Merge branch 'dg/subtree-rebase-test'
[git] / wt-status.c
1 #include "cache.h"
2 #include "wt-status.h"
3 #include "object.h"
4 #include "dir.h"
5 #include "commit.h"
6 #include "diff.h"
7 #include "revision.h"
8 #include "diffcore.h"
9 #include "quote.h"
10 #include "run-command.h"
11 #include "argv-array.h"
12 #include "remote.h"
13 #include "refs.h"
14 #include "submodule.h"
15 #include "column.h"
16 #include "strbuf.h"
17 #include "utf8.h"
18 #include "worktree.h"
19
20 static const char cut_line[] =
21 "------------------------ >8 ------------------------\n";
22
23 static char default_wt_status_colors[][COLOR_MAXLEN] = {
24         GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
25         GIT_COLOR_GREEN,  /* WT_STATUS_UPDATED */
26         GIT_COLOR_RED,    /* WT_STATUS_CHANGED */
27         GIT_COLOR_RED,    /* WT_STATUS_UNTRACKED */
28         GIT_COLOR_RED,    /* WT_STATUS_NOBRANCH */
29         GIT_COLOR_RED,    /* WT_STATUS_UNMERGED */
30         GIT_COLOR_GREEN,  /* WT_STATUS_LOCAL_BRANCH */
31         GIT_COLOR_RED,    /* WT_STATUS_REMOTE_BRANCH */
32         GIT_COLOR_NIL,    /* WT_STATUS_ONBRANCH */
33 };
34
35 static const char *color(int slot, struct wt_status *s)
36 {
37         const char *c = "";
38         if (want_color(s->use_color))
39                 c = s->color_palette[slot];
40         if (slot == WT_STATUS_ONBRANCH && color_is_nil(c))
41                 c = s->color_palette[WT_STATUS_HEADER];
42         return c;
43 }
44
45 static void status_vprintf(struct wt_status *s, int at_bol, const char *color,
46                 const char *fmt, va_list ap, const char *trail)
47 {
48         struct strbuf sb = STRBUF_INIT;
49         struct strbuf linebuf = STRBUF_INIT;
50         const char *line, *eol;
51
52         strbuf_vaddf(&sb, fmt, ap);
53         if (!sb.len) {
54                 if (s->display_comment_prefix) {
55                         strbuf_addch(&sb, comment_line_char);
56                         if (!trail)
57                                 strbuf_addch(&sb, ' ');
58                 }
59                 color_print_strbuf(s->fp, color, &sb);
60                 if (trail)
61                         fprintf(s->fp, "%s", trail);
62                 strbuf_release(&sb);
63                 return;
64         }
65         for (line = sb.buf; *line; line = eol + 1) {
66                 eol = strchr(line, '\n');
67
68                 strbuf_reset(&linebuf);
69                 if (at_bol && s->display_comment_prefix) {
70                         strbuf_addch(&linebuf, comment_line_char);
71                         if (*line != '\n' && *line != '\t')
72                                 strbuf_addch(&linebuf, ' ');
73                 }
74                 if (eol)
75                         strbuf_add(&linebuf, line, eol - line);
76                 else
77                         strbuf_addstr(&linebuf, line);
78                 color_print_strbuf(s->fp, color, &linebuf);
79                 if (eol)
80                         fprintf(s->fp, "\n");
81                 else
82                         break;
83                 at_bol = 1;
84         }
85         if (trail)
86                 fprintf(s->fp, "%s", trail);
87         strbuf_release(&linebuf);
88         strbuf_release(&sb);
89 }
90
91 void status_printf_ln(struct wt_status *s, const char *color,
92                         const char *fmt, ...)
93 {
94         va_list ap;
95
96         va_start(ap, fmt);
97         status_vprintf(s, 1, color, fmt, ap, "\n");
98         va_end(ap);
99 }
100
101 void status_printf(struct wt_status *s, const char *color,
102                         const char *fmt, ...)
103 {
104         va_list ap;
105
106         va_start(ap, fmt);
107         status_vprintf(s, 1, color, fmt, ap, NULL);
108         va_end(ap);
109 }
110
111 static void status_printf_more(struct wt_status *s, const char *color,
112                                const char *fmt, ...)
113 {
114         va_list ap;
115
116         va_start(ap, fmt);
117         status_vprintf(s, 0, color, fmt, ap, NULL);
118         va_end(ap);
119 }
120
121 void wt_status_prepare(struct wt_status *s)
122 {
123         unsigned char sha1[20];
124
125         memset(s, 0, sizeof(*s));
126         memcpy(s->color_palette, default_wt_status_colors,
127                sizeof(default_wt_status_colors));
128         s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
129         s->use_color = -1;
130         s->relative_paths = 1;
131         s->branch = resolve_refdup("HEAD", 0, sha1, NULL);
132         s->reference = "HEAD";
133         s->fp = stdout;
134         s->index_file = get_index_file();
135         s->change.strdup_strings = 1;
136         s->untracked.strdup_strings = 1;
137         s->ignored.strdup_strings = 1;
138         s->show_branch = -1;  /* unspecified */
139         s->display_comment_prefix = 0;
140 }
141
142 static void wt_status_print_unmerged_header(struct wt_status *s)
143 {
144         int i;
145         int del_mod_conflict = 0;
146         int both_deleted = 0;
147         int not_deleted = 0;
148         const char *c = color(WT_STATUS_HEADER, s);
149
150         status_printf_ln(s, c, _("Unmerged paths:"));
151
152         for (i = 0; i < s->change.nr; i++) {
153                 struct string_list_item *it = &(s->change.items[i]);
154                 struct wt_status_change_data *d = it->util;
155
156                 switch (d->stagemask) {
157                 case 0:
158                         break;
159                 case 1:
160                         both_deleted = 1;
161                         break;
162                 case 3:
163                 case 5:
164                         del_mod_conflict = 1;
165                         break;
166                 default:
167                         not_deleted = 1;
168                         break;
169                 }
170         }
171
172         if (!s->hints)
173                 return;
174         if (s->whence != FROM_COMMIT)
175                 ;
176         else if (!s->is_initial)
177                 status_printf_ln(s, c, _("  (use \"git reset %s <file>...\" to unstage)"), s->reference);
178         else
179                 status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
180
181         if (!both_deleted) {
182                 if (!del_mod_conflict)
183                         status_printf_ln(s, c, _("  (use \"git add <file>...\" to mark resolution)"));
184                 else
185                         status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
186         } else if (!del_mod_conflict && !not_deleted) {
187                 status_printf_ln(s, c, _("  (use \"git rm <file>...\" to mark resolution)"));
188         } else {
189                 status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
190         }
191         status_printf_ln(s, c, "%s", "");
192 }
193
194 static void wt_status_print_cached_header(struct wt_status *s)
195 {
196         const char *c = color(WT_STATUS_HEADER, s);
197
198         status_printf_ln(s, c, _("Changes to be committed:"));
199         if (!s->hints)
200                 return;
201         if (s->whence != FROM_COMMIT)
202                 ; /* NEEDSWORK: use "git reset --unresolve"??? */
203         else if (!s->is_initial)
204                 status_printf_ln(s, c, _("  (use \"git reset %s <file>...\" to unstage)"), s->reference);
205         else
206                 status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
207         status_printf_ln(s, c, "%s", "");
208 }
209
210 static void wt_status_print_dirty_header(struct wt_status *s,
211                                          int has_deleted,
212                                          int has_dirty_submodules)
213 {
214         const char *c = color(WT_STATUS_HEADER, s);
215
216         status_printf_ln(s, c, _("Changes not staged for commit:"));
217         if (!s->hints)
218                 return;
219         if (!has_deleted)
220                 status_printf_ln(s, c, _("  (use \"git add <file>...\" to update what will be committed)"));
221         else
222                 status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" to update what will be committed)"));
223         status_printf_ln(s, c, _("  (use \"git checkout -- <file>...\" to discard changes in working directory)"));
224         if (has_dirty_submodules)
225                 status_printf_ln(s, c, _("  (commit or discard the untracked or modified content in submodules)"));
226         status_printf_ln(s, c, "%s", "");
227 }
228
229 static void wt_status_print_other_header(struct wt_status *s,
230                                          const char *what,
231                                          const char *how)
232 {
233         const char *c = color(WT_STATUS_HEADER, s);
234         status_printf_ln(s, c, "%s:", what);
235         if (!s->hints)
236                 return;
237         status_printf_ln(s, c, _("  (use \"git %s <file>...\" to include in what will be committed)"), how);
238         status_printf_ln(s, c, "%s", "");
239 }
240
241 static void wt_status_print_trailer(struct wt_status *s)
242 {
243         status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
244 }
245
246 #define quote_path quote_path_relative
247
248 static const char *wt_status_unmerged_status_string(int stagemask)
249 {
250         switch (stagemask) {
251         case 1:
252                 return _("both deleted:");
253         case 2:
254                 return _("added by us:");
255         case 3:
256                 return _("deleted by them:");
257         case 4:
258                 return _("added by them:");
259         case 5:
260                 return _("deleted by us:");
261         case 6:
262                 return _("both added:");
263         case 7:
264                 return _("both modified:");
265         default:
266                 die("bug: unhandled unmerged status %x", stagemask);
267         }
268 }
269
270 static const char *wt_status_diff_status_string(int status)
271 {
272         switch (status) {
273         case DIFF_STATUS_ADDED:
274                 return _("new file:");
275         case DIFF_STATUS_COPIED:
276                 return _("copied:");
277         case DIFF_STATUS_DELETED:
278                 return _("deleted:");
279         case DIFF_STATUS_MODIFIED:
280                 return _("modified:");
281         case DIFF_STATUS_RENAMED:
282                 return _("renamed:");
283         case DIFF_STATUS_TYPE_CHANGED:
284                 return _("typechange:");
285         case DIFF_STATUS_UNKNOWN:
286                 return _("unknown:");
287         case DIFF_STATUS_UNMERGED:
288                 return _("unmerged:");
289         default:
290                 return NULL;
291         }
292 }
293
294 static int maxwidth(const char *(*label)(int), int minval, int maxval)
295 {
296         int result = 0, i;
297
298         for (i = minval; i <= maxval; i++) {
299                 const char *s = label(i);
300                 int len = s ? utf8_strwidth(s) : 0;
301                 if (len > result)
302                         result = len;
303         }
304         return result;
305 }
306
307 static void wt_status_print_unmerged_data(struct wt_status *s,
308                                           struct string_list_item *it)
309 {
310         const char *c = color(WT_STATUS_UNMERGED, s);
311         struct wt_status_change_data *d = it->util;
312         struct strbuf onebuf = STRBUF_INIT;
313         static char *padding;
314         static int label_width;
315         const char *one, *how;
316         int len;
317
318         if (!padding) {
319                 label_width = maxwidth(wt_status_unmerged_status_string, 1, 7);
320                 label_width += strlen(" ");
321                 padding = xmallocz(label_width);
322                 memset(padding, ' ', label_width);
323         }
324
325         one = quote_path(it->string, s->prefix, &onebuf);
326         status_printf(s, color(WT_STATUS_HEADER, s), "\t");
327
328         how = wt_status_unmerged_status_string(d->stagemask);
329         len = label_width - utf8_strwidth(how);
330         status_printf_more(s, c, "%s%.*s%s\n", how, len, padding, one);
331         strbuf_release(&onebuf);
332 }
333
334 static void wt_status_print_change_data(struct wt_status *s,
335                                         int change_type,
336                                         struct string_list_item *it)
337 {
338         struct wt_status_change_data *d = it->util;
339         const char *c = color(change_type, s);
340         int status;
341         char *one_name;
342         char *two_name;
343         const char *one, *two;
344         struct strbuf onebuf = STRBUF_INIT, twobuf = STRBUF_INIT;
345         struct strbuf extra = STRBUF_INIT;
346         static char *padding;
347         static int label_width;
348         const char *what;
349         int len;
350
351         if (!padding) {
352                 /* If DIFF_STATUS_* uses outside the range [A..Z], we're in trouble */
353                 label_width = maxwidth(wt_status_diff_status_string, 'A', 'Z');
354                 label_width += strlen(" ");
355                 padding = xmallocz(label_width);
356                 memset(padding, ' ', label_width);
357         }
358
359         one_name = two_name = it->string;
360         switch (change_type) {
361         case WT_STATUS_UPDATED:
362                 status = d->index_status;
363                 if (d->head_path)
364                         one_name = d->head_path;
365                 break;
366         case WT_STATUS_CHANGED:
367                 if (d->new_submodule_commits || d->dirty_submodule) {
368                         strbuf_addstr(&extra, " (");
369                         if (d->new_submodule_commits)
370                                 strbuf_addf(&extra, _("new commits, "));
371                         if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
372                                 strbuf_addf(&extra, _("modified content, "));
373                         if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
374                                 strbuf_addf(&extra, _("untracked content, "));
375                         strbuf_setlen(&extra, extra.len - 2);
376                         strbuf_addch(&extra, ')');
377                 }
378                 status = d->worktree_status;
379                 break;
380         default:
381                 die("BUG: unhandled change_type %d in wt_status_print_change_data",
382                     change_type);
383         }
384
385         one = quote_path(one_name, s->prefix, &onebuf);
386         two = quote_path(two_name, s->prefix, &twobuf);
387
388         status_printf(s, color(WT_STATUS_HEADER, s), "\t");
389         what = wt_status_diff_status_string(status);
390         if (!what)
391                 die("bug: unhandled diff status %c", status);
392         len = label_width - utf8_strwidth(what);
393         assert(len >= 0);
394         if (status == DIFF_STATUS_COPIED || status == DIFF_STATUS_RENAMED)
395                 status_printf_more(s, c, "%s%.*s%s -> %s",
396                                    what, len, padding, one, two);
397         else
398                 status_printf_more(s, c, "%s%.*s%s",
399                                    what, len, padding, one);
400         if (extra.len) {
401                 status_printf_more(s, color(WT_STATUS_HEADER, s), "%s", extra.buf);
402                 strbuf_release(&extra);
403         }
404         status_printf_more(s, GIT_COLOR_NORMAL, "\n");
405         strbuf_release(&onebuf);
406         strbuf_release(&twobuf);
407 }
408
409 static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
410                                          struct diff_options *options,
411                                          void *data)
412 {
413         struct wt_status *s = data;
414         int i;
415
416         if (!q->nr)
417                 return;
418         s->workdir_dirty = 1;
419         for (i = 0; i < q->nr; i++) {
420                 struct diff_filepair *p;
421                 struct string_list_item *it;
422                 struct wt_status_change_data *d;
423
424                 p = q->queue[i];
425                 it = string_list_insert(&s->change, p->one->path);
426                 d = it->util;
427                 if (!d) {
428                         d = xcalloc(1, sizeof(*d));
429                         it->util = d;
430                 }
431                 if (!d->worktree_status)
432                         d->worktree_status = p->status;
433                 d->dirty_submodule = p->two->dirty_submodule;
434                 if (S_ISGITLINK(p->two->mode))
435                         d->new_submodule_commits = !!hashcmp(p->one->sha1, p->two->sha1);
436         }
437 }
438
439 static int unmerged_mask(const char *path)
440 {
441         int pos, mask;
442         const struct cache_entry *ce;
443
444         pos = cache_name_pos(path, strlen(path));
445         if (0 <= pos)
446                 return 0;
447
448         mask = 0;
449         pos = -pos-1;
450         while (pos < active_nr) {
451                 ce = active_cache[pos++];
452                 if (strcmp(ce->name, path) || !ce_stage(ce))
453                         break;
454                 mask |= (1 << (ce_stage(ce) - 1));
455         }
456         return mask;
457 }
458
459 static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
460                                          struct diff_options *options,
461                                          void *data)
462 {
463         struct wt_status *s = data;
464         int i;
465
466         for (i = 0; i < q->nr; i++) {
467                 struct diff_filepair *p;
468                 struct string_list_item *it;
469                 struct wt_status_change_data *d;
470
471                 p = q->queue[i];
472                 it = string_list_insert(&s->change, p->two->path);
473                 d = it->util;
474                 if (!d) {
475                         d = xcalloc(1, sizeof(*d));
476                         it->util = d;
477                 }
478                 if (!d->index_status)
479                         d->index_status = p->status;
480                 switch (p->status) {
481                 case DIFF_STATUS_COPIED:
482                 case DIFF_STATUS_RENAMED:
483                         d->head_path = xstrdup(p->one->path);
484                         break;
485                 case DIFF_STATUS_UNMERGED:
486                         d->stagemask = unmerged_mask(p->two->path);
487                         break;
488                 }
489         }
490 }
491
492 static void wt_status_collect_changes_worktree(struct wt_status *s)
493 {
494         struct rev_info rev;
495
496         init_revisions(&rev, NULL);
497         setup_revisions(0, NULL, &rev, NULL);
498         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
499         DIFF_OPT_SET(&rev.diffopt, DIRTY_SUBMODULES);
500         if (!s->show_untracked_files)
501                 DIFF_OPT_SET(&rev.diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
502         if (s->ignore_submodule_arg) {
503                 DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
504                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
505         }
506         rev.diffopt.format_callback = wt_status_collect_changed_cb;
507         rev.diffopt.format_callback_data = s;
508         copy_pathspec(&rev.prune_data, &s->pathspec);
509         run_diff_files(&rev, 0);
510 }
511
512 static void wt_status_collect_changes_index(struct wt_status *s)
513 {
514         struct rev_info rev;
515         struct setup_revision_opt opt;
516
517         init_revisions(&rev, NULL);
518         memset(&opt, 0, sizeof(opt));
519         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
520         setup_revisions(0, NULL, &rev, &opt);
521
522         DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
523         if (s->ignore_submodule_arg) {
524                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
525         } else {
526                 /*
527                  * Unless the user did explicitly request a submodule ignore
528                  * mode by passing a command line option we do not ignore any
529                  * changed submodule SHA-1s when comparing index and HEAD, no
530                  * matter what is configured. Otherwise the user won't be
531                  * shown any submodules she manually added (and which are
532                  * staged to be committed), which would be really confusing.
533                  */
534                 handle_ignore_submodules_arg(&rev.diffopt, "dirty");
535         }
536
537         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
538         rev.diffopt.format_callback = wt_status_collect_updated_cb;
539         rev.diffopt.format_callback_data = s;
540         rev.diffopt.detect_rename = 1;
541         rev.diffopt.rename_limit = 200;
542         rev.diffopt.break_opt = 0;
543         copy_pathspec(&rev.prune_data, &s->pathspec);
544         run_diff_index(&rev, 1);
545 }
546
547 static void wt_status_collect_changes_initial(struct wt_status *s)
548 {
549         int i;
550
551         for (i = 0; i < active_nr; i++) {
552                 struct string_list_item *it;
553                 struct wt_status_change_data *d;
554                 const struct cache_entry *ce = active_cache[i];
555
556                 if (!ce_path_match(ce, &s->pathspec, NULL))
557                         continue;
558                 it = string_list_insert(&s->change, ce->name);
559                 d = it->util;
560                 if (!d) {
561                         d = xcalloc(1, sizeof(*d));
562                         it->util = d;
563                 }
564                 if (ce_stage(ce)) {
565                         d->index_status = DIFF_STATUS_UNMERGED;
566                         d->stagemask |= (1 << (ce_stage(ce) - 1));
567                 }
568                 else
569                         d->index_status = DIFF_STATUS_ADDED;
570         }
571 }
572
573 static void wt_status_collect_untracked(struct wt_status *s)
574 {
575         int i;
576         struct dir_struct dir;
577         uint64_t t_begin = getnanotime();
578
579         if (!s->show_untracked_files)
580                 return;
581
582         memset(&dir, 0, sizeof(dir));
583         if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
584                 dir.flags |=
585                         DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
586         if (s->show_ignored_files)
587                 dir.flags |= DIR_SHOW_IGNORED_TOO;
588         else
589                 dir.untracked = the_index.untracked;
590         setup_standard_excludes(&dir);
591
592         fill_directory(&dir, &s->pathspec);
593
594         for (i = 0; i < dir.nr; i++) {
595                 struct dir_entry *ent = dir.entries[i];
596                 if (cache_name_is_other(ent->name, ent->len) &&
597                     dir_path_match(ent, &s->pathspec, 0, NULL))
598                         string_list_insert(&s->untracked, ent->name);
599                 free(ent);
600         }
601
602         for (i = 0; i < dir.ignored_nr; i++) {
603                 struct dir_entry *ent = dir.ignored[i];
604                 if (cache_name_is_other(ent->name, ent->len) &&
605                     dir_path_match(ent, &s->pathspec, 0, NULL))
606                         string_list_insert(&s->ignored, ent->name);
607                 free(ent);
608         }
609
610         free(dir.entries);
611         free(dir.ignored);
612         clear_directory(&dir);
613
614         if (advice_status_u_option)
615                 s->untracked_in_ms = (getnanotime() - t_begin) / 1000000;
616 }
617
618 void wt_status_collect(struct wt_status *s)
619 {
620         wt_status_collect_changes_worktree(s);
621
622         if (s->is_initial)
623                 wt_status_collect_changes_initial(s);
624         else
625                 wt_status_collect_changes_index(s);
626         wt_status_collect_untracked(s);
627 }
628
629 static void wt_status_print_unmerged(struct wt_status *s)
630 {
631         int shown_header = 0;
632         int i;
633
634         for (i = 0; i < s->change.nr; i++) {
635                 struct wt_status_change_data *d;
636                 struct string_list_item *it;
637                 it = &(s->change.items[i]);
638                 d = it->util;
639                 if (!d->stagemask)
640                         continue;
641                 if (!shown_header) {
642                         wt_status_print_unmerged_header(s);
643                         shown_header = 1;
644                 }
645                 wt_status_print_unmerged_data(s, it);
646         }
647         if (shown_header)
648                 wt_status_print_trailer(s);
649
650 }
651
652 static void wt_status_print_updated(struct wt_status *s)
653 {
654         int shown_header = 0;
655         int i;
656
657         for (i = 0; i < s->change.nr; i++) {
658                 struct wt_status_change_data *d;
659                 struct string_list_item *it;
660                 it = &(s->change.items[i]);
661                 d = it->util;
662                 if (!d->index_status ||
663                     d->index_status == DIFF_STATUS_UNMERGED)
664                         continue;
665                 if (!shown_header) {
666                         wt_status_print_cached_header(s);
667                         s->commitable = 1;
668                         shown_header = 1;
669                 }
670                 wt_status_print_change_data(s, WT_STATUS_UPDATED, it);
671         }
672         if (shown_header)
673                 wt_status_print_trailer(s);
674 }
675
676 /*
677  * -1 : has delete
678  *  0 : no change
679  *  1 : some change but no delete
680  */
681 static int wt_status_check_worktree_changes(struct wt_status *s,
682                                              int *dirty_submodules)
683 {
684         int i;
685         int changes = 0;
686
687         *dirty_submodules = 0;
688
689         for (i = 0; i < s->change.nr; i++) {
690                 struct wt_status_change_data *d;
691                 d = s->change.items[i].util;
692                 if (!d->worktree_status ||
693                     d->worktree_status == DIFF_STATUS_UNMERGED)
694                         continue;
695                 if (!changes)
696                         changes = 1;
697                 if (d->dirty_submodule)
698                         *dirty_submodules = 1;
699                 if (d->worktree_status == DIFF_STATUS_DELETED)
700                         changes = -1;
701         }
702         return changes;
703 }
704
705 static void wt_status_print_changed(struct wt_status *s)
706 {
707         int i, dirty_submodules;
708         int worktree_changes = wt_status_check_worktree_changes(s, &dirty_submodules);
709
710         if (!worktree_changes)
711                 return;
712
713         wt_status_print_dirty_header(s, worktree_changes < 0, dirty_submodules);
714
715         for (i = 0; i < s->change.nr; i++) {
716                 struct wt_status_change_data *d;
717                 struct string_list_item *it;
718                 it = &(s->change.items[i]);
719                 d = it->util;
720                 if (!d->worktree_status ||
721                     d->worktree_status == DIFF_STATUS_UNMERGED)
722                         continue;
723                 wt_status_print_change_data(s, WT_STATUS_CHANGED, it);
724         }
725         wt_status_print_trailer(s);
726 }
727
728 static void wt_status_print_submodule_summary(struct wt_status *s, int uncommitted)
729 {
730         struct child_process sm_summary = CHILD_PROCESS_INIT;
731         struct strbuf cmd_stdout = STRBUF_INIT;
732         struct strbuf summary = STRBUF_INIT;
733         char *summary_content;
734
735         argv_array_pushf(&sm_summary.env_array, "GIT_INDEX_FILE=%s",
736                          s->index_file);
737
738         argv_array_push(&sm_summary.args, "submodule");
739         argv_array_push(&sm_summary.args, "summary");
740         argv_array_push(&sm_summary.args, uncommitted ? "--files" : "--cached");
741         argv_array_push(&sm_summary.args, "--for-status");
742         argv_array_push(&sm_summary.args, "--summary-limit");
743         argv_array_pushf(&sm_summary.args, "%d", s->submodule_summary);
744         if (!uncommitted)
745                 argv_array_push(&sm_summary.args, s->amend ? "HEAD^" : "HEAD");
746
747         sm_summary.git_cmd = 1;
748         sm_summary.no_stdin = 1;
749
750         capture_command(&sm_summary, &cmd_stdout, 1024);
751
752         /* prepend header, only if there's an actual output */
753         if (cmd_stdout.len) {
754                 if (uncommitted)
755                         strbuf_addstr(&summary, _("Submodules changed but not updated:"));
756                 else
757                         strbuf_addstr(&summary, _("Submodule changes to be committed:"));
758                 strbuf_addstr(&summary, "\n\n");
759         }
760         strbuf_addbuf(&summary, &cmd_stdout);
761         strbuf_release(&cmd_stdout);
762
763         if (s->display_comment_prefix) {
764                 size_t len;
765                 summary_content = strbuf_detach(&summary, &len);
766                 strbuf_add_commented_lines(&summary, summary_content, len);
767                 free(summary_content);
768         }
769
770         fputs(summary.buf, s->fp);
771         strbuf_release(&summary);
772 }
773
774 static void wt_status_print_other(struct wt_status *s,
775                                   struct string_list *l,
776                                   const char *what,
777                                   const char *how)
778 {
779         int i;
780         struct strbuf buf = STRBUF_INIT;
781         static struct string_list output = STRING_LIST_INIT_DUP;
782         struct column_options copts;
783
784         if (!l->nr)
785                 return;
786
787         wt_status_print_other_header(s, what, how);
788
789         for (i = 0; i < l->nr; i++) {
790                 struct string_list_item *it;
791                 const char *path;
792                 it = &(l->items[i]);
793                 path = quote_path(it->string, s->prefix, &buf);
794                 if (column_active(s->colopts)) {
795                         string_list_append(&output, path);
796                         continue;
797                 }
798                 status_printf(s, color(WT_STATUS_HEADER, s), "\t");
799                 status_printf_more(s, color(WT_STATUS_UNTRACKED, s),
800                                    "%s\n", path);
801         }
802
803         strbuf_release(&buf);
804         if (!column_active(s->colopts))
805                 goto conclude;
806
807         strbuf_addf(&buf, "%s%s\t%s",
808                     color(WT_STATUS_HEADER, s),
809                     s->display_comment_prefix ? "#" : "",
810                     color(WT_STATUS_UNTRACKED, s));
811         memset(&copts, 0, sizeof(copts));
812         copts.padding = 1;
813         copts.indent = buf.buf;
814         if (want_color(s->use_color))
815                 copts.nl = GIT_COLOR_RESET "\n";
816         print_columns(&output, s->colopts, &copts);
817         string_list_clear(&output, 0);
818         strbuf_release(&buf);
819 conclude:
820         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
821 }
822
823 void wt_status_truncate_message_at_cut_line(struct strbuf *buf)
824 {
825         const char *p;
826         struct strbuf pattern = STRBUF_INIT;
827
828         strbuf_addf(&pattern, "\n%c %s", comment_line_char, cut_line);
829         if (starts_with(buf->buf, pattern.buf + 1))
830                 strbuf_setlen(buf, 0);
831         else if ((p = strstr(buf->buf, pattern.buf)))
832                 strbuf_setlen(buf, p - buf->buf + 1);
833         strbuf_release(&pattern);
834 }
835
836 void wt_status_add_cut_line(FILE *fp)
837 {
838         const char *explanation = _("Do not touch the line above.\nEverything below will be removed.");
839         struct strbuf buf = STRBUF_INIT;
840
841         fprintf(fp, "%c %s", comment_line_char, cut_line);
842         strbuf_add_commented_lines(&buf, explanation, strlen(explanation));
843         fputs(buf.buf, fp);
844         strbuf_release(&buf);
845 }
846
847 static void wt_status_print_verbose(struct wt_status *s)
848 {
849         struct rev_info rev;
850         struct setup_revision_opt opt;
851         int dirty_submodules;
852         const char *c = color(WT_STATUS_HEADER, s);
853
854         init_revisions(&rev, NULL);
855         DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
856
857         memset(&opt, 0, sizeof(opt));
858         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
859         setup_revisions(0, NULL, &rev, &opt);
860
861         rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
862         rev.diffopt.detect_rename = 1;
863         rev.diffopt.file = s->fp;
864         rev.diffopt.close_file = 0;
865         /*
866          * If we're not going to stdout, then we definitely don't
867          * want color, since we are going to the commit message
868          * file (and even the "auto" setting won't work, since it
869          * will have checked isatty on stdout). But we then do want
870          * to insert the scissor line here to reliably remove the
871          * diff before committing.
872          */
873         if (s->fp != stdout) {
874                 rev.diffopt.use_color = 0;
875                 wt_status_add_cut_line(s->fp);
876         }
877         if (s->verbose > 1 && s->commitable) {
878                 /* print_updated() printed a header, so do we */
879                 if (s->fp != stdout)
880                         wt_status_print_trailer(s);
881                 status_printf_ln(s, c, _("Changes to be committed:"));
882                 rev.diffopt.a_prefix = "c/";
883                 rev.diffopt.b_prefix = "i/";
884         } /* else use prefix as per user config */
885         run_diff_index(&rev, 1);
886         if (s->verbose > 1 &&
887             wt_status_check_worktree_changes(s, &dirty_submodules)) {
888                 status_printf_ln(s, c,
889                         "--------------------------------------------------");
890                 status_printf_ln(s, c, _("Changes not staged for commit:"));
891                 setup_work_tree();
892                 rev.diffopt.a_prefix = "i/";
893                 rev.diffopt.b_prefix = "w/";
894                 run_diff_files(&rev, 0);
895         }
896 }
897
898 static void wt_status_print_tracking(struct wt_status *s)
899 {
900         struct strbuf sb = STRBUF_INIT;
901         const char *cp, *ep, *branch_name;
902         struct branch *branch;
903         char comment_line_string[3];
904         int i;
905
906         assert(s->branch && !s->is_initial);
907         if (!skip_prefix(s->branch, "refs/heads/", &branch_name))
908                 return;
909         branch = branch_get(branch_name);
910         if (!format_tracking_info(branch, &sb))
911                 return;
912
913         i = 0;
914         if (s->display_comment_prefix) {
915                 comment_line_string[i++] = comment_line_char;
916                 comment_line_string[i++] = ' ';
917         }
918         comment_line_string[i] = '\0';
919
920         for (cp = sb.buf; (ep = strchr(cp, '\n')) != NULL; cp = ep + 1)
921                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s),
922                                  "%s%.*s", comment_line_string,
923                                  (int)(ep - cp), cp);
924         if (s->display_comment_prefix)
925                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "%c",
926                                  comment_line_char);
927         else
928                 fputs("", s->fp);
929 }
930
931 static int has_unmerged(struct wt_status *s)
932 {
933         int i;
934
935         for (i = 0; i < s->change.nr; i++) {
936                 struct wt_status_change_data *d;
937                 d = s->change.items[i].util;
938                 if (d->stagemask)
939                         return 1;
940         }
941         return 0;
942 }
943
944 static void show_merge_in_progress(struct wt_status *s,
945                                 struct wt_status_state *state,
946                                 const char *color)
947 {
948         if (has_unmerged(s)) {
949                 status_printf_ln(s, color, _("You have unmerged paths."));
950                 if (s->hints)
951                         status_printf_ln(s, color,
952                                 _("  (fix conflicts and run \"git commit\")"));
953         } else {
954                 s-> commitable = 1;
955                 status_printf_ln(s, color,
956                         _("All conflicts fixed but you are still merging."));
957                 if (s->hints)
958                         status_printf_ln(s, color,
959                                 _("  (use \"git commit\" to conclude merge)"));
960         }
961         wt_status_print_trailer(s);
962 }
963
964 static void show_am_in_progress(struct wt_status *s,
965                                 struct wt_status_state *state,
966                                 const char *color)
967 {
968         status_printf_ln(s, color,
969                 _("You are in the middle of an am session."));
970         if (state->am_empty_patch)
971                 status_printf_ln(s, color,
972                         _("The current patch is empty."));
973         if (s->hints) {
974                 if (!state->am_empty_patch)
975                         status_printf_ln(s, color,
976                                 _("  (fix conflicts and then run \"git am --continue\")"));
977                 status_printf_ln(s, color,
978                         _("  (use \"git am --skip\" to skip this patch)"));
979                 status_printf_ln(s, color,
980                         _("  (use \"git am --abort\" to restore the original branch)"));
981         }
982         wt_status_print_trailer(s);
983 }
984
985 static char *read_line_from_git_path(const char *filename)
986 {
987         struct strbuf buf = STRBUF_INIT;
988         FILE *fp = fopen(git_path("%s", filename), "r");
989         if (!fp) {
990                 strbuf_release(&buf);
991                 return NULL;
992         }
993         strbuf_getline_lf(&buf, fp);
994         if (!fclose(fp)) {
995                 return strbuf_detach(&buf, NULL);
996         } else {
997                 strbuf_release(&buf);
998                 return NULL;
999         }
1000 }
1001
1002 static int split_commit_in_progress(struct wt_status *s)
1003 {
1004         int split_in_progress = 0;
1005         char *head = read_line_from_git_path("HEAD");
1006         char *orig_head = read_line_from_git_path("ORIG_HEAD");
1007         char *rebase_amend = read_line_from_git_path("rebase-merge/amend");
1008         char *rebase_orig_head = read_line_from_git_path("rebase-merge/orig-head");
1009
1010         if (!head || !orig_head || !rebase_amend || !rebase_orig_head ||
1011             !s->branch || strcmp(s->branch, "HEAD"))
1012                 return split_in_progress;
1013
1014         if (!strcmp(rebase_amend, rebase_orig_head)) {
1015                 if (strcmp(head, rebase_amend))
1016                         split_in_progress = 1;
1017         } else if (strcmp(orig_head, rebase_orig_head)) {
1018                 split_in_progress = 1;
1019         }
1020
1021         if (!s->amend && !s->nowarn && !s->workdir_dirty)
1022                 split_in_progress = 0;
1023
1024         free(head);
1025         free(orig_head);
1026         free(rebase_amend);
1027         free(rebase_orig_head);
1028         return split_in_progress;
1029 }
1030
1031 /*
1032  * Turn
1033  * "pick d6a2f0303e897ec257dd0e0a39a5ccb709bc2047 some message"
1034  * into
1035  * "pick d6a2f03 some message"
1036  *
1037  * The function assumes that the line does not contain useless spaces
1038  * before or after the command.
1039  */
1040 static void abbrev_sha1_in_line(struct strbuf *line)
1041 {
1042         struct strbuf **split;
1043         int i;
1044
1045         if (starts_with(line->buf, "exec ") ||
1046             starts_with(line->buf, "x "))
1047                 return;
1048
1049         split = strbuf_split_max(line, ' ', 3);
1050         if (split[0] && split[1]) {
1051                 unsigned char sha1[20];
1052                 const char *abbrev;
1053
1054                 /*
1055                  * strbuf_split_max left a space. Trim it and re-add
1056                  * it after abbreviation.
1057                  */
1058                 strbuf_trim(split[1]);
1059                 if (!get_sha1(split[1]->buf, sha1)) {
1060                         abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
1061                         strbuf_reset(split[1]);
1062                         strbuf_addf(split[1], "%s ", abbrev);
1063                         strbuf_reset(line);
1064                         for (i = 0; split[i]; i++)
1065                                 strbuf_addf(line, "%s", split[i]->buf);
1066                 }
1067         }
1068         strbuf_list_free(split);
1069 }
1070
1071 static void read_rebase_todolist(const char *fname, struct string_list *lines)
1072 {
1073         struct strbuf line = STRBUF_INIT;
1074         FILE *f = fopen(git_path("%s", fname), "r");
1075
1076         if (!f)
1077                 die_errno("Could not open file %s for reading",
1078                           git_path("%s", fname));
1079         while (!strbuf_getline_lf(&line, f)) {
1080                 if (line.len && line.buf[0] == comment_line_char)
1081                         continue;
1082                 strbuf_trim(&line);
1083                 if (!line.len)
1084                         continue;
1085                 abbrev_sha1_in_line(&line);
1086                 string_list_append(lines, line.buf);
1087         }
1088 }
1089
1090 static void show_rebase_information(struct wt_status *s,
1091                                         struct wt_status_state *state,
1092                                         const char *color)
1093 {
1094         if (state->rebase_interactive_in_progress) {
1095                 int i;
1096                 int nr_lines_to_show = 2;
1097
1098                 struct string_list have_done = STRING_LIST_INIT_DUP;
1099                 struct string_list yet_to_do = STRING_LIST_INIT_DUP;
1100
1101                 read_rebase_todolist("rebase-merge/done", &have_done);
1102                 read_rebase_todolist("rebase-merge/git-rebase-todo", &yet_to_do);
1103
1104                 if (have_done.nr == 0)
1105                         status_printf_ln(s, color, _("No commands done."));
1106                 else {
1107                         status_printf_ln(s, color,
1108                                 Q_("Last command done (%d command done):",
1109                                         "Last commands done (%d commands done):",
1110                                         have_done.nr),
1111                                 have_done.nr);
1112                         for (i = (have_done.nr > nr_lines_to_show)
1113                                 ? have_done.nr - nr_lines_to_show : 0;
1114                                 i < have_done.nr;
1115                                 i++)
1116                                 status_printf_ln(s, color, "   %s", have_done.items[i].string);
1117                         if (have_done.nr > nr_lines_to_show && s->hints)
1118                                 status_printf_ln(s, color,
1119                                         _("  (see more in file %s)"), git_path("rebase-merge/done"));
1120                 }
1121
1122                 if (yet_to_do.nr == 0)
1123                         status_printf_ln(s, color,
1124                                          _("No commands remaining."));
1125                 else {
1126                         status_printf_ln(s, color,
1127                                 Q_("Next command to do (%d remaining command):",
1128                                         "Next commands to do (%d remaining commands):",
1129                                         yet_to_do.nr),
1130                                 yet_to_do.nr);
1131                         for (i = 0; i < nr_lines_to_show && i < yet_to_do.nr; i++)
1132                                 status_printf_ln(s, color, "   %s", yet_to_do.items[i].string);
1133                         if (s->hints)
1134                                 status_printf_ln(s, color,
1135                                         _("  (use \"git rebase --edit-todo\" to view and edit)"));
1136                 }
1137                 string_list_clear(&yet_to_do, 0);
1138                 string_list_clear(&have_done, 0);
1139         }
1140 }
1141
1142 static void print_rebase_state(struct wt_status *s,
1143                                 struct wt_status_state *state,
1144                                 const char *color)
1145 {
1146         if (state->branch)
1147                 status_printf_ln(s, color,
1148                                  _("You are currently rebasing branch '%s' on '%s'."),
1149                                  state->branch,
1150                                  state->onto);
1151         else
1152                 status_printf_ln(s, color,
1153                                  _("You are currently rebasing."));
1154 }
1155
1156 static void show_rebase_in_progress(struct wt_status *s,
1157                                 struct wt_status_state *state,
1158                                 const char *color)
1159 {
1160         struct stat st;
1161
1162         show_rebase_information(s, state, color);
1163         if (has_unmerged(s)) {
1164                 print_rebase_state(s, state, color);
1165                 if (s->hints) {
1166                         status_printf_ln(s, color,
1167                                 _("  (fix conflicts and then run \"git rebase --continue\")"));
1168                         status_printf_ln(s, color,
1169                                 _("  (use \"git rebase --skip\" to skip this patch)"));
1170                         status_printf_ln(s, color,
1171                                 _("  (use \"git rebase --abort\" to check out the original branch)"));
1172                 }
1173         } else if (state->rebase_in_progress || !stat(git_path_merge_msg(), &st)) {
1174                 print_rebase_state(s, state, color);
1175                 if (s->hints)
1176                         status_printf_ln(s, color,
1177                                 _("  (all conflicts fixed: run \"git rebase --continue\")"));
1178         } else if (split_commit_in_progress(s)) {
1179                 if (state->branch)
1180                         status_printf_ln(s, color,
1181                                          _("You are currently splitting a commit while rebasing branch '%s' on '%s'."),
1182                                          state->branch,
1183                                          state->onto);
1184                 else
1185                         status_printf_ln(s, color,
1186                                          _("You are currently splitting a commit during a rebase."));
1187                 if (s->hints)
1188                         status_printf_ln(s, color,
1189                                 _("  (Once your working directory is clean, run \"git rebase --continue\")"));
1190         } else {
1191                 if (state->branch)
1192                         status_printf_ln(s, color,
1193                                          _("You are currently editing a commit while rebasing branch '%s' on '%s'."),
1194                                          state->branch,
1195                                          state->onto);
1196                 else
1197                         status_printf_ln(s, color,
1198                                          _("You are currently editing a commit during a rebase."));
1199                 if (s->hints && !s->amend) {
1200                         status_printf_ln(s, color,
1201                                 _("  (use \"git commit --amend\" to amend the current commit)"));
1202                         status_printf_ln(s, color,
1203                                 _("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
1204                 }
1205         }
1206         wt_status_print_trailer(s);
1207 }
1208
1209 static void show_cherry_pick_in_progress(struct wt_status *s,
1210                                         struct wt_status_state *state,
1211                                         const char *color)
1212 {
1213         status_printf_ln(s, color, _("You are currently cherry-picking commit %s."),
1214                         find_unique_abbrev(state->cherry_pick_head_sha1, DEFAULT_ABBREV));
1215         if (s->hints) {
1216                 if (has_unmerged(s))
1217                         status_printf_ln(s, color,
1218                                 _("  (fix conflicts and run \"git cherry-pick --continue\")"));
1219                 else
1220                         status_printf_ln(s, color,
1221                                 _("  (all conflicts fixed: run \"git cherry-pick --continue\")"));
1222                 status_printf_ln(s, color,
1223                         _("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
1224         }
1225         wt_status_print_trailer(s);
1226 }
1227
1228 static void show_revert_in_progress(struct wt_status *s,
1229                                         struct wt_status_state *state,
1230                                         const char *color)
1231 {
1232         status_printf_ln(s, color, _("You are currently reverting commit %s."),
1233                          find_unique_abbrev(state->revert_head_sha1, DEFAULT_ABBREV));
1234         if (s->hints) {
1235                 if (has_unmerged(s))
1236                         status_printf_ln(s, color,
1237                                 _("  (fix conflicts and run \"git revert --continue\")"));
1238                 else
1239                         status_printf_ln(s, color,
1240                                 _("  (all conflicts fixed: run \"git revert --continue\")"));
1241                 status_printf_ln(s, color,
1242                         _("  (use \"git revert --abort\" to cancel the revert operation)"));
1243         }
1244         wt_status_print_trailer(s);
1245 }
1246
1247 static void show_bisect_in_progress(struct wt_status *s,
1248                                 struct wt_status_state *state,
1249                                 const char *color)
1250 {
1251         if (state->branch)
1252                 status_printf_ln(s, color,
1253                                  _("You are currently bisecting, started from branch '%s'."),
1254                                  state->branch);
1255         else
1256                 status_printf_ln(s, color,
1257                                  _("You are currently bisecting."));
1258         if (s->hints)
1259                 status_printf_ln(s, color,
1260                         _("  (use \"git bisect reset\" to get back to the original branch)"));
1261         wt_status_print_trailer(s);
1262 }
1263
1264 /*
1265  * Extract branch information from rebase/bisect
1266  */
1267 static char *get_branch(const struct worktree *wt, const char *path)
1268 {
1269         struct strbuf sb = STRBUF_INIT;
1270         unsigned char sha1[20];
1271         const char *branch_name;
1272
1273         if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
1274                 goto got_nothing;
1275
1276         while (sb.len && sb.buf[sb.len - 1] == '\n')
1277                 strbuf_setlen(&sb, sb.len - 1);
1278         if (!sb.len)
1279                 goto got_nothing;
1280         if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
1281                 strbuf_remove(&sb, 0, branch_name - sb.buf);
1282         else if (starts_with(sb.buf, "refs/"))
1283                 ;
1284         else if (!get_sha1_hex(sb.buf, sha1)) {
1285                 const char *abbrev;
1286                 abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
1287                 strbuf_reset(&sb);
1288                 strbuf_addstr(&sb, abbrev);
1289         } else if (!strcmp(sb.buf, "detached HEAD")) /* rebase */
1290                 goto got_nothing;
1291         else                    /* bisect */
1292                 ;
1293         return strbuf_detach(&sb, NULL);
1294
1295 got_nothing:
1296         strbuf_release(&sb);
1297         return NULL;
1298 }
1299
1300 struct grab_1st_switch_cbdata {
1301         struct strbuf buf;
1302         unsigned char nsha1[20];
1303 };
1304
1305 static int grab_1st_switch(unsigned char *osha1, unsigned char *nsha1,
1306                            const char *email, unsigned long timestamp, int tz,
1307                            const char *message, void *cb_data)
1308 {
1309         struct grab_1st_switch_cbdata *cb = cb_data;
1310         const char *target = NULL, *end;
1311
1312         if (!skip_prefix(message, "checkout: moving from ", &message))
1313                 return 0;
1314         target = strstr(message, " to ");
1315         if (!target)
1316                 return 0;
1317         target += strlen(" to ");
1318         strbuf_reset(&cb->buf);
1319         hashcpy(cb->nsha1, nsha1);
1320         end = strchrnul(target, '\n');
1321         strbuf_add(&cb->buf, target, end - target);
1322         if (!strcmp(cb->buf.buf, "HEAD")) {
1323                 /* HEAD is relative. Resolve it to the right reflog entry. */
1324                 strbuf_reset(&cb->buf);
1325                 strbuf_addstr(&cb->buf,
1326                               find_unique_abbrev(nsha1, DEFAULT_ABBREV));
1327         }
1328         return 1;
1329 }
1330
1331 static void wt_status_get_detached_from(struct wt_status_state *state)
1332 {
1333         struct grab_1st_switch_cbdata cb;
1334         struct commit *commit;
1335         unsigned char sha1[20];
1336         char *ref = NULL;
1337
1338         strbuf_init(&cb.buf, 0);
1339         if (for_each_reflog_ent_reverse("HEAD", grab_1st_switch, &cb) <= 0) {
1340                 strbuf_release(&cb.buf);
1341                 return;
1342         }
1343
1344         if (dwim_ref(cb.buf.buf, cb.buf.len, sha1, &ref) == 1 &&
1345             /* sha1 is a commit? match without further lookup */
1346             (!hashcmp(cb.nsha1, sha1) ||
1347              /* perhaps sha1 is a tag, try to dereference to a commit */
1348              ((commit = lookup_commit_reference_gently(sha1, 1)) != NULL &&
1349               !hashcmp(cb.nsha1, commit->object.oid.hash)))) {
1350                 const char *from = ref;
1351                 if (!skip_prefix(from, "refs/tags/", &from))
1352                         skip_prefix(from, "refs/remotes/", &from);
1353                 state->detached_from = xstrdup(from);
1354         } else
1355                 state->detached_from =
1356                         xstrdup(find_unique_abbrev(cb.nsha1, DEFAULT_ABBREV));
1357         hashcpy(state->detached_sha1, cb.nsha1);
1358         state->detached_at = !get_sha1("HEAD", sha1) &&
1359                              !hashcmp(sha1, state->detached_sha1);
1360
1361         free(ref);
1362         strbuf_release(&cb.buf);
1363 }
1364
1365 int wt_status_check_rebase(const struct worktree *wt,
1366                            struct wt_status_state *state)
1367 {
1368         struct stat st;
1369
1370         if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
1371                 if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
1372                         state->am_in_progress = 1;
1373                         if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
1374                                 state->am_empty_patch = 1;
1375                 } else {
1376                         state->rebase_in_progress = 1;
1377                         state->branch = get_branch(wt, "rebase-apply/head-name");
1378                         state->onto = get_branch(wt, "rebase-apply/onto");
1379                 }
1380         } else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
1381                 if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
1382                         state->rebase_interactive_in_progress = 1;
1383                 else
1384                         state->rebase_in_progress = 1;
1385                 state->branch = get_branch(wt, "rebase-merge/head-name");
1386                 state->onto = get_branch(wt, "rebase-merge/onto");
1387         } else
1388                 return 0;
1389         return 1;
1390 }
1391
1392 int wt_status_check_bisect(const struct worktree *wt,
1393                            struct wt_status_state *state)
1394 {
1395         struct stat st;
1396
1397         if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
1398                 state->bisect_in_progress = 1;
1399                 state->branch = get_branch(wt, "BISECT_START");
1400                 return 1;
1401         }
1402         return 0;
1403 }
1404
1405 void wt_status_get_state(struct wt_status_state *state,
1406                          int get_detached_from)
1407 {
1408         struct stat st;
1409         unsigned char sha1[20];
1410
1411         if (!stat(git_path_merge_head(), &st)) {
1412                 state->merge_in_progress = 1;
1413         } else if (wt_status_check_rebase(NULL, state)) {
1414                 ;               /* all set */
1415         } else if (!stat(git_path_cherry_pick_head(), &st) &&
1416                         !get_sha1("CHERRY_PICK_HEAD", sha1)) {
1417                 state->cherry_pick_in_progress = 1;
1418                 hashcpy(state->cherry_pick_head_sha1, sha1);
1419         }
1420         wt_status_check_bisect(NULL, state);
1421         if (!stat(git_path_revert_head(), &st) &&
1422             !get_sha1("REVERT_HEAD", sha1)) {
1423                 state->revert_in_progress = 1;
1424                 hashcpy(state->revert_head_sha1, sha1);
1425         }
1426
1427         if (get_detached_from)
1428                 wt_status_get_detached_from(state);
1429 }
1430
1431 static void wt_status_print_state(struct wt_status *s,
1432                                   struct wt_status_state *state)
1433 {
1434         const char *state_color = color(WT_STATUS_HEADER, s);
1435         if (state->merge_in_progress)
1436                 show_merge_in_progress(s, state, state_color);
1437         else if (state->am_in_progress)
1438                 show_am_in_progress(s, state, state_color);
1439         else if (state->rebase_in_progress || state->rebase_interactive_in_progress)
1440                 show_rebase_in_progress(s, state, state_color);
1441         else if (state->cherry_pick_in_progress)
1442                 show_cherry_pick_in_progress(s, state, state_color);
1443         else if (state->revert_in_progress)
1444                 show_revert_in_progress(s, state, state_color);
1445         if (state->bisect_in_progress)
1446                 show_bisect_in_progress(s, state, state_color);
1447 }
1448
1449 void wt_status_print(struct wt_status *s)
1450 {
1451         const char *branch_color = color(WT_STATUS_ONBRANCH, s);
1452         const char *branch_status_color = color(WT_STATUS_HEADER, s);
1453         struct wt_status_state state;
1454
1455         memset(&state, 0, sizeof(state));
1456         wt_status_get_state(&state,
1457                             s->branch && !strcmp(s->branch, "HEAD"));
1458
1459         if (s->branch) {
1460                 const char *on_what = _("On branch ");
1461                 const char *branch_name = s->branch;
1462                 if (!strcmp(branch_name, "HEAD")) {
1463                         branch_status_color = color(WT_STATUS_NOBRANCH, s);
1464                         if (state.rebase_in_progress || state.rebase_interactive_in_progress) {
1465                                 if (state.rebase_interactive_in_progress)
1466                                         on_what = _("interactive rebase in progress; onto ");
1467                                 else
1468                                         on_what = _("rebase in progress; onto ");
1469                                 branch_name = state.onto;
1470                         } else if (state.detached_from) {
1471                                 branch_name = state.detached_from;
1472                                 if (state.detached_at)
1473                                         on_what = _("HEAD detached at ");
1474                                 else
1475                                         on_what = _("HEAD detached from ");
1476                         } else {
1477                                 branch_name = "";
1478                                 on_what = _("Not currently on any branch.");
1479                         }
1480                 } else
1481                         skip_prefix(branch_name, "refs/heads/", &branch_name);
1482                 status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
1483                 status_printf_more(s, branch_status_color, "%s", on_what);
1484                 status_printf_more(s, branch_color, "%s\n", branch_name);
1485                 if (!s->is_initial)
1486                         wt_status_print_tracking(s);
1487         }
1488
1489         wt_status_print_state(s, &state);
1490         free(state.branch);
1491         free(state.onto);
1492         free(state.detached_from);
1493
1494         if (s->is_initial) {
1495                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1496                 status_printf_ln(s, color(WT_STATUS_HEADER, s), _("Initial commit"));
1497                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1498         }
1499
1500         wt_status_print_updated(s);
1501         wt_status_print_unmerged(s);
1502         wt_status_print_changed(s);
1503         if (s->submodule_summary &&
1504             (!s->ignore_submodule_arg ||
1505              strcmp(s->ignore_submodule_arg, "all"))) {
1506                 wt_status_print_submodule_summary(s, 0);  /* staged */
1507                 wt_status_print_submodule_summary(s, 1);  /* unstaged */
1508         }
1509         if (s->show_untracked_files) {
1510                 wt_status_print_other(s, &s->untracked, _("Untracked files"), "add");
1511                 if (s->show_ignored_files)
1512                         wt_status_print_other(s, &s->ignored, _("Ignored files"), "add -f");
1513                 if (advice_status_u_option && 2000 < s->untracked_in_ms) {
1514                         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
1515                         status_printf_ln(s, GIT_COLOR_NORMAL,
1516                                          _("It took %.2f seconds to enumerate untracked files. 'status -uno'\n"
1517                                            "may speed it up, but you have to be careful not to forget to add\n"
1518                                            "new files yourself (see 'git help status')."),
1519                                          s->untracked_in_ms / 1000.0);
1520                 }
1521         } else if (s->commitable)
1522                 status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
1523                         s->hints
1524                         ? _(" (use -u option to show untracked files)") : "");
1525
1526         if (s->verbose)
1527                 wt_status_print_verbose(s);
1528         if (!s->commitable) {
1529                 if (s->amend)
1530                         status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
1531                 else if (s->nowarn)
1532                         ; /* nothing */
1533                 else if (s->workdir_dirty) {
1534                         if (s->hints)
1535                                 printf(_("no changes added to commit "
1536                                          "(use \"git add\" and/or \"git commit -a\")\n"));
1537                         else
1538                                 printf(_("no changes added to commit\n"));
1539                 } else if (s->untracked.nr) {
1540                         if (s->hints)
1541                                 printf(_("nothing added to commit but untracked files "
1542                                          "present (use \"git add\" to track)\n"));
1543                         else
1544                                 printf(_("nothing added to commit but untracked files present\n"));
1545                 } else if (s->is_initial) {
1546                         if (s->hints)
1547                                 printf(_("nothing to commit (create/copy files "
1548                                          "and use \"git add\" to track)\n"));
1549                         else
1550                                 printf(_("nothing to commit\n"));
1551                 } else if (!s->show_untracked_files) {
1552                         if (s->hints)
1553                                 printf(_("nothing to commit (use -u to show untracked files)\n"));
1554                         else
1555                                 printf(_("nothing to commit\n"));
1556                 } else
1557                         printf(_("nothing to commit, working tree clean\n"));
1558         }
1559 }
1560
1561 static void wt_shortstatus_unmerged(struct string_list_item *it,
1562                            struct wt_status *s)
1563 {
1564         struct wt_status_change_data *d = it->util;
1565         const char *how = "??";
1566
1567         switch (d->stagemask) {
1568         case 1: how = "DD"; break; /* both deleted */
1569         case 2: how = "AU"; break; /* added by us */
1570         case 3: how = "UD"; break; /* deleted by them */
1571         case 4: how = "UA"; break; /* added by them */
1572         case 5: how = "DU"; break; /* deleted by us */
1573         case 6: how = "AA"; break; /* both added */
1574         case 7: how = "UU"; break; /* both modified */
1575         }
1576         color_fprintf(s->fp, color(WT_STATUS_UNMERGED, s), "%s", how);
1577         if (s->null_termination) {
1578                 fprintf(stdout, " %s%c", it->string, 0);
1579         } else {
1580                 struct strbuf onebuf = STRBUF_INIT;
1581                 const char *one;
1582                 one = quote_path(it->string, s->prefix, &onebuf);
1583                 printf(" %s\n", one);
1584                 strbuf_release(&onebuf);
1585         }
1586 }
1587
1588 static void wt_shortstatus_status(struct string_list_item *it,
1589                          struct wt_status *s)
1590 {
1591         struct wt_status_change_data *d = it->util;
1592
1593         if (d->index_status)
1594                 color_fprintf(s->fp, color(WT_STATUS_UPDATED, s), "%c", d->index_status);
1595         else
1596                 putchar(' ');
1597         if (d->worktree_status)
1598                 color_fprintf(s->fp, color(WT_STATUS_CHANGED, s), "%c", d->worktree_status);
1599         else
1600                 putchar(' ');
1601         putchar(' ');
1602         if (s->null_termination) {
1603                 fprintf(stdout, "%s%c", it->string, 0);
1604                 if (d->head_path)
1605                         fprintf(stdout, "%s%c", d->head_path, 0);
1606         } else {
1607                 struct strbuf onebuf = STRBUF_INIT;
1608                 const char *one;
1609                 if (d->head_path) {
1610                         one = quote_path(d->head_path, s->prefix, &onebuf);
1611                         if (*one != '"' && strchr(one, ' ') != NULL) {
1612                                 putchar('"');
1613                                 strbuf_addch(&onebuf, '"');
1614                                 one = onebuf.buf;
1615                         }
1616                         printf("%s -> ", one);
1617                         strbuf_release(&onebuf);
1618                 }
1619                 one = quote_path(it->string, s->prefix, &onebuf);
1620                 if (*one != '"' && strchr(one, ' ') != NULL) {
1621                         putchar('"');
1622                         strbuf_addch(&onebuf, '"');
1623                         one = onebuf.buf;
1624                 }
1625                 printf("%s\n", one);
1626                 strbuf_release(&onebuf);
1627         }
1628 }
1629
1630 static void wt_shortstatus_other(struct string_list_item *it,
1631                                  struct wt_status *s, const char *sign)
1632 {
1633         if (s->null_termination) {
1634                 fprintf(stdout, "%s %s%c", sign, it->string, 0);
1635         } else {
1636                 struct strbuf onebuf = STRBUF_INIT;
1637                 const char *one;
1638                 one = quote_path(it->string, s->prefix, &onebuf);
1639                 color_fprintf(s->fp, color(WT_STATUS_UNTRACKED, s), "%s", sign);
1640                 printf(" %s\n", one);
1641                 strbuf_release(&onebuf);
1642         }
1643 }
1644
1645 static void wt_shortstatus_print_tracking(struct wt_status *s)
1646 {
1647         struct branch *branch;
1648         const char *header_color = color(WT_STATUS_HEADER, s);
1649         const char *branch_color_local = color(WT_STATUS_LOCAL_BRANCH, s);
1650         const char *branch_color_remote = color(WT_STATUS_REMOTE_BRANCH, s);
1651
1652         const char *base;
1653         const char *branch_name;
1654         int num_ours, num_theirs;
1655         int upstream_is_gone = 0;
1656
1657         color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "## ");
1658
1659         if (!s->branch)
1660                 return;
1661         branch_name = s->branch;
1662
1663         if (s->is_initial)
1664                 color_fprintf(s->fp, header_color, _("Initial commit on "));
1665
1666         if (!strcmp(s->branch, "HEAD")) {
1667                 color_fprintf(s->fp, color(WT_STATUS_NOBRANCH, s), "%s",
1668                               _("HEAD (no branch)"));
1669                 goto conclude;
1670         }
1671
1672         skip_prefix(branch_name, "refs/heads/", &branch_name);
1673
1674         branch = branch_get(branch_name);
1675
1676         color_fprintf(s->fp, branch_color_local, "%s", branch_name);
1677
1678         if (stat_tracking_info(branch, &num_ours, &num_theirs, &base) < 0) {
1679                 if (!base)
1680                         goto conclude;
1681
1682                 upstream_is_gone = 1;
1683         }
1684
1685         base = shorten_unambiguous_ref(base, 0);
1686         color_fprintf(s->fp, header_color, "...");
1687         color_fprintf(s->fp, branch_color_remote, "%s", base);
1688         free((char *)base);
1689
1690         if (!upstream_is_gone && !num_ours && !num_theirs)
1691                 goto conclude;
1692
1693 #define LABEL(string) (s->no_gettext ? (string) : _(string))
1694
1695         color_fprintf(s->fp, header_color, " [");
1696         if (upstream_is_gone) {
1697                 color_fprintf(s->fp, header_color, LABEL(N_("gone")));
1698         } else if (!num_ours) {
1699                 color_fprintf(s->fp, header_color, LABEL(N_("behind ")));
1700                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1701         } else if (!num_theirs) {
1702                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1703                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1704         } else {
1705                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1706                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1707                 color_fprintf(s->fp, header_color, ", %s", LABEL(N_("behind ")));
1708                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1709         }
1710
1711         color_fprintf(s->fp, header_color, "]");
1712  conclude:
1713         fputc(s->null_termination ? '\0' : '\n', s->fp);
1714 }
1715
1716 void wt_shortstatus_print(struct wt_status *s)
1717 {
1718         int i;
1719
1720         if (s->show_branch)
1721                 wt_shortstatus_print_tracking(s);
1722
1723         for (i = 0; i < s->change.nr; i++) {
1724                 struct wt_status_change_data *d;
1725                 struct string_list_item *it;
1726
1727                 it = &(s->change.items[i]);
1728                 d = it->util;
1729                 if (d->stagemask)
1730                         wt_shortstatus_unmerged(it, s);
1731                 else
1732                         wt_shortstatus_status(it, s);
1733         }
1734         for (i = 0; i < s->untracked.nr; i++) {
1735                 struct string_list_item *it;
1736
1737                 it = &(s->untracked.items[i]);
1738                 wt_shortstatus_other(it, s, "??");
1739         }
1740         for (i = 0; i < s->ignored.nr; i++) {
1741                 struct string_list_item *it;
1742
1743                 it = &(s->ignored.items[i]);
1744                 wt_shortstatus_other(it, s, "!!");
1745         }
1746 }
1747
1748 void wt_porcelain_print(struct wt_status *s)
1749 {
1750         s->use_color = 0;
1751         s->relative_paths = 0;
1752         s->prefix = NULL;
1753         s->no_gettext = 1;
1754         wt_shortstatus_print(s);
1755 }