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 #include "quote.h"
  20
  21 static const char *fast_export_usage[] = {
  22         N_("git fast-export [rev-list-opts]"),
  23         NULL
  24 };
  25
  26 static int progress;
  27 static enum { ABORT, VERBATIM, WARN, WARN_STRIP, STRIP } signed_tag_mode = ABORT;
  28 static enum { ERROR, DROP, REWRITE } tag_of_filtered_mode = ERROR;
  29 static int fake_missing_tagger;
  30 static int use_done_feature;
  31 static int no_data;
  32 static int full_tree;
  33 static struct string_list extra_refs = STRING_LIST_INIT_NODUP;
  34
  35 static int parse_opt_signed_tag_mode(const struct option *opt,
  36                                      const char *arg, int unset)
  37 {
  38         if (unset || !strcmp(arg, "abort"))
  39                 signed_tag_mode = ABORT;
  40         else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore"))
  41                 signed_tag_mode = VERBATIM;
  42         else if (!strcmp(arg, "warn"))
  43                 signed_tag_mode = WARN;
  44         else if (!strcmp(arg, "warn-strip"))
  45                 signed_tag_mode = WARN_STRIP;
  46         else if (!strcmp(arg, "strip"))
  47                 signed_tag_mode = STRIP;
  48         else
  49                 return error("Unknown signed-tags mode: %s", arg);
  50         return 0;
  51 }
  52
  53 static int parse_opt_tag_of_filtered_mode(const struct option *opt,
  54                                           const char *arg, int unset)
  55 {
  56         if (unset || !strcmp(arg, "abort"))
  57                 tag_of_filtered_mode = ERROR;
  58         else if (!strcmp(arg, "drop"))
  59                 tag_of_filtered_mode = DROP;
  60         else if (!strcmp(arg, "rewrite"))
  61                 tag_of_filtered_mode = REWRITE;
  62         else
  63                 return error("Unknown tag-of-filtered mode: %s", arg);
  64         return 0;
  65 }
  66
  67 static struct decoration idnums;
  68 static uint32_t last_idnum;
  69
  70 static int has_unshown_parent(struct commit *commit)
  71 {
  72         struct commit_list *parent;
  73
  74         for (parent = commit->parents; parent; parent = parent->next)
  75                 if (!(parent->item->object.flags & SHOWN) &&
  76                     !(parent->item->object.flags & UNINTERESTING))
  77                         return 1;
  78         return 0;
  79 }
  80
  81 /* Since intptr_t is C99, we do not use it here */
  82 static inline uint32_t *mark_to_ptr(uint32_t mark)
  83 {
  84         return ((uint32_t *)NULL) + mark;
  85 }
  86
  87 static inline uint32_t ptr_to_mark(void * mark)
  88 {
  89         return (uint32_t *)mark - (uint32_t *)NULL;
  90 }
  91
  92 static inline void mark_object(struct object *object, uint32_t mark)
  93 {
  94         add_decoration(&idnums, object, mark_to_ptr(mark));
  95 }
  96
  97 static inline void mark_next_object(struct object *object)
  98 {
  99         mark_object(object, ++last_idnum);
 100 }
 101
 102 static int get_object_mark(struct object *object)
 103 {
 104         void *decoration = lookup_decoration(&idnums, object);
 105         if (!decoration)
 106                 return 0;
 107         return ptr_to_mark(decoration);
 108 }
 109
 110 static void show_progress(void)
 111 {
 112         static int counter = 0;
 113         if (!progress)
 114                 return;
 115         if ((++counter % progress) == 0)
 116                 printf("progress %d objects\n", counter);
 117 }
 118
 119 static void export_blob(const unsigned char *sha1)
 120 {
 121         unsigned long size;
 122         enum object_type type;
 123         char *buf;
 124         struct object *object;
 125         int eaten;
 126
 127         if (no_data)
 128                 return;
 129
 130         if (is_null_sha1(sha1))
 131                 return;
 132
 133         object = lookup_object(sha1);
 134         if (object && object->flags & SHOWN)
 135                 return;
 136
 137         buf = read_sha1_file(sha1, &type, &size);
 138         if (!buf)
 139                 die ("Could not read blob %s", sha1_to_hex(sha1));
 140         if (check_sha1_signature(sha1, buf, size, typename(type)) < 0)
 141                 die("sha1 mismatch in blob %s", sha1_to_hex(sha1));
 142         object = parse_object_buffer(sha1, type, size, buf, &eaten);
 143         if (!object)
 144                 die("Could not read blob %s", sha1_to_hex(sha1));
 145
 146         mark_next_object(object);
 147
 148         printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
 149         if (size && fwrite(buf, size, 1, stdout) != 1)
 150                 die_errno ("Could not write blob '%s'", sha1_to_hex(sha1));
 151         printf("\n");
 152
 153         show_progress();
 154
 155         object->flags |= SHOWN;
 156         if (!eaten)
 157                 free(buf);
 158 }
 159
 160 static int depth_first(const void *a_, const void *b_)
 161 {
 162         const struct diff_filepair *a = *((const struct diff_filepair **)a_);
 163         const struct diff_filepair *b = *((const struct diff_filepair **)b_);
 164         const char *name_a, *name_b;
 165         int len_a, len_b, len;
 166         int cmp;
 167
 168         name_a = a->one ? a->one->path : a->two->path;
 169         name_b = b->one ? b->one->path : b->two->path;
 170
 171         len_a = strlen(name_a);
 172         len_b = strlen(name_b);
 173         len = (len_a < len_b) ? len_a : len_b;
 174
 175         /* strcmp will sort 'd' before 'd/e', we want 'd/e' before 'd' */
 176         cmp = memcmp(name_a, name_b, len);
 177         if (cmp)
 178                 return cmp;
 179         cmp = len_b - len_a;
 180         if (cmp)
 181                 return cmp;
 182         /*
 183          * Move 'R'ename entries last so that all references of the file
 184          * appear in the output before it is renamed (e.g., when a file
 185          * was copied and renamed in the same commit).
 186          */
 187         return (a->status == 'R') - (b->status == 'R');
 188 }
 189
 190 static void print_path(const char *path)
 191 {
 192         int need_quote = quote_c_style(path, NULL, NULL, 0);
 193         if (need_quote)
 194                 quote_c_style(path, NULL, stdout, 0);
 195         else if (strchr(path, ' '))
 196                 printf("\"%s\"", path);
 197         else
 198                 printf("%s", path);
 199 }
 200
 201 static void show_filemodify(struct diff_queue_struct *q,
 202                             struct diff_options *options, void *data)
 203 {
 204         int i;
 205
 206         /*
 207          * Handle files below a directory first, in case they are all deleted
 208          * and the directory changes to a file or symlink.
 209          */
 210         qsort(q->queue, q->nr, sizeof(q->queue[0]), depth_first);
 211
 212         for (i = 0; i < q->nr; i++) {
 213                 struct diff_filespec *ospec = q->queue[i]->one;
 214                 struct diff_filespec *spec = q->queue[i]->two;
 215
 216                 switch (q->queue[i]->status) {
 217                 case DIFF_STATUS_DELETED:
 218                         printf("D ");
 219                         print_path(spec->path);
 220                         putchar('\n');
 221                         break;
 222
 223                 case DIFF_STATUS_COPIED:
 224                 case DIFF_STATUS_RENAMED:
 225                         printf("%c ", q->queue[i]->status);
 226                         print_path(ospec->path);
 227                         putchar(' ');
 228                         print_path(spec->path);
 229                         putchar('\n');
 230
 231                         if (!hashcmp(ospec->sha1, spec->sha1) &&
 232                             ospec->mode == spec->mode)
 233                                 break;
 234                         /* fallthrough */
 235
 236                 case DIFF_STATUS_TYPE_CHANGED:
 237                 case DIFF_STATUS_MODIFIED:
 238                 case DIFF_STATUS_ADDED:
 239                         /*
 240                          * Links refer to objects in another repositories;
 241                          * output the SHA-1 verbatim.
 242                          */
 243                         if (no_data || S_ISGITLINK(spec->mode))
 244                                 printf("M %06o %s ", spec->mode,
 245                                        sha1_to_hex(spec->sha1));
 246                         else {
 247                                 struct object *object = lookup_object(spec->sha1);
 248                                 printf("M %06o :%d ", spec->mode,
 249                                        get_object_mark(object));
 250                         }
 251                         print_path(spec->path);
 252                         putchar('\n');
 253                         break;
 254
 255                 default:
 256                         die("Unexpected comparison status '%c' for %s, %s",
 257                                 q->queue[i]->status,
 258                                 ospec->path ? ospec->path : "none",
 259                                 spec->path ? spec->path : "none");
 260                 }
 261         }
 262 }
 263
 264 static const char *find_encoding(const char *begin, const char *end)
 265 {
 266         const char *needle = "\nencoding ";
 267         char *bol, *eol;
 268
 269         bol = memmem(begin, end ? end - begin : strlen(begin),
 270                      needle, strlen(needle));
 271         if (!bol)
 272                 return git_commit_encoding;
 273         bol += strlen(needle);
 274         eol = strchrnul(bol, '\n');
 275         *eol = '\0';
 276         return bol;
 277 }
 278
 279 static void handle_commit(struct commit *commit, struct rev_info *rev)
 280 {
 281         int saved_output_format = rev->diffopt.output_format;
 282         const char *commit_buffer;
 283         const char *author, *author_end, *committer, *committer_end;
 284         const char *encoding, *message;
 285         char *reencoded = NULL;
 286         struct commit_list *p;
 287         int i;
 288
 289         rev->diffopt.output_format = DIFF_FORMAT_CALLBACK;
 290
 291         parse_commit_or_die(commit);
 292         commit_buffer = get_commit_buffer(commit, NULL);
 293         author = strstr(commit_buffer, "\nauthor ");
 294         if (!author)
 295                 die ("Could not find author in commit %s",
 296                      sha1_to_hex(commit->object.sha1));
 297         author++;
 298         author_end = strchrnul(author, '\n');
 299         committer = strstr(author_end, "\ncommitter ");
 300         if (!committer)
 301                 die ("Could not find committer in commit %s",
 302                      sha1_to_hex(commit->object.sha1));
 303         committer++;
 304         committer_end = strchrnul(committer, '\n');
 305         message = strstr(committer_end, "\n\n");
 306         encoding = find_encoding(committer_end, message);
 307         if (message)
 308                 message += 2;
 309
 310         if (commit->parents &&
 311             get_object_mark(&commit->parents->item->object) != 0 &&
 312             !full_tree) {
 313                 parse_commit_or_die(commit->parents->item);
 314                 diff_tree_sha1(commit->parents->item->tree->object.sha1,
 315                                commit->tree->object.sha1, "", &rev->diffopt);
 316         }
 317         else
 318                 diff_root_tree_sha1(commit->tree->object.sha1,
 319                                     "", &rev->diffopt);
 320
 321         /* Export the referenced blobs, and remember the marks. */
 322         for (i = 0; i < diff_queued_diff.nr; i++)
 323                 if (!S_ISGITLINK(diff_queued_diff.queue[i]->two->mode))
 324                         export_blob(diff_queued_diff.queue[i]->two->sha1);
 325
 326         mark_next_object(&commit->object);
 327         if (!is_encoding_utf8(encoding))
 328                 reencoded = reencode_string(message, "UTF-8", encoding);
 329         if (!commit->parents)
 330                 printf("reset %s\n", (const char*)commit->util);
 331         printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
 332                (const char *)commit->util, last_idnum,
 333                (int)(author_end - author), author,
 334                (int)(committer_end - committer), committer,
 335                (unsigned)(reencoded
 336                           ? strlen(reencoded) : message
 337                           ? strlen(message) : 0),
 338                reencoded ? reencoded : message ? message : "");
 339         free(reencoded);
 340         unuse_commit_buffer(commit, commit_buffer);
 341
 342         for (i = 0, p = commit->parents; p; p = p->next) {
 343                 int mark = get_object_mark(&p->item->object);
 344                 if (!mark)
 345                         continue;
 346                 if (i == 0)
 347                         printf("from :%d\n", mark);
 348                 else
 349                         printf("merge :%d\n", mark);
 350                 i++;
 351         }
 352
 353         if (full_tree)
 354                 printf("deleteall\n");
 355         log_tree_diff_flush(rev);
 356         rev->diffopt.output_format = saved_output_format;
 357
 358         printf("\n");
 359
 360         show_progress();
 361 }
 362
 363 static void handle_tail(struct object_array *commits, struct rev_info *revs)
 364 {
 365         struct commit *commit;
 366         while (commits->nr) {
 367                 commit = (struct commit *)commits->objects[commits->nr - 1].item;
 368                 if (has_unshown_parent(commit))
 369                         return;
 370                 handle_commit(commit, revs);
 371                 commits->nr--;
 372         }
 373 }
 374
 375 static void handle_tag(const char *name, struct tag *tag)
 376 {
 377         unsigned long size;
 378         enum object_type type;
 379         char *buf;
 380         const char *tagger, *tagger_end, *message;
 381         size_t message_size = 0;
 382         struct object *tagged;
 383         int tagged_mark;
 384         struct commit *p;
 385
 386         /* Trees have no identifier in fast-export output, thus we have no way
 387          * to output tags of trees, tags of tags of trees, etc.  Simply omit
 388          * such tags.
 389          */
 390         tagged = tag->tagged;
 391         while (tagged->type == OBJ_TAG) {
 392                 tagged = ((struct tag *)tagged)->tagged;
 393         }
 394         if (tagged->type == OBJ_TREE) {
 395                 warning("Omitting tag %s,\nsince tags of trees (or tags of tags of trees, etc.) are not supported.",
 396                         sha1_to_hex(tag->object.sha1));
 397                 return;
 398         }
 399
 400         buf = read_sha1_file(tag->object.sha1, &type, &size);
 401         if (!buf)
 402                 die ("Could not read tag %s", sha1_to_hex(tag->object.sha1));
 403         message = memmem(buf, size, "\n\n", 2);
 404         if (message) {
 405                 message += 2;
 406                 message_size = strlen(message);
 407         }
 408         tagger = memmem(buf, message ? message - buf : size, "\ntagger ", 8);
 409         if (!tagger) {
 410                 if (fake_missing_tagger)
 411                         tagger = "tagger Unspecified Tagger "
 412                                 "<unspecified-tagger> 0 +0000";
 413                 else
 414                         tagger = "";
 415                 tagger_end = tagger + strlen(tagger);
 416         } else {
 417                 tagger++;
 418                 tagger_end = strchrnul(tagger, '\n');
 419         }
 420
 421         /* handle signed tags */
 422         if (message) {
 423                 const char *signature = strstr(message,
 424                                                "\n-----BEGIN PGP SIGNATURE-----\n");
 425                 if (signature)
 426                         switch(signed_tag_mode) {
 427                         case ABORT:
 428                                 die ("Encountered signed tag %s; use "
 429                                      "--signed-tags=<mode> to handle it.",
 430                                      sha1_to_hex(tag->object.sha1));
 431                         case WARN:
 432                                 warning ("Exporting signed tag %s",
 433                                          sha1_to_hex(tag->object.sha1));
 434                                 /* fallthru */
 435                         case VERBATIM:
 436                                 break;
 437                         case WARN_STRIP:
 438                                 warning ("Stripping signature from tag %s",
 439                                          sha1_to_hex(tag->object.sha1));
 440                                 /* fallthru */
 441                         case STRIP:
 442                                 message_size = signature + 1 - message;
 443                                 break;
 444                         }
 445         }
 446
 447         /* handle tag->tagged having been filtered out due to paths specified */
 448         tagged = tag->tagged;
 449         tagged_mark = get_object_mark(tagged);
 450         if (!tagged_mark) {
 451                 switch(tag_of_filtered_mode) {
 452                 case ABORT:
 453                         die ("Tag %s tags unexported object; use "
 454                              "--tag-of-filtered-object=<mode> to handle it.",
 455                              sha1_to_hex(tag->object.sha1));
 456                 case DROP:
 457                         /* Ignore this tag altogether */
 458                         return;
 459                 case REWRITE:
 460                         if (tagged->type != OBJ_COMMIT) {
 461                                 die ("Tag %s tags unexported %s!",
 462                                      sha1_to_hex(tag->object.sha1),
 463                                      typename(tagged->type));
 464                         }
 465                         p = (struct commit *)tagged;
 466                         for (;;) {
 467                                 if (p->parents && p->parents->next)
 468                                         break;
 469                                 if (p->object.flags & UNINTERESTING)
 470                                         break;
 471                                 if (!(p->object.flags & TREESAME))
 472                                         break;
 473                                 if (!p->parents)
 474                                         die ("Can't find replacement commit for tag %s\n",
 475                                              sha1_to_hex(tag->object.sha1));
 476                                 p = p->parents->item;
 477                         }
 478                         tagged_mark = get_object_mark(&p->object);
 479                 }
 480         }
 481
 482         if (starts_with(name, "refs/tags/"))
 483                 name += 10;
 484         printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
 485                name, tagged_mark,
 486                (int)(tagger_end - tagger), tagger,
 487                tagger == tagger_end ? "" : "\n",
 488                (int)message_size, (int)message_size, message ? message : "");
 489 }
 490
 491 static struct commit *get_commit(struct rev_cmdline_entry *e, char *full_name)
 492 {
 493         switch (e->item->type) {
 494         case OBJ_COMMIT:
 495                 return (struct commit *)e->item;
 496         case OBJ_TAG: {
 497                 struct tag *tag = (struct tag *)e->item;
 498
 499                 /* handle nested tags */
 500                 while (tag && tag->object.type == OBJ_TAG) {
 501                         parse_object(tag->object.sha1);
 502                         string_list_append(&extra_refs, full_name)->util = tag;
 503                         tag = (struct tag *)tag->tagged;
 504                 }
 505                 if (!tag)
 506                         die("Tag %s points nowhere?", e->name);
 507                 return (struct commit *)tag;
 508                 break;
 509         }
 510         default:
 511                 return NULL;
 512         }
 513 }
 514
 515 static void get_tags_and_duplicates(struct rev_cmdline_info *info)
 516 {
 517         int i;
 518
 519         for (i = 0; i < info->nr; i++) {
 520                 struct rev_cmdline_entry *e = info->rev + i;
 521                 unsigned char sha1[20];
 522                 struct commit *commit;
 523                 char *full_name;
 524
 525                 if (e->flags & UNINTERESTING)
 526                         continue;
 527
 528                 if (dwim_ref(e->name, strlen(e->name), sha1, &full_name) != 1)
 529                         continue;
 530
 531                 commit = get_commit(e, full_name);
 532                 if (!commit) {
 533                         warning("%s: Unexpected object of type %s, skipping.",
 534                                 e->name,
 535                                 typename(e->item->type));
 536                         continue;
 537                 }
 538
 539                 switch(commit->object.type) {
 540                 case OBJ_COMMIT:
 541                         break;
 542                 case OBJ_BLOB:
 543                         export_blob(commit->object.sha1);
 544                         continue;
 545                 default: /* OBJ_TAG (nested tags) is already handled */
 546                         warning("Tag points to object of unexpected type %s, skipping.",
 547                                 typename(commit->object.type));
 548                         continue;
 549                 }
 550
 551                 /*
 552                  * This ref will not be updated through a commit, lets make
 553                  * sure it gets properly updated eventually.
 554                  */
 555                 if (commit->util || commit->object.flags & SHOWN)
 556                         string_list_append(&extra_refs, full_name)->util = commit;
 557                 if (!commit->util)
 558                         commit->util = full_name;
 559         }
 560 }
 561
 562 static void handle_tags_and_duplicates(void)
 563 {
 564         struct commit *commit;
 565         int i;
 566
 567         for (i = extra_refs.nr - 1; i >= 0; i--) {
 568                 const char *name = extra_refs.items[i].string;
 569                 struct object *object = extra_refs.items[i].util;
 570                 switch (object->type) {
 571                 case OBJ_TAG:
 572                         handle_tag(name, (struct tag *)object);
 573                         break;
 574                 case OBJ_COMMIT:
 575                         /* create refs pointing to already seen commits */
 576                         commit = (struct commit *)object;
 577                         printf("reset %s\nfrom :%d\n\n", name,
 578                                get_object_mark(&commit->object));
 579                         show_progress();
 580                         break;
 581                 }
 582         }
 583 }
 584
 585 static void export_marks(char *file)
 586 {
 587         unsigned int i;
 588         uint32_t mark;
 589         struct object_decoration *deco = idnums.hash;
 590         FILE *f;
 591         int e = 0;
 592
 593         f = fopen(file, "w");
 594         if (!f)
 595                 die_errno("Unable to open marks file %s for writing.", file);
 596
 597         for (i = 0; i < idnums.size; i++) {
 598                 if (deco->base && deco->base->type == 1) {
 599                         mark = ptr_to_mark(deco->decoration);
 600                         if (fprintf(f, ":%"PRIu32" %s\n", mark,
 601                                 sha1_to_hex(deco->base->sha1)) < 0) {
 602                             e = 1;
 603                             break;
 604                         }
 605                 }
 606                 deco++;
 607         }
 608
 609         e |= ferror(f);
 610         e |= fclose(f);
 611         if (e)
 612                 error("Unable to write marks file %s.", file);
 613 }
 614
 615 static void import_marks(char *input_file)
 616 {
 617         char line[512];
 618         FILE *f = fopen(input_file, "r");
 619         if (!f)
 620                 die_errno("cannot read '%s'", input_file);
 621
 622         while (fgets(line, sizeof(line), f)) {
 623                 uint32_t mark;
 624                 char *line_end, *mark_end;
 625                 unsigned char sha1[20];
 626                 struct object *object;
 627                 struct commit *commit;
 628                 enum object_type type;
 629
 630                 line_end = strchr(line, '\n');
 631                 if (line[0] != ':' || !line_end)
 632                         die("corrupt mark line: %s", line);
 633                 *line_end = '\0';
 634
 635                 mark = strtoumax(line + 1, &mark_end, 10);
 636                 if (!mark || mark_end == line + 1
 637                         || *mark_end != ' ' || get_sha1_hex(mark_end + 1, sha1))
 638                         die("corrupt mark line: %s", line);
 639
 640                 if (last_idnum < mark)
 641                         last_idnum = mark;
 642
 643                 type = sha1_object_info(sha1, NULL);
 644                 if (type < 0)
 645                         die("object not found: %s", sha1_to_hex(sha1));
 646
 647                 if (type != OBJ_COMMIT)
 648                         /* only commits */
 649                         continue;
 650
 651                 commit = lookup_commit(sha1);
 652                 if (!commit)
 653                         die("not a commit? can't happen: %s", sha1_to_hex(sha1));
 654
 655                 object = &commit->object;
 656
 657                 if (object->flags & SHOWN)
 658                         error("Object %s already has a mark", sha1_to_hex(sha1));
 659
 660                 mark_object(object, mark);
 661
 662                 object->flags |= SHOWN;
 663         }
 664         fclose(f);
 665 }
 666
 667 int cmd_fast_export(int argc, const char **argv, const char *prefix)
 668 {
 669         struct rev_info revs;
 670         struct object_array commits = OBJECT_ARRAY_INIT;
 671         struct commit *commit;
 672         char *export_filename = NULL, *import_filename = NULL;
 673         uint32_t lastimportid;
 674         struct option options[] = {
 675                 OPT_INTEGER(0, "progress", &progress,
 676                             N_("show progress after <n> objects")),
 677                 OPT_CALLBACK(0, "signed-tags", &signed_tag_mode, N_("mode"),
 678                              N_("select handling of signed tags"),
 679                              parse_opt_signed_tag_mode),
 680                 OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode, N_("mode"),
 681                              N_("select handling of tags that tag filtered objects"),
 682                              parse_opt_tag_of_filtered_mode),
 683                 OPT_STRING(0, "export-marks", &export_filename, N_("file"),
 684                              N_("Dump marks to this file")),
 685                 OPT_STRING(0, "import-marks", &import_filename, N_("file"),
 686                              N_("Import marks from this file")),
 687                 OPT_BOOL(0, "fake-missing-tagger", &fake_missing_tagger,
 688                          N_("Fake a tagger when tags lack one")),
 689                 OPT_BOOL(0, "full-tree", &full_tree,
 690                          N_("Output full tree for each commit")),
 691                 OPT_BOOL(0, "use-done-feature", &use_done_feature,
 692                              N_("Use the done feature to terminate the stream")),
 693                 OPT_BOOL(0, "no-data", &no_data, N_("Skip output of blob data")),
 694                 OPT_END()
 695         };
 696
 697         if (argc == 1)
 698                 usage_with_options (fast_export_usage, options);
 699
 700         /* we handle encodings */
 701         git_config(git_default_config, NULL);
 702
 703         init_revisions(&revs, prefix);
 704         revs.topo_order = 1;
 705         revs.show_source = 1;
 706         revs.rewrite_parents = 1;
 707         argc = setup_revisions(argc, argv, &revs, NULL);
 708         argc = parse_options(argc, argv, prefix, options, fast_export_usage, 0);
 709         if (argc > 1)
 710                 usage_with_options (fast_export_usage, options);
 711
 712         if (use_done_feature)
 713                 printf("feature done\n");
 714
 715         if (import_filename)
 716                 import_marks(import_filename);
 717         lastimportid = last_idnum;
 718
 719         if (import_filename && revs.prune_data.nr)
 720                 full_tree = 1;
 721
 722         get_tags_and_duplicates(&revs.cmdline);
 723
 724         if (prepare_revision_walk(&revs))
 725                 die("revision walk setup failed");
 726         revs.diffopt.format_callback = show_filemodify;
 727         DIFF_OPT_SET(&revs.diffopt, RECURSIVE);
 728         while ((commit = get_revision(&revs))) {
 729                 if (has_unshown_parent(commit)) {
 730                         add_object_array(&commit->object, NULL, &commits);
 731                 }
 732                 else {
 733                         handle_commit(commit, &revs);
 734                         handle_tail(&commits, &revs);
 735                 }
 736         }
 737
 738         handle_tags_and_duplicates();
 739
 740         if (export_filename && lastimportid != last_idnum)
 741                 export_marks(export_filename);
 742
 743         if (use_done_feature)
 744                 printf("done\n");
 745
 746         return 0;
 747 }