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Merge branch 'ah/diff-files-ours-theirs-doc'
[git.git] / http-push.c
blobf0e3108f716f8376ba924c4db1ea6f44b8bd60b9
1 #include "cache.h"
2 #include "commit.h"
3 #include "tag.h"
4 #include "blob.h"
5 #include "http.h"
6 #include "refs.h"
7 #include "diff.h"
8 #include "revision.h"
9 #include "exec_cmd.h"
10 #include "remote.h"
11 #include "list-objects.h"
12 #include "sigchain.h"
13 #include "argv-array.h"
14
15 #ifdef EXPAT_NEEDS_XMLPARSE_H
16 #include <xmlparse.h>
17 #else
18 #include <expat.h>
19 #endif
20
21 static const char http_push_usage[] =
22 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
23
24 #ifndef XML_STATUS_OK
25 enum XML_Status {
26 XML_STATUS_OK = 1,
27 XML_STATUS_ERROR = 0
28 };
29 #define XML_STATUS_OK 1
30 #define XML_STATUS_ERROR 0
31 #endif
32
33 #define PREV_BUF_SIZE 4096
34
35 /* DAV methods */
36 #define DAV_LOCK "LOCK"
37 #define DAV_MKCOL "MKCOL"
38 #define DAV_MOVE "MOVE"
39 #define DAV_PROPFIND "PROPFIND"
40 #define DAV_PUT "PUT"
41 #define DAV_UNLOCK "UNLOCK"
42 #define DAV_DELETE "DELETE"
43
44 /* DAV lock flags */
45 #define DAV_PROP_LOCKWR (1u << 0)
46 #define DAV_PROP_LOCKEX (1u << 1)
47 #define DAV_LOCK_OK (1u << 2)
48
49 /* DAV XML properties */
50 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
51 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
52 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
53 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
54 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
55 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
56 #define DAV_PROPFIND_RESP ".multistatus.response"
57 #define DAV_PROPFIND_NAME ".multistatus.response.href"
58 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
59
60 /* DAV request body templates */
61 #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>"
62 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
63 #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>"
64
65 #define LOCK_TIME 600
66 #define LOCK_REFRESH 30
67
68 /* Remember to update object flag allocation in object.h */
69 #define LOCAL (1u<<16)
70 #define REMOTE (1u<<17)
71 #define FETCHING (1u<<18)
72 #define PUSHING (1u<<19)
73
74 /* We allow "recursive" symbolic refs. Only within reason, though */
75 #define MAXDEPTH 5
76
77 static int pushing;
78 static int aborted;
79 static signed char remote_dir_exists[256];
80
81 static int push_verbosely;
82 static int push_all = MATCH_REFS_NONE;
83 static int force_all;
84 static int dry_run;
85 static int helper_status;
86
87 static struct object_list *objects;
88
89 struct repo {
90 char *url;
91 char *path;
92 int path_len;
93 int has_info_refs;
94 int can_update_info_refs;
95 int has_info_packs;
96 struct packed_git *packs;
97 struct remote_lock *locks;
98 };
99
100 static struct repo *repo;
101
102 enum transfer_state {
103 NEED_FETCH,
104 RUN_FETCH_LOOSE,
105 RUN_FETCH_PACKED,
106 NEED_PUSH,
107 RUN_MKCOL,
108 RUN_PUT,
109 RUN_MOVE,
110 ABORTED,
111 COMPLETE
112 };
113
114 struct transfer_request {
115 struct object *obj;
116 char *url;
117 char *dest;
118 struct remote_lock *lock;
119 struct curl_slist *headers;
120 struct buffer buffer;
121 enum transfer_state state;
122 CURLcode curl_result;
123 char errorstr[CURL_ERROR_SIZE];
124 long http_code;
125 void *userData;
126 struct active_request_slot *slot;
127 struct transfer_request *next;
128 };
129
130 static struct transfer_request *request_queue_head;
131
132 struct xml_ctx {
133 char *name;
134 int len;
135 char *cdata;
136 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
137 void *userData;
138 };
139
140 struct remote_lock {
141 char *url;
142 char *owner;
143 char *token;
144 char tmpfile_suffix[41];
145 time_t start_time;
146 long timeout;
147 int refreshing;
148 struct remote_lock *next;
149 };
150
151 /* Flags that control remote_ls processing */
152 #define PROCESS_FILES (1u << 0)
153 #define PROCESS_DIRS (1u << 1)
154 #define RECURSIVE (1u << 2)
155
156 /* Flags that remote_ls passes to callback functions */
157 #define IS_DIR (1u << 0)
158
159 struct remote_ls_ctx {
160 char *path;
161 void (*userFunc)(struct remote_ls_ctx *ls);
162 void *userData;
163 int flags;
164 char *dentry_name;
165 int dentry_flags;
166 struct remote_ls_ctx *parent;
167 };
168
169 /* get_dav_token_headers options */
170 enum dav_header_flag {
171 DAV_HEADER_IF = (1u << 0),
172 DAV_HEADER_LOCK = (1u << 1),
173 DAV_HEADER_TIMEOUT = (1u << 2)
174 };
175
176 static char *xml_entities(const char *s)
177 {
178 struct strbuf buf = STRBUF_INIT;
179 strbuf_addstr_xml_quoted(&buf, s);
180 return strbuf_detach(&buf, NULL);
181 }
182
183 static void curl_setup_http_get(CURL *curl, const char *url,
184 const char *custom_req)
185 {
186 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
187 curl_easy_setopt(curl, CURLOPT_URL, url);
188 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
189 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
190 }
191
192 static void curl_setup_http(CURL *curl, const char *url,
193 const char *custom_req, struct buffer *buffer,
194 curl_write_callback write_fn)
195 {
196 curl_easy_setopt(curl, CURLOPT_PUT, 1);
197 curl_easy_setopt(curl, CURLOPT_URL, url);
198 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
199 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
200 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
201 #ifndef NO_CURL_IOCTL
202 curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
203 curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
204 #endif
205 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
206 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
207 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
208 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
209 }
210
211 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
212 {
213 struct strbuf buf = STRBUF_INIT;
214 struct curl_slist *dav_headers = http_copy_default_headers();
215
216 if (options & DAV_HEADER_IF) {
217 strbuf_addf(&buf, "If: (<%s>)", lock->token);
218 dav_headers = curl_slist_append(dav_headers, buf.buf);
219 strbuf_reset(&buf);
220 }
221 if (options & DAV_HEADER_LOCK) {
222 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
223 dav_headers = curl_slist_append(dav_headers, buf.buf);
224 strbuf_reset(&buf);
225 }
226 if (options & DAV_HEADER_TIMEOUT) {
227 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
228 dav_headers = curl_slist_append(dav_headers, buf.buf);
229 strbuf_reset(&buf);
230 }
231 strbuf_release(&buf);
232
233 return dav_headers;
234 }
235
236 static void finish_request(struct transfer_request *request);
237 static void release_request(struct transfer_request *request);
238
239 static void process_response(void *callback_data)
240 {
241 struct transfer_request *request =
242 (struct transfer_request *)callback_data;
243
244 finish_request(request);
245 }
246
247 #ifdef USE_CURL_MULTI
248
249 static void start_fetch_loose(struct transfer_request *request)
250 {
251 struct active_request_slot *slot;
252 struct http_object_request *obj_req;
253
254 obj_req = new_http_object_request(repo->url, request->obj->oid.hash);
255 if (obj_req == NULL) {
256 request->state = ABORTED;
257 return;
258 }
259
260 slot = obj_req->slot;
261 slot->callback_func = process_response;
262 slot->callback_data = request;
263 request->slot = slot;
264 request->userData = obj_req;
265
266 /* Try to get the request started, abort the request on error */
267 request->state = RUN_FETCH_LOOSE;
268 if (!start_active_slot(slot)) {
269 fprintf(stderr, "Unable to start GET request\n");
270 repo->can_update_info_refs = 0;
271 release_http_object_request(obj_req);
272 release_request(request);
273 }
274 }
275
276 static void start_mkcol(struct transfer_request *request)
277 {
278 char *hex = oid_to_hex(&request->obj->oid);
279 struct active_request_slot *slot;
280
281 request->url = get_remote_object_url(repo->url, hex, 1);
282
283 slot = get_active_slot();
284 slot->callback_func = process_response;
285 slot->callback_data = request;
286 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
287 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
288
289 if (start_active_slot(slot)) {
290 request->slot = slot;
291 request->state = RUN_MKCOL;
292 } else {
293 request->state = ABORTED;
294 free(request->url);
295 request->url = NULL;
296 }
297 }
298 #endif
299
300 static void start_fetch_packed(struct transfer_request *request)
301 {
302 struct packed_git *target;
303
304 struct transfer_request *check_request = request_queue_head;
305 struct http_pack_request *preq;
306
307 target = find_sha1_pack(request->obj->oid.hash, repo->packs);
308 if (!target) {
309 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
310 repo->can_update_info_refs = 0;
311 release_request(request);
312 return;
313 }
314
315 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
316 fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
317
318 preq = new_http_pack_request(target, repo->url);
319 if (preq == NULL) {
320 repo->can_update_info_refs = 0;
321 return;
322 }
323 preq->lst = &repo->packs;
324
325 /* Make sure there isn't another open request for this pack */
326 while (check_request) {
327 if (check_request->state == RUN_FETCH_PACKED &&
328 !strcmp(check_request->url, preq->url)) {
329 release_http_pack_request(preq);
330 release_request(request);
331 return;
332 }
333 check_request = check_request->next;
334 }
335
336 preq->slot->callback_func = process_response;
337 preq->slot->callback_data = request;
338 request->slot = preq->slot;
339 request->userData = preq;
340
341 /* Try to get the request started, abort the request on error */
342 request->state = RUN_FETCH_PACKED;
343 if (!start_active_slot(preq->slot)) {
344 fprintf(stderr, "Unable to start GET request\n");
345 release_http_pack_request(preq);
346 repo->can_update_info_refs = 0;
347 release_request(request);
348 }
349 }
350
351 static void start_put(struct transfer_request *request)
352 {
353 char *hex = oid_to_hex(&request->obj->oid);
354 struct active_request_slot *slot;
355 struct strbuf buf = STRBUF_INIT;
356 enum object_type type;
357 char hdr[50];
358 void *unpacked;
359 unsigned long len;
360 int hdrlen;
361 ssize_t size;
362 git_zstream stream;
363
364 unpacked = read_sha1_file(request->obj->oid.hash, &type, &len);
365 hdrlen = xsnprintf(hdr, sizeof(hdr), "%s %lu", typename(type), len) + 1;
366
367 /* Set it up */
368 git_deflate_init(&stream, zlib_compression_level);
369 size = git_deflate_bound(&stream, len + hdrlen);
370 strbuf_init(&request->buffer.buf, size);
371 request->buffer.posn = 0;
372
373 /* Compress it */
374 stream.next_out = (unsigned char *)request->buffer.buf.buf;
375 stream.avail_out = size;
376
377 /* First header.. */
378 stream.next_in = (void *)hdr;
379 stream.avail_in = hdrlen;
380 while (git_deflate(&stream, 0) == Z_OK)
381 ; /* nothing */
382
383 /* Then the data itself.. */
384 stream.next_in = unpacked;
385 stream.avail_in = len;
386 while (git_deflate(&stream, Z_FINISH) == Z_OK)
387 ; /* nothing */
388 git_deflate_end(&stream);
389 free(unpacked);
390
391 request->buffer.buf.len = stream.total_out;
392
393 strbuf_addstr(&buf, "Destination: ");
394 append_remote_object_url(&buf, repo->url, hex, 0);
395 request->dest = strbuf_detach(&buf, NULL);
396
397 append_remote_object_url(&buf, repo->url, hex, 0);
398 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
399 request->url = strbuf_detach(&buf, NULL);
400
401 slot = get_active_slot();
402 slot->callback_func = process_response;
403 slot->callback_data = request;
404 curl_setup_http(slot->curl, request->url, DAV_PUT,
405 &request->buffer, fwrite_null);
406
407 if (start_active_slot(slot)) {
408 request->slot = slot;
409 request->state = RUN_PUT;
410 } else {
411 request->state = ABORTED;
412 free(request->url);
413 request->url = NULL;
414 }
415 }
416
417 static void start_move(struct transfer_request *request)
418 {
419 struct active_request_slot *slot;
420 struct curl_slist *dav_headers = http_copy_default_headers();
421
422 slot = get_active_slot();
423 slot->callback_func = process_response;
424 slot->callback_data = request;
425 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
426 dav_headers = curl_slist_append(dav_headers, request->dest);
427 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
428 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
429
430 if (start_active_slot(slot)) {
431 request->slot = slot;
432 request->state = RUN_MOVE;
433 } else {
434 request->state = ABORTED;
435 free(request->url);
436 request->url = NULL;
437 }
438 }
439
440 static int refresh_lock(struct remote_lock *lock)
441 {
442 struct active_request_slot *slot;
443 struct slot_results results;
444 struct curl_slist *dav_headers;
445 int rc = 0;
446
447 lock->refreshing = 1;
448
449 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
450
451 slot = get_active_slot();
452 slot->results = &results;
453 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
454 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
455
456 if (start_active_slot(slot)) {
457 run_active_slot(slot);
458 if (results.curl_result != CURLE_OK) {
459 fprintf(stderr, "LOCK HTTP error %ld\n",
460 results.http_code);
461 } else {
462 lock->start_time = time(NULL);
463 rc = 1;
464 }
465 }
466
467 lock->refreshing = 0;
468 curl_slist_free_all(dav_headers);
469
470 return rc;
471 }
472
473 static void check_locks(void)
474 {
475 struct remote_lock *lock = repo->locks;
476 time_t current_time = time(NULL);
477 int time_remaining;
478
479 while (lock) {
480 time_remaining = lock->start_time + lock->timeout -
481 current_time;
482 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
483 if (!refresh_lock(lock)) {
484 fprintf(stderr,
485 "Unable to refresh lock for %s\n",
486 lock->url);
487 aborted = 1;
488 return;
489 }
490 }
491 lock = lock->next;
492 }
493 }
494
495 static void release_request(struct transfer_request *request)
496 {
497 struct transfer_request *entry = request_queue_head;
498
499 if (request == request_queue_head) {
500 request_queue_head = request->next;
501 } else {
502 while (entry->next != NULL && entry->next != request)
503 entry = entry->next;
504 if (entry->next == request)
505 entry->next = entry->next->next;
506 }
507
508 free(request->url);
509 free(request);
510 }
511
512 static void finish_request(struct transfer_request *request)
513 {
514 struct http_pack_request *preq;
515 struct http_object_request *obj_req;
516
517 request->curl_result = request->slot->curl_result;
518 request->http_code = request->slot->http_code;
519 request->slot = NULL;
520
521 /* Keep locks active */
522 check_locks();
523
524 if (request->headers != NULL)
525 curl_slist_free_all(request->headers);
526
527 /* URL is reused for MOVE after PUT */
528 if (request->state != RUN_PUT) {
529 free(request->url);
530 request->url = NULL;
531 }
532
533 if (request->state == RUN_MKCOL) {
534 if (request->curl_result == CURLE_OK ||
535 request->http_code == 405) {
536 remote_dir_exists[request->obj->oid.hash[0]] = 1;
537 start_put(request);
538 } else {
539 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
540 oid_to_hex(&request->obj->oid),
541 request->curl_result, request->http_code);
542 request->state = ABORTED;
543 aborted = 1;
544 }
545 } else if (request->state == RUN_PUT) {
546 if (request->curl_result == CURLE_OK) {
547 start_move(request);
548 } else {
549 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
550 oid_to_hex(&request->obj->oid),
551 request->curl_result, request->http_code);
552 request->state = ABORTED;
553 aborted = 1;
554 }
555 } else if (request->state == RUN_MOVE) {
556 if (request->curl_result == CURLE_OK) {
557 if (push_verbosely)
558 fprintf(stderr, " sent %s\n",
559 oid_to_hex(&request->obj->oid));
560 request->obj->flags |= REMOTE;
561 release_request(request);
562 } else {
563 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
564 oid_to_hex(&request->obj->oid),
565 request->curl_result, request->http_code);
566 request->state = ABORTED;
567 aborted = 1;
568 }
569 } else if (request->state == RUN_FETCH_LOOSE) {
570 obj_req = (struct http_object_request *)request->userData;
571
572 if (finish_http_object_request(obj_req) == 0)
573 if (obj_req->rename == 0)
574 request->obj->flags |= (LOCAL | REMOTE);
575
576 /* Try fetching packed if necessary */
577 if (request->obj->flags & LOCAL) {
578 release_http_object_request(obj_req);
579 release_request(request);
580 } else
581 start_fetch_packed(request);
582
583 } else if (request->state == RUN_FETCH_PACKED) {
584 int fail = 1;
585 if (request->curl_result != CURLE_OK) {
586 fprintf(stderr, "Unable to get pack file %s\n%s",
587 request->url, curl_errorstr);
588 } else {
589 preq = (struct http_pack_request *)request->userData;
590
591 if (preq) {
592 if (finish_http_pack_request(preq) == 0)
593 fail = 0;
594 release_http_pack_request(preq);
595 }
596 }
597 if (fail)
598 repo->can_update_info_refs = 0;
599 release_request(request);
600 }
601 }
602
603 #ifdef USE_CURL_MULTI
604 static int is_running_queue;
605 static int fill_active_slot(void *unused)
606 {
607 struct transfer_request *request;
608
609 if (aborted || !is_running_queue)
610 return 0;
611
612 for (request = request_queue_head; request; request = request->next) {
613 if (request->state == NEED_FETCH) {
614 start_fetch_loose(request);
615 return 1;
616 } else if (pushing && request->state == NEED_PUSH) {
617 if (remote_dir_exists[request->obj->oid.hash[0]] == 1) {
618 start_put(request);
619 } else {
620 start_mkcol(request);
621 }
622 return 1;
623 }
624 }
625 return 0;
626 }
627 #endif
628
629 static void get_remote_object_list(unsigned char parent);
630
631 static void add_fetch_request(struct object *obj)
632 {
633 struct transfer_request *request;
634
635 check_locks();
636
637 /*
638 * Don't fetch the object if it's known to exist locally
639 * or is already in the request queue
640 */
641 if (remote_dir_exists[obj->oid.hash[0]] == -1)
642 get_remote_object_list(obj->oid.hash[0]);
643 if (obj->flags & (LOCAL | FETCHING))
644 return;
645
646 obj->flags |= FETCHING;
647 request = xmalloc(sizeof(*request));
648 request->obj = obj;
649 request->url = NULL;
650 request->lock = NULL;
651 request->headers = NULL;
652 request->state = NEED_FETCH;
653 request->next = request_queue_head;
654 request_queue_head = request;
655
656 #ifdef USE_CURL_MULTI
657 fill_active_slots();
658 step_active_slots();
659 #endif
660 }
661
662 static int add_send_request(struct object *obj, struct remote_lock *lock)
663 {
664 struct transfer_request *request;
665 struct packed_git *target;
666
667 /* Keep locks active */
668 check_locks();
669
670 /*
671 * Don't push the object if it's known to exist on the remote
672 * or is already in the request queue
673 */
674 if (remote_dir_exists[obj->oid.hash[0]] == -1)
675 get_remote_object_list(obj->oid.hash[0]);
676 if (obj->flags & (REMOTE | PUSHING))
677 return 0;
678 target = find_sha1_pack(obj->oid.hash, repo->packs);
679 if (target) {
680 obj->flags |= REMOTE;
681 return 0;
682 }
683
684 obj->flags |= PUSHING;
685 request = xmalloc(sizeof(*request));
686 request->obj = obj;
687 request->url = NULL;
688 request->lock = lock;
689 request->headers = NULL;
690 request->state = NEED_PUSH;
691 request->next = request_queue_head;
692 request_queue_head = request;
693
694 #ifdef USE_CURL_MULTI
695 fill_active_slots();
696 step_active_slots();
697 #endif
698
699 return 1;
700 }
701
702 static int fetch_indices(void)
703 {
704 int ret;
705
706 if (push_verbosely)
707 fprintf(stderr, "Getting pack list\n");
708
709 switch (http_get_info_packs(repo->url, &repo->packs)) {
710 case HTTP_OK:
711 case HTTP_MISSING_TARGET:
712 ret = 0;
713 break;
714 default:
715 ret = -1;
716 }
717
718 return ret;
719 }
720
721 static void one_remote_object(const unsigned char *sha1)
722 {
723 struct object *obj;
724
725 obj = lookup_object(sha1);
726 if (!obj)
727 obj = parse_object(sha1);
728
729 /* Ignore remote objects that don't exist locally */
730 if (!obj)
731 return;
732
733 obj->flags |= REMOTE;
734 if (!object_list_contains(objects, obj))
735 object_list_insert(obj, &objects);
736 }
737
738 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
739 {
740 int *lock_flags = (int *)ctx->userData;
741
742 if (tag_closed) {
743 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
744 if ((*lock_flags & DAV_PROP_LOCKEX) &&
745 (*lock_flags & DAV_PROP_LOCKWR)) {
746 *lock_flags |= DAV_LOCK_OK;
747 }
748 *lock_flags &= DAV_LOCK_OK;
749 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
750 *lock_flags |= DAV_PROP_LOCKWR;
751 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
752 *lock_flags |= DAV_PROP_LOCKEX;
753 }
754 }
755 }
756
757 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
758 {
759 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
760 git_SHA_CTX sha_ctx;
761 unsigned char lock_token_sha1[20];
762
763 if (tag_closed && ctx->cdata) {
764 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
765 lock->owner = xstrdup(ctx->cdata);
766 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
767 const char *arg;
768 if (skip_prefix(ctx->cdata, "Second-", &arg))
769 lock->timeout = strtol(arg, NULL, 10);
770 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
771 lock->token = xstrdup(ctx->cdata);
772
773 git_SHA1_Init(&sha_ctx);
774 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
775 git_SHA1_Final(lock_token_sha1, &sha_ctx);
776
777 lock->tmpfile_suffix[0] = '_';
778 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
779 }
780 }
781 }
782
783 static void one_remote_ref(const char *refname);
784
785 static void
786 xml_start_tag(void *userData, const char *name, const char **atts)
787 {
788 struct xml_ctx *ctx = (struct xml_ctx *)userData;
789 const char *c = strchr(name, ':');
790 int old_namelen, new_len;
791
792 if (c == NULL)
793 c = name;
794 else
795 c++;
796
797 old_namelen = strlen(ctx->name);
798 new_len = old_namelen + strlen(c) + 2;
799
800 if (new_len > ctx->len) {
801 ctx->name = xrealloc(ctx->name, new_len);
802 ctx->len = new_len;
803 }
804 xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
805
806 free(ctx->cdata);
807 ctx->cdata = NULL;
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 == NULL)
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_FILE, &in_buffer);
894
895 lock = xcalloc(1, sizeof(*lock));
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 }
923 } else {
924 fprintf(stderr, "Unable to start LOCK request\n");
925 }
926
927 curl_slist_free_all(dav_headers);
928 strbuf_release(&out_buffer.buf);
929 strbuf_release(&in_buffer);
930
931 if (lock->token == NULL || lock->timeout <= 0) {
932 free(lock->token);
933 free(lock->owner);
934 free(url);
935 free(lock);
936 lock = NULL;
937 } else {
938 lock->url = url;
939 lock->start_time = time(NULL);
940 lock->next = repo->locks;
941 repo->locks = lock;
942 }
943
944 return lock;
945 }
946
947 static int unlock_remote(struct remote_lock *lock)
948 {
949 struct active_request_slot *slot;
950 struct slot_results results;
951 struct remote_lock *prev = repo->locks;
952 struct curl_slist *dav_headers;
953 int rc = 0;
954
955 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
956
957 slot = get_active_slot();
958 slot->results = &results;
959 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
960 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
961
962 if (start_active_slot(slot)) {
963 run_active_slot(slot);
964 if (results.curl_result == CURLE_OK)
965 rc = 1;
966 else
967 fprintf(stderr, "UNLOCK HTTP error %ld\n",
968 results.http_code);
969 } else {
970 fprintf(stderr, "Unable to start UNLOCK request\n");
971 }
972
973 curl_slist_free_all(dav_headers);
974
975 if (repo->locks == lock) {
976 repo->locks = lock->next;
977 } else {
978 while (prev && prev->next != lock)
979 prev = prev->next;
980 if (prev)
981 prev->next = prev->next->next;
982 }
983
984 free(lock->owner);
985 free(lock->url);
986 free(lock->token);
987 free(lock);
988
989 return rc;
990 }
991
992 static void remove_locks(void)
993 {
994 struct remote_lock *lock = repo->locks;
995
996 fprintf(stderr, "Removing remote locks...\n");
997 while (lock) {
998 struct remote_lock *next = lock->next;
999 unlock_remote(lock);
1000 lock = next;
1001 }
1002 }
1003
1004 static void remove_locks_on_signal(int signo)
1005 {
1006 remove_locks();
1007 sigchain_pop(signo);
1008 raise(signo);
1009 }
1010
1011 static void remote_ls(const char *path, int flags,
1012 void (*userFunc)(struct remote_ls_ctx *ls),
1013 void *userData);
1014
1015 /* extract hex from sharded "xx/x{40}" filename */
1016 static int get_sha1_hex_from_objpath(const char *path, unsigned char *sha1)
1017 {
1018 char hex[40];
1019
1020 if (strlen(path) != 41)
1021 return -1;
1022
1023 memcpy(hex, path, 2);
1024 path += 2;
1025 path++; /* skip '/' */
1026 memcpy(hex, path, 38);
1027
1028 return get_sha1_hex(hex, sha1);
1029 }
1030
1031 static void process_ls_object(struct remote_ls_ctx *ls)
1032 {
1033 unsigned int *parent = (unsigned int *)ls->userData;
1034 const char *path = ls->dentry_name;
1035 unsigned char sha1[20];
1036
1037 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1038 remote_dir_exists[*parent] = 1;
1039 return;
1040 }
1041
1042 if (!skip_prefix(path, "objects/", &path) ||
1043 get_sha1_hex_from_objpath(path, sha1))
1044 return;
1045
1046 one_remote_object(sha1);
1047 }
1048
1049 static void process_ls_ref(struct remote_ls_ctx *ls)
1050 {
1051 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1052 fprintf(stderr, " %s\n", ls->dentry_name);
1053 return;
1054 }
1055
1056 if (!(ls->dentry_flags & IS_DIR))
1057 one_remote_ref(ls->dentry_name);
1058 }
1059
1060 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1061 {
1062 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1063
1064 if (tag_closed) {
1065 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1066 if (ls->dentry_flags & IS_DIR) {
1067
1068 /* ensure collection names end with slash */
1069 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1070
1071 if (ls->flags & PROCESS_DIRS) {
1072 ls->userFunc(ls);
1073 }
1074 if (strcmp(ls->dentry_name, ls->path) &&
1075 ls->flags & RECURSIVE) {
1076 remote_ls(ls->dentry_name,
1077 ls->flags,
1078 ls->userFunc,
1079 ls->userData);
1080 }
1081 } else if (ls->flags & PROCESS_FILES) {
1082 ls->userFunc(ls);
1083 }
1084 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1085 char *path = ctx->cdata;
1086 if (*ctx->cdata == 'h') {
1087 path = strstr(path, "//");
1088 if (path) {
1089 path = strchr(path+2, '/');
1090 }
1091 }
1092 if (path) {
1093 const char *url = repo->url;
1094 if (repo->path)
1095 url = repo->path;
1096 if (strncmp(path, url, repo->path_len))
1097 error("Parsed path '%s' does not match url: '%s'",
1098 path, url);
1099 else {
1100 path += repo->path_len;
1101 ls->dentry_name = xstrdup(path);
1102 }
1103 }
1104 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1105 ls->dentry_flags |= IS_DIR;
1106 }
1107 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1108 free(ls->dentry_name);
1109 ls->dentry_name = NULL;
1110 ls->dentry_flags = 0;
1111 }
1112 }
1113
1114 /*
1115 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1116 * should _only_ heed the information from that file, instead of trying to
1117 * determine the refs from the remote file system (badly: it does not even
1118 * know about packed-refs).
1119 */
1120 static void remote_ls(const char *path, int flags,
1121 void (*userFunc)(struct remote_ls_ctx *ls),
1122 void *userData)
1123 {
1124 char *url = xstrfmt("%s%s", repo->url, path);
1125 struct active_request_slot *slot;
1126 struct slot_results results;
1127 struct strbuf in_buffer = STRBUF_INIT;
1128 struct buffer out_buffer = { STRBUF_INIT, 0 };
1129 struct curl_slist *dav_headers = http_copy_default_headers();
1130 struct xml_ctx ctx;
1131 struct remote_ls_ctx ls;
1132
1133 ls.flags = flags;
1134 ls.path = xstrdup(path);
1135 ls.dentry_name = NULL;
1136 ls.dentry_flags = 0;
1137 ls.userData = userData;
1138 ls.userFunc = userFunc;
1139
1140 strbuf_addstr(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1141
1142 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1143 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1144
1145 slot = get_active_slot();
1146 slot->results = &results;
1147 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1148 &out_buffer, fwrite_buffer);
1149 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1150 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1151
1152 if (start_active_slot(slot)) {
1153 run_active_slot(slot);
1154 if (results.curl_result == CURLE_OK) {
1155 XML_Parser parser = XML_ParserCreate(NULL);
1156 enum XML_Status result;
1157 ctx.name = xcalloc(10, 1);
1158 ctx.len = 0;
1159 ctx.cdata = NULL;
1160 ctx.userFunc = handle_remote_ls_ctx;
1161 ctx.userData = &ls;
1162 XML_SetUserData(parser, &ctx);
1163 XML_SetElementHandler(parser, xml_start_tag,
1164 xml_end_tag);
1165 XML_SetCharacterDataHandler(parser, xml_cdata);
1166 result = XML_Parse(parser, in_buffer.buf,
1167 in_buffer.len, 1);
1168 free(ctx.name);
1169
1170 if (result != XML_STATUS_OK) {
1171 fprintf(stderr, "XML error: %s\n",
1172 XML_ErrorString(
1173 XML_GetErrorCode(parser)));
1174 }
1175 XML_ParserFree(parser);
1176 }
1177 } else {
1178 fprintf(stderr, "Unable to start PROPFIND request\n");
1179 }
1180
1181 free(ls.path);
1182 free(url);
1183 strbuf_release(&out_buffer.buf);
1184 strbuf_release(&in_buffer);
1185 curl_slist_free_all(dav_headers);
1186 }
1187
1188 static void get_remote_object_list(unsigned char parent)
1189 {
1190 char path[] = "objects/XX/";
1191 static const char hex[] = "0123456789abcdef";
1192 unsigned int val = parent;
1193
1194 path[8] = hex[val >> 4];
1195 path[9] = hex[val & 0xf];
1196 remote_dir_exists[val] = 0;
1197 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1198 process_ls_object, &val);
1199 }
1200
1201 static int locking_available(void)
1202 {
1203 struct active_request_slot *slot;
1204 struct slot_results results;
1205 struct strbuf in_buffer = STRBUF_INIT;
1206 struct buffer out_buffer = { STRBUF_INIT, 0 };
1207 struct curl_slist *dav_headers = http_copy_default_headers();
1208 struct xml_ctx ctx;
1209 int lock_flags = 0;
1210 char *escaped;
1211
1212 escaped = xml_entities(repo->url);
1213 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1214 free(escaped);
1215
1216 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1217 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1218
1219 slot = get_active_slot();
1220 slot->results = &results;
1221 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1222 &out_buffer, fwrite_buffer);
1223 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1224 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1225
1226 if (start_active_slot(slot)) {
1227 run_active_slot(slot);
1228 if (results.curl_result == CURLE_OK) {
1229 XML_Parser parser = XML_ParserCreate(NULL);
1230 enum XML_Status result;
1231 ctx.name = xcalloc(10, 1);
1232 ctx.len = 0;
1233 ctx.cdata = NULL;
1234 ctx.userFunc = handle_lockprop_ctx;
1235 ctx.userData = &lock_flags;
1236 XML_SetUserData(parser, &ctx);
1237 XML_SetElementHandler(parser, xml_start_tag,
1238 xml_end_tag);
1239 result = XML_Parse(parser, in_buffer.buf,
1240 in_buffer.len, 1);
1241 free(ctx.name);
1242
1243 if (result != XML_STATUS_OK) {
1244 fprintf(stderr, "XML error: %s\n",
1245 XML_ErrorString(
1246 XML_GetErrorCode(parser)));
1247 lock_flags = 0;
1248 }
1249 XML_ParserFree(parser);
1250 if (!lock_flags)
1251 error("no DAV locking support on %s",
1252 repo->url);
1253
1254 } else {
1255 error("Cannot access URL %s, return code %d",
1256 repo->url, results.curl_result);
1257 lock_flags = 0;
1258 }
1259 } else {
1260 error("Unable to start PROPFIND request on %s", repo->url);
1261 }
1262
1263 strbuf_release(&out_buffer.buf);
1264 strbuf_release(&in_buffer);
1265 curl_slist_free_all(dav_headers);
1266
1267 return lock_flags;
1268 }
1269
1270 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1271 {
1272 struct object_list *entry = xmalloc(sizeof(struct object_list));
1273 entry->item = obj;
1274 entry->next = *p;
1275 *p = entry;
1276 return &entry->next;
1277 }
1278
1279 static struct object_list **process_blob(struct blob *blob,
1280 struct object_list **p)
1281 {
1282 struct object *obj = &blob->object;
1283
1284 obj->flags |= LOCAL;
1285
1286 if (obj->flags & (UNINTERESTING | SEEN))
1287 return p;
1288
1289 obj->flags |= SEEN;
1290 return add_one_object(obj, p);
1291 }
1292
1293 static struct object_list **process_tree(struct tree *tree,
1294 struct object_list **p)
1295 {
1296 struct object *obj = &tree->object;
1297 struct tree_desc desc;
1298 struct name_entry entry;
1299
1300 obj->flags |= LOCAL;
1301
1302 if (obj->flags & (UNINTERESTING | SEEN))
1303 return p;
1304 if (parse_tree(tree) < 0)
1305 die("bad tree object %s", oid_to_hex(&obj->oid));
1306
1307 obj->flags |= SEEN;
1308 p = add_one_object(obj, p);
1309
1310 init_tree_desc(&desc, tree->buffer, tree->size);
1311
1312 while (tree_entry(&desc, &entry))
1313 switch (object_type(entry.mode)) {
1314 case OBJ_TREE:
1315 p = process_tree(lookup_tree(entry.oid->hash), p);
1316 break;
1317 case OBJ_BLOB:
1318 p = process_blob(lookup_blob(entry.oid->hash), p);
1319 break;
1320 default:
1321 /* Subproject commit - not in this repository */
1322 break;
1323 }
1324
1325 free_tree_buffer(tree);
1326 return p;
1327 }
1328
1329 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1330 {
1331 int i;
1332 struct commit *commit;
1333 struct object_list **p = &objects;
1334 int count = 0;
1335
1336 while ((commit = get_revision(revs)) != NULL) {
1337 p = process_tree(commit->tree, p);
1338 commit->object.flags |= LOCAL;
1339 if (!(commit->object.flags & UNINTERESTING))
1340 count += add_send_request(&commit->object, lock);
1341 }
1342
1343 for (i = 0; i < revs->pending.nr; i++) {
1344 struct object_array_entry *entry = revs->pending.objects + i;
1345 struct object *obj = entry->item;
1346 const char *name = entry->name;
1347
1348 if (obj->flags & (UNINTERESTING | SEEN))
1349 continue;
1350 if (obj->type == OBJ_TAG) {
1351 obj->flags |= SEEN;
1352 p = add_one_object(obj, p);
1353 continue;
1354 }
1355 if (obj->type == OBJ_TREE) {
1356 p = process_tree((struct tree *)obj, p);
1357 continue;
1358 }
1359 if (obj->type == OBJ_BLOB) {
1360 p = process_blob((struct blob *)obj, p);
1361 continue;
1362 }
1363 die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
1364 }
1365
1366 while (objects) {
1367 if (!(objects->item->flags & UNINTERESTING))
1368 count += add_send_request(objects->item, lock);
1369 objects = objects->next;
1370 }
1371
1372 return count;
1373 }
1374
1375 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1376 {
1377 struct active_request_slot *slot;
1378 struct slot_results results;
1379 struct buffer out_buffer = { STRBUF_INIT, 0 };
1380 struct curl_slist *dav_headers;
1381
1382 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1383
1384 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1385
1386 slot = get_active_slot();
1387 slot->results = &results;
1388 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1389 &out_buffer, fwrite_null);
1390 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1391
1392 if (start_active_slot(slot)) {
1393 run_active_slot(slot);
1394 strbuf_release(&out_buffer.buf);
1395 if (results.curl_result != CURLE_OK) {
1396 fprintf(stderr,
1397 "PUT error: curl result=%d, HTTP code=%ld\n",
1398 results.curl_result, results.http_code);
1399 /* We should attempt recovery? */
1400 return 0;
1401 }
1402 } else {
1403 strbuf_release(&out_buffer.buf);
1404 fprintf(stderr, "Unable to start PUT request\n");
1405 return 0;
1406 }
1407
1408 return 1;
1409 }
1410
1411 static struct ref *remote_refs;
1412
1413 static void one_remote_ref(const char *refname)
1414 {
1415 struct ref *ref;
1416 struct object *obj;
1417
1418 ref = alloc_ref(refname);
1419
1420 if (http_fetch_ref(repo->url, ref) != 0) {
1421 fprintf(stderr,
1422 "Unable to fetch ref %s from %s\n",
1423 refname, repo->url);
1424 free(ref);
1425 return;
1426 }
1427
1428 /*
1429 * Fetch a copy of the object if it doesn't exist locally - it
1430 * may be required for updating server info later.
1431 */
1432 if (repo->can_update_info_refs && !has_object_file(&ref->old_oid)) {
1433 obj = lookup_unknown_object(ref->old_oid.hash);
1434 fprintf(stderr, " fetch %s for %s\n",
1435 oid_to_hex(&ref->old_oid), refname);
1436 add_fetch_request(obj);
1437 }
1438
1439 ref->next = remote_refs;
1440 remote_refs = ref;
1441 }
1442
1443 static void get_dav_remote_heads(void)
1444 {
1445 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1446 }
1447
1448 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1449 {
1450 struct strbuf *buf = (struct strbuf *)ls->userData;
1451 struct object *o;
1452 struct ref *ref;
1453
1454 ref = alloc_ref(ls->dentry_name);
1455
1456 if (http_fetch_ref(repo->url, ref) != 0) {
1457 fprintf(stderr,
1458 "Unable to fetch ref %s from %s\n",
1459 ls->dentry_name, repo->url);
1460 aborted = 1;
1461 free(ref);
1462 return;
1463 }
1464
1465 o = parse_object(ref->old_oid.hash);
1466 if (!o) {
1467 fprintf(stderr,
1468 "Unable to parse object %s for remote ref %s\n",
1469 oid_to_hex(&ref->old_oid), ls->dentry_name);
1470 aborted = 1;
1471 free(ref);
1472 return;
1473 }
1474
1475 strbuf_addf(buf, "%s\t%s\n",
1476 oid_to_hex(&ref->old_oid), ls->dentry_name);
1477
1478 if (o->type == OBJ_TAG) {
1479 o = deref_tag(o, ls->dentry_name, 0);
1480 if (o)
1481 strbuf_addf(buf, "%s\t%s^{}\n",
1482 oid_to_hex(&o->oid), ls->dentry_name);
1483 }
1484 free(ref);
1485 }
1486
1487 static void update_remote_info_refs(struct remote_lock *lock)
1488 {
1489 struct buffer buffer = { STRBUF_INIT, 0 };
1490 struct active_request_slot *slot;
1491 struct slot_results results;
1492 struct curl_slist *dav_headers;
1493
1494 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1495 add_remote_info_ref, &buffer.buf);
1496 if (!aborted) {
1497 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1498
1499 slot = get_active_slot();
1500 slot->results = &results;
1501 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1502 &buffer, fwrite_null);
1503 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1504
1505 if (start_active_slot(slot)) {
1506 run_active_slot(slot);
1507 if (results.curl_result != CURLE_OK) {
1508 fprintf(stderr,
1509 "PUT error: curl result=%d, HTTP code=%ld\n",
1510 results.curl_result, results.http_code);
1511 }
1512 }
1513 }
1514 strbuf_release(&buffer.buf);
1515 }
1516
1517 static int remote_exists(const char *path)
1518 {
1519 char *url = xstrfmt("%s%s", repo->url, path);
1520 int ret;
1521
1522
1523 switch (http_get_strbuf(url, NULL, NULL)) {
1524 case HTTP_OK:
1525 ret = 1;
1526 break;
1527 case HTTP_MISSING_TARGET:
1528 ret = 0;
1529 break;
1530 case HTTP_ERROR:
1531 error("unable to access '%s': %s", url, curl_errorstr);
1532 default:
1533 ret = -1;
1534 }
1535 free(url);
1536 return ret;
1537 }
1538
1539 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1540 {
1541 char *url = xstrfmt("%s%s", repo->url, path);
1542 struct strbuf buffer = STRBUF_INIT;
1543 const char *name;
1544
1545 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1546 die("Couldn't get %s for remote symref\n%s", url,
1547 curl_errorstr);
1548 free(url);
1549
1550 free(*symref);
1551 *symref = NULL;
1552 hashclr(sha1);
1553
1554 if (buffer.len == 0)
1555 return;
1556
1557 /* Cut off trailing newline. */
1558 strbuf_rtrim(&buffer);
1559
1560 /* If it's a symref, set the refname; otherwise try for a sha1 */
1561 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1562 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1563 } else {
1564 get_sha1_hex(buffer.buf, sha1);
1565 }
1566
1567 strbuf_release(&buffer);
1568 }
1569
1570 static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
1571 {
1572 struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
1573 struct commit *branch = lookup_commit_or_die(remote->old_oid.hash, remote->name);
1574
1575 return in_merge_bases(branch, head);
1576 }
1577
1578 static int delete_remote_branch(const char *pattern, int force)
1579 {
1580 struct ref *refs = remote_refs;
1581 struct ref *remote_ref = NULL;
1582 unsigned char head_sha1[20];
1583 char *symref = NULL;
1584 int match;
1585 int patlen = strlen(pattern);
1586 int i;
1587 struct active_request_slot *slot;
1588 struct slot_results results;
1589 char *url;
1590
1591 /* Find the remote branch(es) matching the specified branch name */
1592 for (match = 0; refs; refs = refs->next) {
1593 char *name = refs->name;
1594 int namelen = strlen(name);
1595 if (namelen < patlen ||
1596 memcmp(name + namelen - patlen, pattern, patlen))
1597 continue;
1598 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1599 continue;
1600 match++;
1601 remote_ref = refs;
1602 }
1603 if (match == 0)
1604 return error("No remote branch matches %s", pattern);
1605 if (match != 1)
1606 return error("More than one remote branch matches %s",
1607 pattern);
1608
1609 /*
1610 * Remote HEAD must be a symref (not exactly foolproof; a remote
1611 * symlink to a symref will look like a symref)
1612 */
1613 fetch_symref("HEAD", &symref, head_sha1);
1614 if (!symref)
1615 return error("Remote HEAD is not a symref");
1616
1617 /* Remote branch must not be the remote HEAD */
1618 for (i = 0; symref && i < MAXDEPTH; i++) {
1619 if (!strcmp(remote_ref->name, symref))
1620 return error("Remote branch %s is the current HEAD",
1621 remote_ref->name);
1622 fetch_symref(symref, &symref, head_sha1);
1623 }
1624
1625 /* Run extra sanity checks if delete is not forced */
1626 if (!force) {
1627 /* Remote HEAD must resolve to a known object */
1628 if (symref)
1629 return error("Remote HEAD symrefs too deep");
1630 if (is_null_sha1(head_sha1))
1631 return error("Unable to resolve remote HEAD");
1632 if (!has_sha1_file(head_sha1))
1633 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
1634
1635 /* Remote branch must resolve to a known object */
1636 if (is_null_oid(&remote_ref->old_oid))
1637 return error("Unable to resolve remote branch %s",
1638 remote_ref->name);
1639 if (!has_object_file(&remote_ref->old_oid))
1640 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));
1641
1642 /* Remote branch must be an ancestor of remote HEAD */
1643 if (!verify_merge_base(head_sha1, remote_ref)) {
1644 return error("The branch '%s' is not an ancestor "
1645 "of your current HEAD.\n"
1646 "If you are sure you want to delete it,"
1647 " run:\n\t'git http-push -D %s %s'",
1648 remote_ref->name, repo->url, pattern);
1649 }
1650 }
1651
1652 /* Send delete request */
1653 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1654 if (dry_run)
1655 return 0;
1656 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1657 slot = get_active_slot();
1658 slot->results = &results;
1659 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1660 if (start_active_slot(slot)) {
1661 run_active_slot(slot);
1662 free(url);
1663 if (results.curl_result != CURLE_OK)
1664 return error("DELETE request failed (%d/%ld)",
1665 results.curl_result, results.http_code);
1666 } else {
1667 free(url);
1668 return error("Unable to start DELETE request");
1669 }
1670
1671 return 0;
1672 }
1673
1674 static void run_request_queue(void)
1675 {
1676 #ifdef USE_CURL_MULTI
1677 is_running_queue = 1;
1678 fill_active_slots();
1679 add_fill_function(NULL, fill_active_slot);
1680 #endif
1681 do {
1682 finish_all_active_slots();
1683 #ifdef USE_CURL_MULTI
1684 fill_active_slots();
1685 #endif
1686 } while (request_queue_head && !aborted);
1687
1688 #ifdef USE_CURL_MULTI
1689 is_running_queue = 0;
1690 #endif
1691 }
1692
1693 int cmd_main(int argc, const char **argv)
1694 {
1695 struct transfer_request *request;
1696 struct transfer_request *next_request;
1697 int nr_refspec = 0;
1698 const char **refspec = NULL;
1699 struct remote_lock *ref_lock = NULL;
1700 struct remote_lock *info_ref_lock = NULL;
1701 struct rev_info revs;
1702 int delete_branch = 0;
1703 int force_delete = 0;
1704 int objects_to_send;
1705 int rc = 0;
1706 int i;
1707 int new_refs;
1708 struct ref *ref, *local_refs;
1709
1710 repo = xcalloc(1, sizeof(*repo));
1711
1712 argv++;
1713 for (i = 1; i < argc; i++, argv++) {
1714 const char *arg = *argv;
1715
1716 if (*arg == '-') {
1717 if (!strcmp(arg, "--all")) {
1718 push_all = MATCH_REFS_ALL;
1719 continue;
1720 }
1721 if (!strcmp(arg, "--force")) {
1722 force_all = 1;
1723 continue;
1724 }
1725 if (!strcmp(arg, "--dry-run")) {
1726 dry_run = 1;
1727 continue;
1728 }
1729 if (!strcmp(arg, "--helper-status")) {
1730 helper_status = 1;
1731 continue;
1732 }
1733 if (!strcmp(arg, "--verbose")) {
1734 push_verbosely = 1;
1735 http_is_verbose = 1;
1736 continue;
1737 }
1738 if (!strcmp(arg, "-d")) {
1739 delete_branch = 1;
1740 continue;
1741 }
1742 if (!strcmp(arg, "-D")) {
1743 delete_branch = 1;
1744 force_delete = 1;
1745 continue;
1746 }
1747 if (!strcmp(arg, "-h"))
1748 usage(http_push_usage);
1749 }
1750 if (!repo->url) {
1751 char *path = strstr(arg, "//");
1752 str_end_url_with_slash(arg, &repo->url);
1753 repo->path_len = strlen(repo->url);
1754 if (path) {
1755 repo->path = strchr(path+2, '/');
1756 if (repo->path)
1757 repo->path_len = strlen(repo->path);
1758 }
1759 continue;
1760 }
1761 refspec = argv;
1762 nr_refspec = argc - i;
1763 break;
1764 }
1765
1766 #ifndef USE_CURL_MULTI
1767 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1768 #endif
1769
1770 if (!repo->url)
1771 usage(http_push_usage);
1772
1773 if (delete_branch && nr_refspec != 1)
1774 die("You must specify only one branch name when deleting a remote branch");
1775
1776 setup_git_directory();
1777
1778 memset(remote_dir_exists, -1, 256);
1779
1780 http_init(NULL, repo->url, 1);
1781
1782 #ifdef USE_CURL_MULTI
1783 is_running_queue = 0;
1784 #endif
1785
1786 /* Verify DAV compliance/lock support */
1787 if (!locking_available()) {
1788 rc = 1;
1789 goto cleanup;
1790 }
1791
1792 sigchain_push_common(remove_locks_on_signal);
1793
1794 /* Check whether the remote has server info files */
1795 repo->can_update_info_refs = 0;
1796 repo->has_info_refs = remote_exists("info/refs");
1797 repo->has_info_packs = remote_exists("objects/info/packs");
1798 if (repo->has_info_refs) {
1799 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1800 if (info_ref_lock)
1801 repo->can_update_info_refs = 1;
1802 else {
1803 error("cannot lock existing info/refs");
1804 rc = 1;
1805 goto cleanup;
1806 }
1807 }
1808 if (repo->has_info_packs)
1809 fetch_indices();
1810
1811 /* Get a list of all local and remote heads to validate refspecs */
1812 local_refs = get_local_heads();
1813 fprintf(stderr, "Fetching remote heads...\n");
1814 get_dav_remote_heads();
1815 run_request_queue();
1816
1817 /* Remove a remote branch if -d or -D was specified */
1818 if (delete_branch) {
1819 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1820 fprintf(stderr, "Unable to delete remote branch %s\n",
1821 refspec[0]);
1822 if (helper_status)
1823 printf("error %s cannot remove\n", refspec[0]);
1824 }
1825 goto cleanup;
1826 }
1827
1828 /* match them up */
1829 if (match_push_refs(local_refs, &remote_refs,
1830 nr_refspec, (const char **) refspec, push_all)) {
1831 rc = -1;
1832 goto cleanup;
1833 }
1834 if (!remote_refs) {
1835 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1836 if (helper_status)
1837 printf("error null no match\n");
1838 rc = 0;
1839 goto cleanup;
1840 }
1841
1842 new_refs = 0;
1843 for (ref = remote_refs; ref; ref = ref->next) {
1844 struct argv_array commit_argv = ARGV_ARRAY_INIT;
1845
1846 if (!ref->peer_ref)
1847 continue;
1848
1849 if (is_null_oid(&ref->peer_ref->new_oid)) {
1850 if (delete_remote_branch(ref->name, 1) == -1) {
1851 error("Could not remove %s", ref->name);
1852 if (helper_status)
1853 printf("error %s cannot remove\n", ref->name);
1854 rc = -4;
1855 }
1856 else if (helper_status)
1857 printf("ok %s\n", ref->name);
1858 new_refs++;
1859 continue;
1860 }
1861
1862 if (!oidcmp(&ref->old_oid, &ref->peer_ref->new_oid)) {
1863 if (push_verbosely)
1864 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1865 if (helper_status)
1866 printf("ok %s up to date\n", ref->name);
1867 continue;
1868 }
1869
1870 if (!force_all &&
1871 !is_null_oid(&ref->old_oid) &&
1872 !ref->force) {
1873 if (!has_object_file(&ref->old_oid) ||
1874 !ref_newer(&ref->peer_ref->new_oid,
1875 &ref->old_oid)) {
1876 /*
1877 * We do not have the remote ref, or
1878 * we know that the remote ref is not
1879 * an ancestor of what we are trying to
1880 * push. Either way this can be losing
1881 * commits at the remote end and likely
1882 * we were not up to date to begin with.
1883 */
1884 error("remote '%s' is not an ancestor of\n"
1885 "local '%s'.\n"
1886 "Maybe you are not up-to-date and "
1887 "need to pull first?",
1888 ref->name,
1889 ref->peer_ref->name);
1890 if (helper_status)
1891 printf("error %s non-fast forward\n", ref->name);
1892 rc = -2;
1893 continue;
1894 }
1895 }
1896 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1897 new_refs++;
1898
1899 fprintf(stderr, "updating '%s'", ref->name);
1900 if (strcmp(ref->name, ref->peer_ref->name))
1901 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1902 fprintf(stderr, "\n from %s\n to %s\n",
1903 oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
1904 if (dry_run) {
1905 if (helper_status)
1906 printf("ok %s\n", ref->name);
1907 continue;
1908 }
1909
1910 /* Lock remote branch ref */
1911 ref_lock = lock_remote(ref->name, LOCK_TIME);
1912 if (ref_lock == NULL) {
1913 fprintf(stderr, "Unable to lock remote branch %s\n",
1914 ref->name);
1915 if (helper_status)
1916 printf("error %s lock error\n", ref->name);
1917 rc = 1;
1918 continue;
1919 }
1920
1921 /* Set up revision info for this refspec */
1922 argv_array_push(&commit_argv, ""); /* ignored */
1923 argv_array_push(&commit_argv, "--objects");
1924 argv_array_push(&commit_argv, oid_to_hex(&ref->new_oid));
1925 if (!push_all && !is_null_oid(&ref->old_oid))
1926 argv_array_pushf(&commit_argv, "^%s",
1927 oid_to_hex(&ref->old_oid));
1928 init_revisions(&revs, setup_git_directory());
1929 setup_revisions(commit_argv.argc, commit_argv.argv, &revs, NULL);
1930 revs.edge_hint = 0; /* just in case */
1931
1932 /* Generate a list of objects that need to be pushed */
1933 pushing = 0;
1934 if (prepare_revision_walk(&revs))
1935 die("revision walk setup failed");
1936 mark_edges_uninteresting(&revs, NULL);
1937 objects_to_send = get_delta(&revs, ref_lock);
1938 finish_all_active_slots();
1939
1940 /* Push missing objects to remote, this would be a
1941 convenient time to pack them first if appropriate. */
1942 pushing = 1;
1943 if (objects_to_send)
1944 fprintf(stderr, " sending %d objects\n",
1945 objects_to_send);
1946
1947 run_request_queue();
1948
1949 /* Update the remote branch if all went well */
1950 if (aborted || !update_remote(ref->new_oid.hash, ref_lock))
1951 rc = 1;
1952
1953 if (!rc)
1954 fprintf(stderr, " done\n");
1955 if (helper_status)
1956 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1957 unlock_remote(ref_lock);
1958 check_locks();
1959 argv_array_clear(&commit_argv);
1960 }
1961
1962 /* Update remote server info if appropriate */
1963 if (repo->has_info_refs && new_refs) {
1964 if (info_ref_lock && repo->can_update_info_refs) {
1965 fprintf(stderr, "Updating remote server info\n");
1966 if (!dry_run)
1967 update_remote_info_refs(info_ref_lock);
1968 } else {
1969 fprintf(stderr, "Unable to update server info\n");
1970 }
1971 }
1972
1973 cleanup:
1974 if (info_ref_lock)
1975 unlock_remote(info_ref_lock);
1976 free(repo);
1977
1978 http_cleanup();
1979
1980 request = request_queue_head;
1981 while (request != NULL) {
1982 next_request = request->next;
1983 release_request(request);
1984 request = next_request;
1985 }
1986
1987 return rc;
1988 }
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