builtin/fast-export.c

   1 /*
   2  * "git fast-export" builtin command
   3  *
   4  * Copyright (C) 2007 Johannes E. Schindelin
   5  */
   6 #include "builtin.h"
   7 #include "cache.h"
   8 #include "commit.h"
   9 #include "object.h"
  10 #include "tag.h"
  11 #include "diff.h"
  12 #include "diffcore.h"
  13 #include "log-tree.h"
  14 #include "revision.h"
  15 #include "decorate.h"
  16 #include "string-list.h"
  17 #include "utf8.h"
  18 #include "parse-options.h"
  19
  20 static const char *fast_export_usage[] = {
  21         "git fast-export [rev-list-opts]",
  22         NULL
  23 };
  24
  25 static int progress;
  26 static enum { ABORT, VERBATIM, WARN, STRIP } signed_tag_mode = ABORT;
  27 static enum { ERROR, DROP, REWRITE } tag_of_filtered_mode = ABORT;
  28 static int fake_missing_tagger;
  29 static int use_done_feature;
  30 static int no_data;
  31 static int full_tree;
  32
  33 static int parse_opt_signed_tag_mode(const struct option *opt,
  34                                      const char *arg, int unset)
  35 {
  36         if (unset || !strcmp(arg, "abort"))
  37                 signed_tag_mode = ABORT;
  38         else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore"))
  39                 signed_tag_mode = VERBATIM;
  40         else if (!strcmp(arg, "warn"))
  41                 signed_tag_mode = WARN;
  42         else if (!strcmp(arg, "strip"))
  43                 signed_tag_mode = STRIP;
  44         else
  45                 return error("Unknown signed-tag mode: %s", arg);
  46         return 0;
  47 }
  48
  49 static int parse_opt_tag_of_filtered_mode(const struct option *opt,
  50                                           const char *arg, int unset)
  51 {
  52         if (unset || !strcmp(arg, "abort"))
  53                 tag_of_filtered_mode = ABORT;
  54         else if (!strcmp(arg, "drop"))
  55                 tag_of_filtered_mode = DROP;
  56         else if (!strcmp(arg, "rewrite"))
  57                 tag_of_filtered_mode = REWRITE;
  58         else
  59                 return error("Unknown tag-of-filtered mode: %s", arg);
  60         return 0;
  61 }
  62
  63 static struct decoration idnums;
  64 static uint32_t last_idnum;
  65
  66 static int has_unshown_parent(struct commit *commit)
  67 {
  68         struct commit_list *parent;
  69
  70         for (parent = commit->parents; parent; parent = parent->next)
  71                 if (!(parent->item->object.flags & SHOWN) &&
  72                     !(parent->item->object.flags & UNINTERESTING))
  73                         return 1;
  74         return 0;
  75 }
  76
  77 /* Since intptr_t is C99, we do not use it here */
  78 static inline uint32_t *mark_to_ptr(uint32_t mark)
  79 {
  80         return ((uint32_t *)NULL) + mark;
  81 }
  82
  83 static inline uint32_t ptr_to_mark(void * mark)
  84 {
  85         return (uint32_t *)mark - (uint32_t *)NULL;
  86 }
  87
  88 static inline void mark_object(struct object *object, uint32_t mark)
  89 {
  90         add_decoration(&idnums, object, mark_to_ptr(mark));
  91 }
  92
  93 static inline void mark_next_object(struct object *object)
  94 {
  95         mark_object(object, ++last_idnum);
  96 }
  97
  98 static int get_object_mark(struct object *object)
  99 {
 100         void *decoration = lookup_decoration(&idnums, object);
 101         if (!decoration)
 102                 return 0;
 103         return ptr_to_mark(decoration);
 104 }
 105
 106 static void show_progress(void)
 107 {
 108         static int counter = 0;
 109         if (!progress)
 110                 return;
 111         if ((++counter % progress) == 0)
 112                 printf("progress %d objects\n", counter);
 113 }
 114
 115 static void handle_object(const unsigned char *sha1)
 116 {
 117         unsigned long size;
 118         enum object_type type;
 119         char *buf;
 120         struct object *object;
 121
 122         if (no_data)
 123                 return;
 124
 125         if (is_null_sha1(sha1))
 126                 return;
 127
 128         object = parse_object(sha1);
 129         if (!object)
 130                 die ("Could not read blob %s", sha1_to_hex(sha1));
 131
 132         if (object->flags & SHOWN)
 133                 return;
 134
 135         buf = read_sha1_file(sha1, &type, &size);
 136         if (!buf)
 137                 die ("Could not read blob %s", sha1_to_hex(sha1));
 138
 139         mark_next_object(object);
 140
 141         printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
 142         if (size && fwrite(buf, size, 1, stdout) != 1)
 143                 die_errno ("Could not write blob '%s'", sha1_to_hex(sha1));
 144         printf("\n");
 145
 146         show_progress();
 147
 148         object->flags |= SHOWN;
 149         free(buf);
 150 }
 151
 152 static int depth_first(const void *a_, const void *b_)
 153 {
 154         const struct diff_filepair *a = *((const struct diff_filepair **)a_);
 155         const struct diff_filepair *b = *((const struct diff_filepair **)b_);
 156         const char *name_a, *name_b;
 157         int len_a, len_b, len;
 158         int cmp;
 159
 160         name_a = a->one ? a->one->path : a->two->path;
 161         name_b = b->one ? b->one->path : b->two->path;
 162
 163         len_a = strlen(name_a);
 164         len_b = strlen(name_b);
 165         len = (len_a < len_b) ? len_a : len_b;
 166
 167         /* strcmp will sort 'd' before 'd/e', we want 'd/e' before 'd' */
 168         cmp = memcmp(name_a, name_b, len);
 169         if (cmp)
 170                 return cmp;
 171         cmp = len_b - len_a;
 172         if (cmp)
 173                 return cmp;
 174         /*
 175          * Move 'R'ename entries last so that all references of the file
 176          * appear in the output before it is renamed (e.g., when a file
 177          * was copied and renamed in the same commit).
 178          */
 179         return (a->status == 'R') - (b->status == 'R');
 180 }
 181
 182 static void show_filemodify(struct diff_queue_struct *q,
 183                             struct diff_options *options, void *data)
 184 {
 185         int i;
 186
 187         /*
 188          * Handle files below a directory first, in case they are all deleted
 189          * and the directory changes to a file or symlink.
 190          */
 191         qsort(q->queue, q->nr, sizeof(q->queue[0]), depth_first);
 192
 193         for (i = 0; i < q->nr; i++) {
 194                 struct diff_filespec *ospec = q->queue[i]->one;
 195                 struct diff_filespec *spec = q->queue[i]->two;
 196
 197                 switch (q->queue[i]->status) {
 198                 case DIFF_STATUS_DELETED:
 199                         printf("D %s\n", spec->path);
 200                         break;
 201
 202                 case DIFF_STATUS_COPIED:
 203                 case DIFF_STATUS_RENAMED:
 204                         printf("%c \"%s\" \"%s\"\n", q->queue[i]->status,
 205                                ospec->path, spec->path);
 206
 207                         if (!hashcmp(ospec->sha1, spec->sha1) &&
 208                             ospec->mode == spec->mode)
 209                                 break;
 210                         /* fallthrough */
 211
 212                 case DIFF_STATUS_TYPE_CHANGED:
 213                 case DIFF_STATUS_MODIFIED:
 214                 case DIFF_STATUS_ADDED:
 215                         /*
 216                          * Links refer to objects in another repositories;
 217                          * output the SHA-1 verbatim.
 218                          */
 219                         if (no_data || S_ISGITLINK(spec->mode))
 220                                 printf("M %06o %s %s\n", spec->mode,
 221                                        sha1_to_hex(spec->sha1), spec->path);
 222                         else {
 223                                 struct object *object = lookup_object(spec->sha1);
 224                                 printf("M %06o :%d %s\n", spec->mode,
 225                                        get_object_mark(object), spec->path);
 226                         }
 227                         break;
 228
 229                 default:
 230                         die("Unexpected comparison status '%c' for %s, %s",
 231                                 q->queue[i]->status,
 232                                 ospec->path ? ospec->path : "none",
 233                                 spec->path ? spec->path : "none");
 234                 }
 235         }
 236 }
 237
 238 static const char *find_encoding(const char *begin, const char *end)
 239 {
 240         const char *needle = "\nencoding ";
 241         char *bol, *eol;
 242
 243         bol = memmem(begin, end ? end - begin : strlen(begin),
 244                      needle, strlen(needle));
 245         if (!bol)
 246                 return git_commit_encoding;
 247         bol += strlen(needle);
 248         eol = strchrnul(bol, '\n');
 249         *eol = '\0';
 250         return bol;
 251 }
 252
 253 static void handle_commit(struct commit *commit, struct rev_info *rev)
 254 {
 255         int saved_output_format = rev->diffopt.output_format;
 256         const char *author, *author_end, *committer, *committer_end;
 257         const char *encoding, *message;
 258         char *reencoded = NULL;
 259         struct commit_list *p;
 260         int i;
 261
 262         rev->diffopt.output_format = DIFF_FORMAT_CALLBACK;
 263
 264         parse_commit(commit);
 265         author = strstr(commit->buffer, "\nauthor ");
 266         if (!author)
 267                 die ("Could not find author in commit %s",
 268                      sha1_to_hex(commit->object.sha1));
 269         author++;
 270         author_end = strchrnul(author, '\n');
 271         committer = strstr(author_end, "\ncommitter ");
 272         if (!committer)
 273                 die ("Could not find committer in commit %s",
 274                      sha1_to_hex(commit->object.sha1));
 275         committer++;
 276         committer_end = strchrnul(committer, '\n');
 277         message = strstr(committer_end, "\n\n");
 278         encoding = find_encoding(committer_end, message);
 279         if (message)
 280                 message += 2;
 281
 282         if (commit->parents &&
 283             get_object_mark(&commit->parents->item->object) != 0 &&
 284             !full_tree) {
 285                 parse_commit(commit->parents->item);
 286                 diff_tree_sha1(commit->parents->item->tree->object.sha1,
 287                                commit->tree->object.sha1, "", &rev->diffopt);
 288         }
 289         else
 290                 diff_root_tree_sha1(commit->tree->object.sha1,
 291                                     "", &rev->diffopt);
 292
 293         /* Export the referenced blobs, and remember the marks. */
 294         for (i = 0; i < diff_queued_diff.nr; i++)
 295                 if (!S_ISGITLINK(diff_queued_diff.queue[i]->two->mode))
 296                         handle_object(diff_queued_diff.queue[i]->two->sha1);
 297
 298         mark_next_object(&commit->object);
 299         if (!is_encoding_utf8(encoding))
 300                 reencoded = reencode_string(message, "UTF-8", encoding);
 301         if (!commit->parents)
 302                 printf("reset %s\n", (const char*)commit->util);
 303         printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
 304                (const char *)commit->util, last_idnum,
 305                (int)(author_end - author), author,
 306                (int)(committer_end - committer), committer,
 307                (unsigned)(reencoded
 308                           ? strlen(reencoded) : message
 309                           ? strlen(message) : 0),
 310                reencoded ? reencoded : message ? message : "");
 311         free(reencoded);
 312
 313         for (i = 0, p = commit->parents; p; p = p->next) {
 314                 int mark = get_object_mark(&p->item->object);
 315                 if (!mark)
 316                         continue;
 317                 if (i == 0)
 318                         printf("from :%d\n", mark);
 319                 else
 320                         printf("merge :%d\n", mark);
 321                 i++;
 322         }
 323
 324         if (full_tree)
 325                 printf("deleteall\n");
 326         log_tree_diff_flush(rev);
 327         rev->diffopt.output_format = saved_output_format;
 328
 329         printf("\n");
 330
 331         show_progress();
 332 }
 333
 334 static void handle_tail(struct object_array *commits, struct rev_info *revs)
 335 {
 336         struct commit *commit;
 337         while (commits->nr) {
 338                 commit = (struct commit *)commits->objects[commits->nr - 1].item;
 339                 if (has_unshown_parent(commit))
 340                         return;
 341                 handle_commit(commit, revs);
 342                 commits->nr--;
 343         }
 344 }
 345
 346 static void handle_tag(const char *name, struct tag *tag)
 347 {
 348         unsigned long size;
 349         enum object_type type;
 350         char *buf;
 351         const char *tagger, *tagger_end, *message;
 352         size_t message_size = 0;
 353         struct object *tagged;
 354         int tagged_mark;
 355         struct commit *p;
 356
 357         /* Trees have no identifer in fast-export output, thus we have no way
 358          * to output tags of trees, tags of tags of trees, etc.  Simply omit
 359          * such tags.
 360          */
 361         tagged = tag->tagged;
 362         while (tagged->type == OBJ_TAG) {
 363                 tagged = ((struct tag *)tagged)->tagged;
 364         }
 365         if (tagged->type == OBJ_TREE) {
 366                 warning("Omitting tag %s,\nsince tags of trees (or tags of tags of trees, etc.) are not supported.",
 367                         sha1_to_hex(tag->object.sha1));
 368                 return;
 369         }
 370
 371         buf = read_sha1_file(tag->object.sha1, &type, &size);
 372         if (!buf)
 373                 die ("Could not read tag %s", sha1_to_hex(tag->object.sha1));
 374         message = memmem(buf, size, "\n\n", 2);
 375         if (message) {
 376                 message += 2;
 377                 message_size = strlen(message);
 378         }
 379         tagger = memmem(buf, message ? message - buf : size, "\ntagger ", 8);
 380         if (!tagger) {
 381                 if (fake_missing_tagger)
 382                         tagger = "tagger Unspecified Tagger "
 383                                 "<unspecified-tagger> 0 +0000";
 384                 else
 385                         tagger = "";
 386                 tagger_end = tagger + strlen(tagger);
 387         } else {
 388                 tagger++;
 389                 tagger_end = strchrnul(tagger, '\n');
 390         }
 391
 392         /* handle signed tags */
 393         if (message) {
 394                 const char *signature = strstr(message,
 395                                                "\n-----BEGIN PGP SIGNATURE-----\n");
 396                 if (signature)
 397                         switch(signed_tag_mode) {
 398                         case ABORT:
 399                                 die ("Encountered signed tag %s; use "
 400                                      "--signed-tag=<mode> to handle it.",
 401                                      sha1_to_hex(tag->object.sha1));
 402                         case WARN:
 403                                 warning ("Exporting signed tag %s",
 404                                          sha1_to_hex(tag->object.sha1));
 405                                 /* fallthru */
 406                         case VERBATIM:
 407                                 break;
 408                         case STRIP:
 409                                 message_size = signature + 1 - message;
 410                                 break;
 411                         }
 412         }
 413
 414         /* handle tag->tagged having been filtered out due to paths specified */
 415         tagged = tag->tagged;
 416         tagged_mark = get_object_mark(tagged);
 417         if (!tagged_mark) {
 418                 switch(tag_of_filtered_mode) {
 419                 case ABORT:
 420                         die ("Tag %s tags unexported object; use "
 421                              "--tag-of-filtered-object=<mode> to handle it.",
 422                              sha1_to_hex(tag->object.sha1));
 423                 case DROP:
 424                         /* Ignore this tag altogether */
 425                         return;
 426                 case REWRITE:
 427                         if (tagged->type != OBJ_COMMIT) {
 428                                 die ("Tag %s tags unexported %s!",
 429                                      sha1_to_hex(tag->object.sha1),
 430                                      typename(tagged->type));
 431                         }
 432                         p = (struct commit *)tagged;
 433                         for (;;) {
 434                                 if (p->parents && p->parents->next)
 435                                         break;
 436                                 if (p->object.flags & UNINTERESTING)
 437                                         break;
 438                                 if (!(p->object.flags & TREESAME))
 439                                         break;
 440                                 if (!p->parents)
 441                                         die ("Can't find replacement commit for tag %s\n",
 442                                              sha1_to_hex(tag->object.sha1));
 443                                 p = p->parents->item;
 444                         }
 445                         tagged_mark = get_object_mark(&p->object);
 446                 }
 447         }
 448
 449         if (!prefixcmp(name, "refs/tags/"))
 450                 name += 10;
 451         printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
 452                name, tagged_mark,
 453                (int)(tagger_end - tagger), tagger,
 454                tagger == tagger_end ? "" : "\n",
 455                (int)message_size, (int)message_size, message ? message : "");
 456 }
 457
 458 static void get_tags_and_duplicates(struct object_array *pending,
 459                                     struct string_list *extra_refs)
 460 {
 461         struct tag *tag;
 462         int i;
 463
 464         for (i = 0; i < pending->nr; i++) {
 465                 struct object_array_entry *e = pending->objects + i;
 466                 unsigned char sha1[20];
 467                 struct commit *commit = commit;
 468                 char *full_name;
 469
 470                 if (dwim_ref(e->name, strlen(e->name), sha1, &full_name) != 1)
 471                         continue;
 472
 473                 switch (e->item->type) {
 474                 case OBJ_COMMIT:
 475                         commit = (struct commit *)e->item;
 476                         break;
 477                 case OBJ_TAG:
 478                         tag = (struct tag *)e->item;
 479
 480                         /* handle nested tags */
 481                         while (tag && tag->object.type == OBJ_TAG) {
 482                                 parse_object(tag->object.sha1);
 483                                 string_list_append(extra_refs, full_name)->util = tag;
 484                                 tag = (struct tag *)tag->tagged;
 485                         }
 486                         if (!tag)
 487                                 die ("Tag %s points nowhere?", e->name);
 488                         switch(tag->object.type) {
 489                         case OBJ_COMMIT:
 490                                 commit = (struct commit *)tag;
 491                                 break;
 492                         case OBJ_BLOB:
 493                                 handle_object(tag->object.sha1);
 494                                 continue;
 495                         default: /* OBJ_TAG (nested tags) is already handled */
 496                                 warning("Tag points to object of unexpected type %s, skipping.",
 497                                         typename(tag->object.type));
 498                                 continue;
 499                         }
 500                         break;
 501                 default:
 502                         warning("%s: Unexpected object of type %s, skipping.",
 503                                 e->name,
 504                                 typename(e->item->type));
 505                         continue;
 506                 }
 507                 if (commit->util)
 508                         /* more than one name for the same object */
 509                         string_list_append(extra_refs, full_name)->util = commit;
 510                 else
 511                         commit->util = full_name;
 512         }
 513 }
 514
 515 static void handle_tags_and_duplicates(struct string_list *extra_refs)
 516 {
 517         struct commit *commit;
 518         int i;
 519
 520         for (i = extra_refs->nr - 1; i >= 0; i--) {
 521                 const char *name = extra_refs->items[i].string;
 522                 struct object *object = extra_refs->items[i].util;
 523                 switch (object->type) {
 524                 case OBJ_TAG:
 525                         handle_tag(name, (struct tag *)object);
 526                         break;
 527                 case OBJ_COMMIT:
 528                         /* create refs pointing to already seen commits */
 529                         commit = (struct commit *)object;
 530                         printf("reset %s\nfrom :%d\n\n", name,
 531                                get_object_mark(&commit->object));
 532                         show_progress();
 533                         break;
 534                 }
 535         }
 536 }
 537
 538 static void export_marks(char *file)
 539 {
 540         unsigned int i;
 541         uint32_t mark;
 542         struct object_decoration *deco = idnums.hash;
 543         FILE *f;
 544         int e = 0;
 545
 546         f = fopen(file, "w");
 547         if (!f)
 548                 die_errno("Unable to open marks file %s for writing.", file);
 549
 550         for (i = 0; i < idnums.size; i++) {
 551                 if (deco->base && deco->base->type == 1) {
 552                         mark = ptr_to_mark(deco->decoration);
 553                         if (fprintf(f, ":%"PRIu32" %s\n", mark,
 554                                 sha1_to_hex(deco->base->sha1)) < 0) {
 555                             e = 1;
 556                             break;
 557                         }
 558                 }
 559                 deco++;
 560         }
 561
 562         e |= ferror(f);
 563         e |= fclose(f);
 564         if (e)
 565                 error("Unable to write marks file %s.", file);
 566 }
 567
 568 static void import_marks(char *input_file)
 569 {
 570         char line[512];
 571         FILE *f = fopen(input_file, "r");
 572         if (!f)
 573                 die_errno("cannot read '%s'", input_file);
 574
 575         while (fgets(line, sizeof(line), f)) {
 576                 uint32_t mark;
 577                 char *line_end, *mark_end;
 578                 unsigned char sha1[20];
 579                 struct object *object;
 580
 581                 line_end = strchr(line, '\n');
 582                 if (line[0] != ':' || !line_end)
 583                         die("corrupt mark line: %s", line);
 584                 *line_end = '\0';
 585
 586                 mark = strtoumax(line + 1, &mark_end, 10);
 587                 if (!mark || mark_end == line + 1
 588                         || *mark_end != ' ' || get_sha1(mark_end + 1, sha1))
 589                         die("corrupt mark line: %s", line);
 590
 591                 object = parse_object(sha1);
 592                 if (!object)
 593                         die ("Could not read blob %s", sha1_to_hex(sha1));
 594
 595                 if (object->flags & SHOWN)
 596                         error("Object %s already has a mark", sha1);
 597
 598                 mark_object(object, mark);
 599                 if (last_idnum < mark)
 600                         last_idnum = mark;
 601
 602                 object->flags |= SHOWN;
 603         }
 604         fclose(f);
 605 }
 606
 607 int cmd_fast_export(int argc, const char **argv, const char *prefix)
 608 {
 609         struct rev_info revs;
 610         struct object_array commits = OBJECT_ARRAY_INIT;
 611         struct string_list extra_refs = STRING_LIST_INIT_NODUP;
 612         struct commit *commit;
 613         char *export_filename = NULL, *import_filename = NULL;
 614         struct option options[] = {
 615                 OPT_INTEGER(0, "progress", &progress,
 616                             "show progress after <n> objects"),
 617                 OPT_CALLBACK(0, "signed-tags", &signed_tag_mode, "mode",
 618                              "select handling of signed tags",
 619                              parse_opt_signed_tag_mode),
 620                 OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode, "mode",
 621                              "select handling of tags that tag filtered objects",
 622                              parse_opt_tag_of_filtered_mode),
 623                 OPT_STRING(0, "export-marks", &export_filename, "file",
 624                              "Dump marks to this file"),
 625                 OPT_STRING(0, "import-marks", &import_filename, "file",
 626                              "Import marks from this file"),
 627                 OPT_BOOLEAN(0, "fake-missing-tagger", &fake_missing_tagger,
 628                              "Fake a tagger when tags lack one"),
 629                 OPT_BOOLEAN(0, "full-tree", &full_tree,
 630                              "Output full tree for each commit"),
 631                 OPT_BOOLEAN(0, "use-done-feature", &use_done_feature,
 632                              "Use the done feature to terminate the stream"),
 633                 { OPTION_NEGBIT, 0, "data", &no_data, NULL,
 634                         "Skip output of blob data",
 635                         PARSE_OPT_NOARG | PARSE_OPT_NEGHELP, NULL, 1 },
 636                 OPT_END()
 637         };
 638
 639         if (argc == 1)
 640                 usage_with_options (fast_export_usage, options);
 641
 642         /* we handle encodings */
 643         git_config(git_default_config, NULL);
 644
 645         init_revisions(&revs, prefix);
 646         revs.topo_order = 1;
 647         revs.show_source = 1;
 648         revs.rewrite_parents = 1;
 649         argc = setup_revisions(argc, argv, &revs, NULL);
 650         argc = parse_options(argc, argv, prefix, options, fast_export_usage, 0);
 651         if (argc > 1)
 652                 usage_with_options (fast_export_usage, options);
 653
 654         if (use_done_feature)
 655                 printf("feature done\n");
 656
 657         if (import_filename)
 658                 import_marks(import_filename);
 659
 660         if (import_filename && revs.prune_data.nr)
 661                 full_tree = 1;
 662
 663         get_tags_and_duplicates(&revs.pending, &extra_refs);
 664
 665         if (prepare_revision_walk(&revs))
 666                 die("revision walk setup failed");
 667         revs.diffopt.format_callback = show_filemodify;
 668         DIFF_OPT_SET(&revs.diffopt, RECURSIVE);
 669         while ((commit = get_revision(&revs))) {
 670                 if (has_unshown_parent(commit)) {
 671                         add_object_array(&commit->object, NULL, &commits);
 672                 }
 673                 else {
 674                         handle_commit(commit, &revs);
 675                         handle_tail(&commits, &revs);
 676                 }
 677         }
 678
 679         handle_tags_and_duplicates(&extra_refs);
 680
 681         if (export_filename)
 682                 export_marks(export_filename);
 683
 684         if (use_done_feature)
 685                 printf("done\n");
 686
 687         return 0;
 688 }