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Commit | Line | Data |
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30415d50 | 1 | #include "cache.h" |
697cc8ef | 2 | #include "lockfile.h" |
30415d50 | 3 | #include "bundle.h" |
cbd53a21 | 4 | #include "object-store.h" |
30415d50 JS |
5 | #include "object.h" |
6 | #include "commit.h" | |
7 | #include "diff.h" | |
8 | #include "revision.h" | |
9 | #include "list-objects.h" | |
10 | #include "run-command.h" | |
fa303836 | 11 | #include "refs.h" |
1e2371ea | 12 | #include "argv-array.h" |
30415d50 JS |
13 | |
14 | static const char bundle_signature[] = "# v2 git bundle\n"; | |
15 | ||
b8607f35 | 16 | static void add_to_ref_list(const struct object_id *oid, const char *name, |
30415d50 JS |
17 | struct ref_list *list) |
18 | { | |
5cbbe13a | 19 | ALLOC_GROW(list->list, list->nr + 1, list->alloc); |
b8607f35 | 20 | oidcpy(&list->list[list->nr].oid, oid); |
30415d50 JS |
21 | list->list[list->nr].name = xstrdup(name); |
22 | list->nr++; | |
23 | } | |
24 | ||
2727b71f JH |
25 | static int parse_bundle_header(int fd, struct bundle_header *header, |
26 | const char *report_path) | |
f3fa1838 | 27 | { |
e9ee84cf | 28 | struct strbuf buf = STRBUF_INIT; |
e9ee84cf | 29 | int status = 0; |
30415d50 | 30 | |
e9ee84cf | 31 | /* The bundle header begins with the signature */ |
5e8617f5 | 32 | if (strbuf_getwholeline_fd(&buf, fd, '\n') || |
e9ee84cf | 33 | strcmp(buf.buf, bundle_signature)) { |
2727b71f | 34 | if (report_path) |
8a1e7eac | 35 | error(_("'%s' does not look like a v2 bundle file"), |
2727b71f | 36 | report_path); |
e9ee84cf JH |
37 | status = -1; |
38 | goto abort; | |
30415d50 | 39 | } |
e9ee84cf JH |
40 | |
41 | /* The bundle header ends with an empty line */ | |
5e8617f5 | 42 | while (!strbuf_getwholeline_fd(&buf, fd, '\n') && |
e9ee84cf | 43 | buf.len && buf.buf[0] != '\n') { |
b8607f35 | 44 | struct object_id oid; |
e9ee84cf | 45 | int is_prereq = 0; |
b8607f35 | 46 | const char *p; |
e9ee84cf JH |
47 | |
48 | if (*buf.buf == '-') { | |
49 | is_prereq = 1; | |
50 | strbuf_remove(&buf, 0, 1); | |
30415d50 | 51 | } |
e9ee84cf | 52 | strbuf_rtrim(&buf); |
30415d50 | 53 | |
e9ee84cf JH |
54 | /* |
55 | * Tip lines have object name, SP, and refname. | |
56 | * Prerequisites have object name that is optionally | |
57 | * followed by SP and subject line. | |
58 | */ | |
b8607f35 | 59 | if (parse_oid_hex(buf.buf, &oid, &p) || |
60 | (*p && !isspace(*p)) || | |
61 | (!is_prereq && !*p)) { | |
2727b71f | 62 | if (report_path) |
8a1e7eac | 63 | error(_("unrecognized header: %s%s (%d)"), |
2727b71f | 64 | (is_prereq ? "-" : ""), buf.buf, (int)buf.len); |
e9ee84cf JH |
65 | status = -1; |
66 | break; | |
67 | } else { | |
68 | if (is_prereq) | |
b8607f35 | 69 | add_to_ref_list(&oid, "", &header->prerequisites); |
e9ee84cf | 70 | else |
b8607f35 | 71 | add_to_ref_list(&oid, p + 1, &header->references); |
30415d50 | 72 | } |
30415d50 | 73 | } |
e9ee84cf JH |
74 | |
75 | abort: | |
76 | if (status) { | |
77 | close(fd); | |
78 | fd = -1; | |
30415d50 | 79 | } |
e9ee84cf | 80 | strbuf_release(&buf); |
30415d50 JS |
81 | return fd; |
82 | } | |
83 | ||
2727b71f JH |
84 | int read_bundle_header(const char *path, struct bundle_header *header) |
85 | { | |
86 | int fd = open(path, O_RDONLY); | |
87 | ||
30415d50 | 88 | if (fd < 0) |
8a1e7eac | 89 | return error(_("could not open '%s'"), path); |
2727b71f JH |
90 | return parse_bundle_header(fd, header, path); |
91 | } | |
92 | ||
93 | int is_bundle(const char *path, int quiet) | |
94 | { | |
95 | struct bundle_header header; | |
96 | int fd = open(path, O_RDONLY); | |
97 | ||
98 | if (fd < 0) | |
99 | return 0; | |
100 | memset(&header, 0, sizeof(header)); | |
101 | fd = parse_bundle_header(fd, &header, quiet ? NULL : path); | |
102 | if (fd >= 0) | |
103 | close(fd); | |
104 | return (fd >= 0); | |
30415d50 JS |
105 | } |
106 | ||
107 | static int list_refs(struct ref_list *r, int argc, const char **argv) | |
108 | { | |
109 | int i; | |
110 | ||
111 | for (i = 0; i < r->nr; i++) { | |
112 | if (argc > 1) { | |
113 | int j; | |
114 | for (j = 1; j < argc; j++) | |
115 | if (!strcmp(r->list[i].name, argv[j])) | |
116 | break; | |
117 | if (j == argc) | |
118 | continue; | |
119 | } | |
b8607f35 | 120 | printf("%s %s\n", oid_to_hex(&r->list[i].oid), |
30415d50 JS |
121 | r->list[i].name); |
122 | } | |
123 | return 0; | |
124 | } | |
125 | ||
208acbfb | 126 | /* Remember to update object flag allocation in object.h */ |
30415d50 JS |
127 | #define PREREQ_MARK (1u<<16) |
128 | ||
129 | int verify_bundle(struct bundle_header *header, int verbose) | |
130 | { | |
131 | /* | |
132 | * Do fast check, then if any prereqs are missing then go line by line | |
133 | * to be verbose about the errors | |
134 | */ | |
135 | struct ref_list *p = &header->prerequisites; | |
136 | struct rev_info revs; | |
a80aad7b | 137 | const char *argv[] = {NULL, "--all", NULL}; |
30415d50 JS |
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; | |
c251c83d | 145 | struct object *o = parse_object(&e->oid); |
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 | ||
3d51e1b5 | 160 | if (prepare_revision_walk(&revs)) |
8a1e7eac | 161 | die(_("revision walk setup failed")); |
30415d50 JS |
162 | |
163 | i = req_nr; | |
164 | while (i && (commit = get_revision(&revs))) | |
165 | if (commit->object.flags & PREREQ_MARK) | |
166 | i--; | |
167 | ||
63647391 RS |
168 | for (i = 0; i < p->nr; i++) { |
169 | struct ref_list_entry *e = p->list + i; | |
170 | struct object *o = parse_object(&e->oid); | |
171 | assert(o); /* otherwise we'd have returned early */ | |
172 | if (o->flags & SHOWN) | |
173 | continue; | |
174 | if (++ret == 1) | |
175 | error("%s", message); | |
176 | error("%s %s", oid_to_hex(&e->oid), e->name); | |
177 | } | |
30415d50 | 178 | |
b2ccdf7f | 179 | /* Clean up objects used, as they will be reused. */ |
63647391 RS |
180 | for (i = 0; i < p->nr; i++) { |
181 | struct ref_list_entry *e = p->list + i; | |
182 | commit = lookup_commit_reference_gently(&e->oid, 1); | |
183 | if (commit) | |
184 | clear_commit_marks(commit, ALL_REV_FLAGS); | |
185 | } | |
30415d50 JS |
186 | |
187 | if (verbose) { | |
188 | struct ref_list *r; | |
189 | ||
190 | r = &header->references; | |
a02ffe0e LF |
191 | printf_ln(Q_("The bundle contains this ref:", |
192 | "The bundle contains these %d refs:", | |
8a1e7eac NTND |
193 | r->nr), |
194 | r->nr); | |
30415d50 | 195 | list_refs(r, 0, NULL); |
71ba6b10 | 196 | r = &header->prerequisites; |
8c3710fd JH |
197 | if (!r->nr) { |
198 | printf_ln(_("The bundle records a complete history.")); | |
199 | } else { | |
a02ffe0e LF |
200 | printf_ln(Q_("The bundle requires this ref:", |
201 | "The bundle requires these %d refs:", | |
8c3710fd JH |
202 | r->nr), |
203 | r->nr); | |
204 | list_refs(r, 0, NULL); | |
205 | } | |
30415d50 JS |
206 | } |
207 | return ret; | |
208 | } | |
209 | ||
210 | int list_bundle_refs(struct bundle_header *header, int argc, const char **argv) | |
211 | { | |
212 | return list_refs(&header->references, argc, argv); | |
213 | } | |
214 | ||
c9a42c4a JS |
215 | static int is_tag_in_date_range(struct object *tag, struct rev_info *revs) |
216 | { | |
217 | unsigned long size; | |
218 | enum object_type type; | |
64045940 | 219 | char *buf = NULL, *line, *lineend; |
dddbad72 | 220 | timestamp_t date; |
64045940 | 221 | int result = 1; |
c9a42c4a JS |
222 | |
223 | if (revs->max_age == -1 && revs->min_age == -1) | |
64045940 | 224 | goto out; |
c9a42c4a | 225 | |
b4f5aca4 | 226 | buf = read_object_file(&tag->oid, &type, &size); |
c9a42c4a | 227 | if (!buf) |
64045940 | 228 | goto out; |
c9a42c4a JS |
229 | line = memmem(buf, size, "\ntagger ", 8); |
230 | if (!line++) | |
64045940 | 231 | goto out; |
2c8544ab LF |
232 | lineend = memchr(line, '\n', buf + size - line); |
233 | line = memchr(line, '>', lineend ? lineend - line : buf + size - line); | |
c9a42c4a | 234 | if (!line++) |
64045940 | 235 | goto out; |
1aeb7e75 | 236 | date = parse_timestamp(line, NULL, 10); |
64045940 | 237 | result = (revs->max_age == -1 || revs->max_age < date) && |
c9a42c4a | 238 | (revs->min_age == -1 || revs->min_age > date); |
64045940 RS |
239 | out: |
240 | free(buf); | |
241 | return result; | |
c9a42c4a JS |
242 | } |
243 | ||
e54c347c MH |
244 | |
245 | /* Write the pack data to bundle_fd, then close it if it is > 1. */ | |
246 | static int write_pack_data(int bundle_fd, struct rev_info *revs) | |
5e626b91 JH |
247 | { |
248 | struct child_process pack_objects = CHILD_PROCESS_INIT; | |
249 | int i; | |
250 | ||
251 | argv_array_pushl(&pack_objects.args, | |
252 | "pack-objects", "--all-progress-implied", | |
253 | "--stdout", "--thin", "--delta-base-offset", | |
254 | NULL); | |
255 | pack_objects.in = -1; | |
256 | pack_objects.out = bundle_fd; | |
257 | pack_objects.git_cmd = 1; | |
258 | if (start_command(&pack_objects)) | |
259 | return error(_("Could not spawn pack-objects")); | |
260 | ||
5e626b91 JH |
261 | for (i = 0; i < revs->pending.nr; i++) { |
262 | struct object *object = revs->pending.objects[i].item; | |
263 | if (object->flags & UNINTERESTING) | |
264 | write_or_die(pack_objects.in, "^", 1); | |
f2fd0760 | 265 | write_or_die(pack_objects.in, oid_to_hex(&object->oid), GIT_SHA1_HEXSZ); |
5e626b91 JH |
266 | write_or_die(pack_objects.in, "\n", 1); |
267 | } | |
268 | close(pack_objects.in); | |
269 | if (finish_command(&pack_objects)) | |
270 | return error(_("pack-objects died")); | |
271 | return 0; | |
272 | } | |
273 | ||
e8eb2512 JH |
274 | static int compute_and_write_prerequisites(int bundle_fd, |
275 | struct rev_info *revs, | |
276 | int argc, const char **argv) | |
30415d50 | 277 | { |
d3180279 | 278 | struct child_process rls = CHILD_PROCESS_INIT; |
e8eb2512 | 279 | struct strbuf buf = STRBUF_INIT; |
30415d50 | 280 | FILE *rls_fout; |
e8eb2512 | 281 | int i; |
30415d50 | 282 | |
92859f3a | 283 | argv_array_pushl(&rls.args, |
1e2371ea JH |
284 | "rev-list", "--boundary", "--pretty=oneline", |
285 | NULL); | |
286 | for (i = 1; i < argc; i++) | |
92859f3a | 287 | argv_array_push(&rls.args, argv[i]); |
30415d50 JS |
288 | rls.out = -1; |
289 | rls.git_cmd = 1; | |
290 | if (start_command(&rls)) | |
291 | return -1; | |
41698375 | 292 | rls_fout = xfdopen(rls.out, "r"); |
bc2fed49 | 293 | while (strbuf_getwholeline(&buf, rls_fout, '\n') != EOF) { |
b8607f35 | 294 | struct object_id oid; |
bc2fed49 TR |
295 | if (buf.len > 0 && buf.buf[0] == '-') { |
296 | write_or_die(bundle_fd, buf.buf, buf.len); | |
b8607f35 | 297 | if (!get_oid_hex(buf.buf + 1, &oid)) { |
c251c83d | 298 | struct object *object = parse_object_or_die(&oid, |
299 | buf.buf); | |
30415d50 | 300 | object->flags |= UNINTERESTING; |
e8eb2512 | 301 | add_pending_object(revs, object, buf.buf); |
30415d50 | 302 | } |
b8607f35 | 303 | } else if (!get_oid_hex(buf.buf, &oid)) { |
c251c83d | 304 | struct object *object = parse_object_or_die(&oid, |
305 | buf.buf); | |
30415d50 JS |
306 | object->flags |= SHOWN; |
307 | } | |
308 | } | |
bc2fed49 | 309 | strbuf_release(&buf); |
30415d50 JS |
310 | fclose(rls_fout); |
311 | if (finish_command(&rls)) | |
8a1e7eac | 312 | return error(_("rev-list died")); |
e8eb2512 JH |
313 | return 0; |
314 | } | |
315 | ||
d9362ef9 JK |
316 | /* |
317 | * Write out bundle refs based on the tips already | |
318 | * parsed into revs.pending. As a side effect, may | |
319 | * manipulate revs.pending to include additional | |
320 | * necessary objects (like tags). | |
321 | * | |
322 | * Returns the number of refs written, or negative | |
323 | * on error. | |
324 | */ | |
325 | static int write_bundle_refs(int bundle_fd, struct rev_info *revs) | |
e8eb2512 | 326 | { |
d9362ef9 JK |
327 | int i; |
328 | int ref_count = 0; | |
b2a6d1c6 | 329 | |
d9362ef9 JK |
330 | for (i = 0; i < revs->pending.nr; i++) { |
331 | struct object_array_entry *e = revs->pending.objects + i; | |
f2fd0760 | 332 | struct object_id oid; |
30415d50 | 333 | char *ref; |
fa303836 JH |
334 | const char *display_ref; |
335 | int flag; | |
30415d50 JS |
336 | |
337 | if (e->item->flags & UNINTERESTING) | |
338 | continue; | |
cca5fa64 | 339 | if (dwim_ref(e->name, strlen(e->name), &oid, &ref) != 1) |
c8a571d8 | 340 | goto skip_write_ref; |
34c290a6 | 341 | if (read_ref_full(e->name, RESOLVE_REF_READING, &oid, &flag)) |
fa303836 JH |
342 | flag = 0; |
343 | display_ref = (flag & REF_ISSYMREF) ? e->name : ref; | |
344 | ||
c9a42c4a | 345 | if (e->item->type == OBJ_TAG && |
d9362ef9 | 346 | !is_tag_in_date_range(e->item, revs)) { |
c9a42c4a | 347 | e->item->flags |= UNINTERESTING; |
c8a571d8 | 348 | goto skip_write_ref; |
c9a42c4a JS |
349 | } |
350 | ||
30415d50 JS |
351 | /* |
352 | * Make sure the refs we wrote out is correct; --max-count and | |
353 | * other limiting options could have prevented all the tips | |
354 | * from getting output. | |
355 | * | |
356 | * Non commit objects such as tags and blobs do not have | |
357 | * this issue as they are not affected by those extra | |
358 | * constraints. | |
359 | */ | |
360 | if (!(e->item->flags & SHOWN) && e->item->type == OBJ_COMMIT) { | |
8a1e7eac | 361 | warning(_("ref '%s' is excluded by the rev-list options"), |
30415d50 | 362 | e->name); |
c8a571d8 | 363 | goto skip_write_ref; |
30415d50 JS |
364 | } |
365 | /* | |
366 | * If you run "git bundle create bndl v1.0..v2.0", the | |
367 | * name of the positive ref is "v2.0" but that is the | |
368 | * commit that is referenced by the tag, and not the tag | |
369 | * itself. | |
370 | */ | |
f2fd0760 | 371 | if (oidcmp(&oid, &e->item->oid)) { |
30415d50 JS |
372 | /* |
373 | * Is this the positive end of a range expressed | |
374 | * in terms of a tag (e.g. v2.0 from the range | |
375 | * "v1.0..v2.0")? | |
376 | */ | |
bc83266a | 377 | struct commit *one = lookup_commit_reference(&oid); |
30415d50 JS |
378 | struct object *obj; |
379 | ||
380 | if (e->item == &(one->object)) { | |
381 | /* | |
382 | * Need to include e->name as an | |
383 | * independent ref to the pack-objects | |
384 | * input, so that the tag is included | |
385 | * in the output; otherwise we would | |
386 | * end up triggering "empty bundle" | |
387 | * error. | |
388 | */ | |
c251c83d | 389 | obj = parse_object_or_die(&oid, e->name); |
30415d50 | 390 | obj->flags |= SHOWN; |
d9362ef9 | 391 | add_pending_object(revs, obj, e->name); |
30415d50 | 392 | } |
c8a571d8 | 393 | goto skip_write_ref; |
30415d50 JS |
394 | } |
395 | ||
396 | ref_count++; | |
f2fd0760 | 397 | write_or_die(bundle_fd, oid_to_hex(&e->item->oid), 40); |
30415d50 | 398 | write_or_die(bundle_fd, " ", 1); |
fa303836 | 399 | write_or_die(bundle_fd, display_ref, strlen(display_ref)); |
30415d50 | 400 | write_or_die(bundle_fd, "\n", 1); |
c8a571d8 | 401 | skip_write_ref: |
30415d50 JS |
402 | free(ref); |
403 | } | |
30415d50 JS |
404 | |
405 | /* end header */ | |
406 | write_or_die(bundle_fd, "\n", 1); | |
d9362ef9 JK |
407 | return ref_count; |
408 | } | |
409 | ||
410 | int create_bundle(struct bundle_header *header, const char *path, | |
411 | int argc, const char **argv) | |
412 | { | |
b2275868 | 413 | struct lock_file lock = LOCK_INIT; |
d9362ef9 JK |
414 | int bundle_fd = -1; |
415 | int bundle_to_stdout; | |
416 | int ref_count = 0; | |
417 | struct rev_info revs; | |
418 | ||
419 | bundle_to_stdout = !strcmp(path, "-"); | |
420 | if (bundle_to_stdout) | |
421 | bundle_fd = 1; | |
e54c347c | 422 | else { |
d9362ef9 JK |
423 | bundle_fd = hold_lock_file_for_update(&lock, path, |
424 | LOCK_DIE_ON_ERROR); | |
425 | ||
e54c347c MH |
426 | /* |
427 | * write_pack_data() will close the fd passed to it, | |
428 | * but commit_lock_file() will also try to close the | |
429 | * lockfile's fd. So make a copy of the file | |
430 | * descriptor to avoid trying to close it twice. | |
431 | */ | |
432 | bundle_fd = dup(bundle_fd); | |
433 | if (bundle_fd < 0) | |
434 | die_errno("unable to dup file descriptor"); | |
435 | } | |
436 | ||
d9362ef9 JK |
437 | /* write signature */ |
438 | write_or_die(bundle_fd, bundle_signature, strlen(bundle_signature)); | |
439 | ||
440 | /* init revs to list objects for pack-objects later */ | |
441 | save_commit_buffer = 0; | |
442 | init_revisions(&revs, NULL); | |
443 | ||
444 | /* write prerequisites */ | |
445 | if (compute_and_write_prerequisites(bundle_fd, &revs, argc, argv)) | |
f5ff5fb5 | 446 | goto err; |
d9362ef9 JK |
447 | |
448 | argc = setup_revisions(argc, argv, &revs, NULL); | |
449 | ||
f5ff5fb5 SB |
450 | if (argc > 1) { |
451 | error(_("unrecognized argument: %s"), argv[1]); | |
452 | goto err; | |
453 | } | |
d9362ef9 JK |
454 | |
455 | object_array_remove_duplicates(&revs.pending); | |
456 | ||
457 | ref_count = write_bundle_refs(bundle_fd, &revs); | |
458 | if (!ref_count) | |
459 | die(_("Refusing to create empty bundle.")); | |
460 | else if (ref_count < 0) | |
f5ff5fb5 | 461 | goto err; |
30415d50 JS |
462 | |
463 | /* write pack */ | |
f5ff5fb5 SB |
464 | if (write_pack_data(bundle_fd, &revs)) { |
465 | bundle_fd = -1; /* already closed by the above call */ | |
466 | goto err; | |
467 | } | |
4ed7cd3a | 468 | |
0f5cdf65 CH |
469 | if (!bundle_to_stdout) { |
470 | if (commit_lock_file(&lock)) | |
8a1e7eac | 471 | die_errno(_("cannot create '%s'"), path); |
0f5cdf65 | 472 | } |
c20181e3 | 473 | return 0; |
f5ff5fb5 SB |
474 | err: |
475 | if (!bundle_to_stdout) { | |
476 | if (0 <= bundle_fd) | |
477 | close(bundle_fd); | |
478 | rollback_lock_file(&lock); | |
479 | } | |
480 | return -1; | |
30415d50 JS |
481 | } |
482 | ||
be042aff | 483 | int unbundle(struct bundle_header *header, int bundle_fd, int flags) |
30415d50 JS |
484 | { |
485 | const char *argv_index_pack[] = {"index-pack", | |
be042aff | 486 | "--fix-thin", "--stdin", NULL, NULL}; |
d3180279 | 487 | struct child_process ip = CHILD_PROCESS_INIT; |
30415d50 | 488 | |
be042aff JH |
489 | if (flags & BUNDLE_VERBOSE) |
490 | argv_index_pack[3] = "-v"; | |
491 | ||
30415d50 JS |
492 | if (verify_bundle(header, 0)) |
493 | return -1; | |
30415d50 JS |
494 | ip.argv = argv_index_pack; |
495 | ip.in = bundle_fd; | |
496 | ip.no_stdout = 1; | |
497 | ip.git_cmd = 1; | |
498 | if (run_command(&ip)) | |
8a1e7eac | 499 | return error(_("index-pack died")); |
30415d50 JS |
500 | return 0; |
501 | } |