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