Git 2.1
[git/git.git] / builtin / fast-export.c
CommitLineData
f2dc849e
JS
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"
c455c87c 16#include "string-list.h"
f2dc849e
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17#include "utf8.h"
18#include "parse-options.h"
6280dfdc 19#include "quote.h"
03e9010c 20#include "remote.h"
f2dc849e
JS
21
22static const char *fast_export_usage[] = {
3b787b96 23 N_("git fast-export [rev-list-opts]"),
f2dc849e
JS
24 NULL
25};
26
27static int progress;
cd16c59b 28static enum { ABORT, VERBATIM, WARN, WARN_STRIP, STRIP } signed_tag_mode = ABORT;
d7a10c31 29static enum { ERROR, DROP, REWRITE } tag_of_filtered_mode = ERROR;
4e46a8d6 30static int fake_missing_tagger;
82670a5c 31static int use_done_feature;
79559f27 32static int no_data;
7f40ab09 33static int full_tree;
1d844ee7 34static struct string_list extra_refs = STRING_LIST_INIT_NODUP;
03e9010c
FC
35static struct refspec *refspecs;
36static int refspecs_nr;
f2dc849e
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37
38static int parse_opt_signed_tag_mode(const struct option *opt,
39 const char *arg, int unset)
40{
41 if (unset || !strcmp(arg, "abort"))
42 signed_tag_mode = ABORT;
ee4bc371
JS
43 else if (!strcmp(arg, "verbatim") || !strcmp(arg, "ignore"))
44 signed_tag_mode = VERBATIM;
f2dc849e
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45 else if (!strcmp(arg, "warn"))
46 signed_tag_mode = WARN;
cd16c59b
JK
47 else if (!strcmp(arg, "warn-strip"))
48 signed_tag_mode = WARN_STRIP;
f2dc849e
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49 else if (!strcmp(arg, "strip"))
50 signed_tag_mode = STRIP;
51 else
04a74b6c 52 return error("Unknown signed-tags mode: %s", arg);
f2dc849e
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53 return 0;
54}
55
2d8ad469
EN
56static int parse_opt_tag_of_filtered_mode(const struct option *opt,
57 const char *arg, int unset)
58{
59 if (unset || !strcmp(arg, "abort"))
d7a10c31 60 tag_of_filtered_mode = ERROR;
2d8ad469
EN
61 else if (!strcmp(arg, "drop"))
62 tag_of_filtered_mode = DROP;
63 else if (!strcmp(arg, "rewrite"))
64 tag_of_filtered_mode = REWRITE;
65 else
66 return error("Unknown tag-of-filtered mode: %s", arg);
67 return 0;
68}
69
f2dc849e
JS
70static struct decoration idnums;
71static uint32_t last_idnum;
72
73static int has_unshown_parent(struct commit *commit)
74{
75 struct commit_list *parent;
76
77 for (parent = commit->parents; parent; parent = parent->next)
78 if (!(parent->item->object.flags & SHOWN) &&
79 !(parent->item->object.flags & UNINTERESTING))
80 return 1;
81 return 0;
82}
83
84/* Since intptr_t is C99, we do not use it here */
df6a7ff7 85static inline uint32_t *mark_to_ptr(uint32_t mark)
f2dc849e 86{
df6a7ff7
PB
87 return ((uint32_t *)NULL) + mark;
88}
89
90static inline uint32_t ptr_to_mark(void * mark)
91{
92 return (uint32_t *)mark - (uint32_t *)NULL;
93}
94
95static inline void mark_object(struct object *object, uint32_t mark)
96{
97 add_decoration(&idnums, object, mark_to_ptr(mark));
98}
99
100static inline void mark_next_object(struct object *object)
101{
102 mark_object(object, ++last_idnum);
f2dc849e
JS
103}
104
105static int get_object_mark(struct object *object)
106{
107 void *decoration = lookup_decoration(&idnums, object);
108 if (!decoration)
109 return 0;
df6a7ff7 110 return ptr_to_mark(decoration);
f2dc849e
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111}
112
113static void show_progress(void)
114{
115 static int counter = 0;
116 if (!progress)
117 return;
118 if ((++counter % progress) == 0)
119 printf("progress %d objects\n", counter);
120}
121
f9b54e26 122static void export_blob(const unsigned char *sha1)
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JS
123{
124 unsigned long size;
125 enum object_type type;
126 char *buf;
127 struct object *object;
30b939c3 128 int eaten;
f2dc849e 129
79559f27
GI
130 if (no_data)
131 return;
132
f2dc849e
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133 if (is_null_sha1(sha1))
134 return;
135
30b939c3
JK
136 object = lookup_object(sha1);
137 if (object && object->flags & SHOWN)
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138 return;
139
140 buf = read_sha1_file(sha1, &type, &size);
141 if (!buf)
142 die ("Could not read blob %s", sha1_to_hex(sha1));
30b939c3
JK
143 if (check_sha1_signature(sha1, buf, size, typename(type)) < 0)
144 die("sha1 mismatch in blob %s", sha1_to_hex(sha1));
145 object = parse_object_buffer(sha1, type, size, buf, &eaten);
146 if (!object)
147 die("Could not read blob %s", sha1_to_hex(sha1));
f2dc849e 148
df6a7ff7 149 mark_next_object(object);
f2dc849e 150
6e1c2344 151 printf("blob\nmark :%"PRIu32"\ndata %lu\n", last_idnum, size);
b0fe0d72 152 if (size && fwrite(buf, size, 1, stdout) != 1)
0721c314 153 die_errno ("Could not write blob '%s'", sha1_to_hex(sha1));
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154 printf("\n");
155
156 show_progress();
157
158 object->flags |= SHOWN;
30b939c3
JK
159 if (!eaten)
160 free(buf);
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161}
162
060df624
EN
163static int depth_first(const void *a_, const void *b_)
164{
165 const struct diff_filepair *a = *((const struct diff_filepair **)a_);
166 const struct diff_filepair *b = *((const struct diff_filepair **)b_);
167 const char *name_a, *name_b;
168 int len_a, len_b, len;
169 int cmp;
170
171 name_a = a->one ? a->one->path : a->two->path;
172 name_b = b->one ? b->one->path : b->two->path;
173
174 len_a = strlen(name_a);
175 len_b = strlen(name_b);
176 len = (len_a < len_b) ? len_a : len_b;
177
178 /* strcmp will sort 'd' before 'd/e', we want 'd/e' before 'd' */
179 cmp = memcmp(name_a, name_b, len);
180 if (cmp)
181 return cmp;
4ce6fb80
JS
182 cmp = len_b - len_a;
183 if (cmp)
184 return cmp;
185 /*
186 * Move 'R'ename entries last so that all references of the file
187 * appear in the output before it is renamed (e.g., when a file
188 * was copied and renamed in the same commit).
189 */
190 return (a->status == 'R') - (b->status == 'R');
060df624
EN
191}
192
6280dfdc
JK
193static void print_path(const char *path)
194{
195 int need_quote = quote_c_style(path, NULL, NULL, 0);
196 if (need_quote)
197 quote_c_style(path, NULL, stdout, 0);
ff59f6da
JS
198 else if (strchr(path, ' '))
199 printf("\"%s\"", path);
6280dfdc
JK
200 else
201 printf("%s", path);
202}
203
f2dc849e
JS
204static void show_filemodify(struct diff_queue_struct *q,
205 struct diff_options *options, void *data)
206{
207 int i;
060df624
EN
208
209 /*
210 * Handle files below a directory first, in case they are all deleted
211 * and the directory changes to a file or symlink.
212 */
213 qsort(q->queue, q->nr, sizeof(q->queue[0]), depth_first);
214
f2dc849e 215 for (i = 0; i < q->nr; i++) {
ae7c5dce 216 struct diff_filespec *ospec = q->queue[i]->one;
f2dc849e 217 struct diff_filespec *spec = q->queue[i]->two;
ae7c5dce
AG
218
219 switch (q->queue[i]->status) {
220 case DIFF_STATUS_DELETED:
6280dfdc
JK
221 printf("D ");
222 print_path(spec->path);
223 putchar('\n');
ae7c5dce
AG
224 break;
225
226 case DIFF_STATUS_COPIED:
227 case DIFF_STATUS_RENAMED:
6280dfdc
JK
228 printf("%c ", q->queue[i]->status);
229 print_path(ospec->path);
230 putchar(' ');
231 print_path(spec->path);
232 putchar('\n');
ae7c5dce
AG
233
234 if (!hashcmp(ospec->sha1, spec->sha1) &&
235 ospec->mode == spec->mode)
236 break;
237 /* fallthrough */
238
239 case DIFF_STATUS_TYPE_CHANGED:
240 case DIFF_STATUS_MODIFIED:
241 case DIFF_STATUS_ADDED:
03db4525
AG
242 /*
243 * Links refer to objects in another repositories;
244 * output the SHA-1 verbatim.
245 */
79559f27 246 if (no_data || S_ISGITLINK(spec->mode))
6280dfdc
JK
247 printf("M %06o %s ", spec->mode,
248 sha1_to_hex(spec->sha1));
03db4525
AG
249 else {
250 struct object *object = lookup_object(spec->sha1);
6280dfdc
JK
251 printf("M %06o :%d ", spec->mode,
252 get_object_mark(object));
03db4525 253 }
6280dfdc
JK
254 print_path(spec->path);
255 putchar('\n');
ae7c5dce
AG
256 break;
257
258 default:
259 die("Unexpected comparison status '%c' for %s, %s",
260 q->queue[i]->status,
261 ospec->path ? ospec->path : "none",
262 spec->path ? spec->path : "none");
f2dc849e
JS
263 }
264 }
265}
266
267static const char *find_encoding(const char *begin, const char *end)
268{
269 const char *needle = "\nencoding ";
270 char *bol, *eol;
271
272 bol = memmem(begin, end ? end - begin : strlen(begin),
273 needle, strlen(needle));
274 if (!bol)
275 return git_commit_encoding;
276 bol += strlen(needle);
277 eol = strchrnul(bol, '\n');
278 *eol = '\0';
279 return bol;
280}
281
282static void handle_commit(struct commit *commit, struct rev_info *rev)
283{
284 int saved_output_format = rev->diffopt.output_format;
bc6b8fc1 285 const char *commit_buffer;
f2dc849e
JS
286 const char *author, *author_end, *committer, *committer_end;
287 const char *encoding, *message;
288 char *reencoded = NULL;
289 struct commit_list *p;
290 int i;
291
292 rev->diffopt.output_format = DIFF_FORMAT_CALLBACK;
293
683ff884 294 parse_commit_or_die(commit);
8597ea3a 295 commit_buffer = get_commit_buffer(commit, NULL);
bc6b8fc1 296 author = strstr(commit_buffer, "\nauthor ");
f2dc849e
JS
297 if (!author)
298 die ("Could not find author in commit %s",
299 sha1_to_hex(commit->object.sha1));
300 author++;
301 author_end = strchrnul(author, '\n');
302 committer = strstr(author_end, "\ncommitter ");
303 if (!committer)
304 die ("Could not find committer in commit %s",
305 sha1_to_hex(commit->object.sha1));
306 committer++;
307 committer_end = strchrnul(committer, '\n');
308 message = strstr(committer_end, "\n\n");
309 encoding = find_encoding(committer_end, message);
310 if (message)
311 message += 2;
312
ebeec7db 313 if (commit->parents &&
4087a02e
EN
314 get_object_mark(&commit->parents->item->object) != 0 &&
315 !full_tree) {
683ff884 316 parse_commit_or_die(commit->parents->item);
f2dc849e
JS
317 diff_tree_sha1(commit->parents->item->tree->object.sha1,
318 commit->tree->object.sha1, "", &rev->diffopt);
319 }
320 else
321 diff_root_tree_sha1(commit->tree->object.sha1,
322 "", &rev->diffopt);
323
03db4525 324 /* Export the referenced blobs, and remember the marks. */
f2dc849e 325 for (i = 0; i < diff_queued_diff.nr; i++)
03db4525 326 if (!S_ISGITLINK(diff_queued_diff.queue[i]->two->mode))
f9b54e26 327 export_blob(diff_queued_diff.queue[i]->two->sha1);
f2dc849e 328
df6a7ff7 329 mark_next_object(&commit->object);
f2dc849e
JS
330 if (!is_encoding_utf8(encoding))
331 reencoded = reencode_string(message, "UTF-8", encoding);
d8933f01
SP
332 if (!commit->parents)
333 printf("reset %s\n", (const char*)commit->util);
6e1c2344 334 printf("commit %s\nmark :%"PRIu32"\n%.*s\n%.*s\ndata %u\n%s",
f2dc849e
JS
335 (const char *)commit->util, last_idnum,
336 (int)(author_end - author), author,
337 (int)(committer_end - committer), committer,
338 (unsigned)(reencoded
339 ? strlen(reencoded) : message
340 ? strlen(message) : 0),
341 reencoded ? reencoded : message ? message : "");
8e0f7003 342 free(reencoded);
bc6b8fc1 343 unuse_commit_buffer(commit, commit_buffer);
f2dc849e
JS
344
345 for (i = 0, p = commit->parents; p; p = p->next) {
346 int mark = get_object_mark(&p->item->object);
347 if (!mark)
348 continue;
349 if (i == 0)
350 printf("from :%d\n", mark);
f2dc849e 351 else
5070b49e 352 printf("merge :%d\n", mark);
f2dc849e
JS
353 i++;
354 }
f2dc849e 355
4087a02e
EN
356 if (full_tree)
357 printf("deleteall\n");
f2dc849e
JS
358 log_tree_diff_flush(rev);
359 rev->diffopt.output_format = saved_output_format;
360
361 printf("\n");
362
363 show_progress();
364}
365
366static void handle_tail(struct object_array *commits, struct rev_info *revs)
367{
368 struct commit *commit;
369 while (commits->nr) {
370 commit = (struct commit *)commits->objects[commits->nr - 1].item;
371 if (has_unshown_parent(commit))
372 return;
373 handle_commit(commit, revs);
374 commits->nr--;
375 }
376}
377
378static void handle_tag(const char *name, struct tag *tag)
379{
380 unsigned long size;
381 enum object_type type;
382 char *buf;
383 const char *tagger, *tagger_end, *message;
384 size_t message_size = 0;
02c48cd6 385 struct object *tagged;
2d8ad469
EN
386 int tagged_mark;
387 struct commit *p;
02c48cd6 388
98e023de 389 /* Trees have no identifier in fast-export output, thus we have no way
02c48cd6
EN
390 * to output tags of trees, tags of tags of trees, etc. Simply omit
391 * such tags.
392 */
393 tagged = tag->tagged;
394 while (tagged->type == OBJ_TAG) {
395 tagged = ((struct tag *)tagged)->tagged;
396 }
397 if (tagged->type == OBJ_TREE) {
398 warning("Omitting tag %s,\nsince tags of trees (or tags of tags of trees, etc.) are not supported.",
399 sha1_to_hex(tag->object.sha1));
400 return;
401 }
f2dc849e
JS
402
403 buf = read_sha1_file(tag->object.sha1, &type, &size);
404 if (!buf)
405 die ("Could not read tag %s", sha1_to_hex(tag->object.sha1));
406 message = memmem(buf, size, "\n\n", 2);
407 if (message) {
408 message += 2;
409 message_size = strlen(message);
410 }
411 tagger = memmem(buf, message ? message - buf : size, "\ntagger ", 8);
4e46a8d6
JS
412 if (!tagger) {
413 if (fake_missing_tagger)
414 tagger = "tagger Unspecified Tagger "
415 "<unspecified-tagger> 0 +0000";
416 else
417 tagger = "";
418 tagger_end = tagger + strlen(tagger);
419 } else {
420 tagger++;
421 tagger_end = strchrnul(tagger, '\n');
422 }
f2dc849e
JS
423
424 /* handle signed tags */
425 if (message) {
426 const char *signature = strstr(message,
427 "\n-----BEGIN PGP SIGNATURE-----\n");
428 if (signature)
429 switch(signed_tag_mode) {
430 case ABORT:
431 die ("Encountered signed tag %s; use "
04a74b6c 432 "--signed-tags=<mode> to handle it.",
f2dc849e
JS
433 sha1_to_hex(tag->object.sha1));
434 case WARN:
435 warning ("Exporting signed tag %s",
436 sha1_to_hex(tag->object.sha1));
437 /* fallthru */
ee4bc371 438 case VERBATIM:
f2dc849e 439 break;
cd16c59b
JK
440 case WARN_STRIP:
441 warning ("Stripping signature from tag %s",
442 sha1_to_hex(tag->object.sha1));
443 /* fallthru */
f2dc849e
JS
444 case STRIP:
445 message_size = signature + 1 - message;
446 break;
447 }
448 }
449
2d8ad469
EN
450 /* handle tag->tagged having been filtered out due to paths specified */
451 tagged = tag->tagged;
452 tagged_mark = get_object_mark(tagged);
453 if (!tagged_mark) {
454 switch(tag_of_filtered_mode) {
455 case ABORT:
456 die ("Tag %s tags unexported object; use "
457 "--tag-of-filtered-object=<mode> to handle it.",
458 sha1_to_hex(tag->object.sha1));
459 case DROP:
460 /* Ignore this tag altogether */
461 return;
462 case REWRITE:
463 if (tagged->type != OBJ_COMMIT) {
464 die ("Tag %s tags unexported %s!",
465 sha1_to_hex(tag->object.sha1),
466 typename(tagged->type));
467 }
468 p = (struct commit *)tagged;
469 for (;;) {
470 if (p->parents && p->parents->next)
471 break;
472 if (p->object.flags & UNINTERESTING)
473 break;
474 if (!(p->object.flags & TREESAME))
475 break;
476 if (!p->parents)
477 die ("Can't find replacement commit for tag %s\n",
478 sha1_to_hex(tag->object.sha1));
479 p = p->parents->item;
480 }
481 tagged_mark = get_object_mark(&p->object);
482 }
483 }
484
59556548 485 if (starts_with(name, "refs/tags/"))
f2dc849e 486 name += 10;
4e46a8d6 487 printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
2d8ad469 488 name, tagged_mark,
f2dc849e 489 (int)(tagger_end - tagger), tagger,
4e46a8d6 490 tagger == tagger_end ? "" : "\n",
f2dc849e
JS
491 (int)message_size, (int)message_size, message ? message : "");
492}
493
3e9b9cb1
FC
494static struct commit *get_commit(struct rev_cmdline_entry *e, char *full_name)
495{
496 switch (e->item->type) {
497 case OBJ_COMMIT:
498 return (struct commit *)e->item;
499 case OBJ_TAG: {
500 struct tag *tag = (struct tag *)e->item;
501
502 /* handle nested tags */
503 while (tag && tag->object.type == OBJ_TAG) {
504 parse_object(tag->object.sha1);
505 string_list_append(&extra_refs, full_name)->util = tag;
506 tag = (struct tag *)tag->tagged;
507 }
508 if (!tag)
509 die("Tag %s points nowhere?", e->name);
510 return (struct commit *)tag;
511 break;
512 }
513 default:
514 return NULL;
515 }
516}
517
1d844ee7 518static void get_tags_and_duplicates(struct rev_cmdline_info *info)
f2dc849e 519{
f2dc849e
JS
520 int i;
521
49266e8a
FC
522 for (i = 0; i < info->nr; i++) {
523 struct rev_cmdline_entry *e = info->rev + i;
f2dc849e 524 unsigned char sha1[20];
2d242de4 525 struct commit *commit;
f2dc849e
JS
526 char *full_name;
527
49266e8a
FC
528 if (e->flags & UNINTERESTING)
529 continue;
530
f2dc849e
JS
531 if (dwim_ref(e->name, strlen(e->name), sha1, &full_name) != 1)
532 continue;
533
03e9010c
FC
534 if (refspecs) {
535 char *private;
536 private = apply_refspecs(refspecs, refspecs_nr, full_name);
537 if (private) {
538 free(full_name);
539 full_name = private;
540 }
541 }
542
3e9b9cb1
FC
543 commit = get_commit(e, full_name);
544 if (!commit) {
2d07f6d4
EFL
545 warning("%s: Unexpected object of type %s, skipping.",
546 e->name,
547 typename(e->item->type));
548 continue;
f2dc849e 549 }
f28e7c90 550
3e9b9cb1
FC
551 switch(commit->object.type) {
552 case OBJ_COMMIT:
553 break;
554 case OBJ_BLOB:
555 export_blob(commit->object.sha1);
556 continue;
557 default: /* OBJ_TAG (nested tags) is already handled */
558 warning("Tag points to object of unexpected type %s, skipping.",
559 typename(commit->object.type));
560 continue;
561 }
562
f28e7c90
FC
563 /*
564 * This ref will not be updated through a commit, lets make
565 * sure it gets properly updated eventually.
566 */
567 if (commit->util || commit->object.flags & SHOWN)
1d844ee7 568 string_list_append(&extra_refs, full_name)->util = commit;
f28e7c90 569 if (!commit->util)
f2dc849e
JS
570 commit->util = full_name;
571 }
572}
573
1d844ee7 574static void handle_tags_and_duplicates(void)
f2dc849e
JS
575{
576 struct commit *commit;
577 int i;
578
1d844ee7
FC
579 for (i = extra_refs.nr - 1; i >= 0; i--) {
580 const char *name = extra_refs.items[i].string;
581 struct object *object = extra_refs.items[i].util;
f2dc849e
JS
582 switch (object->type) {
583 case OBJ_TAG:
584 handle_tag(name, (struct tag *)object);
585 break;
586 case OBJ_COMMIT:
587 /* create refs pointing to already seen commits */
588 commit = (struct commit *)object;
589 printf("reset %s\nfrom :%d\n\n", name,
590 get_object_mark(&commit->object));
591 show_progress();
592 break;
593 }
594 }
595}
596
df6a7ff7
PB
597static void export_marks(char *file)
598{
599 unsigned int i;
600 uint32_t mark;
601 struct object_decoration *deco = idnums.hash;
602 FILE *f;
96d69b55 603 int e = 0;
df6a7ff7
PB
604
605 f = fopen(file, "w");
606 if (!f)
bb6ad28c 607 die_errno("Unable to open marks file %s for writing.", file);
df6a7ff7 608
69913575
JH
609 for (i = 0; i < idnums.size; i++) {
610 if (deco->base && deco->base->type == 1) {
df6a7ff7 611 mark = ptr_to_mark(deco->decoration);
96d69b55
MA
612 if (fprintf(f, ":%"PRIu32" %s\n", mark,
613 sha1_to_hex(deco->base->sha1)) < 0) {
614 e = 1;
615 break;
616 }
df6a7ff7 617 }
69913575 618 deco++;
df6a7ff7
PB
619 }
620
96d69b55
MA
621 e |= ferror(f);
622 e |= fclose(f);
623 if (e)
df6a7ff7
PB
624 error("Unable to write marks file %s.", file);
625}
626
69913575 627static void import_marks(char *input_file)
df6a7ff7
PB
628{
629 char line[512];
630 FILE *f = fopen(input_file, "r");
631 if (!f)
d824cbba 632 die_errno("cannot read '%s'", input_file);
df6a7ff7
PB
633
634 while (fgets(line, sizeof(line), f)) {
635 uint32_t mark;
636 char *line_end, *mark_end;
637 unsigned char sha1[20];
638 struct object *object;
47bd9bf8 639 struct commit *commit;
e6812cfa 640 enum object_type type;
df6a7ff7
PB
641
642 line_end = strchr(line, '\n');
643 if (line[0] != ':' || !line_end)
644 die("corrupt mark line: %s", line);
69913575 645 *line_end = '\0';
df6a7ff7
PB
646
647 mark = strtoumax(line + 1, &mark_end, 10);
648 if (!mark || mark_end == line + 1
45c5d4a5 649 || *mark_end != ' ' || get_sha1_hex(mark_end + 1, sha1))
df6a7ff7
PB
650 die("corrupt mark line: %s", line);
651
c4458ecd
AP
652 if (last_idnum < mark)
653 last_idnum = mark;
654
e6812cfa
FC
655 type = sha1_object_info(sha1, NULL);
656 if (type < 0)
657 die("object not found: %s", sha1_to_hex(sha1));
658
659 if (type != OBJ_COMMIT)
660 /* only commits */
c4458ecd 661 continue;
df6a7ff7 662
47bd9bf8
FC
663 commit = lookup_commit(sha1);
664 if (!commit)
665 die("not a commit? can't happen: %s", sha1_to_hex(sha1));
666
667 object = &commit->object;
e6812cfa 668
df6a7ff7 669 if (object->flags & SHOWN)
43bc2302 670 error("Object %s already has a mark", sha1_to_hex(sha1));
df6a7ff7
PB
671
672 mark_object(object, mark);
df6a7ff7
PB
673
674 object->flags |= SHOWN;
675 }
676 fclose(f);
677}
678
60ed2643
FC
679static void handle_deletes(void)
680{
681 int i;
682 for (i = 0; i < refspecs_nr; i++) {
683 struct refspec *refspec = &refspecs[i];
684 if (*refspec->src)
685 continue;
686
687 printf("reset %s\nfrom %s\n\n",
688 refspec->dst, sha1_to_hex(null_sha1));
689 }
690}
691
f2dc849e
JS
692int cmd_fast_export(int argc, const char **argv, const char *prefix)
693{
694 struct rev_info revs;
3cd47459 695 struct object_array commits = OBJECT_ARRAY_INIT;
f2dc849e 696 struct commit *commit;
df6a7ff7 697 char *export_filename = NULL, *import_filename = NULL;
c4458ecd 698 uint32_t lastimportid;
03e9010c 699 struct string_list refspecs_list = STRING_LIST_INIT_NODUP;
f2dc849e
JS
700 struct option options[] = {
701 OPT_INTEGER(0, "progress", &progress,
3b787b96
NTND
702 N_("show progress after <n> objects")),
703 OPT_CALLBACK(0, "signed-tags", &signed_tag_mode, N_("mode"),
704 N_("select handling of signed tags"),
f2dc849e 705 parse_opt_signed_tag_mode),
3b787b96
NTND
706 OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode, N_("mode"),
707 N_("select handling of tags that tag filtered objects"),
2d8ad469 708 parse_opt_tag_of_filtered_mode),
3b787b96
NTND
709 OPT_STRING(0, "export-marks", &export_filename, N_("file"),
710 N_("Dump marks to this file")),
711 OPT_STRING(0, "import-marks", &import_filename, N_("file"),
712 N_("Import marks from this file")),
d5d09d47
SB
713 OPT_BOOL(0, "fake-missing-tagger", &fake_missing_tagger,
714 N_("Fake a tagger when tags lack one")),
715 OPT_BOOL(0, "full-tree", &full_tree,
716 N_("Output full tree for each commit")),
717 OPT_BOOL(0, "use-done-feature", &use_done_feature,
3b787b96
NTND
718 N_("Use the done feature to terminate the stream")),
719 OPT_BOOL(0, "no-data", &no_data, N_("Skip output of blob data")),
03e9010c
FC
720 OPT_STRING_LIST(0, "refspec", &refspecs_list, N_("refspec"),
721 N_("Apply refspec to exported refs")),
f2dc849e
JS
722 OPT_END()
723 };
724
dcfdbdf0
MV
725 if (argc == 1)
726 usage_with_options (fast_export_usage, options);
727
f2dc849e 728 /* we handle encodings */
ef90d6d4 729 git_config(git_default_config, NULL);
f2dc849e
JS
730
731 init_revisions(&revs, prefix);
668f3aa7 732 revs.topo_order = 1;
2374502c 733 revs.show_source = 1;
32164131 734 revs.rewrite_parents = 1;
8b2f86a7
FC
735 argc = parse_options(argc, argv, prefix, options, fast_export_usage,
736 PARSE_OPT_KEEP_ARGV0 | PARSE_OPT_KEEP_UNKNOWN);
f2dc849e 737 argc = setup_revisions(argc, argv, &revs, NULL);
f2dc849e
JS
738 if (argc > 1)
739 usage_with_options (fast_export_usage, options);
740
03e9010c
FC
741 if (refspecs_list.nr) {
742 const char **refspecs_str;
743 int i;
744
745 refspecs_str = xmalloc(sizeof(*refspecs_str) * refspecs_list.nr);
746 for (i = 0; i < refspecs_list.nr; i++)
747 refspecs_str[i] = refspecs_list.items[i].string;
748
749 refspecs_nr = refspecs_list.nr;
750 refspecs = parse_fetch_refspec(refspecs_nr, refspecs_str);
751
752 string_list_clear(&refspecs_list, 1);
753 free(refspecs_str);
754 }
755
82670a5c
SR
756 if (use_done_feature)
757 printf("feature done\n");
758
df6a7ff7
PB
759 if (import_filename)
760 import_marks(import_filename);
c4458ecd 761 lastimportid = last_idnum;
df6a7ff7 762
afe069d1 763 if (import_filename && revs.prune_data.nr)
4087a02e
EN
764 full_tree = 1;
765
1d844ee7 766 get_tags_and_duplicates(&revs.cmdline);
f2dc849e 767
3d51e1b5
MK
768 if (prepare_revision_walk(&revs))
769 die("revision walk setup failed");
f2dc849e
JS
770 revs.diffopt.format_callback = show_filemodify;
771 DIFF_OPT_SET(&revs.diffopt, RECURSIVE);
772 while ((commit = get_revision(&revs))) {
773 if (has_unshown_parent(commit)) {
f2dc849e 774 add_object_array(&commit->object, NULL, &commits);
f2dc849e
JS
775 }
776 else {
777 handle_commit(commit, &revs);
778 handle_tail(&commits, &revs);
779 }
780 }
781
1d844ee7 782 handle_tags_and_duplicates();
60ed2643 783 handle_deletes();
f2dc849e 784
c4458ecd 785 if (export_filename && lastimportid != last_idnum)
df6a7ff7
PB
786 export_marks(export_filename);
787
82670a5c
SR
788 if (use_done_feature)
789 printf("done\n");
790
03e9010c
FC
791 free_refspec(refspecs_nr, refspecs);
792
f2dc849e
JS
793 return 0;
794}