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 #include "lockfile.h"
  20
  21 static const char cut_line[] =
  22 "------------------------ >8 ------------------------\n";
  23
  24 static char default_wt_status_colors[][COLOR_MAXLEN] = {
  25         GIT_COLOR_NORMAL, /* WT_STATUS_HEADER */
  26         GIT_COLOR_GREEN,  /* WT_STATUS_UPDATED */
  27         GIT_COLOR_RED,    /* WT_STATUS_CHANGED */
  28         GIT_COLOR_RED,    /* WT_STATUS_UNTRACKED */
  29         GIT_COLOR_RED,    /* WT_STATUS_NOBRANCH */
  30         GIT_COLOR_RED,    /* WT_STATUS_UNMERGED */
  31         GIT_COLOR_GREEN,  /* WT_STATUS_LOCAL_BRANCH */
  32         GIT_COLOR_RED,    /* WT_STATUS_REMOTE_BRANCH */
  33         GIT_COLOR_NIL,    /* WT_STATUS_ONBRANCH */
  34 };
  35
  36 static const char *color(int slot, struct wt_status *s)
  37 {
  38         const char *c = "";
  39         if (want_color(s->use_color))
  40                 c = s->color_palette[slot];
  41         if (slot == WT_STATUS_ONBRANCH && color_is_nil(c))
  42                 c = s->color_palette[WT_STATUS_HEADER];
  43         return c;
  44 }
  45
  46 static void status_vprintf(struct wt_status *s, int at_bol, const char *color,
  47                 const char *fmt, va_list ap, const char *trail)
  48 {
  49         struct strbuf sb = STRBUF_INIT;
  50         struct strbuf linebuf = STRBUF_INIT;
  51         const char *line, *eol;
  52
  53         strbuf_vaddf(&sb, fmt, ap);
  54         if (!sb.len) {
  55                 if (s->display_comment_prefix) {
  56                         strbuf_addch(&sb, comment_line_char);
  57                         if (!trail)
  58                                 strbuf_addch(&sb, ' ');
  59                 }
  60                 color_print_strbuf(s->fp, color, &sb);
  61                 if (trail)
  62                         fprintf(s->fp, "%s", trail);
  63                 strbuf_release(&sb);
  64                 return;
  65         }
  66         for (line = sb.buf; *line; line = eol + 1) {
  67                 eol = strchr(line, '\n');
  68
  69                 strbuf_reset(&linebuf);
  70                 if (at_bol && s->display_comment_prefix) {
  71                         strbuf_addch(&linebuf, comment_line_char);
  72                         if (*line != '\n' && *line != '\t')
  73                                 strbuf_addch(&linebuf, ' ');
  74                 }
  75                 if (eol)
  76                         strbuf_add(&linebuf, line, eol - line);
  77                 else
  78                         strbuf_addstr(&linebuf, line);
  79                 color_print_strbuf(s->fp, color, &linebuf);
  80                 if (eol)
  81                         fprintf(s->fp, "\n");
  82                 else
  83                         break;
  84                 at_bol = 1;
  85         }
  86         if (trail)
  87                 fprintf(s->fp, "%s", trail);
  88         strbuf_release(&linebuf);
  89         strbuf_release(&sb);
  90 }
  91
  92 void status_printf_ln(struct wt_status *s, const char *color,
  93                         const char *fmt, ...)
  94 {
  95         va_list ap;
  96
  97         va_start(ap, fmt);
  98         status_vprintf(s, 1, color, fmt, ap, "\n");
  99         va_end(ap);
 100 }
 101
 102 void status_printf(struct wt_status *s, const char *color,
 103                         const char *fmt, ...)
 104 {
 105         va_list ap;
 106
 107         va_start(ap, fmt);
 108         status_vprintf(s, 1, color, fmt, ap, NULL);
 109         va_end(ap);
 110 }
 111
 112 static void status_printf_more(struct wt_status *s, const char *color,
 113                                const char *fmt, ...)
 114 {
 115         va_list ap;
 116
 117         va_start(ap, fmt);
 118         status_vprintf(s, 0, color, fmt, ap, NULL);
 119         va_end(ap);
 120 }
 121
 122 void wt_status_prepare(struct wt_status *s)
 123 {
 124         struct object_id oid;
 125
 126         memset(s, 0, sizeof(*s));
 127         memcpy(s->color_palette, default_wt_status_colors,
 128                sizeof(default_wt_status_colors));
 129         s->show_untracked_files = SHOW_NORMAL_UNTRACKED_FILES;
 130         s->use_color = -1;
 131         s->relative_paths = 1;
 132         s->branch = resolve_refdup("HEAD", 0, oid.hash, NULL);
 133         s->reference = "HEAD";
 134         s->fp = stdout;
 135         s->index_file = get_index_file();
 136         s->change.strdup_strings = 1;
 137         s->untracked.strdup_strings = 1;
 138         s->ignored.strdup_strings = 1;
 139         s->show_branch = -1;  /* unspecified */
 140         s->show_stash = 0;
 141         s->display_comment_prefix = 0;
 142 }
 143
 144 static void wt_longstatus_print_unmerged_header(struct wt_status *s)
 145 {
 146         int i;
 147         int del_mod_conflict = 0;
 148         int both_deleted = 0;
 149         int not_deleted = 0;
 150         const char *c = color(WT_STATUS_HEADER, s);
 151
 152         status_printf_ln(s, c, _("Unmerged paths:"));
 153
 154         for (i = 0; i < s->change.nr; i++) {
 155                 struct string_list_item *it = &(s->change.items[i]);
 156                 struct wt_status_change_data *d = it->util;
 157
 158                 switch (d->stagemask) {
 159                 case 0:
 160                         break;
 161                 case 1:
 162                         both_deleted = 1;
 163                         break;
 164                 case 3:
 165                 case 5:
 166                         del_mod_conflict = 1;
 167                         break;
 168                 default:
 169                         not_deleted = 1;
 170                         break;
 171                 }
 172         }
 173
 174         if (!s->hints)
 175                 return;
 176         if (s->whence != FROM_COMMIT)
 177                 ;
 178         else if (!s->is_initial)
 179                 status_printf_ln(s, c, _("  (use \"git reset %s <file>...\" to unstage)"), s->reference);
 180         else
 181                 status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
 182
 183         if (!both_deleted) {
 184                 if (!del_mod_conflict)
 185                         status_printf_ln(s, c, _("  (use \"git add <file>...\" to mark resolution)"));
 186                 else
 187                         status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
 188         } else if (!del_mod_conflict && !not_deleted) {
 189                 status_printf_ln(s, c, _("  (use \"git rm <file>...\" to mark resolution)"));
 190         } else {
 191                 status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" as appropriate to mark resolution)"));
 192         }
 193         status_printf_ln(s, c, "%s", "");
 194 }
 195
 196 static void wt_longstatus_print_cached_header(struct wt_status *s)
 197 {
 198         const char *c = color(WT_STATUS_HEADER, s);
 199
 200         status_printf_ln(s, c, _("Changes to be committed:"));
 201         if (!s->hints)
 202                 return;
 203         if (s->whence != FROM_COMMIT)
 204                 ; /* NEEDSWORK: use "git reset --unresolve"??? */
 205         else if (!s->is_initial)
 206                 status_printf_ln(s, c, _("  (use \"git reset %s <file>...\" to unstage)"), s->reference);
 207         else
 208                 status_printf_ln(s, c, _("  (use \"git rm --cached <file>...\" to unstage)"));
 209         status_printf_ln(s, c, "%s", "");
 210 }
 211
 212 static void wt_longstatus_print_dirty_header(struct wt_status *s,
 213                                              int has_deleted,
 214                                              int has_dirty_submodules)
 215 {
 216         const char *c = color(WT_STATUS_HEADER, s);
 217
 218         status_printf_ln(s, c, _("Changes not staged for commit:"));
 219         if (!s->hints)
 220                 return;
 221         if (!has_deleted)
 222                 status_printf_ln(s, c, _("  (use \"git add <file>...\" to update what will be committed)"));
 223         else
 224                 status_printf_ln(s, c, _("  (use \"git add/rm <file>...\" to update what will be committed)"));
 225         status_printf_ln(s, c, _("  (use \"git checkout -- <file>...\" to discard changes in working directory)"));
 226         if (has_dirty_submodules)
 227                 status_printf_ln(s, c, _("  (commit or discard the untracked or modified content in submodules)"));
 228         status_printf_ln(s, c, "%s", "");
 229 }
 230
 231 static void wt_longstatus_print_other_header(struct wt_status *s,
 232                                              const char *what,
 233                                              const char *how)
 234 {
 235         const char *c = color(WT_STATUS_HEADER, s);
 236         status_printf_ln(s, c, "%s:", what);
 237         if (!s->hints)
 238                 return;
 239         status_printf_ln(s, c, _("  (use \"git %s <file>...\" to include in what will be committed)"), how);
 240         status_printf_ln(s, c, "%s", "");
 241 }
 242
 243 static void wt_longstatus_print_trailer(struct wt_status *s)
 244 {
 245         status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
 246 }
 247
 248 #define quote_path quote_path_relative
 249
 250 static const char *wt_status_unmerged_status_string(int stagemask)
 251 {
 252         switch (stagemask) {
 253         case 1:
 254                 return _("both deleted:");
 255         case 2:
 256                 return _("added by us:");
 257         case 3:
 258                 return _("deleted by them:");
 259         case 4:
 260                 return _("added by them:");
 261         case 5:
 262                 return _("deleted by us:");
 263         case 6:
 264                 return _("both added:");
 265         case 7:
 266                 return _("both modified:");
 267         default:
 268                 die("BUG: unhandled unmerged status %x", stagemask);
 269         }
 270 }
 271
 272 static const char *wt_status_diff_status_string(int status)
 273 {
 274         switch (status) {
 275         case DIFF_STATUS_ADDED:
 276                 return _("new file:");
 277         case DIFF_STATUS_COPIED:
 278                 return _("copied:");
 279         case DIFF_STATUS_DELETED:
 280                 return _("deleted:");
 281         case DIFF_STATUS_MODIFIED:
 282                 return _("modified:");
 283         case DIFF_STATUS_RENAMED:
 284                 return _("renamed:");
 285         case DIFF_STATUS_TYPE_CHANGED:
 286                 return _("typechange:");
 287         case DIFF_STATUS_UNKNOWN:
 288                 return _("unknown:");
 289         case DIFF_STATUS_UNMERGED:
 290                 return _("unmerged:");
 291         default:
 292                 return NULL;
 293         }
 294 }
 295
 296 static int maxwidth(const char *(*label)(int), int minval, int maxval)
 297 {
 298         int result = 0, i;
 299
 300         for (i = minval; i <= maxval; i++) {
 301                 const char *s = label(i);
 302                 int len = s ? utf8_strwidth(s) : 0;
 303                 if (len > result)
 304                         result = len;
 305         }
 306         return result;
 307 }
 308
 309 static void wt_longstatus_print_unmerged_data(struct wt_status *s,
 310                                               struct string_list_item *it)
 311 {
 312         const char *c = color(WT_STATUS_UNMERGED, s);
 313         struct wt_status_change_data *d = it->util;
 314         struct strbuf onebuf = STRBUF_INIT;
 315         static char *padding;
 316         static int label_width;
 317         const char *one, *how;
 318         int len;
 319
 320         if (!padding) {
 321                 label_width = maxwidth(wt_status_unmerged_status_string, 1, 7);
 322                 label_width += strlen(" ");
 323                 padding = xmallocz(label_width);
 324                 memset(padding, ' ', label_width);
 325         }
 326
 327         one = quote_path(it->string, s->prefix, &onebuf);
 328         status_printf(s, color(WT_STATUS_HEADER, s), "\t");
 329
 330         how = wt_status_unmerged_status_string(d->stagemask);
 331         len = label_width - utf8_strwidth(how);
 332         status_printf_more(s, c, "%s%.*s%s\n", how, len, padding, one);
 333         strbuf_release(&onebuf);
 334 }
 335
 336 static void wt_longstatus_print_change_data(struct wt_status *s,
 337                                             int change_type,
 338                                             struct string_list_item *it)
 339 {
 340         struct wt_status_change_data *d = it->util;
 341         const char *c = color(change_type, s);
 342         int status;
 343         char *one_name;
 344         char *two_name;
 345         const char *one, *two;
 346         struct strbuf onebuf = STRBUF_INIT, twobuf = STRBUF_INIT;
 347         struct strbuf extra = STRBUF_INIT;
 348         static char *padding;
 349         static int label_width;
 350         const char *what;
 351         int len;
 352
 353         if (!padding) {
 354                 /* If DIFF_STATUS_* uses outside the range [A..Z], we're in trouble */
 355                 label_width = maxwidth(wt_status_diff_status_string, 'A', 'Z');
 356                 label_width += strlen(" ");
 357                 padding = xmallocz(label_width);
 358                 memset(padding, ' ', label_width);
 359         }
 360
 361         one_name = two_name = it->string;
 362         switch (change_type) {
 363         case WT_STATUS_UPDATED:
 364                 status = d->index_status;
 365                 if (d->head_path)
 366                         one_name = d->head_path;
 367                 break;
 368         case WT_STATUS_CHANGED:
 369                 if (d->new_submodule_commits || d->dirty_submodule) {
 370                         strbuf_addstr(&extra, " (");
 371                         if (d->new_submodule_commits)
 372                                 strbuf_addstr(&extra, _("new commits, "));
 373                         if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 374                                 strbuf_addstr(&extra, _("modified content, "));
 375                         if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
 376                                 strbuf_addstr(&extra, _("untracked content, "));
 377                         strbuf_setlen(&extra, extra.len - 2);
 378                         strbuf_addch(&extra, ')');
 379                 }
 380                 status = d->worktree_status;
 381                 break;
 382         default:
 383                 die("BUG: unhandled change_type %d in wt_longstatus_print_change_data",
 384                     change_type);
 385         }
 386
 387         one = quote_path(one_name, s->prefix, &onebuf);
 388         two = quote_path(two_name, s->prefix, &twobuf);
 389
 390         status_printf(s, color(WT_STATUS_HEADER, s), "\t");
 391         what = wt_status_diff_status_string(status);
 392         if (!what)
 393                 die("BUG: unhandled diff status %c", status);
 394         len = label_width - utf8_strwidth(what);
 395         assert(len >= 0);
 396         if (status == DIFF_STATUS_COPIED || status == DIFF_STATUS_RENAMED)
 397                 status_printf_more(s, c, "%s%.*s%s -> %s",
 398                                    what, len, padding, one, two);
 399         else
 400                 status_printf_more(s, c, "%s%.*s%s",
 401                                    what, len, padding, one);
 402         if (extra.len) {
 403                 status_printf_more(s, color(WT_STATUS_HEADER, s), "%s", extra.buf);
 404                 strbuf_release(&extra);
 405         }
 406         status_printf_more(s, GIT_COLOR_NORMAL, "\n");
 407         strbuf_release(&onebuf);
 408         strbuf_release(&twobuf);
 409 }
 410
 411 static char short_submodule_status(struct wt_status_change_data *d) {
 412         if (d->new_submodule_commits)
 413                 return 'M';
 414         if (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
 415                 return 'm';
 416         if (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
 417                 return '?';
 418         return d->worktree_status;
 419 }
 420
 421 static void wt_status_collect_changed_cb(struct diff_queue_struct *q,
 422                                          struct diff_options *options,
 423                                          void *data)
 424 {
 425         struct wt_status *s = data;
 426         int i;
 427
 428         if (!q->nr)
 429                 return;
 430         s->workdir_dirty = 1;
 431         for (i = 0; i < q->nr; i++) {
 432                 struct diff_filepair *p;
 433                 struct string_list_item *it;
 434                 struct wt_status_change_data *d;
 435
 436                 p = q->queue[i];
 437                 it = string_list_insert(&s->change, p->one->path);
 438                 d = it->util;
 439                 if (!d) {
 440                         d = xcalloc(1, sizeof(*d));
 441                         it->util = d;
 442                 }
 443                 if (!d->worktree_status)
 444                         d->worktree_status = p->status;
 445                 if (S_ISGITLINK(p->two->mode)) {
 446                         d->dirty_submodule = p->two->dirty_submodule;
 447                         d->new_submodule_commits = !!oidcmp(&p->one->oid,
 448                                                             &p->two->oid);
 449                         if (s->status_format == STATUS_FORMAT_SHORT)
 450                                 d->worktree_status = short_submodule_status(d);
 451                 }
 452
 453                 switch (p->status) {
 454                 case DIFF_STATUS_ADDED:
 455                         d->mode_worktree = p->two->mode;
 456                         break;
 457
 458                 case DIFF_STATUS_DELETED:
 459                         d->mode_index = p->one->mode;
 460                         oidcpy(&d->oid_index, &p->one->oid);
 461                         /* mode_worktree is zero for a delete. */
 462                         break;
 463
 464                 case DIFF_STATUS_MODIFIED:
 465                 case DIFF_STATUS_TYPE_CHANGED:
 466                 case DIFF_STATUS_UNMERGED:
 467                         d->mode_index = p->one->mode;
 468                         d->mode_worktree = p->two->mode;
 469                         oidcpy(&d->oid_index, &p->one->oid);
 470                         break;
 471
 472                 case DIFF_STATUS_UNKNOWN:
 473                         die("BUG: worktree status unknown???");
 474                         break;
 475                 }
 476
 477         }
 478 }
 479
 480 static int unmerged_mask(const char *path)
 481 {
 482         int pos, mask;
 483         const struct cache_entry *ce;
 484
 485         pos = cache_name_pos(path, strlen(path));
 486         if (0 <= pos)
 487                 return 0;
 488
 489         mask = 0;
 490         pos = -pos-1;
 491         while (pos < active_nr) {
 492                 ce = active_cache[pos++];
 493                 if (strcmp(ce->name, path) || !ce_stage(ce))
 494                         break;
 495                 mask |= (1 << (ce_stage(ce) - 1));
 496         }
 497         return mask;
 498 }
 499
 500 static void wt_status_collect_updated_cb(struct diff_queue_struct *q,
 501                                          struct diff_options *options,
 502                                          void *data)
 503 {
 504         struct wt_status *s = data;
 505         int i;
 506
 507         for (i = 0; i < q->nr; i++) {
 508                 struct diff_filepair *p;
 509                 struct string_list_item *it;
 510                 struct wt_status_change_data *d;
 511
 512                 p = q->queue[i];
 513                 it = string_list_insert(&s->change, p->two->path);
 514                 d = it->util;
 515                 if (!d) {
 516                         d = xcalloc(1, sizeof(*d));
 517                         it->util = d;
 518                 }
 519                 if (!d->index_status)
 520                         d->index_status = p->status;
 521                 switch (p->status) {
 522                 case DIFF_STATUS_ADDED:
 523                         /* Leave {mode,oid}_head zero for an add. */
 524                         d->mode_index = p->two->mode;
 525                         oidcpy(&d->oid_index, &p->two->oid);
 526                         break;
 527                 case DIFF_STATUS_DELETED:
 528                         d->mode_head = p->one->mode;
 529                         oidcpy(&d->oid_head, &p->one->oid);
 530                         /* Leave {mode,oid}_index zero for a delete. */
 531                         break;
 532
 533                 case DIFF_STATUS_COPIED:
 534                 case DIFF_STATUS_RENAMED:
 535                         d->head_path = xstrdup(p->one->path);
 536                         d->score = p->score * 100 / MAX_SCORE;
 537                         /* fallthru */
 538                 case DIFF_STATUS_MODIFIED:
 539                 case DIFF_STATUS_TYPE_CHANGED:
 540                         d->mode_head = p->one->mode;
 541                         d->mode_index = p->two->mode;
 542                         oidcpy(&d->oid_head, &p->one->oid);
 543                         oidcpy(&d->oid_index, &p->two->oid);
 544                         break;
 545                 case DIFF_STATUS_UNMERGED:
 546                         d->stagemask = unmerged_mask(p->two->path);
 547                         /*
 548                          * Don't bother setting {mode,oid}_{head,index} since the print
 549                          * code will output the stage values directly and not use the
 550                          * values in these fields.
 551                          */
 552                         break;
 553                 }
 554         }
 555 }
 556
 557 static void wt_status_collect_changes_worktree(struct wt_status *s)
 558 {
 559         struct rev_info rev;
 560
 561         init_revisions(&rev, NULL);
 562         setup_revisions(0, NULL, &rev, NULL);
 563         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
 564         DIFF_OPT_SET(&rev.diffopt, DIRTY_SUBMODULES);
 565         rev.diffopt.ita_invisible_in_index = 1;
 566         if (!s->show_untracked_files)
 567                 DIFF_OPT_SET(&rev.diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
 568         if (s->ignore_submodule_arg) {
 569                 DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
 570                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
 571         }
 572         rev.diffopt.format_callback = wt_status_collect_changed_cb;
 573         rev.diffopt.format_callback_data = s;
 574         copy_pathspec(&rev.prune_data, &s->pathspec);
 575         run_diff_files(&rev, 0);
 576 }
 577
 578 static void wt_status_collect_changes_index(struct wt_status *s)
 579 {
 580         struct rev_info rev;
 581         struct setup_revision_opt opt;
 582
 583         init_revisions(&rev, NULL);
 584         memset(&opt, 0, sizeof(opt));
 585         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
 586         setup_revisions(0, NULL, &rev, &opt);
 587
 588         DIFF_OPT_SET(&rev.diffopt, OVERRIDE_SUBMODULE_CONFIG);
 589         rev.diffopt.ita_invisible_in_index = 1;
 590         if (s->ignore_submodule_arg) {
 591                 handle_ignore_submodules_arg(&rev.diffopt, s->ignore_submodule_arg);
 592         } else {
 593                 /*
 594                  * Unless the user did explicitly request a submodule ignore
 595                  * mode by passing a command line option we do not ignore any
 596                  * changed submodule SHA-1s when comparing index and HEAD, no
 597                  * matter what is configured. Otherwise the user won't be
 598                  * shown any submodules she manually added (and which are
 599                  * staged to be committed), which would be really confusing.
 600                  */
 601                 handle_ignore_submodules_arg(&rev.diffopt, "dirty");
 602         }
 603
 604         rev.diffopt.output_format |= DIFF_FORMAT_CALLBACK;
 605         rev.diffopt.format_callback = wt_status_collect_updated_cb;
 606         rev.diffopt.format_callback_data = s;
 607         rev.diffopt.detect_rename = 1;
 608         rev.diffopt.rename_limit = 200;
 609         rev.diffopt.break_opt = 0;
 610         copy_pathspec(&rev.prune_data, &s->pathspec);
 611         run_diff_index(&rev, 1);
 612 }
 613
 614 static void wt_status_collect_changes_initial(struct wt_status *s)
 615 {
 616         int i;
 617
 618         for (i = 0; i < active_nr; i++) {
 619                 struct string_list_item *it;
 620                 struct wt_status_change_data *d;
 621                 const struct cache_entry *ce = active_cache[i];
 622
 623                 if (!ce_path_match(ce, &s->pathspec, NULL))
 624                         continue;
 625                 if (ce_intent_to_add(ce))
 626                         continue;
 627                 it = string_list_insert(&s->change, ce->name);
 628                 d = it->util;
 629                 if (!d) {
 630                         d = xcalloc(1, sizeof(*d));
 631                         it->util = d;
 632                 }
 633                 if (ce_stage(ce)) {
 634                         d->index_status = DIFF_STATUS_UNMERGED;
 635                         d->stagemask |= (1 << (ce_stage(ce) - 1));
 636                         /*
 637                          * Don't bother setting {mode,oid}_{head,index} since the print
 638                          * code will output the stage values directly and not use the
 639                          * values in these fields.
 640                          */
 641                 } else {
 642                         d->index_status = DIFF_STATUS_ADDED;
 643                         /* Leave {mode,oid}_head zero for adds. */
 644                         d->mode_index = ce->ce_mode;
 645                         oidcpy(&d->oid_index, &ce->oid);
 646                 }
 647         }
 648 }
 649
 650 static void wt_status_collect_untracked(struct wt_status *s)
 651 {
 652         int i;
 653         struct dir_struct dir;
 654         uint64_t t_begin = getnanotime();
 655
 656         if (!s->show_untracked_files)
 657                 return;
 658
 659         memset(&dir, 0, sizeof(dir));
 660         if (s->show_untracked_files != SHOW_ALL_UNTRACKED_FILES)
 661                 dir.flags |=
 662                         DIR_SHOW_OTHER_DIRECTORIES | DIR_HIDE_EMPTY_DIRECTORIES;
 663         if (s->show_ignored_files)
 664                 dir.flags |= DIR_SHOW_IGNORED_TOO;
 665         else
 666                 dir.untracked = the_index.untracked;
 667         setup_standard_excludes(&dir);
 668
 669         fill_directory(&dir, &the_index, &s->pathspec);
 670
 671         for (i = 0; i < dir.nr; i++) {
 672                 struct dir_entry *ent = dir.entries[i];
 673                 if (cache_name_is_other(ent->name, ent->len) &&
 674                     dir_path_match(ent, &s->pathspec, 0, NULL))
 675                         string_list_insert(&s->untracked, ent->name);
 676                 free(ent);
 677         }
 678
 679         for (i = 0; i < dir.ignored_nr; i++) {
 680                 struct dir_entry *ent = dir.ignored[i];
 681                 if (cache_name_is_other(ent->name, ent->len) &&
 682                     dir_path_match(ent, &s->pathspec, 0, NULL))
 683                         string_list_insert(&s->ignored, ent->name);
 684                 free(ent);
 685         }
 686
 687         free(dir.entries);
 688         free(dir.ignored);
 689         clear_directory(&dir);
 690
 691         if (advice_status_u_option)
 692                 s->untracked_in_ms = (getnanotime() - t_begin) / 1000000;
 693 }
 694
 695 void wt_status_collect(struct wt_status *s)
 696 {
 697         wt_status_collect_changes_worktree(s);
 698
 699         if (s->is_initial)
 700                 wt_status_collect_changes_initial(s);
 701         else
 702                 wt_status_collect_changes_index(s);
 703         wt_status_collect_untracked(s);
 704 }
 705
 706 static void wt_longstatus_print_unmerged(struct wt_status *s)
 707 {
 708         int shown_header = 0;
 709         int i;
 710
 711         for (i = 0; i < s->change.nr; i++) {
 712                 struct wt_status_change_data *d;
 713                 struct string_list_item *it;
 714                 it = &(s->change.items[i]);
 715                 d = it->util;
 716                 if (!d->stagemask)
 717                         continue;
 718                 if (!shown_header) {
 719                         wt_longstatus_print_unmerged_header(s);
 720                         shown_header = 1;
 721                 }
 722                 wt_longstatus_print_unmerged_data(s, it);
 723         }
 724         if (shown_header)
 725                 wt_longstatus_print_trailer(s);
 726
 727 }
 728
 729 static void wt_longstatus_print_updated(struct wt_status *s)
 730 {
 731         int shown_header = 0;
 732         int i;
 733
 734         for (i = 0; i < s->change.nr; i++) {
 735                 struct wt_status_change_data *d;
 736                 struct string_list_item *it;
 737                 it = &(s->change.items[i]);
 738                 d = it->util;
 739                 if (!d->index_status ||
 740                     d->index_status == DIFF_STATUS_UNMERGED)
 741                         continue;
 742                 if (!shown_header) {
 743                         wt_longstatus_print_cached_header(s);
 744                         s->commitable = 1;
 745                         shown_header = 1;
 746                 }
 747                 wt_longstatus_print_change_data(s, WT_STATUS_UPDATED, it);
 748         }
 749         if (shown_header)
 750                 wt_longstatus_print_trailer(s);
 751 }
 752
 753 /*
 754  * -1 : has delete
 755  *  0 : no change
 756  *  1 : some change but no delete
 757  */
 758 static int wt_status_check_worktree_changes(struct wt_status *s,
 759                                              int *dirty_submodules)
 760 {
 761         int i;
 762         int changes = 0;
 763
 764         *dirty_submodules = 0;
 765
 766         for (i = 0; i < s->change.nr; i++) {
 767                 struct wt_status_change_data *d;
 768                 d = s->change.items[i].util;
 769                 if (!d->worktree_status ||
 770                     d->worktree_status == DIFF_STATUS_UNMERGED)
 771                         continue;
 772                 if (!changes)
 773                         changes = 1;
 774                 if (d->dirty_submodule)
 775                         *dirty_submodules = 1;
 776                 if (d->worktree_status == DIFF_STATUS_DELETED)
 777                         changes = -1;
 778         }
 779         return changes;
 780 }
 781
 782 static void wt_longstatus_print_changed(struct wt_status *s)
 783 {
 784         int i, dirty_submodules;
 785         int worktree_changes = wt_status_check_worktree_changes(s, &dirty_submodules);
 786
 787         if (!worktree_changes)
 788                 return;
 789
 790         wt_longstatus_print_dirty_header(s, worktree_changes < 0, dirty_submodules);
 791
 792         for (i = 0; i < s->change.nr; i++) {
 793                 struct wt_status_change_data *d;
 794                 struct string_list_item *it;
 795                 it = &(s->change.items[i]);
 796                 d = it->util;
 797                 if (!d->worktree_status ||
 798                     d->worktree_status == DIFF_STATUS_UNMERGED)
 799                         continue;
 800                 wt_longstatus_print_change_data(s, WT_STATUS_CHANGED, it);
 801         }
 802         wt_longstatus_print_trailer(s);
 803 }
 804
 805 static int stash_count_refs(struct object_id *ooid, struct object_id *noid,
 806                             const char *email, timestamp_t timestamp, int tz,
 807                             const char *message, void *cb_data)
 808 {
 809         int *c = cb_data;
 810         (*c)++;
 811         return 0;
 812 }
 813
 814 static void wt_longstatus_print_stash_summary(struct wt_status *s)
 815 {
 816         int stash_count = 0;
 817
 818         for_each_reflog_ent("refs/stash", stash_count_refs, &stash_count);
 819         if (stash_count > 0)
 820                 status_printf_ln(s, GIT_COLOR_NORMAL,
 821                                  Q_("Your stash currently has %d entry",
 822                                     "Your stash currently has %d entries", stash_count),
 823                                  stash_count);
 824 }
 825
 826 static void wt_longstatus_print_submodule_summary(struct wt_status *s, int uncommitted)
 827 {
 828         struct child_process sm_summary = CHILD_PROCESS_INIT;
 829         struct strbuf cmd_stdout = STRBUF_INIT;
 830         struct strbuf summary = STRBUF_INIT;
 831         char *summary_content;
 832
 833         argv_array_pushf(&sm_summary.env_array, "GIT_INDEX_FILE=%s",
 834                          s->index_file);
 835
 836         argv_array_push(&sm_summary.args, "submodule");
 837         argv_array_push(&sm_summary.args, "summary");
 838         argv_array_push(&sm_summary.args, uncommitted ? "--files" : "--cached");
 839         argv_array_push(&sm_summary.args, "--for-status");
 840         argv_array_push(&sm_summary.args, "--summary-limit");
 841         argv_array_pushf(&sm_summary.args, "%d", s->submodule_summary);
 842         if (!uncommitted)
 843                 argv_array_push(&sm_summary.args, s->amend ? "HEAD^" : "HEAD");
 844
 845         sm_summary.git_cmd = 1;
 846         sm_summary.no_stdin = 1;
 847
 848         capture_command(&sm_summary, &cmd_stdout, 1024);
 849
 850         /* prepend header, only if there's an actual output */
 851         if (cmd_stdout.len) {
 852                 if (uncommitted)
 853                         strbuf_addstr(&summary, _("Submodules changed but not updated:"));
 854                 else
 855                         strbuf_addstr(&summary, _("Submodule changes to be committed:"));
 856                 strbuf_addstr(&summary, "\n\n");
 857         }
 858         strbuf_addbuf(&summary, &cmd_stdout);
 859         strbuf_release(&cmd_stdout);
 860
 861         if (s->display_comment_prefix) {
 862                 size_t len;
 863                 summary_content = strbuf_detach(&summary, &len);
 864                 strbuf_add_commented_lines(&summary, summary_content, len);
 865                 free(summary_content);
 866         }
 867
 868         fputs(summary.buf, s->fp);
 869         strbuf_release(&summary);
 870 }
 871
 872 static void wt_longstatus_print_other(struct wt_status *s,
 873                                       struct string_list *l,
 874                                       const char *what,
 875                                       const char *how)
 876 {
 877         int i;
 878         struct strbuf buf = STRBUF_INIT;
 879         static struct string_list output = STRING_LIST_INIT_DUP;
 880         struct column_options copts;
 881
 882         if (!l->nr)
 883                 return;
 884
 885         wt_longstatus_print_other_header(s, what, how);
 886
 887         for (i = 0; i < l->nr; i++) {
 888                 struct string_list_item *it;
 889                 const char *path;
 890                 it = &(l->items[i]);
 891                 path = quote_path(it->string, s->prefix, &buf);
 892                 if (column_active(s->colopts)) {
 893                         string_list_append(&output, path);
 894                         continue;
 895                 }
 896                 status_printf(s, color(WT_STATUS_HEADER, s), "\t");
 897                 status_printf_more(s, color(WT_STATUS_UNTRACKED, s),
 898                                    "%s\n", path);
 899         }
 900
 901         strbuf_release(&buf);
 902         if (!column_active(s->colopts))
 903                 goto conclude;
 904
 905         strbuf_addf(&buf, "%s%s\t%s",
 906                     color(WT_STATUS_HEADER, s),
 907                     s->display_comment_prefix ? "#" : "",
 908                     color(WT_STATUS_UNTRACKED, s));
 909         memset(&copts, 0, sizeof(copts));
 910         copts.padding = 1;
 911         copts.indent = buf.buf;
 912         if (want_color(s->use_color))
 913                 copts.nl = GIT_COLOR_RESET "\n";
 914         print_columns(&output, s->colopts, &copts);
 915         string_list_clear(&output, 0);
 916         strbuf_release(&buf);
 917 conclude:
 918         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
 919 }
 920
 921 size_t wt_status_locate_end(const char *s, size_t len)
 922 {
 923         const char *p;
 924         struct strbuf pattern = STRBUF_INIT;
 925
 926         strbuf_addf(&pattern, "\n%c %s", comment_line_char, cut_line);
 927         if (starts_with(s, pattern.buf + 1))
 928                 len = 0;
 929         else if ((p = strstr(s, pattern.buf)))
 930                 len = p - s + 1;
 931         strbuf_release(&pattern);
 932         return len;
 933 }
 934
 935 void wt_status_add_cut_line(FILE *fp)
 936 {
 937         const char *explanation = _("Do not touch the line above.\nEverything below will be removed.");
 938         struct strbuf buf = STRBUF_INIT;
 939
 940         fprintf(fp, "%c %s", comment_line_char, cut_line);
 941         strbuf_add_commented_lines(&buf, explanation, strlen(explanation));
 942         fputs(buf.buf, fp);
 943         strbuf_release(&buf);
 944 }
 945
 946 static void wt_longstatus_print_verbose(struct wt_status *s)
 947 {
 948         struct rev_info rev;
 949         struct setup_revision_opt opt;
 950         int dirty_submodules;
 951         const char *c = color(WT_STATUS_HEADER, s);
 952
 953         init_revisions(&rev, NULL);
 954         DIFF_OPT_SET(&rev.diffopt, ALLOW_TEXTCONV);
 955         rev.diffopt.ita_invisible_in_index = 1;
 956
 957         memset(&opt, 0, sizeof(opt));
 958         opt.def = s->is_initial ? EMPTY_TREE_SHA1_HEX : s->reference;
 959         setup_revisions(0, NULL, &rev, &opt);
 960
 961         rev.diffopt.output_format |= DIFF_FORMAT_PATCH;
 962         rev.diffopt.detect_rename = 1;
 963         rev.diffopt.file = s->fp;
 964         rev.diffopt.close_file = 0;
 965         /*
 966          * If we're not going to stdout, then we definitely don't
 967          * want color, since we are going to the commit message
 968          * file (and even the "auto" setting won't work, since it
 969          * will have checked isatty on stdout). But we then do want
 970          * to insert the scissor line here to reliably remove the
 971          * diff before committing.
 972          */
 973         if (s->fp != stdout) {
 974                 rev.diffopt.use_color = 0;
 975                 wt_status_add_cut_line(s->fp);
 976         }
 977         if (s->verbose > 1 && s->commitable) {
 978                 /* print_updated() printed a header, so do we */
 979                 if (s->fp != stdout)
 980                         wt_longstatus_print_trailer(s);
 981                 status_printf_ln(s, c, _("Changes to be committed:"));
 982                 rev.diffopt.a_prefix = "c/";
 983                 rev.diffopt.b_prefix = "i/";
 984         } /* else use prefix as per user config */
 985         run_diff_index(&rev, 1);
 986         if (s->verbose > 1 &&
 987             wt_status_check_worktree_changes(s, &dirty_submodules)) {
 988                 status_printf_ln(s, c,
 989                         "--------------------------------------------------");
 990                 status_printf_ln(s, c, _("Changes not staged for commit:"));
 991                 setup_work_tree();
 992                 rev.diffopt.a_prefix = "i/";
 993                 rev.diffopt.b_prefix = "w/";
 994                 run_diff_files(&rev, 0);
 995         }
 996 }
 997
 998 static void wt_longstatus_print_tracking(struct wt_status *s)
 999 {
1000         struct strbuf sb = STRBUF_INIT;
1001         const char *cp, *ep, *branch_name;
1002         struct branch *branch;
1003         char comment_line_string[3];
1004         int i;
1005
1006         assert(s->branch && !s->is_initial);
1007         if (!skip_prefix(s->branch, "refs/heads/", &branch_name))
1008                 return;
1009         branch = branch_get(branch_name);
1010         if (!format_tracking_info(branch, &sb))
1011                 return;
1012
1013         i = 0;
1014         if (s->display_comment_prefix) {
1015                 comment_line_string[i++] = comment_line_char;
1016                 comment_line_string[i++] = ' ';
1017         }
1018         comment_line_string[i] = '\0';
1019
1020         for (cp = sb.buf; (ep = strchr(cp, '\n')) != NULL; cp = ep + 1)
1021                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s),
1022                                  "%s%.*s", comment_line_string,
1023                                  (int)(ep - cp), cp);
1024         if (s->display_comment_prefix)
1025                 color_fprintf_ln(s->fp, color(WT_STATUS_HEADER, s), "%c",
1026                                  comment_line_char);
1027         else
1028                 fputs("\n", s->fp);
1029 }
1030
1031 static int has_unmerged(struct wt_status *s)
1032 {
1033         int i;
1034
1035         for (i = 0; i < s->change.nr; i++) {
1036                 struct wt_status_change_data *d;
1037                 d = s->change.items[i].util;
1038                 if (d->stagemask)
1039                         return 1;
1040         }
1041         return 0;
1042 }
1043
1044 static void show_merge_in_progress(struct wt_status *s,
1045                                 struct wt_status_state *state,
1046                                 const char *color)
1047 {
1048         if (has_unmerged(s)) {
1049                 status_printf_ln(s, color, _("You have unmerged paths."));
1050                 if (s->hints) {
1051                         status_printf_ln(s, color,
1052                                          _("  (fix conflicts and run \"git commit\")"));
1053                         status_printf_ln(s, color,
1054                                          _("  (use \"git merge --abort\" to abort the merge)"));
1055                 }
1056         } else {
1057                 s-> commitable = 1;
1058                 status_printf_ln(s, color,
1059                         _("All conflicts fixed but you are still merging."));
1060                 if (s->hints)
1061                         status_printf_ln(s, color,
1062                                 _("  (use \"git commit\" to conclude merge)"));
1063         }
1064         wt_longstatus_print_trailer(s);
1065 }
1066
1067 static void show_am_in_progress(struct wt_status *s,
1068                                 struct wt_status_state *state,
1069                                 const char *color)
1070 {
1071         status_printf_ln(s, color,
1072                 _("You are in the middle of an am session."));
1073         if (state->am_empty_patch)
1074                 status_printf_ln(s, color,
1075                         _("The current patch is empty."));
1076         if (s->hints) {
1077                 if (!state->am_empty_patch)
1078                         status_printf_ln(s, color,
1079                                 _("  (fix conflicts and then run \"git am --continue\")"));
1080                 status_printf_ln(s, color,
1081                         _("  (use \"git am --skip\" to skip this patch)"));
1082                 status_printf_ln(s, color,
1083                         _("  (use \"git am --abort\" to restore the original branch)"));
1084         }
1085         wt_longstatus_print_trailer(s);
1086 }
1087
1088 static char *read_line_from_git_path(const char *filename)
1089 {
1090         struct strbuf buf = STRBUF_INIT;
1091         FILE *fp = fopen_or_warn(git_path("%s", filename), "r");
1092
1093         if (!fp) {
1094                 strbuf_release(&buf);
1095                 return NULL;
1096         }
1097         strbuf_getline_lf(&buf, fp);
1098         if (!fclose(fp)) {
1099                 return strbuf_detach(&buf, NULL);
1100         } else {
1101                 strbuf_release(&buf);
1102                 return NULL;
1103         }
1104 }
1105
1106 static int split_commit_in_progress(struct wt_status *s)
1107 {
1108         int split_in_progress = 0;
1109         char *head, *orig_head, *rebase_amend, *rebase_orig_head;
1110
1111         if ((!s->amend && !s->nowarn && !s->workdir_dirty) ||
1112             !s->branch || strcmp(s->branch, "HEAD"))
1113                 return 0;
1114
1115         head = read_line_from_git_path("HEAD");
1116         orig_head = read_line_from_git_path("ORIG_HEAD");
1117         rebase_amend = read_line_from_git_path("rebase-merge/amend");
1118         rebase_orig_head = read_line_from_git_path("rebase-merge/orig-head");
1119
1120         if (!head || !orig_head || !rebase_amend || !rebase_orig_head)
1121                 ; /* fall through, no split in progress */
1122         else if (!strcmp(rebase_amend, rebase_orig_head))
1123                 split_in_progress = !!strcmp(head, rebase_amend);
1124         else if (strcmp(orig_head, rebase_orig_head))
1125                 split_in_progress = 1;
1126
1127         free(head);
1128         free(orig_head);
1129         free(rebase_amend);
1130         free(rebase_orig_head);
1131
1132         return split_in_progress;
1133 }
1134
1135 /*
1136  * Turn
1137  * "pick d6a2f0303e897ec257dd0e0a39a5ccb709bc2047 some message"
1138  * into
1139  * "pick d6a2f03 some message"
1140  *
1141  * The function assumes that the line does not contain useless spaces
1142  * before or after the command.
1143  */
1144 static void abbrev_sha1_in_line(struct strbuf *line)
1145 {
1146         struct strbuf **split;
1147         int i;
1148
1149         if (starts_with(line->buf, "exec ") ||
1150             starts_with(line->buf, "x "))
1151                 return;
1152
1153         split = strbuf_split_max(line, ' ', 3);
1154         if (split[0] && split[1]) {
1155                 struct object_id oid;
1156
1157                 /*
1158                  * strbuf_split_max left a space. Trim it and re-add
1159                  * it after abbreviation.
1160                  */
1161                 strbuf_trim(split[1]);
1162                 if (!get_oid(split[1]->buf, &oid)) {
1163                         strbuf_reset(split[1]);
1164                         strbuf_add_unique_abbrev(split[1], oid.hash,
1165                                                  DEFAULT_ABBREV);
1166                         strbuf_addch(split[1], ' ');
1167                         strbuf_reset(line);
1168                         for (i = 0; split[i]; i++)
1169                                 strbuf_addbuf(line, split[i]);
1170                 }
1171         }
1172         strbuf_list_free(split);
1173 }
1174
1175 static int read_rebase_todolist(const char *fname, struct string_list *lines)
1176 {
1177         struct strbuf line = STRBUF_INIT;
1178         FILE *f = fopen(git_path("%s", fname), "r");
1179
1180         if (!f) {
1181                 if (errno == ENOENT)
1182                         return -1;
1183                 die_errno("Could not open file %s for reading",
1184                           git_path("%s", fname));
1185         }
1186         while (!strbuf_getline_lf(&line, f)) {
1187                 if (line.len && line.buf[0] == comment_line_char)
1188                         continue;
1189                 strbuf_trim(&line);
1190                 if (!line.len)
1191                         continue;
1192                 abbrev_sha1_in_line(&line);
1193                 string_list_append(lines, line.buf);
1194         }
1195         fclose(f);
1196         return 0;
1197 }
1198
1199 static void show_rebase_information(struct wt_status *s,
1200                                         struct wt_status_state *state,
1201                                         const char *color)
1202 {
1203         if (state->rebase_interactive_in_progress) {
1204                 int i;
1205                 int nr_lines_to_show = 2;
1206
1207                 struct string_list have_done = STRING_LIST_INIT_DUP;
1208                 struct string_list yet_to_do = STRING_LIST_INIT_DUP;
1209
1210                 read_rebase_todolist("rebase-merge/done", &have_done);
1211                 if (read_rebase_todolist("rebase-merge/git-rebase-todo",
1212                                          &yet_to_do))
1213                         status_printf_ln(s, color,
1214                                 _("git-rebase-todo is missing."));
1215                 if (have_done.nr == 0)
1216                         status_printf_ln(s, color, _("No commands done."));
1217                 else {
1218                         status_printf_ln(s, color,
1219                                 Q_("Last command done (%d command done):",
1220                                         "Last commands done (%d commands done):",
1221                                         have_done.nr),
1222                                 have_done.nr);
1223                         for (i = (have_done.nr > nr_lines_to_show)
1224                                 ? have_done.nr - nr_lines_to_show : 0;
1225                                 i < have_done.nr;
1226                                 i++)
1227                                 status_printf_ln(s, color, "   %s", have_done.items[i].string);
1228                         if (have_done.nr > nr_lines_to_show && s->hints)
1229                                 status_printf_ln(s, color,
1230                                         _("  (see more in file %s)"), git_path("rebase-merge/done"));
1231                 }
1232
1233                 if (yet_to_do.nr == 0)
1234                         status_printf_ln(s, color,
1235                                          _("No commands remaining."));
1236                 else {
1237                         status_printf_ln(s, color,
1238                                 Q_("Next command to do (%d remaining command):",
1239                                         "Next commands to do (%d remaining commands):",
1240                                         yet_to_do.nr),
1241                                 yet_to_do.nr);
1242                         for (i = 0; i < nr_lines_to_show && i < yet_to_do.nr; i++)
1243                                 status_printf_ln(s, color, "   %s", yet_to_do.items[i].string);
1244                         if (s->hints)
1245                                 status_printf_ln(s, color,
1246                                         _("  (use \"git rebase --edit-todo\" to view and edit)"));
1247                 }
1248                 string_list_clear(&yet_to_do, 0);
1249                 string_list_clear(&have_done, 0);
1250         }
1251 }
1252
1253 static void print_rebase_state(struct wt_status *s,
1254                                 struct wt_status_state *state,
1255                                 const char *color)
1256 {
1257         if (state->branch)
1258                 status_printf_ln(s, color,
1259                                  _("You are currently rebasing branch '%s' on '%s'."),
1260                                  state->branch,
1261                                  state->onto);
1262         else
1263                 status_printf_ln(s, color,
1264                                  _("You are currently rebasing."));
1265 }
1266
1267 static void show_rebase_in_progress(struct wt_status *s,
1268                                 struct wt_status_state *state,
1269                                 const char *color)
1270 {
1271         struct stat st;
1272
1273         show_rebase_information(s, state, color);
1274         if (has_unmerged(s)) {
1275                 print_rebase_state(s, state, color);
1276                 if (s->hints) {
1277                         status_printf_ln(s, color,
1278                                 _("  (fix conflicts and then run \"git rebase --continue\")"));
1279                         status_printf_ln(s, color,
1280                                 _("  (use \"git rebase --skip\" to skip this patch)"));
1281                         status_printf_ln(s, color,
1282                                 _("  (use \"git rebase --abort\" to check out the original branch)"));
1283                 }
1284         } else if (state->rebase_in_progress || !stat(git_path_merge_msg(), &st)) {
1285                 print_rebase_state(s, state, color);
1286                 if (s->hints)
1287                         status_printf_ln(s, color,
1288                                 _("  (all conflicts fixed: run \"git rebase --continue\")"));
1289         } else if (split_commit_in_progress(s)) {
1290                 if (state->branch)
1291                         status_printf_ln(s, color,
1292                                          _("You are currently splitting a commit while rebasing branch '%s' on '%s'."),
1293                                          state->branch,
1294                                          state->onto);
1295                 else
1296                         status_printf_ln(s, color,
1297                                          _("You are currently splitting a commit during a rebase."));
1298                 if (s->hints)
1299                         status_printf_ln(s, color,
1300                                 _("  (Once your working directory is clean, run \"git rebase --continue\")"));
1301         } else {
1302                 if (state->branch)
1303                         status_printf_ln(s, color,
1304                                          _("You are currently editing a commit while rebasing branch '%s' on '%s'."),
1305                                          state->branch,
1306                                          state->onto);
1307                 else
1308                         status_printf_ln(s, color,
1309                                          _("You are currently editing a commit during a rebase."));
1310                 if (s->hints && !s->amend) {
1311                         status_printf_ln(s, color,
1312                                 _("  (use \"git commit --amend\" to amend the current commit)"));
1313                         status_printf_ln(s, color,
1314                                 _("  (use \"git rebase --continue\" once you are satisfied with your changes)"));
1315                 }
1316         }
1317         wt_longstatus_print_trailer(s);
1318 }
1319
1320 static void show_cherry_pick_in_progress(struct wt_status *s,
1321                                         struct wt_status_state *state,
1322                                         const char *color)
1323 {
1324         status_printf_ln(s, color, _("You are currently cherry-picking commit %s."),
1325                         find_unique_abbrev(state->cherry_pick_head_sha1, DEFAULT_ABBREV));
1326         if (s->hints) {
1327                 if (has_unmerged(s))
1328                         status_printf_ln(s, color,
1329                                 _("  (fix conflicts and run \"git cherry-pick --continue\")"));
1330                 else
1331                         status_printf_ln(s, color,
1332                                 _("  (all conflicts fixed: run \"git cherry-pick --continue\")"));
1333                 status_printf_ln(s, color,
1334                         _("  (use \"git cherry-pick --abort\" to cancel the cherry-pick operation)"));
1335         }
1336         wt_longstatus_print_trailer(s);
1337 }
1338
1339 static void show_revert_in_progress(struct wt_status *s,
1340                                         struct wt_status_state *state,
1341                                         const char *color)
1342 {
1343         status_printf_ln(s, color, _("You are currently reverting commit %s."),
1344                          find_unique_abbrev(state->revert_head_sha1, DEFAULT_ABBREV));
1345         if (s->hints) {
1346                 if (has_unmerged(s))
1347                         status_printf_ln(s, color,
1348                                 _("  (fix conflicts and run \"git revert --continue\")"));
1349                 else
1350                         status_printf_ln(s, color,
1351                                 _("  (all conflicts fixed: run \"git revert --continue\")"));
1352                 status_printf_ln(s, color,
1353                         _("  (use \"git revert --abort\" to cancel the revert operation)"));
1354         }
1355         wt_longstatus_print_trailer(s);
1356 }
1357
1358 static void show_bisect_in_progress(struct wt_status *s,
1359                                 struct wt_status_state *state,
1360                                 const char *color)
1361 {
1362         if (state->branch)
1363                 status_printf_ln(s, color,
1364                                  _("You are currently bisecting, started from branch '%s'."),
1365                                  state->branch);
1366         else
1367                 status_printf_ln(s, color,
1368                                  _("You are currently bisecting."));
1369         if (s->hints)
1370                 status_printf_ln(s, color,
1371                         _("  (use \"git bisect reset\" to get back to the original branch)"));
1372         wt_longstatus_print_trailer(s);
1373 }
1374
1375 /*
1376  * Extract branch information from rebase/bisect
1377  */
1378 static char *get_branch(const struct worktree *wt, const char *path)
1379 {
1380         struct strbuf sb = STRBUF_INIT;
1381         struct object_id oid;
1382         const char *branch_name;
1383
1384         if (strbuf_read_file(&sb, worktree_git_path(wt, "%s", path), 0) <= 0)
1385                 goto got_nothing;
1386
1387         while (sb.len && sb.buf[sb.len - 1] == '\n')
1388                 strbuf_setlen(&sb, sb.len - 1);
1389         if (!sb.len)
1390                 goto got_nothing;
1391         if (skip_prefix(sb.buf, "refs/heads/", &branch_name))
1392                 strbuf_remove(&sb, 0, branch_name - sb.buf);
1393         else if (starts_with(sb.buf, "refs/"))
1394                 ;
1395         else if (!get_oid_hex(sb.buf, &oid)) {
1396                 strbuf_reset(&sb);
1397                 strbuf_add_unique_abbrev(&sb, oid.hash, DEFAULT_ABBREV);
1398         } else if (!strcmp(sb.buf, "detached HEAD")) /* rebase */
1399                 goto got_nothing;
1400         else                    /* bisect */
1401                 ;
1402         return strbuf_detach(&sb, NULL);
1403
1404 got_nothing:
1405         strbuf_release(&sb);
1406         return NULL;
1407 }
1408
1409 struct grab_1st_switch_cbdata {
1410         struct strbuf buf;
1411         struct object_id noid;
1412 };
1413
1414 static int grab_1st_switch(struct object_id *ooid, struct object_id *noid,
1415                            const char *email, timestamp_t timestamp, int tz,
1416                            const char *message, void *cb_data)
1417 {
1418         struct grab_1st_switch_cbdata *cb = cb_data;
1419         const char *target = NULL, *end;
1420
1421         if (!skip_prefix(message, "checkout: moving from ", &message))
1422                 return 0;
1423         target = strstr(message, " to ");
1424         if (!target)
1425                 return 0;
1426         target += strlen(" to ");
1427         strbuf_reset(&cb->buf);
1428         oidcpy(&cb->noid, noid);
1429         end = strchrnul(target, '\n');
1430         strbuf_add(&cb->buf, target, end - target);
1431         if (!strcmp(cb->buf.buf, "HEAD")) {
1432                 /* HEAD is relative. Resolve it to the right reflog entry. */
1433                 strbuf_reset(&cb->buf);
1434                 strbuf_add_unique_abbrev(&cb->buf, noid->hash, DEFAULT_ABBREV);
1435         }
1436         return 1;
1437 }
1438
1439 static void wt_status_get_detached_from(struct wt_status_state *state)
1440 {
1441         struct grab_1st_switch_cbdata cb;
1442         struct commit *commit;
1443         struct object_id oid;
1444         char *ref = NULL;
1445
1446         strbuf_init(&cb.buf, 0);
1447         if (for_each_reflog_ent_reverse("HEAD", grab_1st_switch, &cb) <= 0) {
1448                 strbuf_release(&cb.buf);
1449                 return;
1450         }
1451
1452         if (dwim_ref(cb.buf.buf, cb.buf.len, oid.hash, &ref) == 1 &&
1453             /* sha1 is a commit? match without further lookup */
1454             (!oidcmp(&cb.noid, &oid) ||
1455              /* perhaps sha1 is a tag, try to dereference to a commit */
1456              ((commit = lookup_commit_reference_gently(&oid, 1)) != NULL &&
1457               !oidcmp(&cb.noid, &commit->object.oid)))) {
1458                 const char *from = ref;
1459                 if (!skip_prefix(from, "refs/tags/", &from))
1460                         skip_prefix(from, "refs/remotes/", &from);
1461                 state->detached_from = xstrdup(from);
1462         } else
1463                 state->detached_from =
1464                         xstrdup(find_unique_abbrev(cb.noid.hash, DEFAULT_ABBREV));
1465         hashcpy(state->detached_sha1, cb.noid.hash);
1466         state->detached_at = !get_oid("HEAD", &oid) &&
1467                              !hashcmp(oid.hash, state->detached_sha1);
1468
1469         free(ref);
1470         strbuf_release(&cb.buf);
1471 }
1472
1473 int wt_status_check_rebase(const struct worktree *wt,
1474                            struct wt_status_state *state)
1475 {
1476         struct stat st;
1477
1478         if (!stat(worktree_git_path(wt, "rebase-apply"), &st)) {
1479                 if (!stat(worktree_git_path(wt, "rebase-apply/applying"), &st)) {
1480                         state->am_in_progress = 1;
1481                         if (!stat(worktree_git_path(wt, "rebase-apply/patch"), &st) && !st.st_size)
1482                                 state->am_empty_patch = 1;
1483                 } else {
1484                         state->rebase_in_progress = 1;
1485                         state->branch = get_branch(wt, "rebase-apply/head-name");
1486                         state->onto = get_branch(wt, "rebase-apply/onto");
1487                 }
1488         } else if (!stat(worktree_git_path(wt, "rebase-merge"), &st)) {
1489                 if (!stat(worktree_git_path(wt, "rebase-merge/interactive"), &st))
1490                         state->rebase_interactive_in_progress = 1;
1491                 else
1492                         state->rebase_in_progress = 1;
1493                 state->branch = get_branch(wt, "rebase-merge/head-name");
1494                 state->onto = get_branch(wt, "rebase-merge/onto");
1495         } else
1496                 return 0;
1497         return 1;
1498 }
1499
1500 int wt_status_check_bisect(const struct worktree *wt,
1501                            struct wt_status_state *state)
1502 {
1503         struct stat st;
1504
1505         if (!stat(worktree_git_path(wt, "BISECT_LOG"), &st)) {
1506                 state->bisect_in_progress = 1;
1507                 state->branch = get_branch(wt, "BISECT_START");
1508                 return 1;
1509         }
1510         return 0;
1511 }
1512
1513 void wt_status_get_state(struct wt_status_state *state,
1514                          int get_detached_from)
1515 {
1516         struct stat st;
1517         struct object_id oid;
1518
1519         if (!stat(git_path_merge_head(), &st)) {
1520                 state->merge_in_progress = 1;
1521         } else if (wt_status_check_rebase(NULL, state)) {
1522                 ;               /* all set */
1523         } else if (!stat(git_path_cherry_pick_head(), &st) &&
1524                         !get_oid("CHERRY_PICK_HEAD", &oid)) {
1525                 state->cherry_pick_in_progress = 1;
1526                 hashcpy(state->cherry_pick_head_sha1, oid.hash);
1527         }
1528         wt_status_check_bisect(NULL, state);
1529         if (!stat(git_path_revert_head(), &st) &&
1530             !get_oid("REVERT_HEAD", &oid)) {
1531                 state->revert_in_progress = 1;
1532                 hashcpy(state->revert_head_sha1, oid.hash);
1533         }
1534
1535         if (get_detached_from)
1536                 wt_status_get_detached_from(state);
1537 }
1538
1539 static void wt_longstatus_print_state(struct wt_status *s,
1540                                       struct wt_status_state *state)
1541 {
1542         const char *state_color = color(WT_STATUS_HEADER, s);
1543         if (state->merge_in_progress)
1544                 show_merge_in_progress(s, state, state_color);
1545         else if (state->am_in_progress)
1546                 show_am_in_progress(s, state, state_color);
1547         else if (state->rebase_in_progress || state->rebase_interactive_in_progress)
1548                 show_rebase_in_progress(s, state, state_color);
1549         else if (state->cherry_pick_in_progress)
1550                 show_cherry_pick_in_progress(s, state, state_color);
1551         else if (state->revert_in_progress)
1552                 show_revert_in_progress(s, state, state_color);
1553         if (state->bisect_in_progress)
1554                 show_bisect_in_progress(s, state, state_color);
1555 }
1556
1557 static void wt_longstatus_print(struct wt_status *s)
1558 {
1559         const char *branch_color = color(WT_STATUS_ONBRANCH, s);
1560         const char *branch_status_color = color(WT_STATUS_HEADER, s);
1561         struct wt_status_state state;
1562
1563         memset(&state, 0, sizeof(state));
1564         wt_status_get_state(&state,
1565                             s->branch && !strcmp(s->branch, "HEAD"));
1566
1567         if (s->branch) {
1568                 const char *on_what = _("On branch ");
1569                 const char *branch_name = s->branch;
1570                 if (!strcmp(branch_name, "HEAD")) {
1571                         branch_status_color = color(WT_STATUS_NOBRANCH, s);
1572                         if (state.rebase_in_progress || state.rebase_interactive_in_progress) {
1573                                 if (state.rebase_interactive_in_progress)
1574                                         on_what = _("interactive rebase in progress; onto ");
1575                                 else
1576                                         on_what = _("rebase in progress; onto ");
1577                                 branch_name = state.onto;
1578                         } else if (state.detached_from) {
1579                                 branch_name = state.detached_from;
1580                                 if (state.detached_at)
1581                                         on_what = _("HEAD detached at ");
1582                                 else
1583                                         on_what = _("HEAD detached from ");
1584                         } else {
1585                                 branch_name = "";
1586                                 on_what = _("Not currently on any branch.");
1587                         }
1588                 } else
1589                         skip_prefix(branch_name, "refs/heads/", &branch_name);
1590                 status_printf(s, color(WT_STATUS_HEADER, s), "%s", "");
1591                 status_printf_more(s, branch_status_color, "%s", on_what);
1592                 status_printf_more(s, branch_color, "%s\n", branch_name);
1593                 if (!s->is_initial)
1594                         wt_longstatus_print_tracking(s);
1595         }
1596
1597         wt_longstatus_print_state(s, &state);
1598         free(state.branch);
1599         free(state.onto);
1600         free(state.detached_from);
1601
1602         if (s->is_initial) {
1603                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1604                 status_printf_ln(s, color(WT_STATUS_HEADER, s), _("Initial commit"));
1605                 status_printf_ln(s, color(WT_STATUS_HEADER, s), "%s", "");
1606         }
1607
1608         wt_longstatus_print_updated(s);
1609         wt_longstatus_print_unmerged(s);
1610         wt_longstatus_print_changed(s);
1611         if (s->submodule_summary &&
1612             (!s->ignore_submodule_arg ||
1613              strcmp(s->ignore_submodule_arg, "all"))) {
1614                 wt_longstatus_print_submodule_summary(s, 0);  /* staged */
1615                 wt_longstatus_print_submodule_summary(s, 1);  /* unstaged */
1616         }
1617         if (s->show_untracked_files) {
1618                 wt_longstatus_print_other(s, &s->untracked, _("Untracked files"), "add");
1619                 if (s->show_ignored_files)
1620                         wt_longstatus_print_other(s, &s->ignored, _("Ignored files"), "add -f");
1621                 if (advice_status_u_option && 2000 < s->untracked_in_ms) {
1622                         status_printf_ln(s, GIT_COLOR_NORMAL, "%s", "");
1623                         status_printf_ln(s, GIT_COLOR_NORMAL,
1624                                          _("It took %.2f seconds to enumerate untracked files. 'status -uno'\n"
1625                                            "may speed it up, but you have to be careful not to forget to add\n"
1626                                            "new files yourself (see 'git help status')."),
1627                                          s->untracked_in_ms / 1000.0);
1628                 }
1629         } else if (s->commitable)
1630                 status_printf_ln(s, GIT_COLOR_NORMAL, _("Untracked files not listed%s"),
1631                         s->hints
1632                         ? _(" (use -u option to show untracked files)") : "");
1633
1634         if (s->verbose)
1635                 wt_longstatus_print_verbose(s);
1636         if (!s->commitable) {
1637                 if (s->amend)
1638                         status_printf_ln(s, GIT_COLOR_NORMAL, _("No changes"));
1639                 else if (s->nowarn)
1640                         ; /* nothing */
1641                 else if (s->workdir_dirty) {
1642                         if (s->hints)
1643                                 printf(_("no changes added to commit "
1644                                          "(use \"git add\" and/or \"git commit -a\")\n"));
1645                         else
1646                                 printf(_("no changes added to commit\n"));
1647                 } else if (s->untracked.nr) {
1648                         if (s->hints)
1649                                 printf(_("nothing added to commit but untracked files "
1650                                          "present (use \"git add\" to track)\n"));
1651                         else
1652                                 printf(_("nothing added to commit but untracked files present\n"));
1653                 } else if (s->is_initial) {
1654                         if (s->hints)
1655                                 printf(_("nothing to commit (create/copy files "
1656                                          "and use \"git add\" to track)\n"));
1657                         else
1658                                 printf(_("nothing to commit\n"));
1659                 } else if (!s->show_untracked_files) {
1660                         if (s->hints)
1661                                 printf(_("nothing to commit (use -u to show untracked files)\n"));
1662                         else
1663                                 printf(_("nothing to commit\n"));
1664                 } else
1665                         printf(_("nothing to commit, working tree clean\n"));
1666         }
1667         if(s->show_stash)
1668                 wt_longstatus_print_stash_summary(s);
1669 }
1670
1671 static void wt_shortstatus_unmerged(struct string_list_item *it,
1672                            struct wt_status *s)
1673 {
1674         struct wt_status_change_data *d = it->util;
1675         const char *how = "??";
1676
1677         switch (d->stagemask) {
1678         case 1: how = "DD"; break; /* both deleted */
1679         case 2: how = "AU"; break; /* added by us */
1680         case 3: how = "UD"; break; /* deleted by them */
1681         case 4: how = "UA"; break; /* added by them */
1682         case 5: how = "DU"; break; /* deleted by us */
1683         case 6: how = "AA"; break; /* both added */
1684         case 7: how = "UU"; break; /* both modified */
1685         }
1686         color_fprintf(s->fp, color(WT_STATUS_UNMERGED, s), "%s", how);
1687         if (s->null_termination) {
1688                 fprintf(stdout, " %s%c", it->string, 0);
1689         } else {
1690                 struct strbuf onebuf = STRBUF_INIT;
1691                 const char *one;
1692                 one = quote_path(it->string, s->prefix, &onebuf);
1693                 printf(" %s\n", one);
1694                 strbuf_release(&onebuf);
1695         }
1696 }
1697
1698 static void wt_shortstatus_status(struct string_list_item *it,
1699                          struct wt_status *s)
1700 {
1701         struct wt_status_change_data *d = it->util;
1702
1703         if (d->index_status)
1704                 color_fprintf(s->fp, color(WT_STATUS_UPDATED, s), "%c", d->index_status);
1705         else
1706                 putchar(' ');
1707         if (d->worktree_status)
1708                 color_fprintf(s->fp, color(WT_STATUS_CHANGED, s), "%c", d->worktree_status);
1709         else
1710                 putchar(' ');
1711         putchar(' ');
1712         if (s->null_termination) {
1713                 fprintf(stdout, "%s%c", it->string, 0);
1714                 if (d->head_path)
1715                         fprintf(stdout, "%s%c", d->head_path, 0);
1716         } else {
1717                 struct strbuf onebuf = STRBUF_INIT;
1718                 const char *one;
1719                 if (d->head_path) {
1720                         one = quote_path(d->head_path, s->prefix, &onebuf);
1721                         if (*one != '"' && strchr(one, ' ') != NULL) {
1722                                 putchar('"');
1723                                 strbuf_addch(&onebuf, '"');
1724                                 one = onebuf.buf;
1725                         }
1726                         printf("%s -> ", one);
1727                         strbuf_release(&onebuf);
1728                 }
1729                 one = quote_path(it->string, s->prefix, &onebuf);
1730                 if (*one != '"' && strchr(one, ' ') != NULL) {
1731                         putchar('"');
1732                         strbuf_addch(&onebuf, '"');
1733                         one = onebuf.buf;
1734                 }
1735                 printf("%s\n", one);
1736                 strbuf_release(&onebuf);
1737         }
1738 }
1739
1740 static void wt_shortstatus_other(struct string_list_item *it,
1741                                  struct wt_status *s, const char *sign)
1742 {
1743         if (s->null_termination) {
1744                 fprintf(stdout, "%s %s%c", sign, it->string, 0);
1745         } else {
1746                 struct strbuf onebuf = STRBUF_INIT;
1747                 const char *one;
1748                 one = quote_path(it->string, s->prefix, &onebuf);
1749                 color_fprintf(s->fp, color(WT_STATUS_UNTRACKED, s), "%s", sign);
1750                 printf(" %s\n", one);
1751                 strbuf_release(&onebuf);
1752         }
1753 }
1754
1755 static void wt_shortstatus_print_tracking(struct wt_status *s)
1756 {
1757         struct branch *branch;
1758         const char *header_color = color(WT_STATUS_HEADER, s);
1759         const char *branch_color_local = color(WT_STATUS_LOCAL_BRANCH, s);
1760         const char *branch_color_remote = color(WT_STATUS_REMOTE_BRANCH, s);
1761
1762         const char *base;
1763         const char *branch_name;
1764         int num_ours, num_theirs;
1765         int upstream_is_gone = 0;
1766
1767         color_fprintf(s->fp, color(WT_STATUS_HEADER, s), "## ");
1768
1769         if (!s->branch)
1770                 return;
1771         branch_name = s->branch;
1772
1773 #define LABEL(string) (s->no_gettext ? (string) : _(string))
1774
1775         if (s->is_initial)
1776                 color_fprintf(s->fp, header_color, LABEL(N_("Initial commit on ")));
1777
1778         if (!strcmp(s->branch, "HEAD")) {
1779                 color_fprintf(s->fp, color(WT_STATUS_NOBRANCH, s), "%s",
1780                               LABEL(N_("HEAD (no branch)")));
1781                 goto conclude;
1782         }
1783
1784         skip_prefix(branch_name, "refs/heads/", &branch_name);
1785
1786         branch = branch_get(branch_name);
1787
1788         color_fprintf(s->fp, branch_color_local, "%s", branch_name);
1789
1790         if (stat_tracking_info(branch, &num_ours, &num_theirs, &base) < 0) {
1791                 if (!base)
1792                         goto conclude;
1793
1794                 upstream_is_gone = 1;
1795         }
1796
1797         base = shorten_unambiguous_ref(base, 0);
1798         color_fprintf(s->fp, header_color, "...");
1799         color_fprintf(s->fp, branch_color_remote, "%s", base);
1800         free((char *)base);
1801
1802         if (!upstream_is_gone && !num_ours && !num_theirs)
1803                 goto conclude;
1804
1805         color_fprintf(s->fp, header_color, " [");
1806         if (upstream_is_gone) {
1807                 color_fprintf(s->fp, header_color, LABEL(N_("gone")));
1808         } else if (!num_ours) {
1809                 color_fprintf(s->fp, header_color, LABEL(N_("behind ")));
1810                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1811         } else if (!num_theirs) {
1812                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1813                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1814         } else {
1815                 color_fprintf(s->fp, header_color, LABEL(N_("ahead ")));
1816                 color_fprintf(s->fp, branch_color_local, "%d", num_ours);
1817                 color_fprintf(s->fp, header_color, ", %s", LABEL(N_("behind ")));
1818                 color_fprintf(s->fp, branch_color_remote, "%d", num_theirs);
1819         }
1820
1821         color_fprintf(s->fp, header_color, "]");
1822  conclude:
1823         fputc(s->null_termination ? '\0' : '\n', s->fp);
1824 }
1825
1826 static void wt_shortstatus_print(struct wt_status *s)
1827 {
1828         struct string_list_item *it;
1829
1830         if (s->show_branch)
1831                 wt_shortstatus_print_tracking(s);
1832
1833         for_each_string_list_item(it, &s->change) {
1834                 struct wt_status_change_data *d = it->util;
1835
1836                 if (d->stagemask)
1837                         wt_shortstatus_unmerged(it, s);
1838                 else
1839                         wt_shortstatus_status(it, s);
1840         }
1841         for_each_string_list_item(it, &s->untracked)
1842                 wt_shortstatus_other(it, s, "??");
1843
1844         for_each_string_list_item(it, &s->ignored)
1845                 wt_shortstatus_other(it, s, "!!");
1846 }
1847
1848 static void wt_porcelain_print(struct wt_status *s)
1849 {
1850         s->use_color = 0;
1851         s->relative_paths = 0;
1852         s->prefix = NULL;
1853         s->no_gettext = 1;
1854         wt_shortstatus_print(s);
1855 }
1856
1857 /*
1858  * Print branch information for porcelain v2 output.  These lines
1859  * are printed when the '--branch' parameter is given.
1860  *
1861  *    # branch.oid <commit><eol>
1862  *    # branch.head <head><eol>
1863  *   [# branch.upstream <upstream><eol>
1864  *   [# branch.ab +<ahead> -<behind><eol>]]
1865  *
1866  *      <commit> ::= the current commit hash or the the literal
1867  *                   "(initial)" to indicate an initialized repo
1868  *                   with no commits.
1869  *
1870  *        <head> ::= <branch_name> the current branch name or
1871  *                   "(detached)" literal when detached head or
1872  *                   "(unknown)" when something is wrong.
1873  *
1874  *    <upstream> ::= the upstream branch name, when set.
1875  *
1876  *       <ahead> ::= integer ahead value, when upstream set
1877  *                   and the commit is present (not gone).
1878  *
1879  *      <behind> ::= integer behind value, when upstream set
1880  *                   and commit is present.
1881  *
1882  *
1883  * The end-of-line is defined by the -z flag.
1884  *
1885  *                 <eol> ::= NUL when -z,
1886  *                           LF when NOT -z.
1887  *
1888  */
1889 static void wt_porcelain_v2_print_tracking(struct wt_status *s)
1890 {
1891         struct branch *branch;
1892         const char *base;
1893         const char *branch_name;
1894         struct wt_status_state state;
1895         int ab_info, nr_ahead, nr_behind;
1896         char eol = s->null_termination ? '\0' : '\n';
1897
1898         memset(&state, 0, sizeof(state));
1899         wt_status_get_state(&state, s->branch && !strcmp(s->branch, "HEAD"));
1900
1901         fprintf(s->fp, "# branch.oid %s%c",
1902                         (s->is_initial ? "(initial)" : sha1_to_hex(s->sha1_commit)),
1903                         eol);
1904
1905         if (!s->branch)
1906                 fprintf(s->fp, "# branch.head %s%c", "(unknown)", eol);
1907         else {
1908                 if (!strcmp(s->branch, "HEAD")) {
1909                         fprintf(s->fp, "# branch.head %s%c", "(detached)", eol);
1910
1911                         if (state.rebase_in_progress || state.rebase_interactive_in_progress)
1912                                 branch_name = state.onto;
1913                         else if (state.detached_from)
1914                                 branch_name = state.detached_from;
1915                         else
1916                                 branch_name = "";
1917                 } else {
1918                         branch_name = NULL;
1919                         skip_prefix(s->branch, "refs/heads/", &branch_name);
1920
1921                         fprintf(s->fp, "# branch.head %s%c", branch_name, eol);
1922                 }
1923
1924                 /* Lookup stats on the upstream tracking branch, if set. */
1925                 branch = branch_get(branch_name);
1926                 base = NULL;
1927                 ab_info = (stat_tracking_info(branch, &nr_ahead, &nr_behind, &base) == 0);
1928                 if (base) {
1929                         base = shorten_unambiguous_ref(base, 0);
1930                         fprintf(s->fp, "# branch.upstream %s%c", base, eol);
1931                         free((char *)base);
1932
1933                         if (ab_info)
1934                                 fprintf(s->fp, "# branch.ab +%d -%d%c", nr_ahead, nr_behind, eol);
1935                 }
1936         }
1937
1938         free(state.branch);
1939         free(state.onto);
1940         free(state.detached_from);
1941 }
1942
1943 /*
1944  * Convert various submodule status values into a
1945  * fixed-length string of characters in the buffer provided.
1946  */
1947 static void wt_porcelain_v2_submodule_state(
1948         struct wt_status_change_data *d,
1949         char sub[5])
1950 {
1951         if (S_ISGITLINK(d->mode_head) ||
1952                 S_ISGITLINK(d->mode_index) ||
1953                 S_ISGITLINK(d->mode_worktree)) {
1954                 sub[0] = 'S';
1955                 sub[1] = d->new_submodule_commits ? 'C' : '.';
1956                 sub[2] = (d->dirty_submodule & DIRTY_SUBMODULE_MODIFIED) ? 'M' : '.';
1957                 sub[3] = (d->dirty_submodule & DIRTY_SUBMODULE_UNTRACKED) ? 'U' : '.';
1958         } else {
1959                 sub[0] = 'N';
1960                 sub[1] = '.';
1961                 sub[2] = '.';
1962                 sub[3] = '.';
1963         }
1964         sub[4] = 0;
1965 }
1966
1967 /*
1968  * Fix-up changed entries before we print them.
1969  */
1970 static void wt_porcelain_v2_fix_up_changed(
1971         struct string_list_item *it,
1972         struct wt_status *s)
1973 {
1974         struct wt_status_change_data *d = it->util;
1975
1976         if (!d->index_status) {
1977                 /*
1978                  * This entry is unchanged in the index (relative to the head).
1979                  * Therefore, the collect_updated_cb was never called for this
1980                  * entry (during the head-vs-index scan) and so the head column
1981                  * fields were never set.
1982                  *
1983                  * We must have data for the index column (from the
1984                  * index-vs-worktree scan (otherwise, this entry should not be
1985                  * in the list of changes)).
1986                  *
1987                  * Copy index column fields to the head column, so that our
1988                  * output looks complete.
1989                  */
1990                 assert(d->mode_head == 0);
1991                 d->mode_head = d->mode_index;
1992                 oidcpy(&d->oid_head, &d->oid_index);
1993         }
1994
1995         if (!d->worktree_status) {
1996                 /*
1997                  * This entry is unchanged in the worktree (relative to the index).
1998                  * Therefore, the collect_changed_cb was never called for this entry
1999                  * (during the index-vs-worktree scan) and so the worktree column
2000                  * fields were never set.
2001                  *
2002                  * We must have data for the index column (from the head-vs-index
2003                  * scan).
2004                  *
2005                  * Copy the index column fields to the worktree column so that
2006                  * our output looks complete.
2007                  *
2008                  * Note that we only have a mode field in the worktree column
2009                  * because the scan code tries really hard to not have to compute it.
2010                  */
2011                 assert(d->mode_worktree == 0);
2012                 d->mode_worktree = d->mode_index;
2013         }
2014 }
2015
2016 /*
2017  * Print porcelain v2 info for tracked entries with changes.
2018  */
2019 static void wt_porcelain_v2_print_changed_entry(
2020         struct string_list_item *it,
2021         struct wt_status *s)
2022 {
2023         struct wt_status_change_data *d = it->util;
2024         struct strbuf buf_index = STRBUF_INIT;
2025         struct strbuf buf_head = STRBUF_INIT;
2026         const char *path_index = NULL;
2027         const char *path_head = NULL;
2028         char key[3];
2029         char submodule_token[5];
2030         char sep_char, eol_char;
2031
2032         wt_porcelain_v2_fix_up_changed(it, s);
2033         wt_porcelain_v2_submodule_state(d, submodule_token);
2034
2035         key[0] = d->index_status ? d->index_status : '.';
2036         key[1] = d->worktree_status ? d->worktree_status : '.';
2037         key[2] = 0;
2038
2039         if (s->null_termination) {
2040                 /*
2041                  * In -z mode, we DO NOT C-quote pathnames.  Current path is ALWAYS first.
2042                  * A single NUL character separates them.
2043                  */
2044                 sep_char = '\0';
2045                 eol_char = '\0';
2046                 path_index = it->string;
2047                 path_head = d->head_path;
2048         } else {
2049                 /*
2050                  * Path(s) are C-quoted if necessary. Current path is ALWAYS first.
2051                  * The source path is only present when necessary.
2052                  * A single TAB separates them (because paths can contain spaces
2053                  * which are not escaped and C-quoting does escape TAB characters).
2054                  */
2055                 sep_char = '\t';
2056                 eol_char = '\n';
2057                 path_index = quote_path(it->string, s->prefix, &buf_index);
2058                 if (d->head_path)
2059                         path_head = quote_path(d->head_path, s->prefix, &buf_head);
2060         }
2061
2062         if (path_head)
2063                 fprintf(s->fp, "2 %s %s %06o %06o %06o %s %s %c%d %s%c%s%c",
2064                                 key, submodule_token,
2065                                 d->mode_head, d->mode_index, d->mode_worktree,
2066                                 oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
2067                                 key[0], d->score,
2068                                 path_index, sep_char, path_head, eol_char);
2069         else
2070                 fprintf(s->fp, "1 %s %s %06o %06o %06o %s %s %s%c",
2071                                 key, submodule_token,
2072                                 d->mode_head, d->mode_index, d->mode_worktree,
2073                                 oid_to_hex(&d->oid_head), oid_to_hex(&d->oid_index),
2074                                 path_index, eol_char);
2075
2076         strbuf_release(&buf_index);
2077         strbuf_release(&buf_head);
2078 }
2079
2080 /*
2081  * Print porcelain v2 status info for unmerged entries.
2082  */
2083 static void wt_porcelain_v2_print_unmerged_entry(
2084         struct string_list_item *it,
2085         struct wt_status *s)
2086 {
2087         struct wt_status_change_data *d = it->util;
2088         const struct cache_entry *ce;
2089         struct strbuf buf_index = STRBUF_INIT;
2090         const char *path_index = NULL;
2091         int pos, stage, sum;
2092         struct {
2093                 int mode;
2094                 struct object_id oid;
2095         } stages[3];
2096         char *key;
2097         char submodule_token[5];
2098         char unmerged_prefix = 'u';
2099         char eol_char = s->null_termination ? '\0' : '\n';
2100
2101         wt_porcelain_v2_submodule_state(d, submodule_token);
2102
2103         switch (d->stagemask) {
2104         case 1: key = "DD"; break; /* both deleted */
2105         case 2: key = "AU"; break; /* added by us */
2106         case 3: key = "UD"; break; /* deleted by them */
2107         case 4: key = "UA"; break; /* added by them */
2108         case 5: key = "DU"; break; /* deleted by us */
2109         case 6: key = "AA"; break; /* both added */
2110         case 7: key = "UU"; break; /* both modified */
2111         default:
2112                 die("BUG: unhandled unmerged status %x", d->stagemask);
2113         }
2114
2115         /*
2116          * Disregard d.aux.porcelain_v2 data that we accumulated
2117          * for the head and index columns during the scans and
2118          * replace with the actual stage data.
2119          *
2120          * Note that this is a last-one-wins for each the individual
2121          * stage [123] columns in the event of multiple cache entries
2122          * for same stage.
2123          */
2124         memset(stages, 0, sizeof(stages));
2125         sum = 0;
2126         pos = cache_name_pos(it->string, strlen(it->string));
2127         assert(pos < 0);
2128         pos = -pos-1;
2129         while (pos < active_nr) {
2130                 ce = active_cache[pos++];
2131                 stage = ce_stage(ce);
2132                 if (strcmp(ce->name, it->string) || !stage)
2133                         break;
2134                 stages[stage - 1].mode = ce->ce_mode;
2135                 oidcpy(&stages[stage - 1].oid, &ce->oid);
2136                 sum |= (1 << (stage - 1));
2137         }
2138         if (sum != d->stagemask)
2139                 die("BUG: observed stagemask 0x%x != expected stagemask 0x%x", sum, d->stagemask);
2140
2141         if (s->null_termination)
2142                 path_index = it->string;
2143         else
2144                 path_index = quote_path(it->string, s->prefix, &buf_index);
2145
2146         fprintf(s->fp, "%c %s %s %06o %06o %06o %06o %s %s %s %s%c",
2147                         unmerged_prefix, key, submodule_token,
2148                         stages[0].mode, /* stage 1 */
2149                         stages[1].mode, /* stage 2 */
2150                         stages[2].mode, /* stage 3 */
2151                         d->mode_worktree,
2152                         oid_to_hex(&stages[0].oid), /* stage 1 */
2153                         oid_to_hex(&stages[1].oid), /* stage 2 */
2154                         oid_to_hex(&stages[2].oid), /* stage 3 */
2155                         path_index,
2156                         eol_char);
2157
2158         strbuf_release(&buf_index);
2159 }
2160
2161 /*
2162  * Print porcelain V2 status info for untracked and ignored entries.
2163  */
2164 static void wt_porcelain_v2_print_other(
2165         struct string_list_item *it,
2166         struct wt_status *s,
2167         char prefix)
2168 {
2169         struct strbuf buf = STRBUF_INIT;
2170         const char *path;
2171         char eol_char;
2172
2173         if (s->null_termination) {
2174                 path = it->string;
2175                 eol_char = '\0';
2176         } else {
2177                 path = quote_path(it->string, s->prefix, &buf);
2178                 eol_char = '\n';
2179         }
2180
2181         fprintf(s->fp, "%c %s%c", prefix, path, eol_char);
2182
2183         strbuf_release(&buf);
2184 }
2185
2186 /*
2187  * Print porcelain V2 status.
2188  *
2189  * [<v2_branch>]
2190  * [<v2_changed_items>]*
2191  * [<v2_unmerged_items>]*
2192  * [<v2_untracked_items>]*
2193  * [<v2_ignored_items>]*
2194  *
2195  */
2196 static void wt_porcelain_v2_print(struct wt_status *s)
2197 {
2198         struct wt_status_change_data *d;
2199         struct string_list_item *it;
2200         int i;
2201
2202         if (s->show_branch)
2203                 wt_porcelain_v2_print_tracking(s);
2204
2205         for (i = 0; i < s->change.nr; i++) {
2206                 it = &(s->change.items[i]);
2207                 d = it->util;
2208                 if (!d->stagemask)
2209                         wt_porcelain_v2_print_changed_entry(it, s);
2210         }
2211
2212         for (i = 0; i < s->change.nr; i++) {
2213                 it = &(s->change.items[i]);
2214                 d = it->util;
2215                 if (d->stagemask)
2216                         wt_porcelain_v2_print_unmerged_entry(it, s);
2217         }
2218
2219         for (i = 0; i < s->untracked.nr; i++) {
2220                 it = &(s->untracked.items[i]);
2221                 wt_porcelain_v2_print_other(it, s, '?');
2222         }
2223
2224         for (i = 0; i < s->ignored.nr; i++) {
2225                 it = &(s->ignored.items[i]);
2226                 wt_porcelain_v2_print_other(it, s, '!');
2227         }
2228 }
2229
2230 void wt_status_print(struct wt_status *s)
2231 {
2232         switch (s->status_format) {
2233         case STATUS_FORMAT_SHORT:
2234                 wt_shortstatus_print(s);
2235                 break;
2236         case STATUS_FORMAT_PORCELAIN:
2237                 wt_porcelain_print(s);
2238                 break;
2239         case STATUS_FORMAT_PORCELAIN_V2:
2240                 wt_porcelain_v2_print(s);
2241                 break;
2242         case STATUS_FORMAT_UNSPECIFIED:
2243                 die("BUG: finalize_deferred_config() should have been called");
2244                 break;
2245         case STATUS_FORMAT_NONE:
2246         case STATUS_FORMAT_LONG:
2247                 wt_longstatus_print(s);
2248                 break;
2249         }
2250 }
2251
2252 /**
2253  * Returns 1 if there are unstaged changes, 0 otherwise.
2254  */
2255 int has_unstaged_changes(int ignore_submodules)
2256 {
2257         struct rev_info rev_info;
2258         int result;
2259
2260         init_revisions(&rev_info, NULL);
2261         if (ignore_submodules)
2262                 DIFF_OPT_SET(&rev_info.diffopt, IGNORE_SUBMODULES);
2263         DIFF_OPT_SET(&rev_info.diffopt, QUICK);
2264         diff_setup_done(&rev_info.diffopt);
2265         result = run_diff_files(&rev_info, 0);
2266         return diff_result_code(&rev_info.diffopt, result);
2267 }
2268
2269 /**
2270  * Returns 1 if there are uncommitted changes, 0 otherwise.
2271  */
2272 int has_uncommitted_changes(int ignore_submodules)
2273 {
2274         struct rev_info rev_info;
2275         int result;
2276
2277         if (is_cache_unborn())
2278                 return 0;
2279
2280         init_revisions(&rev_info, NULL);
2281         if (ignore_submodules)
2282                 DIFF_OPT_SET(&rev_info.diffopt, IGNORE_SUBMODULES);
2283         DIFF_OPT_SET(&rev_info.diffopt, QUICK);
2284         add_head_to_pending(&rev_info);
2285         diff_setup_done(&rev_info.diffopt);
2286         result = run_diff_index(&rev_info, 1);
2287         return diff_result_code(&rev_info.diffopt, result);
2288 }
2289
2290 /**
2291  * If the work tree has unstaged or uncommitted changes, dies with the
2292  * appropriate message.
2293  */
2294 int require_clean_work_tree(const char *action, const char *hint, int ignore_submodules, int gently)
2295 {
2296         struct lock_file *lock_file = xcalloc(1, sizeof(*lock_file));
2297         int err = 0, fd;
2298
2299         fd = hold_locked_index(lock_file, 0);
2300         refresh_cache(REFRESH_QUIET);
2301         if (0 <= fd)
2302                 update_index_if_able(&the_index, lock_file);
2303         rollback_lock_file(lock_file);
2304
2305         if (has_unstaged_changes(ignore_submodules)) {
2306                 /* TRANSLATORS: the action is e.g. "pull with rebase" */
2307                 error(_("cannot %s: You have unstaged changes."), _(action));
2308                 err = 1;
2309         }
2310
2311         if (has_uncommitted_changes(ignore_submodules)) {
2312                 if (err)
2313                         error(_("additionally, your index contains uncommitted changes."));
2314                 else
2315                         error(_("cannot %s: Your index contains uncommitted changes."),
2316                               _(action));
2317                 err = 1;
2318         }
2319
2320         if (err) {
2321                 if (hint)
2322                         error("%s", hint);
2323                 if (!gently)
2324                         exit(128);
2325         }
2326
2327         return err;
2328 }