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perl: generalize the Git::LoadCPAN facility
[git.git] / http-push.c
blob0913f8ab860246f990536fd20794ac6230daf50a
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 #include "packfile.h"
15
16 #ifdef EXPAT_NEEDS_XMLPARSE_H
17 #include <xmlparse.h>
18 #else
19 #include <expat.h>
20 #endif
21
22 static const char http_push_usage[] =
23 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
24
25 #ifndef XML_STATUS_OK
26 enum XML_Status {
27 XML_STATUS_OK = 1,
28 XML_STATUS_ERROR = 0
29 };
30 #define XML_STATUS_OK 1
31 #define XML_STATUS_ERROR 0
32 #endif
33
34 #define PREV_BUF_SIZE 4096
35
36 /* DAV methods */
37 #define DAV_LOCK "LOCK"
38 #define DAV_MKCOL "MKCOL"
39 #define DAV_MOVE "MOVE"
40 #define DAV_PROPFIND "PROPFIND"
41 #define DAV_PUT "PUT"
42 #define DAV_UNLOCK "UNLOCK"
43 #define DAV_DELETE "DELETE"
44
45 /* DAV lock flags */
46 #define DAV_PROP_LOCKWR (1u << 0)
47 #define DAV_PROP_LOCKEX (1u << 1)
48 #define DAV_LOCK_OK (1u << 2)
49
50 /* DAV XML properties */
51 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
52 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
53 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
54 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
55 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
56 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
57 #define DAV_PROPFIND_RESP ".multistatus.response"
58 #define DAV_PROPFIND_NAME ".multistatus.response.href"
59 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
60
61 /* DAV request body templates */
62 #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>"
63 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
64 #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>"
65
66 #define LOCK_TIME 600
67 #define LOCK_REFRESH 30
68
69 /* Remember to update object flag allocation in object.h */
70 #define LOCAL (1u<<16)
71 #define REMOTE (1u<<17)
72 #define FETCHING (1u<<18)
73 #define PUSHING (1u<<19)
74
75 /* We allow "recursive" symbolic refs. Only within reason, though */
76 #define MAXDEPTH 5
77
78 static int pushing;
79 static int aborted;
80 static signed char remote_dir_exists[256];
81
82 static int push_verbosely;
83 static int push_all = MATCH_REFS_NONE;
84 static int force_all;
85 static int dry_run;
86 static int helper_status;
87
88 static struct object_list *objects;
89
90 struct repo {
91 char *url;
92 char *path;
93 int path_len;
94 int has_info_refs;
95 int can_update_info_refs;
96 int has_info_packs;
97 struct packed_git *packs;
98 struct remote_lock *locks;
99 };
100
101 static struct repo *repo;
102
103 enum transfer_state {
104 NEED_FETCH,
105 RUN_FETCH_LOOSE,
106 RUN_FETCH_PACKED,
107 NEED_PUSH,
108 RUN_MKCOL,
109 RUN_PUT,
110 RUN_MOVE,
111 ABORTED,
112 COMPLETE
113 };
114
115 struct transfer_request {
116 struct object *obj;
117 char *url;
118 char *dest;
119 struct remote_lock *lock;
120 struct curl_slist *headers;
121 struct buffer buffer;
122 enum transfer_state state;
123 CURLcode curl_result;
124 char errorstr[CURL_ERROR_SIZE];
125 long http_code;
126 void *userData;
127 struct active_request_slot *slot;
128 struct transfer_request *next;
129 };
130
131 static struct transfer_request *request_queue_head;
132
133 struct xml_ctx {
134 char *name;
135 int len;
136 char *cdata;
137 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
138 void *userData;
139 };
140
141 struct remote_lock {
142 char *url;
143 char *owner;
144 char *token;
145 char tmpfile_suffix[41];
146 time_t start_time;
147 long timeout;
148 int refreshing;
149 struct remote_lock *next;
150 };
151
152 /* Flags that control remote_ls processing */
153 #define PROCESS_FILES (1u << 0)
154 #define PROCESS_DIRS (1u << 1)
155 #define RECURSIVE (1u << 2)
156
157 /* Flags that remote_ls passes to callback functions */
158 #define IS_DIR (1u << 0)
159
160 struct remote_ls_ctx {
161 char *path;
162 void (*userFunc)(struct remote_ls_ctx *ls);
163 void *userData;
164 int flags;
165 char *dentry_name;
166 int dentry_flags;
167 struct remote_ls_ctx *parent;
168 };
169
170 /* get_dav_token_headers options */
171 enum dav_header_flag {
172 DAV_HEADER_IF = (1u << 0),
173 DAV_HEADER_LOCK = (1u << 1),
174 DAV_HEADER_TIMEOUT = (1u << 2)
175 };
176
177 static char *xml_entities(const char *s)
178 {
179 struct strbuf buf = STRBUF_INIT;
180 strbuf_addstr_xml_quoted(&buf, s);
181 return strbuf_detach(&buf, NULL);
182 }
183
184 static void curl_setup_http_get(CURL *curl, const char *url,
185 const char *custom_req)
186 {
187 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
188 curl_easy_setopt(curl, CURLOPT_URL, url);
189 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
190 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
191 }
192
193 static void curl_setup_http(CURL *curl, const char *url,
194 const char *custom_req, struct buffer *buffer,
195 curl_write_callback write_fn)
196 {
197 curl_easy_setopt(curl, CURLOPT_PUT, 1);
198 curl_easy_setopt(curl, CURLOPT_URL, url);
199 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
200 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
201 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
202 #ifndef NO_CURL_IOCTL
203 curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
204 curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
205 #endif
206 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
207 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
208 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
209 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
210 }
211
212 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
213 {
214 struct strbuf buf = STRBUF_INIT;
215 struct curl_slist *dav_headers = http_copy_default_headers();
216
217 if (options & DAV_HEADER_IF) {
218 strbuf_addf(&buf, "If: (<%s>)", lock->token);
219 dav_headers = curl_slist_append(dav_headers, buf.buf);
220 strbuf_reset(&buf);
221 }
222 if (options & DAV_HEADER_LOCK) {
223 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
224 dav_headers = curl_slist_append(dav_headers, buf.buf);
225 strbuf_reset(&buf);
226 }
227 if (options & DAV_HEADER_TIMEOUT) {
228 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
229 dav_headers = curl_slist_append(dav_headers, buf.buf);
230 strbuf_reset(&buf);
231 }
232 strbuf_release(&buf);
233
234 return dav_headers;
235 }
236
237 static void finish_request(struct transfer_request *request);
238 static void release_request(struct transfer_request *request);
239
240 static void process_response(void *callback_data)
241 {
242 struct transfer_request *request =
243 (struct transfer_request *)callback_data;
244
245 finish_request(request);
246 }
247
248 #ifdef USE_CURL_MULTI
249
250 static void start_fetch_loose(struct transfer_request *request)
251 {
252 struct active_request_slot *slot;
253 struct http_object_request *obj_req;
254
255 obj_req = new_http_object_request(repo->url, request->obj->oid.hash);
256 if (obj_req == NULL) {
257 request->state = ABORTED;
258 return;
259 }
260
261 slot = obj_req->slot;
262 slot->callback_func = process_response;
263 slot->callback_data = request;
264 request->slot = slot;
265 request->userData = obj_req;
266
267 /* Try to get the request started, abort the request on error */
268 request->state = RUN_FETCH_LOOSE;
269 if (!start_active_slot(slot)) {
270 fprintf(stderr, "Unable to start GET request\n");
271 repo->can_update_info_refs = 0;
272 release_http_object_request(obj_req);
273 release_request(request);
274 }
275 }
276
277 static void start_mkcol(struct transfer_request *request)
278 {
279 char *hex = oid_to_hex(&request->obj->oid);
280 struct active_request_slot *slot;
281
282 request->url = get_remote_object_url(repo->url, hex, 1);
283
284 slot = get_active_slot();
285 slot->callback_func = process_response;
286 slot->callback_data = request;
287 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
288 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
289
290 if (start_active_slot(slot)) {
291 request->slot = slot;
292 request->state = RUN_MKCOL;
293 } else {
294 request->state = ABORTED;
295 FREE_AND_NULL(request->url);
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_AND_NULL(request->url);
413 }
414 }
415
416 static void start_move(struct transfer_request *request)
417 {
418 struct active_request_slot *slot;
419 struct curl_slist *dav_headers = http_copy_default_headers();
420
421 slot = get_active_slot();
422 slot->callback_func = process_response;
423 slot->callback_data = request;
424 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
425 dav_headers = curl_slist_append(dav_headers, request->dest);
426 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
427 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
428
429 if (start_active_slot(slot)) {
430 request->slot = slot;
431 request->state = RUN_MOVE;
432 } else {
433 request->state = ABORTED;
434 FREE_AND_NULL(request->url);
435 }
436 }
437
438 static int refresh_lock(struct remote_lock *lock)
439 {
440 struct active_request_slot *slot;
441 struct slot_results results;
442 struct curl_slist *dav_headers;
443 int rc = 0;
444
445 lock->refreshing = 1;
446
447 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
448
449 slot = get_active_slot();
450 slot->results = &results;
451 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
452 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
453
454 if (start_active_slot(slot)) {
455 run_active_slot(slot);
456 if (results.curl_result != CURLE_OK) {
457 fprintf(stderr, "LOCK HTTP error %ld\n",
458 results.http_code);
459 } else {
460 lock->start_time = time(NULL);
461 rc = 1;
462 }
463 }
464
465 lock->refreshing = 0;
466 curl_slist_free_all(dav_headers);
467
468 return rc;
469 }
470
471 static void check_locks(void)
472 {
473 struct remote_lock *lock = repo->locks;
474 time_t current_time = time(NULL);
475 int time_remaining;
476
477 while (lock) {
478 time_remaining = lock->start_time + lock->timeout -
479 current_time;
480 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
481 if (!refresh_lock(lock)) {
482 fprintf(stderr,
483 "Unable to refresh lock for %s\n",
484 lock->url);
485 aborted = 1;
486 return;
487 }
488 }
489 lock = lock->next;
490 }
491 }
492
493 static void release_request(struct transfer_request *request)
494 {
495 struct transfer_request *entry = request_queue_head;
496
497 if (request == request_queue_head) {
498 request_queue_head = request->next;
499 } else {
500 while (entry->next != NULL && entry->next != request)
501 entry = entry->next;
502 if (entry->next == request)
503 entry->next = entry->next->next;
504 }
505
506 free(request->url);
507 free(request);
508 }
509
510 static void finish_request(struct transfer_request *request)
511 {
512 struct http_pack_request *preq;
513 struct http_object_request *obj_req;
514
515 request->curl_result = request->slot->curl_result;
516 request->http_code = request->slot->http_code;
517 request->slot = NULL;
518
519 /* Keep locks active */
520 check_locks();
521
522 if (request->headers != NULL)
523 curl_slist_free_all(request->headers);
524
525 /* URL is reused for MOVE after PUT */
526 if (request->state != RUN_PUT) {
527 FREE_AND_NULL(request->url);
528 }
529
530 if (request->state == RUN_MKCOL) {
531 if (request->curl_result == CURLE_OK ||
532 request->http_code == 405) {
533 remote_dir_exists[request->obj->oid.hash[0]] = 1;
534 start_put(request);
535 } else {
536 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
537 oid_to_hex(&request->obj->oid),
538 request->curl_result, request->http_code);
539 request->state = ABORTED;
540 aborted = 1;
541 }
542 } else if (request->state == RUN_PUT) {
543 if (request->curl_result == CURLE_OK) {
544 start_move(request);
545 } else {
546 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
547 oid_to_hex(&request->obj->oid),
548 request->curl_result, request->http_code);
549 request->state = ABORTED;
550 aborted = 1;
551 }
552 } else if (request->state == RUN_MOVE) {
553 if (request->curl_result == CURLE_OK) {
554 if (push_verbosely)
555 fprintf(stderr, " sent %s\n",
556 oid_to_hex(&request->obj->oid));
557 request->obj->flags |= REMOTE;
558 release_request(request);
559 } else {
560 fprintf(stderr, "MOVE %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_FETCH_LOOSE) {
567 obj_req = (struct http_object_request *)request->userData;
568
569 if (finish_http_object_request(obj_req) == 0)
570 if (obj_req->rename == 0)
571 request->obj->flags |= (LOCAL | REMOTE);
572
573 /* Try fetching packed if necessary */
574 if (request->obj->flags & LOCAL) {
575 release_http_object_request(obj_req);
576 release_request(request);
577 } else
578 start_fetch_packed(request);
579
580 } else if (request->state == RUN_FETCH_PACKED) {
581 int fail = 1;
582 if (request->curl_result != CURLE_OK) {
583 fprintf(stderr, "Unable to get pack file %s\n%s",
584 request->url, curl_errorstr);
585 } else {
586 preq = (struct http_pack_request *)request->userData;
587
588 if (preq) {
589 if (finish_http_pack_request(preq) == 0)
590 fail = 0;
591 release_http_pack_request(preq);
592 }
593 }
594 if (fail)
595 repo->can_update_info_refs = 0;
596 release_request(request);
597 }
598 }
599
600 #ifdef USE_CURL_MULTI
601 static int is_running_queue;
602 static int fill_active_slot(void *unused)
603 {
604 struct transfer_request *request;
605
606 if (aborted || !is_running_queue)
607 return 0;
608
609 for (request = request_queue_head; request; request = request->next) {
610 if (request->state == NEED_FETCH) {
611 start_fetch_loose(request);
612 return 1;
613 } else if (pushing && request->state == NEED_PUSH) {
614 if (remote_dir_exists[request->obj->oid.hash[0]] == 1) {
615 start_put(request);
616 } else {
617 start_mkcol(request);
618 }
619 return 1;
620 }
621 }
622 return 0;
623 }
624 #endif
625
626 static void get_remote_object_list(unsigned char parent);
627
628 static void add_fetch_request(struct object *obj)
629 {
630 struct transfer_request *request;
631
632 check_locks();
633
634 /*
635 * Don't fetch the object if it's known to exist locally
636 * or is already in the request queue
637 */
638 if (remote_dir_exists[obj->oid.hash[0]] == -1)
639 get_remote_object_list(obj->oid.hash[0]);
640 if (obj->flags & (LOCAL | FETCHING))
641 return;
642
643 obj->flags |= FETCHING;
644 request = xmalloc(sizeof(*request));
645 request->obj = obj;
646 request->url = NULL;
647 request->lock = NULL;
648 request->headers = NULL;
649 request->state = NEED_FETCH;
650 request->next = request_queue_head;
651 request_queue_head = request;
652
653 #ifdef USE_CURL_MULTI
654 fill_active_slots();
655 step_active_slots();
656 #endif
657 }
658
659 static int add_send_request(struct object *obj, struct remote_lock *lock)
660 {
661 struct transfer_request *request;
662 struct packed_git *target;
663
664 /* Keep locks active */
665 check_locks();
666
667 /*
668 * Don't push the object if it's known to exist on the remote
669 * or is already in the request queue
670 */
671 if (remote_dir_exists[obj->oid.hash[0]] == -1)
672 get_remote_object_list(obj->oid.hash[0]);
673 if (obj->flags & (REMOTE | PUSHING))
674 return 0;
675 target = find_sha1_pack(obj->oid.hash, repo->packs);
676 if (target) {
677 obj->flags |= REMOTE;
678 return 0;
679 }
680
681 obj->flags |= PUSHING;
682 request = xmalloc(sizeof(*request));
683 request->obj = obj;
684 request->url = NULL;
685 request->lock = lock;
686 request->headers = NULL;
687 request->state = NEED_PUSH;
688 request->next = request_queue_head;
689 request_queue_head = request;
690
691 #ifdef USE_CURL_MULTI
692 fill_active_slots();
693 step_active_slots();
694 #endif
695
696 return 1;
697 }
698
699 static int fetch_indices(void)
700 {
701 int ret;
702
703 if (push_verbosely)
704 fprintf(stderr, "Getting pack list\n");
705
706 switch (http_get_info_packs(repo->url, &repo->packs)) {
707 case HTTP_OK:
708 case HTTP_MISSING_TARGET:
709 ret = 0;
710 break;
711 default:
712 ret = -1;
713 }
714
715 return ret;
716 }
717
718 static void one_remote_object(const struct object_id *oid)
719 {
720 struct object *obj;
721
722 obj = lookup_object(oid->hash);
723 if (!obj)
724 obj = parse_object(oid);
725
726 /* Ignore remote objects that don't exist locally */
727 if (!obj)
728 return;
729
730 obj->flags |= REMOTE;
731 if (!object_list_contains(objects, obj))
732 object_list_insert(obj, &objects);
733 }
734
735 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
736 {
737 int *lock_flags = (int *)ctx->userData;
738
739 if (tag_closed) {
740 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
741 if ((*lock_flags & DAV_PROP_LOCKEX) &&
742 (*lock_flags & DAV_PROP_LOCKWR)) {
743 *lock_flags |= DAV_LOCK_OK;
744 }
745 *lock_flags &= DAV_LOCK_OK;
746 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
747 *lock_flags |= DAV_PROP_LOCKWR;
748 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
749 *lock_flags |= DAV_PROP_LOCKEX;
750 }
751 }
752 }
753
754 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
755 {
756 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
757 git_SHA_CTX sha_ctx;
758 unsigned char lock_token_sha1[20];
759
760 if (tag_closed && ctx->cdata) {
761 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
762 lock->owner = xstrdup(ctx->cdata);
763 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
764 const char *arg;
765 if (skip_prefix(ctx->cdata, "Second-", &arg))
766 lock->timeout = strtol(arg, NULL, 10);
767 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
768 lock->token = xstrdup(ctx->cdata);
769
770 git_SHA1_Init(&sha_ctx);
771 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
772 git_SHA1_Final(lock_token_sha1, &sha_ctx);
773
774 lock->tmpfile_suffix[0] = '_';
775 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
776 }
777 }
778 }
779
780 static void one_remote_ref(const char *refname);
781
782 static void
783 xml_start_tag(void *userData, const char *name, const char **atts)
784 {
785 struct xml_ctx *ctx = (struct xml_ctx *)userData;
786 const char *c = strchr(name, ':');
787 int old_namelen, new_len;
788
789 if (c == NULL)
790 c = name;
791 else
792 c++;
793
794 old_namelen = strlen(ctx->name);
795 new_len = old_namelen + strlen(c) + 2;
796
797 if (new_len > ctx->len) {
798 ctx->name = xrealloc(ctx->name, new_len);
799 ctx->len = new_len;
800 }
801 xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
802
803 FREE_AND_NULL(ctx->cdata);
804
805 ctx->userFunc(ctx, 0);
806 }
807
808 static void
809 xml_end_tag(void *userData, const char *name)
810 {
811 struct xml_ctx *ctx = (struct xml_ctx *)userData;
812 const char *c = strchr(name, ':');
813 char *ep;
814
815 ctx->userFunc(ctx, 1);
816
817 if (c == NULL)
818 c = name;
819 else
820 c++;
821
822 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
823 *ep = 0;
824 }
825
826 static void
827 xml_cdata(void *userData, const XML_Char *s, int len)
828 {
829 struct xml_ctx *ctx = (struct xml_ctx *)userData;
830 free(ctx->cdata);
831 ctx->cdata = xmemdupz(s, len);
832 }
833
834 static struct remote_lock *lock_remote(const char *path, long timeout)
835 {
836 struct active_request_slot *slot;
837 struct slot_results results;
838 struct buffer out_buffer = { STRBUF_INIT, 0 };
839 struct strbuf in_buffer = STRBUF_INIT;
840 char *url;
841 char *ep;
842 char timeout_header[25];
843 struct remote_lock *lock = NULL;
844 struct curl_slist *dav_headers = http_copy_default_headers();
845 struct xml_ctx ctx;
846 char *escaped;
847
848 url = xstrfmt("%s%s", repo->url, path);
849
850 /* Make sure leading directories exist for the remote ref */
851 ep = strchr(url + strlen(repo->url) + 1, '/');
852 while (ep) {
853 char saved_character = ep[1];
854 ep[1] = '\0';
855 slot = get_active_slot();
856 slot->results = &results;
857 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
858 if (start_active_slot(slot)) {
859 run_active_slot(slot);
860 if (results.curl_result != CURLE_OK &&
861 results.http_code != 405) {
862 fprintf(stderr,
863 "Unable to create branch path %s\n",
864 url);
865 free(url);
866 return NULL;
867 }
868 } else {
869 fprintf(stderr, "Unable to start MKCOL request\n");
870 free(url);
871 return NULL;
872 }
873 ep[1] = saved_character;
874 ep = strchr(ep + 1, '/');
875 }
876
877 escaped = xml_entities(ident_default_email());
878 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
879 free(escaped);
880
881 xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
882 dav_headers = curl_slist_append(dav_headers, timeout_header);
883 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
884
885 slot = get_active_slot();
886 slot->results = &results;
887 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
888 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
889 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
890
891 lock = xcalloc(1, sizeof(*lock));
892 lock->timeout = -1;
893
894 if (start_active_slot(slot)) {
895 run_active_slot(slot);
896 if (results.curl_result == CURLE_OK) {
897 XML_Parser parser = XML_ParserCreate(NULL);
898 enum XML_Status result;
899 ctx.name = xcalloc(10, 1);
900 ctx.len = 0;
901 ctx.cdata = NULL;
902 ctx.userFunc = handle_new_lock_ctx;
903 ctx.userData = lock;
904 XML_SetUserData(parser, &ctx);
905 XML_SetElementHandler(parser, xml_start_tag,
906 xml_end_tag);
907 XML_SetCharacterDataHandler(parser, xml_cdata);
908 result = XML_Parse(parser, in_buffer.buf,
909 in_buffer.len, 1);
910 free(ctx.name);
911 if (result != XML_STATUS_OK) {
912 fprintf(stderr, "XML error: %s\n",
913 XML_ErrorString(
914 XML_GetErrorCode(parser)));
915 lock->timeout = -1;
916 }
917 XML_ParserFree(parser);
918 } else {
919 fprintf(stderr,
920 "error: curl result=%d, HTTP code=%ld\n",
921 results.curl_result, results.http_code);
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_AND_NULL(lock);
936 } else {
937 lock->url = url;
938 lock->start_time = time(NULL);
939 lock->next = repo->locks;
940 repo->locks = lock;
941 }
942
943 return lock;
944 }
945
946 static int unlock_remote(struct remote_lock *lock)
947 {
948 struct active_request_slot *slot;
949 struct slot_results results;
950 struct remote_lock *prev = repo->locks;
951 struct curl_slist *dav_headers;
952 int rc = 0;
953
954 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
955
956 slot = get_active_slot();
957 slot->results = &results;
958 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
959 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
960
961 if (start_active_slot(slot)) {
962 run_active_slot(slot);
963 if (results.curl_result == CURLE_OK)
964 rc = 1;
965 else
966 fprintf(stderr, "UNLOCK HTTP error %ld\n",
967 results.http_code);
968 } else {
969 fprintf(stderr, "Unable to start UNLOCK request\n");
970 }
971
972 curl_slist_free_all(dav_headers);
973
974 if (repo->locks == lock) {
975 repo->locks = lock->next;
976 } else {
977 while (prev && prev->next != lock)
978 prev = prev->next;
979 if (prev)
980 prev->next = prev->next->next;
981 }
982
983 free(lock->owner);
984 free(lock->url);
985 free(lock->token);
986 free(lock);
987
988 return rc;
989 }
990
991 static void remove_locks(void)
992 {
993 struct remote_lock *lock = repo->locks;
994
995 fprintf(stderr, "Removing remote locks...\n");
996 while (lock) {
997 struct remote_lock *next = lock->next;
998 unlock_remote(lock);
999 lock = next;
1000 }
1001 }
1002
1003 static void remove_locks_on_signal(int signo)
1004 {
1005 remove_locks();
1006 sigchain_pop(signo);
1007 raise(signo);
1008 }
1009
1010 static void remote_ls(const char *path, int flags,
1011 void (*userFunc)(struct remote_ls_ctx *ls),
1012 void *userData);
1013
1014 /* extract hex from sharded "xx/x{38}" filename */
1015 static int get_oid_hex_from_objpath(const char *path, struct object_id *oid)
1016 {
1017 if (strlen(path) != GIT_SHA1_HEXSZ + 1)
1018 return -1;
1019
1020 if (hex_to_bytes(oid->hash, path, 1))
1021 return -1;
1022 path += 2;
1023 path++; /* skip '/' */
1024
1025 return hex_to_bytes(oid->hash + 1, path, GIT_SHA1_RAWSZ - 1);
1026 }
1027
1028 static void process_ls_object(struct remote_ls_ctx *ls)
1029 {
1030 unsigned int *parent = (unsigned int *)ls->userData;
1031 const char *path = ls->dentry_name;
1032 struct object_id oid;
1033
1034 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1035 remote_dir_exists[*parent] = 1;
1036 return;
1037 }
1038
1039 if (!skip_prefix(path, "objects/", &path) ||
1040 get_oid_hex_from_objpath(path, &oid))
1041 return;
1042
1043 one_remote_object(&oid);
1044 }
1045
1046 static void process_ls_ref(struct remote_ls_ctx *ls)
1047 {
1048 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1049 fprintf(stderr, " %s\n", ls->dentry_name);
1050 return;
1051 }
1052
1053 if (!(ls->dentry_flags & IS_DIR))
1054 one_remote_ref(ls->dentry_name);
1055 }
1056
1057 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1058 {
1059 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1060
1061 if (tag_closed) {
1062 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1063 if (ls->dentry_flags & IS_DIR) {
1064
1065 /* ensure collection names end with slash */
1066 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1067
1068 if (ls->flags & PROCESS_DIRS) {
1069 ls->userFunc(ls);
1070 }
1071 if (strcmp(ls->dentry_name, ls->path) &&
1072 ls->flags & RECURSIVE) {
1073 remote_ls(ls->dentry_name,
1074 ls->flags,
1075 ls->userFunc,
1076 ls->userData);
1077 }
1078 } else if (ls->flags & PROCESS_FILES) {
1079 ls->userFunc(ls);
1080 }
1081 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1082 char *path = ctx->cdata;
1083 if (*ctx->cdata == 'h') {
1084 path = strstr(path, "//");
1085 if (path) {
1086 path = strchr(path+2, '/');
1087 }
1088 }
1089 if (path) {
1090 const char *url = repo->url;
1091 if (repo->path)
1092 url = repo->path;
1093 if (strncmp(path, url, repo->path_len))
1094 error("Parsed path '%s' does not match url: '%s'",
1095 path, url);
1096 else {
1097 path += repo->path_len;
1098 ls->dentry_name = xstrdup(path);
1099 }
1100 }
1101 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1102 ls->dentry_flags |= IS_DIR;
1103 }
1104 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1105 FREE_AND_NULL(ls->dentry_name);
1106 ls->dentry_flags = 0;
1107 }
1108 }
1109
1110 /*
1111 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1112 * should _only_ heed the information from that file, instead of trying to
1113 * determine the refs from the remote file system (badly: it does not even
1114 * know about packed-refs).
1115 */
1116 static void remote_ls(const char *path, int flags,
1117 void (*userFunc)(struct remote_ls_ctx *ls),
1118 void *userData)
1119 {
1120 char *url = xstrfmt("%s%s", repo->url, path);
1121 struct active_request_slot *slot;
1122 struct slot_results results;
1123 struct strbuf in_buffer = STRBUF_INIT;
1124 struct buffer out_buffer = { STRBUF_INIT, 0 };
1125 struct curl_slist *dav_headers = http_copy_default_headers();
1126 struct xml_ctx ctx;
1127 struct remote_ls_ctx ls;
1128
1129 ls.flags = flags;
1130 ls.path = xstrdup(path);
1131 ls.dentry_name = NULL;
1132 ls.dentry_flags = 0;
1133 ls.userData = userData;
1134 ls.userFunc = userFunc;
1135
1136 strbuf_addstr(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1137
1138 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1139 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1140
1141 slot = get_active_slot();
1142 slot->results = &results;
1143 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1144 &out_buffer, fwrite_buffer);
1145 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1146 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1147
1148 if (start_active_slot(slot)) {
1149 run_active_slot(slot);
1150 if (results.curl_result == CURLE_OK) {
1151 XML_Parser parser = XML_ParserCreate(NULL);
1152 enum XML_Status result;
1153 ctx.name = xcalloc(10, 1);
1154 ctx.len = 0;
1155 ctx.cdata = NULL;
1156 ctx.userFunc = handle_remote_ls_ctx;
1157 ctx.userData = &ls;
1158 XML_SetUserData(parser, &ctx);
1159 XML_SetElementHandler(parser, xml_start_tag,
1160 xml_end_tag);
1161 XML_SetCharacterDataHandler(parser, xml_cdata);
1162 result = XML_Parse(parser, in_buffer.buf,
1163 in_buffer.len, 1);
1164 free(ctx.name);
1165
1166 if (result != XML_STATUS_OK) {
1167 fprintf(stderr, "XML error: %s\n",
1168 XML_ErrorString(
1169 XML_GetErrorCode(parser)));
1170 }
1171 XML_ParserFree(parser);
1172 }
1173 } else {
1174 fprintf(stderr, "Unable to start PROPFIND request\n");
1175 }
1176
1177 free(ls.path);
1178 free(url);
1179 strbuf_release(&out_buffer.buf);
1180 strbuf_release(&in_buffer);
1181 curl_slist_free_all(dav_headers);
1182 }
1183
1184 static void get_remote_object_list(unsigned char parent)
1185 {
1186 char path[] = "objects/XX/";
1187 static const char hex[] = "0123456789abcdef";
1188 unsigned int val = parent;
1189
1190 path[8] = hex[val >> 4];
1191 path[9] = hex[val & 0xf];
1192 remote_dir_exists[val] = 0;
1193 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1194 process_ls_object, &val);
1195 }
1196
1197 static int locking_available(void)
1198 {
1199 struct active_request_slot *slot;
1200 struct slot_results results;
1201 struct strbuf in_buffer = STRBUF_INIT;
1202 struct buffer out_buffer = { STRBUF_INIT, 0 };
1203 struct curl_slist *dav_headers = http_copy_default_headers();
1204 struct xml_ctx ctx;
1205 int lock_flags = 0;
1206 char *escaped;
1207
1208 escaped = xml_entities(repo->url);
1209 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1210 free(escaped);
1211
1212 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1213 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1214
1215 slot = get_active_slot();
1216 slot->results = &results;
1217 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1218 &out_buffer, fwrite_buffer);
1219 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1220 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1221
1222 if (start_active_slot(slot)) {
1223 run_active_slot(slot);
1224 if (results.curl_result == CURLE_OK) {
1225 XML_Parser parser = XML_ParserCreate(NULL);
1226 enum XML_Status result;
1227 ctx.name = xcalloc(10, 1);
1228 ctx.len = 0;
1229 ctx.cdata = NULL;
1230 ctx.userFunc = handle_lockprop_ctx;
1231 ctx.userData = &lock_flags;
1232 XML_SetUserData(parser, &ctx);
1233 XML_SetElementHandler(parser, xml_start_tag,
1234 xml_end_tag);
1235 result = XML_Parse(parser, in_buffer.buf,
1236 in_buffer.len, 1);
1237 free(ctx.name);
1238
1239 if (result != XML_STATUS_OK) {
1240 fprintf(stderr, "XML error: %s\n",
1241 XML_ErrorString(
1242 XML_GetErrorCode(parser)));
1243 lock_flags = 0;
1244 }
1245 XML_ParserFree(parser);
1246 if (!lock_flags)
1247 error("no DAV locking support on %s",
1248 repo->url);
1249
1250 } else {
1251 error("Cannot access URL %s, return code %d",
1252 repo->url, results.curl_result);
1253 lock_flags = 0;
1254 }
1255 } else {
1256 error("Unable to start PROPFIND request on %s", repo->url);
1257 }
1258
1259 strbuf_release(&out_buffer.buf);
1260 strbuf_release(&in_buffer);
1261 curl_slist_free_all(dav_headers);
1262
1263 return lock_flags;
1264 }
1265
1266 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1267 {
1268 struct object_list *entry = xmalloc(sizeof(struct object_list));
1269 entry->item = obj;
1270 entry->next = *p;
1271 *p = entry;
1272 return &entry->next;
1273 }
1274
1275 static struct object_list **process_blob(struct blob *blob,
1276 struct object_list **p)
1277 {
1278 struct object *obj = &blob->object;
1279
1280 obj->flags |= LOCAL;
1281
1282 if (obj->flags & (UNINTERESTING | SEEN))
1283 return p;
1284
1285 obj->flags |= SEEN;
1286 return add_one_object(obj, p);
1287 }
1288
1289 static struct object_list **process_tree(struct tree *tree,
1290 struct object_list **p)
1291 {
1292 struct object *obj = &tree->object;
1293 struct tree_desc desc;
1294 struct name_entry entry;
1295
1296 obj->flags |= LOCAL;
1297
1298 if (obj->flags & (UNINTERESTING | SEEN))
1299 return p;
1300 if (parse_tree(tree) < 0)
1301 die("bad tree object %s", oid_to_hex(&obj->oid));
1302
1303 obj->flags |= SEEN;
1304 p = add_one_object(obj, p);
1305
1306 init_tree_desc(&desc, tree->buffer, tree->size);
1307
1308 while (tree_entry(&desc, &entry))
1309 switch (object_type(entry.mode)) {
1310 case OBJ_TREE:
1311 p = process_tree(lookup_tree(entry.oid), p);
1312 break;
1313 case OBJ_BLOB:
1314 p = process_blob(lookup_blob(entry.oid), p);
1315 break;
1316 default:
1317 /* Subproject commit - not in this repository */
1318 break;
1319 }
1320
1321 free_tree_buffer(tree);
1322 return p;
1323 }
1324
1325 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1326 {
1327 int i;
1328 struct commit *commit;
1329 struct object_list **p = &objects;
1330 int count = 0;
1331
1332 while ((commit = get_revision(revs)) != NULL) {
1333 p = process_tree(commit->tree, p);
1334 commit->object.flags |= LOCAL;
1335 if (!(commit->object.flags & UNINTERESTING))
1336 count += add_send_request(&commit->object, lock);
1337 }
1338
1339 for (i = 0; i < revs->pending.nr; i++) {
1340 struct object_array_entry *entry = revs->pending.objects + i;
1341 struct object *obj = entry->item;
1342 const char *name = entry->name;
1343
1344 if (obj->flags & (UNINTERESTING | SEEN))
1345 continue;
1346 if (obj->type == OBJ_TAG) {
1347 obj->flags |= SEEN;
1348 p = add_one_object(obj, p);
1349 continue;
1350 }
1351 if (obj->type == OBJ_TREE) {
1352 p = process_tree((struct tree *)obj, p);
1353 continue;
1354 }
1355 if (obj->type == OBJ_BLOB) {
1356 p = process_blob((struct blob *)obj, p);
1357 continue;
1358 }
1359 die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
1360 }
1361
1362 while (objects) {
1363 if (!(objects->item->flags & UNINTERESTING))
1364 count += add_send_request(objects->item, lock);
1365 objects = objects->next;
1366 }
1367
1368 return count;
1369 }
1370
1371 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1372 {
1373 struct active_request_slot *slot;
1374 struct slot_results results;
1375 struct buffer out_buffer = { STRBUF_INIT, 0 };
1376 struct curl_slist *dav_headers;
1377
1378 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1379
1380 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1381
1382 slot = get_active_slot();
1383 slot->results = &results;
1384 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1385 &out_buffer, fwrite_null);
1386 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1387
1388 if (start_active_slot(slot)) {
1389 run_active_slot(slot);
1390 strbuf_release(&out_buffer.buf);
1391 if (results.curl_result != CURLE_OK) {
1392 fprintf(stderr,
1393 "PUT error: curl result=%d, HTTP code=%ld\n",
1394 results.curl_result, results.http_code);
1395 /* We should attempt recovery? */
1396 return 0;
1397 }
1398 } else {
1399 strbuf_release(&out_buffer.buf);
1400 fprintf(stderr, "Unable to start PUT request\n");
1401 return 0;
1402 }
1403
1404 return 1;
1405 }
1406
1407 static struct ref *remote_refs;
1408
1409 static void one_remote_ref(const char *refname)
1410 {
1411 struct ref *ref;
1412 struct object *obj;
1413
1414 ref = alloc_ref(refname);
1415
1416 if (http_fetch_ref(repo->url, ref) != 0) {
1417 fprintf(stderr,
1418 "Unable to fetch ref %s from %s\n",
1419 refname, repo->url);
1420 free(ref);
1421 return;
1422 }
1423
1424 /*
1425 * Fetch a copy of the object if it doesn't exist locally - it
1426 * may be required for updating server info later.
1427 */
1428 if (repo->can_update_info_refs && !has_object_file(&ref->old_oid)) {
1429 obj = lookup_unknown_object(ref->old_oid.hash);
1430 fprintf(stderr, " fetch %s for %s\n",
1431 oid_to_hex(&ref->old_oid), refname);
1432 add_fetch_request(obj);
1433 }
1434
1435 ref->next = remote_refs;
1436 remote_refs = ref;
1437 }
1438
1439 static void get_dav_remote_heads(void)
1440 {
1441 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1442 }
1443
1444 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1445 {
1446 struct strbuf *buf = (struct strbuf *)ls->userData;
1447 struct object *o;
1448 struct ref *ref;
1449
1450 ref = alloc_ref(ls->dentry_name);
1451
1452 if (http_fetch_ref(repo->url, ref) != 0) {
1453 fprintf(stderr,
1454 "Unable to fetch ref %s from %s\n",
1455 ls->dentry_name, repo->url);
1456 aborted = 1;
1457 free(ref);
1458 return;
1459 }
1460
1461 o = parse_object(&ref->old_oid);
1462 if (!o) {
1463 fprintf(stderr,
1464 "Unable to parse object %s for remote ref %s\n",
1465 oid_to_hex(&ref->old_oid), ls->dentry_name);
1466 aborted = 1;
1467 free(ref);
1468 return;
1469 }
1470
1471 strbuf_addf(buf, "%s\t%s\n",
1472 oid_to_hex(&ref->old_oid), ls->dentry_name);
1473
1474 if (o->type == OBJ_TAG) {
1475 o = deref_tag(o, ls->dentry_name, 0);
1476 if (o)
1477 strbuf_addf(buf, "%s\t%s^{}\n",
1478 oid_to_hex(&o->oid), ls->dentry_name);
1479 }
1480 free(ref);
1481 }
1482
1483 static void update_remote_info_refs(struct remote_lock *lock)
1484 {
1485 struct buffer buffer = { STRBUF_INIT, 0 };
1486 struct active_request_slot *slot;
1487 struct slot_results results;
1488 struct curl_slist *dav_headers;
1489
1490 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1491 add_remote_info_ref, &buffer.buf);
1492 if (!aborted) {
1493 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1494
1495 slot = get_active_slot();
1496 slot->results = &results;
1497 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1498 &buffer, fwrite_null);
1499 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1500
1501 if (start_active_slot(slot)) {
1502 run_active_slot(slot);
1503 if (results.curl_result != CURLE_OK) {
1504 fprintf(stderr,
1505 "PUT error: curl result=%d, HTTP code=%ld\n",
1506 results.curl_result, results.http_code);
1507 }
1508 }
1509 }
1510 strbuf_release(&buffer.buf);
1511 }
1512
1513 static int remote_exists(const char *path)
1514 {
1515 char *url = xstrfmt("%s%s", repo->url, path);
1516 int ret;
1517
1518
1519 switch (http_get_strbuf(url, NULL, NULL)) {
1520 case HTTP_OK:
1521 ret = 1;
1522 break;
1523 case HTTP_MISSING_TARGET:
1524 ret = 0;
1525 break;
1526 case HTTP_ERROR:
1527 error("unable to access '%s': %s", url, curl_errorstr);
1528 /* fallthrough */
1529 default:
1530 ret = -1;
1531 }
1532 free(url);
1533 return ret;
1534 }
1535
1536 static void fetch_symref(const char *path, char **symref, struct object_id *oid)
1537 {
1538 char *url = xstrfmt("%s%s", repo->url, path);
1539 struct strbuf buffer = STRBUF_INIT;
1540 const char *name;
1541
1542 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1543 die("Couldn't get %s for remote symref\n%s", url,
1544 curl_errorstr);
1545 free(url);
1546
1547 FREE_AND_NULL(*symref);
1548 oidclr(oid);
1549
1550 if (buffer.len == 0)
1551 return;
1552
1553 /* Cut off trailing newline. */
1554 strbuf_rtrim(&buffer);
1555
1556 /* If it's a symref, set the refname; otherwise try for a sha1 */
1557 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1558 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1559 } else {
1560 get_oid_hex(buffer.buf, oid);
1561 }
1562
1563 strbuf_release(&buffer);
1564 }
1565
1566 static int verify_merge_base(struct object_id *head_oid, struct ref *remote)
1567 {
1568 struct commit *head = lookup_commit_or_die(head_oid, "HEAD");
1569 struct commit *branch = lookup_commit_or_die(&remote->old_oid,
1570 remote->name);
1571
1572 return in_merge_bases(branch, head);
1573 }
1574
1575 static int delete_remote_branch(const char *pattern, int force)
1576 {
1577 struct ref *refs = remote_refs;
1578 struct ref *remote_ref = NULL;
1579 struct object_id head_oid;
1580 char *symref = NULL;
1581 int match;
1582 int patlen = strlen(pattern);
1583 int i;
1584 struct active_request_slot *slot;
1585 struct slot_results results;
1586 char *url;
1587
1588 /* Find the remote branch(es) matching the specified branch name */
1589 for (match = 0; refs; refs = refs->next) {
1590 char *name = refs->name;
1591 int namelen = strlen(name);
1592 if (namelen < patlen ||
1593 memcmp(name + namelen - patlen, pattern, patlen))
1594 continue;
1595 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1596 continue;
1597 match++;
1598 remote_ref = refs;
1599 }
1600 if (match == 0)
1601 return error("No remote branch matches %s", pattern);
1602 if (match != 1)
1603 return error("More than one remote branch matches %s",
1604 pattern);
1605
1606 /*
1607 * Remote HEAD must be a symref (not exactly foolproof; a remote
1608 * symlink to a symref will look like a symref)
1609 */
1610 fetch_symref("HEAD", &symref, &head_oid);
1611 if (!symref)
1612 return error("Remote HEAD is not a symref");
1613
1614 /* Remote branch must not be the remote HEAD */
1615 for (i = 0; symref && i < MAXDEPTH; i++) {
1616 if (!strcmp(remote_ref->name, symref))
1617 return error("Remote branch %s is the current HEAD",
1618 remote_ref->name);
1619 fetch_symref(symref, &symref, &head_oid);
1620 }
1621
1622 /* Run extra sanity checks if delete is not forced */
1623 if (!force) {
1624 /* Remote HEAD must resolve to a known object */
1625 if (symref)
1626 return error("Remote HEAD symrefs too deep");
1627 if (is_null_oid(&head_oid))
1628 return error("Unable to resolve remote HEAD");
1629 if (!has_object_file(&head_oid))
1630 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", oid_to_hex(&head_oid));
1631
1632 /* Remote branch must resolve to a known object */
1633 if (is_null_oid(&remote_ref->old_oid))
1634 return error("Unable to resolve remote branch %s",
1635 remote_ref->name);
1636 if (!has_object_file(&remote_ref->old_oid))
1637 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));
1638
1639 /* Remote branch must be an ancestor of remote HEAD */
1640 if (!verify_merge_base(&head_oid, remote_ref)) {
1641 return error("The branch '%s' is not an ancestor "
1642 "of your current HEAD.\n"
1643 "If you are sure you want to delete it,"
1644 " run:\n\t'git http-push -D %s %s'",
1645 remote_ref->name, repo->url, pattern);
1646 }
1647 }
1648
1649 /* Send delete request */
1650 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1651 if (dry_run)
1652 return 0;
1653 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1654 slot = get_active_slot();
1655 slot->results = &results;
1656 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1657 if (start_active_slot(slot)) {
1658 run_active_slot(slot);
1659 free(url);
1660 if (results.curl_result != CURLE_OK)
1661 return error("DELETE request failed (%d/%ld)",
1662 results.curl_result, results.http_code);
1663 } else {
1664 free(url);
1665 return error("Unable to start DELETE request");
1666 }
1667
1668 return 0;
1669 }
1670
1671 static void run_request_queue(void)
1672 {
1673 #ifdef USE_CURL_MULTI
1674 is_running_queue = 1;
1675 fill_active_slots();
1676 add_fill_function(NULL, fill_active_slot);
1677 #endif
1678 do {
1679 finish_all_active_slots();
1680 #ifdef USE_CURL_MULTI
1681 fill_active_slots();
1682 #endif
1683 } while (request_queue_head && !aborted);
1684
1685 #ifdef USE_CURL_MULTI
1686 is_running_queue = 0;
1687 #endif
1688 }
1689
1690 int cmd_main(int argc, const char **argv)
1691 {
1692 struct transfer_request *request;
1693 struct transfer_request *next_request;
1694 int nr_refspec = 0;
1695 const char **refspec = NULL;
1696 struct remote_lock *ref_lock = NULL;
1697 struct remote_lock *info_ref_lock = NULL;
1698 struct rev_info revs;
1699 int delete_branch = 0;
1700 int force_delete = 0;
1701 int objects_to_send;
1702 int rc = 0;
1703 int i;
1704 int new_refs;
1705 struct ref *ref, *local_refs;
1706
1707 repo = xcalloc(1, sizeof(*repo));
1708
1709 argv++;
1710 for (i = 1; i < argc; i++, argv++) {
1711 const char *arg = *argv;
1712
1713 if (*arg == '-') {
1714 if (!strcmp(arg, "--all")) {
1715 push_all = MATCH_REFS_ALL;
1716 continue;
1717 }
1718 if (!strcmp(arg, "--force")) {
1719 force_all = 1;
1720 continue;
1721 }
1722 if (!strcmp(arg, "--dry-run")) {
1723 dry_run = 1;
1724 continue;
1725 }
1726 if (!strcmp(arg, "--helper-status")) {
1727 helper_status = 1;
1728 continue;
1729 }
1730 if (!strcmp(arg, "--verbose")) {
1731 push_verbosely = 1;
1732 http_is_verbose = 1;
1733 continue;
1734 }
1735 if (!strcmp(arg, "-d")) {
1736 delete_branch = 1;
1737 continue;
1738 }
1739 if (!strcmp(arg, "-D")) {
1740 delete_branch = 1;
1741 force_delete = 1;
1742 continue;
1743 }
1744 if (!strcmp(arg, "-h"))
1745 usage(http_push_usage);
1746 }
1747 if (!repo->url) {
1748 char *path = strstr(arg, "//");
1749 str_end_url_with_slash(arg, &repo->url);
1750 repo->path_len = strlen(repo->url);
1751 if (path) {
1752 repo->path = strchr(path+2, '/');
1753 if (repo->path)
1754 repo->path_len = strlen(repo->path);
1755 }
1756 continue;
1757 }
1758 refspec = argv;
1759 nr_refspec = argc - i;
1760 break;
1761 }
1762
1763 #ifndef USE_CURL_MULTI
1764 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1765 #endif
1766
1767 if (!repo->url)
1768 usage(http_push_usage);
1769
1770 if (delete_branch && nr_refspec != 1)
1771 die("You must specify only one branch name when deleting a remote branch");
1772
1773 setup_git_directory();
1774
1775 memset(remote_dir_exists, -1, 256);
1776
1777 http_init(NULL, repo->url, 1);
1778
1779 #ifdef USE_CURL_MULTI
1780 is_running_queue = 0;
1781 #endif
1782
1783 /* Verify DAV compliance/lock support */
1784 if (!locking_available()) {
1785 rc = 1;
1786 goto cleanup;
1787 }
1788
1789 sigchain_push_common(remove_locks_on_signal);
1790
1791 /* Check whether the remote has server info files */
1792 repo->can_update_info_refs = 0;
1793 repo->has_info_refs = remote_exists("info/refs");
1794 repo->has_info_packs = remote_exists("objects/info/packs");
1795 if (repo->has_info_refs) {
1796 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1797 if (info_ref_lock)
1798 repo->can_update_info_refs = 1;
1799 else {
1800 error("cannot lock existing info/refs");
1801 rc = 1;
1802 goto cleanup;
1803 }
1804 }
1805 if (repo->has_info_packs)
1806 fetch_indices();
1807
1808 /* Get a list of all local and remote heads to validate refspecs */
1809 local_refs = get_local_heads();
1810 fprintf(stderr, "Fetching remote heads...\n");
1811 get_dav_remote_heads();
1812 run_request_queue();
1813
1814 /* Remove a remote branch if -d or -D was specified */
1815 if (delete_branch) {
1816 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1817 fprintf(stderr, "Unable to delete remote branch %s\n",
1818 refspec[0]);
1819 if (helper_status)
1820 printf("error %s cannot remove\n", refspec[0]);
1821 }
1822 goto cleanup;
1823 }
1824
1825 /* match them up */
1826 if (match_push_refs(local_refs, &remote_refs,
1827 nr_refspec, (const char **) refspec, push_all)) {
1828 rc = -1;
1829 goto cleanup;
1830 }
1831 if (!remote_refs) {
1832 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1833 if (helper_status)
1834 printf("error null no match\n");
1835 rc = 0;
1836 goto cleanup;
1837 }
1838
1839 new_refs = 0;
1840 for (ref = remote_refs; ref; ref = ref->next) {
1841 struct argv_array commit_argv = ARGV_ARRAY_INIT;
1842
1843 if (!ref->peer_ref)
1844 continue;
1845
1846 if (is_null_oid(&ref->peer_ref->new_oid)) {
1847 if (delete_remote_branch(ref->name, 1) == -1) {
1848 error("Could not remove %s", ref->name);
1849 if (helper_status)
1850 printf("error %s cannot remove\n", ref->name);
1851 rc = -4;
1852 }
1853 else if (helper_status)
1854 printf("ok %s\n", ref->name);
1855 new_refs++;
1856 continue;
1857 }
1858
1859 if (!oidcmp(&ref->old_oid, &ref->peer_ref->new_oid)) {
1860 if (push_verbosely)
1861 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1862 if (helper_status)
1863 printf("ok %s up to date\n", ref->name);
1864 continue;
1865 }
1866
1867 if (!force_all &&
1868 !is_null_oid(&ref->old_oid) &&
1869 !ref->force) {
1870 if (!has_object_file(&ref->old_oid) ||
1871 !ref_newer(&ref->peer_ref->new_oid,
1872 &ref->old_oid)) {
1873 /*
1874 * We do not have the remote ref, or
1875 * we know that the remote ref is not
1876 * an ancestor of what we are trying to
1877 * push. Either way this can be losing
1878 * commits at the remote end and likely
1879 * we were not up to date to begin with.
1880 */
1881 error("remote '%s' is not an ancestor of\n"
1882 "local '%s'.\n"
1883 "Maybe you are not up-to-date and "
1884 "need to pull first?",
1885 ref->name,
1886 ref->peer_ref->name);
1887 if (helper_status)
1888 printf("error %s non-fast forward\n", ref->name);
1889 rc = -2;
1890 continue;
1891 }
1892 }
1893 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1894 new_refs++;
1895
1896 fprintf(stderr, "updating '%s'", ref->name);
1897 if (strcmp(ref->name, ref->peer_ref->name))
1898 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1899 fprintf(stderr, "\n from %s\n to %s\n",
1900 oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
1901 if (dry_run) {
1902 if (helper_status)
1903 printf("ok %s\n", ref->name);
1904 continue;
1905 }
1906
1907 /* Lock remote branch ref */
1908 ref_lock = lock_remote(ref->name, LOCK_TIME);
1909 if (ref_lock == NULL) {
1910 fprintf(stderr, "Unable to lock remote branch %s\n",
1911 ref->name);
1912 if (helper_status)
1913 printf("error %s lock error\n", ref->name);
1914 rc = 1;
1915 continue;
1916 }
1917
1918 /* Set up revision info for this refspec */
1919 argv_array_push(&commit_argv, ""); /* ignored */
1920 argv_array_push(&commit_argv, "--objects");
1921 argv_array_push(&commit_argv, oid_to_hex(&ref->new_oid));
1922 if (!push_all && !is_null_oid(&ref->old_oid))
1923 argv_array_pushf(&commit_argv, "^%s",
1924 oid_to_hex(&ref->old_oid));
1925 init_revisions(&revs, setup_git_directory());
1926 setup_revisions(commit_argv.argc, commit_argv.argv, &revs, NULL);
1927 revs.edge_hint = 0; /* just in case */
1928
1929 /* Generate a list of objects that need to be pushed */
1930 pushing = 0;
1931 if (prepare_revision_walk(&revs))
1932 die("revision walk setup failed");
1933 mark_edges_uninteresting(&revs, NULL);
1934 objects_to_send = get_delta(&revs, ref_lock);
1935 finish_all_active_slots();
1936
1937 /* Push missing objects to remote, this would be a
1938 convenient time to pack them first if appropriate. */
1939 pushing = 1;
1940 if (objects_to_send)
1941 fprintf(stderr, " sending %d objects\n",
1942 objects_to_send);
1943
1944 run_request_queue();
1945
1946 /* Update the remote branch if all went well */
1947 if (aborted || !update_remote(ref->new_oid.hash, ref_lock))
1948 rc = 1;
1949
1950 if (!rc)
1951 fprintf(stderr, " done\n");
1952 if (helper_status)
1953 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1954 unlock_remote(ref_lock);
1955 check_locks();
1956 argv_array_clear(&commit_argv);
1957 }
1958
1959 /* Update remote server info if appropriate */
1960 if (repo->has_info_refs && new_refs) {
1961 if (info_ref_lock && repo->can_update_info_refs) {
1962 fprintf(stderr, "Updating remote server info\n");
1963 if (!dry_run)
1964 update_remote_info_refs(info_ref_lock);
1965 } else {
1966 fprintf(stderr, "Unable to update server info\n");
1967 }
1968 }
1969
1970 cleanup:
1971 if (info_ref_lock)
1972 unlock_remote(info_ref_lock);
1973 free(repo);
1974
1975 http_cleanup();
1976
1977 request = request_queue_head;
1978 while (request != NULL) {
1979 next_request = request->next;
1980 release_request(request);
1981 request = next_request;
1982 }
1983
1984 return rc;
1985 }
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