]>
git.ipfire.org Git - thirdparty/git.git/blob - bundle.c
7 #include "list-objects.h"
8 #include "run-command.h"
10 #include "argv-array.h"
12 static const char bundle_signature
[] = "# v2 git bundle\n";
14 static void add_to_ref_list(const unsigned char *sha1
, const char *name
,
15 struct ref_list
*list
)
17 if (list
->nr
+ 1 >= list
->alloc
) {
18 list
->alloc
= alloc_nr(list
->nr
+ 1);
19 list
->list
= xrealloc(list
->list
,
20 list
->alloc
* sizeof(list
->list
[0]));
22 memcpy(list
->list
[list
->nr
].sha1
, sha1
, 20);
23 list
->list
[list
->nr
].name
= xstrdup(name
);
27 static int parse_bundle_header(int fd
, struct bundle_header
*header
,
28 const char *report_path
)
30 struct strbuf buf
= STRBUF_INIT
;
33 /* The bundle header begins with the signature */
34 if (strbuf_getwholeline_fd(&buf
, fd
, '\n') ||
35 strcmp(buf
.buf
, bundle_signature
)) {
37 error(_("'%s' does not look like a v2 bundle file"),
43 /* The bundle header ends with an empty line */
44 while (!strbuf_getwholeline_fd(&buf
, fd
, '\n') &&
45 buf
.len
&& buf
.buf
[0] != '\n') {
46 unsigned char sha1
[20];
49 if (*buf
.buf
== '-') {
51 strbuf_remove(&buf
, 0, 1);
56 * Tip lines have object name, SP, and refname.
57 * Prerequisites have object name that is optionally
58 * followed by SP and subject line.
60 if (get_sha1_hex(buf
.buf
, sha1
) ||
61 (buf
.len
> 40 && !isspace(buf
.buf
[40])) ||
62 (!is_prereq
&& buf
.len
<= 40)) {
64 error(_("unrecognized header: %s%s (%d)"),
65 (is_prereq
? "-" : ""), buf
.buf
, (int)buf
.len
);
70 add_to_ref_list(sha1
, "", &header
->prerequisites
);
72 add_to_ref_list(sha1
, buf
.buf
+ 41, &header
->references
);
85 int read_bundle_header(const char *path
, struct bundle_header
*header
)
87 int fd
= open(path
, O_RDONLY
);
90 return error(_("could not open '%s'"), path
);
91 return parse_bundle_header(fd
, header
, path
);
94 int is_bundle(const char *path
, int quiet
)
96 struct bundle_header header
;
97 int fd
= open(path
, O_RDONLY
);
101 memset(&header
, 0, sizeof(header
));
102 fd
= parse_bundle_header(fd
, &header
, quiet
? NULL
: path
);
108 static int list_refs(struct ref_list
*r
, int argc
, const char **argv
)
112 for (i
= 0; i
< r
->nr
; i
++) {
115 for (j
= 1; j
< argc
; j
++)
116 if (!strcmp(r
->list
[i
].name
, argv
[j
]))
121 printf("%s %s\n", sha1_to_hex(r
->list
[i
].sha1
),
127 /* Remember to update object flag allocation in object.h */
128 #define PREREQ_MARK (1u<<16)
130 int verify_bundle(struct bundle_header
*header
, int verbose
)
133 * Do fast check, then if any prereqs are missing then go line by line
134 * to be verbose about the errors
136 struct ref_list
*p
= &header
->prerequisites
;
137 struct rev_info revs
;
138 const char *argv
[] = {NULL
, "--all", NULL
};
139 struct object_array refs
;
140 struct commit
*commit
;
141 int i
, ret
= 0, req_nr
;
142 const char *message
= _("Repository lacks these prerequisite commits:");
144 init_revisions(&revs
, NULL
);
145 for (i
= 0; i
< p
->nr
; i
++) {
146 struct ref_list_entry
*e
= p
->list
+ i
;
147 struct object
*o
= parse_object(e
->sha1
);
149 o
->flags
|= PREREQ_MARK
;
150 add_pending_object(&revs
, o
, e
->name
);
154 error("%s", message
);
155 error("%s %s", sha1_to_hex(e
->sha1
), e
->name
);
157 if (revs
.pending
.nr
!= p
->nr
)
159 req_nr
= revs
.pending
.nr
;
160 setup_revisions(2, argv
, &revs
, NULL
);
163 revs
.leak_pending
= 1;
165 if (prepare_revision_walk(&revs
))
166 die(_("revision walk setup failed"));
169 while (i
&& (commit
= get_revision(&revs
)))
170 if (commit
->object
.flags
& PREREQ_MARK
)
173 for (i
= 0; i
< req_nr
; i
++)
174 if (!(refs
.objects
[i
].item
->flags
& SHOWN
)) {
176 error("%s", message
);
177 error("%s %s", sha1_to_hex(refs
.objects
[i
].item
->sha1
),
178 refs
.objects
[i
].name
);
181 clear_commit_marks_for_object_array(&refs
, ALL_REV_FLAGS
);
187 r
= &header
->references
;
188 printf_ln(Q_("The bundle contains this ref:",
189 "The bundle contains these %d refs:",
192 list_refs(r
, 0, NULL
);
193 r
= &header
->prerequisites
;
195 printf_ln(_("The bundle records a complete history."));
197 printf_ln(Q_("The bundle requires this ref:",
198 "The bundle requires these %d refs:",
201 list_refs(r
, 0, NULL
);
207 int list_bundle_refs(struct bundle_header
*header
, int argc
, const char **argv
)
209 return list_refs(&header
->references
, argc
, argv
);
212 static int is_tag_in_date_range(struct object
*tag
, struct rev_info
*revs
)
215 enum object_type type
;
216 char *buf
, *line
, *lineend
;
219 if (revs
->max_age
== -1 && revs
->min_age
== -1)
222 buf
= read_sha1_file(tag
->sha1
, &type
, &size
);
225 line
= memmem(buf
, size
, "\ntagger ", 8);
228 lineend
= memchr(line
, buf
+ size
- line
, '\n');
229 line
= memchr(line
, lineend
? lineend
- line
: buf
+ size
- line
, '>');
232 date
= strtoul(line
, NULL
, 10);
234 return (revs
->max_age
== -1 || revs
->max_age
< date
) &&
235 (revs
->min_age
== -1 || revs
->min_age
> date
);
238 int create_bundle(struct bundle_header
*header
, const char *path
,
239 int argc
, const char **argv
)
241 static struct lock_file lock
;
243 int bundle_to_stdout
;
244 struct argv_array argv_boundary
= ARGV_ARRAY_INIT
;
245 struct argv_array argv_pack
= ARGV_ARRAY_INIT
;
246 int i
, ref_count
= 0;
247 struct strbuf buf
= STRBUF_INIT
;
248 struct rev_info revs
;
249 struct child_process rls
;
252 bundle_to_stdout
= !strcmp(path
, "-");
253 if (bundle_to_stdout
)
256 bundle_fd
= hold_lock_file_for_update(&lock
, path
,
259 /* write signature */
260 write_or_die(bundle_fd
, bundle_signature
, strlen(bundle_signature
));
262 /* init revs to list objects for pack-objects later */
263 save_commit_buffer
= 0;
264 init_revisions(&revs
, NULL
);
266 /* write prerequisites */
267 argv_array_pushl(&argv_boundary
,
268 "rev-list", "--boundary", "--pretty=oneline",
270 for (i
= 1; i
< argc
; i
++)
271 argv_array_push(&argv_boundary
, argv
[i
]);
273 memset(&rls
, 0, sizeof(rls
));
274 rls
.argv
= argv_boundary
.argv
;
277 if (start_command(&rls
))
279 rls_fout
= xfdopen(rls
.out
, "r");
280 while (strbuf_getwholeline(&buf
, rls_fout
, '\n') != EOF
) {
281 unsigned char sha1
[20];
282 if (buf
.len
> 0 && buf
.buf
[0] == '-') {
283 write_or_die(bundle_fd
, buf
.buf
, buf
.len
);
284 if (!get_sha1_hex(buf
.buf
+ 1, sha1
)) {
285 struct object
*object
= parse_object_or_die(sha1
, buf
.buf
);
286 object
->flags
|= UNINTERESTING
;
287 add_pending_object(&revs
, object
, buf
.buf
);
289 } else if (!get_sha1_hex(buf
.buf
, sha1
)) {
290 struct object
*object
= parse_object_or_die(sha1
, buf
.buf
);
291 object
->flags
|= SHOWN
;
294 strbuf_release(&buf
);
296 if (finish_command(&rls
))
297 return error(_("rev-list died"));
299 /* write references */
300 argc
= setup_revisions(argc
, argv
, &revs
, NULL
);
303 return error(_("unrecognized argument: %s"), argv
[1]);
305 object_array_remove_duplicates(&revs
.pending
);
307 for (i
= 0; i
< revs
.pending
.nr
; i
++) {
308 struct object_array_entry
*e
= revs
.pending
.objects
+ i
;
309 unsigned char sha1
[20];
311 const char *display_ref
;
314 if (e
->item
->flags
& UNINTERESTING
)
316 if (dwim_ref(e
->name
, strlen(e
->name
), sha1
, &ref
) != 1)
318 if (read_ref_full(e
->name
, sha1
, 1, &flag
))
320 display_ref
= (flag
& REF_ISSYMREF
) ? e
->name
: ref
;
322 if (e
->item
->type
== OBJ_TAG
&&
323 !is_tag_in_date_range(e
->item
, &revs
)) {
324 e
->item
->flags
|= UNINTERESTING
;
329 * Make sure the refs we wrote out is correct; --max-count and
330 * other limiting options could have prevented all the tips
331 * from getting output.
333 * Non commit objects such as tags and blobs do not have
334 * this issue as they are not affected by those extra
337 if (!(e
->item
->flags
& SHOWN
) && e
->item
->type
== OBJ_COMMIT
) {
338 warning(_("ref '%s' is excluded by the rev-list options"),
344 * If you run "git bundle create bndl v1.0..v2.0", the
345 * name of the positive ref is "v2.0" but that is the
346 * commit that is referenced by the tag, and not the tag
349 if (hashcmp(sha1
, e
->item
->sha1
)) {
351 * Is this the positive end of a range expressed
352 * in terms of a tag (e.g. v2.0 from the range
355 struct commit
*one
= lookup_commit_reference(sha1
);
358 if (e
->item
== &(one
->object
)) {
360 * Need to include e->name as an
361 * independent ref to the pack-objects
362 * input, so that the tag is included
363 * in the output; otherwise we would
364 * end up triggering "empty bundle"
367 obj
= parse_object_or_die(sha1
, e
->name
);
369 add_pending_object(&revs
, obj
, e
->name
);
376 write_or_die(bundle_fd
, sha1_to_hex(e
->item
->sha1
), 40);
377 write_or_die(bundle_fd
, " ", 1);
378 write_or_die(bundle_fd
, display_ref
, strlen(display_ref
));
379 write_or_die(bundle_fd
, "\n", 1);
383 die(_("Refusing to create empty bundle."));
386 write_or_die(bundle_fd
, "\n", 1);
389 argv_array_pushl(&argv_pack
,
390 "pack-objects", "--all-progress-implied",
391 "--stdout", "--thin", "--delta-base-offset",
393 memset(&rls
, 0, sizeof(rls
));
394 rls
.argv
= argv_pack
.argv
;
398 if (start_command(&rls
))
399 return error(_("Could not spawn pack-objects"));
402 * start_command closed bundle_fd if it was > 1
403 * so set the lock fd to -1 so commit_lock_file()
404 * won't fail trying to close it.
408 for (i
= 0; i
< revs
.pending
.nr
; i
++) {
409 struct object
*object
= revs
.pending
.objects
[i
].item
;
410 if (object
->flags
& UNINTERESTING
)
411 write_or_die(rls
.in
, "^", 1);
412 write_or_die(rls
.in
, sha1_to_hex(object
->sha1
), 40);
413 write_or_die(rls
.in
, "\n", 1);
416 if (finish_command(&rls
))
417 return error(_("pack-objects died"));
418 if (!bundle_to_stdout
) {
419 if (commit_lock_file(&lock
))
420 die_errno(_("cannot create '%s'"), path
);
425 int unbundle(struct bundle_header
*header
, int bundle_fd
, int flags
)
427 const char *argv_index_pack
[] = {"index-pack",
428 "--fix-thin", "--stdin", NULL
, NULL
};
429 struct child_process ip
;
431 if (flags
& BUNDLE_VERBOSE
)
432 argv_index_pack
[3] = "-v";
434 if (verify_bundle(header
, 0))
436 memset(&ip
, 0, sizeof(ip
));
437 ip
.argv
= argv_index_pack
;
441 if (run_command(&ip
))
442 return error(_("index-pack died"));