2 * "git fast-export" builtin command
4 * Copyright (C) 2007 Johannes E. Schindelin
11 #include "object-store.h"
20 #include "string-list.h"
22 #include "parse-options.h"
26 #include "commit-slab.h"
28 static const char *fast_export_usage
[] = {
29 N_("git fast-export [rev-list-opts]"),
34 static enum { ABORT
, VERBATIM
, WARN
, WARN_STRIP
, STRIP
} signed_tag_mode
= ABORT
;
35 static enum { ERROR
, DROP
, REWRITE
} tag_of_filtered_mode
= ERROR
;
36 static int fake_missing_tagger
;
37 static int use_done_feature
;
40 static struct string_list extra_refs
= STRING_LIST_INIT_NODUP
;
41 static struct refspec refspecs
= REFSPEC_INIT_FETCH
;
43 static struct revision_sources revision_sources
;
45 static int parse_opt_signed_tag_mode(const struct option
*opt
,
46 const char *arg
, int unset
)
48 if (unset
|| !strcmp(arg
, "abort"))
49 signed_tag_mode
= ABORT
;
50 else if (!strcmp(arg
, "verbatim") || !strcmp(arg
, "ignore"))
51 signed_tag_mode
= VERBATIM
;
52 else if (!strcmp(arg
, "warn"))
53 signed_tag_mode
= WARN
;
54 else if (!strcmp(arg
, "warn-strip"))
55 signed_tag_mode
= WARN_STRIP
;
56 else if (!strcmp(arg
, "strip"))
57 signed_tag_mode
= STRIP
;
59 return error("Unknown signed-tags mode: %s", arg
);
63 static int parse_opt_tag_of_filtered_mode(const struct option
*opt
,
64 const char *arg
, int unset
)
66 if (unset
|| !strcmp(arg
, "abort"))
67 tag_of_filtered_mode
= ERROR
;
68 else if (!strcmp(arg
, "drop"))
69 tag_of_filtered_mode
= DROP
;
70 else if (!strcmp(arg
, "rewrite"))
71 tag_of_filtered_mode
= REWRITE
;
73 return error("Unknown tag-of-filtered mode: %s", arg
);
77 static struct decoration idnums
;
78 static uint32_t last_idnum
;
80 static int has_unshown_parent(struct commit
*commit
)
82 struct commit_list
*parent
;
84 for (parent
= commit
->parents
; parent
; parent
= parent
->next
)
85 if (!(parent
->item
->object
.flags
& SHOWN
) &&
86 !(parent
->item
->object
.flags
& UNINTERESTING
))
91 struct anonymized_entry
{
92 struct hashmap_entry hash
;
99 static int anonymized_entry_cmp(const void *unused_cmp_data
,
100 const void *va
, const void *vb
,
101 const void *unused_keydata
)
103 const struct anonymized_entry
*a
= va
, *b
= vb
;
104 return a
->orig_len
!= b
->orig_len
||
105 memcmp(a
->orig
, b
->orig
, a
->orig_len
);
109 * Basically keep a cache of X->Y so that we can repeatedly replace
110 * the same anonymized string with another. The actual generation
111 * is farmed out to the generate function.
113 static const void *anonymize_mem(struct hashmap
*map
,
114 void *(*generate
)(const void *, size_t *),
115 const void *orig
, size_t *len
)
117 struct anonymized_entry key
, *ret
;
120 hashmap_init(map
, anonymized_entry_cmp
, NULL
, 0);
122 hashmap_entry_init(&key
, memhash(orig
, *len
));
125 ret
= hashmap_get(map
, &key
, NULL
);
128 ret
= xmalloc(sizeof(*ret
));
129 hashmap_entry_init(&ret
->hash
, key
.hash
.hash
);
130 ret
->orig
= xstrdup(orig
);
131 ret
->orig_len
= *len
;
132 ret
->anon
= generate(orig
, len
);
133 ret
->anon_len
= *len
;
134 hashmap_put(map
, ret
);
137 *len
= ret
->anon_len
;
142 * We anonymize each component of a path individually,
143 * so that paths a/b and a/c will share a common root.
144 * The paths are cached via anonymize_mem so that repeated
145 * lookups for "a" will yield the same value.
147 static void anonymize_path(struct strbuf
*out
, const char *path
,
149 void *(*generate
)(const void *, size_t *))
152 const char *end_of_component
= strchrnul(path
, '/');
153 size_t len
= end_of_component
- path
;
154 const char *c
= anonymize_mem(map
, generate
, path
, &len
);
155 strbuf_add(out
, c
, len
);
156 path
= end_of_component
;
158 strbuf_addch(out
, *path
++);
162 static inline void *mark_to_ptr(uint32_t mark
)
164 return (void *)(uintptr_t)mark
;
167 static inline uint32_t ptr_to_mark(void * mark
)
169 return (uint32_t)(uintptr_t)mark
;
172 static inline void mark_object(struct object
*object
, uint32_t mark
)
174 add_decoration(&idnums
, object
, mark_to_ptr(mark
));
177 static inline void mark_next_object(struct object
*object
)
179 mark_object(object
, ++last_idnum
);
182 static int get_object_mark(struct object
*object
)
184 void *decoration
= lookup_decoration(&idnums
, object
);
187 return ptr_to_mark(decoration
);
190 static void show_progress(void)
192 static int counter
= 0;
195 if ((++counter
% progress
) == 0)
196 printf("progress %d objects\n", counter
);
200 * Ideally we would want some transformation of the blob data here
201 * that is unreversible, but would still be the same size and have
202 * the same data relationship to other blobs (so that we get the same
203 * delta and packing behavior as the original). But the first and last
204 * requirements there are probably mutually exclusive, so let's take
205 * the easy way out for now, and just generate arbitrary content.
207 * There's no need to cache this result with anonymize_mem, since
208 * we already handle blob content caching with marks.
210 static char *anonymize_blob(unsigned long *size
)
213 struct strbuf out
= STRBUF_INIT
;
214 strbuf_addf(&out
, "anonymous blob %d", counter
++);
216 return strbuf_detach(&out
, NULL
);
219 static void export_blob(const struct object_id
*oid
)
222 enum object_type type
;
224 struct object
*object
;
230 if (is_null_oid(oid
))
233 object
= lookup_object(oid
->hash
);
234 if (object
&& object
->flags
& SHOWN
)
238 buf
= anonymize_blob(&size
);
239 object
= (struct object
*)lookup_blob(oid
);
242 buf
= read_object_file(oid
, &type
, &size
);
244 die ("Could not read blob %s", oid_to_hex(oid
));
245 if (check_object_signature(oid
, buf
, size
, type_name(type
)) < 0)
246 die("sha1 mismatch in blob %s", oid_to_hex(oid
));
247 object
= parse_object_buffer(oid
, type
, size
, buf
, &eaten
);
251 die("Could not read blob %s", oid_to_hex(oid
));
253 mark_next_object(object
);
255 printf("blob\nmark :%"PRIu32
"\ndata %lu\n", last_idnum
, size
);
256 if (size
&& fwrite(buf
, size
, 1, stdout
) != 1)
257 die_errno ("Could not write blob '%s'", oid_to_hex(oid
));
262 object
->flags
|= SHOWN
;
267 static int depth_first(const void *a_
, const void *b_
)
269 const struct diff_filepair
*a
= *((const struct diff_filepair
**)a_
);
270 const struct diff_filepair
*b
= *((const struct diff_filepair
**)b_
);
271 const char *name_a
, *name_b
;
272 int len_a
, len_b
, len
;
275 name_a
= a
->one
? a
->one
->path
: a
->two
->path
;
276 name_b
= b
->one
? b
->one
->path
: b
->two
->path
;
278 len_a
= strlen(name_a
);
279 len_b
= strlen(name_b
);
280 len
= (len_a
< len_b
) ? len_a
: len_b
;
282 /* strcmp will sort 'd' before 'd/e', we want 'd/e' before 'd' */
283 cmp
= memcmp(name_a
, name_b
, len
);
290 * Move 'R'ename entries last so that all references of the file
291 * appear in the output before it is renamed (e.g., when a file
292 * was copied and renamed in the same commit).
294 return (a
->status
== 'R') - (b
->status
== 'R');
297 static void print_path_1(const char *path
)
299 int need_quote
= quote_c_style(path
, NULL
, NULL
, 0);
301 quote_c_style(path
, NULL
, stdout
, 0);
302 else if (strchr(path
, ' '))
303 printf("\"%s\"", path
);
308 static void *anonymize_path_component(const void *path
, size_t *len
)
311 struct strbuf out
= STRBUF_INIT
;
312 strbuf_addf(&out
, "path%d", counter
++);
313 return strbuf_detach(&out
, len
);
316 static void print_path(const char *path
)
321 static struct hashmap paths
;
322 static struct strbuf anon
= STRBUF_INIT
;
324 anonymize_path(&anon
, path
, &paths
, anonymize_path_component
);
325 print_path_1(anon
.buf
);
330 static void *generate_fake_oid(const void *old
, size_t *len
)
332 static uint32_t counter
= 1; /* avoid null sha1 */
333 unsigned char *out
= xcalloc(GIT_SHA1_RAWSZ
, 1);
334 put_be32(out
+ GIT_SHA1_RAWSZ
- 4, counter
++);
338 static const unsigned char *anonymize_sha1(const struct object_id
*oid
)
340 static struct hashmap sha1s
;
341 size_t len
= GIT_SHA1_RAWSZ
;
342 return anonymize_mem(&sha1s
, generate_fake_oid
, oid
, &len
);
345 static void show_filemodify(struct diff_queue_struct
*q
,
346 struct diff_options
*options
, void *data
)
349 struct string_list
*changed
= data
;
352 * Handle files below a directory first, in case they are all deleted
353 * and the directory changes to a file or symlink.
355 QSORT(q
->queue
, q
->nr
, depth_first
);
357 for (i
= 0; i
< q
->nr
; i
++) {
358 struct diff_filespec
*ospec
= q
->queue
[i
]->one
;
359 struct diff_filespec
*spec
= q
->queue
[i
]->two
;
361 switch (q
->queue
[i
]->status
) {
362 case DIFF_STATUS_DELETED
:
364 print_path(spec
->path
);
365 string_list_insert(changed
, spec
->path
);
369 case DIFF_STATUS_COPIED
:
370 case DIFF_STATUS_RENAMED
:
372 * If a change in the file corresponding to ospec->path
373 * has been observed, we cannot trust its contents
374 * because the diff is calculated based on the prior
375 * contents, not the current contents. So, declare a
376 * copy or rename only if there was no change observed.
378 if (!string_list_has_string(changed
, ospec
->path
)) {
379 printf("%c ", q
->queue
[i
]->status
);
380 print_path(ospec
->path
);
382 print_path(spec
->path
);
383 string_list_insert(changed
, spec
->path
);
386 if (!oidcmp(&ospec
->oid
, &spec
->oid
) &&
387 ospec
->mode
== spec
->mode
)
392 case DIFF_STATUS_TYPE_CHANGED
:
393 case DIFF_STATUS_MODIFIED
:
394 case DIFF_STATUS_ADDED
:
396 * Links refer to objects in another repositories;
397 * output the SHA-1 verbatim.
399 if (no_data
|| S_ISGITLINK(spec
->mode
))
400 printf("M %06o %s ", spec
->mode
,
401 sha1_to_hex(anonymize
?
402 anonymize_sha1(&spec
->oid
) :
405 struct object
*object
= lookup_object(spec
->oid
.hash
);
406 printf("M %06o :%d ", spec
->mode
,
407 get_object_mark(object
));
409 print_path(spec
->path
);
410 string_list_insert(changed
, spec
->path
);
415 die("Unexpected comparison status '%c' for %s, %s",
417 ospec
->path
? ospec
->path
: "none",
418 spec
->path
? spec
->path
: "none");
423 static const char *find_encoding(const char *begin
, const char *end
)
425 const char *needle
= "\nencoding ";
428 bol
= memmem(begin
, end
? end
- begin
: strlen(begin
),
429 needle
, strlen(needle
));
431 return git_commit_encoding
;
432 bol
+= strlen(needle
);
433 eol
= strchrnul(bol
, '\n');
438 static void *anonymize_ref_component(const void *old
, size_t *len
)
441 struct strbuf out
= STRBUF_INIT
;
442 strbuf_addf(&out
, "ref%d", counter
++);
443 return strbuf_detach(&out
, len
);
446 static const char *anonymize_refname(const char *refname
)
449 * If any of these prefixes is found, we will leave it intact
450 * so that tags remain tags and so forth.
452 static const char *prefixes
[] = {
458 static struct hashmap refs
;
459 static struct strbuf anon
= STRBUF_INIT
;
463 * We also leave "master" as a special case, since it does not reveal
464 * anything interesting.
466 if (!strcmp(refname
, "refs/heads/master"))
470 for (i
= 0; i
< ARRAY_SIZE(prefixes
); i
++) {
471 if (skip_prefix(refname
, prefixes
[i
], &refname
)) {
472 strbuf_addstr(&anon
, prefixes
[i
]);
477 anonymize_path(&anon
, refname
, &refs
, anonymize_ref_component
);
482 * We do not even bother to cache commit messages, as they are unlikely
483 * to be repeated verbatim, and it is not that interesting when they are.
485 static char *anonymize_commit_message(const char *old
)
488 return xstrfmt("subject %d\n\nbody\n", counter
++);
491 static struct hashmap idents
;
492 static void *anonymize_ident(const void *old
, size_t *len
)
495 struct strbuf out
= STRBUF_INIT
;
496 strbuf_addf(&out
, "User %d <user%d@example.com>", counter
, counter
);
498 return strbuf_detach(&out
, len
);
502 * Our strategy here is to anonymize the names and email addresses,
503 * but keep timestamps intact, as they influence things like traversal
504 * order (and by themselves should not be too revealing).
506 static void anonymize_ident_line(const char **beg
, const char **end
)
508 static struct strbuf buffers
[] = { STRBUF_INIT
, STRBUF_INIT
};
509 static unsigned which_buffer
;
512 struct ident_split split
;
513 const char *end_of_header
;
515 out
= &buffers
[which_buffer
++];
516 which_buffer
%= ARRAY_SIZE(buffers
);
519 /* skip "committer", "author", "tagger", etc */
520 end_of_header
= strchr(*beg
, ' ');
522 BUG("malformed line fed to anonymize_ident_line: %.*s",
523 (int)(*end
- *beg
), *beg
);
525 strbuf_add(out
, *beg
, end_of_header
- *beg
);
527 if (!split_ident_line(&split
, end_of_header
, *end
- end_of_header
) &&
532 len
= split
.mail_end
- split
.name_begin
;
533 ident
= anonymize_mem(&idents
, anonymize_ident
,
534 split
.name_begin
, &len
);
535 strbuf_add(out
, ident
, len
);
536 strbuf_addch(out
, ' ');
537 strbuf_add(out
, split
.date_begin
, split
.tz_end
- split
.date_begin
);
539 strbuf_addstr(out
, "Malformed Ident <malformed@example.com> 0 -0000");
543 *end
= out
->buf
+ out
->len
;
546 static void handle_commit(struct commit
*commit
, struct rev_info
*rev
,
547 struct string_list
*paths_of_changed_objects
)
549 int saved_output_format
= rev
->diffopt
.output_format
;
550 const char *commit_buffer
;
551 const char *author
, *author_end
, *committer
, *committer_end
;
552 const char *encoding
, *message
;
553 char *reencoded
= NULL
;
554 struct commit_list
*p
;
558 rev
->diffopt
.output_format
= DIFF_FORMAT_CALLBACK
;
560 parse_commit_or_die(commit
);
561 commit_buffer
= get_commit_buffer(commit
, NULL
);
562 author
= strstr(commit_buffer
, "\nauthor ");
564 die ("Could not find author in commit %s",
565 oid_to_hex(&commit
->object
.oid
));
567 author_end
= strchrnul(author
, '\n');
568 committer
= strstr(author_end
, "\ncommitter ");
570 die ("Could not find committer in commit %s",
571 oid_to_hex(&commit
->object
.oid
));
573 committer_end
= strchrnul(committer
, '\n');
574 message
= strstr(committer_end
, "\n\n");
575 encoding
= find_encoding(committer_end
, message
);
579 if (commit
->parents
&&
580 get_object_mark(&commit
->parents
->item
->object
) != 0 &&
582 parse_commit_or_die(commit
->parents
->item
);
583 diff_tree_oid(get_commit_tree_oid(commit
->parents
->item
),
584 get_commit_tree_oid(commit
), "", &rev
->diffopt
);
587 diff_root_tree_oid(get_commit_tree_oid(commit
),
590 /* Export the referenced blobs, and remember the marks. */
591 for (i
= 0; i
< diff_queued_diff
.nr
; i
++)
592 if (!S_ISGITLINK(diff_queued_diff
.queue
[i
]->two
->mode
))
593 export_blob(&diff_queued_diff
.queue
[i
]->two
->oid
);
595 refname
= *revision_sources_at(&revision_sources
, commit
);
597 refname
= anonymize_refname(refname
);
598 anonymize_ident_line(&committer
, &committer_end
);
599 anonymize_ident_line(&author
, &author_end
);
602 mark_next_object(&commit
->object
);
604 reencoded
= anonymize_commit_message(message
);
605 else if (!is_encoding_utf8(encoding
))
606 reencoded
= reencode_string(message
, "UTF-8", encoding
);
607 if (!commit
->parents
)
608 printf("reset %s\n", refname
);
609 printf("commit %s\nmark :%"PRIu32
"\n%.*s\n%.*s\ndata %u\n%s",
611 (int)(author_end
- author
), author
,
612 (int)(committer_end
- committer
), committer
,
614 ? strlen(reencoded
) : message
615 ? strlen(message
) : 0),
616 reencoded
? reencoded
: message
? message
: "");
618 unuse_commit_buffer(commit
, commit_buffer
);
620 for (i
= 0, p
= commit
->parents
; p
; p
= p
->next
) {
621 int mark
= get_object_mark(&p
->item
->object
);
625 printf("from :%d\n", mark
);
627 printf("merge :%d\n", mark
);
632 printf("deleteall\n");
633 log_tree_diff_flush(rev
);
634 string_list_clear(paths_of_changed_objects
, 0);
635 rev
->diffopt
.output_format
= saved_output_format
;
642 static void *anonymize_tag(const void *old
, size_t *len
)
645 struct strbuf out
= STRBUF_INIT
;
646 strbuf_addf(&out
, "tag message %d", counter
++);
647 return strbuf_detach(&out
, len
);
650 static void handle_tail(struct object_array
*commits
, struct rev_info
*revs
,
651 struct string_list
*paths_of_changed_objects
)
653 struct commit
*commit
;
654 while (commits
->nr
) {
655 commit
= (struct commit
*)object_array_pop(commits
);
656 if (has_unshown_parent(commit
)) {
657 /* Queue again, to be handled later */
658 add_object_array(&commit
->object
, NULL
, commits
);
661 handle_commit(commit
, revs
, paths_of_changed_objects
);
665 static void handle_tag(const char *name
, struct tag
*tag
)
668 enum object_type type
;
670 const char *tagger
, *tagger_end
, *message
;
671 size_t message_size
= 0;
672 struct object
*tagged
;
676 /* Trees have no identifier in fast-export output, thus we have no way
677 * to output tags of trees, tags of tags of trees, etc. Simply omit
680 tagged
= tag
->tagged
;
681 while (tagged
->type
== OBJ_TAG
) {
682 tagged
= ((struct tag
*)tagged
)->tagged
;
684 if (tagged
->type
== OBJ_TREE
) {
685 warning("Omitting tag %s,\nsince tags of trees (or tags of tags of trees, etc.) are not supported.",
686 oid_to_hex(&tag
->object
.oid
));
690 buf
= read_object_file(&tag
->object
.oid
, &type
, &size
);
692 die ("Could not read tag %s", oid_to_hex(&tag
->object
.oid
));
693 message
= memmem(buf
, size
, "\n\n", 2);
696 message_size
= strlen(message
);
698 tagger
= memmem(buf
, message
? message
- buf
: size
, "\ntagger ", 8);
700 if (fake_missing_tagger
)
701 tagger
= "tagger Unspecified Tagger "
702 "<unspecified-tagger> 0 +0000";
705 tagger_end
= tagger
+ strlen(tagger
);
708 tagger_end
= strchrnul(tagger
, '\n');
710 anonymize_ident_line(&tagger
, &tagger_end
);
714 name
= anonymize_refname(name
);
716 static struct hashmap tags
;
717 message
= anonymize_mem(&tags
, anonymize_tag
,
718 message
, &message_size
);
722 /* handle signed tags */
724 const char *signature
= strstr(message
,
725 "\n-----BEGIN PGP SIGNATURE-----\n");
727 switch(signed_tag_mode
) {
729 die ("Encountered signed tag %s; use "
730 "--signed-tags=<mode> to handle it.",
731 oid_to_hex(&tag
->object
.oid
));
733 warning ("Exporting signed tag %s",
734 oid_to_hex(&tag
->object
.oid
));
739 warning ("Stripping signature from tag %s",
740 oid_to_hex(&tag
->object
.oid
));
743 message_size
= signature
+ 1 - message
;
748 /* handle tag->tagged having been filtered out due to paths specified */
749 tagged
= tag
->tagged
;
750 tagged_mark
= get_object_mark(tagged
);
752 switch(tag_of_filtered_mode
) {
754 die ("Tag %s tags unexported object; use "
755 "--tag-of-filtered-object=<mode> to handle it.",
756 oid_to_hex(&tag
->object
.oid
));
758 /* Ignore this tag altogether */
762 if (tagged
->type
!= OBJ_COMMIT
) {
763 die ("Tag %s tags unexported %s!",
764 oid_to_hex(&tag
->object
.oid
),
765 type_name(tagged
->type
));
767 p
= (struct commit
*)tagged
;
769 if (p
->parents
&& p
->parents
->next
)
771 if (p
->object
.flags
& UNINTERESTING
)
773 if (!(p
->object
.flags
& TREESAME
))
776 die ("Can't find replacement commit for tag %s\n",
777 oid_to_hex(&tag
->object
.oid
));
778 p
= p
->parents
->item
;
780 tagged_mark
= get_object_mark(&p
->object
);
784 if (starts_with(name
, "refs/tags/"))
786 printf("tag %s\nfrom :%d\n%.*s%sdata %d\n%.*s\n",
788 (int)(tagger_end
- tagger
), tagger
,
789 tagger
== tagger_end
? "" : "\n",
790 (int)message_size
, (int)message_size
, message
? message
: "");
794 static struct commit
*get_commit(struct rev_cmdline_entry
*e
, char *full_name
)
796 switch (e
->item
->type
) {
798 return (struct commit
*)e
->item
;
800 struct tag
*tag
= (struct tag
*)e
->item
;
802 /* handle nested tags */
803 while (tag
&& tag
->object
.type
== OBJ_TAG
) {
804 parse_object(&tag
->object
.oid
);
805 string_list_append(&extra_refs
, full_name
)->util
= tag
;
806 tag
= (struct tag
*)tag
->tagged
;
809 die("Tag %s points nowhere?", e
->name
);
810 return (struct commit
*)tag
;
818 static void get_tags_and_duplicates(struct rev_cmdline_info
*info
)
822 for (i
= 0; i
< info
->nr
; i
++) {
823 struct rev_cmdline_entry
*e
= info
->rev
+ i
;
824 struct object_id oid
;
825 struct commit
*commit
;
828 if (e
->flags
& UNINTERESTING
)
831 if (dwim_ref(e
->name
, strlen(e
->name
), &oid
, &full_name
) != 1)
836 private = apply_refspecs(&refspecs
, full_name
);
843 commit
= get_commit(e
, full_name
);
845 warning("%s: Unexpected object of type %s, skipping.",
847 type_name(e
->item
->type
));
851 switch(commit
->object
.type
) {
855 export_blob(&commit
->object
.oid
);
857 default: /* OBJ_TAG (nested tags) is already handled */
858 warning("Tag points to object of unexpected type %s, skipping.",
859 type_name(commit
->object
.type
));
864 * This ref will not be updated through a commit, lets make
865 * sure it gets properly updated eventually.
867 if (*revision_sources_at(&revision_sources
, commit
) ||
868 commit
->object
.flags
& SHOWN
)
869 string_list_append(&extra_refs
, full_name
)->util
= commit
;
870 if (!*revision_sources_at(&revision_sources
, commit
))
871 *revision_sources_at(&revision_sources
, commit
) = full_name
;
875 static void handle_tags_and_duplicates(void)
877 struct commit
*commit
;
880 for (i
= extra_refs
.nr
- 1; i
>= 0; i
--) {
881 const char *name
= extra_refs
.items
[i
].string
;
882 struct object
*object
= extra_refs
.items
[i
].util
;
883 switch (object
->type
) {
885 handle_tag(name
, (struct tag
*)object
);
889 name
= anonymize_refname(name
);
890 /* create refs pointing to already seen commits */
891 commit
= (struct commit
*)object
;
892 printf("reset %s\nfrom :%d\n\n", name
,
893 get_object_mark(&commit
->object
));
900 static void export_marks(char *file
)
904 struct decoration_entry
*deco
= idnums
.entries
;
908 f
= fopen_for_writing(file
);
910 die_errno("Unable to open marks file %s for writing.", file
);
912 for (i
= 0; i
< idnums
.size
; i
++) {
913 if (deco
->base
&& deco
->base
->type
== 1) {
914 mark
= ptr_to_mark(deco
->decoration
);
915 if (fprintf(f
, ":%"PRIu32
" %s\n", mark
,
916 oid_to_hex(&deco
->base
->oid
)) < 0) {
927 error("Unable to write marks file %s.", file
);
930 static void import_marks(char *input_file
)
933 FILE *f
= xfopen(input_file
, "r");
935 while (fgets(line
, sizeof(line
), f
)) {
937 char *line_end
, *mark_end
;
938 struct object_id oid
;
939 struct object
*object
;
940 struct commit
*commit
;
941 enum object_type type
;
943 line_end
= strchr(line
, '\n');
944 if (line
[0] != ':' || !line_end
)
945 die("corrupt mark line: %s", line
);
948 mark
= strtoumax(line
+ 1, &mark_end
, 10);
949 if (!mark
|| mark_end
== line
+ 1
950 || *mark_end
!= ' ' || get_oid_hex(mark_end
+ 1, &oid
))
951 die("corrupt mark line: %s", line
);
953 if (last_idnum
< mark
)
956 type
= oid_object_info(the_repository
, &oid
, NULL
);
958 die("object not found: %s", oid_to_hex(&oid
));
960 if (type
!= OBJ_COMMIT
)
964 commit
= lookup_commit(&oid
);
966 die("not a commit? can't happen: %s", oid_to_hex(&oid
));
968 object
= &commit
->object
;
970 if (object
->flags
& SHOWN
)
971 error("Object %s already has a mark", oid_to_hex(&oid
));
973 mark_object(object
, mark
);
975 object
->flags
|= SHOWN
;
980 static void handle_deletes(void)
983 for (i
= 0; i
< refspecs
.nr
; i
++) {
984 struct refspec_item
*refspec
= &refspecs
.items
[i
];
988 printf("reset %s\nfrom %s\n\n",
989 refspec
->dst
, sha1_to_hex(null_sha1
));
993 int cmd_fast_export(int argc
, const char **argv
, const char *prefix
)
995 struct rev_info revs
;
996 struct object_array commits
= OBJECT_ARRAY_INIT
;
997 struct commit
*commit
;
998 char *export_filename
= NULL
, *import_filename
= NULL
;
999 uint32_t lastimportid
;
1000 struct string_list refspecs_list
= STRING_LIST_INIT_NODUP
;
1001 struct string_list paths_of_changed_objects
= STRING_LIST_INIT_DUP
;
1002 struct option options
[] = {
1003 OPT_INTEGER(0, "progress", &progress
,
1004 N_("show progress after <n> objects")),
1005 OPT_CALLBACK(0, "signed-tags", &signed_tag_mode
, N_("mode"),
1006 N_("select handling of signed tags"),
1007 parse_opt_signed_tag_mode
),
1008 OPT_CALLBACK(0, "tag-of-filtered-object", &tag_of_filtered_mode
, N_("mode"),
1009 N_("select handling of tags that tag filtered objects"),
1010 parse_opt_tag_of_filtered_mode
),
1011 OPT_STRING(0, "export-marks", &export_filename
, N_("file"),
1012 N_("Dump marks to this file")),
1013 OPT_STRING(0, "import-marks", &import_filename
, N_("file"),
1014 N_("Import marks from this file")),
1015 OPT_BOOL(0, "fake-missing-tagger", &fake_missing_tagger
,
1016 N_("Fake a tagger when tags lack one")),
1017 OPT_BOOL(0, "full-tree", &full_tree
,
1018 N_("Output full tree for each commit")),
1019 OPT_BOOL(0, "use-done-feature", &use_done_feature
,
1020 N_("Use the done feature to terminate the stream")),
1021 OPT_BOOL(0, "no-data", &no_data
, N_("Skip output of blob data")),
1022 OPT_STRING_LIST(0, "refspec", &refspecs_list
, N_("refspec"),
1023 N_("Apply refspec to exported refs")),
1024 OPT_BOOL(0, "anonymize", &anonymize
, N_("anonymize output")),
1029 usage_with_options (fast_export_usage
, options
);
1031 /* we handle encodings */
1032 git_config(git_default_config
, NULL
);
1034 init_revisions(&revs
, prefix
);
1035 init_revision_sources(&revision_sources
);
1036 revs
.topo_order
= 1;
1037 revs
.sources
= &revision_sources
;
1038 revs
.rewrite_parents
= 1;
1039 argc
= parse_options(argc
, argv
, prefix
, options
, fast_export_usage
,
1040 PARSE_OPT_KEEP_ARGV0
| PARSE_OPT_KEEP_UNKNOWN
);
1041 argc
= setup_revisions(argc
, argv
, &revs
, NULL
);
1043 usage_with_options (fast_export_usage
, options
);
1045 if (refspecs_list
.nr
) {
1048 for (i
= 0; i
< refspecs_list
.nr
; i
++)
1049 refspec_append(&refspecs
, refspecs_list
.items
[i
].string
);
1051 string_list_clear(&refspecs_list
, 1);
1054 if (use_done_feature
)
1055 printf("feature done\n");
1057 if (import_filename
)
1058 import_marks(import_filename
);
1059 lastimportid
= last_idnum
;
1061 if (import_filename
&& revs
.prune_data
.nr
)
1064 get_tags_and_duplicates(&revs
.cmdline
);
1066 if (prepare_revision_walk(&revs
))
1067 die("revision walk setup failed");
1068 revs
.diffopt
.format_callback
= show_filemodify
;
1069 revs
.diffopt
.format_callback_data
= &paths_of_changed_objects
;
1070 revs
.diffopt
.flags
.recursive
= 1;
1071 while ((commit
= get_revision(&revs
))) {
1072 if (has_unshown_parent(commit
)) {
1073 add_object_array(&commit
->object
, NULL
, &commits
);
1076 handle_commit(commit
, &revs
, &paths_of_changed_objects
);
1077 handle_tail(&commits
, &revs
, &paths_of_changed_objects
);
1081 handle_tags_and_duplicates();
1084 if (export_filename
&& lastimportid
!= last_idnum
)
1085 export_marks(export_filename
);
1087 if (use_done_feature
)
1090 refspec_clear(&refspecs
);