552                 current_head = NULL;
1553         else {
1554                 current_head = lookup_commit_or_die(&oid, "HEAD");
1555                 if (parse_commit(current_head))
1556                         die(_("could not parse HEAD commit"));
1557         }
1558         verbose = -1; /* unspecified */
1559         argc = parse_and_validate_options(argc, argv, builtin_commit_options,
1560                                           builtin_commit_usage,
1561                                           prefix, current_head, &s);
1562         if (verbose == -1)
1563                 verbose = (config_commit_verbose < 0) ? 0 : config_commit_verbose;
1564
1565         if (dry_run)
1566                 return dry_run_commit(argc, argv, prefix, current_head, &s);
1567         index_file = prepare_index(argc, argv, prefix, current_head, 0);
1568
1569         /* Set up everything for writing the commit object.  This includes
1570            running hooks, writing the trees, and interacting with the user.  */
1571         if (!prepare_to_commit(index_file, prefix,
1572                                current_head, &s, &author_ident)) {
1573                 rollback_index_files();
1574                 return 1;
1575         }
1576
1577         /* Determine parents */
1578         reflog_msg = getenv("GIT_REFLOG_ACTION");
1579         if (!current_head) {
1580                 if (!reflog_msg)
1581                         reflog_msg = "commit (initial)";
1582         } else if (amend) {
1583                 if (!reflog_msg)
1584                         reflog_msg = "commit (amend)";
1585                 parents = copy_commit_list(current_head->parents);
1586         } else if (whence == FROM_MERGE) {
1587                 struct strbuf m = STRBUF_INIT;
1588                 FILE *fp;
1589                 int allow_fast_forward = 1;
1590                 struct commit_list **pptr = &parents;
1591
1592                 if (!reflog_msg)
1593                         reflog_msg = "commit (merge)";
1594                 pptr = commit_list_append(current_head, pptr);
1595                 fp = xfopen(git_path_merge_head(the_repository), "r");
1596                 while (strbuf_getline_lf(&m, fp) != EOF) {
1597                         struct commit *parent;
1598
1599                         parent = get_merge_parent(m.buf);
1600                         if (!parent)
1601                                 die(_("Corrupt MERGE_HEAD file (%s)"), m.buf);
1602                         pptr = commit_list_append(parent, pptr);
1603                 }
1604                 fclose(fp);
1605                 strbuf_release(&m);
1606                 if (!stat(git_path_merge_mode(the_repository), &statbuf)) {
1607                         if (strbuf_read_file(&sb, git_path_merge_mode(the_repository), 0) < 0)
1608                                 die_errno(_("could not read MERGE_MODE"));
1609                         if (!strcmp(sb.buf, "no-ff"))
1610                                 allow_fast_forward = 0;
1611                 }
1612                 if (allow_fast_forward)
1613                         reduce_heads_replace(&parents);
1614         } else {
1615                 if (!reflog_msg)
1616                         reflog_msg = (whence == FROM_CHERRY_PICK)
1617                                         ? "commit (cherry-pick)"
1618                                         : "commit";
1619                 commit_list_insert(current_head, &parents);
1620         }
1621
1622         /* Finally, get the commit message */
1623         strbuf_reset(&sb);
1624         if (strbuf_read_file(&sb, git_path_commit_editmsg(), 0) < 0) {
1625                 int saved_errno = errno;
1626                 rollback_index_files();
1627                 die(_("could not read commit message: %s"), strerror(saved_errno));
1628         }
1629
1630         if (verbose || /* Truncate the message just before the diff, if any. */
1631             cleanup_mode == COMMIT_MSG_CLEANUP_SCISSORS)
1632                 strbuf_setlen(&sb, wt_status_locate_end(sb.buf, sb.len));
1633         if (cleanup_mode != COMMIT_MSG_CLEANUP_NONE)
1634                 strbuf_stripspace(&sb, cleanup_mode == COMMIT_MSG_CLEANUP_ALL);
1635
1636         if (message_is_empty(&sb, cleanup_mode) && !allow_empty_message) {
1637                 rollback_index_files();
1638                 fprintf(stderr, _("Aborting commit due to empty commit message.\n"));
1639                 exit(1);
1640         }
1641         if (template_untouched(&sb, template_file, cleanup_mode) && !allow_empty_message) {
1642                 rollback_index_files();
1643                 fprintf(stderr, _("Aborting commit; you did not edit the message.\n"));
1644                 exit(1);
1645         }
1646
1647         if (amend) {
1648                 const char *exclude_gpgsig[2] = { "gpgsig", NULL };
1649                 extra = read_commit_extra_headers(current_head, exclude_gpgsig);
1650         } else {
1651                 struct commit_extra_header **tail = &extra;
1652                 append_merge_tag_headers(parents, &tail);
1653         }
1654
1655         if (commit_tree_extended(sb.buf, sb.len, &active_cache_tree->oid,
1656                                  parents, &oid, author_ident.buf, sign_commit,
1657                                  extra)) {
1658                 rollback_index_files();
1659                 die(_("failed to write commit object"));
1660         }
1661         strbuf_release(&author_ident);
1662         free_commit_extra_headers(extra);
1663
1664         if (update_head_with_reflog(current_head, &oid, reflog_msg, &sb,
1665                                     &err)) {
1666                 rollback_index_files();
1667                 die("%s", err.buf);
1668         }
1669
1670         unlink(git_path_cherry_pick_head(the_repository));
1671         unlink(git_path_revert_head(the_repository));
1672         unlink(git_path_merge_head(the_repository));
1673         unlink(git_path_merge_msg(the_repository));
1674         unlink(git_path_merge_mode(the_repository));
1675         unlink(git_path_squash_msg(the_repository));
1676
1677         if (commit_index_files())
1678                 die(_("repository has been updated, but unable to write\n"
1679                       "new_index file. Check that disk is not full and quota is\n"
1680                       "not exceeded, and then \"git reset HEAD\" to recover."));
1681
1682         if (git_env_bool(GIT_TEST_COMMIT_GRAPH, 0))
1683                 write_commit_graph_reachable(get_object_directory(), 0, 0);
1684
1685         repo_rerere(the_repository, 0);
1686         run_command_v_opt(argv_gc_auto, RUN_GIT_CMD);
1687         run_commit_hook(use_editor, get_index_file(), "post-commit", NULL);
1688         if (amend && !no_post_rewrite) {
1689                 commit_post_rewrite(the_repository, current_head, &oid);
1690         }
1691         if (!quiet) {
1692                 unsigned int flags = 0;
1693
1694                 if (!current_head)
1695                         flags |= SUMMARY_INITIAL_COMMIT;
1696                 if (author_date_is_interesting())
1697                         flags |= SUMMARY_SHOW_AUTHOR_DATE;
1698                 print_commit_summary(the_repository, prefix,
1699                                      &oid, flags);
1700         }
1701
1702         UNLEAK(err);
1703         UNLEAK(sb);
1704         return 0;
1705 }