git.oblomov.eu Git - git/blob - wt-status.c

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