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Commit | Line | Data |
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30415d50 | 1 | #include "cache.h" |
697cc8ef | 2 | #include "lockfile.h" |
30415d50 JS |
3 | #include "bundle.h" |
4 | #include "object.h" | |
5 | #include "commit.h" | |
6 | #include "diff.h" | |
7 | #include "revision.h" | |
8 | #include "list-objects.h" | |
9 | #include "run-command.h" | |
fa303836 | 10 | #include "refs.h" |
1e2371ea | 11 | #include "argv-array.h" |
30415d50 JS |
12 | |
13 | static const char bundle_signature[] = "# v2 git bundle\n"; | |
14 | ||
b8607f35 | 15 | static void add_to_ref_list(const struct object_id *oid, const char *name, |
30415d50 JS |
16 | struct ref_list *list) |
17 | { | |
5cbbe13a | 18 | ALLOC_GROW(list->list, list->nr + 1, list->alloc); |
b8607f35 | 19 | oidcpy(&list->list[list->nr].oid, oid); |
30415d50 JS |
20 | list->list[list->nr].name = xstrdup(name); |
21 | list->nr++; | |
22 | } | |
23 | ||
2727b71f JH |
24 | static int parse_bundle_header(int fd, struct bundle_header *header, |
25 | const char *report_path) | |
f3fa1838 | 26 | { |
e9ee84cf | 27 | struct strbuf buf = STRBUF_INIT; |
e9ee84cf | 28 | int status = 0; |
30415d50 | 29 | |
e9ee84cf | 30 | /* The bundle header begins with the signature */ |
5e8617f5 | 31 | if (strbuf_getwholeline_fd(&buf, fd, '\n') || |
e9ee84cf | 32 | strcmp(buf.buf, bundle_signature)) { |
2727b71f | 33 | if (report_path) |
8a1e7eac | 34 | error(_("'%s' does not look like a v2 bundle file"), |
2727b71f | 35 | report_path); |
e9ee84cf JH |
36 | status = -1; |
37 | goto abort; | |
30415d50 | 38 | } |
e9ee84cf JH |
39 | |
40 | /* The bundle header ends with an empty line */ | |
5e8617f5 | 41 | while (!strbuf_getwholeline_fd(&buf, fd, '\n') && |
e9ee84cf | 42 | buf.len && buf.buf[0] != '\n') { |
b8607f35 | 43 | struct object_id oid; |
e9ee84cf | 44 | int is_prereq = 0; |
b8607f35 | 45 | const char *p; |
e9ee84cf JH |
46 | |
47 | if (*buf.buf == '-') { | |
48 | is_prereq = 1; | |
49 | strbuf_remove(&buf, 0, 1); | |
30415d50 | 50 | } |
e9ee84cf | 51 | strbuf_rtrim(&buf); |
30415d50 | 52 | |
e9ee84cf JH |
53 | /* |
54 | * Tip lines have object name, SP, and refname. | |
55 | * Prerequisites have object name that is optionally | |
56 | * followed by SP and subject line. | |
57 | */ | |
b8607f35 | 58 | if (parse_oid_hex(buf.buf, &oid, &p) || |
59 | (*p && !isspace(*p)) || | |
60 | (!is_prereq && !*p)) { | |
2727b71f | 61 | if (report_path) |
8a1e7eac | 62 | error(_("unrecognized header: %s%s (%d)"), |
2727b71f | 63 | (is_prereq ? "-" : ""), buf.buf, (int)buf.len); |
e9ee84cf JH |
64 | status = -1; |
65 | break; | |
66 | } else { | |
67 | if (is_prereq) | |
b8607f35 | 68 | add_to_ref_list(&oid, "", &header->prerequisites); |
e9ee84cf | 69 | else |
b8607f35 | 70 | add_to_ref_list(&oid, p + 1, &header->references); |
30415d50 | 71 | } |
30415d50 | 72 | } |
e9ee84cf JH |
73 | |
74 | abort: | |
75 | if (status) { | |
76 | close(fd); | |
77 | fd = -1; | |
30415d50 | 78 | } |
e9ee84cf | 79 | strbuf_release(&buf); |
30415d50 JS |
80 | return fd; |
81 | } | |
82 | ||
2727b71f JH |
83 | int read_bundle_header(const char *path, struct bundle_header *header) |
84 | { | |
85 | int fd = open(path, O_RDONLY); | |
86 | ||
30415d50 | 87 | if (fd < 0) |
8a1e7eac | 88 | return error(_("could not open '%s'"), path); |
2727b71f JH |
89 | return parse_bundle_header(fd, header, path); |
90 | } | |
91 | ||
92 | int is_bundle(const char *path, int quiet) | |
93 | { | |
94 | struct bundle_header header; | |
95 | int fd = open(path, O_RDONLY); | |
96 | ||
97 | if (fd < 0) | |
98 | return 0; | |
99 | memset(&header, 0, sizeof(header)); | |
100 | fd = parse_bundle_header(fd, &header, quiet ? NULL : path); | |
101 | if (fd >= 0) | |
102 | close(fd); | |
103 | return (fd >= 0); | |
30415d50 JS |
104 | } |
105 | ||
106 | static int list_refs(struct ref_list *r, int argc, const char **argv) | |
107 | { | |
108 | int i; | |
109 | ||
110 | for (i = 0; i < r->nr; i++) { | |
111 | if (argc > 1) { | |
112 | int j; | |
113 | for (j = 1; j < argc; j++) | |
114 | if (!strcmp(r->list[i].name, argv[j])) | |
115 | break; | |
116 | if (j == argc) | |
117 | continue; | |
118 | } | |
b8607f35 | 119 | printf("%s %s\n", oid_to_hex(&r->list[i].oid), |
30415d50 JS |
120 | r->list[i].name); |
121 | } | |
122 | return 0; | |
123 | } | |
124 | ||
208acbfb | 125 | /* Remember to update object flag allocation in object.h */ |
30415d50 JS |
126 | #define PREREQ_MARK (1u<<16) |
127 | ||
128 | int verify_bundle(struct bundle_header *header, int verbose) | |
129 | { | |
130 | /* | |
131 | * Do fast check, then if any prereqs are missing then go line by line | |
132 | * to be verbose about the errors | |
133 | */ | |
134 | struct ref_list *p = &header->prerequisites; | |
135 | struct rev_info revs; | |
a80aad7b | 136 | const char *argv[] = {NULL, "--all", NULL}; |
30415d50 JS |
137 | struct object_array refs; |
138 | struct commit *commit; | |
139 | int i, ret = 0, req_nr; | |
8a1e7eac | 140 | const char *message = _("Repository lacks these prerequisite commits:"); |
30415d50 JS |
141 | |
142 | init_revisions(&revs, NULL); | |
143 | for (i = 0; i < p->nr; i++) { | |
144 | struct ref_list_entry *e = p->list + i; | |
b8607f35 | 145 | struct object *o = parse_object(e->oid.hash); |
30415d50 JS |
146 | if (o) { |
147 | o->flags |= PREREQ_MARK; | |
148 | add_pending_object(&revs, o, e->name); | |
149 | continue; | |
150 | } | |
151 | if (++ret == 1) | |
9db56f71 | 152 | error("%s", message); |
b8607f35 | 153 | error("%s %s", oid_to_hex(&e->oid), e->name); |
30415d50 JS |
154 | } |
155 | if (revs.pending.nr != p->nr) | |
156 | return ret; | |
157 | req_nr = revs.pending.nr; | |
158 | setup_revisions(2, argv, &revs, NULL); | |
159 | ||
5be78599 RS |
160 | refs = revs.pending; |
161 | revs.leak_pending = 1; | |
30415d50 | 162 | |
3d51e1b5 | 163 | if (prepare_revision_walk(&revs)) |
8a1e7eac | 164 | die(_("revision walk setup failed")); |
30415d50 JS |
165 | |
166 | i = req_nr; | |
167 | while (i && (commit = get_revision(&revs))) | |
168 | if (commit->object.flags & PREREQ_MARK) | |
169 | i--; | |
170 | ||
171 | for (i = 0; i < req_nr; i++) | |
172 | if (!(refs.objects[i].item->flags & SHOWN)) { | |
173 | if (++ret == 1) | |
9db56f71 | 174 | error("%s", message); |
f2fd0760 | 175 | error("%s %s", oid_to_hex(&refs.objects[i].item->oid), |
30415d50 JS |
176 | refs.objects[i].name); |
177 | } | |
178 | ||
86a0a408 | 179 | clear_commit_marks_for_object_array(&refs, ALL_REV_FLAGS); |
5be78599 | 180 | free(refs.objects); |
30415d50 JS |
181 | |
182 | if (verbose) { | |
183 | struct ref_list *r; | |
184 | ||
185 | r = &header->references; | |
a02ffe0e LF |
186 | printf_ln(Q_("The bundle contains this ref:", |
187 | "The bundle contains these %d refs:", | |
8a1e7eac NTND |
188 | r->nr), |
189 | r->nr); | |
30415d50 | 190 | list_refs(r, 0, NULL); |
71ba6b10 | 191 | r = &header->prerequisites; |
8c3710fd JH |
192 | if (!r->nr) { |
193 | printf_ln(_("The bundle records a complete history.")); | |
194 | } else { | |
a02ffe0e LF |
195 | printf_ln(Q_("The bundle requires this ref:", |
196 | "The bundle requires these %d refs:", | |
8c3710fd JH |
197 | r->nr), |
198 | r->nr); | |
199 | list_refs(r, 0, NULL); | |
200 | } | |
30415d50 JS |
201 | } |
202 | return ret; | |
203 | } | |
204 | ||
205 | int list_bundle_refs(struct bundle_header *header, int argc, const char **argv) | |
206 | { | |
207 | return list_refs(&header->references, argc, argv); | |
208 | } | |
209 | ||
c9a42c4a JS |
210 | static int is_tag_in_date_range(struct object *tag, struct rev_info *revs) |
211 | { | |
212 | unsigned long size; | |
213 | enum object_type type; | |
64045940 | 214 | char *buf = NULL, *line, *lineend; |
c9a42c4a | 215 | unsigned long date; |
64045940 | 216 | int result = 1; |
c9a42c4a JS |
217 | |
218 | if (revs->max_age == -1 && revs->min_age == -1) | |
64045940 | 219 | goto out; |
c9a42c4a | 220 | |
ed1c9977 | 221 | buf = read_sha1_file(tag->oid.hash, &type, &size); |
c9a42c4a | 222 | if (!buf) |
64045940 | 223 | goto out; |
c9a42c4a JS |
224 | line = memmem(buf, size, "\ntagger ", 8); |
225 | if (!line++) | |
64045940 | 226 | goto out; |
2c8544ab LF |
227 | lineend = memchr(line, '\n', buf + size - line); |
228 | line = memchr(line, '>', lineend ? lineend - line : buf + size - line); | |
c9a42c4a | 229 | if (!line++) |
64045940 | 230 | goto out; |
c9a42c4a | 231 | date = strtoul(line, NULL, 10); |
64045940 | 232 | result = (revs->max_age == -1 || revs->max_age < date) && |
c9a42c4a | 233 | (revs->min_age == -1 || revs->min_age > date); |
64045940 RS |
234 | out: |
235 | free(buf); | |
236 | return result; | |
c9a42c4a JS |
237 | } |
238 | ||
e54c347c MH |
239 | |
240 | /* Write the pack data to bundle_fd, then close it if it is > 1. */ | |
241 | static int write_pack_data(int bundle_fd, struct rev_info *revs) | |
5e626b91 JH |
242 | { |
243 | struct child_process pack_objects = CHILD_PROCESS_INIT; | |
244 | int i; | |
245 | ||
246 | argv_array_pushl(&pack_objects.args, | |
247 | "pack-objects", "--all-progress-implied", | |
248 | "--stdout", "--thin", "--delta-base-offset", | |
249 | NULL); | |
250 | pack_objects.in = -1; | |
251 | pack_objects.out = bundle_fd; | |
252 | pack_objects.git_cmd = 1; | |
253 | if (start_command(&pack_objects)) | |
254 | return error(_("Could not spawn pack-objects")); | |
255 | ||
5e626b91 JH |
256 | for (i = 0; i < revs->pending.nr; i++) { |
257 | struct object *object = revs->pending.objects[i].item; | |
258 | if (object->flags & UNINTERESTING) | |
259 | write_or_die(pack_objects.in, "^", 1); | |
f2fd0760 | 260 | write_or_die(pack_objects.in, oid_to_hex(&object->oid), GIT_SHA1_HEXSZ); |
5e626b91 JH |
261 | write_or_die(pack_objects.in, "\n", 1); |
262 | } | |
263 | close(pack_objects.in); | |
264 | if (finish_command(&pack_objects)) | |
265 | return error(_("pack-objects died")); | |
266 | return 0; | |
267 | } | |
268 | ||
e8eb2512 JH |
269 | static int compute_and_write_prerequisites(int bundle_fd, |
270 | struct rev_info *revs, | |
271 | int argc, const char **argv) | |
30415d50 | 272 | { |
d3180279 | 273 | struct child_process rls = CHILD_PROCESS_INIT; |
e8eb2512 | 274 | struct strbuf buf = STRBUF_INIT; |
30415d50 | 275 | FILE *rls_fout; |
e8eb2512 | 276 | int i; |
30415d50 | 277 | |
92859f3a | 278 | argv_array_pushl(&rls.args, |
1e2371ea JH |
279 | "rev-list", "--boundary", "--pretty=oneline", |
280 | NULL); | |
281 | for (i = 1; i < argc; i++) | |
92859f3a | 282 | argv_array_push(&rls.args, argv[i]); |
30415d50 JS |
283 | rls.out = -1; |
284 | rls.git_cmd = 1; | |
285 | if (start_command(&rls)) | |
286 | return -1; | |
41698375 | 287 | rls_fout = xfdopen(rls.out, "r"); |
bc2fed49 | 288 | while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) { |
b8607f35 | 289 | struct object_id oid; |
bc2fed49 TR |
290 | if (buf.len > 0 && buf.buf[0] == '-') { |
291 | write_or_die(bundle_fd, buf.buf, buf.len); | |
b8607f35 | 292 | if (!get_oid_hex(buf.buf + 1, &oid)) { |
293 | struct object *object = parse_object_or_die(oid.hash, buf.buf); | |
30415d50 | 294 | object->flags |= UNINTERESTING; |
e8eb2512 | 295 | add_pending_object(revs, object, buf.buf); |
30415d50 | 296 | } |
b8607f35 | 297 | } else if (!get_oid_hex(buf.buf, &oid)) { |
298 | struct object *object = parse_object_or_die(oid.hash, buf.buf); | |
30415d50 JS |
299 | object->flags |= SHOWN; |
300 | } | |
301 | } | |
bc2fed49 | 302 | strbuf_release(&buf); |
30415d50 JS |
303 | fclose(rls_fout); |
304 | if (finish_command(&rls)) | |
8a1e7eac | 305 | return error(_("rev-list died")); |
e8eb2512 JH |
306 | return 0; |
307 | } | |
308 | ||
d9362ef9 JK |
309 | /* |
310 | * Write out bundle refs based on the tips already | |
311 | * parsed into revs.pending. As a side effect, may | |
312 | * manipulate revs.pending to include additional | |
313 | * necessary objects (like tags). | |
314 | * | |
315 | * Returns the number of refs written, or negative | |
316 | * on error. | |
317 | */ | |
318 | static int write_bundle_refs(int bundle_fd, struct rev_info *revs) | |
e8eb2512 | 319 | { |
d9362ef9 JK |
320 | int i; |
321 | int ref_count = 0; | |
b2a6d1c6 | 322 | |
d9362ef9 JK |
323 | for (i = 0; i < revs->pending.nr; i++) { |
324 | struct object_array_entry *e = revs->pending.objects + i; | |
f2fd0760 | 325 | struct object_id oid; |
30415d50 | 326 | char *ref; |
fa303836 JH |
327 | const char *display_ref; |
328 | int flag; | |
30415d50 JS |
329 | |
330 | if (e->item->flags & UNINTERESTING) | |
331 | continue; | |
f2fd0760 | 332 | if (dwim_ref(e->name, strlen(e->name), oid.hash, &ref) != 1) |
c8a571d8 | 333 | goto skip_write_ref; |
f2fd0760 | 334 | if (read_ref_full(e->name, RESOLVE_REF_READING, oid.hash, &flag)) |
fa303836 JH |
335 | flag = 0; |
336 | display_ref = (flag & REF_ISSYMREF) ? e->name : ref; | |
337 | ||
c9a42c4a | 338 | if (e->item->type == OBJ_TAG && |
d9362ef9 | 339 | !is_tag_in_date_range(e->item, revs)) { |
c9a42c4a | 340 | e->item->flags |= UNINTERESTING; |
c8a571d8 | 341 | goto skip_write_ref; |
c9a42c4a JS |
342 | } |
343 | ||
30415d50 JS |
344 | /* |
345 | * Make sure the refs we wrote out is correct; --max-count and | |
346 | * other limiting options could have prevented all the tips | |
347 | * from getting output. | |
348 | * | |
349 | * Non commit objects such as tags and blobs do not have | |
350 | * this issue as they are not affected by those extra | |
351 | * constraints. | |
352 | */ | |
353 | if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) { | |
8a1e7eac | 354 | warning(_("ref '%s' is excluded by the rev-list options"), |
30415d50 | 355 | e->name); |
c8a571d8 | 356 | goto skip_write_ref; |
30415d50 JS |
357 | } |
358 | /* | |
359 | * If you run "git bundle create bndl v1.0..v2.0", the | |
360 | * name of the positive ref is "v2.0" but that is the | |
361 | * commit that is referenced by the tag, and not the tag | |
362 | * itself. | |
363 | */ | |
f2fd0760 | 364 | if (oidcmp(&oid, &e->item->oid)) { |
30415d50 JS |
365 | /* |
366 | * Is this the positive end of a range expressed | |
367 | * in terms of a tag (e.g. v2.0 from the range | |
368 | * "v1.0..v2.0")? | |
369 | */ | |
bc83266a | 370 | struct commit *one = lookup_commit_reference(&oid); |
30415d50 JS |
371 | struct object *obj; |
372 | ||
373 | if (e->item == &(one->object)) { | |
374 | /* | |
375 | * Need to include e->name as an | |
376 | * independent ref to the pack-objects | |
377 | * input, so that the tag is included | |
378 | * in the output; otherwise we would | |
379 | * end up triggering "empty bundle" | |
380 | * error. | |
381 | */ | |
f2fd0760 | 382 | obj = parse_object_or_die(oid.hash, e->name); |
30415d50 | 383 | obj->flags |= SHOWN; |
d9362ef9 | 384 | add_pending_object(revs, obj, e->name); |
30415d50 | 385 | } |
c8a571d8 | 386 | goto skip_write_ref; |
30415d50 JS |
387 | } |
388 | ||
389 | ref_count++; | |
f2fd0760 | 390 | write_or_die(bundle_fd, oid_to_hex(&e->item->oid), 40); |
30415d50 | 391 | write_or_die(bundle_fd, " ", 1); |
fa303836 | 392 | write_or_die(bundle_fd, display_ref, strlen(display_ref)); |
30415d50 | 393 | write_or_die(bundle_fd, "\n", 1); |
c8a571d8 | 394 | skip_write_ref: |
30415d50 JS |
395 | free(ref); |
396 | } | |
30415d50 JS |
397 | |
398 | /* end header */ | |
399 | write_or_die(bundle_fd, "\n", 1); | |
d9362ef9 JK |
400 | return ref_count; |
401 | } | |
402 | ||
403 | int create_bundle(struct bundle_header *header, const char *path, | |
404 | int argc, const char **argv) | |
405 | { | |
406 | static struct lock_file lock; | |
407 | int bundle_fd = -1; | |
408 | int bundle_to_stdout; | |
409 | int ref_count = 0; | |
410 | struct rev_info revs; | |
411 | ||
412 | bundle_to_stdout = !strcmp(path, "-"); | |
413 | if (bundle_to_stdout) | |
414 | bundle_fd = 1; | |
e54c347c | 415 | else { |
d9362ef9 JK |
416 | bundle_fd = hold_lock_file_for_update(&lock, path, |
417 | LOCK_DIE_ON_ERROR); | |
418 | ||
e54c347c MH |
419 | /* |
420 | * write_pack_data() will close the fd passed to it, | |
421 | * but commit_lock_file() will also try to close the | |
422 | * lockfile's fd. So make a copy of the file | |
423 | * descriptor to avoid trying to close it twice. | |
424 | */ | |
425 | bundle_fd = dup(bundle_fd); | |
426 | if (bundle_fd < 0) | |
427 | die_errno("unable to dup file descriptor"); | |
428 | } | |
429 | ||
d9362ef9 JK |
430 | /* write signature */ |
431 | write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature)); | |
432 | ||
433 | /* init revs to list objects for pack-objects later */ | |
434 | save_commit_buffer = 0; | |
435 | init_revisions(&revs, NULL); | |
436 | ||
437 | /* write prerequisites */ | |
438 | if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv)) | |
f5ff5fb5 | 439 | goto err; |
d9362ef9 JK |
440 | |
441 | argc = setup_revisions(argc, argv, &revs, NULL); | |
442 | ||
f5ff5fb5 SB |
443 | if (argc > 1) { |
444 | error(_("unrecognized argument: %s"), argv[1]); | |
445 | goto err; | |
446 | } | |
d9362ef9 JK |
447 | |
448 | object_array_remove_duplicates(&revs.pending); | |
449 | ||
450 | ref_count = write_bundle_refs(bundle_fd, &revs); | |
451 | if (!ref_count) | |
452 | die(_("Refusing to create empty bundle.")); | |
453 | else if (ref_count < 0) | |
f5ff5fb5 | 454 | goto err; |
30415d50 JS |
455 | |
456 | /* write pack */ | |
f5ff5fb5 SB |
457 | if (write_pack_data(bundle_fd, &revs)) { |
458 | bundle_fd = -1; /* already closed by the above call */ | |
459 | goto err; | |
460 | } | |
4ed7cd3a | 461 | |
0f5cdf65 CH |
462 | if (!bundle_to_stdout) { |
463 | if (commit_lock_file(&lock)) | |
8a1e7eac | 464 | die_errno(_("cannot create '%s'"), path); |
0f5cdf65 | 465 | } |
c20181e3 | 466 | return 0; |
f5ff5fb5 SB |
467 | err: |
468 | if (!bundle_to_stdout) { | |
469 | if (0 <= bundle_fd) | |
470 | close(bundle_fd); | |
471 | rollback_lock_file(&lock); | |
472 | } | |
473 | return -1; | |
30415d50 JS |
474 | } |
475 | ||
be042aff | 476 | int unbundle(struct bundle_header *header, int bundle_fd, int flags) |
30415d50 JS |
477 | { |
478 | const char *argv_index_pack[] = {"index-pack", | |
be042aff | 479 | "--fix-thin", "--stdin", NULL, NULL}; |
d3180279 | 480 | struct child_process ip = CHILD_PROCESS_INIT; |
30415d50 | 481 | |
be042aff JH |
482 | if (flags & BUNDLE_VERBOSE) |
483 | argv_index_pack[3] = "-v"; | |
484 | ||
30415d50 JS |
485 | if (verify_bundle(header, 0)) |
486 | return -1; | |
30415d50 JS |
487 | ip.argv = argv_index_pack; |
488 | ip.in = bundle_fd; | |
489 | ip.no_stdout = 1; | |
490 | ip.git_cmd = 1; | |
491 | if (run_command(&ip)) | |
8a1e7eac | 492 | return error(_("index-pack died")); |
30415d50 JS |
493 | return 0; |
494 | } |