?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Sync with 'maint'
[git.git] / http-push.c
blob7315a694aa4b8aed50ad5cf4a14334fcdab41e75
1 #define USE_THE_REPOSITORY_VARIABLE
2
3 #include "git-compat-util.h"
4 #include "environment.h"
5 #include "hex.h"
6 #include "repository.h"
7 #include "commit.h"
8 #include "tag.h"
9 #include "blob.h"
10 #include "http.h"
11 #include "diff.h"
12 #include "revision.h"
13 #include "remote.h"
14 #include "list-objects.h"
15 #include "setup.h"
16 #include "sigchain.h"
17 #include "strvec.h"
18 #include "tree.h"
19 #include "tree-walk.h"
20 #include "url.h"
21 #include "packfile.h"
22 #include "object-store-ll.h"
23 #include "commit-reach.h"
24
25 #ifdef EXPAT_NEEDS_XMLPARSE_H
26 #include <xmlparse.h>
27 #else
28 #include <expat.h>
29 #endif
30
31 static const char http_push_usage[] =
32 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
33
34 #ifndef XML_STATUS_OK
35 enum XML_Status {
36 XML_STATUS_OK = 1,
37 XML_STATUS_ERROR = 0
38 };
39 #define XML_STATUS_OK 1
40 #define XML_STATUS_ERROR 0
41 #endif
42
43 #define PREV_BUF_SIZE 4096
44
45 /* DAV methods */
46 #define DAV_LOCK "LOCK"
47 #define DAV_MKCOL "MKCOL"
48 #define DAV_MOVE "MOVE"
49 #define DAV_PROPFIND "PROPFIND"
50 #define DAV_PUT "PUT"
51 #define DAV_UNLOCK "UNLOCK"
52 #define DAV_DELETE "DELETE"
53
54 /* DAV lock flags */
55 #define DAV_PROP_LOCKWR (1u << 0)
56 #define DAV_PROP_LOCKEX (1u << 1)
57 #define DAV_LOCK_OK (1u << 2)
58
59 /* DAV XML properties */
60 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
61 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
62 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
63 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
64 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
65 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
66 #define DAV_PROPFIND_RESP ".multistatus.response"
67 #define DAV_PROPFIND_NAME ".multistatus.response.href"
68 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
69
70 /* DAV request body templates */
71 #define PROPFIND_SUPPORTEDLOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:prop xmlns:R=\"%s\">\n<D:supportedlock/>\n</D:prop>\n</D:propfind>"
72 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
73 #define LOCK_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:lockinfo xmlns:D=\"DAV:\">\n<D:lockscope><D:exclusive/></D:lockscope>\n<D:locktype><D:write/></D:locktype>\n<D:owner>\n<D:href>mailto:%s</D:href>\n</D:owner>\n</D:lockinfo>"
74
75 #define LOCK_TIME 600
76 #define LOCK_REFRESH 30
77
78 /* Remember to update object flag allocation in object.h */
79 #define LOCAL (1u<<11)
80 #define REMOTE (1u<<12)
81 #define FETCHING (1u<<13)
82 #define PUSHING (1u<<14)
83
84 /* We allow "recursive" symbolic refs. Only within reason, though */
85 #define MAXDEPTH 5
86
87 static int pushing;
88 static int aborted;
89 static signed char remote_dir_exists[256];
90
91 static int push_verbosely;
92 static int push_all = MATCH_REFS_NONE;
93 static int force_all;
94 static int dry_run;
95 static int helper_status;
96
97 static struct object_list *objects;
98
99 struct repo {
100 char *url;
101 char *path;
102 int path_len;
103 int has_info_refs;
104 int can_update_info_refs;
105 int has_info_packs;
106 struct packed_git *packs;
107 struct remote_lock *locks;
108 };
109
110 static struct repo *repo;
111
112 enum transfer_state {
113 NEED_FETCH,
114 RUN_FETCH_LOOSE,
115 RUN_FETCH_PACKED,
116 NEED_PUSH,
117 RUN_MKCOL,
118 RUN_PUT,
119 RUN_MOVE,
120 ABORTED,
121 COMPLETE
122 };
123
124 struct transfer_request {
125 struct object *obj;
126 struct packed_git *target;
127 char *url;
128 char *dest;
129 struct remote_lock *lock;
130 struct curl_slist *headers;
131 struct buffer buffer;
132 enum transfer_state state;
133 CURLcode curl_result;
134 char errorstr[CURL_ERROR_SIZE];
135 long http_code;
136 void *userData;
137 struct active_request_slot *slot;
138 struct transfer_request *next;
139 };
140
141 static struct transfer_request *request_queue_head;
142
143 struct xml_ctx {
144 char *name;
145 int len;
146 char *cdata;
147 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
148 void *userData;
149 };
150
151 struct remote_lock {
152 char *url;
153 char *owner;
154 char *token;
155 char tmpfile_suffix[GIT_MAX_HEXSZ + 1];
156 time_t start_time;
157 long timeout;
158 int refreshing;
159 struct remote_lock *next;
160 };
161
162 /* Flags that control remote_ls processing */
163 #define PROCESS_FILES (1u << 0)
164 #define PROCESS_DIRS (1u << 1)
165 #define RECURSIVE (1u << 2)
166
167 /* Flags that remote_ls passes to callback functions */
168 #define IS_DIR (1u << 0)
169
170 struct remote_ls_ctx {
171 char *path;
172 void (*userFunc)(struct remote_ls_ctx *ls);
173 void *userData;
174 int flags;
175 char *dentry_name;
176 int dentry_flags;
177 struct remote_ls_ctx *parent;
178 };
179
180 /* get_dav_token_headers options */
181 enum dav_header_flag {
182 DAV_HEADER_IF = (1u << 0),
183 DAV_HEADER_LOCK = (1u << 1),
184 DAV_HEADER_TIMEOUT = (1u << 2)
185 };
186
187 static char *xml_entities(const char *s)
188 {
189 struct strbuf buf = STRBUF_INIT;
190 strbuf_addstr_xml_quoted(&buf, s);
191 return strbuf_detach(&buf, NULL);
192 }
193
194 static void curl_setup_http_get(CURL *curl, const char *url,
195 const char *custom_req)
196 {
197 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
198 curl_easy_setopt(curl, CURLOPT_URL, url);
199 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
200 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
201 }
202
203 static void curl_setup_http(CURL *curl, const char *url,
204 const char *custom_req, struct buffer *buffer,
205 curl_write_callback write_fn)
206 {
207 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
208 curl_easy_setopt(curl, CURLOPT_URL, url);
209 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
210 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
211 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
212 curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
213 curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
214 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
215 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
216 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
217 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
218 }
219
220 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
221 {
222 struct strbuf buf = STRBUF_INIT;
223 struct curl_slist *dav_headers = http_copy_default_headers();
224
225 if (options & DAV_HEADER_IF) {
226 strbuf_addf(&buf, "If: (<%s>)", lock->token);
227 dav_headers = curl_slist_append(dav_headers, buf.buf);
228 strbuf_reset(&buf);
229 }
230 if (options & DAV_HEADER_LOCK) {
231 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
232 dav_headers = curl_slist_append(dav_headers, buf.buf);
233 strbuf_reset(&buf);
234 }
235 if (options & DAV_HEADER_TIMEOUT) {
236 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
237 dav_headers = curl_slist_append(dav_headers, buf.buf);
238 strbuf_reset(&buf);
239 }
240 strbuf_release(&buf);
241
242 return dav_headers;
243 }
244
245 static void finish_request(struct transfer_request *request);
246 static void release_request(struct transfer_request *request);
247
248 static void process_response(void *callback_data)
249 {
250 struct transfer_request *request =
251 (struct transfer_request *)callback_data;
252
253 finish_request(request);
254 }
255
256 static void start_fetch_loose(struct transfer_request *request)
257 {
258 struct active_request_slot *slot;
259 struct http_object_request *obj_req;
260
261 obj_req = new_http_object_request(repo->url, &request->obj->oid);
262 if (!obj_req) {
263 request->state = ABORTED;
264 return;
265 }
266
267 slot = obj_req->slot;
268 slot->callback_func = process_response;
269 slot->callback_data = request;
270 request->slot = slot;
271 request->userData = obj_req;
272
273 /* Try to get the request started, abort the request on error */
274 request->state = RUN_FETCH_LOOSE;
275 if (!start_active_slot(slot)) {
276 fprintf(stderr, "Unable to start GET request\n");
277 repo->can_update_info_refs = 0;
278 release_http_object_request(obj_req);
279 release_request(request);
280 }
281 }
282
283 static void start_mkcol(struct transfer_request *request)
284 {
285 char *hex = oid_to_hex(&request->obj->oid);
286 struct active_request_slot *slot;
287
288 request->url = get_remote_object_url(repo->url, hex, 1);
289
290 slot = get_active_slot();
291 slot->callback_func = process_response;
292 slot->callback_data = request;
293 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
294 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
295
296 if (start_active_slot(slot)) {
297 request->slot = slot;
298 request->state = RUN_MKCOL;
299 } else {
300 request->state = ABORTED;
301 FREE_AND_NULL(request->url);
302 }
303 }
304
305 static void start_fetch_packed(struct transfer_request *request)
306 {
307 struct packed_git *target;
308
309 struct transfer_request *check_request = request_queue_head;
310 struct http_pack_request *preq;
311
312 target = find_sha1_pack(request->obj->oid.hash, repo->packs);
313 if (!target) {
314 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
315 repo->can_update_info_refs = 0;
316 release_request(request);
317 return;
318 }
319 close_pack_index(target);
320 request->target = target;
321
322 fprintf(stderr, "Fetching pack %s\n",
323 hash_to_hex(target->hash));
324 fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
325
326 preq = new_http_pack_request(target->hash, repo->url);
327 if (!preq) {
328 repo->can_update_info_refs = 0;
329 return;
330 }
331
332 /* Make sure there isn't another open request for this pack */
333 while (check_request) {
334 if (check_request->state == RUN_FETCH_PACKED &&
335 !strcmp(check_request->url, preq->url)) {
336 release_http_pack_request(preq);
337 release_request(request);
338 return;
339 }
340 check_request = check_request->next;
341 }
342
343 preq->slot->callback_func = process_response;
344 preq->slot->callback_data = request;
345 request->slot = preq->slot;
346 request->userData = preq;
347
348 /* Try to get the request started, abort the request on error */
349 request->state = RUN_FETCH_PACKED;
350 if (!start_active_slot(preq->slot)) {
351 fprintf(stderr, "Unable to start GET request\n");
352 release_http_pack_request(preq);
353 repo->can_update_info_refs = 0;
354 release_request(request);
355 }
356 }
357
358 static void start_put(struct transfer_request *request)
359 {
360 char *hex = oid_to_hex(&request->obj->oid);
361 struct active_request_slot *slot;
362 struct strbuf buf = STRBUF_INIT;
363 enum object_type type;
364 char hdr[50];
365 void *unpacked;
366 unsigned long len;
367 int hdrlen;
368 ssize_t size;
369 git_zstream stream;
370
371 unpacked = repo_read_object_file(the_repository, &request->obj->oid,
372 &type, &len);
373 hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
374
375 /* Set it up */
376 git_deflate_init(&stream, zlib_compression_level);
377 size = git_deflate_bound(&stream, len + hdrlen);
378 strbuf_init(&request->buffer.buf, size);
379 request->buffer.posn = 0;
380
381 /* Compress it */
382 stream.next_out = (unsigned char *)request->buffer.buf.buf;
383 stream.avail_out = size;
384
385 /* First header.. */
386 stream.next_in = (void *)hdr;
387 stream.avail_in = hdrlen;
388 while (git_deflate(&stream, 0) == Z_OK)
389 ; /* nothing */
390
391 /* Then the data itself.. */
392 stream.next_in = unpacked;
393 stream.avail_in = len;
394 while (git_deflate(&stream, Z_FINISH) == Z_OK)
395 ; /* nothing */
396 git_deflate_end(&stream);
397 free(unpacked);
398
399 request->buffer.buf.len = stream.total_out;
400
401 strbuf_addstr(&buf, "Destination: ");
402 append_remote_object_url(&buf, repo->url, hex, 0);
403 request->dest = strbuf_detach(&buf, NULL);
404
405 append_remote_object_url(&buf, repo->url, hex, 0);
406 strbuf_add(&buf, request->lock->tmpfile_suffix, the_hash_algo->hexsz + 1);
407 request->url = strbuf_detach(&buf, NULL);
408
409 slot = get_active_slot();
410 slot->callback_func = process_response;
411 slot->callback_data = request;
412 curl_setup_http(slot->curl, request->url, DAV_PUT,
413 &request->buffer, fwrite_null);
414
415 if (start_active_slot(slot)) {
416 request->slot = slot;
417 request->state = RUN_PUT;
418 } else {
419 request->state = ABORTED;
420 FREE_AND_NULL(request->url);
421 }
422 }
423
424 static void start_move(struct transfer_request *request)
425 {
426 struct active_request_slot *slot;
427 struct curl_slist *dav_headers = http_copy_default_headers();
428
429 slot = get_active_slot();
430 slot->callback_func = process_response;
431 slot->callback_data = request;
432 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
433 dav_headers = curl_slist_append(dav_headers, request->dest);
434 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
435 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
436
437 if (start_active_slot(slot)) {
438 request->slot = slot;
439 request->state = RUN_MOVE;
440 } else {
441 request->state = ABORTED;
442 FREE_AND_NULL(request->url);
443 }
444 }
445
446 static int refresh_lock(struct remote_lock *lock)
447 {
448 struct active_request_slot *slot;
449 struct slot_results results;
450 struct curl_slist *dav_headers;
451 int rc = 0;
452
453 lock->refreshing = 1;
454
455 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
456
457 slot = get_active_slot();
458 slot->results = &results;
459 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
460 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
461
462 if (start_active_slot(slot)) {
463 run_active_slot(slot);
464 if (results.curl_result != CURLE_OK) {
465 fprintf(stderr, "LOCK HTTP error %ld\n",
466 results.http_code);
467 } else {
468 lock->start_time = time(NULL);
469 rc = 1;
470 }
471 }
472
473 lock->refreshing = 0;
474 curl_slist_free_all(dav_headers);
475
476 return rc;
477 }
478
479 static void check_locks(void)
480 {
481 struct remote_lock *lock = repo->locks;
482 time_t current_time = time(NULL);
483 int time_remaining;
484
485 while (lock) {
486 time_remaining = lock->start_time + lock->timeout -
487 current_time;
488 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
489 if (!refresh_lock(lock)) {
490 fprintf(stderr,
491 "Unable to refresh lock for %s\n",
492 lock->url);
493 aborted = 1;
494 return;
495 }
496 }
497 lock = lock->next;
498 }
499 }
500
501 static void release_request(struct transfer_request *request)
502 {
503 struct transfer_request *entry = request_queue_head;
504
505 if (request == request_queue_head) {
506 request_queue_head = request->next;
507 } else {
508 while (entry && entry->next != request)
509 entry = entry->next;
510 if (entry)
511 entry->next = request->next;
512 }
513
514 free(request->url);
515 free(request);
516 }
517
518 static void finish_request(struct transfer_request *request)
519 {
520 struct http_pack_request *preq;
521 struct http_object_request *obj_req;
522
523 request->curl_result = request->slot->curl_result;
524 request->http_code = request->slot->http_code;
525 request->slot = NULL;
526
527 /* Keep locks active */
528 check_locks();
529
530 if (request->headers)
531 curl_slist_free_all(request->headers);
532
533 /* URL is reused for MOVE after PUT and used during FETCH */
534 if (request->state != RUN_PUT && request->state != RUN_FETCH_PACKED) {
535 FREE_AND_NULL(request->url);
536 }
537
538 if (request->state == RUN_MKCOL) {
539 if (request->curl_result == CURLE_OK ||
540 request->http_code == 405) {
541 remote_dir_exists[request->obj->oid.hash[0]] = 1;
542 start_put(request);
543 } else {
544 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
545 oid_to_hex(&request->obj->oid),
546 request->curl_result, request->http_code);
547 request->state = ABORTED;
548 aborted = 1;
549 }
550 } else if (request->state == RUN_PUT) {
551 if (request->curl_result == CURLE_OK) {
552 start_move(request);
553 } else {
554 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
555 oid_to_hex(&request->obj->oid),
556 request->curl_result, request->http_code);
557 request->state = ABORTED;
558 aborted = 1;
559 }
560 } else if (request->state == RUN_MOVE) {
561 if (request->curl_result == CURLE_OK) {
562 if (push_verbosely)
563 fprintf(stderr, " sent %s\n",
564 oid_to_hex(&request->obj->oid));
565 request->obj->flags |= REMOTE;
566 release_request(request);
567 } else {
568 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
569 oid_to_hex(&request->obj->oid),
570 request->curl_result, request->http_code);
571 request->state = ABORTED;
572 aborted = 1;
573 }
574 } else if (request->state == RUN_FETCH_LOOSE) {
575 obj_req = (struct http_object_request *)request->userData;
576
577 if (finish_http_object_request(obj_req) == 0)
578 if (obj_req->rename == 0)
579 request->obj->flags |= (LOCAL | REMOTE);
580
581 /* Try fetching packed if necessary */
582 if (request->obj->flags & LOCAL) {
583 release_http_object_request(obj_req);
584 release_request(request);
585 } else
586 start_fetch_packed(request);
587
588 } else if (request->state == RUN_FETCH_PACKED) {
589 int fail = 1;
590 if (request->curl_result != CURLE_OK) {
591 fprintf(stderr, "Unable to get pack file %s\n%s",
592 request->url, curl_errorstr);
593 } else {
594 preq = (struct http_pack_request *)request->userData;
595
596 if (preq) {
597 if (finish_http_pack_request(preq) == 0)
598 fail = 0;
599 release_http_pack_request(preq);
600 }
601 }
602 if (fail)
603 repo->can_update_info_refs = 0;
604 else
605 http_install_packfile(request->target, &repo->packs);
606 release_request(request);
607 }
608 }
609
610 static int is_running_queue;
611 static int fill_active_slot(void *data UNUSED)
612 {
613 struct transfer_request *request;
614
615 if (aborted || !is_running_queue)
616 return 0;
617
618 for (request = request_queue_head; request; request = request->next) {
619 if (request->state == NEED_FETCH) {
620 start_fetch_loose(request);
621 return 1;
622 } else if (pushing && request->state == NEED_PUSH) {
623 if (remote_dir_exists[request->obj->oid.hash[0]] == 1) {
624 start_put(request);
625 } else {
626 start_mkcol(request);
627 }
628 return 1;
629 }
630 }
631 return 0;
632 }
633
634 static void get_remote_object_list(unsigned char parent);
635
636 static void add_fetch_request(struct object *obj)
637 {
638 struct transfer_request *request;
639
640 check_locks();
641
642 /*
643 * Don't fetch the object if it's known to exist locally
644 * or is already in the request queue
645 */
646 if (remote_dir_exists[obj->oid.hash[0]] == -1)
647 get_remote_object_list(obj->oid.hash[0]);
648 if (obj->flags & (LOCAL | FETCHING))
649 return;
650
651 obj->flags |= FETCHING;
652 request = xmalloc(sizeof(*request));
653 request->obj = obj;
654 request->url = NULL;
655 request->lock = NULL;
656 request->headers = NULL;
657 request->state = NEED_FETCH;
658 request->next = request_queue_head;
659 request_queue_head = request;
660
661 fill_active_slots();
662 step_active_slots();
663 }
664
665 static int add_send_request(struct object *obj, struct remote_lock *lock)
666 {
667 struct transfer_request *request;
668 struct packed_git *target;
669
670 /* Keep locks active */
671 check_locks();
672
673 /*
674 * Don't push the object if it's known to exist on the remote
675 * or is already in the request queue
676 */
677 if (remote_dir_exists[obj->oid.hash[0]] == -1)
678 get_remote_object_list(obj->oid.hash[0]);
679 if (obj->flags & (REMOTE | PUSHING))
680 return 0;
681 target = find_sha1_pack(obj->oid.hash, repo->packs);
682 if (target) {
683 obj->flags |= REMOTE;
684 return 0;
685 }
686
687 obj->flags |= PUSHING;
688 request = xmalloc(sizeof(*request));
689 request->obj = obj;
690 request->url = NULL;
691 request->lock = lock;
692 request->headers = NULL;
693 request->state = NEED_PUSH;
694 request->next = request_queue_head;
695 request_queue_head = request;
696
697 fill_active_slots();
698 step_active_slots();
699
700 return 1;
701 }
702
703 static int fetch_indices(void)
704 {
705 int ret;
706
707 if (push_verbosely)
708 fprintf(stderr, "Getting pack list\n");
709
710 switch (http_get_info_packs(repo->url, &repo->packs)) {
711 case HTTP_OK:
712 case HTTP_MISSING_TARGET:
713 ret = 0;
714 break;
715 default:
716 ret = -1;
717 }
718
719 return ret;
720 }
721
722 static void one_remote_object(const struct object_id *oid)
723 {
724 struct object *obj;
725
726 obj = lookup_object(the_repository, oid);
727 if (!obj)
728 obj = parse_object(the_repository, oid);
729
730 /* Ignore remote objects that don't exist locally */
731 if (!obj)
732 return;
733
734 obj->flags |= REMOTE;
735 if (!object_list_contains(objects, obj))
736 object_list_insert(obj, &objects);
737 }
738
739 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
740 {
741 int *lock_flags = (int *)ctx->userData;
742
743 if (tag_closed) {
744 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
745 if ((*lock_flags & DAV_PROP_LOCKEX) &&
746 (*lock_flags & DAV_PROP_LOCKWR)) {
747 *lock_flags |= DAV_LOCK_OK;
748 }
749 *lock_flags &= DAV_LOCK_OK;
750 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
751 *lock_flags |= DAV_PROP_LOCKWR;
752 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
753 *lock_flags |= DAV_PROP_LOCKEX;
754 }
755 }
756 }
757
758 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
759 {
760 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
761 git_hash_ctx hash_ctx;
762 unsigned char lock_token_hash[GIT_MAX_RAWSZ];
763
764 if (tag_closed && ctx->cdata) {
765 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
766 lock->owner = xstrdup(ctx->cdata);
767 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
768 const char *arg;
769 if (skip_prefix(ctx->cdata, "Second-", &arg))
770 lock->timeout = strtol(arg, NULL, 10);
771 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
772 lock->token = xstrdup(ctx->cdata);
773
774 the_hash_algo->init_fn(&hash_ctx);
775 the_hash_algo->update_fn(&hash_ctx, lock->token, strlen(lock->token));
776 the_hash_algo->final_fn(lock_token_hash, &hash_ctx);
777
778 lock->tmpfile_suffix[0] = '_';
779 memcpy(lock->tmpfile_suffix + 1, hash_to_hex(lock_token_hash), the_hash_algo->hexsz);
780 }
781 }
782 }
783
784 static void one_remote_ref(const char *refname);
785
786 static void
787 xml_start_tag(void *userData, const char *name, const char **atts UNUSED)
788 {
789 struct xml_ctx *ctx = (struct xml_ctx *)userData;
790 const char *c = strchr(name, ':');
791 int old_namelen, new_len;
792
793 if (!c)
794 c = name;
795 else
796 c++;
797
798 old_namelen = strlen(ctx->name);
799 new_len = old_namelen + strlen(c) + 2;
800
801 if (new_len > ctx->len) {
802 ctx->name = xrealloc(ctx->name, new_len);
803 ctx->len = new_len;
804 }
805 xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
806
807 FREE_AND_NULL(ctx->cdata);
808
809 ctx->userFunc(ctx, 0);
810 }
811
812 static void
813 xml_end_tag(void *userData, const char *name)
814 {
815 struct xml_ctx *ctx = (struct xml_ctx *)userData;
816 const char *c = strchr(name, ':');
817 char *ep;
818
819 ctx->userFunc(ctx, 1);
820
821 if (!c)
822 c = name;
823 else
824 c++;
825
826 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
827 *ep = 0;
828 }
829
830 static void
831 xml_cdata(void *userData, const XML_Char *s, int len)
832 {
833 struct xml_ctx *ctx = (struct xml_ctx *)userData;
834 free(ctx->cdata);
835 ctx->cdata = xmemdupz(s, len);
836 }
837
838 static struct remote_lock *lock_remote(const char *path, long timeout)
839 {
840 struct active_request_slot *slot;
841 struct slot_results results;
842 struct buffer out_buffer = { STRBUF_INIT, 0 };
843 struct strbuf in_buffer = STRBUF_INIT;
844 char *url;
845 char *ep;
846 char timeout_header[25];
847 struct remote_lock *lock = NULL;
848 struct curl_slist *dav_headers = http_copy_default_headers();
849 struct xml_ctx ctx;
850 char *escaped;
851
852 url = xstrfmt("%s%s", repo->url, path);
853
854 /* Make sure leading directories exist for the remote ref */
855 ep = strchr(url + strlen(repo->url) + 1, '/');
856 while (ep) {
857 char saved_character = ep[1];
858 ep[1] = '\0';
859 slot = get_active_slot();
860 slot->results = &results;
861 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
862 if (start_active_slot(slot)) {
863 run_active_slot(slot);
864 if (results.curl_result != CURLE_OK &&
865 results.http_code != 405) {
866 fprintf(stderr,
867 "Unable to create branch path %s\n",
868 url);
869 free(url);
870 return NULL;
871 }
872 } else {
873 fprintf(stderr, "Unable to start MKCOL request\n");
874 free(url);
875 return NULL;
876 }
877 ep[1] = saved_character;
878 ep = strchr(ep + 1, '/');
879 }
880
881 escaped = xml_entities(ident_default_email());
882 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
883 free(escaped);
884
885 xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
886 dav_headers = curl_slist_append(dav_headers, timeout_header);
887 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
888
889 slot = get_active_slot();
890 slot->results = &results;
891 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
892 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
893 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
894
895 CALLOC_ARRAY(lock, 1);
896 lock->timeout = -1;
897
898 if (start_active_slot(slot)) {
899 run_active_slot(slot);
900 if (results.curl_result == CURLE_OK) {
901 XML_Parser parser = XML_ParserCreate(NULL);
902 enum XML_Status result;
903 ctx.name = xcalloc(10, 1);
904 ctx.len = 0;
905 ctx.cdata = NULL;
906 ctx.userFunc = handle_new_lock_ctx;
907 ctx.userData = lock;
908 XML_SetUserData(parser, &ctx);
909 XML_SetElementHandler(parser, xml_start_tag,
910 xml_end_tag);
911 XML_SetCharacterDataHandler(parser, xml_cdata);
912 result = XML_Parse(parser, in_buffer.buf,
913 in_buffer.len, 1);
914 free(ctx.name);
915 if (result != XML_STATUS_OK) {
916 fprintf(stderr, "XML error: %s\n",
917 XML_ErrorString(
918 XML_GetErrorCode(parser)));
919 lock->timeout = -1;
920 }
921 XML_ParserFree(parser);
922 } else {
923 fprintf(stderr,
924 "error: curl result=%d, HTTP code=%ld\n",
925 results.curl_result, results.http_code);
926 }
927 } else {
928 fprintf(stderr, "Unable to start LOCK request\n");
929 }
930
931 curl_slist_free_all(dav_headers);
932 strbuf_release(&out_buffer.buf);
933 strbuf_release(&in_buffer);
934
935 if (lock->token == NULL || lock->timeout <= 0) {
936 free(lock->token);
937 free(lock->owner);
938 free(url);
939 FREE_AND_NULL(lock);
940 } else {
941 lock->url = url;
942 lock->start_time = time(NULL);
943 lock->next = repo->locks;
944 repo->locks = lock;
945 }
946
947 return lock;
948 }
949
950 static int unlock_remote(struct remote_lock *lock)
951 {
952 struct active_request_slot *slot;
953 struct slot_results results;
954 struct remote_lock *prev = repo->locks;
955 struct curl_slist *dav_headers;
956 int rc = 0;
957
958 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
959
960 slot = get_active_slot();
961 slot->results = &results;
962 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
963 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
964
965 if (start_active_slot(slot)) {
966 run_active_slot(slot);
967 if (results.curl_result == CURLE_OK)
968 rc = 1;
969 else
970 fprintf(stderr, "UNLOCK HTTP error %ld\n",
971 results.http_code);
972 } else {
973 fprintf(stderr, "Unable to start UNLOCK request\n");
974 }
975
976 curl_slist_free_all(dav_headers);
977
978 if (repo->locks == lock) {
979 repo->locks = lock->next;
980 } else {
981 while (prev && prev->next != lock)
982 prev = prev->next;
983 if (prev)
984 prev->next = lock->next;
985 }
986
987 free(lock->owner);
988 free(lock->url);
989 free(lock->token);
990 free(lock);
991
992 return rc;
993 }
994
995 static void remove_locks(void)
996 {
997 struct remote_lock *lock = repo->locks;
998
999 fprintf(stderr, "Removing remote locks...\n");
1000 while (lock) {
1001 struct remote_lock *next = lock->next;
1002 unlock_remote(lock);
1003 lock = next;
1004 }
1005 }
1006
1007 static void remove_locks_on_signal(int signo)
1008 {
1009 remove_locks();
1010 sigchain_pop(signo);
1011 raise(signo);
1012 }
1013
1014 static void remote_ls(const char *path, int flags,
1015 void (*userFunc)(struct remote_ls_ctx *ls),
1016 void *userData);
1017
1018 /* extract hex from sharded "xx/x{38}" filename */
1019 static int get_oid_hex_from_objpath(const char *path, struct object_id *oid)
1020 {
1021 memset(oid->hash, 0, GIT_MAX_RAWSZ);
1022 oid->algo = hash_algo_by_ptr(the_hash_algo);
1023
1024 if (strlen(path) != the_hash_algo->hexsz + 1)
1025 return -1;
1026
1027 if (hex_to_bytes(oid->hash, path, 1))
1028 return -1;
1029 path += 2;
1030 path++; /* skip '/' */
1031
1032 return hex_to_bytes(oid->hash + 1, path, the_hash_algo->rawsz - 1);
1033 }
1034
1035 static void process_ls_object(struct remote_ls_ctx *ls)
1036 {
1037 unsigned int *parent = (unsigned int *)ls->userData;
1038 const char *path = ls->dentry_name;
1039 struct object_id oid;
1040
1041 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1042 remote_dir_exists[*parent] = 1;
1043 return;
1044 }
1045
1046 if (!skip_prefix(path, "objects/", &path) ||
1047 get_oid_hex_from_objpath(path, &oid))
1048 return;
1049
1050 one_remote_object(&oid);
1051 }
1052
1053 static void process_ls_ref(struct remote_ls_ctx *ls)
1054 {
1055 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1056 fprintf(stderr, " %s\n", ls->dentry_name);
1057 return;
1058 }
1059
1060 if (!(ls->dentry_flags & IS_DIR))
1061 one_remote_ref(ls->dentry_name);
1062 }
1063
1064 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1065 {
1066 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1067
1068 if (tag_closed) {
1069 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1070 if (ls->dentry_flags & IS_DIR) {
1071
1072 /* ensure collection names end with slash */
1073 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1074
1075 if (ls->flags & PROCESS_DIRS) {
1076 ls->userFunc(ls);
1077 }
1078 if (strcmp(ls->dentry_name, ls->path) &&
1079 ls->flags & RECURSIVE) {
1080 remote_ls(ls->dentry_name,
1081 ls->flags,
1082 ls->userFunc,
1083 ls->userData);
1084 }
1085 } else if (ls->flags & PROCESS_FILES) {
1086 ls->userFunc(ls);
1087 }
1088 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1089 char *path = ctx->cdata;
1090 if (*ctx->cdata == 'h') {
1091 path = strstr(path, "//");
1092 if (path) {
1093 path = strchr(path+2, '/');
1094 }
1095 }
1096 if (path) {
1097 const char *url = repo->url;
1098 if (repo->path)
1099 url = repo->path;
1100 if (strncmp(path, url, repo->path_len))
1101 error("Parsed path '%s' does not match url: '%s'",
1102 path, url);
1103 else {
1104 path += repo->path_len;
1105 ls->dentry_name = xstrdup(path);
1106 }
1107 }
1108 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1109 ls->dentry_flags |= IS_DIR;
1110 }
1111 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1112 FREE_AND_NULL(ls->dentry_name);
1113 ls->dentry_flags = 0;
1114 }
1115 }
1116
1117 /*
1118 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1119 * should _only_ heed the information from that file, instead of trying to
1120 * determine the refs from the remote file system (badly: it does not even
1121 * know about packed-refs).
1122 */
1123 static void remote_ls(const char *path, int flags,
1124 void (*userFunc)(struct remote_ls_ctx *ls),
1125 void *userData)
1126 {
1127 char *url = xstrfmt("%s%s", repo->url, path);
1128 struct active_request_slot *slot;
1129 struct slot_results results;
1130 struct strbuf in_buffer = STRBUF_INIT;
1131 struct buffer out_buffer = { STRBUF_INIT, 0 };
1132 struct curl_slist *dav_headers = http_copy_default_headers();
1133 struct xml_ctx ctx;
1134 struct remote_ls_ctx ls;
1135
1136 ls.flags = flags;
1137 ls.path = xstrdup(path);
1138 ls.dentry_name = NULL;
1139 ls.dentry_flags = 0;
1140 ls.userData = userData;
1141 ls.userFunc = userFunc;
1142
1143 strbuf_addstr(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1144
1145 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1146 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1147
1148 slot = get_active_slot();
1149 slot->results = &results;
1150 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1151 &out_buffer, fwrite_buffer);
1152 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1153 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1154
1155 if (start_active_slot(slot)) {
1156 run_active_slot(slot);
1157 if (results.curl_result == CURLE_OK) {
1158 XML_Parser parser = XML_ParserCreate(NULL);
1159 enum XML_Status result;
1160 ctx.name = xcalloc(10, 1);
1161 ctx.len = 0;
1162 ctx.cdata = NULL;
1163 ctx.userFunc = handle_remote_ls_ctx;
1164 ctx.userData = &ls;
1165 XML_SetUserData(parser, &ctx);
1166 XML_SetElementHandler(parser, xml_start_tag,
1167 xml_end_tag);
1168 XML_SetCharacterDataHandler(parser, xml_cdata);
1169 result = XML_Parse(parser, in_buffer.buf,
1170 in_buffer.len, 1);
1171 free(ctx.name);
1172
1173 if (result != XML_STATUS_OK) {
1174 fprintf(stderr, "XML error: %s\n",
1175 XML_ErrorString(
1176 XML_GetErrorCode(parser)));
1177 }
1178 XML_ParserFree(parser);
1179 }
1180 } else {
1181 fprintf(stderr, "Unable to start PROPFIND request\n");
1182 }
1183
1184 free(ls.path);
1185 free(url);
1186 strbuf_release(&out_buffer.buf);
1187 strbuf_release(&in_buffer);
1188 curl_slist_free_all(dav_headers);
1189 }
1190
1191 static void get_remote_object_list(unsigned char parent)
1192 {
1193 char path[] = "objects/XX/";
1194 static const char hex[] = "0123456789abcdef";
1195 unsigned int val = parent;
1196
1197 path[8] = hex[val >> 4];
1198 path[9] = hex[val & 0xf];
1199 remote_dir_exists[val] = 0;
1200 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1201 process_ls_object, &val);
1202 }
1203
1204 static int locking_available(void)
1205 {
1206 struct active_request_slot *slot;
1207 struct slot_results results;
1208 struct strbuf in_buffer = STRBUF_INIT;
1209 struct buffer out_buffer = { STRBUF_INIT, 0 };
1210 struct curl_slist *dav_headers = http_copy_default_headers();
1211 struct xml_ctx ctx;
1212 int lock_flags = 0;
1213 char *escaped;
1214
1215 escaped = xml_entities(repo->url);
1216 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1217 free(escaped);
1218
1219 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1220 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1221
1222 slot = get_active_slot();
1223 slot->results = &results;
1224 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1225 &out_buffer, fwrite_buffer);
1226 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1227 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1228
1229 if (start_active_slot(slot)) {
1230 run_active_slot(slot);
1231 if (results.curl_result == CURLE_OK) {
1232 XML_Parser parser = XML_ParserCreate(NULL);
1233 enum XML_Status result;
1234 ctx.name = xcalloc(10, 1);
1235 ctx.len = 0;
1236 ctx.cdata = NULL;
1237 ctx.userFunc = handle_lockprop_ctx;
1238 ctx.userData = &lock_flags;
1239 XML_SetUserData(parser, &ctx);
1240 XML_SetElementHandler(parser, xml_start_tag,
1241 xml_end_tag);
1242 result = XML_Parse(parser, in_buffer.buf,
1243 in_buffer.len, 1);
1244 free(ctx.name);
1245
1246 if (result != XML_STATUS_OK) {
1247 fprintf(stderr, "XML error: %s\n",
1248 XML_ErrorString(
1249 XML_GetErrorCode(parser)));
1250 lock_flags = 0;
1251 }
1252 XML_ParserFree(parser);
1253 if (!lock_flags)
1254 error("no DAV locking support on %s",
1255 repo->url);
1256
1257 } else {
1258 error("Cannot access URL %s, return code %d",
1259 repo->url, results.curl_result);
1260 lock_flags = 0;
1261 }
1262 } else {
1263 error("Unable to start PROPFIND request on %s", repo->url);
1264 }
1265
1266 strbuf_release(&out_buffer.buf);
1267 strbuf_release(&in_buffer);
1268 curl_slist_free_all(dav_headers);
1269
1270 return lock_flags;
1271 }
1272
1273 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1274 {
1275 struct object_list *entry = xmalloc(sizeof(struct object_list));
1276 entry->item = obj;
1277 entry->next = *p;
1278 *p = entry;
1279 return &entry->next;
1280 }
1281
1282 static struct object_list **process_blob(struct blob *blob,
1283 struct object_list **p)
1284 {
1285 struct object *obj = &blob->object;
1286
1287 obj->flags |= LOCAL;
1288
1289 if (obj->flags & (UNINTERESTING | SEEN))
1290 return p;
1291
1292 obj->flags |= SEEN;
1293 return add_one_object(obj, p);
1294 }
1295
1296 static struct object_list **process_tree(struct tree *tree,
1297 struct object_list **p)
1298 {
1299 struct object *obj = &tree->object;
1300 struct tree_desc desc;
1301 struct name_entry entry;
1302
1303 obj->flags |= LOCAL;
1304
1305 if (obj->flags & (UNINTERESTING | SEEN))
1306 return p;
1307 if (parse_tree(tree) < 0)
1308 die("bad tree object %s", oid_to_hex(&obj->oid));
1309
1310 obj->flags |= SEEN;
1311 p = add_one_object(obj, p);
1312
1313 init_tree_desc(&desc, &tree->object.oid, tree->buffer, tree->size);
1314
1315 while (tree_entry(&desc, &entry))
1316 switch (object_type(entry.mode)) {
1317 case OBJ_TREE:
1318 p = process_tree(lookup_tree(the_repository, &entry.oid),
1319 p);
1320 break;
1321 case OBJ_BLOB:
1322 p = process_blob(lookup_blob(the_repository, &entry.oid),
1323 p);
1324 break;
1325 default:
1326 /* Subproject commit - not in this repository */
1327 break;
1328 }
1329
1330 free_tree_buffer(tree);
1331 return p;
1332 }
1333
1334 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1335 {
1336 int i;
1337 struct commit *commit;
1338 struct object_list **p = &objects;
1339 int count = 0;
1340
1341 while ((commit = get_revision(revs)) != NULL) {
1342 p = process_tree(repo_get_commit_tree(the_repository, commit),
1343 p);
1344 commit->object.flags |= LOCAL;
1345 if (!(commit->object.flags & UNINTERESTING))
1346 count += add_send_request(&commit->object, lock);
1347 }
1348
1349 for (i = 0; i < revs->pending.nr; i++) {
1350 struct object_array_entry *entry = revs->pending.objects + i;
1351 struct object *obj = entry->item;
1352 const char *name = entry->name;
1353
1354 if (obj->flags & (UNINTERESTING | SEEN))
1355 continue;
1356 if (obj->type == OBJ_TAG) {
1357 obj->flags |= SEEN;
1358 p = add_one_object(obj, p);
1359 continue;
1360 }
1361 if (obj->type == OBJ_TREE) {
1362 p = process_tree((struct tree *)obj, p);
1363 continue;
1364 }
1365 if (obj->type == OBJ_BLOB) {
1366 p = process_blob((struct blob *)obj, p);
1367 continue;
1368 }
1369 die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
1370 }
1371
1372 while (objects) {
1373 if (!(objects->item->flags & UNINTERESTING))
1374 count += add_send_request(objects->item, lock);
1375 objects = objects->next;
1376 }
1377
1378 return count;
1379 }
1380
1381 static int update_remote(const struct object_id *oid, struct remote_lock *lock)
1382 {
1383 struct active_request_slot *slot;
1384 struct slot_results results;
1385 struct buffer out_buffer = { STRBUF_INIT, 0 };
1386 struct curl_slist *dav_headers;
1387
1388 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1389
1390 strbuf_addf(&out_buffer.buf, "%s\n", oid_to_hex(oid));
1391
1392 slot = get_active_slot();
1393 slot->results = &results;
1394 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1395 &out_buffer, fwrite_null);
1396 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1397
1398 if (start_active_slot(slot)) {
1399 run_active_slot(slot);
1400 strbuf_release(&out_buffer.buf);
1401 if (results.curl_result != CURLE_OK) {
1402 fprintf(stderr,
1403 "PUT error: curl result=%d, HTTP code=%ld\n",
1404 results.curl_result, results.http_code);
1405 /* We should attempt recovery? */
1406 return 0;
1407 }
1408 } else {
1409 strbuf_release(&out_buffer.buf);
1410 fprintf(stderr, "Unable to start PUT request\n");
1411 return 0;
1412 }
1413
1414 return 1;
1415 }
1416
1417 static struct ref *remote_refs;
1418
1419 static void one_remote_ref(const char *refname)
1420 {
1421 struct ref *ref;
1422 struct object *obj;
1423
1424 ref = alloc_ref(refname);
1425
1426 if (http_fetch_ref(repo->url, ref) != 0) {
1427 fprintf(stderr,
1428 "Unable to fetch ref %s from %s\n",
1429 refname, repo->url);
1430 free(ref);
1431 return;
1432 }
1433
1434 /*
1435 * Fetch a copy of the object if it doesn't exist locally - it
1436 * may be required for updating server info later.
1437 */
1438 if (repo->can_update_info_refs && !repo_has_object_file(the_repository, &ref->old_oid)) {
1439 obj = lookup_unknown_object(the_repository, &ref->old_oid);
1440 fprintf(stderr, " fetch %s for %s\n",
1441 oid_to_hex(&ref->old_oid), refname);
1442 add_fetch_request(obj);
1443 }
1444
1445 ref->next = remote_refs;
1446 remote_refs = ref;
1447 }
1448
1449 static void get_dav_remote_heads(void)
1450 {
1451 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1452 }
1453
1454 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1455 {
1456 struct strbuf *buf = (struct strbuf *)ls->userData;
1457 struct object *o;
1458 struct ref *ref;
1459
1460 ref = alloc_ref(ls->dentry_name);
1461
1462 if (http_fetch_ref(repo->url, ref) != 0) {
1463 fprintf(stderr,
1464 "Unable to fetch ref %s from %s\n",
1465 ls->dentry_name, repo->url);
1466 aborted = 1;
1467 free(ref);
1468 return;
1469 }
1470
1471 o = parse_object(the_repository, &ref->old_oid);
1472 if (!o) {
1473 fprintf(stderr,
1474 "Unable to parse object %s for remote ref %s\n",
1475 oid_to_hex(&ref->old_oid), ls->dentry_name);
1476 aborted = 1;
1477 free(ref);
1478 return;
1479 }
1480
1481 strbuf_addf(buf, "%s\t%s\n",
1482 oid_to_hex(&ref->old_oid), ls->dentry_name);
1483
1484 if (o->type == OBJ_TAG) {
1485 o = deref_tag(the_repository, o, ls->dentry_name, 0);
1486 if (o)
1487 strbuf_addf(buf, "%s\t%s^{}\n",
1488 oid_to_hex(&o->oid), ls->dentry_name);
1489 }
1490 free(ref);
1491 }
1492
1493 static void update_remote_info_refs(struct remote_lock *lock)
1494 {
1495 struct buffer buffer = { STRBUF_INIT, 0 };
1496 struct active_request_slot *slot;
1497 struct slot_results results;
1498 struct curl_slist *dav_headers;
1499
1500 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1501 add_remote_info_ref, &buffer.buf);
1502 if (!aborted) {
1503 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1504
1505 slot = get_active_slot();
1506 slot->results = &results;
1507 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1508 &buffer, fwrite_null);
1509 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1510
1511 if (start_active_slot(slot)) {
1512 run_active_slot(slot);
1513 if (results.curl_result != CURLE_OK) {
1514 fprintf(stderr,
1515 "PUT error: curl result=%d, HTTP code=%ld\n",
1516 results.curl_result, results.http_code);
1517 }
1518 }
1519 }
1520 strbuf_release(&buffer.buf);
1521 }
1522
1523 static int remote_exists(const char *path)
1524 {
1525 char *url = xstrfmt("%s%s", repo->url, path);
1526 int ret;
1527
1528
1529 switch (http_get_strbuf(url, NULL, NULL)) {
1530 case HTTP_OK:
1531 ret = 1;
1532 break;
1533 case HTTP_MISSING_TARGET:
1534 ret = 0;
1535 break;
1536 case HTTP_ERROR:
1537 error("unable to access '%s': %s", url, curl_errorstr);
1538 /* fallthrough */
1539 default:
1540 ret = -1;
1541 }
1542 free(url);
1543 return ret;
1544 }
1545
1546 static void fetch_symref(const char *path, char **symref, struct object_id *oid)
1547 {
1548 char *url = xstrfmt("%s%s", repo->url, path);
1549 struct strbuf buffer = STRBUF_INIT;
1550 const char *name;
1551
1552 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1553 die("Couldn't get %s for remote symref\n%s", url,
1554 curl_errorstr);
1555 free(url);
1556
1557 FREE_AND_NULL(*symref);
1558 oidclr(oid, the_repository->hash_algo);
1559
1560 if (buffer.len == 0)
1561 return;
1562
1563 /* Cut off trailing newline. */
1564 strbuf_rtrim(&buffer);
1565
1566 /* If it's a symref, set the refname; otherwise try for a sha1 */
1567 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1568 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1569 } else {
1570 get_oid_hex(buffer.buf, oid);
1571 }
1572
1573 strbuf_release(&buffer);
1574 }
1575
1576 static int verify_merge_base(struct object_id *head_oid, struct ref *remote)
1577 {
1578 struct commit *head = lookup_commit_or_die(head_oid, "HEAD");
1579 struct commit *branch = lookup_commit_or_die(&remote->old_oid,
1580 remote->name);
1581 int ret = repo_in_merge_bases(the_repository, branch, head);
1582
1583 if (ret < 0)
1584 exit(128);
1585 return ret;
1586 }
1587
1588 static int delete_remote_branch(const char *pattern, int force)
1589 {
1590 struct ref *refs = remote_refs;
1591 struct ref *remote_ref = NULL;
1592 struct object_id head_oid;
1593 char *symref = NULL;
1594 int match;
1595 int patlen = strlen(pattern);
1596 int i;
1597 struct active_request_slot *slot;
1598 struct slot_results results;
1599 char *url;
1600
1601 /* Find the remote branch(es) matching the specified branch name */
1602 for (match = 0; refs; refs = refs->next) {
1603 char *name = refs->name;
1604 int namelen = strlen(name);
1605 if (namelen < patlen ||
1606 memcmp(name + namelen - patlen, pattern, patlen))
1607 continue;
1608 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1609 continue;
1610 match++;
1611 remote_ref = refs;
1612 }
1613 if (match == 0)
1614 return error("No remote branch matches %s", pattern);
1615 if (match != 1)
1616 return error("More than one remote branch matches %s",
1617 pattern);
1618
1619 /*
1620 * Remote HEAD must be a symref (not exactly foolproof; a remote
1621 * symlink to a symref will look like a symref)
1622 */
1623 fetch_symref("HEAD", &symref, &head_oid);
1624 if (!symref)
1625 return error("Remote HEAD is not a symref");
1626
1627 /* Remote branch must not be the remote HEAD */
1628 for (i = 0; symref && i < MAXDEPTH; i++) {
1629 if (!strcmp(remote_ref->name, symref))
1630 return error("Remote branch %s is the current HEAD",
1631 remote_ref->name);
1632 fetch_symref(symref, &symref, &head_oid);
1633 }
1634
1635 /* Run extra sanity checks if delete is not forced */
1636 if (!force) {
1637 /* Remote HEAD must resolve to a known object */
1638 if (symref)
1639 return error("Remote HEAD symrefs too deep");
1640 if (is_null_oid(&head_oid))
1641 return error("Unable to resolve remote HEAD");
1642 if (!repo_has_object_file(the_repository, &head_oid))
1643 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", oid_to_hex(&head_oid));
1644
1645 /* Remote branch must resolve to a known object */
1646 if (is_null_oid(&remote_ref->old_oid))
1647 return error("Unable to resolve remote branch %s",
1648 remote_ref->name);
1649 if (!repo_has_object_file(the_repository, &remote_ref->old_oid))
1650 return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, oid_to_hex(&remote_ref->old_oid));
1651
1652 /* Remote branch must be an ancestor of remote HEAD */
1653 if (!verify_merge_base(&head_oid, remote_ref)) {
1654 return error("The branch '%s' is not an ancestor "
1655 "of your current HEAD.\n"
1656 "If you are sure you want to delete it,"
1657 " run:\n\t'git http-push -D %s %s'",
1658 remote_ref->name, repo->url, pattern);
1659 }
1660 }
1661
1662 /* Send delete request */
1663 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1664 if (dry_run)
1665 return 0;
1666 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1667 slot = get_active_slot();
1668 slot->results = &results;
1669 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1670 if (start_active_slot(slot)) {
1671 run_active_slot(slot);
1672 free(url);
1673 if (results.curl_result != CURLE_OK)
1674 return error("DELETE request failed (%d/%ld)",
1675 results.curl_result, results.http_code);
1676 } else {
1677 free(url);
1678 return error("Unable to start DELETE request");
1679 }
1680
1681 return 0;
1682 }
1683
1684 static void run_request_queue(void)
1685 {
1686 is_running_queue = 1;
1687 fill_active_slots();
1688 add_fill_function(NULL, fill_active_slot);
1689 do {
1690 finish_all_active_slots();
1691 fill_active_slots();
1692 } while (request_queue_head && !aborted);
1693
1694 is_running_queue = 0;
1695 }
1696
1697 int cmd_main(int argc, const char **argv)
1698 {
1699 struct transfer_request *request;
1700 struct transfer_request *next_request;
1701 struct refspec rs = REFSPEC_INIT_PUSH;
1702 struct remote_lock *ref_lock = NULL;
1703 struct remote_lock *info_ref_lock = NULL;
1704 int delete_branch = 0;
1705 int force_delete = 0;
1706 int objects_to_send;
1707 int rc = 0;
1708 int i;
1709 int new_refs;
1710 struct ref *ref, *local_refs;
1711
1712 CALLOC_ARRAY(repo, 1);
1713
1714 argv++;
1715 for (i = 1; i < argc; i++, argv++) {
1716 const char *arg = *argv;
1717
1718 if (*arg == '-') {
1719 if (!strcmp(arg, "--all")) {
1720 push_all = MATCH_REFS_ALL;
1721 continue;
1722 }
1723 if (!strcmp(arg, "--force")) {
1724 force_all = 1;
1725 continue;
1726 }
1727 if (!strcmp(arg, "--dry-run")) {
1728 dry_run = 1;
1729 continue;
1730 }
1731 if (!strcmp(arg, "--helper-status")) {
1732 helper_status = 1;
1733 continue;
1734 }
1735 if (!strcmp(arg, "--verbose")) {
1736 push_verbosely = 1;
1737 http_is_verbose = 1;
1738 continue;
1739 }
1740 if (!strcmp(arg, "-d")) {
1741 delete_branch = 1;
1742 continue;
1743 }
1744 if (!strcmp(arg, "-D")) {
1745 delete_branch = 1;
1746 force_delete = 1;
1747 continue;
1748 }
1749 if (!strcmp(arg, "-h"))
1750 usage(http_push_usage);
1751 }
1752 if (!repo->url) {
1753 char *path = strstr(arg, "//");
1754 str_end_url_with_slash(arg, &repo->url);
1755 repo->path_len = strlen(repo->url);
1756 if (path) {
1757 repo->path = strchr(path+2, '/');
1758 if (repo->path)
1759 repo->path_len = strlen(repo->path);
1760 }
1761 continue;
1762 }
1763 refspec_appendn(&rs, argv, argc - i);
1764 break;
1765 }
1766
1767 if (!repo->url)
1768 usage(http_push_usage);
1769
1770 if (delete_branch && rs.nr != 1)
1771 die("You must specify only one branch name when deleting a remote branch");
1772
1773 setup_git_directory();
1774
1775 memset(remote_dir_exists, -1, 256);
1776
1777 http_init(NULL, repo->url, 1);
1778
1779 is_running_queue = 0;
1780
1781 /* Verify DAV compliance/lock support */
1782 if (!locking_available()) {
1783 rc = 1;
1784 goto cleanup;
1785 }
1786
1787 sigchain_push_common(remove_locks_on_signal);
1788
1789 /* Check whether the remote has server info files */
1790 repo->can_update_info_refs = 0;
1791 repo->has_info_refs = remote_exists("info/refs");
1792 repo->has_info_packs = remote_exists("objects/info/packs");
1793 if (repo->has_info_refs) {
1794 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1795 if (info_ref_lock)
1796 repo->can_update_info_refs = 1;
1797 else {
1798 error("cannot lock existing info/refs");
1799 rc = 1;
1800 goto cleanup;
1801 }
1802 }
1803 if (repo->has_info_packs)
1804 fetch_indices();
1805
1806 /* Get a list of all local and remote heads to validate refspecs */
1807 local_refs = get_local_heads();
1808 fprintf(stderr, "Fetching remote heads...\n");
1809 get_dav_remote_heads();
1810 run_request_queue();
1811
1812 /* Remove a remote branch if -d or -D was specified */
1813 if (delete_branch) {
1814 const char *branch = rs.items[i].src;
1815 if (delete_remote_branch(branch, force_delete) == -1) {
1816 fprintf(stderr, "Unable to delete remote branch %s\n",
1817 branch);
1818 if (helper_status)
1819 printf("error %s cannot remove\n", branch);
1820 }
1821 goto cleanup;
1822 }
1823
1824 /* match them up */
1825 if (match_push_refs(local_refs, &remote_refs, &rs, push_all)) {
1826 rc = -1;
1827 goto cleanup;
1828 }
1829 if (!remote_refs) {
1830 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1831 if (helper_status)
1832 printf("error null no match\n");
1833 rc = 0;
1834 goto cleanup;
1835 }
1836
1837 new_refs = 0;
1838 for (ref = remote_refs; ref; ref = ref->next) {
1839 struct rev_info revs;
1840 struct strvec commit_argv = STRVEC_INIT;
1841
1842 if (!ref->peer_ref)
1843 continue;
1844
1845 if (is_null_oid(&ref->peer_ref->new_oid)) {
1846 if (delete_remote_branch(ref->name, 1) == -1) {
1847 error("Could not remove %s", ref->name);
1848 if (helper_status)
1849 printf("error %s cannot remove\n", ref->name);
1850 rc = -4;
1851 }
1852 else if (helper_status)
1853 printf("ok %s\n", ref->name);
1854 new_refs++;
1855 continue;
1856 }
1857
1858 if (oideq(&ref->old_oid, &ref->peer_ref->new_oid)) {
1859 if (push_verbosely)
1860 /* stable plumbing output; do not modify or localize */
1861 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1862 if (helper_status)
1863 printf("ok %s up to date\n", ref->name);
1864 continue;
1865 }
1866
1867 if (!force_all &&
1868 !is_null_oid(&ref->old_oid) &&
1869 !ref->force) {
1870 if (!repo_has_object_file(the_repository, &ref->old_oid) ||
1871 !ref_newer(&ref->peer_ref->new_oid,
1872 &ref->old_oid)) {
1873 /*
1874 * We do not have the remote ref, or
1875 * we know that the remote ref is not
1876 * an ancestor of what we are trying to
1877 * push. Either way this can be losing
1878 * commits at the remote end and likely
1879 * we were not up to date to begin with.
1880 */
1881 /* stable plumbing output; do not modify or localize */
1882 error("remote '%s' is not an ancestor of\n"
1883 "local '%s'.\n"
1884 "Maybe you are not up-to-date and "
1885 "need to pull first?",
1886 ref->name,
1887 ref->peer_ref->name);
1888 if (helper_status)
1889 printf("error %s non-fast forward\n", ref->name);
1890 rc = -2;
1891 continue;
1892 }
1893 }
1894 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1895 new_refs++;
1896
1897 fprintf(stderr, "updating '%s'", ref->name);
1898 if (strcmp(ref->name, ref->peer_ref->name))
1899 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1900 fprintf(stderr, "\n from %s\n to %s\n",
1901 oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
1902 if (dry_run) {
1903 if (helper_status)
1904 printf("ok %s\n", ref->name);
1905 continue;
1906 }
1907
1908 /* Lock remote branch ref */
1909 ref_lock = lock_remote(ref->name, LOCK_TIME);
1910 if (!ref_lock) {
1911 fprintf(stderr, "Unable to lock remote branch %s\n",
1912 ref->name);
1913 if (helper_status)
1914 printf("error %s lock error\n", ref->name);
1915 rc = 1;
1916 continue;
1917 }
1918
1919 /* Set up revision info for this refspec */
1920 strvec_push(&commit_argv, ""); /* ignored */
1921 strvec_push(&commit_argv, "--objects");
1922 strvec_push(&commit_argv, oid_to_hex(&ref->new_oid));
1923 if (!push_all && !is_null_oid(&ref->old_oid))
1924 strvec_pushf(&commit_argv, "^%s",
1925 oid_to_hex(&ref->old_oid));
1926 repo_init_revisions(the_repository, &revs, setup_git_directory());
1927 setup_revisions(commit_argv.nr, commit_argv.v, &revs, NULL);
1928 revs.edge_hint = 0; /* just in case */
1929
1930 /* Generate a list of objects that need to be pushed */
1931 pushing = 0;
1932 if (prepare_revision_walk(&revs))
1933 die("revision walk setup failed");
1934 mark_edges_uninteresting(&revs, NULL, 0);
1935 objects_to_send = get_delta(&revs, ref_lock);
1936 finish_all_active_slots();
1937
1938 /* Push missing objects to remote, this would be a
1939 convenient time to pack them first if appropriate. */
1940 pushing = 1;
1941 if (objects_to_send)
1942 fprintf(stderr, " sending %d objects\n",
1943 objects_to_send);
1944
1945 run_request_queue();
1946
1947 /* Update the remote branch if all went well */
1948 if (aborted || !update_remote(&ref->new_oid, ref_lock))
1949 rc = 1;
1950
1951 if (!rc)
1952 fprintf(stderr, " done\n");
1953 if (helper_status)
1954 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1955 unlock_remote(ref_lock);
1956 check_locks();
1957 strvec_clear(&commit_argv);
1958 release_revisions(&revs);
1959 }
1960
1961 /* Update remote server info if appropriate */
1962 if (repo->has_info_refs && new_refs) {
1963 if (info_ref_lock && repo->can_update_info_refs) {
1964 fprintf(stderr, "Updating remote server info\n");
1965 if (!dry_run)
1966 update_remote_info_refs(info_ref_lock);
1967 } else {
1968 fprintf(stderr, "Unable to update server info\n");
1969 }
1970 }
1971
1972 cleanup:
1973 if (info_ref_lock)
1974 unlock_remote(info_ref_lock);
1975 free(repo);
1976
1977 http_cleanup();
1978
1979 request = request_queue_head;
1980 while (request != NULL) {
1981 next_request = request->next;
1982 release_request(request);
1983 request = next_request;
1984 }
1985
1986 return rc;
1987 }
The Best VCS Around