Merge branch 'jk/reflog-date'
[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 = !!oidcmp(&p->one->oid,
436                                                             &p->two->oid);
437         }
438 }
439
440 static int unmerged_mask(const char *path)
441 {
442         int pos, mask;
443         const struct cache_entry *ce;
444
445         pos = cache_name_pos(path, strlen(path));
446         if (0 <= pos)
447                 return 0;
448
449         mask = 0;
450         pos = -pos-1;
451         while (pos < active_nr) {
452                 ce = active_cache[pos++];
453                 if (strcmp(ce->name, path) || !ce_stage(ce))
454                         break;
455                 mask |= (1 << (ce_stage(ce) - 1));
456         }
457         return mask;
458 }
459
460 static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
461                                          struct diff_options *options,
462                                          void *data)
463 {
464         struct wt_status *s = data;
465         int i;
466
467         for (i = 0; i < q->nr; i++) {
468                 struct diff_filepair *p;
469                 struct string_list_item *it;
470                 struct wt_status_change_data *d;
471
472                 p = q->queue[i];
473                 it = string_list_insert(&s->change, p->two->path);
474                 d = it->util;
475                 if (!d) {
476                         d = xcalloc(1, sizeof(*d));
477                         it->util = d;
478                 }
479                 if (!d->index_status)
480                         d->index_status = p->status;
481                 switch (p->status) {
482                 case DIFF_STATUS_COPIED:
483                 case DIFF_STATUS_RENAMED:
484                         d->head_path = xstrdup(p->one->path);
485                         break;
486                 case DIFF_STATUS_UNMERGED:
487                         d->stagemask = unmerged_mask(p->two->path);
488                         break;
489                 }
490         }
491 }
492
493 static void wt_status_collect_changes_worktree(struct wt_status *s)
494 {
495         struct rev_info rev;
496
497         init_revisions(&rev, NULL);
498         setup_revisions(0, NULL, &rev, NULL);
499         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
500         DIFF_OPT_SET(&rev.diffopt, DIRTY_SUBMODULES);
501         if (!s->show_untracked_files)
502                 DIFF_OPT_SET(&rev.diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
503         if (s->ignore_submodule_arg) {
504                 DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
505                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
506         }
507         rev.diffopt.format_callback = wt_status_collect_changed_cb;
508         rev.diffopt.format_callback_data = s;
509         copy_pathspec(&rev.prune_data, &s->pathspec);
510         run_diff_files(&rev, 0);
511 }
512
513 static void wt_status_collect_changes_index(struct wt_status *s)
514 {
515         struct rev_info rev;
516         struct setup_revision_opt opt;
517
518         init_revisions(&rev, NULL);
519         memset(&opt, 0, sizeof(opt));
520         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
521         setup_revisions(0, NULL, &rev, &opt);
522
523         DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
524         if (s->ignore_submodule_arg) {
525                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
526         } else {
527                 /*
528                  * Unless the user did explicitly request a submodule ignore
529                  * mode by passing a command line option we do not ignore any
530                  * changed submodule SHA-1s when comparing index and HEAD, no
531                  * matter what is configured. Otherwise the user won't be
532                  * shown any submodules she manually added (and which are
533                  * staged to be committed), which would be really confusing.
534                  */
535                 handle_ignore_submodules_arg(&rev.diffopt, "dirty");
536         }
537
538         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
539         rev.diffopt.format_callback = wt_status_collect_updated_cb;
540         rev.diffopt.format_callback_data = s;
541         rev.diffopt.detect_rename = 1;
542         rev.diffopt.rename_limit = 200;
543         rev.diffopt.break_opt = 0;
544         copy_pathspec(&rev.prune_data, &s->pathspec);
545         run_diff_index(&rev, 1);
546 }
547
548 static void wt_status_collect_changes_initial(struct wt_status *s)
549 {
550         int i;
551
552         for (i = 0; i < active_nr; i++) {
553                 struct string_list_item *it;
554                 struct wt_status_change_data *d;
555                 const struct cache_entry *ce = active_cache[i];
556
557                 if (!ce_path_match(ce, &s->pathspec, NULL))
558                         continue;
559                 it = string_list_insert(&s->change, ce->name);
560                 d = it->util;
561                 if (!d) {
562                         d = xcalloc(1, sizeof(*d));
563                         it->util = d;
564                 }
565                 if (ce_stage(ce)) {
566                         d->index_status = DIFF_STATUS_UNMERGED;
567                         d->stagemask |= (1 << (ce_stage(ce) - 1));
568                 }
569                 else
570                         d->index_status = DIFF_STATUS_ADDED;
571         }
572 }
573
574 static void wt_status_collect_untracked(struct wt_status *s)
575 {
576         int i;
577         struct dir_struct dir;
578         uint64_t t_begin = getnanotime();
579
580         if (!s->show_untracked_files)
581                 return;
582
583         memset(&dir, 0, sizeof(dir));
584         if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
585                 dir.flags |=
586                         DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
587         if (s->show_ignored_files)
588                 dir.flags |= DIR_SHOW_IGNORED_TOO;
589         else
590                 dir.untracked = the_index.untracked;
591         setup_standard_excludes(&dir);
592
593         fill_directory(&dir, &s->pathspec);
594
595         for (i = 0; i < dir.nr; i++) {
596                 struct dir_entry *ent = dir.entries[i];
597                 if (cache_name_is_other(ent->name, ent->len) &&
598                     dir_path_match(ent, &s->pathspec, 0, NULL))
599                         string_list_insert(&s->untracked, ent->name);
600                 free(ent);
601         }
602
603         for (i = 0; i < dir.ignored_nr; i++) {
604                 struct dir_entry *ent = dir.ignored[i];
605                 if (cache_name_is_other(ent->name, ent->len) &&
606                     dir_path_match(ent, &s->pathspec, 0, NULL))
607                         string_list_insert(&s->ignored, ent->name);
608                 free(ent);
609         }
610
611         free(dir.entries);
612         free(dir.ignored);
613         clear_directory(&dir);
614
615         if (advice_status_u_option)
616                 s->untracked_in_ms = (getnanotime() - t_begin) / 1000000;
617 }
618
619 void wt_status_collect(struct wt_status *s)
620 {
621         wt_status_collect_changes_worktree(s);
622
623         if (s->is_initial)
624                 wt_status_collect_changes_initial(s);
625         else
626                 wt_status_collect_changes_index(s);
627         wt_status_collect_untracked(s);
628 }
629
630 static void wt_status_print_unmerged(struct wt_status *s)
631 {
632         int shown_header = 0;
633         int i;
634
635         for (i = 0; i < s->change.nr; i++) {
636                 struct wt_status_change_data *d;
637                 struct string_list_item *it;
638                 it = &(s->change.items[i]);
639                 d = it->util;
640                 if (!d->stagemask)
641                         continue;
642                 if (!shown_header) {
643                         wt_status_print_unmerged_header(s);
644                         shown_header = 1;
645                 }
646                 wt_status_print_unmerged_data(s, it);
647         }
648         if (shown_header)
649                 wt_status_print_trailer(s);
650
651 }
652
653 static void wt_status_print_updated(struct wt_status *s)
654 {
655         int shown_header = 0;
656         int i;
657
658         for (i = 0; i < s->change.nr; i++) {
659                 struct wt_status_change_data *d;
660                 struct string_list_item *it;
661                 it = &(s->change.items[i]);
662                 d = it->util;
663                 if (!d->index_status ||
664                     d->index_status == DIFF_STATUS_UNMERGED)
665                         continue;
666                 if (!shown_header) {
667                         wt_status_print_cached_header(s);
668                         s->commitable = 1;
669                         shown_header = 1;
670                 }
671                 wt_status_print_change_data(s, WT_STATUS_UPDATED, it);
672         }
673         if (shown_header)
674                 wt_status_print_trailer(s);
675 }
676
677 /*
678  * -1 : has delete
679  *  0 : no change
680  *  1 : some change but no delete
681  */
682 static int wt_status_check_worktree_changes(struct wt_status *s,
683                                              int *dirty_submodules)
684 {
685         int i;
686         int changes = 0;
687
688         *dirty_submodules = 0;
689
690         for (i = 0; i < s->change.nr; i++) {
691                 struct wt_status_change_data *d;
692                 d = s->change.items[i].util;
693                 if (!d->worktree_status ||
694                     d->worktree_status == DIFF_STATUS_UNMERGED)
695                         continue;
696                 if (!changes)
697                         changes = 1;
698                 if (d->dirty_submodule)
699                         *dirty_submodules = 1;
700                 if (d->worktree_status == DIFF_STATUS_DELETED)
701                         changes = -1;
702         }
703         return changes;
704 }
705
706 static void wt_status_print_changed(struct wt_status *s)
707 {
708         int i, dirty_submodules;
709         int worktree_changes = wt_status_check_worktree_changes(s, &dirty_submodules);
710
711         if (!worktree_changes)
712                 return;
713
714         wt_status_print_dirty_header(s, worktree_changes < 0, dirty_submodules);
715
716         for (i = 0; i < s->change.nr; i++) {
717                 struct wt_status_change_data *d;
718                 struct string_list_item *it;
719                 it = &(s->change.items[i]);
720                 d = it->util;
721                 if (!d->worktree_status ||
722                     d->worktree_status == DIFF_STATUS_UNMERGED)
723                         continue;
724                 wt_status_print_change_data(s, WT_STATUS_CHANGED, it);
725         }
726         wt_status_print_trailer(s);
727 }
728
729 static void wt_status_print_submodule_summary(struct wt_status *s, int uncommitted)
730 {
731         struct child_process sm_summary = CHILD_PROCESS_INIT;
732         struct strbuf cmd_stdout = STRBUF_INIT;
733         struct strbuf summary = STRBUF_INIT;
734         char *summary_content;
735
736         argv_array_pushf(&sm_summary.env_array, "GIT_INDEX_FILE=%s",
737                          s->index_file);
738
739         argv_array_push(&sm_summary.args, "submodule");
740         argv_array_push(&sm_summary.args, "summary");
741         argv_array_push(&sm_summary.args, uncommitted ? "--files" : "--cached");
742         argv_array_push(&sm_summary.args, "--for-status");
743         argv_array_push(&sm_summary.args, "--summary-limit");
744         argv_array_pushf(&sm_summary.args, "%d", s->submodule_summary);
745         if (!uncommitted)
746                 argv_array_push(&sm_summary.args, s->amend ? "HEAD^" : "HEAD");
747
748         sm_summary.git_cmd = 1;
749         sm_summary.no_stdin = 1;
750
751         capture_command(&sm_summary, &cmd_stdout, 1024);
752
753         /* prepend header, only if there's an actual output */
754         if (cmd_stdout.len) {
755                 if (uncommitted)
756                         strbuf_addstr(&summary, _("Submodules changed but not updated:"));
757                 else
758                         strbuf_addstr(&summary, _("Submodule changes to be committed:"));
759                 strbuf_addstr(&summary, "\n\n");
760         }
761         strbuf_addbuf(&summary, &cmd_stdout);
762         strbuf_release(&cmd_stdout);
763
764         if (s->display_comment_prefix) {
765                 size_t len;
766                 summary_content = strbuf_detach(&summary, &len);
767                 strbuf_add_commented_lines(&summary, summary_content, len);
768                 free(summary_content);
769         }
770
771         fputs(summary.buf, s->fp);
772         strbuf_release(&summary);
773 }
774
775 static void wt_status_print_other(struct wt_status *s,
776                                   struct string_list *l,
777                                   const char *what,
778                                   const char *how)
779 {
780         int i;
781         struct strbuf buf = STRBUF_INIT;
782         static struct string_list output = STRING_LIST_INIT_DUP;
783         struct column_options copts;
784
785         if (!l->nr)
786                 return;
787
788         wt_status_print_other_header(s, what, how);
789
790         for (i = 0; i < l->nr; i++) {
791                 struct string_list_item *it;
792                 const char *path;
793                 it = &(l->items[i]);
794                 path = quote_path(it->string, s->prefix, &buf);
795                 if (column_active(s->colopts)) {
796                         string_list_append(&output, path);
797                         continue;
798                 }
799                 status_printf(s, color(WT_STATUS_HEADER, s), "\t");
800                 status_printf_more(s, color(WT_STATUS_UNTRACKED, s),
801                                    "%s\n", path);
802         }
803
804         strbuf_release(&buf);
805         if (!column_active(s->colopts))
806                 goto conclude;
807
808         strbuf_addf(&buf, "%s%s\t%s",
809                     color(WT_STATUS_HEADER, s),
810                     s->display_comment_prefix ? "#" : "",
811                     color(WT_STATUS_UNTRACKED, s));
812         memset(&copts, 0, sizeof(copts));
813         copts.padding = 1;
814         copts.indent = buf.buf;
815         if (want_color(s->use_color))
816                 copts.nl = GIT_COLOR_RESET "\n";
817         print_columns(&output, s->colopts, &copts);
818         string_list_clear(&output, 0);
819         strbuf_release(&buf);
820 conclude:
821         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
822 }
823
824 void wt_status_truncate_message_at_cut_line(struct strbuf *buf)
825 {
826         const char *p;
827         struct strbuf pattern = STRBUF_INIT;
828
829         strbuf_addf(&pattern, "\n%c %s", comment_line_char, cut_line);
830         if (starts_with(buf->buf, pattern.buf + 1))
831                 strbuf_setlen(buf, 0);
832         else if ((p = strstr(buf->buf, pattern.buf)))
833                 strbuf_setlen(buf, p - buf->buf + 1);
834         strbuf_release(&pattern);
835 }
836
837 void wt_status_add_cut_line(FILE *fp)
838 {
839         const char *explanation = _("Do not touch the line above.\nEverything below will be removed.");
840         struct strbuf buf = STRBUF_INIT;
841
842         fprintf(fp, "%c %s", comment_line_char, cut_line);
843         strbuf_add_commented_lines(&buf, explanation, strlen(explanation));
844         fputs(buf.buf, fp);
845         strbuf_release(&buf);
846 }
847
848 static void wt_status_print_verbose(struct wt_status *s)
849 {
850         struct rev_info rev;
851         struct setup_revision_opt opt;
852         int dirty_submodules;
853         const char *c = color(WT_STATUS_HEADER, s);
854
855         init_revisions(&rev, NULL);
856         DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
857
858         memset(&opt, 0, sizeof(opt));
859         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
860         setup_revisions(0, NULL, &rev, &opt);
861
862         rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
863         rev.diffopt.detect_rename = 1;
864         rev.diffopt.file = s->fp;
865         rev.diffopt.close_file = 0;
866         /*
867          * If we're not going to stdout, then we definitely don't
868          * want color, since we are going to the commit message
869          * file (and even the "auto" setting won't work, since it
870          * will have checked isatty on stdout). But we then do want
871          * to insert the scissor line here to reliably remove the
872          * diff before committing.
873          */
874         if (s->fp != stdout) {
875                 rev.diffopt.use_color = 0;
876                 wt_status_add_cut_line(s->fp);
877         }
878         if (s->verbose > 1 && s->commitable) {
879                 /* print_updated() printed a header, so do we */
880                 if (s->fp != stdout)
881                         wt_status_print_trailer(s);
882                 status_printf_ln(s, c, _("Changes to be committed:"));
883                 rev.diffopt.a_prefix = "c/";
884                 rev.diffopt.b_prefix = "i/";
885         } /* else use prefix as per user config */
886         run_diff_index(&rev, 1);
887         if (s->verbose > 1 &&
888             wt_status_check_worktree_changes(s, &dirty_submodules)) {
889                 status_printf_ln(s, c,
890                         "--------------------------------------------------");
891                 status_printf_ln(s, c, _("Changes not staged for commit:"));
892                 setup_work_tree();
893                 rev.diffopt.a_prefix = "i/";
894                 rev.diffopt.b_prefix = "w/";
895                 run_diff_files(&rev, 0);
896         }
897 }
898
899 static void wt_status_print_tracking(struct wt_status *s)
900 {
901         struct strbuf sb = STRBUF_INIT;
902         const char *cp, *ep, *branch_name;
903         struct branch *branch;
904         char comment_line_string[3];
905         int i;
906
907         assert(s->branch && !s->is_initial);
908         if (!skip_prefix(s->branch, "refs/heads/", &branch_name))
909                 return;
910         branch = branch_get(branch_name);
911         if (!format_tracking_info(branch, &sb))
912                 return;
913
914         i = 0;
915         if (s->display_comment_prefix) {
916                 comment_line_string[i++] = comment_line_char;
917                 comment_line_string[i++] = ' ';
918         }
919         comment_line_string[i] = '\0';
920
921         for (cp = sb.buf; (ep = strchr(cp, '\n')) != NULL; cp = ep + 1)
922                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s),
923                                  "%s%.*s", comment_line_string,
924                                  (int)(ep - cp), cp);
925         if (s->display_comment_prefix)
926                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "%c",
927                                  comment_line_char);
928         else
929                 fputs("", s->fp);
930 }
931
932 static int has_unmerged(struct wt_status *s)
933 {
934         int i;
935
936         for (i = 0; i < s->change.nr; i++) {
937                 struct wt_status_change_data *d;
938                 d = s->change.items[i].util;
939                 if (d->stagemask)
940                         return 1;
941         }
942         return 0;
943 }
944
945 static void show_merge_in_progress(struct wt_status *s,
946                                 struct wt_status_state *state,
947                                 const char *color)
948 {
949         if (has_unmerged(s)) {
950                 status_printf_ln(s, color, _("You have unmerged paths."));
951                 if (s->hints) {
952                         status_printf_ln(s, color,
953                                          _("  (fix conflicts and run \"git commit\")"));
954                         status_printf_ln(s, color,
955                                          _("  (use \"git merge --abort\" to abort the merge)"));
956                 }
957         } else {
958                 s-> commitable = 1;
959                 status_printf_ln(s, color,
960                         _("All conflicts fixed but you are still merging."));
961                 if (s->hints)
962                         status_printf_ln(s, color,
963                                 _("  (use \"git commit\" to conclude merge)"));
964         }
965         wt_status_print_trailer(s);
966 }
967
968 static void show_am_in_progress(struct wt_status *s,
969                                 struct wt_status_state *state,
970                                 const char *color)
971 {
972         status_printf_ln(s, color,
973                 _("You are in the middle of an am session."));
974         if (state->am_empty_patch)
975                 status_printf_ln(s, color,
976                         _("The current patch is empty."));
977         if (s->hints) {
978                 if (!state->am_empty_patch)
979                         status_printf_ln(s, color,
980                                 _("  (fix conflicts and then run \"git am --continue\")"));
981                 status_printf_ln(s, color,
982                         _("  (use \"git am --skip\" to skip this patch)"));
983                 status_printf_ln(s, color,
984                         _("  (use \"git am --abort\" to restore the original branch)"));
985         }
986         wt_status_print_trailer(s);
987 }
988
989 static char *read_line_from_git_path(const char *filename)
990 {
991         struct strbuf buf = STRBUF_INIT;
992         FILE *fp = fopen(git_path("%s", filename), "r");
993         if (!fp) {
994                 strbuf_release(&buf);
995                 return NULL;
996         }
997         strbuf_getline_lf(&buf, fp);
998         if (!fclose(fp)) {
999                 return strbuf_detach(&buf, NULL);
1000         } else {
1001                 strbuf_release(&buf);
1002                 return NULL;
1003         }
1004 }
1005
1006 static int split_commit_in_progress(struct wt_status *s)
1007 {
1008         int split_in_progress = 0;
1009         char *head = read_line_from_git_path("HEAD");
1010         char *orig_head = read_line_from_git_path("ORIG_HEAD");
1011         char *rebase_amend = read_line_from_git_path("rebase-merge/amend");
1012         char *rebase_orig_head = read_line_from_git_path("rebase-merge/orig-head");
1013
1014         if (!head || !orig_head || !rebase_amend || !rebase_orig_head ||
1015             !s->branch || strcmp(s->branch, "HEAD"))
1016                 return split_in_progress;
1017
1018         if (!strcmp(rebase_amend, rebase_orig_head)) {
1019                 if (strcmp(head, rebase_amend))
1020                         split_in_progress = 1;
1021         } else if (strcmp(orig_head, rebase_orig_head)) {
1022                 split_in_progress = 1;
1023         }
1024
1025         if (!s->amend && !s->nowarn && !s->workdir_dirty)
1026                 split_in_progress = 0;
1027
1028         free(head);
1029         free(orig_head);
1030         free(rebase_amend);
1031         free(rebase_orig_head);
1032         return split_in_progress;
1033 }
1034
1035 /*
1036  * Turn
1037  * "pick d6a2f0303e897ec257dd0e0a39a5ccb709bc2047 some message"
1038  * into
1039  * "pick d6a2f03 some message"
1040  *
1041  * The function assumes that the line does not contain useless spaces
1042  * before or after the command.
1043  */
1044 static void abbrev_sha1_in_line(struct strbuf *line)
1045 {
1046         struct strbuf **split;
1047         int i;
1048
1049         if (starts_with(line->buf, "exec ") ||
1050             starts_with(line->buf, "x "))
1051                 return;
1052
1053         split = strbuf_split_max(line, ' ', 3);
1054         if (split[0] && split[1]) {
1055                 unsigned char sha1[20];
1056                 const char *abbrev;
1057
1058                 /*
1059                  * strbuf_split_max left a space. Trim it and re-add
1060                  * it after abbreviation.
1061                  */
1062                 strbuf_trim(split[1]);
1063                 if (!get_sha1(split[1]->buf, sha1)) {
1064                         abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
1065                         strbuf_reset(split[1]);
1066                         strbuf_addf(split[1], "%s ", abbrev);
1067                         strbuf_reset(line);
1068                         for (i = 0; split[i]; i++)
1069                                 strbuf_addbuf(line, split[i]);
1070                 }
1071         }
1072         strbuf_list_free(split);
1073 }
1074
1075 static void read_rebase_todolist(const char *fname, struct string_list *lines)
1076 {
1077         struct strbuf line = STRBUF_INIT;
1078         FILE *f = fopen(git_path("%s", fname), "r");
1079
1080         if (!f)
1081                 die_errno("Could not open file %s for reading",
1082                           git_path("%s", fname));
1083         while (!strbuf_getline_lf(&line, f)) {
1084                 if (line.len && line.buf[0] == comment_line_char)
1085                         continue;
1086                 strbuf_trim(&line);
1087                 if (!line.len)
1088                         continue;
1089                 abbrev_sha1_in_line(&line);
1090                 string_list_append(lines, line.buf);
1091         }
1092 }
1093
1094 static void show_rebase_information(struct wt_status *s,
1095                                         struct wt_status_state *state,
1096                                         const char *color)
1097 {
1098         if (state->rebase_interactive_in_progress) {
1099                 int i;
1100                 int nr_lines_to_show = 2;
1101
1102                 struct string_list have_done = STRING_LIST_INIT_DUP;
1103                 struct string_list yet_to_do = STRING_LIST_INIT_DUP;
1104
1105                 read_rebase_todolist("rebase-merge/done", &have_done);
1106                 read_rebase_todolist("rebase-merge/git-rebase-todo", &yet_to_do);
1107
1108                 if (have_done.nr == 0)
1109                         status_printf_ln(s, color, _("No commands done."));
1110                 else {
1111                         status_printf_ln(s, color,
1112                                 Q_("Last command done (%d command done):",
1113                                         "Last commands done (%d commands done):",
1114                                         have_done.nr),
1115                                 have_done.nr);
1116                         for (i = (have_done.nr > nr_lines_to_show)
1117                                 ? have_done.nr - nr_lines_to_show : 0;
1118                                 i < have_done.nr;
1119                                 i++)
1120                                 status_printf_ln(s, color, "   %s", have_done.items[i].string);
1121                         if (have_done.nr > nr_lines_to_show && s->hints)
1122                                 status_printf_ln(s, color,
1123                                         _("  (see more in file %s)"), git_path("rebase-merge/done"));
1124                 }
1125
1126                 if (yet_to_do.nr == 0)
1127                         status_printf_ln(s, color,
1128                                          _("No commands remaining."));
1129                 else {
1130                         status_printf_ln(s, color,
1131                                 Q_("Next command to do (%d remaining command):",
1132                                         "Next commands to do (%d remaining commands):",
1133                                         yet_to_do.nr),
1134                                 yet_to_do.nr);
1135                         for (i = 0; i < nr_lines_to_show && i < yet_to_do.nr; i++)
1136                                 status_printf_ln(s, color, "   %s", yet_to_do.items[i].string);
1137                         if (s->hints)
1138                                 status_printf_ln(s, color,
1139                                         _("  (use \"git rebase --edit-todo\" to view and edit)"));
1140                 }
1141                 string_list_clear(&yet_to_do, 0);
1142                 string_list_clear(&have_done, 0);
1143         }
1144 }
1145
1146 static void print_rebase_state(struct wt_status *s,
1147                                 struct wt_status_state *state,
1148                                 const char *color)
1149 {
1150         if (state->branch)
1151                 status_printf_ln(s, color,
1152                                  _("You are currently rebasing branch '%s' on '%s'."),
1153                                  state->branch,
1154                                  state->onto);
1155         else
1156                 status_printf_ln(s, color,
1157                                  _("You are currently rebasing."));
1158 }
1159
1160 static void show_rebase_in_progress(struct wt_status *s,
1161                                 struct wt_status_state *state,
1162                                 const char *color)
1163 {
1164         struct stat st;
1165
1166         show_rebase_information(s, state, color);
1167         if (has_unmerged(s)) {
1168                 print_rebase_state(s, state, color);
1169                 if (s->hints) {
1170                         status_printf_ln(s, color,
1171                                 _("  (fix conflicts and then run \"git rebase --continue\")"));
1172                         status_printf_ln(s, color,
1173                                 _("  (use \"git rebase --skip\" to skip this patch)"));
1174                         status_printf_ln(s, color,
1175                                 _("  (use \"git rebase --abort\" to check out the original branch)"));
1176                 }
1177         } else if (state->rebase_in_progress || !stat(git_path_merge_msg(), &st)) {
1178                 print_rebase_state(s, state, color);
1179                 if (s->hints)
1180                         status_printf_ln(s, color,
1181                                 _("  (all conflicts fixed: run \"git rebase --continue\")"));
1182         } else if (split_commit_in_progress(s)) {
1183                 if (state->branch)
1184                         status_printf_ln(s, color,
1185                                          _("You are currently splitting a commit while rebasing branch '%s' on '%s'."),
1186                                          state->branch,
1187                                          state->onto);
1188                 else
1189                         status_printf_ln(s, color,
1190                                          _("You are currently splitting a commit during a rebase."));
1191                 if (s->hints)
1192                         status_printf_ln(s, color,
1193                                 _("  (Once your working directory is clean, run \"git rebase --continue\")"));
1194         } else {
1195                 if (state->branch)
1196                         status_printf_ln(s, color,
1197                                          _("You are currently editing a commit while rebasing branch '%s' on '%s'."),
1198                                          state->branch,
1199                                          state->onto);
1200                 else
1201                         status_printf_ln(s, color,
1202                                          _("You are currently editing a commit during a rebase."));
1203                 if (s->hints && !s->amend) {
1204                         status_printf_ln(s, color,
1205                                 _("  (use \"git commit --amend\" to amend the current commit)"));
1206                         status_printf_ln(s, color,
1207                                 _("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
1208                 }
1209         }
1210         wt_status_print_trailer(s);
1211 }
1212
1213 static void show_cherry_pick_in_progress(struct wt_status *s,
1214                                         struct wt_status_state *state,
1215                                         const char *color)
1216 {
1217         status_printf_ln(s, color, _("You are currently cherry-picking commit %s."),
1218                         find_unique_abbrev(state->cherry_pick_head_sha1, DEFAULT_ABBREV));
1219         if (s->hints) {
1220                 if (has_unmerged(s))
1221                         status_printf_ln(s, color,
1222                                 _("  (fix conflicts and run \"git cherry-pick --continue\")"));
1223                 else
1224                         status_printf_ln(s, color,
1225                                 _("  (all conflicts fixed: run \"git cherry-pick --continue\")"));
1226                 status_printf_ln(s, color,
1227                         _("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
1228         }
1229         wt_status_print_trailer(s);
1230 }
1231
1232 static void show_revert_in_progress(struct wt_status *s,
1233                                         struct wt_status_state *state,
1234                                         const char *color)
1235 {
1236         status_printf_ln(s, color, _("You are currently reverting commit %s."),
1237                          find_unique_abbrev(state->revert_head_sha1, DEFAULT_ABBREV));
1238         if (s->hints) {
1239                 if (has_unmerged(s))
1240                         status_printf_ln(s, color,
1241                                 _("  (fix conflicts and run \"git revert --continue\")"));
1242                 else
1243                         status_printf_ln(s, color,
1244                                 _("  (all conflicts fixed: run \"git revert --continue\")"));
1245                 status_printf_ln(s, color,
1246                         _("  (use \"git revert --abort\" to cancel the revert operation)"));
1247         }
1248         wt_status_print_trailer(s);
1249 }
1250
1251 static void show_bisect_in_progress(struct wt_status *s,
1252                                 struct wt_status_state *state,
1253                                 const char *color)
1254 {
1255         if (state->branch)
1256                 status_printf_ln(s, color,
1257                                  _("You are currently bisecting, started from branch '%s'."),
1258                                  state->branch);
1259         else
1260                 status_printf_ln(s, color,
1261                                  _("You are currently bisecting."));
1262         if (s->hints)
1263                 status_printf_ln(s, color,
1264                         _("  (use \"git bisect reset\" to get back to the original branch)"));
1265         wt_status_print_trailer(s);
1266 }
1267
1268 /*
1269  * Extract branch information from rebase/bisect
1270  */
1271 static char *get_branch(const struct worktree *wt, const char *path)
1272 {
1273         struct strbuf sb = STRBUF_INIT;
1274         unsigned char sha1[20];
1275         const char *branch_name;
1276
1277         if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
1278                 goto got_nothing;
1279
1280         while (sb.len && sb.buf[sb.len - 1] == '\n')
1281                 strbuf_setlen(&sb, sb.len - 1);
1282         if (!sb.len)
1283                 goto got_nothing;
1284         if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
1285                 strbuf_remove(&sb, 0, branch_name - sb.buf);
1286         else if (starts_with(sb.buf, "refs/"))
1287                 ;
1288         else if (!get_sha1_hex(sb.buf, sha1)) {
1289                 const char *abbrev;
1290                 abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
1291                 strbuf_reset(&sb);
1292                 strbuf_addstr(&sb, abbrev);
1293         } else if (!strcmp(sb.buf, "detached HEAD")) /* rebase */
1294                 goto got_nothing;
1295         else                    /* bisect */
1296                 ;
1297         return strbuf_detach(&sb, NULL);
1298
1299 got_nothing:
1300         strbuf_release(&sb);
1301         return NULL;
1302 }
1303
1304 struct grab_1st_switch_cbdata {
1305         struct strbuf buf;
1306         unsigned char nsha1[20];
1307 };
1308
1309 static int grab_1st_switch(unsigned char *osha1, unsigned char *nsha1,
1310                            const char *email, unsigned long timestamp, int tz,
1311                            const char *message, void *cb_data)
1312 {
1313         struct grab_1st_switch_cbdata *cb = cb_data;
1314         const char *target = NULL, *end;
1315
1316         if (!skip_prefix(message, "checkout: moving from ", &message))
1317                 return 0;
1318         target = strstr(message, " to ");
1319         if (!target)
1320                 return 0;
1321         target += strlen(" to ");
1322         strbuf_reset(&cb->buf);
1323         hashcpy(cb->nsha1, nsha1);
1324         end = strchrnul(target, '\n');
1325         strbuf_add(&cb->buf, target, end - target);
1326         if (!strcmp(cb->buf.buf, "HEAD")) {
1327                 /* HEAD is relative. Resolve it to the right reflog entry. */
1328                 strbuf_reset(&cb->buf);
1329                 strbuf_addstr(&cb->buf,
1330                               find_unique_abbrev(nsha1, DEFAULT_ABBREV));
1331         }
1332         return 1;
1333 }
1334
1335 static void wt_status_get_detached_from(struct wt_status_state *state)
1336 {
1337         struct grab_1st_switch_cbdata cb;
1338         struct commit *commit;
1339         unsigned char sha1[20];
1340         char *ref = NULL;
1341
1342         strbuf_init(&cb.buf, 0);
1343         if (for_each_reflog_ent_reverse("HEAD", grab_1st_switch, &cb) <= 0) {
1344                 strbuf_release(&cb.buf);
1345                 return;
1346         }
1347
1348         if (dwim_ref(cb.buf.buf, cb.buf.len, sha1, &ref) == 1 &&
1349             /* sha1 is a commit? match without further lookup */
1350             (!hashcmp(cb.nsha1, sha1) ||
1351              /* perhaps sha1 is a tag, try to dereference to a commit */
1352              ((commit = lookup_commit_reference_gently(sha1, 1)) != NULL &&
1353               !hashcmp(cb.nsha1, commit->object.oid.hash)))) {
1354                 const char *from = ref;
1355                 if (!skip_prefix(from, "refs/tags/", &from))
1356                         skip_prefix(from, "refs/remotes/", &from);
1357                 state->detached_from = xstrdup(from);
1358         } else
1359                 state->detached_from =
1360                         xstrdup(find_unique_abbrev(cb.nsha1, DEFAULT_ABBREV));
1361         hashcpy(state->detached_sha1, cb.nsha1);
1362         state->detached_at = !get_sha1("HEAD", sha1) &&
1363                              !hashcmp(sha1, state->detached_sha1);
1364
1365         free(ref);
1366         strbuf_release(&cb.buf);
1367 }
1368
1369 int wt_status_check_rebase(const struct worktree *wt,
1370                            struct wt_status_state *state)
1371 {
1372         struct stat st;
1373
1374         if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
1375                 if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
1376                         state->am_in_progress = 1;
1377                         if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
1378                                 state->am_empty_patch = 1;
1379                 } else {
1380                         state->rebase_in_progress = 1;
1381                         state->branch = get_branch(wt, "rebase-apply/head-name");
1382                         state->onto = get_branch(wt, "rebase-apply/onto");
1383                 }
1384         } else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
1385                 if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
1386                         state->rebase_interactive_in_progress = 1;
1387                 else
1388                         state->rebase_in_progress = 1;
1389                 state->branch = get_branch(wt, "rebase-merge/head-name");
1390                 state->onto = get_branch(wt, "rebase-merge/onto");
1391         } else
1392                 return 0;
1393         return 1;
1394 }
1395
1396 int wt_status_check_bisect(const struct worktree *wt,
1397                            struct wt_status_state *state)
1398 {
1399         struct stat st;
1400
1401         if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
1402                 state->bisect_in_progress = 1;
1403                 state->branch = get_branch(wt, "BISECT_START");
1404                 return 1;
1405         }
1406         return 0;
1407 }
1408
1409 void wt_status_get_state(struct wt_status_state *state,
1410                          int get_detached_from)
1411 {
1412         struct stat st;
1413         unsigned char sha1[20];
1414
1415         if (!stat(git_path_merge_head(), &st)) {
1416                 state->merge_in_progress = 1;
1417         } else if (wt_status_check_rebase(NULL, state)) {
1418                 ;               /* all set */
1419         } else if (!stat(git_path_cherry_pick_head(), &st) &&
1420                         !get_sha1("CHERRY_PICK_HEAD", sha1)) {
1421                 state->cherry_pick_in_progress = 1;
1422                 hashcpy(state->cherry_pick_head_sha1, sha1);
1423         }
1424         wt_status_check_bisect(NULL, state);
1425         if (!stat(git_path_revert_head(), &st) &&
1426             !get_sha1("REVERT_HEAD", sha1)) {
1427                 state->revert_in_progress = 1;
1428                 hashcpy(state->revert_head_sha1, sha1);
1429         }
1430
1431         if (get_detached_from)
1432                 wt_status_get_detached_from(state);
1433 }
1434
1435 static void wt_status_print_state(struct wt_status *s,
1436                                   struct wt_status_state *state)
1437 {
1438         const char *state_color = color(WT_STATUS_HEADER, s);
1439         if (state->merge_in_progress)
1440                 show_merge_in_progress(s, state, state_color);
1441         else if (state->am_in_progress)
1442                 show_am_in_progress(s, state, state_color);
1443         else if (state->rebase_in_progress || state->rebase_interactive_in_progress)
1444                 show_rebase_in_progress(s, state, state_color);
1445         else if (state->cherry_pick_in_progress)
1446                 show_cherry_pick_in_progress(s, state, state_color);
1447         else if (state->revert_in_progress)
1448                 show_revert_in_progress(s, state, state_color);
1449         if (state->bisect_in_progress)
1450                 show_bisect_in_progress(s, state, state_color);
1451 }
1452
1453 void wt_status_print(struct wt_status *s)
1454 {
1455         const char *branch_color = color(WT_STATUS_ONBRANCH, s);
1456         const char *branch_status_color = color(WT_STATUS_HEADER, s);
1457         struct wt_status_state state;
1458
1459         memset(&state, 0, sizeof(state));
1460         wt_status_get_state(&state,
1461                             s->branch && !strcmp(s->branch, "HEAD"));
1462
1463         if (s->branch) {
1464                 const char *on_what = _("On branch ");
1465                 const char *branch_name = s->branch;
1466                 if (!strcmp(branch_name, "HEAD")) {
1467                         branch_status_color = color(WT_STATUS_NOBRANCH, s);
1468                         if (state.rebase_in_progress || state.rebase_interactive_in_progress) {
1469                                 if (state.rebase_interactive_in_progress)
1470                                         on_what = _("interactive rebase in progress; onto ");
1471                                 else
1472                                         on_what = _("rebase in progress; onto ");
1473                                 branch_name = state.onto;
1474                         } else if (state.detached_from) {
1475                                 branch_name = state.detached_from;
1476                                 if (state.detached_at)
1477                                         on_what = _("HEAD detached at ");
1478                                 else
1479                                         on_what = _("HEAD detached from ");
1480                         } else {
1481                                 branch_name = "";
1482                                 on_what = _("Not currently on any branch.");
1483                         }
1484                 } else
1485                         skip_prefix(branch_name, "refs/heads/", &branch_name);
1486                 status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
1487                 status_printf_more(s, branch_status_color, "%s", on_what);
1488                 status_printf_more(s, branch_color, "%s\n", branch_name);
1489                 if (!s->is_initial)
1490                         wt_status_print_tracking(s);
1491         }
1492
1493         wt_status_print_state(s, &state);
1494         free(state.branch);
1495         free(state.onto);
1496         free(state.detached_from);
1497
1498         if (s->is_initial) {
1499                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1500                 status_printf_ln(s, color(WT_STATUS_HEADER, s), _("Initial commit"));
1501                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1502         }
1503
1504         wt_status_print_updated(s);
1505         wt_status_print_unmerged(s);
1506         wt_status_print_changed(s);
1507         if (s->submodule_summary &&
1508             (!s->ignore_submodule_arg ||
1509              strcmp(s->ignore_submodule_arg, "all"))) {
1510                 wt_status_print_submodule_summary(s, 0);  /* staged */
1511                 wt_status_print_submodule_summary(s, 1);  /* unstaged */
1512         }
1513         if (s->show_untracked_files) {
1514                 wt_status_print_other(s, &s->untracked, _("Untracked files"), "add");
1515                 if (s->show_ignored_files)
1516                         wt_status_print_other(s, &s->ignored, _("Ignored files"), "add -f");
1517                 if (advice_status_u_option && 2000 < s->untracked_in_ms) {
1518                         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
1519                         status_printf_ln(s, GIT_COLOR_NORMAL,
1520                                          _("It took %.2f seconds to enumerate untracked files. 'status -uno'\n"
1521                                            "may speed it up, but you have to be careful not to forget to add\n"
1522                                            "new files yourself (see 'git help status')."),
1523                                          s->untracked_in_ms / 1000.0);
1524                 }
1525         } else if (s->commitable)
1526                 status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
1527                         s->hints
1528                         ? _(" (use -u option to show untracked files)") : "");
1529
1530         if (s->verbose)
1531                 wt_status_print_verbose(s);
1532         if (!s->commitable) {
1533                 if (s->amend)
1534                         status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
1535                 else if (s->nowarn)
1536                         ; /* nothing */
1537                 else if (s->workdir_dirty) {
1538                         if (s->hints)
1539                                 printf(_("no changes added to commit "
1540                                          "(use \"git add\" and/or \"git commit -a\")\n"));
1541                         else
1542                                 printf(_("no changes added to commit\n"));
1543                 } else if (s->untracked.nr) {
1544                         if (s->hints)
1545                                 printf(_("nothing added to commit but untracked files "
1546                                          "present (use \"git add\" to track)\n"));
1547                         else
1548                                 printf(_("nothing added to commit but untracked files present\n"));
1549                 } else if (s->is_initial) {
1550                         if (s->hints)
1551                                 printf(_("nothing to commit (create/copy files "
1552                                          "and use \"git add\" to track)\n"));
1553                         else
1554                                 printf(_("nothing to commit\n"));
1555                 } else if (!s->show_untracked_files) {
1556                         if (s->hints)
1557                                 printf(_("nothing to commit (use -u to show untracked files)\n"));
1558                         else
1559                                 printf(_("nothing to commit\n"));
1560                 } else
1561                         printf(_("nothing to commit, working tree clean\n"));
1562         }
1563 }
1564
1565 static void wt_shortstatus_unmerged(struct string_list_item *it,
1566                            struct wt_status *s)
1567 {
1568         struct wt_status_change_data *d = it->util;
1569         const char *how = "??";
1570
1571         switch (d->stagemask) {
1572         case 1: how = "DD"; break; /* both deleted */
1573         case 2: how = "AU"; break; /* added by us */
1574         case 3: how = "UD"; break; /* deleted by them */
1575         case 4: how = "UA"; break; /* added by them */
1576         case 5: how = "DU"; break; /* deleted by us */
1577         case 6: how = "AA"; break; /* both added */
1578         case 7: how = "UU"; break; /* both modified */
1579         }
1580         color_fprintf(s->fp, color(WT_STATUS_UNMERGED, s), "%s", how);
1581         if (s->null_termination) {
1582                 fprintf(stdout, " %s%c", it->string, 0);
1583         } else {
1584                 struct strbuf onebuf = STRBUF_INIT;
1585                 const char *one;
1586                 one = quote_path(it->string, s->prefix, &onebuf);
1587                 printf(" %s\n", one);
1588                 strbuf_release(&onebuf);
1589         }
1590 }
1591
1592 static void wt_shortstatus_status(struct string_list_item *it,
1593                          struct wt_status *s)
1594 {
1595         struct wt_status_change_data *d = it->util;
1596
1597         if (d->index_status)
1598                 color_fprintf(s->fp, color(WT_STATUS_UPDATED, s), "%c", d->index_status);
1599         else
1600                 putchar(' ');
1601         if (d->worktree_status)
1602                 color_fprintf(s->fp, color(WT_STATUS_CHANGED, s), "%c", d->worktree_status);
1603         else
1604                 putchar(' ');
1605         putchar(' ');
1606         if (s->null_termination) {
1607                 fprintf(stdout, "%s%c", it->string, 0);
1608                 if (d->head_path)
1609                         fprintf(stdout, "%s%c", d->head_path, 0);
1610         } else {
1611                 struct strbuf onebuf = STRBUF_INIT;
1612                 const char *one;
1613                 if (d->head_path) {
1614                         one = quote_path(d->head_path, s->prefix, &onebuf);
1615                         if (*one != '"' && strchr(one, ' ') != NULL) {
1616                                 putchar('"');
1617                                 strbuf_addch(&onebuf, '"');
1618                                 one = onebuf.buf;
1619                         }
1620                         printf("%s -> ", one);
1621                         strbuf_release(&onebuf);
1622                 }
1623                 one = quote_path(it->string, s->prefix, &onebuf);
1624                 if (*one != '"' && strchr(one, ' ') != NULL) {
1625                         putchar('"');
1626                         strbuf_addch(&onebuf, '"');
1627                         one = onebuf.buf;
1628                 }
1629                 printf("%s\n", one);
1630                 strbuf_release(&onebuf);
1631         }
1632 }
1633
1634 static void wt_shortstatus_other(struct string_list_item *it,
1635                                  struct wt_status *s, const char *sign)
1636 {
1637         if (s->null_termination) {
1638                 fprintf(stdout, "%s %s%c", sign, it->string, 0);
1639         } else {
1640                 struct strbuf onebuf = STRBUF_INIT;
1641                 const char *one;
1642                 one = quote_path(it->string, s->prefix, &onebuf);
1643                 color_fprintf(s->fp, color(WT_STATUS_UNTRACKED, s), "%s", sign);
1644                 printf(" %s\n", one);
1645                 strbuf_release(&onebuf);
1646         }
1647 }
1648
1649 static void wt_shortstatus_print_tracking(struct wt_status *s)
1650 {
1651         struct branch *branch;
1652         const char *header_color = color(WT_STATUS_HEADER, s);
1653         const char *branch_color_local = color(WT_STATUS_LOCAL_BRANCH, s);
1654         const char *branch_color_remote = color(WT_STATUS_REMOTE_BRANCH, s);
1655
1656         const char *base;
1657         const char *branch_name;
1658         int num_ours, num_theirs;
1659         int upstream_is_gone = 0;
1660
1661         color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "## ");
1662
1663         if (!s->branch)
1664                 return;
1665         branch_name = s->branch;
1666
1667         if (s->is_initial)
1668                 color_fprintf(s->fp, header_color, _("Initial commit on "));
1669
1670         if (!strcmp(s->branch, "HEAD")) {
1671                 color_fprintf(s->fp, color(WT_STATUS_NOBRANCH, s), "%s",
1672                               _("HEAD (no branch)"));
1673                 goto conclude;
1674         }
1675
1676         skip_prefix(branch_name, "refs/heads/", &branch_name);
1677
1678         branch = branch_get(branch_name);
1679
1680         color_fprintf(s->fp, branch_color_local, "%s", branch_name);
1681
1682         if (stat_tracking_info(branch, &num_ours, &num_theirs, &base) < 0) {
1683                 if (!base)
1684                         goto conclude;
1685
1686                 upstream_is_gone = 1;
1687         }
1688
1689         base = shorten_unambiguous_ref(base, 0);
1690         color_fprintf(s->fp, header_color, "...");
1691         color_fprintf(s->fp, branch_color_remote, "%s", base);
1692         free((char *)base);
1693
1694         if (!upstream_is_gone && !num_ours && !num_theirs)
1695                 goto conclude;
1696
1697 #define LABEL(string) (s->no_gettext ? (string) : _(string))
1698
1699         color_fprintf(s->fp, header_color, " [");
1700         if (upstream_is_gone) {
1701                 color_fprintf(s->fp, header_color, LABEL(N_("gone")));
1702         } else if (!num_ours) {
1703                 color_fprintf(s->fp, header_color, LABEL(N_("behind ")));
1704                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1705         } else if (!num_theirs) {
1706                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1707                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1708         } else {
1709                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1710                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1711                 color_fprintf(s->fp, header_color, ", %s", LABEL(N_("behind ")));
1712                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1713         }
1714
1715         color_fprintf(s->fp, header_color, "]");
1716  conclude:
1717         fputc(s->null_termination ? '\0' : '\n', s->fp);
1718 }
1719
1720 void wt_shortstatus_print(struct wt_status *s)
1721 {
1722         int i;
1723
1724         if (s->show_branch)
1725                 wt_shortstatus_print_tracking(s);
1726
1727         for (i = 0; i < s->change.nr; i++) {
1728                 struct wt_status_change_data *d;
1729                 struct string_list_item *it;
1730
1731                 it = &(s->change.items[i]);
1732                 d = it->util;
1733                 if (d->stagemask)
1734                         wt_shortstatus_unmerged(it, s);
1735                 else
1736                         wt_shortstatus_status(it, s);
1737         }
1738         for (i = 0; i < s->untracked.nr; i++) {
1739                 struct string_list_item *it;
1740
1741                 it = &(s->untracked.items[i]);
1742                 wt_shortstatus_other(it, s, "??");
1743         }
1744         for (i = 0; i < s->ignored.nr; i++) {
1745                 struct string_list_item *it;
1746
1747                 it = &(s->ignored.items[i]);
1748                 wt_shortstatus_other(it, s, "!!");
1749         }
1750 }
1751
1752 void wt_porcelain_print(struct wt_status *s)
1753 {
1754         s->use_color = 0;
1755         s->relative_paths = 0;
1756         s->prefix = NULL;
1757         s->no_gettext = 1;
1758         wt_shortstatus_print(s);
1759 }