freshlybakedca.ke
Git fork
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-file.h"
23#include "odb.h"
24#include "commit-reach.h"
25
26#ifdef EXPAT_NEEDS_XMLPARSE_H
27#include <xmlparse.h>
28#else
29#include <expat.h>
30#endif
31
32static const char http_push_usage[] =
33"git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
34
35#ifndef XML_STATUS_OK
36enum XML_Status {
37 XML_STATUS_OK = 1,
38 XML_STATUS_ERROR = 0
39};
40#define XML_STATUS_OK 1
41#define XML_STATUS_ERROR 0
42#endif
43
44#define PREV_BUF_SIZE 4096
45
46/* DAV methods */
47#define DAV_LOCK "LOCK"
48#define DAV_MKCOL "MKCOL"
49#define DAV_MOVE "MOVE"
50#define DAV_PROPFIND "PROPFIND"
51#define DAV_PUT "PUT"
52#define DAV_UNLOCK "UNLOCK"
53#define DAV_DELETE "DELETE"
54
55/* DAV lock flags */
56#define DAV_PROP_LOCKWR (1u << 0)
57#define DAV_PROP_LOCKEX (1u << 1)
58#define DAV_LOCK_OK (1u << 2)
59
60/* DAV XML properties */
61#define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
62#define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
63#define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
64#define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
65#define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
66#define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
67#define DAV_PROPFIND_RESP ".multistatus.response"
68#define DAV_PROPFIND_NAME ".multistatus.response.href"
69#define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
70
71/* DAV request body templates */
72#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>"
73#define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
74#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>"
75
76#define LOCK_TIME 600
77#define LOCK_REFRESH 30
78
79/* Remember to update object flag allocation in object.h */
80#define LOCAL (1u<<11)
81#define REMOTE (1u<<12)
82#define FETCHING (1u<<13)
83#define PUSHING (1u<<14)
84
85/* We allow "recursive" symbolic refs. Only within reason, though */
86#define MAXDEPTH 5
87
88static int pushing;
89static int aborted;
90static signed char remote_dir_exists[256];
91
92static int push_verbosely;
93static int push_all = MATCH_REFS_NONE;
94static int force_all;
95static int dry_run;
96static int helper_status;
97
98static struct object_list *objects;
99
100struct repo {
101 char *url;
102 char *path;
103 int path_len;
104 int has_info_refs;
105 int can_update_info_refs;
106 int has_info_packs;
107 struct packed_git *packs;
108 struct remote_lock *locks;
109};
110
111static struct repo *repo;
112
113enum transfer_state {
114 NEED_FETCH,
115 RUN_FETCH_LOOSE,
116 RUN_FETCH_PACKED,
117 NEED_PUSH,
118 RUN_MKCOL,
119 RUN_PUT,
120 RUN_MOVE,
121 ABORTED,
122 COMPLETE
123};
124
125struct transfer_request {
126 struct object *obj;
127 struct packed_git *target;
128 char *url;
129 char *dest;
130 struct remote_lock *lock;
131 struct curl_slist *headers;
132 struct buffer buffer;
133 enum transfer_state state;
134 CURLcode curl_result;
135 char errorstr[CURL_ERROR_SIZE];
136 long http_code;
137 void *userData;
138 struct active_request_slot *slot;
139 struct transfer_request *next;
140};
141
142static struct transfer_request *request_queue_head;
143
144struct xml_ctx {
145 char *name;
146 int len;
147 char *cdata;
148 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
149 void *userData;
150};
151
152struct remote_lock {
153 char *url;
154 char *owner;
155 char *token;
156 char tmpfile_suffix[GIT_MAX_HEXSZ + 1];
157 time_t start_time;
158 long timeout;
159 int refreshing;
160 struct remote_lock *next;
161};
162
163/* Flags that control remote_ls processing */
164#define PROCESS_FILES (1u << 0)
165#define PROCESS_DIRS (1u << 1)
166#define RECURSIVE (1u << 2)
167
168/* Flags that remote_ls passes to callback functions */
169#define IS_DIR (1u << 0)
170
171struct remote_ls_ctx {
172 char *path;
173 void (*userFunc)(struct remote_ls_ctx *ls);
174 void *userData;
175 int flags;
176 char *dentry_name;
177 int dentry_flags;
178 struct remote_ls_ctx *parent;
179};
180
181/* get_dav_token_headers options */
182enum dav_header_flag {
183 DAV_HEADER_IF = (1u << 0),
184 DAV_HEADER_LOCK = (1u << 1),
185 DAV_HEADER_TIMEOUT = (1u << 2)
186};
187
188static char *xml_entities(const char *s)
189{
190 struct strbuf buf = STRBUF_INIT;
191 strbuf_addstr_xml_quoted(&buf, s);
192 return strbuf_detach(&buf, NULL);
193}
194
195static void curl_setup_http_get(CURL *curl, const char *url,
196 const char *custom_req)
197{
198 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1L);
199 curl_easy_setopt(curl, CURLOPT_URL, url);
200 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
201 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
202}
203
204static void curl_setup_http(CURL *curl, const char *url,
205 const char *custom_req, struct buffer *buffer,
206 curl_write_callback write_fn)
207{
208 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
209 curl_easy_setopt(curl, CURLOPT_URL, url);
210 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
211 curl_easy_setopt(curl, CURLOPT_INFILESIZE_LARGE,
212 cast_size_t_to_curl_off_t(buffer->buf.len));
213 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
214 curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
215 curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
216 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
217 curl_easy_setopt(curl, CURLOPT_NOBODY, 0L);
218 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
219 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1L);
220}
221
222static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
223{
224 struct strbuf buf = STRBUF_INIT;
225 struct curl_slist *dav_headers = http_copy_default_headers();
226
227 if (options & DAV_HEADER_IF) {
228 strbuf_addf(&buf, "If: (<%s>)", lock->token);
229 dav_headers = curl_slist_append(dav_headers, buf.buf);
230 strbuf_reset(&buf);
231 }
232 if (options & DAV_HEADER_LOCK) {
233 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
234 dav_headers = curl_slist_append(dav_headers, buf.buf);
235 strbuf_reset(&buf);
236 }
237 if (options & DAV_HEADER_TIMEOUT) {
238 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
239 dav_headers = curl_slist_append(dav_headers, buf.buf);
240 strbuf_reset(&buf);
241 }
242 strbuf_release(&buf);
243
244 return dav_headers;
245}
246
247static void finish_request(struct transfer_request *request);
248static void release_request(struct transfer_request *request);
249
250static void process_response(void *callback_data)
251{
252 struct transfer_request *request =
253 (struct transfer_request *)callback_data;
254
255 finish_request(request);
256}
257
258static void start_fetch_loose(struct transfer_request *request)
259{
260 struct active_request_slot *slot;
261 struct http_object_request *obj_req;
262
263 obj_req = new_http_object_request(repo->url, &request->obj->oid);
264 if (!obj_req) {
265 request->state = ABORTED;
266 return;
267 }
268
269 slot = obj_req->slot;
270 slot->callback_func = process_response;
271 slot->callback_data = request;
272 request->slot = slot;
273 request->userData = obj_req;
274
275 /* Try to get the request started, abort the request on error */
276 request->state = RUN_FETCH_LOOSE;
277 if (!start_active_slot(slot)) {
278 fprintf(stderr, "Unable to start GET request\n");
279 repo->can_update_info_refs = 0;
280 release_http_object_request(&obj_req);
281 release_request(request);
282 }
283}
284
285static void start_mkcol(struct transfer_request *request)
286{
287 char *hex = oid_to_hex(&request->obj->oid);
288 struct active_request_slot *slot;
289
290 request->url = get_remote_object_url(repo->url, hex, 1);
291
292 slot = get_active_slot();
293 slot->callback_func = process_response;
294 slot->callback_data = request;
295 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
296 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
297
298 if (start_active_slot(slot)) {
299 request->slot = slot;
300 request->state = RUN_MKCOL;
301 } else {
302 request->state = ABORTED;
303 FREE_AND_NULL(request->url);
304 }
305}
306
307static void start_fetch_packed(struct transfer_request *request)
308{
309 struct packed_git *target;
310
311 struct transfer_request *check_request = request_queue_head;
312 struct http_pack_request *preq;
313
314 target = find_oid_pack(&request->obj->oid, repo->packs);
315 if (!target) {
316 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
317 repo->can_update_info_refs = 0;
318 release_request(request);
319 return;
320 }
321 close_pack_index(target);
322 request->target = target;
323
324 fprintf(stderr, "Fetching pack %s\n",
325 hash_to_hex(target->hash));
326 fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
327
328 preq = new_http_pack_request(target->hash, repo->url);
329 if (!preq) {
330 repo->can_update_info_refs = 0;
331 return;
332 }
333
334 /* Make sure there isn't another open request for this pack */
335 while (check_request) {
336 if (check_request->state == RUN_FETCH_PACKED &&
337 !strcmp(check_request->url, preq->url)) {
338 release_http_pack_request(preq);
339 release_request(request);
340 return;
341 }
342 check_request = check_request->next;
343 }
344
345 preq->slot->callback_func = process_response;
346 preq->slot->callback_data = request;
347 request->slot = preq->slot;
348 request->userData = preq;
349
350 /* Try to get the request started, abort the request on error */
351 request->state = RUN_FETCH_PACKED;
352 if (!start_active_slot(preq->slot)) {
353 fprintf(stderr, "Unable to start GET request\n");
354 release_http_pack_request(preq);
355 repo->can_update_info_refs = 0;
356 release_request(request);
357 }
358}
359
360static void start_put(struct transfer_request *request)
361{
362 char *hex = oid_to_hex(&request->obj->oid);
363 struct active_request_slot *slot;
364 struct strbuf buf = STRBUF_INIT;
365 enum object_type type;
366 char hdr[50];
367 void *unpacked;
368 unsigned long len;
369 int hdrlen;
370 ssize_t size;
371 git_zstream stream;
372
373 unpacked = odb_read_object(the_repository->objects, &request->obj->oid,
374 &type, &len);
375 hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
376
377 /* Set it up */
378 git_deflate_init(&stream, zlib_compression_level);
379 size = git_deflate_bound(&stream, len + hdrlen);
380 strbuf_grow(&request->buffer.buf, size);
381 request->buffer.posn = 0;
382
383 /* Compress it */
384 stream.next_out = (unsigned char *)request->buffer.buf.buf;
385 stream.avail_out = size;
386
387 /* First header.. */
388 stream.next_in = (void *)hdr;
389 stream.avail_in = hdrlen;
390 while (git_deflate(&stream, 0) == Z_OK)
391 ; /* nothing */
392
393 /* Then the data itself.. */
394 stream.next_in = unpacked;
395 stream.avail_in = len;
396 while (git_deflate(&stream, Z_FINISH) == Z_OK)
397 ; /* nothing */
398 git_deflate_end(&stream);
399 free(unpacked);
400
401 request->buffer.buf.len = stream.total_out;
402
403 strbuf_addstr(&buf, "Destination: ");
404 append_remote_object_url(&buf, repo->url, hex, 0);
405 request->dest = strbuf_detach(&buf, NULL);
406
407 append_remote_object_url(&buf, repo->url, hex, 0);
408 strbuf_add(&buf, request->lock->tmpfile_suffix, the_hash_algo->hexsz + 1);
409 request->url = strbuf_detach(&buf, NULL);
410
411 slot = get_active_slot();
412 slot->callback_func = process_response;
413 slot->callback_data = request;
414 curl_setup_http(slot->curl, request->url, DAV_PUT,
415 &request->buffer, fwrite_null);
416
417 if (start_active_slot(slot)) {
418 request->slot = slot;
419 request->state = RUN_PUT;
420 } else {
421 request->state = ABORTED;
422 FREE_AND_NULL(request->url);
423 }
424}
425
426static void start_move(struct transfer_request *request)
427{
428 struct active_request_slot *slot;
429 struct curl_slist *dav_headers = http_copy_default_headers();
430
431 slot = get_active_slot();
432 slot->callback_func = process_response;
433 slot->callback_data = request;
434 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
435 dav_headers = curl_slist_append(dav_headers, request->dest);
436 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
437 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
438
439 if (start_active_slot(slot)) {
440 request->slot = slot;
441 request->state = RUN_MOVE;
442 request->headers = dav_headers;
443 } else {
444 request->state = ABORTED;
445 FREE_AND_NULL(request->url);
446 curl_slist_free_all(dav_headers);
447 }
448}
449
450static int refresh_lock(struct remote_lock *lock)
451{
452 struct active_request_slot *slot;
453 struct slot_results results;
454 struct curl_slist *dav_headers;
455 int rc = 0;
456
457 lock->refreshing = 1;
458
459 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
460
461 slot = get_active_slot();
462 slot->results = &results;
463 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
464 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
465
466 if (start_active_slot(slot)) {
467 run_active_slot(slot);
468 if (results.curl_result != CURLE_OK) {
469 fprintf(stderr, "LOCK HTTP error %ld\n",
470 results.http_code);
471 } else {
472 lock->start_time = time(NULL);
473 rc = 1;
474 }
475 }
476
477 lock->refreshing = 0;
478 curl_slist_free_all(dav_headers);
479
480 return rc;
481}
482
483static void check_locks(void)
484{
485 struct remote_lock *lock = repo->locks;
486 time_t current_time = time(NULL);
487 int time_remaining;
488
489 while (lock) {
490 time_remaining = lock->start_time + lock->timeout -
491 current_time;
492 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
493 if (!refresh_lock(lock)) {
494 fprintf(stderr,
495 "Unable to refresh lock for %s\n",
496 lock->url);
497 aborted = 1;
498 return;
499 }
500 }
501 lock = lock->next;
502 }
503}
504
505static void release_request(struct transfer_request *request)
506{
507 struct transfer_request *entry = request_queue_head;
508
509 if (request == request_queue_head) {
510 request_queue_head = request->next;
511 } else {
512 while (entry && entry->next != request)
513 entry = entry->next;
514 if (entry)
515 entry->next = request->next;
516 }
517
518 free(request->url);
519 free(request->dest);
520 strbuf_release(&request->buffer.buf);
521 free(request);
522}
523
524static void finish_request(struct transfer_request *request)
525{
526 struct http_pack_request *preq;
527 struct http_object_request *obj_req;
528
529 request->curl_result = request->slot->curl_result;
530 request->http_code = request->slot->http_code;
531 request->slot = NULL;
532
533 /* Keep locks active */
534 check_locks();
535
536 if (request->headers)
537 curl_slist_free_all(request->headers);
538
539 /* URL is reused for MOVE after PUT and used during FETCH */
540 if (request->state != RUN_PUT && request->state != RUN_FETCH_PACKED) {
541 FREE_AND_NULL(request->url);
542 }
543
544 if (request->state == RUN_MKCOL) {
545 if (request->curl_result == CURLE_OK ||
546 request->http_code == 405) {
547 remote_dir_exists[request->obj->oid.hash[0]] = 1;
548 start_put(request);
549 } else {
550 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
551 oid_to_hex(&request->obj->oid),
552 request->curl_result, request->http_code);
553 request->state = ABORTED;
554 aborted = 1;
555 }
556 } else if (request->state == RUN_PUT) {
557 if (request->curl_result == CURLE_OK) {
558 start_move(request);
559 } else {
560 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
561 oid_to_hex(&request->obj->oid),
562 request->curl_result, request->http_code);
563 request->state = ABORTED;
564 aborted = 1;
565 }
566 } else if (request->state == RUN_MOVE) {
567 if (request->curl_result == CURLE_OK) {
568 if (push_verbosely)
569 fprintf(stderr, " sent %s\n",
570 oid_to_hex(&request->obj->oid));
571 request->obj->flags |= REMOTE;
572 release_request(request);
573 } else {
574 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
575 oid_to_hex(&request->obj->oid),
576 request->curl_result, request->http_code);
577 request->state = ABORTED;
578 aborted = 1;
579 }
580 } else if (request->state == RUN_FETCH_LOOSE) {
581 obj_req = (struct http_object_request *)request->userData;
582
583 if (finish_http_object_request(obj_req) == 0)
584 if (obj_req->rename == 0)
585 request->obj->flags |= (LOCAL | REMOTE);
586
587 release_http_object_request(&obj_req);
588
589 /* Try fetching packed if necessary */
590 if (request->obj->flags & LOCAL) {
591 release_request(request);
592 } else
593 start_fetch_packed(request);
594
595 } else if (request->state == RUN_FETCH_PACKED) {
596 int fail = 1;
597 if (request->curl_result != CURLE_OK) {
598 fprintf(stderr, "Unable to get pack file %s\n%s",
599 request->url, curl_errorstr);
600 } else {
601 preq = (struct http_pack_request *)request->userData;
602
603 if (preq) {
604 if (finish_http_pack_request(preq) == 0)
605 fail = 0;
606 release_http_pack_request(preq);
607 }
608 }
609 if (fail)
610 repo->can_update_info_refs = 0;
611 else
612 http_install_packfile(request->target, &repo->packs);
613 release_request(request);
614 }
615}
616
617static int is_running_queue;
618static int fill_active_slot(void *data UNUSED)
619{
620 struct transfer_request *request;
621
622 if (aborted || !is_running_queue)
623 return 0;
624
625 for (request = request_queue_head; request; request = request->next) {
626 if (request->state == NEED_FETCH) {
627 start_fetch_loose(request);
628 return 1;
629 } else if (pushing && request->state == NEED_PUSH) {
630 if (remote_dir_exists[request->obj->oid.hash[0]] == 1) {
631 start_put(request);
632 } else {
633 start_mkcol(request);
634 }
635 return 1;
636 }
637 }
638 return 0;
639}
640
641static void get_remote_object_list(unsigned char parent);
642
643static void add_fetch_request(struct object *obj)
644{
645 struct transfer_request *request;
646
647 check_locks();
648
649 /*
650 * Don't fetch the object if it's known to exist locally
651 * or is already in the request queue
652 */
653 if (remote_dir_exists[obj->oid.hash[0]] == -1)
654 get_remote_object_list(obj->oid.hash[0]);
655 if (obj->flags & (LOCAL | FETCHING))
656 return;
657
658 obj->flags |= FETCHING;
659 CALLOC_ARRAY(request, 1);
660 request->obj = obj;
661 request->state = NEED_FETCH;
662 strbuf_init(&request->buffer.buf, 0);
663 request->next = request_queue_head;
664 request_queue_head = request;
665
666 fill_active_slots();
667 step_active_slots();
668}
669
670static int add_send_request(struct object *obj, struct remote_lock *lock)
671{
672 struct transfer_request *request;
673 struct packed_git *target;
674
675 /* Keep locks active */
676 check_locks();
677
678 /*
679 * Don't push the object if it's known to exist on the remote
680 * or is already in the request queue
681 */
682 if (remote_dir_exists[obj->oid.hash[0]] == -1)
683 get_remote_object_list(obj->oid.hash[0]);
684 if (obj->flags & (REMOTE | PUSHING))
685 return 0;
686 target = find_oid_pack(&obj->oid, repo->packs);
687 if (target) {
688 obj->flags |= REMOTE;
689 return 0;
690 }
691
692 obj->flags |= PUSHING;
693 CALLOC_ARRAY(request, 1);
694 request->obj = obj;
695 request->lock = lock;
696 request->state = NEED_PUSH;
697 strbuf_init(&request->buffer.buf, 0);
698 request->next = request_queue_head;
699 request_queue_head = request;
700
701 fill_active_slots();
702 step_active_slots();
703
704 return 1;
705}
706
707static int fetch_indices(void)
708{
709 int ret;
710
711 if (push_verbosely)
712 fprintf(stderr, "Getting pack list\n");
713
714 switch (http_get_info_packs(repo->url, &repo->packs)) {
715 case HTTP_OK:
716 case HTTP_MISSING_TARGET:
717 ret = 0;
718 break;
719 default:
720 ret = -1;
721 }
722
723 return ret;
724}
725
726static void one_remote_object(const struct object_id *oid)
727{
728 struct object *obj;
729
730 obj = lookup_object(the_repository, oid);
731 if (!obj)
732 obj = parse_object(the_repository, oid);
733
734 /* Ignore remote objects that don't exist locally */
735 if (!obj)
736 return;
737
738 obj->flags |= REMOTE;
739 if (!object_list_contains(objects, obj))
740 object_list_insert(obj, &objects);
741}
742
743static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
744{
745 int *lock_flags = (int *)ctx->userData;
746
747 if (tag_closed) {
748 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
749 if ((*lock_flags & DAV_PROP_LOCKEX) &&
750 (*lock_flags & DAV_PROP_LOCKWR)) {
751 *lock_flags |= DAV_LOCK_OK;
752 }
753 *lock_flags &= DAV_LOCK_OK;
754 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
755 *lock_flags |= DAV_PROP_LOCKWR;
756 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
757 *lock_flags |= DAV_PROP_LOCKEX;
758 }
759 }
760}
761
762static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
763{
764 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
765 struct git_hash_ctx hash_ctx;
766 unsigned char lock_token_hash[GIT_MAX_RAWSZ];
767
768 if (tag_closed && ctx->cdata) {
769 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
770 lock->owner = xstrdup(ctx->cdata);
771 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
772 const char *arg;
773 if (skip_prefix(ctx->cdata, "Second-", &arg))
774 lock->timeout = strtol(arg, NULL, 10);
775 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
776 lock->token = xstrdup(ctx->cdata);
777
778 the_hash_algo->init_fn(&hash_ctx);
779 git_hash_update(&hash_ctx, lock->token, strlen(lock->token));
780 git_hash_final(lock_token_hash, &hash_ctx);
781
782 lock->tmpfile_suffix[0] = '_';
783 memcpy(lock->tmpfile_suffix + 1, hash_to_hex(lock_token_hash), the_hash_algo->hexsz);
784 }
785 }
786}
787
788static void one_remote_ref(const char *refname);
789
790static void
791xml_start_tag(void *userData, const char *name, const char **atts UNUSED)
792{
793 struct xml_ctx *ctx = (struct xml_ctx *)userData;
794 const char *c = strchr(name, ':');
795 int old_namelen, new_len;
796
797 if (!c)
798 c = name;
799 else
800 c++;
801
802 old_namelen = strlen(ctx->name);
803 new_len = old_namelen + strlen(c) + 2;
804
805 if (new_len > ctx->len) {
806 ctx->name = xrealloc(ctx->name, new_len);
807 ctx->len = new_len;
808 }
809 xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
810
811 FREE_AND_NULL(ctx->cdata);
812
813 ctx->userFunc(ctx, 0);
814}
815
816static void
817xml_end_tag(void *userData, const char *name)
818{
819 struct xml_ctx *ctx = (struct xml_ctx *)userData;
820 const char *c = strchr(name, ':');
821 char *ep;
822
823 ctx->userFunc(ctx, 1);
824
825 if (!c)
826 c = name;
827 else
828 c++;
829
830 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
831 *ep = 0;
832}
833
834static void
835xml_cdata(void *userData, const XML_Char *s, int len)
836{
837 struct xml_ctx *ctx = (struct xml_ctx *)userData;
838 free(ctx->cdata);
839 ctx->cdata = xmemdupz(s, len);
840}
841
842static struct remote_lock *lock_remote(const char *path, long timeout)
843{
844 struct active_request_slot *slot;
845 struct slot_results results;
846 struct buffer out_buffer = { STRBUF_INIT, 0 };
847 struct strbuf in_buffer = STRBUF_INIT;
848 char *url;
849 char *ep;
850 char timeout_header[25];
851 struct remote_lock *lock = NULL;
852 struct curl_slist *dav_headers = http_copy_default_headers();
853 struct xml_ctx ctx;
854 char *escaped;
855
856 url = xstrfmt("%s%s", repo->url, path);
857
858 /* Make sure leading directories exist for the remote ref */
859 ep = strchr(url + strlen(repo->url) + 1, '/');
860 while (ep) {
861 char saved_character = ep[1];
862 ep[1] = '\0';
863 slot = get_active_slot();
864 slot->results = &results;
865 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
866 if (start_active_slot(slot)) {
867 run_active_slot(slot);
868 if (results.curl_result != CURLE_OK &&
869 results.http_code != 405) {
870 fprintf(stderr,
871 "Unable to create branch path %s\n",
872 url);
873 free(url);
874 return NULL;
875 }
876 } else {
877 fprintf(stderr, "Unable to start MKCOL request\n");
878 free(url);
879 return NULL;
880 }
881 ep[1] = saved_character;
882 ep = strchr(ep + 1, '/');
883 }
884
885 escaped = xml_entities(ident_default_email());
886 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
887 free(escaped);
888
889 xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
890 dav_headers = curl_slist_append(dav_headers, timeout_header);
891 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
892
893 slot = get_active_slot();
894 slot->results = &results;
895 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
896 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
897 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
898
899 CALLOC_ARRAY(lock, 1);
900 lock->timeout = -1;
901
902 if (start_active_slot(slot)) {
903 run_active_slot(slot);
904 if (results.curl_result == CURLE_OK) {
905 XML_Parser parser = XML_ParserCreate(NULL);
906 enum XML_Status result;
907 ctx.name = xcalloc(10, 1);
908 ctx.len = 0;
909 ctx.cdata = NULL;
910 ctx.userFunc = handle_new_lock_ctx;
911 ctx.userData = lock;
912 XML_SetUserData(parser, &ctx);
913 XML_SetElementHandler(parser, xml_start_tag,
914 xml_end_tag);
915 XML_SetCharacterDataHandler(parser, xml_cdata);
916 result = XML_Parse(parser, in_buffer.buf,
917 in_buffer.len, 1);
918 free(ctx.name);
919 free(ctx.cdata);
920 if (result != XML_STATUS_OK) {
921 fprintf(stderr, "XML error: %s\n",
922 XML_ErrorString(
923 XML_GetErrorCode(parser)));
924 lock->timeout = -1;
925 }
926 XML_ParserFree(parser);
927 } else {
928 fprintf(stderr,
929 "error: curl result=%d, HTTP code=%ld\n",
930 results.curl_result, results.http_code);
931 }
932 } else {
933 fprintf(stderr, "Unable to start LOCK request\n");
934 }
935
936 curl_slist_free_all(dav_headers);
937 strbuf_release(&out_buffer.buf);
938 strbuf_release(&in_buffer);
939
940 if (lock->token == NULL || lock->timeout <= 0) {
941 free(lock->token);
942 free(lock->owner);
943 free(url);
944 FREE_AND_NULL(lock);
945 } else {
946 lock->url = url;
947 lock->start_time = time(NULL);
948 lock->next = repo->locks;
949 repo->locks = lock;
950 }
951
952 return lock;
953}
954
955static int unlock_remote(struct remote_lock *lock)
956{
957 struct active_request_slot *slot;
958 struct slot_results results;
959 struct remote_lock *prev = repo->locks;
960 struct curl_slist *dav_headers;
961 int rc = 0;
962
963 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
964
965 slot = get_active_slot();
966 slot->results = &results;
967 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
968 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
969
970 if (start_active_slot(slot)) {
971 run_active_slot(slot);
972 if (results.curl_result == CURLE_OK)
973 rc = 1;
974 else
975 fprintf(stderr, "UNLOCK HTTP error %ld\n",
976 results.http_code);
977 } else {
978 fprintf(stderr, "Unable to start UNLOCK request\n");
979 }
980
981 curl_slist_free_all(dav_headers);
982
983 if (repo->locks == lock) {
984 repo->locks = lock->next;
985 } else {
986 while (prev && prev->next != lock)
987 prev = prev->next;
988 if (prev)
989 prev->next = lock->next;
990 }
991
992 free(lock->owner);
993 free(lock->url);
994 free(lock->token);
995 free(lock);
996
997 return rc;
998}
999
1000static void remove_locks(void)
1001{
1002 struct remote_lock *lock = repo->locks;
1003
1004 fprintf(stderr, "Removing remote locks...\n");
1005 while (lock) {
1006 struct remote_lock *next = lock->next;
1007 unlock_remote(lock);
1008 lock = next;
1009 }
1010}
1011
1012static void remove_locks_on_signal(int signo)
1013{
1014 remove_locks();
1015 sigchain_pop(signo);
1016 raise(signo);
1017}
1018
1019static void remote_ls(const char *path, int flags,
1020 void (*userFunc)(struct remote_ls_ctx *ls),
1021 void *userData);
1022
1023/* extract hex from sharded "xx/x{38}" filename */
1024static int get_oid_hex_from_objpath(const char *path, struct object_id *oid)
1025{
1026 memset(oid->hash, 0, GIT_MAX_RAWSZ);
1027 oid->algo = hash_algo_by_ptr(the_hash_algo);
1028
1029 if (strlen(path) != the_hash_algo->hexsz + 1)
1030 return -1;
1031
1032 if (hex_to_bytes(oid->hash, path, 1))
1033 return -1;
1034 path += 2;
1035 path++; /* skip '/' */
1036
1037 return hex_to_bytes(oid->hash + 1, path, the_hash_algo->rawsz - 1);
1038}
1039
1040static void process_ls_object(struct remote_ls_ctx *ls)
1041{
1042 unsigned int *parent = (unsigned int *)ls->userData;
1043 const char *path = ls->dentry_name;
1044 struct object_id oid;
1045
1046 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1047 remote_dir_exists[*parent] = 1;
1048 return;
1049 }
1050
1051 if (!skip_prefix(path, "objects/", &path) ||
1052 get_oid_hex_from_objpath(path, &oid))
1053 return;
1054
1055 one_remote_object(&oid);
1056}
1057
1058static void process_ls_ref(struct remote_ls_ctx *ls)
1059{
1060 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1061 fprintf(stderr, " %s\n", ls->dentry_name);
1062 return;
1063 }
1064
1065 if (!(ls->dentry_flags & IS_DIR))
1066 one_remote_ref(ls->dentry_name);
1067}
1068
1069static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1070{
1071 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1072
1073 if (tag_closed) {
1074 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1075 if (ls->dentry_flags & IS_DIR) {
1076
1077 /* ensure collection names end with slash */
1078 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1079
1080 if (ls->flags & PROCESS_DIRS) {
1081 ls->userFunc(ls);
1082 }
1083 if (strcmp(ls->dentry_name, ls->path) &&
1084 ls->flags & RECURSIVE) {
1085 remote_ls(ls->dentry_name,
1086 ls->flags,
1087 ls->userFunc,
1088 ls->userData);
1089 }
1090 } else if (ls->flags & PROCESS_FILES) {
1091 ls->userFunc(ls);
1092 }
1093 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1094 char *path = ctx->cdata;
1095 if (*ctx->cdata == 'h') {
1096 path = strstr(path, "//");
1097 if (path) {
1098 path = strchr(path+2, '/');
1099 }
1100 }
1101 if (path) {
1102 const char *url = repo->url;
1103 if (repo->path)
1104 url = repo->path;
1105 if (strncmp(path, url, repo->path_len))
1106 error("Parsed path '%s' does not match url: '%s'",
1107 path, url);
1108 else {
1109 path += repo->path_len;
1110 ls->dentry_name = xstrdup(path);
1111 }
1112 }
1113 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1114 ls->dentry_flags |= IS_DIR;
1115 }
1116 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1117 FREE_AND_NULL(ls->dentry_name);
1118 ls->dentry_flags = 0;
1119 }
1120}
1121
1122/*
1123 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1124 * should _only_ heed the information from that file, instead of trying to
1125 * determine the refs from the remote file system (badly: it does not even
1126 * know about packed-refs).
1127 */
1128static void remote_ls(const char *path, int flags,
1129 void (*userFunc)(struct remote_ls_ctx *ls),
1130 void *userData)
1131{
1132 char *url = xstrfmt("%s%s", repo->url, path);
1133 struct active_request_slot *slot;
1134 struct slot_results results;
1135 struct strbuf in_buffer = STRBUF_INIT;
1136 struct buffer out_buffer = { STRBUF_INIT, 0 };
1137 struct curl_slist *dav_headers = http_copy_default_headers();
1138 struct xml_ctx ctx;
1139 struct remote_ls_ctx ls;
1140
1141 ls.flags = flags;
1142 ls.path = xstrdup(path);
1143 ls.dentry_name = NULL;
1144 ls.dentry_flags = 0;
1145 ls.userData = userData;
1146 ls.userFunc = userFunc;
1147
1148 strbuf_addstr(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1149
1150 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1151 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1152
1153 slot = get_active_slot();
1154 slot->results = &results;
1155 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1156 &out_buffer, fwrite_buffer);
1157 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1158 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1159
1160 if (start_active_slot(slot)) {
1161 run_active_slot(slot);
1162 if (results.curl_result == CURLE_OK) {
1163 XML_Parser parser = XML_ParserCreate(NULL);
1164 enum XML_Status result;
1165 ctx.name = xcalloc(10, 1);
1166 ctx.len = 0;
1167 ctx.cdata = NULL;
1168 ctx.userFunc = handle_remote_ls_ctx;
1169 ctx.userData = &ls;
1170 XML_SetUserData(parser, &ctx);
1171 XML_SetElementHandler(parser, xml_start_tag,
1172 xml_end_tag);
1173 XML_SetCharacterDataHandler(parser, xml_cdata);
1174 result = XML_Parse(parser, in_buffer.buf,
1175 in_buffer.len, 1);
1176 free(ctx.name);
1177 free(ctx.cdata);
1178
1179 if (result != XML_STATUS_OK) {
1180 fprintf(stderr, "XML error: %s\n",
1181 XML_ErrorString(
1182 XML_GetErrorCode(parser)));
1183 }
1184 XML_ParserFree(parser);
1185 }
1186 } else {
1187 fprintf(stderr, "Unable to start PROPFIND request\n");
1188 }
1189
1190 free(ls.path);
1191 free(ls.dentry_name);
1192 free(url);
1193 strbuf_release(&out_buffer.buf);
1194 strbuf_release(&in_buffer);
1195 curl_slist_free_all(dav_headers);
1196}
1197
1198static void get_remote_object_list(unsigned char parent)
1199{
1200 char path[] = "objects/XX/";
1201 static const char hex[] = "0123456789abcdef";
1202 unsigned int val = parent;
1203
1204 path[8] = hex[val >> 4];
1205 path[9] = hex[val & 0xf];
1206 remote_dir_exists[val] = 0;
1207 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1208 process_ls_object, &val);
1209}
1210
1211static int locking_available(void)
1212{
1213 struct active_request_slot *slot;
1214 struct slot_results results;
1215 struct strbuf in_buffer = STRBUF_INIT;
1216 struct buffer out_buffer = { STRBUF_INIT, 0 };
1217 struct curl_slist *dav_headers = http_copy_default_headers();
1218 struct xml_ctx ctx;
1219 int lock_flags = 0;
1220 char *escaped;
1221
1222 escaped = xml_entities(repo->url);
1223 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1224 free(escaped);
1225
1226 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1227 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1228
1229 slot = get_active_slot();
1230 slot->results = &results;
1231 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1232 &out_buffer, fwrite_buffer);
1233 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1234 curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1235
1236 if (start_active_slot(slot)) {
1237 run_active_slot(slot);
1238 if (results.curl_result == CURLE_OK) {
1239 XML_Parser parser = XML_ParserCreate(NULL);
1240 enum XML_Status result;
1241 ctx.name = xcalloc(10, 1);
1242 ctx.len = 0;
1243 ctx.cdata = NULL;
1244 ctx.userFunc = handle_lockprop_ctx;
1245 ctx.userData = &lock_flags;
1246 XML_SetUserData(parser, &ctx);
1247 XML_SetElementHandler(parser, xml_start_tag,
1248 xml_end_tag);
1249 result = XML_Parse(parser, in_buffer.buf,
1250 in_buffer.len, 1);
1251 free(ctx.name);
1252
1253 if (result != XML_STATUS_OK) {
1254 fprintf(stderr, "XML error: %s\n",
1255 XML_ErrorString(
1256 XML_GetErrorCode(parser)));
1257 lock_flags = 0;
1258 }
1259 XML_ParserFree(parser);
1260 if (!lock_flags)
1261 error("no DAV locking support on %s",
1262 repo->url);
1263
1264 } else {
1265 error("Cannot access URL %s, return code %d",
1266 repo->url, results.curl_result);
1267 lock_flags = 0;
1268 }
1269 } else {
1270 error("Unable to start PROPFIND request on %s", repo->url);
1271 }
1272
1273 strbuf_release(&out_buffer.buf);
1274 strbuf_release(&in_buffer);
1275 curl_slist_free_all(dav_headers);
1276
1277 return lock_flags;
1278}
1279
1280static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1281{
1282 struct object_list *entry = xmalloc(sizeof(struct object_list));
1283 entry->item = obj;
1284 entry->next = *p;
1285 *p = entry;
1286 return &entry->next;
1287}
1288
1289static struct object_list **process_blob(struct blob *blob,
1290 struct object_list **p)
1291{
1292 struct object *obj = &blob->object;
1293
1294 obj->flags |= LOCAL;
1295
1296 if (obj->flags & (UNINTERESTING | SEEN))
1297 return p;
1298
1299 obj->flags |= SEEN;
1300 return add_one_object(obj, p);
1301}
1302
1303static struct object_list **process_tree(struct tree *tree,
1304 struct object_list **p)
1305{
1306 struct object *obj = &tree->object;
1307 struct tree_desc desc;
1308 struct name_entry entry;
1309
1310 obj->flags |= LOCAL;
1311
1312 if (obj->flags & (UNINTERESTING | SEEN))
1313 return p;
1314 if (parse_tree(tree) < 0)
1315 die("bad tree object %s", oid_to_hex(&obj->oid));
1316
1317 obj->flags |= SEEN;
1318 p = add_one_object(obj, p);
1319
1320 init_tree_desc(&desc, &tree->object.oid, tree->buffer, tree->size);
1321
1322 while (tree_entry(&desc, &entry))
1323 switch (object_type(entry.mode)) {
1324 case OBJ_TREE:
1325 p = process_tree(lookup_tree(the_repository, &entry.oid),
1326 p);
1327 break;
1328 case OBJ_BLOB:
1329 p = process_blob(lookup_blob(the_repository, &entry.oid),
1330 p);
1331 break;
1332 default:
1333 /* Subproject commit - not in this repository */
1334 break;
1335 }
1336
1337 free_tree_buffer(tree);
1338 return p;
1339}
1340
1341static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1342{
1343 struct commit *commit;
1344 struct object_list **p = &objects;
1345 int count = 0;
1346
1347 while ((commit = get_revision(revs)) != NULL) {
1348 p = process_tree(repo_get_commit_tree(the_repository, commit),
1349 p);
1350 commit->object.flags |= LOCAL;
1351 if (!(commit->object.flags & UNINTERESTING))
1352 count += add_send_request(&commit->object, lock);
1353 }
1354
1355 for (size_t i = 0; i < revs->pending.nr; i++) {
1356 struct object_array_entry *entry = revs->pending.objects + i;
1357 struct object *obj = entry->item;
1358 const char *name = entry->name;
1359
1360 if (obj->flags & (UNINTERESTING | SEEN))
1361 continue;
1362 if (obj->type == OBJ_TAG) {
1363 obj->flags |= SEEN;
1364 p = add_one_object(obj, p);
1365 continue;
1366 }
1367 if (obj->type == OBJ_TREE) {
1368 p = process_tree((struct tree *)obj, p);
1369 continue;
1370 }
1371 if (obj->type == OBJ_BLOB) {
1372 p = process_blob((struct blob *)obj, p);
1373 continue;
1374 }
1375 die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
1376 }
1377
1378 while (objects) {
1379 struct object_list *next = objects->next;
1380
1381 if (!(objects->item->flags & UNINTERESTING))
1382 count += add_send_request(objects->item, lock);
1383
1384 free(objects);
1385 objects = next;
1386 }
1387
1388 return count;
1389}
1390
1391static int update_remote(const struct object_id *oid, struct remote_lock *lock)
1392{
1393 struct active_request_slot *slot;
1394 struct slot_results results;
1395 struct buffer out_buffer = { STRBUF_INIT, 0 };
1396 struct curl_slist *dav_headers;
1397
1398 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1399
1400 strbuf_addf(&out_buffer.buf, "%s\n", oid_to_hex(oid));
1401
1402 slot = get_active_slot();
1403 slot->results = &results;
1404 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1405 &out_buffer, fwrite_null);
1406 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1407
1408 if (start_active_slot(slot)) {
1409 run_active_slot(slot);
1410 strbuf_release(&out_buffer.buf);
1411 curl_slist_free_all(dav_headers);
1412 if (results.curl_result != CURLE_OK) {
1413 fprintf(stderr,
1414 "PUT error: curl result=%d, HTTP code=%ld\n",
1415 results.curl_result, results.http_code);
1416 /* We should attempt recovery? */
1417 return 0;
1418 }
1419 } else {
1420 strbuf_release(&out_buffer.buf);
1421 curl_slist_free_all(dav_headers);
1422 fprintf(stderr, "Unable to start PUT request\n");
1423 return 0;
1424 }
1425
1426 return 1;
1427}
1428
1429static struct ref *remote_refs;
1430
1431static void one_remote_ref(const char *refname)
1432{
1433 struct ref *ref;
1434 struct object *obj;
1435
1436 ref = alloc_ref(refname);
1437
1438 if (http_fetch_ref(repo->url, ref) != 0) {
1439 fprintf(stderr,
1440 "Unable to fetch ref %s from %s\n",
1441 refname, repo->url);
1442 free(ref);
1443 return;
1444 }
1445
1446 /*
1447 * Fetch a copy of the object if it doesn't exist locally - it
1448 * may be required for updating server info later.
1449 */
1450 if (repo->can_update_info_refs &&
1451 !odb_has_object(the_repository->objects, &ref->old_oid,
1452 HAS_OBJECT_RECHECK_PACKED | HAS_OBJECT_FETCH_PROMISOR)) {
1453 obj = lookup_unknown_object(the_repository, &ref->old_oid);
1454 fprintf(stderr, " fetch %s for %s\n",
1455 oid_to_hex(&ref->old_oid), refname);
1456 add_fetch_request(obj);
1457 }
1458
1459 ref->next = remote_refs;
1460 remote_refs = ref;
1461}
1462
1463static void get_dav_remote_heads(void)
1464{
1465 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1466}
1467
1468static void add_remote_info_ref(struct remote_ls_ctx *ls)
1469{
1470 struct strbuf *buf = (struct strbuf *)ls->userData;
1471 struct object *o;
1472 struct ref *ref;
1473
1474 ref = alloc_ref(ls->dentry_name);
1475
1476 if (http_fetch_ref(repo->url, ref) != 0) {
1477 fprintf(stderr,
1478 "Unable to fetch ref %s from %s\n",
1479 ls->dentry_name, repo->url);
1480 aborted = 1;
1481 free(ref);
1482 return;
1483 }
1484
1485 o = parse_object(the_repository, &ref->old_oid);
1486 if (!o) {
1487 fprintf(stderr,
1488 "Unable to parse object %s for remote ref %s\n",
1489 oid_to_hex(&ref->old_oid), ls->dentry_name);
1490 aborted = 1;
1491 free(ref);
1492 return;
1493 }
1494
1495 strbuf_addf(buf, "%s\t%s\n",
1496 oid_to_hex(&ref->old_oid), ls->dentry_name);
1497
1498 if (o->type == OBJ_TAG) {
1499 o = deref_tag(the_repository, o, ls->dentry_name, 0);
1500 if (o)
1501 strbuf_addf(buf, "%s\t%s^{}\n",
1502 oid_to_hex(&o->oid), ls->dentry_name);
1503 }
1504 free(ref);
1505}
1506
1507static void update_remote_info_refs(struct remote_lock *lock)
1508{
1509 struct buffer buffer = { STRBUF_INIT, 0 };
1510 struct active_request_slot *slot;
1511 struct slot_results results;
1512 struct curl_slist *dav_headers;
1513
1514 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1515 add_remote_info_ref, &buffer.buf);
1516 if (!aborted) {
1517 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1518
1519 slot = get_active_slot();
1520 slot->results = &results;
1521 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1522 &buffer, fwrite_null);
1523 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1524
1525 if (start_active_slot(slot)) {
1526 run_active_slot(slot);
1527 if (results.curl_result != CURLE_OK) {
1528 fprintf(stderr,
1529 "PUT error: curl result=%d, HTTP code=%ld\n",
1530 results.curl_result, results.http_code);
1531 }
1532 }
1533 curl_slist_free_all(dav_headers);
1534 }
1535 strbuf_release(&buffer.buf);
1536}
1537
1538static int remote_exists(const char *path)
1539{
1540 char *url = xstrfmt("%s%s", repo->url, path);
1541 int ret;
1542
1543
1544 switch (http_get_strbuf(url, NULL, NULL)) {
1545 case HTTP_OK:
1546 ret = 1;
1547 break;
1548 case HTTP_MISSING_TARGET:
1549 ret = 0;
1550 break;
1551 case HTTP_ERROR:
1552 error("unable to access '%s': %s", url, curl_errorstr);
1553 /* fallthrough */
1554 default:
1555 ret = -1;
1556 }
1557 free(url);
1558 return ret;
1559}
1560
1561static void fetch_symref(const char *path, char **symref, struct object_id *oid)
1562{
1563 char *url = xstrfmt("%s%s", repo->url, path);
1564 struct strbuf buffer = STRBUF_INIT;
1565 const char *name;
1566
1567 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1568 die("Couldn't get %s for remote symref\n%s", url,
1569 curl_errorstr);
1570 free(url);
1571
1572 FREE_AND_NULL(*symref);
1573 oidclr(oid, the_repository->hash_algo);
1574
1575 if (buffer.len == 0)
1576 return;
1577
1578 /* Cut off trailing newline. */
1579 strbuf_rtrim(&buffer);
1580
1581 /* If it's a symref, set the refname; otherwise try for a sha1 */
1582 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1583 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1584 } else {
1585 get_oid_hex(buffer.buf, oid);
1586 }
1587
1588 strbuf_release(&buffer);
1589}
1590
1591static int verify_merge_base(struct object_id *head_oid, struct ref *remote)
1592{
1593 struct commit *head = lookup_commit_or_die(head_oid, "HEAD");
1594 struct commit *branch = lookup_commit_or_die(&remote->old_oid,
1595 remote->name);
1596 int ret = repo_in_merge_bases(the_repository, branch, head);
1597
1598 if (ret < 0)
1599 exit(128);
1600 return ret;
1601}
1602
1603static int delete_remote_branch(const char *pattern, int force)
1604{
1605 struct ref *refs = remote_refs;
1606 struct ref *remote_ref = NULL;
1607 struct object_id head_oid;
1608 char *symref = NULL;
1609 int match;
1610 int patlen = strlen(pattern);
1611 int i;
1612 struct active_request_slot *slot;
1613 struct slot_results results;
1614 char *url;
1615
1616 /* Find the remote branch(es) matching the specified branch name */
1617 for (match = 0; refs; refs = refs->next) {
1618 char *name = refs->name;
1619 int namelen = strlen(name);
1620 if (namelen < patlen ||
1621 memcmp(name + namelen - patlen, pattern, patlen))
1622 continue;
1623 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1624 continue;
1625 match++;
1626 remote_ref = refs;
1627 }
1628 if (match == 0)
1629 return error("No remote branch matches %s", pattern);
1630 if (match != 1)
1631 return error("More than one remote branch matches %s",
1632 pattern);
1633
1634 /*
1635 * Remote HEAD must be a symref (not exactly foolproof; a remote
1636 * symlink to a symref will look like a symref)
1637 */
1638 fetch_symref("HEAD", &symref, &head_oid);
1639 if (!symref)
1640 return error("Remote HEAD is not a symref");
1641
1642 /* Remote branch must not be the remote HEAD */
1643 for (i = 0; symref && i < MAXDEPTH; i++) {
1644 if (!strcmp(remote_ref->name, symref))
1645 return error("Remote branch %s is the current HEAD",
1646 remote_ref->name);
1647 fetch_symref(symref, &symref, &head_oid);
1648 }
1649
1650 /* Run extra sanity checks if delete is not forced */
1651 if (!force) {
1652 /* Remote HEAD must resolve to a known object */
1653 if (symref)
1654 return error("Remote HEAD symrefs too deep");
1655 if (is_null_oid(&head_oid))
1656 return error("Unable to resolve remote HEAD");
1657 if (!odb_has_object(the_repository->objects, &head_oid,
1658 HAS_OBJECT_RECHECK_PACKED | HAS_OBJECT_FETCH_PROMISOR))
1659 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", oid_to_hex(&head_oid));
1660
1661 /* Remote branch must resolve to a known object */
1662 if (is_null_oid(&remote_ref->old_oid))
1663 return error("Unable to resolve remote branch %s",
1664 remote_ref->name);
1665 if (!odb_has_object(the_repository->objects, &remote_ref->old_oid,
1666 HAS_OBJECT_RECHECK_PACKED | HAS_OBJECT_FETCH_PROMISOR))
1667 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));
1668
1669 /* Remote branch must be an ancestor of remote HEAD */
1670 if (!verify_merge_base(&head_oid, remote_ref)) {
1671 return error("The branch '%s' is not an ancestor "
1672 "of your current HEAD.\n"
1673 "If you are sure you want to delete it,"
1674 " run:\n\t'git http-push -D %s %s'",
1675 remote_ref->name, repo->url, pattern);
1676 }
1677 }
1678
1679 /* Send delete request */
1680 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1681 if (dry_run)
1682 return 0;
1683 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1684 slot = get_active_slot();
1685 slot->results = &results;
1686 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1687 if (start_active_slot(slot)) {
1688 run_active_slot(slot);
1689 free(url);
1690 if (results.curl_result != CURLE_OK)
1691 return error("DELETE request failed (%d/%ld)",
1692 results.curl_result, results.http_code);
1693 } else {
1694 free(url);
1695 return error("Unable to start DELETE request");
1696 }
1697
1698 return 0;
1699}
1700
1701static void run_request_queue(void)
1702{
1703 is_running_queue = 1;
1704 fill_active_slots();
1705 add_fill_function(NULL, fill_active_slot);
1706 do {
1707 finish_all_active_slots();
1708 fill_active_slots();
1709 } while (request_queue_head && !aborted);
1710
1711 is_running_queue = 0;
1712}
1713
1714int cmd_main(int argc, const char **argv)
1715{
1716 struct transfer_request *request;
1717 struct transfer_request *next_request;
1718 struct refspec rs = REFSPEC_INIT_PUSH;
1719 struct remote_lock *ref_lock = NULL;
1720 struct remote_lock *info_ref_lock = NULL;
1721 int delete_branch = 0;
1722 int force_delete = 0;
1723 int objects_to_send;
1724 int rc = 0;
1725 int i;
1726 int new_refs;
1727 struct ref *ref, *local_refs = NULL;
1728
1729 CALLOC_ARRAY(repo, 1);
1730
1731 argv++;
1732 for (i = 1; i < argc; i++, argv++) {
1733 const char *arg = *argv;
1734
1735 if (*arg == '-') {
1736 if (!strcmp(arg, "--all")) {
1737 push_all = MATCH_REFS_ALL;
1738 continue;
1739 }
1740 if (!strcmp(arg, "--force")) {
1741 force_all = 1;
1742 continue;
1743 }
1744 if (!strcmp(arg, "--dry-run")) {
1745 dry_run = 1;
1746 continue;
1747 }
1748 if (!strcmp(arg, "--helper-status")) {
1749 helper_status = 1;
1750 continue;
1751 }
1752 if (!strcmp(arg, "--verbose")) {
1753 push_verbosely = 1;
1754 http_is_verbose = 1;
1755 continue;
1756 }
1757 if (!strcmp(arg, "-d")) {
1758 delete_branch = 1;
1759 continue;
1760 }
1761 if (!strcmp(arg, "-D")) {
1762 delete_branch = 1;
1763 force_delete = 1;
1764 continue;
1765 }
1766 if (!strcmp(arg, "-h"))
1767 usage(http_push_usage);
1768 }
1769 if (!repo->url) {
1770 char *path = strstr(arg, "//");
1771 str_end_url_with_slash(arg, &repo->url);
1772 repo->path_len = strlen(repo->url);
1773 if (path) {
1774 repo->path = strchr(path+2, '/');
1775 if (repo->path)
1776 repo->path_len = strlen(repo->path);
1777 }
1778 continue;
1779 }
1780 refspec_appendn(&rs, argv, argc - i);
1781 break;
1782 }
1783
1784 if (!repo->url)
1785 usage(http_push_usage);
1786
1787 if (delete_branch && rs.nr != 1)
1788 die("You must specify only one branch name when deleting a remote branch");
1789
1790 setup_git_directory();
1791
1792 memset(remote_dir_exists, -1, 256);
1793
1794 http_init(NULL, repo->url, 1);
1795
1796 is_running_queue = 0;
1797
1798 /* Verify DAV compliance/lock support */
1799 if (!locking_available()) {
1800 rc = 1;
1801 goto cleanup;
1802 }
1803
1804 sigchain_push_common(remove_locks_on_signal);
1805
1806 /* Check whether the remote has server info files */
1807 repo->can_update_info_refs = 0;
1808 repo->has_info_refs = remote_exists("info/refs");
1809 repo->has_info_packs = remote_exists("objects/info/packs");
1810 if (repo->has_info_refs) {
1811 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1812 if (info_ref_lock)
1813 repo->can_update_info_refs = 1;
1814 else {
1815 error("cannot lock existing info/refs");
1816 rc = 1;
1817 goto cleanup;
1818 }
1819 }
1820 if (repo->has_info_packs)
1821 fetch_indices();
1822
1823 /* Get a list of all local and remote heads to validate refspecs */
1824 local_refs = get_local_heads();
1825 fprintf(stderr, "Fetching remote heads...\n");
1826 get_dav_remote_heads();
1827 run_request_queue();
1828
1829 /* Remove a remote branch if -d or -D was specified */
1830 if (delete_branch) {
1831 const char *branch = rs.items[i].src;
1832 if (delete_remote_branch(branch, force_delete) == -1) {
1833 fprintf(stderr, "Unable to delete remote branch %s\n",
1834 branch);
1835 if (helper_status)
1836 printf("error %s cannot remove\n", branch);
1837 }
1838 goto cleanup;
1839 }
1840
1841 /* match them up */
1842 if (match_push_refs(local_refs, &remote_refs, &rs, push_all)) {
1843 rc = -1;
1844 goto cleanup;
1845 }
1846 if (!remote_refs) {
1847 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1848 if (helper_status)
1849 printf("error null no match\n");
1850 rc = 0;
1851 goto cleanup;
1852 }
1853
1854 new_refs = 0;
1855 for (ref = remote_refs; ref; ref = ref->next) {
1856 struct rev_info revs;
1857 struct strvec commit_argv = STRVEC_INIT;
1858
1859 if (!ref->peer_ref)
1860 continue;
1861
1862 if (is_null_oid(&ref->peer_ref->new_oid)) {
1863 if (delete_remote_branch(ref->name, 1) == -1) {
1864 error("Could not remove %s", ref->name);
1865 if (helper_status)
1866 printf("error %s cannot remove\n", ref->name);
1867 rc = -4;
1868 }
1869 else if (helper_status)
1870 printf("ok %s\n", ref->name);
1871 new_refs++;
1872 continue;
1873 }
1874
1875 if (oideq(&ref->old_oid, &ref->peer_ref->new_oid)) {
1876 if (push_verbosely)
1877 /* stable plumbing output; do not modify or localize */
1878 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1879 if (helper_status)
1880 printf("ok %s up to date\n", ref->name);
1881 continue;
1882 }
1883
1884 if (!force_all &&
1885 !is_null_oid(&ref->old_oid) &&
1886 !ref->force) {
1887 if (!odb_has_object(the_repository->objects, &ref->old_oid,
1888 HAS_OBJECT_RECHECK_PACKED | HAS_OBJECT_FETCH_PROMISOR) ||
1889 !ref_newer(&ref->peer_ref->new_oid,
1890 &ref->old_oid)) {
1891 /*
1892 * We do not have the remote ref, or
1893 * we know that the remote ref is not
1894 * an ancestor of what we are trying to
1895 * push. Either way this can be losing
1896 * commits at the remote end and likely
1897 * we were not up to date to begin with.
1898 */
1899 /* stable plumbing output; do not modify or localize */
1900 error("remote '%s' is not an ancestor of\n"
1901 "local '%s'.\n"
1902 "Maybe you are not up-to-date and "
1903 "need to pull first?",
1904 ref->name,
1905 ref->peer_ref->name);
1906 if (helper_status)
1907 printf("error %s non-fast forward\n", ref->name);
1908 rc = -2;
1909 continue;
1910 }
1911 }
1912 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1913 new_refs++;
1914
1915 fprintf(stderr, "updating '%s'", ref->name);
1916 if (strcmp(ref->name, ref->peer_ref->name))
1917 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1918 fprintf(stderr, "\n from %s\n to %s\n",
1919 oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
1920 if (dry_run) {
1921 if (helper_status)
1922 printf("ok %s\n", ref->name);
1923 continue;
1924 }
1925
1926 /* Lock remote branch ref */
1927 ref_lock = lock_remote(ref->name, LOCK_TIME);
1928 if (!ref_lock) {
1929 fprintf(stderr, "Unable to lock remote branch %s\n",
1930 ref->name);
1931 if (helper_status)
1932 printf("error %s lock error\n", ref->name);
1933 rc = 1;
1934 continue;
1935 }
1936
1937 /* Set up revision info for this refspec */
1938 strvec_push(&commit_argv, ""); /* ignored */
1939 strvec_push(&commit_argv, "--objects");
1940 strvec_push(&commit_argv, oid_to_hex(&ref->new_oid));
1941 if (!push_all && !is_null_oid(&ref->old_oid))
1942 strvec_pushf(&commit_argv, "^%s",
1943 oid_to_hex(&ref->old_oid));
1944 repo_init_revisions(the_repository, &revs, setup_git_directory());
1945 setup_revisions_from_strvec(&commit_argv, &revs, NULL);
1946 revs.edge_hint = 0; /* just in case */
1947
1948 /* Generate a list of objects that need to be pushed */
1949 pushing = 0;
1950 if (prepare_revision_walk(&revs))
1951 die("revision walk setup failed");
1952 mark_edges_uninteresting(&revs, NULL, 0);
1953 objects_to_send = get_delta(&revs, ref_lock);
1954 finish_all_active_slots();
1955
1956 /* Push missing objects to remote, this would be a
1957 convenient time to pack them first if appropriate. */
1958 pushing = 1;
1959 if (objects_to_send)
1960 fprintf(stderr, " sending %d objects\n",
1961 objects_to_send);
1962
1963 run_request_queue();
1964
1965 /* Update the remote branch if all went well */
1966 if (aborted || !update_remote(&ref->new_oid, ref_lock))
1967 rc = 1;
1968
1969 if (!rc)
1970 fprintf(stderr, " done\n");
1971 if (helper_status)
1972 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1973 unlock_remote(ref_lock);
1974 check_locks();
1975 strvec_clear(&commit_argv);
1976 release_revisions(&revs);
1977 }
1978
1979 /* Update remote server info if appropriate */
1980 if (repo->has_info_refs && new_refs) {
1981 if (info_ref_lock && repo->can_update_info_refs) {
1982 fprintf(stderr, "Updating remote server info\n");
1983 if (!dry_run)
1984 update_remote_info_refs(info_ref_lock);
1985 } else {
1986 fprintf(stderr, "Unable to update server info\n");
1987 }
1988 }
1989
1990 cleanup:
1991 if (info_ref_lock)
1992 unlock_remote(info_ref_lock);
1993 free(repo->url);
1994 free(repo);
1995
1996 http_cleanup();
1997
1998 request = request_queue_head;
1999 while (request != NULL) {
2000 next_request = request->next;
2001 release_request(request);
2002 request = next_request;
2003 }
2004
2005 refspec_clear(&rs);
2006 free_refs(local_refs);
2007
2008 return rc;
2009}