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                         status_printf_ln(s, color,
 954                                          _("  (use \"git merge --abort\" to abort the merge)"));
 955                 }
 956         } else {
 957                 s-> commitable = 1;
 958                 status_printf_ln(s, color,
 959                         _("All conflicts fixed but you are still merging."));
 960                 if (s->hints)
 961                         status_printf_ln(s, color,
 962                                 _("  (use \"git commit\" to conclude merge)"));
 963         }
 964         wt_status_print_trailer(s);
 965 }
 966
 967 static void show_am_in_progress(struct wt_status *s,
 968                                 struct wt_status_state *state,
 969                                 const char *color)
 970 {
 971         status_printf_ln(s, color,
 972                 _("You are in the middle of an am session."));
 973         if (state->am_empty_patch)
 974                 status_printf_ln(s, color,
 975                         _("The current patch is empty."));
 976         if (s->hints) {
 977                 if (!state->am_empty_patch)
 978                         status_printf_ln(s, color,
 979                                 _("  (fix conflicts and then run \"git am --continue\")"));
 980                 status_printf_ln(s, color,
 981                         _("  (use \"git am --skip\" to skip this patch)"));
 982                 status_printf_ln(s, color,
 983                         _("  (use \"git am --abort\" to restore the original branch)"));
 984         }
 985         wt_status_print_trailer(s);
 986 }
 987
 988 static char *read_line_from_git_path(const char *filename)
 989 {
 990         struct strbuf buf = STRBUF_INIT;
 991         FILE *fp = fopen(git_path("%s", filename), "r");
 992         if (!fp) {
 993                 strbuf_release(&buf);
 994                 return NULL;
 995         }
 996         strbuf_getline_lf(&buf, fp);
 997         if (!fclose(fp)) {
 998                 return strbuf_detach(&buf, NULL);
 999         } else {
1000                 strbuf_release(&buf);
1001                 return NULL;
1002         }
1003 }
1004
1005 static int split_commit_in_progress(struct wt_status *s)
1006 {
1007         int split_in_progress = 0;
1008         char *head = read_line_from_git_path("HEAD");
1009         char *orig_head = read_line_from_git_path("ORIG_HEAD");
1010         char *rebase_amend = read_line_from_git_path("rebase-merge/amend");
1011         char *rebase_orig_head = read_line_from_git_path("rebase-merge/orig-head");
1012
1013         if (!head || !orig_head || !rebase_amend || !rebase_orig_head ||
1014             !s->branch || strcmp(s->branch, "HEAD"))
1015                 return split_in_progress;
1016
1017         if (!strcmp(rebase_amend, rebase_orig_head)) {
1018                 if (strcmp(head, rebase_amend))
1019                         split_in_progress = 1;
1020         } else if (strcmp(orig_head, rebase_orig_head)) {
1021                 split_in_progress = 1;
1022         }
1023
1024         if (!s->amend && !s->nowarn && !s->workdir_dirty)
1025                 split_in_progress = 0;
1026
1027         free(head);
1028         free(orig_head);
1029         free(rebase_amend);
1030         free(rebase_orig_head);
1031         return split_in_progress;
1032 }
1033
1034 /*
1035  * Turn
1036  * "pick d6a2f0303e897ec257dd0e0a39a5ccb709bc2047 some message"
1037  * into
1038  * "pick d6a2f03 some message"
1039  *
1040  * The function assumes that the line does not contain useless spaces
1041  * before or after the command.
1042  */
1043 static void abbrev_sha1_in_line(struct strbuf *line)
1044 {
1045         struct strbuf **split;
1046         int i;
1047
1048         if (starts_with(line->buf, "exec ") ||
1049             starts_with(line->buf, "x "))
1050                 return;
1051
1052         split = strbuf_split_max(line, ' ', 3);
1053         if (split[0] && split[1]) {
1054                 unsigned char sha1[20];
1055                 const char *abbrev;
1056
1057                 /*
1058                  * strbuf_split_max left a space. Trim it and re-add
1059                  * it after abbreviation.
1060                  */
1061                 strbuf_trim(split[1]);
1062                 if (!get_sha1(split[1]->buf, sha1)) {
1063                         abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
1064                         strbuf_reset(split[1]);
1065                         strbuf_addf(split[1], "%s ", abbrev);
1066                         strbuf_reset(line);
1067                         for (i = 0; split[i]; i++)
1068                                 strbuf_addbuf(line, split[i]);
1069                 }
1070         }
1071         strbuf_list_free(split);
1072 }
1073
1074 static void read_rebase_todolist(const char *fname, struct string_list *lines)
1075 {
1076         struct strbuf line = STRBUF_INIT;
1077         FILE *f = fopen(git_path("%s", fname), "r");
1078
1079         if (!f)
1080                 die_errno("Could not open file %s for reading",
1081                           git_path("%s", fname));
1082         while (!strbuf_getline_lf(&line, f)) {
1083                 if (line.len && line.buf[0] == comment_line_char)
1084                         continue;
1085                 strbuf_trim(&line);
1086                 if (!line.len)
1087                         continue;
1088                 abbrev_sha1_in_line(&line);
1089                 string_list_append(lines, line.buf);
1090         }
1091 }
1092
1093 static void show_rebase_information(struct wt_status *s,
1094                                         struct wt_status_state *state,
1095                                         const char *color)
1096 {
1097         if (state->rebase_interactive_in_progress) {
1098                 int i;
1099                 int nr_lines_to_show = 2;
1100
1101                 struct string_list have_done = STRING_LIST_INIT_DUP;
1102                 struct string_list yet_to_do = STRING_LIST_INIT_DUP;
1103
1104                 read_rebase_todolist("rebase-merge/done", &have_done);
1105                 read_rebase_todolist("rebase-merge/git-rebase-todo", &yet_to_do);
1106
1107                 if (have_done.nr == 0)
1108                         status_printf_ln(s, color, _("No commands done."));
1109                 else {
1110                         status_printf_ln(s, color,
1111                                 Q_("Last command done (%d command done):",
1112                                         "Last commands done (%d commands done):",
1113                                         have_done.nr),
1114                                 have_done.nr);
1115                         for (i = (have_done.nr > nr_lines_to_show)
1116                                 ? have_done.nr - nr_lines_to_show : 0;
1117                                 i < have_done.nr;
1118                                 i++)
1119                                 status_printf_ln(s, color, "   %s", have_done.items[i].string);
1120                         if (have_done.nr > nr_lines_to_show && s->hints)
1121                                 status_printf_ln(s, color,
1122                                         _("  (see more in file %s)"), git_path("rebase-merge/done"));
1123                 }
1124
1125                 if (yet_to_do.nr == 0)
1126                         status_printf_ln(s, color,
1127                                          _("No commands remaining."));
1128                 else {
1129                         status_printf_ln(s, color,
1130                                 Q_("Next command to do (%d remaining command):",
1131                                         "Next commands to do (%d remaining commands):",
1132                                         yet_to_do.nr),
1133                                 yet_to_do.nr);
1134                         for (i = 0; i < nr_lines_to_show && i < yet_to_do.nr; i++)
1135                                 status_printf_ln(s, color, "   %s", yet_to_do.items[i].string);
1136                         if (s->hints)
1137                                 status_printf_ln(s, color,
1138                                         _("  (use \"git rebase --edit-todo\" to view and edit)"));
1139                 }
1140                 string_list_clear(&yet_to_do, 0);
1141                 string_list_clear(&have_done, 0);
1142         }
1143 }
1144
1145 static void print_rebase_state(struct wt_status *s,
1146                                 struct wt_status_state *state,
1147                                 const char *color)
1148 {
1149         if (state->branch)
1150                 status_printf_ln(s, color,
1151                                  _("You are currently rebasing branch '%s' on '%s'."),
1152                                  state->branch,
1153                                  state->onto);
1154         else
1155                 status_printf_ln(s, color,
1156                                  _("You are currently rebasing."));
1157 }
1158
1159 static void show_rebase_in_progress(struct wt_status *s,
1160                                 struct wt_status_state *state,
1161                                 const char *color)
1162 {
1163         struct stat st;
1164
1165         show_rebase_information(s, state, color);
1166         if (has_unmerged(s)) {
1167                 print_rebase_state(s, state, color);
1168                 if (s->hints) {
1169                         status_printf_ln(s, color,
1170                                 _("  (fix conflicts and then run \"git rebase --continue\")"));
1171                         status_printf_ln(s, color,
1172                                 _("  (use \"git rebase --skip\" to skip this patch)"));
1173                         status_printf_ln(s, color,
1174                                 _("  (use \"git rebase --abort\" to check out the original branch)"));
1175                 }
1176         } else if (state->rebase_in_progress || !stat(git_path_merge_msg(), &st)) {
1177                 print_rebase_state(s, state, color);
1178                 if (s->hints)
1179                         status_printf_ln(s, color,
1180                                 _("  (all conflicts fixed: run \"git rebase --continue\")"));
1181         } else if (split_commit_in_progress(s)) {
1182                 if (state->branch)
1183                         status_printf_ln(s, color,
1184                                          _("You are currently splitting a commit while rebasing branch '%s' on '%s'."),
1185                                          state->branch,
1186                                          state->onto);
1187                 else
1188                         status_printf_ln(s, color,
1189                                          _("You are currently splitting a commit during a rebase."));
1190                 if (s->hints)
1191                         status_printf_ln(s, color,
1192                                 _("  (Once your working directory is clean, run \"git rebase --continue\")"));
1193         } else {
1194                 if (state->branch)
1195                         status_printf_ln(s, color,
1196                                          _("You are currently editing a commit while rebasing branch '%s' on '%s'."),
1197                                          state->branch,
1198                                          state->onto);
1199                 else
1200                         status_printf_ln(s, color,
1201                                          _("You are currently editing a commit during a rebase."));
1202                 if (s->hints && !s->amend) {
1203                         status_printf_ln(s, color,
1204                                 _("  (use \"git commit --amend\" to amend the current commit)"));
1205                         status_printf_ln(s, color,
1206                                 _("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
1207                 }
1208         }
1209         wt_status_print_trailer(s);
1210 }
1211
1212 static void show_cherry_pick_in_progress(struct wt_status *s,
1213                                         struct wt_status_state *state,
1214                                         const char *color)
1215 {
1216         status_printf_ln(s, color, _("You are currently cherry-picking commit %s."),
1217                         find_unique_abbrev(state->cherry_pick_head_sha1, DEFAULT_ABBREV));
1218         if (s->hints) {
1219                 if (has_unmerged(s))
1220                         status_printf_ln(s, color,
1221                                 _("  (fix conflicts and run \"git cherry-pick --continue\")"));
1222                 else
1223                         status_printf_ln(s, color,
1224                                 _("  (all conflicts fixed: run \"git cherry-pick --continue\")"));
1225                 status_printf_ln(s, color,
1226                         _("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
1227         }
1228         wt_status_print_trailer(s);
1229 }
1230
1231 static void show_revert_in_progress(struct wt_status *s,
1232                                         struct wt_status_state *state,
1233                                         const char *color)
1234 {
1235         status_printf_ln(s, color, _("You are currently reverting commit %s."),
1236                          find_unique_abbrev(state->revert_head_sha1, DEFAULT_ABBREV));
1237         if (s->hints) {
1238                 if (has_unmerged(s))
1239                         status_printf_ln(s, color,
1240                                 _("  (fix conflicts and run \"git revert --continue\")"));
1241                 else
1242                         status_printf_ln(s, color,
1243                                 _("  (all conflicts fixed: run \"git revert --continue\")"));
1244                 status_printf_ln(s, color,
1245                         _("  (use \"git revert --abort\" to cancel the revert operation)"));
1246         }
1247         wt_status_print_trailer(s);
1248 }
1249
1250 static void show_bisect_in_progress(struct wt_status *s,
1251                                 struct wt_status_state *state,
1252                                 const char *color)
1253 {
1254         if (state->branch)
1255                 status_printf_ln(s, color,
1256                                  _("You are currently bisecting, started from branch '%s'."),
1257                                  state->branch);
1258         else
1259                 status_printf_ln(s, color,
1260                                  _("You are currently bisecting."));
1261         if (s->hints)
1262                 status_printf_ln(s, color,
1263                         _("  (use \"git bisect reset\" to get back to the original branch)"));
1264         wt_status_print_trailer(s);
1265 }
1266
1267 /*
1268  * Extract branch information from rebase/bisect
1269  */
1270 static char *get_branch(const struct worktree *wt, const char *path)
1271 {
1272         struct strbuf sb = STRBUF_INIT;
1273         unsigned char sha1[20];
1274         const char *branch_name;
1275
1276         if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
1277                 goto got_nothing;
1278
1279         while (sb.len && sb.buf[sb.len - 1] == '\n')
1280                 strbuf_setlen(&sb, sb.len - 1);
1281         if (!sb.len)
1282                 goto got_nothing;
1283         if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
1284                 strbuf_remove(&sb, 0, branch_name - sb.buf);
1285         else if (starts_with(sb.buf, "refs/"))
1286                 ;
1287         else if (!get_sha1_hex(sb.buf, sha1)) {
1288                 const char *abbrev;
1289                 abbrev = find_unique_abbrev(sha1, DEFAULT_ABBREV);
1290                 strbuf_reset(&sb);
1291                 strbuf_addstr(&sb, abbrev);
1292         } else if (!strcmp(sb.buf, "detached HEAD")) /* rebase */
1293                 goto got_nothing;
1294         else                    /* bisect */
1295                 ;
1296         return strbuf_detach(&sb, NULL);
1297
1298 got_nothing:
1299         strbuf_release(&sb);
1300         return NULL;
1301 }
1302
1303 struct grab_1st_switch_cbdata {
1304         struct strbuf buf;
1305         unsigned char nsha1[20];
1306 };
1307
1308 static int grab_1st_switch(unsigned char *osha1, unsigned char *nsha1,
1309                            const char *email, unsigned long timestamp, int tz,
1310                            const char *message, void *cb_data)
1311 {
1312         struct grab_1st_switch_cbdata *cb = cb_data;
1313         const char *target = NULL, *end;
1314
1315         if (!skip_prefix(message, "checkout: moving from ", &message))
1316                 return 0;
1317         target = strstr(message, " to ");
1318         if (!target)
1319                 return 0;
1320         target += strlen(" to ");
1321         strbuf_reset(&cb->buf);
1322         hashcpy(cb->nsha1, nsha1);
1323         end = strchrnul(target, '\n');
1324         strbuf_add(&cb->buf, target, end - target);
1325         if (!strcmp(cb->buf.buf, "HEAD")) {
1326                 /* HEAD is relative. Resolve it to the right reflog entry. */
1327                 strbuf_reset(&cb->buf);
1328                 strbuf_addstr(&cb->buf,
1329                               find_unique_abbrev(nsha1, DEFAULT_ABBREV));
1330         }
1331         return 1;
1332 }
1333
1334 static void wt_status_get_detached_from(struct wt_status_state *state)
1335 {
1336         struct grab_1st_switch_cbdata cb;
1337         struct commit *commit;
1338         unsigned char sha1[20];
1339         char *ref = NULL;
1340
1341         strbuf_init(&cb.buf, 0);
1342         if (for_each_reflog_ent_reverse("HEAD", grab_1st_switch, &cb) <= 0) {
1343                 strbuf_release(&cb.buf);
1344                 return;
1345         }
1346
1347         if (dwim_ref(cb.buf.buf, cb.buf.len, sha1, &ref) == 1 &&
1348             /* sha1 is a commit? match without further lookup */
1349             (!hashcmp(cb.nsha1, sha1) ||
1350              /* perhaps sha1 is a tag, try to dereference to a commit */
1351              ((commit = lookup_commit_reference_gently(sha1, 1)) != NULL &&
1352               !hashcmp(cb.nsha1, commit->object.oid.hash)))) {
1353                 const char *from = ref;
1354                 if (!skip_prefix(from, "refs/tags/", &from))
1355                         skip_prefix(from, "refs/remotes/", &from);
1356                 state->detached_from = xstrdup(from);
1357         } else
1358                 state->detached_from =
1359                         xstrdup(find_unique_abbrev(cb.nsha1, DEFAULT_ABBREV));
1360         hashcpy(state->detached_sha1, cb.nsha1);
1361         state->detached_at = !get_sha1("HEAD", sha1) &&
1362                              !hashcmp(sha1, state->detached_sha1);
1363
1364         free(ref);
1365         strbuf_release(&cb.buf);
1366 }
1367
1368 int wt_status_check_rebase(const struct worktree *wt,
1369                            struct wt_status_state *state)
1370 {
1371         struct stat st;
1372
1373         if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
1374                 if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
1375                         state->am_in_progress = 1;
1376                         if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
1377                                 state->am_empty_patch = 1;
1378                 } else {
1379                         state->rebase_in_progress = 1;
1380                         state->branch = get_branch(wt, "rebase-apply/head-name");
1381                         state->onto = get_branch(wt, "rebase-apply/onto");
1382                 }
1383         } else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
1384                 if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
1385                         state->rebase_interactive_in_progress = 1;
1386                 else
1387                         state->rebase_in_progress = 1;
1388                 state->branch = get_branch(wt, "rebase-merge/head-name");
1389                 state->onto = get_branch(wt, "rebase-merge/onto");
1390         } else
1391                 return 0;
1392         return 1;
1393 }
1394
1395 int wt_status_check_bisect(const struct worktree *wt,
1396                            struct wt_status_state *state)
1397 {
1398         struct stat st;
1399
1400         if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
1401                 state->bisect_in_progress = 1;
1402                 state->branch = get_branch(wt, "BISECT_START");
1403                 return 1;
1404         }
1405         return 0;
1406 }
1407
1408 void wt_status_get_state(struct wt_status_state *state,
1409                          int get_detached_from)
1410 {
1411         struct stat st;
1412         unsigned char sha1[20];
1413
1414         if (!stat(git_path_merge_head(), &st)) {
1415                 state->merge_in_progress = 1;
1416         } else if (wt_status_check_rebase(NULL, state)) {
1417                 ;               /* all set */
1418         } else if (!stat(git_path_cherry_pick_head(), &st) &&
1419                         !get_sha1("CHERRY_PICK_HEAD", sha1)) {
1420                 state->cherry_pick_in_progress = 1;
1421                 hashcpy(state->cherry_pick_head_sha1, sha1);
1422         }
1423         wt_status_check_bisect(NULL, state);
1424         if (!stat(git_path_revert_head(), &st) &&
1425             !get_sha1("REVERT_HEAD", sha1)) {
1426                 state->revert_in_progress = 1;
1427                 hashcpy(state->revert_head_sha1, sha1);
1428         }
1429
1430         if (get_detached_from)
1431                 wt_status_get_detached_from(state);
1432 }
1433
1434 static void wt_status_print_state(struct wt_status *s,
1435                                   struct wt_status_state *state)
1436 {
1437         const char *state_color = color(WT_STATUS_HEADER, s);
1438         if (state->merge_in_progress)
1439                 show_merge_in_progress(s, state, state_color);
1440         else if (state->am_in_progress)
1441                 show_am_in_progress(s, state, state_color);
1442         else if (state->rebase_in_progress || state->rebase_interactive_in_progress)
1443                 show_rebase_in_progress(s, state, state_color);
1444         else if (state->cherry_pick_in_progress)
1445                 show_cherry_pick_in_progress(s, state, state_color);
1446         else if (state->revert_in_progress)
1447                 show_revert_in_progress(s, state, state_color);
1448         if (state->bisect_in_progress)
1449                 show_bisect_in_progress(s, state, state_color);
1450 }
1451
1452 void wt_status_print(struct wt_status *s)
1453 {
1454         const char *branch_color = color(WT_STATUS_ONBRANCH, s);
1455         const char *branch_status_color = color(WT_STATUS_HEADER, s);
1456         struct wt_status_state state;
1457
1458         memset(&state, 0, sizeof(state));
1459         wt_status_get_state(&state,
1460                             s->branch && !strcmp(s->branch, "HEAD"));
1461
1462         if (s->branch) {
1463                 const char *on_what = _("On branch ");
1464                 const char *branch_name = s->branch;
1465                 if (!strcmp(branch_name, "HEAD")) {
1466                         branch_status_color = color(WT_STATUS_NOBRANCH, s);
1467                         if (state.rebase_in_progress || state.rebase_interactive_in_progress) {
1468                                 if (state.rebase_interactive_in_progress)
1469                                         on_what = _("interactive rebase in progress; onto ");
1470                                 else
1471                                         on_what = _("rebase in progress; onto ");
1472                                 branch_name = state.onto;
1473                         } else if (state.detached_from) {
1474                                 branch_name = state.detached_from;
1475                                 if (state.detached_at)
1476                                         on_what = _("HEAD detached at ");
1477                                 else
1478                                         on_what = _("HEAD detached from ");
1479                         } else {
1480                                 branch_name = "";
1481                                 on_what = _("Not currently on any branch.");
1482                         }
1483                 } else
1484                         skip_prefix(branch_name, "refs/heads/", &branch_name);
1485                 status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
1486                 status_printf_more(s, branch_status_color, "%s", on_what);
1487                 status_printf_more(s, branch_color, "%s\n", branch_name);
1488                 if (!s->is_initial)
1489                         wt_status_print_tracking(s);
1490         }
1491
1492         wt_status_print_state(s, &state);
1493         free(state.branch);
1494         free(state.onto);
1495         free(state.detached_from);
1496
1497         if (s->is_initial) {
1498                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1499                 status_printf_ln(s, color(WT_STATUS_HEADER, s), _("Initial commit"));
1500                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1501         }
1502
1503         wt_status_print_updated(s);
1504         wt_status_print_unmerged(s);
1505         wt_status_print_changed(s);
1506         if (s->submodule_summary &&
1507             (!s->ignore_submodule_arg ||
1508              strcmp(s->ignore_submodule_arg, "all"))) {
1509                 wt_status_print_submodule_summary(s, 0);  /* staged */
1510                 wt_status_print_submodule_summary(s, 1);  /* unstaged */
1511         }
1512         if (s->show_untracked_files) {
1513                 wt_status_print_other(s, &s->untracked, _("Untracked files"), "add");
1514                 if (s->show_ignored_files)
1515                         wt_status_print_other(s, &s->ignored, _("Ignored files"), "add -f");
1516                 if (advice_status_u_option && 2000 < s->untracked_in_ms) {
1517                         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
1518                         status_printf_ln(s, GIT_COLOR_NORMAL,
1519                                          _("It took %.2f seconds to enumerate untracked files. 'status -uno'\n"
1520                                            "may speed it up, but you have to be careful not to forget to add\n"
1521                                            "new files yourself (see 'git help status')."),
1522                                          s->untracked_in_ms / 1000.0);
1523                 }
1524         } else if (s->commitable)
1525                 status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
1526                         s->hints
1527                         ? _(" (use -u option to show untracked files)") : "");
1528
1529         if (s->verbose)
1530                 wt_status_print_verbose(s);
1531         if (!s->commitable) {
1532                 if (s->amend)
1533                         status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
1534                 else if (s->nowarn)
1535                         ; /* nothing */
1536                 else if (s->workdir_dirty) {
1537                         if (s->hints)
1538                                 printf(_("no changes added to commit "
1539                                          "(use \"git add\" and/or \"git commit -a\")\n"));
1540                         else
1541                                 printf(_("no changes added to commit\n"));
1542                 } else if (s->untracked.nr) {
1543                         if (s->hints)
1544                                 printf(_("nothing added to commit but untracked files "
1545                                          "present (use \"git add\" to track)\n"));
1546                         else
1547                                 printf(_("nothing added to commit but untracked files present\n"));
1548                 } else if (s->is_initial) {
1549                         if (s->hints)
1550                                 printf(_("nothing to commit (create/copy files "
1551                                          "and use \"git add\" to track)\n"));
1552                         else
1553                                 printf(_("nothing to commit\n"));
1554                 } else if (!s->show_untracked_files) {
1555                         if (s->hints)
1556                                 printf(_("nothing to commit (use -u to show untracked files)\n"));
1557                         else
1558                                 printf(_("nothing to commit\n"));
1559                 } else
1560                         printf(_("nothing to commit, working tree clean\n"));
1561         }
1562 }
1563
1564 static void wt_shortstatus_unmerged(struct string_list_item *it,
1565                            struct wt_status *s)
1566 {
1567         struct wt_status_change_data *d = it->util;
1568         const char *how = "??";
1569
1570         switch (d->stagemask) {
1571         case 1: how = "DD"; break; /* both deleted */
1572         case 2: how = "AU"; break; /* added by us */
1573         case 3: how = "UD"; break; /* deleted by them */
1574         case 4: how = "UA"; break; /* added by them */
1575         case 5: how = "DU"; break; /* deleted by us */
1576         case 6: how = "AA"; break; /* both added */
1577         case 7: how = "UU"; break; /* both modified */
1578         }
1579         color_fprintf(s->fp, color(WT_STATUS_UNMERGED, s), "%s", how);
1580         if (s->null_termination) {
1581                 fprintf(stdout, " %s%c", it->string, 0);
1582         } else {
1583                 struct strbuf onebuf = STRBUF_INIT;
1584                 const char *one;
1585                 one = quote_path(it->string, s->prefix, &onebuf);
1586                 printf(" %s\n", one);
1587                 strbuf_release(&onebuf);
1588         }
1589 }
1590
1591 static void wt_shortstatus_status(struct string_list_item *it,
1592                          struct wt_status *s)
1593 {
1594         struct wt_status_change_data *d = it->util;
1595
1596         if (d->index_status)
1597                 color_fprintf(s->fp, color(WT_STATUS_UPDATED, s), "%c", d->index_status);
1598         else
1599                 putchar(' ');
1600         if (d->worktree_status)
1601                 color_fprintf(s->fp, color(WT_STATUS_CHANGED, s), "%c", d->worktree_status);
1602         else
1603                 putchar(' ');
1604         putchar(' ');
1605         if (s->null_termination) {
1606                 fprintf(stdout, "%s%c", it->string, 0);
1607                 if (d->head_path)
1608                         fprintf(stdout, "%s%c", d->head_path, 0);
1609         } else {
1610                 struct strbuf onebuf = STRBUF_INIT;
1611                 const char *one;
1612                 if (d->head_path) {
1613                         one = quote_path(d->head_path, s->prefix, &onebuf);
1614                         if (*one != '"' && strchr(one, ' ') != NULL) {
1615                                 putchar('"');
1616                                 strbuf_addch(&onebuf, '"');
1617                                 one = onebuf.buf;
1618                         }
1619                         printf("%s -> ", one);
1620                         strbuf_release(&onebuf);
1621                 }
1622                 one = quote_path(it->string, s->prefix, &onebuf);
1623                 if (*one != '"' && strchr(one, ' ') != NULL) {
1624                         putchar('"');
1625                         strbuf_addch(&onebuf, '"');
1626                         one = onebuf.buf;
1627                 }
1628                 printf("%s\n", one);
1629                 strbuf_release(&onebuf);
1630         }
1631 }
1632
1633 static void wt_shortstatus_other(struct string_list_item *it,
1634                                  struct wt_status *s, const char *sign)
1635 {
1636         if (s->null_termination) {
1637                 fprintf(stdout, "%s %s%c", sign, it->string, 0);
1638         } else {
1639                 struct strbuf onebuf = STRBUF_INIT;
1640                 const char *one;
1641                 one = quote_path(it->string, s->prefix, &onebuf);
1642                 color_fprintf(s->fp, color(WT_STATUS_UNTRACKED, s), "%s", sign);
1643                 printf(" %s\n", one);
1644                 strbuf_release(&onebuf);
1645         }
1646 }
1647
1648 static void wt_shortstatus_print_tracking(struct wt_status *s)
1649 {
1650         struct branch *branch;
1651         const char *header_color = color(WT_STATUS_HEADER, s);
1652         const char *branch_color_local = color(WT_STATUS_LOCAL_BRANCH, s);
1653         const char *branch_color_remote = color(WT_STATUS_REMOTE_BRANCH, s);
1654
1655         const char *base;
1656         const char *branch_name;
1657         int num_ours, num_theirs;
1658         int upstream_is_gone = 0;
1659
1660         color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "## ");
1661
1662         if (!s->branch)
1663                 return;
1664         branch_name = s->branch;
1665
1666         if (s->is_initial)
1667                 color_fprintf(s->fp, header_color, _("Initial commit on "));
1668
1669         if (!strcmp(s->branch, "HEAD")) {
1670                 color_fprintf(s->fp, color(WT_STATUS_NOBRANCH, s), "%s",
1671                               _("HEAD (no branch)"));
1672                 goto conclude;
1673         }
1674
1675         skip_prefix(branch_name, "refs/heads/", &branch_name);
1676
1677         branch = branch_get(branch_name);
1678
1679         color_fprintf(s->fp, branch_color_local, "%s", branch_name);
1680
1681         if (stat_tracking_info(branch, &num_ours, &num_theirs, &base) < 0) {
1682                 if (!base)
1683                         goto conclude;
1684
1685                 upstream_is_gone = 1;
1686         }
1687
1688         base = shorten_unambiguous_ref(base, 0);
1689         color_fprintf(s->fp, header_color, "...");
1690         color_fprintf(s->fp, branch_color_remote, "%s", base);
1691         free((char *)base);
1692
1693         if (!upstream_is_gone && !num_ours && !num_theirs)
1694                 goto conclude;
1695
1696 #define LABEL(string) (s->no_gettext ? (string) : _(string))
1697
1698         color_fprintf(s->fp, header_color, " [");
1699         if (upstream_is_gone) {
1700                 color_fprintf(s->fp, header_color, LABEL(N_("gone")));
1701         } else if (!num_ours) {
1702                 color_fprintf(s->fp, header_color, LABEL(N_("behind ")));
1703                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1704         } else if (!num_theirs) {
1705                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1706                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1707         } else {
1708                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1709                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1710                 color_fprintf(s->fp, header_color, ", %s", LABEL(N_("behind ")));
1711                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1712         }
1713
1714         color_fprintf(s->fp, header_color, "]");
1715  conclude:
1716         fputc(s->null_termination ? '\0' : '\n', s->fp);
1717 }
1718
1719 void wt_shortstatus_print(struct wt_status *s)
1720 {
1721         int i;
1722
1723         if (s->show_branch)
1724                 wt_shortstatus_print_tracking(s);
1725
1726         for (i = 0; i < s->change.nr; i++) {
1727                 struct wt_status_change_data *d;
1728                 struct string_list_item *it;
1729
1730                 it = &(s->change.items[i]);
1731                 d = it->util;
1732                 if (d->stagemask)
1733                         wt_shortstatus_unmerged(it, s);
1734                 else
1735                         wt_shortstatus_status(it, s);
1736         }
1737         for (i = 0; i < s->untracked.nr; i++) {
1738                 struct string_list_item *it;
1739
1740                 it = &(s->untracked.items[i]);
1741                 wt_shortstatus_other(it, s, "??");
1742         }
1743         for (i = 0; i < s->ignored.nr; i++) {
1744                 struct string_list_item *it;
1745
1746                 it = &(s->ignored.items[i]);
1747                 wt_shortstatus_other(it, s, "!!");
1748         }
1749 }
1750
1751 void wt_porcelain_print(struct wt_status *s)
1752 {
1753         s->use_color = 0;
1754         s->relative_paths = 0;
1755         s->prefix = NULL;
1756         s->no_gettext = 1;
1757         wt_shortstatus_print(s);
1758 }