Merge branch 'ew/markdown-url-in-readme'
[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 #include "lockfile.h"
20
21 static const char cut_line[] =
22 "------------------------ >8 ------------------------\n";
23
24 static char default_wt_status_colors[][COLOR_MAXLEN] = {
25         GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
26         GIT_COLOR_GREEN,  /* WT_STATUS_UPDATED */
27         GIT_COLOR_RED,    /* WT_STATUS_CHANGED */
28         GIT_COLOR_RED,    /* WT_STATUS_UNTRACKED */
29         GIT_COLOR_RED,    /* WT_STATUS_NOBRANCH */
30         GIT_COLOR_RED,    /* WT_STATUS_UNMERGED */
31         GIT_COLOR_GREEN,  /* WT_STATUS_LOCAL_BRANCH */
32         GIT_COLOR_RED,    /* WT_STATUS_REMOTE_BRANCH */
33         GIT_COLOR_NIL,    /* WT_STATUS_ONBRANCH */
34 };
35
36 static const char *color(int slot, struct wt_status *s)
37 {
38         const char *c = "";
39         if (want_color(s->use_color))
40                 c = s->color_palette[slot];
41         if (slot == WT_STATUS_ONBRANCH && color_is_nil(c))
42                 c = s->color_palette[WT_STATUS_HEADER];
43         return c;
44 }
45
46 static void status_vprintf(struct wt_status *s, int at_bol, const char *color,
47                 const char *fmt, va_list ap, const char *trail)
48 {
49         struct strbuf sb = STRBUF_INIT;
50         struct strbuf linebuf = STRBUF_INIT;
51         const char *line, *eol;
52
53         strbuf_vaddf(&sb, fmt, ap);
54         if (!sb.len) {
55                 if (s->display_comment_prefix) {
56                         strbuf_addch(&sb, comment_line_char);
57                         if (!trail)
58                                 strbuf_addch(&sb, ' ');
59                 }
60                 color_print_strbuf(s->fp, color, &sb);
61                 if (trail)
62                         fprintf(s->fp, "%s", trail);
63                 strbuf_release(&sb);
64                 return;
65         }
66         for (line = sb.buf; *line; line = eol + 1) {
67                 eol = strchr(line, '\n');
68
69                 strbuf_reset(&linebuf);
70                 if (at_bol && s->display_comment_prefix) {
71                         strbuf_addch(&linebuf, comment_line_char);
72                         if (*line != '\n' && *line != '\t')
73                                 strbuf_addch(&linebuf, ' ');
74                 }
75                 if (eol)
76                         strbuf_add(&linebuf, line, eol - line);
77                 else
78                         strbuf_addstr(&linebuf, line);
79                 color_print_strbuf(s->fp, color, &linebuf);
80                 if (eol)
81                         fprintf(s->fp, "\n");
82                 else
83                         break;
84                 at_bol = 1;
85         }
86         if (trail)
87                 fprintf(s->fp, "%s", trail);
88         strbuf_release(&linebuf);
89         strbuf_release(&sb);
90 }
91
92 void status_printf_ln(struct wt_status *s, const char *color,
93                         const char *fmt, ...)
94 {
95         va_list ap;
96
97         va_start(ap, fmt);
98         status_vprintf(s, 1, color, fmt, ap, "\n");
99         va_end(ap);
100 }
101
102 void status_printf(struct wt_status *s, const char *color,
103                         const char *fmt, ...)
104 {
105         va_list ap;
106
107         va_start(ap, fmt);
108         status_vprintf(s, 1, color, fmt, ap, NULL);
109         va_end(ap);
110 }
111
112 static void status_printf_more(struct wt_status *s, const char *color,
113                                const char *fmt, ...)
114 {
115         va_list ap;
116
117         va_start(ap, fmt);
118         status_vprintf(s, 0, color, fmt, ap, NULL);
119         va_end(ap);
120 }
121
122 void wt_status_prepare(struct wt_status *s)
123 {
124         unsigned char sha1[20];
125
126         memset(s, 0, sizeof(*s));
127         memcpy(s->color_palette, default_wt_status_colors,
128                sizeof(default_wt_status_colors));
129         s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
130         s->use_color = -1;
131         s->relative_paths = 1;
132         s->branch = resolve_refdup("HEAD", 0, sha1, NULL);
133         s->reference = "HEAD";
134         s->fp = stdout;
135         s->index_file = get_index_file();
136         s->change.strdup_strings = 1;
137         s->untracked.strdup_strings = 1;
138         s->ignored.strdup_strings = 1;
139         s->show_branch = -1;  /* unspecified */
140         s->display_comment_prefix = 0;
141 }
142
143 static void wt_longstatus_print_unmerged_header(struct wt_status *s)
144 {
145         int i;
146         int del_mod_conflict = 0;
147         int both_deleted = 0;
148         int not_deleted = 0;
149         const char *c = color(WT_STATUS_HEADER, s);
150
151         status_printf_ln(s, c, _("Unmerged paths:"));
152
153         for (i = 0; i < s->change.nr; i++) {
154                 struct string_list_item *it = &(s->change.items[i]);
155                 struct wt_status_change_data *d = it->util;
156
157                 switch (d->stagemask) {
158                 case 0:
159                         break;
160                 case 1:
161                         both_deleted = 1;
162                         break;
163                 case 3:
164                 case 5:
165                         del_mod_conflict = 1;
166                         break;
167                 default:
168                         not_deleted = 1;
169                         break;
170                 }
171         }
172
173         if (!s->hints)
174                 return;
175         if (s->whence != FROM_COMMIT)
176                 ;
177         else if (!s->is_initial)
178                 status_printf_ln(s, c, _("  (use \"git reset %s <file>...\" to unstage)"), s->reference);
179         else
180                 status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
181
182         if (!both_deleted) {
183                 if (!del_mod_conflict)
184                         status_printf_ln(s, c, _("  (use \"git add <file>...\" to mark resolution)"));
185                 else
186                         status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
187         } else if (!del_mod_conflict && !not_deleted) {
188                 status_printf_ln(s, c, _("  (use \"git rm <file>...\" to mark resolution)"));
189         } else {
190                 status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
191         }
192         status_printf_ln(s, c, "%s", "");
193 }
194
195 static void wt_longstatus_print_cached_header(struct wt_status *s)
196 {
197         const char *c = color(WT_STATUS_HEADER, s);
198
199         status_printf_ln(s, c, _("Changes to be committed:"));
200         if (!s->hints)
201                 return;
202         if (s->whence != FROM_COMMIT)
203                 ; /* NEEDSWORK: use "git reset --unresolve"??? */
204         else if (!s->is_initial)
205                 status_printf_ln(s, c, _("  (use \"git reset %s <file>...\" to unstage)"), s->reference);
206         else
207                 status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
208         status_printf_ln(s, c, "%s", "");
209 }
210
211 static void wt_longstatus_print_dirty_header(struct wt_status *s,
212                                              int has_deleted,
213                                              int has_dirty_submodules)
214 {
215         const char *c = color(WT_STATUS_HEADER, s);
216
217         status_printf_ln(s, c, _("Changes not staged for commit:"));
218         if (!s->hints)
219                 return;
220         if (!has_deleted)
221                 status_printf_ln(s, c, _("  (use \"git add <file>...\" to update what will be committed)"));
222         else
223                 status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" to update what will be committed)"));
224         status_printf_ln(s, c, _("  (use \"git checkout -- <file>...\" to discard changes in working directory)"));
225         if (has_dirty_submodules)
226                 status_printf_ln(s, c, _("  (commit or discard the untracked or modified content in submodules)"));
227         status_printf_ln(s, c, "%s", "");
228 }
229
230 static void wt_longstatus_print_other_header(struct wt_status *s,
231                                              const char *what,
232                                              const char *how)
233 {
234         const char *c = color(WT_STATUS_HEADER, s);
235         status_printf_ln(s, c, "%s:", what);
236         if (!s->hints)
237                 return;
238         status_printf_ln(s, c, _("  (use \"git %s <file>...\" to include in what will be committed)"), how);
239         status_printf_ln(s, c, "%s", "");
240 }
241
242 static void wt_longstatus_print_trailer(struct wt_status *s)
243 {
244         status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
245 }
246
247 #define quote_path quote_path_relative
248
249 static const char *wt_status_unmerged_status_string(int stagemask)
250 {
251         switch (stagemask) {
252         case 1:
253                 return _("both deleted:");
254         case 2:
255                 return _("added by us:");
256         case 3:
257                 return _("deleted by them:");
258         case 4:
259                 return _("added by them:");
260         case 5:
261                 return _("deleted by us:");
262         case 6:
263                 return _("both added:");
264         case 7:
265                 return _("both modified:");
266         default:
267                 die("BUG: unhandled unmerged status %x", stagemask);
268         }
269 }
270
271 static const char *wt_status_diff_status_string(int status)
272 {
273         switch (status) {
274         case DIFF_STATUS_ADDED:
275                 return _("new file:");
276         case DIFF_STATUS_COPIED:
277                 return _("copied:");
278         case DIFF_STATUS_DELETED:
279                 return _("deleted:");
280         case DIFF_STATUS_MODIFIED:
281                 return _("modified:");
282         case DIFF_STATUS_RENAMED:
283                 return _("renamed:");
284         case DIFF_STATUS_TYPE_CHANGED:
285                 return _("typechange:");
286         case DIFF_STATUS_UNKNOWN:
287                 return _("unknown:");
288         case DIFF_STATUS_UNMERGED:
289                 return _("unmerged:");
290         default:
291                 return NULL;
292         }
293 }
294
295 static int maxwidth(const char *(*label)(int), int minval, int maxval)
296 {
297         int result = 0, i;
298
299         for (i = minval; i <= maxval; i++) {
300                 const char *s = label(i);
301                 int len = s ? utf8_strwidth(s) : 0;
302                 if (len > result)
303                         result = len;
304         }
305         return result;
306 }
307
308 static void wt_longstatus_print_unmerged_data(struct wt_status *s,
309                                               struct string_list_item *it)
310 {
311         const char *c = color(WT_STATUS_UNMERGED, s);
312         struct wt_status_change_data *d = it->util;
313         struct strbuf onebuf = STRBUF_INIT;
314         static char *padding;
315         static int label_width;
316         const char *one, *how;
317         int len;
318
319         if (!padding) {
320                 label_width = maxwidth(wt_status_unmerged_status_string, 1, 7);
321                 label_width += strlen(" ");
322                 padding = xmallocz(label_width);
323                 memset(padding, ' ', label_width);
324         }
325
326         one = quote_path(it->string, s->prefix, &onebuf);
327         status_printf(s, color(WT_STATUS_HEADER, s), "\t");
328
329         how = wt_status_unmerged_status_string(d->stagemask);
330         len = label_width - utf8_strwidth(how);
331         status_printf_more(s, c, "%s%.*s%s\n", how, len, padding, one);
332         strbuf_release(&onebuf);
333 }
334
335 static void wt_longstatus_print_change_data(struct wt_status *s,
336                                             int change_type,
337                                             struct string_list_item *it)
338 {
339         struct wt_status_change_data *d = it->util;
340         const char *c = color(change_type, s);
341         int status;
342         char *one_name;
343         char *two_name;
344         const char *one, *two;
345         struct strbuf onebuf = STRBUF_INIT, twobuf = STRBUF_INIT;
346         struct strbuf extra = STRBUF_INIT;
347         static char *padding;
348         static int label_width;
349         const char *what;
350         int len;
351
352         if (!padding) {
353                 /* If DIFF_STATUS_* uses outside the range [A..Z], we're in trouble */
354                 label_width = maxwidth(wt_status_diff_status_string, 'A', 'Z');
355                 label_width += strlen(" ");
356                 padding = xmallocz(label_width);
357                 memset(padding, ' ', label_width);
358         }
359
360         one_name = two_name = it->string;
361         switch (change_type) {
362         case WT_STATUS_UPDATED:
363                 status = d->index_status;
364                 if (d->head_path)
365                         one_name = d->head_path;
366                 break;
367         case WT_STATUS_CHANGED:
368                 if (d->new_submodule_commits || d->dirty_submodule) {
369                         strbuf_addstr(&extra, " (");
370                         if (d->new_submodule_commits)
371                                 strbuf_addstr(&extra, _("new commits, "));
372                         if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
373                                 strbuf_addstr(&extra, _("modified content, "));
374                         if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
375                                 strbuf_addstr(&extra, _("untracked content, "));
376                         strbuf_setlen(&extra, extra.len - 2);
377                         strbuf_addch(&extra, ')');
378                 }
379                 status = d->worktree_status;
380                 break;
381         default:
382                 die("BUG: unhandled change_type %d in wt_longstatus_print_change_data",
383                     change_type);
384         }
385
386         one = quote_path(one_name, s->prefix, &onebuf);
387         two = quote_path(two_name, s->prefix, &twobuf);
388
389         status_printf(s, color(WT_STATUS_HEADER, s), "\t");
390         what = wt_status_diff_status_string(status);
391         if (!what)
392                 die("BUG: unhandled diff status %c", status);
393         len = label_width - utf8_strwidth(what);
394         assert(len >= 0);
395         if (status == DIFF_STATUS_COPIED || status == DIFF_STATUS_RENAMED)
396                 status_printf_more(s, c, "%s%.*s%s -> %s",
397                                    what, len, padding, one, two);
398         else
399                 status_printf_more(s, c, "%s%.*s%s",
400                                    what, len, padding, one);
401         if (extra.len) {
402                 status_printf_more(s, color(WT_STATUS_HEADER, s), "%s", extra.buf);
403                 strbuf_release(&extra);
404         }
405         status_printf_more(s, GIT_COLOR_NORMAL, "\n");
406         strbuf_release(&onebuf);
407         strbuf_release(&twobuf);
408 }
409
410 static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
411                                          struct diff_options *options,
412                                          void *data)
413 {
414         struct wt_status *s = data;
415         int i;
416
417         if (!q->nr)
418                 return;
419         s->workdir_dirty = 1;
420         for (i = 0; i < q->nr; i++) {
421                 struct diff_filepair *p;
422                 struct string_list_item *it;
423                 struct wt_status_change_data *d;
424
425                 p = q->queue[i];
426                 it = string_list_insert(&s->change, p->one->path);
427                 d = it->util;
428                 if (!d) {
429                         d = xcalloc(1, sizeof(*d));
430                         it->util = d;
431                 }
432                 if (!d->worktree_status)
433                         d->worktree_status = p->status;
434                 d->dirty_submodule = p->two->dirty_submodule;
435                 if (S_ISGITLINK(p->two->mode))
436                         d->new_submodule_commits = !!oidcmp(&p->one->oid,
437                                                             &p->two->oid);
438
439                 switch (p->status) {
440                 case DIFF_STATUS_ADDED:
441                         d->mode_worktree = p->two->mode;
442                         break;
443
444                 case DIFF_STATUS_DELETED:
445                         d->mode_index = p->one->mode;
446                         oidcpy(&d->oid_index, &p->one->oid);
447                         /* mode_worktree is zero for a delete. */
448                         break;
449
450                 case DIFF_STATUS_MODIFIED:
451                 case DIFF_STATUS_TYPE_CHANGED:
452                 case DIFF_STATUS_UNMERGED:
453                         d->mode_index = p->one->mode;
454                         d->mode_worktree = p->two->mode;
455                         oidcpy(&d->oid_index, &p->one->oid);
456                         break;
457
458                 case DIFF_STATUS_UNKNOWN:
459                         die("BUG: worktree status unknown???");
460                         break;
461                 }
462
463         }
464 }
465
466 static int unmerged_mask(const char *path)
467 {
468         int pos, mask;
469         const struct cache_entry *ce;
470
471         pos = cache_name_pos(path, strlen(path));
472         if (0 <= pos)
473                 return 0;
474
475         mask = 0;
476         pos = -pos-1;
477         while (pos < active_nr) {
478                 ce = active_cache[pos++];
479                 if (strcmp(ce->name, path) || !ce_stage(ce))
480                         break;
481                 mask |= (1 << (ce_stage(ce) - 1));
482         }
483         return mask;
484 }
485
486 static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
487                                          struct diff_options *options,
488                                          void *data)
489 {
490         struct wt_status *s = data;
491         int i;
492
493         for (i = 0; i < q->nr; i++) {
494                 struct diff_filepair *p;
495                 struct string_list_item *it;
496                 struct wt_status_change_data *d;
497
498                 p = q->queue[i];
499                 it = string_list_insert(&s->change, p->two->path);
500                 d = it->util;
501                 if (!d) {
502                         d = xcalloc(1, sizeof(*d));
503                         it->util = d;
504                 }
505                 if (!d->index_status)
506                         d->index_status = p->status;
507                 switch (p->status) {
508                 case DIFF_STATUS_ADDED:
509                         /* Leave {mode,oid}_head zero for an add. */
510                         d->mode_index = p->two->mode;
511                         oidcpy(&d->oid_index, &p->two->oid);
512                         break;
513                 case DIFF_STATUS_DELETED:
514                         d->mode_head = p->one->mode;
515                         oidcpy(&d->oid_head, &p->one->oid);
516                         /* Leave {mode,oid}_index zero for a delete. */
517                         break;
518
519                 case DIFF_STATUS_COPIED:
520                 case DIFF_STATUS_RENAMED:
521                         d->head_path = xstrdup(p->one->path);
522                         d->score = p->score * 100 / MAX_SCORE;
523                         /* fallthru */
524                 case DIFF_STATUS_MODIFIED:
525                 case DIFF_STATUS_TYPE_CHANGED:
526                         d->mode_head = p->one->mode;
527                         d->mode_index = p->two->mode;
528                         oidcpy(&d->oid_head, &p->one->oid);
529                         oidcpy(&d->oid_index, &p->two->oid);
530                         break;
531                 case DIFF_STATUS_UNMERGED:
532                         d->stagemask = unmerged_mask(p->two->path);
533                         /*
534                          * Don't bother setting {mode,oid}_{head,index} since the print
535                          * code will output the stage values directly and not use the
536                          * values in these fields.
537                          */
538                         break;
539                 }
540         }
541 }
542
543 static void wt_status_collect_changes_worktree(struct wt_status *s)
544 {
545         struct rev_info rev;
546
547         init_revisions(&rev, NULL);
548         setup_revisions(0, NULL, &rev, NULL);
549         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
550         DIFF_OPT_SET(&rev.diffopt, DIRTY_SUBMODULES);
551         rev.diffopt.ita_invisible_in_index = 1;
552         if (!s->show_untracked_files)
553                 DIFF_OPT_SET(&rev.diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
554         if (s->ignore_submodule_arg) {
555                 DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
556                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
557         }
558         rev.diffopt.format_callback = wt_status_collect_changed_cb;
559         rev.diffopt.format_callback_data = s;
560         copy_pathspec(&rev.prune_data, &s->pathspec);
561         run_diff_files(&rev, 0);
562 }
563
564 static void wt_status_collect_changes_index(struct wt_status *s)
565 {
566         struct rev_info rev;
567         struct setup_revision_opt opt;
568
569         init_revisions(&rev, NULL);
570         memset(&opt, 0, sizeof(opt));
571         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
572         setup_revisions(0, NULL, &rev, &opt);
573
574         DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
575         rev.diffopt.ita_invisible_in_index = 1;
576         if (s->ignore_submodule_arg) {
577                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
578         } else {
579                 /*
580                  * Unless the user did explicitly request a submodule ignore
581                  * mode by passing a command line option we do not ignore any
582                  * changed submodule SHA-1s when comparing index and HEAD, no
583                  * matter what is configured. Otherwise the user won't be
584                  * shown any submodules she manually added (and which are
585                  * staged to be committed), which would be really confusing.
586                  */
587                 handle_ignore_submodules_arg(&rev.diffopt, "dirty");
588         }
589
590         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
591         rev.diffopt.format_callback = wt_status_collect_updated_cb;
592         rev.diffopt.format_callback_data = s;
593         rev.diffopt.detect_rename = 1;
594         rev.diffopt.rename_limit = 200;
595         rev.diffopt.break_opt = 0;
596         copy_pathspec(&rev.prune_data, &s->pathspec);
597         run_diff_index(&rev, 1);
598 }
599
600 static void wt_status_collect_changes_initial(struct wt_status *s)
601 {
602         int i;
603
604         for (i = 0; i < active_nr; i++) {
605                 struct string_list_item *it;
606                 struct wt_status_change_data *d;
607                 const struct cache_entry *ce = active_cache[i];
608
609                 if (!ce_path_match(ce, &s->pathspec, NULL))
610                         continue;
611                 if (ce_intent_to_add(ce))
612                         continue;
613                 it = string_list_insert(&s->change, ce->name);
614                 d = it->util;
615                 if (!d) {
616                         d = xcalloc(1, sizeof(*d));
617                         it->util = d;
618                 }
619                 if (ce_stage(ce)) {
620                         d->index_status = DIFF_STATUS_UNMERGED;
621                         d->stagemask |= (1 << (ce_stage(ce) - 1));
622                         /*
623                          * Don't bother setting {mode,oid}_{head,index} since the print
624                          * code will output the stage values directly and not use the
625                          * values in these fields.
626                          */
627                 } else {
628                         d->index_status = DIFF_STATUS_ADDED;
629                         /* Leave {mode,oid}_head zero for adds. */
630                         d->mode_index = ce->ce_mode;
631                         oidcpy(&d->oid_index, &ce->oid);
632                 }
633         }
634 }
635
636 static void wt_status_collect_untracked(struct wt_status *s)
637 {
638         int i;
639         struct dir_struct dir;
640         uint64_t t_begin = getnanotime();
641
642         if (!s->show_untracked_files)
643                 return;
644
645         memset(&dir, 0, sizeof(dir));
646         if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
647                 dir.flags |=
648                         DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
649         if (s->show_ignored_files)
650                 dir.flags |= DIR_SHOW_IGNORED_TOO;
651         else
652                 dir.untracked = the_index.untracked;
653         setup_standard_excludes(&dir);
654
655         fill_directory(&dir, &s->pathspec);
656
657         for (i = 0; i < dir.nr; i++) {
658                 struct dir_entry *ent = dir.entries[i];
659                 if (cache_name_is_other(ent->name, ent->len) &&
660                     dir_path_match(ent, &s->pathspec, 0, NULL))
661                         string_list_insert(&s->untracked, ent->name);
662                 free(ent);
663         }
664
665         for (i = 0; i < dir.ignored_nr; i++) {
666                 struct dir_entry *ent = dir.ignored[i];
667                 if (cache_name_is_other(ent->name, ent->len) &&
668                     dir_path_match(ent, &s->pathspec, 0, NULL))
669                         string_list_insert(&s->ignored, ent->name);
670                 free(ent);
671         }
672
673         free(dir.entries);
674         free(dir.ignored);
675         clear_directory(&dir);
676
677         if (advice_status_u_option)
678                 s->untracked_in_ms = (getnanotime() - t_begin) / 1000000;
679 }
680
681 void wt_status_collect(struct wt_status *s)
682 {
683         wt_status_collect_changes_worktree(s);
684
685         if (s->is_initial)
686                 wt_status_collect_changes_initial(s);
687         else
688                 wt_status_collect_changes_index(s);
689         wt_status_collect_untracked(s);
690 }
691
692 static void wt_longstatus_print_unmerged(struct wt_status *s)
693 {
694         int shown_header = 0;
695         int i;
696
697         for (i = 0; i < s->change.nr; i++) {
698                 struct wt_status_change_data *d;
699                 struct string_list_item *it;
700                 it = &(s->change.items[i]);
701                 d = it->util;
702                 if (!d->stagemask)
703                         continue;
704                 if (!shown_header) {
705                         wt_longstatus_print_unmerged_header(s);
706                         shown_header = 1;
707                 }
708                 wt_longstatus_print_unmerged_data(s, it);
709         }
710         if (shown_header)
711                 wt_longstatus_print_trailer(s);
712
713 }
714
715 static void wt_longstatus_print_updated(struct wt_status *s)
716 {
717         int shown_header = 0;
718         int i;
719
720         for (i = 0; i < s->change.nr; i++) {
721                 struct wt_status_change_data *d;
722                 struct string_list_item *it;
723                 it = &(s->change.items[i]);
724                 d = it->util;
725                 if (!d->index_status ||
726                     d->index_status == DIFF_STATUS_UNMERGED)
727                         continue;
728                 if (!shown_header) {
729                         wt_longstatus_print_cached_header(s);
730                         s->commitable = 1;
731                         shown_header = 1;
732                 }
733                 wt_longstatus_print_change_data(s, WT_STATUS_UPDATED, it);
734         }
735         if (shown_header)
736                 wt_longstatus_print_trailer(s);
737 }
738
739 /*
740  * -1 : has delete
741  *  0 : no change
742  *  1 : some change but no delete
743  */
744 static int wt_status_check_worktree_changes(struct wt_status *s,
745                                              int *dirty_submodules)
746 {
747         int i;
748         int changes = 0;
749
750         *dirty_submodules = 0;
751
752         for (i = 0; i < s->change.nr; i++) {
753                 struct wt_status_change_data *d;
754                 d = s->change.items[i].util;
755                 if (!d->worktree_status ||
756                     d->worktree_status == DIFF_STATUS_UNMERGED)
757                         continue;
758                 if (!changes)
759                         changes = 1;
760                 if (d->dirty_submodule)
761                         *dirty_submodules = 1;
762                 if (d->worktree_status == DIFF_STATUS_DELETED)
763                         changes = -1;
764         }
765         return changes;
766 }
767
768 static void wt_longstatus_print_changed(struct wt_status *s)
769 {
770         int i, dirty_submodules;
771         int worktree_changes = wt_status_check_worktree_changes(s, &dirty_submodules);
772
773         if (!worktree_changes)
774                 return;
775
776         wt_longstatus_print_dirty_header(s, worktree_changes < 0, dirty_submodules);
777
778         for (i = 0; i < s->change.nr; i++) {
779                 struct wt_status_change_data *d;
780                 struct string_list_item *it;
781                 it = &(s->change.items[i]);
782                 d = it->util;
783                 if (!d->worktree_status ||
784                     d->worktree_status == DIFF_STATUS_UNMERGED)
785                         continue;
786                 wt_longstatus_print_change_data(s, WT_STATUS_CHANGED, it);
787         }
788         wt_longstatus_print_trailer(s);
789 }
790
791 static void wt_longstatus_print_submodule_summary(struct wt_status *s, int uncommitted)
792 {
793         struct child_process sm_summary = CHILD_PROCESS_INIT;
794         struct strbuf cmd_stdout = STRBUF_INIT;
795         struct strbuf summary = STRBUF_INIT;
796         char *summary_content;
797
798         argv_array_pushf(&sm_summary.env_array, "GIT_INDEX_FILE=%s",
799                          s->index_file);
800
801         argv_array_push(&sm_summary.args, "submodule");
802         argv_array_push(&sm_summary.args, "summary");
803         argv_array_push(&sm_summary.args, uncommitted ? "--files" : "--cached");
804         argv_array_push(&sm_summary.args, "--for-status");
805         argv_array_push(&sm_summary.args, "--summary-limit");
806         argv_array_pushf(&sm_summary.args, "%d", s->submodule_summary);
807         if (!uncommitted)
808                 argv_array_push(&sm_summary.args, s->amend ? "HEAD^" : "HEAD");
809
810         sm_summary.git_cmd = 1;
811         sm_summary.no_stdin = 1;
812
813         capture_command(&sm_summary, &cmd_stdout, 1024);
814
815         /* prepend header, only if there's an actual output */
816         if (cmd_stdout.len) {
817                 if (uncommitted)
818                         strbuf_addstr(&summary, _("Submodules changed but not updated:"));
819                 else
820                         strbuf_addstr(&summary, _("Submodule changes to be committed:"));
821                 strbuf_addstr(&summary, "\n\n");
822         }
823         strbuf_addbuf(&summary, &cmd_stdout);
824         strbuf_release(&cmd_stdout);
825
826         if (s->display_comment_prefix) {
827                 size_t len;
828                 summary_content = strbuf_detach(&summary, &len);
829                 strbuf_add_commented_lines(&summary, summary_content, len);
830                 free(summary_content);
831         }
832
833         fputs(summary.buf, s->fp);
834         strbuf_release(&summary);
835 }
836
837 static void wt_longstatus_print_other(struct wt_status *s,
838                                       struct string_list *l,
839                                       const char *what,
840                                       const char *how)
841 {
842         int i;
843         struct strbuf buf = STRBUF_INIT;
844         static struct string_list output = STRING_LIST_INIT_DUP;
845         struct column_options copts;
846
847         if (!l->nr)
848                 return;
849
850         wt_longstatus_print_other_header(s, what, how);
851
852         for (i = 0; i < l->nr; i++) {
853                 struct string_list_item *it;
854                 const char *path;
855                 it = &(l->items[i]);
856                 path = quote_path(it->string, s->prefix, &buf);
857                 if (column_active(s->colopts)) {
858                         string_list_append(&output, path);
859                         continue;
860                 }
861                 status_printf(s, color(WT_STATUS_HEADER, s), "\t");
862                 status_printf_more(s, color(WT_STATUS_UNTRACKED, s),
863                                    "%s\n", path);
864         }
865
866         strbuf_release(&buf);
867         if (!column_active(s->colopts))
868                 goto conclude;
869
870         strbuf_addf(&buf, "%s%s\t%s",
871                     color(WT_STATUS_HEADER, s),
872                     s->display_comment_prefix ? "#" : "",
873                     color(WT_STATUS_UNTRACKED, s));
874         memset(&copts, 0, sizeof(copts));
875         copts.padding = 1;
876         copts.indent = buf.buf;
877         if (want_color(s->use_color))
878                 copts.nl = GIT_COLOR_RESET "\n";
879         print_columns(&output, s->colopts, &copts);
880         string_list_clear(&output, 0);
881         strbuf_release(&buf);
882 conclude:
883         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
884 }
885
886 void wt_status_truncate_message_at_cut_line(struct strbuf *buf)
887 {
888         const char *p;
889         struct strbuf pattern = STRBUF_INIT;
890
891         strbuf_addf(&pattern, "\n%c %s", comment_line_char, cut_line);
892         if (starts_with(buf->buf, pattern.buf + 1))
893                 strbuf_setlen(buf, 0);
894         else if ((p = strstr(buf->buf, pattern.buf)))
895                 strbuf_setlen(buf, p - buf->buf + 1);
896         strbuf_release(&pattern);
897 }
898
899 void wt_status_add_cut_line(FILE *fp)
900 {
901         const char *explanation = _("Do not touch the line above.\nEverything below will be removed.");
902         struct strbuf buf = STRBUF_INIT;
903
904         fprintf(fp, "%c %s", comment_line_char, cut_line);
905         strbuf_add_commented_lines(&buf, explanation, strlen(explanation));
906         fputs(buf.buf, fp);
907         strbuf_release(&buf);
908 }
909
910 static void wt_longstatus_print_verbose(struct wt_status *s)
911 {
912         struct rev_info rev;
913         struct setup_revision_opt opt;
914         int dirty_submodules;
915         const char *c = color(WT_STATUS_HEADER, s);
916
917         init_revisions(&rev, NULL);
918         DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
919         rev.diffopt.ita_invisible_in_index = 1;
920
921         memset(&opt, 0, sizeof(opt));
922         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
923         setup_revisions(0, NULL, &rev, &opt);
924
925         rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
926         rev.diffopt.detect_rename = 1;
927         rev.diffopt.file = s->fp;
928         rev.diffopt.close_file = 0;
929         /*
930          * If we're not going to stdout, then we definitely don't
931          * want color, since we are going to the commit message
932          * file (and even the "auto" setting won't work, since it
933          * will have checked isatty on stdout). But we then do want
934          * to insert the scissor line here to reliably remove the
935          * diff before committing.
936          */
937         if (s->fp != stdout) {
938                 rev.diffopt.use_color = 0;
939                 wt_status_add_cut_line(s->fp);
940         }
941         if (s->verbose > 1 && s->commitable) {
942                 /* print_updated() printed a header, so do we */
943                 if (s->fp != stdout)
944                         wt_longstatus_print_trailer(s);
945                 status_printf_ln(s, c, _("Changes to be committed:"));
946                 rev.diffopt.a_prefix = "c/";
947                 rev.diffopt.b_prefix = "i/";
948         } /* else use prefix as per user config */
949         run_diff_index(&rev, 1);
950         if (s->verbose > 1 &&
951             wt_status_check_worktree_changes(s, &dirty_submodules)) {
952                 status_printf_ln(s, c,
953                         "--------------------------------------------------");
954                 status_printf_ln(s, c, _("Changes not staged for commit:"));
955                 setup_work_tree();
956                 rev.diffopt.a_prefix = "i/";
957                 rev.diffopt.b_prefix = "w/";
958                 run_diff_files(&rev, 0);
959         }
960 }
961
962 static void wt_longstatus_print_tracking(struct wt_status *s)
963 {
964         struct strbuf sb = STRBUF_INIT;
965         const char *cp, *ep, *branch_name;
966         struct branch *branch;
967         char comment_line_string[3];
968         int i;
969
970         assert(s->branch && !s->is_initial);
971         if (!skip_prefix(s->branch, "refs/heads/", &branch_name))
972                 return;
973         branch = branch_get(branch_name);
974         if (!format_tracking_info(branch, &sb))
975                 return;
976
977         i = 0;
978         if (s->display_comment_prefix) {
979                 comment_line_string[i++] = comment_line_char;
980                 comment_line_string[i++] = ' ';
981         }
982         comment_line_string[i] = '\0';
983
984         for (cp = sb.buf; (ep = strchr(cp, '\n')) != NULL; cp = ep + 1)
985                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s),
986                                  "%s%.*s", comment_line_string,
987                                  (int)(ep - cp), cp);
988         if (s->display_comment_prefix)
989                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "%c",
990                                  comment_line_char);
991         else
992                 fputs("", s->fp);
993 }
994
995 static int has_unmerged(struct wt_status *s)
996 {
997         int i;
998
999         for (i = 0; i < s->change.nr; i++) {
1000                 struct wt_status_change_data *d;
1001                 d = s->change.items[i].util;
1002                 if (d->stagemask)
1003                         return 1;
1004         }
1005         return 0;
1006 }
1007
1008 static void show_merge_in_progress(struct wt_status *s,
1009                                 struct wt_status_state *state,
1010                                 const char *color)
1011 {
1012         if (has_unmerged(s)) {
1013                 status_printf_ln(s, color, _("You have unmerged paths."));
1014                 if (s->hints) {
1015                         status_printf_ln(s, color,
1016                                          _("  (fix conflicts and run \"git commit\")"));
1017                         status_printf_ln(s, color,
1018                                          _("  (use \"git merge --abort\" to abort the merge)"));
1019                 }
1020         } else {
1021                 s-> commitable = 1;
1022                 status_printf_ln(s, color,
1023                         _("All conflicts fixed but you are still merging."));
1024                 if (s->hints)
1025                         status_printf_ln(s, color,
1026                                 _("  (use \"git commit\" to conclude merge)"));
1027         }
1028         wt_longstatus_print_trailer(s);
1029 }
1030
1031 static void show_am_in_progress(struct wt_status *s,
1032                                 struct wt_status_state *state,
1033                                 const char *color)
1034 {
1035         status_printf_ln(s, color,
1036                 _("You are in the middle of an am session."));
1037         if (state->am_empty_patch)
1038                 status_printf_ln(s, color,
1039                         _("The current patch is empty."));
1040         if (s->hints) {
1041                 if (!state->am_empty_patch)
1042                         status_printf_ln(s, color,
1043                                 _("  (fix conflicts and then run \"git am --continue\")"));
1044                 status_printf_ln(s, color,
1045                         _("  (use \"git am --skip\" to skip this patch)"));
1046                 status_printf_ln(s, color,
1047                         _("  (use \"git am --abort\" to restore the original branch)"));
1048         }
1049         wt_longstatus_print_trailer(s);
1050 }
1051
1052 static char *read_line_from_git_path(const char *filename)
1053 {
1054         struct strbuf buf = STRBUF_INIT;
1055         FILE *fp = fopen(git_path("%s", filename), "r");
1056         if (!fp) {
1057                 strbuf_release(&buf);
1058                 return NULL;
1059         }
1060         strbuf_getline_lf(&buf, fp);
1061         if (!fclose(fp)) {
1062                 return strbuf_detach(&buf, NULL);
1063         } else {
1064                 strbuf_release(&buf);
1065                 return NULL;
1066         }
1067 }
1068
1069 static int split_commit_in_progress(struct wt_status *s)
1070 {
1071         int split_in_progress = 0;
1072         char *head = read_line_from_git_path("HEAD");
1073         char *orig_head = read_line_from_git_path("ORIG_HEAD");
1074         char *rebase_amend = read_line_from_git_path("rebase-merge/amend");
1075         char *rebase_orig_head = read_line_from_git_path("rebase-merge/orig-head");
1076
1077         if (!head || !orig_head || !rebase_amend || !rebase_orig_head ||
1078             !s->branch || strcmp(s->branch, "HEAD"))
1079                 return split_in_progress;
1080
1081         if (!strcmp(rebase_amend, rebase_orig_head)) {
1082                 if (strcmp(head, rebase_amend))
1083                         split_in_progress = 1;
1084         } else if (strcmp(orig_head, rebase_orig_head)) {
1085                 split_in_progress = 1;
1086         }
1087
1088         if (!s->amend && !s->nowarn && !s->workdir_dirty)
1089                 split_in_progress = 0;
1090
1091         free(head);
1092         free(orig_head);
1093         free(rebase_amend);
1094         free(rebase_orig_head);
1095         return split_in_progress;
1096 }
1097
1098 /*
1099  * Turn
1100  * "pick d6a2f0303e897ec257dd0e0a39a5ccb709bc2047 some message"
1101  * into
1102  * "pick d6a2f03 some message"
1103  *
1104  * The function assumes that the line does not contain useless spaces
1105  * before or after the command.
1106  */
1107 static void abbrev_sha1_in_line(struct strbuf *line)
1108 {
1109         struct strbuf **split;
1110         int i;
1111
1112         if (starts_with(line->buf, "exec ") ||
1113             starts_with(line->buf, "x "))
1114                 return;
1115
1116         split = strbuf_split_max(line, ' ', 3);
1117         if (split[0] && split[1]) {
1118                 unsigned char sha1[20];
1119
1120                 /*
1121                  * strbuf_split_max left a space. Trim it and re-add
1122                  * it after abbreviation.
1123                  */
1124                 strbuf_trim(split[1]);
1125                 if (!get_sha1(split[1]->buf, sha1)) {
1126                         strbuf_reset(split[1]);
1127                         strbuf_add_unique_abbrev(split[1], sha1,
1128                                                  DEFAULT_ABBREV);
1129                         strbuf_addch(split[1], ' ');
1130                         strbuf_reset(line);
1131                         for (i = 0; split[i]; i++)
1132                                 strbuf_addbuf(line, split[i]);
1133                 }
1134         }
1135         strbuf_list_free(split);
1136 }
1137
1138 static int read_rebase_todolist(const char *fname, struct string_list *lines)
1139 {
1140         struct strbuf line = STRBUF_INIT;
1141         FILE *f = fopen(git_path("%s", fname), "r");
1142
1143         if (!f) {
1144                 if (errno == ENOENT)
1145                         return -1;
1146                 die_errno("Could not open file %s for reading",
1147                           git_path("%s", fname));
1148         }
1149         while (!strbuf_getline_lf(&line, f)) {
1150                 if (line.len && line.buf[0] == comment_line_char)
1151                         continue;
1152                 strbuf_trim(&line);
1153                 if (!line.len)
1154                         continue;
1155                 abbrev_sha1_in_line(&line);
1156                 string_list_append(lines, line.buf);
1157         }
1158         return 0;
1159 }
1160
1161 static void show_rebase_information(struct wt_status *s,
1162                                         struct wt_status_state *state,
1163                                         const char *color)
1164 {
1165         if (state->rebase_interactive_in_progress) {
1166                 int i;
1167                 int nr_lines_to_show = 2;
1168
1169                 struct string_list have_done = STRING_LIST_INIT_DUP;
1170                 struct string_list yet_to_do = STRING_LIST_INIT_DUP;
1171
1172                 read_rebase_todolist("rebase-merge/done", &have_done);
1173                 if (read_rebase_todolist("rebase-merge/git-rebase-todo",
1174                                          &yet_to_do))
1175                         status_printf_ln(s, color,
1176                                 _("git-rebase-todo is missing."));
1177                 if (have_done.nr == 0)
1178                         status_printf_ln(s, color, _("No commands done."));
1179                 else {
1180                         status_printf_ln(s, color,
1181                                 Q_("Last command done (%d command done):",
1182                                         "Last commands done (%d commands done):",
1183                                         have_done.nr),
1184                                 have_done.nr);
1185                         for (i = (have_done.nr > nr_lines_to_show)
1186                                 ? have_done.nr - nr_lines_to_show : 0;
1187                                 i < have_done.nr;
1188                                 i++)
1189                                 status_printf_ln(s, color, "   %s", have_done.items[i].string);
1190                         if (have_done.nr > nr_lines_to_show && s->hints)
1191                                 status_printf_ln(s, color,
1192                                         _("  (see more in file %s)"), git_path("rebase-merge/done"));
1193                 }
1194
1195                 if (yet_to_do.nr == 0)
1196                         status_printf_ln(s, color,
1197                                          _("No commands remaining."));
1198                 else {
1199                         status_printf_ln(s, color,
1200                                 Q_("Next command to do (%d remaining command):",
1201                                         "Next commands to do (%d remaining commands):",
1202                                         yet_to_do.nr),
1203                                 yet_to_do.nr);
1204                         for (i = 0; i < nr_lines_to_show && i < yet_to_do.nr; i++)
1205                                 status_printf_ln(s, color, "   %s", yet_to_do.items[i].string);
1206                         if (s->hints)
1207                                 status_printf_ln(s, color,
1208                                         _("  (use \"git rebase --edit-todo\" to view and edit)"));
1209                 }
1210                 string_list_clear(&yet_to_do, 0);
1211                 string_list_clear(&have_done, 0);
1212         }
1213 }
1214
1215 static void print_rebase_state(struct wt_status *s,
1216                                 struct wt_status_state *state,
1217                                 const char *color)
1218 {
1219         if (state->branch)
1220                 status_printf_ln(s, color,
1221                                  _("You are currently rebasing branch '%s' on '%s'."),
1222                                  state->branch,
1223                                  state->onto);
1224         else
1225                 status_printf_ln(s, color,
1226                                  _("You are currently rebasing."));
1227 }
1228
1229 static void show_rebase_in_progress(struct wt_status *s,
1230                                 struct wt_status_state *state,
1231                                 const char *color)
1232 {
1233         struct stat st;
1234
1235         show_rebase_information(s, state, color);
1236         if (has_unmerged(s)) {
1237                 print_rebase_state(s, state, color);
1238                 if (s->hints) {
1239                         status_printf_ln(s, color,
1240                                 _("  (fix conflicts and then run \"git rebase --continue\")"));
1241                         status_printf_ln(s, color,
1242                                 _("  (use \"git rebase --skip\" to skip this patch)"));
1243                         status_printf_ln(s, color,
1244                                 _("  (use \"git rebase --abort\" to check out the original branch)"));
1245                 }
1246         } else if (state->rebase_in_progress || !stat(git_path_merge_msg(), &st)) {
1247                 print_rebase_state(s, state, color);
1248                 if (s->hints)
1249                         status_printf_ln(s, color,
1250                                 _("  (all conflicts fixed: run \"git rebase --continue\")"));
1251         } else if (split_commit_in_progress(s)) {
1252                 if (state->branch)
1253                         status_printf_ln(s, color,
1254                                          _("You are currently splitting a commit while rebasing branch '%s' on '%s'."),
1255                                          state->branch,
1256                                          state->onto);
1257                 else
1258                         status_printf_ln(s, color,
1259                                          _("You are currently splitting a commit during a rebase."));
1260                 if (s->hints)
1261                         status_printf_ln(s, color,
1262                                 _("  (Once your working directory is clean, run \"git rebase --continue\")"));
1263         } else {
1264                 if (state->branch)
1265                         status_printf_ln(s, color,
1266                                          _("You are currently editing a commit while rebasing branch '%s' on '%s'."),
1267                                          state->branch,
1268                                          state->onto);
1269                 else
1270                         status_printf_ln(s, color,
1271                                          _("You are currently editing a commit during a rebase."));
1272                 if (s->hints && !s->amend) {
1273                         status_printf_ln(s, color,
1274                                 _("  (use \"git commit --amend\" to amend the current commit)"));
1275                         status_printf_ln(s, color,
1276                                 _("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
1277                 }
1278         }
1279         wt_longstatus_print_trailer(s);
1280 }
1281
1282 static void show_cherry_pick_in_progress(struct wt_status *s,
1283                                         struct wt_status_state *state,
1284                                         const char *color)
1285 {
1286         status_printf_ln(s, color, _("You are currently cherry-picking commit %s."),
1287                         find_unique_abbrev(state->cherry_pick_head_sha1, DEFAULT_ABBREV));
1288         if (s->hints) {
1289                 if (has_unmerged(s))
1290                         status_printf_ln(s, color,
1291                                 _("  (fix conflicts and run \"git cherry-pick --continue\")"));
1292                 else
1293                         status_printf_ln(s, color,
1294                                 _("  (all conflicts fixed: run \"git cherry-pick --continue\")"));
1295                 status_printf_ln(s, color,
1296                         _("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
1297         }
1298         wt_longstatus_print_trailer(s);
1299 }
1300
1301 static void show_revert_in_progress(struct wt_status *s,
1302                                         struct wt_status_state *state,
1303                                         const char *color)
1304 {
1305         status_printf_ln(s, color, _("You are currently reverting commit %s."),
1306                          find_unique_abbrev(state->revert_head_sha1, DEFAULT_ABBREV));
1307         if (s->hints) {
1308                 if (has_unmerged(s))
1309                         status_printf_ln(s, color,
1310                                 _("  (fix conflicts and run \"git revert --continue\")"));
1311                 else
1312                         status_printf_ln(s, color,
1313                                 _("  (all conflicts fixed: run \"git revert --continue\")"));
1314                 status_printf_ln(s, color,
1315                         _("  (use \"git revert --abort\" to cancel the revert operation)"));
1316         }
1317         wt_longstatus_print_trailer(s);
1318 }
1319
1320 static void show_bisect_in_progress(struct wt_status *s,
1321                                 struct wt_status_state *state,
1322                                 const char *color)
1323 {
1324         if (state->branch)
1325                 status_printf_ln(s, color,
1326                                  _("You are currently bisecting, started from branch '%s'."),
1327                                  state->branch);
1328         else
1329                 status_printf_ln(s, color,
1330                                  _("You are currently bisecting."));
1331         if (s->hints)
1332                 status_printf_ln(s, color,
1333                         _("  (use \"git bisect reset\" to get back to the original branch)"));
1334         wt_longstatus_print_trailer(s);
1335 }
1336
1337 /*
1338  * Extract branch information from rebase/bisect
1339  */
1340 static char *get_branch(const struct worktree *wt, const char *path)
1341 {
1342         struct strbuf sb = STRBUF_INIT;
1343         unsigned char sha1[20];
1344         const char *branch_name;
1345
1346         if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
1347                 goto got_nothing;
1348
1349         while (sb.len && sb.buf[sb.len - 1] == '\n')
1350                 strbuf_setlen(&sb, sb.len - 1);
1351         if (!sb.len)
1352                 goto got_nothing;
1353         if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
1354                 strbuf_remove(&sb, 0, branch_name - sb.buf);
1355         else if (starts_with(sb.buf, "refs/"))
1356                 ;
1357         else if (!get_sha1_hex(sb.buf, sha1)) {
1358                 strbuf_reset(&sb);
1359                 strbuf_add_unique_abbrev(&sb, sha1, DEFAULT_ABBREV);
1360         } else if (!strcmp(sb.buf, "detached HEAD")) /* rebase */
1361                 goto got_nothing;
1362         else                    /* bisect */
1363                 ;
1364         return strbuf_detach(&sb, NULL);
1365
1366 got_nothing:
1367         strbuf_release(&sb);
1368         return NULL;
1369 }
1370
1371 struct grab_1st_switch_cbdata {
1372         struct strbuf buf;
1373         unsigned char nsha1[20];
1374 };
1375
1376 static int grab_1st_switch(unsigned char *osha1, unsigned char *nsha1,
1377                            const char *email, unsigned long timestamp, int tz,
1378                            const char *message, void *cb_data)
1379 {
1380         struct grab_1st_switch_cbdata *cb = cb_data;
1381         const char *target = NULL, *end;
1382
1383         if (!skip_prefix(message, "checkout: moving from ", &message))
1384                 return 0;
1385         target = strstr(message, " to ");
1386         if (!target)
1387                 return 0;
1388         target += strlen(" to ");
1389         strbuf_reset(&cb->buf);
1390         hashcpy(cb->nsha1, nsha1);
1391         end = strchrnul(target, '\n');
1392         strbuf_add(&cb->buf, target, end - target);
1393         if (!strcmp(cb->buf.buf, "HEAD")) {
1394                 /* HEAD is relative. Resolve it to the right reflog entry. */
1395                 strbuf_reset(&cb->buf);
1396                 strbuf_add_unique_abbrev(&cb->buf, nsha1, DEFAULT_ABBREV);
1397         }
1398         return 1;
1399 }
1400
1401 static void wt_status_get_detached_from(struct wt_status_state *state)
1402 {
1403         struct grab_1st_switch_cbdata cb;
1404         struct commit *commit;
1405         unsigned char sha1[20];
1406         char *ref = NULL;
1407
1408         strbuf_init(&cb.buf, 0);
1409         if (for_each_reflog_ent_reverse("HEAD", grab_1st_switch, &cb) <= 0) {
1410                 strbuf_release(&cb.buf);
1411                 return;
1412         }
1413
1414         if (dwim_ref(cb.buf.buf, cb.buf.len, sha1, &ref) == 1 &&
1415             /* sha1 is a commit? match without further lookup */
1416             (!hashcmp(cb.nsha1, sha1) ||
1417              /* perhaps sha1 is a tag, try to dereference to a commit */
1418              ((commit = lookup_commit_reference_gently(sha1, 1)) != NULL &&
1419               !hashcmp(cb.nsha1, commit->object.oid.hash)))) {
1420                 const char *from = ref;
1421                 if (!skip_prefix(from, "refs/tags/", &from))
1422                         skip_prefix(from, "refs/remotes/", &from);
1423                 state->detached_from = xstrdup(from);
1424         } else
1425                 state->detached_from =
1426                         xstrdup(find_unique_abbrev(cb.nsha1, DEFAULT_ABBREV));
1427         hashcpy(state->detached_sha1, cb.nsha1);
1428         state->detached_at = !get_sha1("HEAD", sha1) &&
1429                              !hashcmp(sha1, state->detached_sha1);
1430
1431         free(ref);
1432         strbuf_release(&cb.buf);
1433 }
1434
1435 int wt_status_check_rebase(const struct worktree *wt,
1436                            struct wt_status_state *state)
1437 {
1438         struct stat st;
1439
1440         if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
1441                 if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
1442                         state->am_in_progress = 1;
1443                         if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
1444                                 state->am_empty_patch = 1;
1445                 } else {
1446                         state->rebase_in_progress = 1;
1447                         state->branch = get_branch(wt, "rebase-apply/head-name");
1448                         state->onto = get_branch(wt, "rebase-apply/onto");
1449                 }
1450         } else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
1451                 if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
1452                         state->rebase_interactive_in_progress = 1;
1453                 else
1454                         state->rebase_in_progress = 1;
1455                 state->branch = get_branch(wt, "rebase-merge/head-name");
1456                 state->onto = get_branch(wt, "rebase-merge/onto");
1457         } else
1458                 return 0;
1459         return 1;
1460 }
1461
1462 int wt_status_check_bisect(const struct worktree *wt,
1463                            struct wt_status_state *state)
1464 {
1465         struct stat st;
1466
1467         if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
1468                 state->bisect_in_progress = 1;
1469                 state->branch = get_branch(wt, "BISECT_START");
1470                 return 1;
1471         }
1472         return 0;
1473 }
1474
1475 void wt_status_get_state(struct wt_status_state *state,
1476                          int get_detached_from)
1477 {
1478         struct stat st;
1479         unsigned char sha1[20];
1480
1481         if (!stat(git_path_merge_head(), &st)) {
1482                 state->merge_in_progress = 1;
1483         } else if (wt_status_check_rebase(NULL, state)) {
1484                 ;               /* all set */
1485         } else if (!stat(git_path_cherry_pick_head(), &st) &&
1486                         !get_sha1("CHERRY_PICK_HEAD", sha1)) {
1487                 state->cherry_pick_in_progress = 1;
1488                 hashcpy(state->cherry_pick_head_sha1, sha1);
1489         }
1490         wt_status_check_bisect(NULL, state);
1491         if (!stat(git_path_revert_head(), &st) &&
1492             !get_sha1("REVERT_HEAD", sha1)) {
1493                 state->revert_in_progress = 1;
1494                 hashcpy(state->revert_head_sha1, sha1);
1495         }
1496
1497         if (get_detached_from)
1498                 wt_status_get_detached_from(state);
1499 }
1500
1501 static void wt_longstatus_print_state(struct wt_status *s,
1502                                       struct wt_status_state *state)
1503 {
1504         const char *state_color = color(WT_STATUS_HEADER, s);
1505         if (state->merge_in_progress)
1506                 show_merge_in_progress(s, state, state_color);
1507         else if (state->am_in_progress)
1508                 show_am_in_progress(s, state, state_color);
1509         else if (state->rebase_in_progress || state->rebase_interactive_in_progress)
1510                 show_rebase_in_progress(s, state, state_color);
1511         else if (state->cherry_pick_in_progress)
1512                 show_cherry_pick_in_progress(s, state, state_color);
1513         else if (state->revert_in_progress)
1514                 show_revert_in_progress(s, state, state_color);
1515         if (state->bisect_in_progress)
1516                 show_bisect_in_progress(s, state, state_color);
1517 }
1518
1519 static void wt_longstatus_print(struct wt_status *s)
1520 {
1521         const char *branch_color = color(WT_STATUS_ONBRANCH, s);
1522         const char *branch_status_color = color(WT_STATUS_HEADER, s);
1523         struct wt_status_state state;
1524
1525         memset(&state, 0, sizeof(state));
1526         wt_status_get_state(&state,
1527                             s->branch && !strcmp(s->branch, "HEAD"));
1528
1529         if (s->branch) {
1530                 const char *on_what = _("On branch ");
1531                 const char *branch_name = s->branch;
1532                 if (!strcmp(branch_name, "HEAD")) {
1533                         branch_status_color = color(WT_STATUS_NOBRANCH, s);
1534                         if (state.rebase_in_progress || state.rebase_interactive_in_progress) {
1535                                 if (state.rebase_interactive_in_progress)
1536                                         on_what = _("interactive rebase in progress; onto ");
1537                                 else
1538                                         on_what = _("rebase in progress; onto ");
1539                                 branch_name = state.onto;
1540                         } else if (state.detached_from) {
1541                                 branch_name = state.detached_from;
1542                                 if (state.detached_at)
1543                                         on_what = _("HEAD detached at ");
1544                                 else
1545                                         on_what = _("HEAD detached from ");
1546                         } else {
1547                                 branch_name = "";
1548                                 on_what = _("Not currently on any branch.");
1549                         }
1550                 } else
1551                         skip_prefix(branch_name, "refs/heads/", &branch_name);
1552                 status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
1553                 status_printf_more(s, branch_status_color, "%s", on_what);
1554                 status_printf_more(s, branch_color, "%s\n", branch_name);
1555                 if (!s->is_initial)
1556                         wt_longstatus_print_tracking(s);
1557         }
1558
1559         wt_longstatus_print_state(s, &state);
1560         free(state.branch);
1561         free(state.onto);
1562         free(state.detached_from);
1563
1564         if (s->is_initial) {
1565                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1566                 status_printf_ln(s, color(WT_STATUS_HEADER, s), _("Initial commit"));
1567                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1568         }
1569
1570         wt_longstatus_print_updated(s);
1571         wt_longstatus_print_unmerged(s);
1572         wt_longstatus_print_changed(s);
1573         if (s->submodule_summary &&
1574             (!s->ignore_submodule_arg ||
1575              strcmp(s->ignore_submodule_arg, "all"))) {
1576                 wt_longstatus_print_submodule_summary(s, 0);  /* staged */
1577                 wt_longstatus_print_submodule_summary(s, 1);  /* unstaged */
1578         }
1579         if (s->show_untracked_files) {
1580                 wt_longstatus_print_other(s, &s->untracked, _("Untracked files"), "add");
1581                 if (s->show_ignored_files)
1582                         wt_longstatus_print_other(s, &s->ignored, _("Ignored files"), "add -f");
1583                 if (advice_status_u_option && 2000 < s->untracked_in_ms) {
1584                         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
1585                         status_printf_ln(s, GIT_COLOR_NORMAL,
1586                                          _("It took %.2f seconds to enumerate untracked files. 'status -uno'\n"
1587                                            "may speed it up, but you have to be careful not to forget to add\n"
1588                                            "new files yourself (see 'git help status')."),
1589                                          s->untracked_in_ms / 1000.0);
1590                 }
1591         } else if (s->commitable)
1592                 status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
1593                         s->hints
1594                         ? _(" (use -u option to show untracked files)") : "");
1595
1596         if (s->verbose)
1597                 wt_longstatus_print_verbose(s);
1598         if (!s->commitable) {
1599                 if (s->amend)
1600                         status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
1601                 else if (s->nowarn)
1602                         ; /* nothing */
1603                 else if (s->workdir_dirty) {
1604                         if (s->hints)
1605                                 printf(_("no changes added to commit "
1606                                          "(use \"git add\" and/or \"git commit -a\")\n"));
1607                         else
1608                                 printf(_("no changes added to commit\n"));
1609                 } else if (s->untracked.nr) {
1610                         if (s->hints)
1611                                 printf(_("nothing added to commit but untracked files "
1612                                          "present (use \"git add\" to track)\n"));
1613                         else
1614                                 printf(_("nothing added to commit but untracked files present\n"));
1615                 } else if (s->is_initial) {
1616                         if (s->hints)
1617                                 printf(_("nothing to commit (create/copy files "
1618                                          "and use \"git add\" to track)\n"));
1619                         else
1620                                 printf(_("nothing to commit\n"));
1621                 } else if (!s->show_untracked_files) {
1622                         if (s->hints)
1623                                 printf(_("nothing to commit (use -u to show untracked files)\n"));
1624                         else
1625                                 printf(_("nothing to commit\n"));
1626                 } else
1627                         printf(_("nothing to commit, working tree clean\n"));
1628         }
1629 }
1630
1631 static void wt_shortstatus_unmerged(struct string_list_item *it,
1632                            struct wt_status *s)
1633 {
1634         struct wt_status_change_data *d = it->util;
1635         const char *how = "??";
1636
1637         switch (d->stagemask) {
1638         case 1: how = "DD"; break; /* both deleted */
1639         case 2: how = "AU"; break; /* added by us */
1640         case 3: how = "UD"; break; /* deleted by them */
1641         case 4: how = "UA"; break; /* added by them */
1642         case 5: how = "DU"; break; /* deleted by us */
1643         case 6: how = "AA"; break; /* both added */
1644         case 7: how = "UU"; break; /* both modified */
1645         }
1646         color_fprintf(s->fp, color(WT_STATUS_UNMERGED, s), "%s", how);
1647         if (s->null_termination) {
1648                 fprintf(stdout, " %s%c", it->string, 0);
1649         } else {
1650                 struct strbuf onebuf = STRBUF_INIT;
1651                 const char *one;
1652                 one = quote_path(it->string, s->prefix, &onebuf);
1653                 printf(" %s\n", one);
1654                 strbuf_release(&onebuf);
1655         }
1656 }
1657
1658 static void wt_shortstatus_status(struct string_list_item *it,
1659                          struct wt_status *s)
1660 {
1661         struct wt_status_change_data *d = it->util;
1662
1663         if (d->index_status)
1664                 color_fprintf(s->fp, color(WT_STATUS_UPDATED, s), "%c", d->index_status);
1665         else
1666                 putchar(' ');
1667         if (d->worktree_status)
1668                 color_fprintf(s->fp, color(WT_STATUS_CHANGED, s), "%c", d->worktree_status);
1669         else
1670                 putchar(' ');
1671         putchar(' ');
1672         if (s->null_termination) {
1673                 fprintf(stdout, "%s%c", it->string, 0);
1674                 if (d->head_path)
1675                         fprintf(stdout, "%s%c", d->head_path, 0);
1676         } else {
1677                 struct strbuf onebuf = STRBUF_INIT;
1678                 const char *one;
1679                 if (d->head_path) {
1680                         one = quote_path(d->head_path, s->prefix, &onebuf);
1681                         if (*one != '"' && strchr(one, ' ') != NULL) {
1682                                 putchar('"');
1683                                 strbuf_addch(&onebuf, '"');
1684                                 one = onebuf.buf;
1685                         }
1686                         printf("%s -> ", one);
1687                         strbuf_release(&onebuf);
1688                 }
1689                 one = quote_path(it->string, s->prefix, &onebuf);
1690                 if (*one != '"' && strchr(one, ' ') != NULL) {
1691                         putchar('"');
1692                         strbuf_addch(&onebuf, '"');
1693                         one = onebuf.buf;
1694                 }
1695                 printf("%s\n", one);
1696                 strbuf_release(&onebuf);
1697         }
1698 }
1699
1700 static void wt_shortstatus_other(struct string_list_item *it,
1701                                  struct wt_status *s, const char *sign)
1702 {
1703         if (s->null_termination) {
1704                 fprintf(stdout, "%s %s%c", sign, it->string, 0);
1705         } else {
1706                 struct strbuf onebuf = STRBUF_INIT;
1707                 const char *one;
1708                 one = quote_path(it->string, s->prefix, &onebuf);
1709                 color_fprintf(s->fp, color(WT_STATUS_UNTRACKED, s), "%s", sign);
1710                 printf(" %s\n", one);
1711                 strbuf_release(&onebuf);
1712         }
1713 }
1714
1715 static void wt_shortstatus_print_tracking(struct wt_status *s)
1716 {
1717         struct branch *branch;
1718         const char *header_color = color(WT_STATUS_HEADER, s);
1719         const char *branch_color_local = color(WT_STATUS_LOCAL_BRANCH, s);
1720         const char *branch_color_remote = color(WT_STATUS_REMOTE_BRANCH, s);
1721
1722         const char *base;
1723         const char *branch_name;
1724         int num_ours, num_theirs;
1725         int upstream_is_gone = 0;
1726
1727         color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "## ");
1728
1729         if (!s->branch)
1730                 return;
1731         branch_name = s->branch;
1732
1733         if (s->is_initial)
1734                 color_fprintf(s->fp, header_color, _("Initial commit on "));
1735
1736         if (!strcmp(s->branch, "HEAD")) {
1737                 color_fprintf(s->fp, color(WT_STATUS_NOBRANCH, s), "%s",
1738                               _("HEAD (no branch)"));
1739                 goto conclude;
1740         }
1741
1742         skip_prefix(branch_name, "refs/heads/", &branch_name);
1743
1744         branch = branch_get(branch_name);
1745
1746         color_fprintf(s->fp, branch_color_local, "%s", branch_name);
1747
1748         if (stat_tracking_info(branch, &num_ours, &num_theirs, &base) < 0) {
1749                 if (!base)
1750                         goto conclude;
1751
1752                 upstream_is_gone = 1;
1753         }
1754
1755         base = shorten_unambiguous_ref(base, 0);
1756         color_fprintf(s->fp, header_color, "...");
1757         color_fprintf(s->fp, branch_color_remote, "%s", base);
1758         free((char *)base);
1759
1760         if (!upstream_is_gone && !num_ours && !num_theirs)
1761                 goto conclude;
1762
1763 #define LABEL(string) (s->no_gettext ? (string) : _(string))
1764
1765         color_fprintf(s->fp, header_color, " [");
1766         if (upstream_is_gone) {
1767                 color_fprintf(s->fp, header_color, LABEL(N_("gone")));
1768         } else if (!num_ours) {
1769                 color_fprintf(s->fp, header_color, LABEL(N_("behind ")));
1770                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1771         } else if (!num_theirs) {
1772                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1773                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1774         } else {
1775                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1776                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1777                 color_fprintf(s->fp, header_color, ", %s", LABEL(N_("behind ")));
1778                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1779         }
1780
1781         color_fprintf(s->fp, header_color, "]");
1782  conclude:
1783         fputc(s->null_termination ? '\0' : '\n', s->fp);
1784 }
1785
1786 static void wt_shortstatus_print(struct wt_status *s)
1787 {
1788         int i;
1789
1790         if (s->show_branch)
1791                 wt_shortstatus_print_tracking(s);
1792
1793         for (i = 0; i < s->change.nr; i++) {
1794                 struct wt_status_change_data *d;
1795                 struct string_list_item *it;
1796
1797                 it = &(s->change.items[i]);
1798                 d = it->util;
1799                 if (d->stagemask)
1800                         wt_shortstatus_unmerged(it, s);
1801                 else
1802                         wt_shortstatus_status(it, s);
1803         }
1804         for (i = 0; i < s->untracked.nr; i++) {
1805                 struct string_list_item *it;
1806
1807                 it = &(s->untracked.items[i]);
1808                 wt_shortstatus_other(it, s, "??");
1809         }
1810         for (i = 0; i < s->ignored.nr; i++) {
1811                 struct string_list_item *it;
1812
1813                 it = &(s->ignored.items[i]);
1814                 wt_shortstatus_other(it, s, "!!");
1815         }
1816 }
1817
1818 static void wt_porcelain_print(struct wt_status *s)
1819 {
1820         s->use_color = 0;
1821         s->relative_paths = 0;
1822         s->prefix = NULL;
1823         s->no_gettext = 1;
1824         wt_shortstatus_print(s);
1825 }
1826
1827 /*
1828  * Print branch information for porcelain v2 output.  These lines
1829  * are printed when the '--branch' parameter is given.
1830  *
1831  *    # branch.oid <commit><eol>
1832  *    # branch.head <head><eol>
1833  *   [# branch.upstream <upstream><eol>
1834  *   [# branch.ab +<ahead> -<behind><eol>]]
1835  *
1836  *      <commit> ::= the current commit hash or the the literal
1837  *                   "(initial)" to indicate an initialized repo
1838  *                   with no commits.
1839  *
1840  *        <head> ::= <branch_name> the current branch name or
1841  *                   "(detached)" literal when detached head or
1842  *                   "(unknown)" when something is wrong.
1843  *
1844  *    <upstream> ::= the upstream branch name, when set.
1845  *
1846  *       <ahead> ::= integer ahead value, when upstream set
1847  *                   and the commit is present (not gone).
1848  *
1849  *      <behind> ::= integer behind value, when upstream set
1850  *                   and commit is present.
1851  *
1852  *
1853  * The end-of-line is defined by the -z flag.
1854  *
1855  *                 <eol> ::= NUL when -z,
1856  *                           LF when NOT -z.
1857  *
1858  */
1859 static void wt_porcelain_v2_print_tracking(struct wt_status *s)
1860 {
1861         struct branch *branch;
1862         const char *base;
1863         const char *branch_name;
1864         struct wt_status_state state;
1865         int ab_info, nr_ahead, nr_behind;
1866         char eol = s->null_termination ? '\0' : '\n';
1867
1868         memset(&state, 0, sizeof(state));
1869         wt_status_get_state(&state, s->branch && !strcmp(s->branch, "HEAD"));
1870
1871         fprintf(s->fp, "# branch.oid %s%c",
1872                         (s->is_initial ? "(initial)" : sha1_to_hex(s->sha1_commit)),
1873                         eol);
1874
1875         if (!s->branch)
1876                 fprintf(s->fp, "# branch.head %s%c", "(unknown)", eol);
1877         else {
1878                 if (!strcmp(s->branch, "HEAD")) {
1879                         fprintf(s->fp, "# branch.head %s%c", "(detached)", eol);
1880
1881                         if (state.rebase_in_progress || state.rebase_interactive_in_progress)
1882                                 branch_name = state.onto;
1883                         else if (state.detached_from)
1884                                 branch_name = state.detached_from;
1885                         else
1886                                 branch_name = "";
1887                 } else {
1888                         branch_name = NULL;
1889                         skip_prefix(s->branch, "refs/heads/", &branch_name);
1890
1891                         fprintf(s->fp, "# branch.head %s%c", branch_name, eol);
1892                 }
1893
1894                 /* Lookup stats on the upstream tracking branch, if set. */
1895                 branch = branch_get(branch_name);
1896                 base = NULL;
1897                 ab_info = (stat_tracking_info(branch, &nr_ahead, &nr_behind, &base) == 0);
1898                 if (base) {
1899                         base = shorten_unambiguous_ref(base, 0);
1900                         fprintf(s->fp, "# branch.upstream %s%c", base, eol);
1901                         free((char *)base);
1902
1903                         if (ab_info)
1904                                 fprintf(s->fp, "# branch.ab +%d -%d%c", nr_ahead, nr_behind, eol);
1905                 }
1906         }
1907
1908         free(state.branch);
1909         free(state.onto);
1910         free(state.detached_from);
1911 }
1912
1913 /*
1914  * Convert various submodule status values into a
1915  * fixed-length string of characters in the buffer provided.
1916  */
1917 static void wt_porcelain_v2_submodule_state(
1918         struct wt_status_change_data *d,
1919         char sub[5])
1920 {
1921         if (S_ISGITLINK(d->mode_head) ||
1922                 S_ISGITLINK(d->mode_index) ||
1923                 S_ISGITLINK(d->mode_worktree)) {
1924                 sub[0] = 'S';
1925                 sub[1] = d->new_submodule_commits ? 'C' : '.';
1926                 sub[2] = (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED) ? 'M' : '.';
1927                 sub[3] = (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ? 'U' : '.';
1928         } else {
1929                 sub[0] = 'N';
1930                 sub[1] = '.';
1931                 sub[2] = '.';
1932                 sub[3] = '.';
1933         }
1934         sub[4] = 0;
1935 }
1936
1937 /*
1938  * Fix-up changed entries before we print them.
1939  */
1940 static void wt_porcelain_v2_fix_up_changed(
1941         struct string_list_item *it,
1942         struct wt_status *s)
1943 {
1944         struct wt_status_change_data *d = it->util;
1945
1946         if (!d->index_status) {
1947                 /*
1948                  * This entry is unchanged in the index (relative to the head).
1949                  * Therefore, the collect_updated_cb was never called for this
1950                  * entry (during the head-vs-index scan) and so the head column
1951                  * fields were never set.
1952                  *
1953                  * We must have data for the index column (from the
1954                  * index-vs-worktree scan (otherwise, this entry should not be
1955                  * in the list of changes)).
1956                  *
1957                  * Copy index column fields to the head column, so that our
1958                  * output looks complete.
1959                  */
1960                 assert(d->mode_head == 0);
1961                 d->mode_head = d->mode_index;
1962                 oidcpy(&d->oid_head, &d->oid_index);
1963         }
1964
1965         if (!d->worktree_status) {
1966                 /*
1967                  * This entry is unchanged in the worktree (relative to the index).
1968                  * Therefore, the collect_changed_cb was never called for this entry
1969                  * (during the index-vs-worktree scan) and so the worktree column
1970                  * fields were never set.
1971                  *
1972                  * We must have data for the index column (from the head-vs-index
1973                  * scan).
1974                  *
1975                  * Copy the index column fields to the worktree column so that
1976                  * our output looks complete.
1977                  *
1978                  * Note that we only have a mode field in the worktree column
1979                  * because the scan code tries really hard to not have to compute it.
1980                  */
1981                 assert(d->mode_worktree == 0);
1982                 d->mode_worktree = d->mode_index;
1983         }
1984 }
1985
1986 /*
1987  * Print porcelain v2 info for tracked entries with changes.
1988  */
1989 static void wt_porcelain_v2_print_changed_entry(
1990         struct string_list_item *it,
1991         struct wt_status *s)
1992 {
1993         struct wt_status_change_data *d = it->util;
1994         struct strbuf buf_index = STRBUF_INIT;
1995         struct strbuf buf_head = STRBUF_INIT;
1996         const char *path_index = NULL;
1997         const char *path_head = NULL;
1998         char key[3];
1999         char submodule_token[5];
2000         char sep_char, eol_char;
2001
2002         wt_porcelain_v2_fix_up_changed(it, s);
2003         wt_porcelain_v2_submodule_state(d, submodule_token);
2004
2005         key[0] = d->index_status ? d->index_status : '.';
2006         key[1] = d->worktree_status ? d->worktree_status : '.';
2007         key[2] = 0;
2008
2009         if (s->null_termination) {
2010                 /*
2011                  * In -z mode, we DO NOT C-quote pathnames.  Current path is ALWAYS first.
2012                  * A single NUL character separates them.
2013                  */
2014                 sep_char = '\0';
2015                 eol_char = '\0';
2016                 path_index = it->string;
2017                 path_head = d->head_path;
2018         } else {
2019                 /*
2020                  * Path(s) are C-quoted if necessary. Current path is ALWAYS first.
2021                  * The source path is only present when necessary.
2022                  * A single TAB separates them (because paths can contain spaces
2023                  * which are not escaped and C-quoting does escape TAB characters).
2024                  */
2025                 sep_char = '\t';
2026                 eol_char = '\n';
2027                 path_index = quote_path(it->string, s->prefix, &buf_index);
2028                 if (d->head_path)
2029                         path_head = quote_path(d->head_path, s->prefix, &buf_head);
2030         }
2031
2032         if (path_head)
2033                 fprintf(s->fp, "2 %s %s %06o %06o %06o %s %s %c%d %s%c%s%c",
2034                                 key, submodule_token,
2035                                 d->mode_head, d->mode_index, d->mode_worktree,
2036                                 oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
2037                                 key[0], d->score,
2038                                 path_index, sep_char, path_head, eol_char);
2039         else
2040                 fprintf(s->fp, "1 %s %s %06o %06o %06o %s %s %s%c",
2041                                 key, submodule_token,
2042                                 d->mode_head, d->mode_index, d->mode_worktree,
2043                                 oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
2044                                 path_index, eol_char);
2045
2046         strbuf_release(&buf_index);
2047         strbuf_release(&buf_head);
2048 }
2049
2050 /*
2051  * Print porcelain v2 status info for unmerged entries.
2052  */
2053 static void wt_porcelain_v2_print_unmerged_entry(
2054         struct string_list_item *it,
2055         struct wt_status *s)
2056 {
2057         struct wt_status_change_data *d = it->util;
2058         const struct cache_entry *ce;
2059         struct strbuf buf_index = STRBUF_INIT;
2060         const char *path_index = NULL;
2061         int pos, stage, sum;
2062         struct {
2063                 int mode;
2064                 struct object_id oid;
2065         } stages[3];
2066         char *key;
2067         char submodule_token[5];
2068         char unmerged_prefix = 'u';
2069         char eol_char = s->null_termination ? '\0' : '\n';
2070
2071         wt_porcelain_v2_submodule_state(d, submodule_token);
2072
2073         switch (d->stagemask) {
2074         case 1: key = "DD"; break; /* both deleted */
2075         case 2: key = "AU"; break; /* added by us */
2076         case 3: key = "UD"; break; /* deleted by them */
2077         case 4: key = "UA"; break; /* added by them */
2078         case 5: key = "DU"; break; /* deleted by us */
2079         case 6: key = "AA"; break; /* both added */
2080         case 7: key = "UU"; break; /* both modified */
2081         default:
2082                 die("BUG: unhandled unmerged status %x", d->stagemask);
2083         }
2084
2085         /*
2086          * Disregard d.aux.porcelain_v2 data that we accumulated
2087          * for the head and index columns during the scans and
2088          * replace with the actual stage data.
2089          *
2090          * Note that this is a last-one-wins for each the individual
2091          * stage [123] columns in the event of multiple cache entries
2092          * for same stage.
2093          */
2094         memset(stages, 0, sizeof(stages));
2095         sum = 0;
2096         pos = cache_name_pos(it->string, strlen(it->string));
2097         assert(pos < 0);
2098         pos = -pos-1;
2099         while (pos < active_nr) {
2100                 ce = active_cache[pos++];
2101                 stage = ce_stage(ce);
2102                 if (strcmp(ce->name, it->string) || !stage)
2103                         break;
2104                 stages[stage - 1].mode = ce->ce_mode;
2105                 oidcpy(&stages[stage - 1].oid, &ce->oid);
2106                 sum |= (1 << (stage - 1));
2107         }
2108         if (sum != d->stagemask)
2109                 die("BUG: observed stagemask 0x%x != expected stagemask 0x%x", sum, d->stagemask);
2110
2111         if (s->null_termination)
2112                 path_index = it->string;
2113         else
2114                 path_index = quote_path(it->string, s->prefix, &buf_index);
2115
2116         fprintf(s->fp, "%c %s %s %06o %06o %06o %06o %s %s %s %s%c",
2117                         unmerged_prefix, key, submodule_token,
2118                         stages[0].mode, /* stage 1 */
2119                         stages[1].mode, /* stage 2 */
2120                         stages[2].mode, /* stage 3 */
2121                         d->mode_worktree,
2122                         oid_to_hex(&stages[0].oid), /* stage 1 */
2123                         oid_to_hex(&stages[1].oid), /* stage 2 */
2124                         oid_to_hex(&stages[2].oid), /* stage 3 */
2125                         path_index,
2126                         eol_char);
2127
2128         strbuf_release(&buf_index);
2129 }
2130
2131 /*
2132  * Print porcelain V2 status info for untracked and ignored entries.
2133  */
2134 static void wt_porcelain_v2_print_other(
2135         struct string_list_item *it,
2136         struct wt_status *s,
2137         char prefix)
2138 {
2139         struct strbuf buf = STRBUF_INIT;
2140         const char *path;
2141         char eol_char;
2142
2143         if (s->null_termination) {
2144                 path = it->string;
2145                 eol_char = '\0';
2146         } else {
2147                 path = quote_path(it->string, s->prefix, &buf);
2148                 eol_char = '\n';
2149         }
2150
2151         fprintf(s->fp, "%c %s%c", prefix, path, eol_char);
2152
2153         strbuf_release(&buf);
2154 }
2155
2156 /*
2157  * Print porcelain V2 status.
2158  *
2159  * [<v2_branch>]
2160  * [<v2_changed_items>]*
2161  * [<v2_unmerged_items>]*
2162  * [<v2_untracked_items>]*
2163  * [<v2_ignored_items>]*
2164  *
2165  */
2166 static void wt_porcelain_v2_print(struct wt_status *s)
2167 {
2168         struct wt_status_change_data *d;
2169         struct string_list_item *it;
2170         int i;
2171
2172         if (s->show_branch)
2173                 wt_porcelain_v2_print_tracking(s);
2174
2175         for (i = 0; i < s->change.nr; i++) {
2176                 it = &(s->change.items[i]);
2177                 d = it->util;
2178                 if (!d->stagemask)
2179                         wt_porcelain_v2_print_changed_entry(it, s);
2180         }
2181
2182         for (i = 0; i < s->change.nr; i++) {
2183                 it = &(s->change.items[i]);
2184                 d = it->util;
2185                 if (d->stagemask)
2186                         wt_porcelain_v2_print_unmerged_entry(it, s);
2187         }
2188
2189         for (i = 0; i < s->untracked.nr; i++) {
2190                 it = &(s->untracked.items[i]);
2191                 wt_porcelain_v2_print_other(it, s, '?');
2192         }
2193
2194         for (i = 0; i < s->ignored.nr; i++) {
2195                 it = &(s->ignored.items[i]);
2196                 wt_porcelain_v2_print_other(it, s, '!');
2197         }
2198 }
2199
2200 void wt_status_print(struct wt_status *s)
2201 {
2202         switch (s->status_format) {
2203         case STATUS_FORMAT_SHORT:
2204                 wt_shortstatus_print(s);
2205                 break;
2206         case STATUS_FORMAT_PORCELAIN:
2207                 wt_porcelain_print(s);
2208                 break;
2209         case STATUS_FORMAT_PORCELAIN_V2:
2210                 wt_porcelain_v2_print(s);
2211                 break;
2212         case STATUS_FORMAT_UNSPECIFIED:
2213                 die("BUG: finalize_deferred_config() should have been called");
2214                 break;
2215         case STATUS_FORMAT_NONE:
2216         case STATUS_FORMAT_LONG:
2217                 wt_longstatus_print(s);
2218                 break;
2219         }
2220 }
2221
2222 /**
2223  * Returns 1 if there are unstaged changes, 0 otherwise.
2224  */
2225 int has_unstaged_changes(int ignore_submodules)
2226 {
2227         struct rev_info rev_info;
2228         int result;
2229
2230         init_revisions(&rev_info, NULL);
2231         if (ignore_submodules)
2232                 DIFF_OPT_SET(&rev_info.diffopt, IGNORE_SUBMODULES);
2233         DIFF_OPT_SET(&rev_info.diffopt, QUICK);
2234         diff_setup_done(&rev_info.diffopt);
2235         result = run_diff_files(&rev_info, 0);
2236         return diff_result_code(&rev_info.diffopt, result);
2237 }
2238
2239 /**
2240  * Returns 1 if there are uncommitted changes, 0 otherwise.
2241  */
2242 int has_uncommitted_changes(int ignore_submodules)
2243 {
2244         struct rev_info rev_info;
2245         int result;
2246
2247         if (is_cache_unborn())
2248                 return 0;
2249
2250         init_revisions(&rev_info, NULL);
2251         if (ignore_submodules)
2252                 DIFF_OPT_SET(&rev_info.diffopt, IGNORE_SUBMODULES);
2253         DIFF_OPT_SET(&rev_info.diffopt, QUICK);
2254         add_head_to_pending(&rev_info);
2255         diff_setup_done(&rev_info.diffopt);
2256         result = run_diff_index(&rev_info, 1);
2257         return diff_result_code(&rev_info.diffopt, result);
2258 }
2259
2260 /**
2261  * If the work tree has unstaged or uncommitted changes, dies with the
2262  * appropriate message.
2263  */
2264 int require_clean_work_tree(const char *action, const char *hint, int ignore_submodules, int gently)
2265 {
2266         struct lock_file *lock_file = xcalloc(1, sizeof(*lock_file));
2267         int err = 0, fd;
2268
2269         fd = hold_locked_index(lock_file, 0);
2270         refresh_cache(REFRESH_QUIET);
2271         if (0 <= fd)
2272                 update_index_if_able(&the_index, lock_file);
2273         rollback_lock_file(lock_file);
2274
2275         if (has_unstaged_changes(ignore_submodules)) {
2276                 /* TRANSLATORS: the action is e.g. "pull with rebase" */
2277                 error(_("cannot %s: You have unstaged changes."), _(action));
2278                 err = 1;
2279         }
2280
2281         if (has_uncommitted_changes(ignore_submodules)) {
2282                 if (err)
2283                         error(_("additionally, your index contains uncommitted changes."));
2284                 else
2285                         error(_("cannot %s: Your index contains uncommitted changes."),
2286                               _(action));
2287                 err = 1;
2288         }
2289
2290         if (err) {
2291                 if (hint)
2292                         error("%s", hint);
2293                 if (!gently)
2294                         exit(128);
2295         }
2296
2297         return err;
2298 }