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reachable: use traverse_commit_list instead of custom walk
[alt-git.git] / http-push.c
blob952f8ede49daf4e275c42cc0682bb01c4c58446a
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
14 #ifdef EXPAT_NEEDS_XMLPARSE_H
15 #include <xmlparse.h>
16 #else
17 #include <expat.h>
18 #endif
19
20 static const char http_push_usage[] =
21 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
22
23 #ifndef XML_STATUS_OK
24 enum XML_Status {
25 XML_STATUS_OK = 1,
26 XML_STATUS_ERROR = 0
27 };
28 #define XML_STATUS_OK 1
29 #define XML_STATUS_ERROR 0
30 #endif
31
32 #define PREV_BUF_SIZE 4096
33
34 /* DAV methods */
35 #define DAV_LOCK "LOCK"
36 #define DAV_MKCOL "MKCOL"
37 #define DAV_MOVE "MOVE"
38 #define DAV_PROPFIND "PROPFIND"
39 #define DAV_PUT "PUT"
40 #define DAV_UNLOCK "UNLOCK"
41 #define DAV_DELETE "DELETE"
42
43 /* DAV lock flags */
44 #define DAV_PROP_LOCKWR (1u << 0)
45 #define DAV_PROP_LOCKEX (1u << 1)
46 #define DAV_LOCK_OK (1u << 2)
47
48 /* DAV XML properties */
49 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
50 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
51 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
52 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
53 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
54 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
55 #define DAV_PROPFIND_RESP ".multistatus.response"
56 #define DAV_PROPFIND_NAME ".multistatus.response.href"
57 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
58
59 /* DAV request body templates */
60 #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>"
61 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
62 #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>"
63
64 #define LOCK_TIME 600
65 #define LOCK_REFRESH 30
66
67 /* Remember to update object flag allocation in object.h */
68 #define LOCAL (1u<<16)
69 #define REMOTE (1u<<17)
70 #define FETCHING (1u<<18)
71 #define PUSHING (1u<<19)
72
73 /* We allow "recursive" symbolic refs. Only within reason, though */
74 #define MAXDEPTH 5
75
76 static int pushing;
77 static int aborted;
78 static signed char remote_dir_exists[256];
79
80 static int push_verbosely;
81 static int push_all = MATCH_REFS_NONE;
82 static int force_all;
83 static int dry_run;
84 static int helper_status;
85
86 static struct object_list *objects;
87
88 struct repo {
89 char *url;
90 char *path;
91 int path_len;
92 int has_info_refs;
93 int can_update_info_refs;
94 int has_info_packs;
95 struct packed_git *packs;
96 struct remote_lock *locks;
97 };
98
99 static struct repo *repo;
100
101 enum transfer_state {
102 NEED_FETCH,
103 RUN_FETCH_LOOSE,
104 RUN_FETCH_PACKED,
105 NEED_PUSH,
106 RUN_MKCOL,
107 RUN_PUT,
108 RUN_MOVE,
109 ABORTED,
110 COMPLETE
111 };
112
113 struct transfer_request {
114 struct object *obj;
115 char *url;
116 char *dest;
117 struct remote_lock *lock;
118 struct curl_slist *headers;
119 struct buffer buffer;
120 enum transfer_state state;
121 CURLcode curl_result;
122 char errorstr[CURL_ERROR_SIZE];
123 long http_code;
124 void *userData;
125 struct active_request_slot *slot;
126 struct transfer_request *next;
127 };
128
129 static struct transfer_request *request_queue_head;
130
131 struct xml_ctx {
132 char *name;
133 int len;
134 char *cdata;
135 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
136 void *userData;
137 };
138
139 struct remote_lock {
140 char *url;
141 char *owner;
142 char *token;
143 char tmpfile_suffix[41];
144 time_t start_time;
145 long timeout;
146 int refreshing;
147 struct remote_lock *next;
148 };
149
150 /* Flags that control remote_ls processing */
151 #define PROCESS_FILES (1u << 0)
152 #define PROCESS_DIRS (1u << 1)
153 #define RECURSIVE (1u << 2)
154
155 /* Flags that remote_ls passes to callback functions */
156 #define IS_DIR (1u << 0)
157
158 struct remote_ls_ctx {
159 char *path;
160 void (*userFunc)(struct remote_ls_ctx *ls);
161 void *userData;
162 int flags;
163 char *dentry_name;
164 int dentry_flags;
165 struct remote_ls_ctx *parent;
166 };
167
168 /* get_dav_token_headers options */
169 enum dav_header_flag {
170 DAV_HEADER_IF = (1u << 0),
171 DAV_HEADER_LOCK = (1u << 1),
172 DAV_HEADER_TIMEOUT = (1u << 2)
173 };
174
175 static char *xml_entities(const char *s)
176 {
177 struct strbuf buf = STRBUF_INIT;
178 strbuf_addstr_xml_quoted(&buf, s);
179 return strbuf_detach(&buf, NULL);
180 }
181
182 static void curl_setup_http_get(CURL *curl, const char *url,
183 const char *custom_req)
184 {
185 curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
186 curl_easy_setopt(curl, CURLOPT_URL, url);
187 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
188 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
189 }
190
191 static void curl_setup_http(CURL *curl, const char *url,
192 const char *custom_req, struct buffer *buffer,
193 curl_write_callback write_fn)
194 {
195 curl_easy_setopt(curl, CURLOPT_PUT, 1);
196 curl_easy_setopt(curl, CURLOPT_URL, url);
197 curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
198 curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
199 curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
200 #ifndef NO_CURL_IOCTL
201 curl_easy_setopt(curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
202 curl_easy_setopt(curl, CURLOPT_IOCTLDATA, buffer);
203 #endif
204 curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
205 curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
206 curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
207 curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
208 }
209
210 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
211 {
212 struct strbuf buf = STRBUF_INIT;
213 struct curl_slist *dav_headers = NULL;
214
215 if (options & DAV_HEADER_IF) {
216 strbuf_addf(&buf, "If: (<%s>)", lock->token);
217 dav_headers = curl_slist_append(dav_headers, buf.buf);
218 strbuf_reset(&buf);
219 }
220 if (options & DAV_HEADER_LOCK) {
221 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
222 dav_headers = curl_slist_append(dav_headers, buf.buf);
223 strbuf_reset(&buf);
224 }
225 if (options & DAV_HEADER_TIMEOUT) {
226 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
227 dav_headers = curl_slist_append(dav_headers, buf.buf);
228 strbuf_reset(&buf);
229 }
230 strbuf_release(&buf);
231
232 return dav_headers;
233 }
234
235 static void finish_request(struct transfer_request *request);
236 static void release_request(struct transfer_request *request);
237
238 static void process_response(void *callback_data)
239 {
240 struct transfer_request *request =
241 (struct transfer_request *)callback_data;
242
243 finish_request(request);
244 }
245
246 #ifdef USE_CURL_MULTI
247
248 static void start_fetch_loose(struct transfer_request *request)
249 {
250 struct active_request_slot *slot;
251 struct http_object_request *obj_req;
252
253 obj_req = new_http_object_request(repo->url, request->obj->sha1);
254 if (obj_req == NULL) {
255 request->state = ABORTED;
256 return;
257 }
258
259 slot = obj_req->slot;
260 slot->callback_func = process_response;
261 slot->callback_data = request;
262 request->slot = slot;
263 request->userData = obj_req;
264
265 /* Try to get the request started, abort the request on error */
266 request->state = RUN_FETCH_LOOSE;
267 if (!start_active_slot(slot)) {
268 fprintf(stderr, "Unable to start GET request\n");
269 repo->can_update_info_refs = 0;
270 release_http_object_request(obj_req);
271 release_request(request);
272 }
273 }
274
275 static void start_mkcol(struct transfer_request *request)
276 {
277 char *hex = sha1_to_hex(request->obj->sha1);
278 struct active_request_slot *slot;
279
280 request->url = get_remote_object_url(repo->url, hex, 1);
281
282 slot = get_active_slot();
283 slot->callback_func = process_response;
284 slot->callback_data = request;
285 curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
286 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
287
288 if (start_active_slot(slot)) {
289 request->slot = slot;
290 request->state = RUN_MKCOL;
291 } else {
292 request->state = ABORTED;
293 free(request->url);
294 request->url = NULL;
295 }
296 }
297 #endif
298
299 static void start_fetch_packed(struct transfer_request *request)
300 {
301 struct packed_git *target;
302
303 struct transfer_request *check_request = request_queue_head;
304 struct http_pack_request *preq;
305
306 target = find_sha1_pack(request->obj->sha1, repo->packs);
307 if (!target) {
308 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
309 repo->can_update_info_refs = 0;
310 release_request(request);
311 return;
312 }
313
314 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
315 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
316
317 preq = new_http_pack_request(target, repo->url);
318 if (preq == NULL) {
319 release_http_pack_request(preq);
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 = sha1_to_hex(request->obj->sha1);
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->sha1, &type, &len);
365 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
366
367 /* Set it up */
368 memset(&stream, 0, sizeof(stream));
369 git_deflate_init(&stream, zlib_compression_level);
370 size = git_deflate_bound(&stream, len + hdrlen);
371 strbuf_init(&request->buffer.buf, size);
372 request->buffer.posn = 0;
373
374 /* Compress it */
375 stream.next_out = (unsigned char *)request->buffer.buf.buf;
376 stream.avail_out = size;
377
378 /* First header.. */
379 stream.next_in = (void *)hdr;
380 stream.avail_in = hdrlen;
381 while (git_deflate(&stream, 0) == Z_OK)
382 ; /* nothing */
383
384 /* Then the data itself.. */
385 stream.next_in = unpacked;
386 stream.avail_in = len;
387 while (git_deflate(&stream, Z_FINISH) == Z_OK)
388 ; /* nothing */
389 git_deflate_end(&stream);
390 free(unpacked);
391
392 request->buffer.buf.len = stream.total_out;
393
394 strbuf_addstr(&buf, "Destination: ");
395 append_remote_object_url(&buf, repo->url, hex, 0);
396 request->dest = strbuf_detach(&buf, NULL);
397
398 append_remote_object_url(&buf, repo->url, hex, 0);
399 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
400 request->url = strbuf_detach(&buf, NULL);
401
402 slot = get_active_slot();
403 slot->callback_func = process_response;
404 slot->callback_data = request;
405 curl_setup_http(slot->curl, request->url, DAV_PUT,
406 &request->buffer, fwrite_null);
407
408 if (start_active_slot(slot)) {
409 request->slot = slot;
410 request->state = RUN_PUT;
411 } else {
412 request->state = ABORTED;
413 free(request->url);
414 request->url = NULL;
415 }
416 }
417
418 static void start_move(struct transfer_request *request)
419 {
420 struct active_request_slot *slot;
421 struct curl_slist *dav_headers = NULL;
422
423 slot = get_active_slot();
424 slot->callback_func = process_response;
425 slot->callback_data = request;
426 curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
427 dav_headers = curl_slist_append(dav_headers, request->dest);
428 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
429 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
430
431 if (start_active_slot(slot)) {
432 request->slot = slot;
433 request->state = RUN_MOVE;
434 } else {
435 request->state = ABORTED;
436 free(request->url);
437 request->url = NULL;
438 }
439 }
440
441 static int refresh_lock(struct remote_lock *lock)
442 {
443 struct active_request_slot *slot;
444 struct slot_results results;
445 struct curl_slist *dav_headers;
446 int rc = 0;
447
448 lock->refreshing = 1;
449
450 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
451
452 slot = get_active_slot();
453 slot->results = &results;
454 curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
455 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
456
457 if (start_active_slot(slot)) {
458 run_active_slot(slot);
459 if (results.curl_result != CURLE_OK) {
460 fprintf(stderr, "LOCK HTTP error %ld\n",
461 results.http_code);
462 } else {
463 lock->start_time = time(NULL);
464 rc = 1;
465 }
466 }
467
468 lock->refreshing = 0;
469 curl_slist_free_all(dav_headers);
470
471 return rc;
472 }
473
474 static void check_locks(void)
475 {
476 struct remote_lock *lock = repo->locks;
477 time_t current_time = time(NULL);
478 int time_remaining;
479
480 while (lock) {
481 time_remaining = lock->start_time + lock->timeout -
482 current_time;
483 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
484 if (!refresh_lock(lock)) {
485 fprintf(stderr,
486 "Unable to refresh lock for %s\n",
487 lock->url);
488 aborted = 1;
489 return;
490 }
491 }
492 lock = lock->next;
493 }
494 }
495
496 static void release_request(struct transfer_request *request)
497 {
498 struct transfer_request *entry = request_queue_head;
499
500 if (request == request_queue_head) {
501 request_queue_head = request->next;
502 } else {
503 while (entry->next != NULL && entry->next != request)
504 entry = entry->next;
505 if (entry->next == request)
506 entry->next = entry->next->next;
507 }
508
509 free(request->url);
510 free(request);
511 }
512
513 static void finish_request(struct transfer_request *request)
514 {
515 struct http_pack_request *preq;
516 struct http_object_request *obj_req;
517
518 request->curl_result = request->slot->curl_result;
519 request->http_code = request->slot->http_code;
520 request->slot = NULL;
521
522 /* Keep locks active */
523 check_locks();
524
525 if (request->headers != NULL)
526 curl_slist_free_all(request->headers);
527
528 /* URL is reused for MOVE after PUT */
529 if (request->state != RUN_PUT) {
530 free(request->url);
531 request->url = NULL;
532 }
533
534 if (request->state == RUN_MKCOL) {
535 if (request->curl_result == CURLE_OK ||
536 request->http_code == 405) {
537 remote_dir_exists[request->obj->sha1[0]] = 1;
538 start_put(request);
539 } else {
540 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
541 sha1_to_hex(request->obj->sha1),
542 request->curl_result, request->http_code);
543 request->state = ABORTED;
544 aborted = 1;
545 }
546 } else if (request->state == RUN_PUT) {
547 if (request->curl_result == CURLE_OK) {
548 start_move(request);
549 } else {
550 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
551 sha1_to_hex(request->obj->sha1),
552 request->curl_result, request->http_code);
553 request->state = ABORTED;
554 aborted = 1;
555 }
556 } else if (request->state == RUN_MOVE) {
557 if (request->curl_result == CURLE_OK) {
558 if (push_verbosely)
559 fprintf(stderr, " sent %s\n",
560 sha1_to_hex(request->obj->sha1));
561 request->obj->flags |= REMOTE;
562 release_request(request);
563 } else {
564 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
565 sha1_to_hex(request->obj->sha1),
566 request->curl_result, request->http_code);
567 request->state = ABORTED;
568 aborted = 1;
569 }
570 } else if (request->state == RUN_FETCH_LOOSE) {
571 obj_req = (struct http_object_request *)request->userData;
572
573 if (finish_http_object_request(obj_req) == 0)
574 if (obj_req->rename == 0)
575 request->obj->flags |= (LOCAL | REMOTE);
576
577 /* Try fetching packed if necessary */
578 if (request->obj->flags & LOCAL) {
579 release_http_object_request(obj_req);
580 release_request(request);
581 } else
582 start_fetch_packed(request);
583
584 } else if (request->state == RUN_FETCH_PACKED) {
585 int fail = 1;
586 if (request->curl_result != CURLE_OK) {
587 fprintf(stderr, "Unable to get pack file %s\n%s",
588 request->url, curl_errorstr);
589 } else {
590 preq = (struct http_pack_request *)request->userData;
591
592 if (preq) {
593 if (finish_http_pack_request(preq) == 0)
594 fail = 0;
595 release_http_pack_request(preq);
596 }
597 }
598 if (fail)
599 repo->can_update_info_refs = 0;
600 release_request(request);
601 }
602 }
603
604 #ifdef USE_CURL_MULTI
605 static int is_running_queue;
606 static int fill_active_slot(void *unused)
607 {
608 struct transfer_request *request;
609
610 if (aborted || !is_running_queue)
611 return 0;
612
613 for (request = request_queue_head; request; request = request->next) {
614 if (request->state == NEED_FETCH) {
615 start_fetch_loose(request);
616 return 1;
617 } else if (pushing && request->state == NEED_PUSH) {
618 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
619 start_put(request);
620 } else {
621 start_mkcol(request);
622 }
623 return 1;
624 }
625 }
626 return 0;
627 }
628 #endif
629
630 static void get_remote_object_list(unsigned char parent);
631
632 static void add_fetch_request(struct object *obj)
633 {
634 struct transfer_request *request;
635
636 check_locks();
637
638 /*
639 * Don't fetch the object if it's known to exist locally
640 * or is already in the request queue
641 */
642 if (remote_dir_exists[obj->sha1[0]] == -1)
643 get_remote_object_list(obj->sha1[0]);
644 if (obj->flags & (LOCAL | FETCHING))
645 return;
646
647 obj->flags |= FETCHING;
648 request = xmalloc(sizeof(*request));
649 request->obj = obj;
650 request->url = NULL;
651 request->lock = NULL;
652 request->headers = NULL;
653 request->state = NEED_FETCH;
654 request->next = request_queue_head;
655 request_queue_head = request;
656
657 #ifdef USE_CURL_MULTI
658 fill_active_slots();
659 step_active_slots();
660 #endif
661 }
662
663 static int add_send_request(struct object *obj, struct remote_lock *lock)
664 {
665 struct transfer_request *request;
666 struct packed_git *target;
667
668 /* Keep locks active */
669 check_locks();
670
671 /*
672 * Don't push the object if it's known to exist on the remote
673 * or is already in the request queue
674 */
675 if (remote_dir_exists[obj->sha1[0]] == -1)
676 get_remote_object_list(obj->sha1[0]);
677 if (obj->flags & (REMOTE | PUSHING))
678 return 0;
679 target = find_sha1_pack(obj->sha1, repo->packs);
680 if (target) {
681 obj->flags |= REMOTE;
682 return 0;
683 }
684
685 obj->flags |= PUSHING;
686 request = xmalloc(sizeof(*request));
687 request->obj = obj;
688 request->url = NULL;
689 request->lock = lock;
690 request->headers = NULL;
691 request->state = NEED_PUSH;
692 request->next = request_queue_head;
693 request_queue_head = request;
694
695 #ifdef USE_CURL_MULTI
696 fill_active_slots();
697 step_active_slots();
698 #endif
699
700 return 1;
701 }
702
703 static int fetch_indices(void)
704 {
705 int ret;
706
707 if (push_verbosely)
708 fprintf(stderr, "Getting pack list\n");
709
710 switch (http_get_info_packs(repo->url, &repo->packs)) {
711 case HTTP_OK:
712 case HTTP_MISSING_TARGET:
713 ret = 0;
714 break;
715 default:
716 ret = -1;
717 }
718
719 return ret;
720 }
721
722 static void one_remote_object(const unsigned char *sha1)
723 {
724 struct object *obj;
725
726 obj = lookup_object(sha1);
727 if (!obj)
728 obj = parse_object(sha1);
729
730 /* Ignore remote objects that don't exist locally */
731 if (!obj)
732 return;
733
734 obj->flags |= REMOTE;
735 if (!object_list_contains(objects, obj))
736 object_list_insert(obj, &objects);
737 }
738
739 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
740 {
741 int *lock_flags = (int *)ctx->userData;
742
743 if (tag_closed) {
744 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
745 if ((*lock_flags & DAV_PROP_LOCKEX) &&
746 (*lock_flags & DAV_PROP_LOCKWR)) {
747 *lock_flags |= DAV_LOCK_OK;
748 }
749 *lock_flags &= DAV_LOCK_OK;
750 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
751 *lock_flags |= DAV_PROP_LOCKWR;
752 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
753 *lock_flags |= DAV_PROP_LOCKEX;
754 }
755 }
756 }
757
758 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
759 {
760 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
761 git_SHA_CTX sha_ctx;
762 unsigned char lock_token_sha1[20];
763
764 if (tag_closed && ctx->cdata) {
765 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
766 lock->owner = xstrdup(ctx->cdata);
767 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
768 const char *arg;
769 if (skip_prefix(ctx->cdata, "Second-", &arg))
770 lock->timeout = strtol(arg, NULL, 10);
771 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
772 lock->token = xstrdup(ctx->cdata);
773
774 git_SHA1_Init(&sha_ctx);
775 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
776 git_SHA1_Final(lock_token_sha1, &sha_ctx);
777
778 lock->tmpfile_suffix[0] = '_';
779 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
780 }
781 }
782 }
783
784 static void one_remote_ref(const char *refname);
785
786 static void
787 xml_start_tag(void *userData, const char *name, const char **atts)
788 {
789 struct xml_ctx *ctx = (struct xml_ctx *)userData;
790 const char *c = strchr(name, ':');
791 int new_len;
792
793 if (c == NULL)
794 c = name;
795 else
796 c++;
797
798 new_len = strlen(ctx->name) + strlen(c) + 2;
799
800 if (new_len > ctx->len) {
801 ctx->name = xrealloc(ctx->name, new_len);
802 ctx->len = new_len;
803 }
804 strcat(ctx->name, ".");
805 strcat(ctx->name, c);
806
807 free(ctx->cdata);
808 ctx->cdata = NULL;
809
810 ctx->userFunc(ctx, 0);
811 }
812
813 static void
814 xml_end_tag(void *userData, const char *name)
815 {
816 struct xml_ctx *ctx = (struct xml_ctx *)userData;
817 const char *c = strchr(name, ':');
818 char *ep;
819
820 ctx->userFunc(ctx, 1);
821
822 if (c == NULL)
823 c = name;
824 else
825 c++;
826
827 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
828 *ep = 0;
829 }
830
831 static void
832 xml_cdata(void *userData, const XML_Char *s, int len)
833 {
834 struct xml_ctx *ctx = (struct xml_ctx *)userData;
835 free(ctx->cdata);
836 ctx->cdata = xmemdupz(s, len);
837 }
838
839 static struct remote_lock *lock_remote(const char *path, long timeout)
840 {
841 struct active_request_slot *slot;
842 struct slot_results results;
843 struct buffer out_buffer = { STRBUF_INIT, 0 };
844 struct strbuf in_buffer = STRBUF_INIT;
845 char *url;
846 char *ep;
847 char timeout_header[25];
848 struct remote_lock *lock = NULL;
849 struct curl_slist *dav_headers = NULL;
850 struct xml_ctx ctx;
851 char *escaped;
852
853 url = xstrfmt("%s%s", repo->url, path);
854
855 /* Make sure leading directories exist for the remote ref */
856 ep = strchr(url + strlen(repo->url) + 1, '/');
857 while (ep) {
858 char saved_character = ep[1];
859 ep[1] = '\0';
860 slot = get_active_slot();
861 slot->results = &results;
862 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
863 if (start_active_slot(slot)) {
864 run_active_slot(slot);
865 if (results.curl_result != CURLE_OK &&
866 results.http_code != 405) {
867 fprintf(stderr,
868 "Unable to create branch path %s\n",
869 url);
870 free(url);
871 return NULL;
872 }
873 } else {
874 fprintf(stderr, "Unable to start MKCOL request\n");
875 free(url);
876 return NULL;
877 }
878 ep[1] = saved_character;
879 ep = strchr(ep + 1, '/');
880 }
881
882 escaped = xml_entities(ident_default_email());
883 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
884 free(escaped);
885
886 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
887 dav_headers = curl_slist_append(dav_headers, timeout_header);
888 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
889
890 slot = get_active_slot();
891 slot->results = &results;
892 curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
893 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
894 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
895
896 lock = xcalloc(1, sizeof(*lock));
897 lock->timeout = -1;
898
899 if (start_active_slot(slot)) {
900 run_active_slot(slot);
901 if (results.curl_result == CURLE_OK) {
902 XML_Parser parser = XML_ParserCreate(NULL);
903 enum XML_Status result;
904 ctx.name = xcalloc(10, 1);
905 ctx.len = 0;
906 ctx.cdata = NULL;
907 ctx.userFunc = handle_new_lock_ctx;
908 ctx.userData = lock;
909 XML_SetUserData(parser, &ctx);
910 XML_SetElementHandler(parser, xml_start_tag,
911 xml_end_tag);
912 XML_SetCharacterDataHandler(parser, xml_cdata);
913 result = XML_Parse(parser, in_buffer.buf,
914 in_buffer.len, 1);
915 free(ctx.name);
916 if (result != XML_STATUS_OK) {
917 fprintf(stderr, "XML error: %s\n",
918 XML_ErrorString(
919 XML_GetErrorCode(parser)));
920 lock->timeout = -1;
921 }
922 XML_ParserFree(parser);
923 }
924 } else {
925 fprintf(stderr, "Unable to start LOCK request\n");
926 }
927
928 curl_slist_free_all(dav_headers);
929 strbuf_release(&out_buffer.buf);
930 strbuf_release(&in_buffer);
931
932 if (lock->token == NULL || lock->timeout <= 0) {
933 free(lock->token);
934 free(lock->owner);
935 free(url);
936 free(lock);
937 lock = NULL;
938 } else {
939 lock->url = url;
940 lock->start_time = time(NULL);
941 lock->next = repo->locks;
942 repo->locks = lock;
943 }
944
945 return lock;
946 }
947
948 static int unlock_remote(struct remote_lock *lock)
949 {
950 struct active_request_slot *slot;
951 struct slot_results results;
952 struct remote_lock *prev = repo->locks;
953 struct curl_slist *dav_headers;
954 int rc = 0;
955
956 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
957
958 slot = get_active_slot();
959 slot->results = &results;
960 curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
961 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
962
963 if (start_active_slot(slot)) {
964 run_active_slot(slot);
965 if (results.curl_result == CURLE_OK)
966 rc = 1;
967 else
968 fprintf(stderr, "UNLOCK HTTP error %ld\n",
969 results.http_code);
970 } else {
971 fprintf(stderr, "Unable to start UNLOCK request\n");
972 }
973
974 curl_slist_free_all(dav_headers);
975
976 if (repo->locks == lock) {
977 repo->locks = lock->next;
978 } else {
979 while (prev && prev->next != lock)
980 prev = prev->next;
981 if (prev)
982 prev->next = prev->next->next;
983 }
984
985 free(lock->owner);
986 free(lock->url);
987 free(lock->token);
988 free(lock);
989
990 return rc;
991 }
992
993 static void remove_locks(void)
994 {
995 struct remote_lock *lock = repo->locks;
996
997 fprintf(stderr, "Removing remote locks...\n");
998 while (lock) {
999 struct remote_lock *next = lock->next;
1000 unlock_remote(lock);
1001 lock = next;
1002 }
1003 }
1004
1005 static void remove_locks_on_signal(int signo)
1006 {
1007 remove_locks();
1008 sigchain_pop(signo);
1009 raise(signo);
1010 }
1011
1012 static void remote_ls(const char *path, int flags,
1013 void (*userFunc)(struct remote_ls_ctx *ls),
1014 void *userData);
1015
1016 /* extract hex from sharded "xx/x{40}" filename */
1017 static int get_sha1_hex_from_objpath(const char *path, unsigned char *sha1)
1018 {
1019 char hex[40];
1020
1021 if (strlen(path) != 41)
1022 return -1;
1023
1024 memcpy(hex, path, 2);
1025 path += 2;
1026 path++; /* skip '/' */
1027 memcpy(hex, path, 38);
1028
1029 return get_sha1_hex(hex, sha1);
1030 }
1031
1032 static void process_ls_object(struct remote_ls_ctx *ls)
1033 {
1034 unsigned int *parent = (unsigned int *)ls->userData;
1035 const char *path = ls->dentry_name;
1036 unsigned char sha1[20];
1037
1038 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1039 remote_dir_exists[*parent] = 1;
1040 return;
1041 }
1042
1043 if (!skip_prefix(path, "objects/", &path) ||
1044 get_sha1_hex_from_objpath(path, sha1))
1045 return;
1046
1047 one_remote_object(sha1);
1048 }
1049
1050 static void process_ls_ref(struct remote_ls_ctx *ls)
1051 {
1052 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1053 fprintf(stderr, " %s\n", ls->dentry_name);
1054 return;
1055 }
1056
1057 if (!(ls->dentry_flags & IS_DIR))
1058 one_remote_ref(ls->dentry_name);
1059 }
1060
1061 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1062 {
1063 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1064
1065 if (tag_closed) {
1066 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1067 if (ls->dentry_flags & IS_DIR) {
1068
1069 /* ensure collection names end with slash */
1070 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1071
1072 if (ls->flags & PROCESS_DIRS) {
1073 ls->userFunc(ls);
1074 }
1075 if (strcmp(ls->dentry_name, ls->path) &&
1076 ls->flags & RECURSIVE) {
1077 remote_ls(ls->dentry_name,
1078 ls->flags,
1079 ls->userFunc,
1080 ls->userData);
1081 }
1082 } else if (ls->flags & PROCESS_FILES) {
1083 ls->userFunc(ls);
1084 }
1085 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1086 char *path = ctx->cdata;
1087 if (*ctx->cdata == 'h') {
1088 path = strstr(path, "//");
1089 if (path) {
1090 path = strchr(path+2, '/');
1091 }
1092 }
1093 if (path) {
1094 const char *url = repo->url;
1095 if (repo->path)
1096 url = repo->path;
1097 if (strncmp(path, url, repo->path_len))
1098 error("Parsed path '%s' does not match url: '%s'",
1099 path, url);
1100 else {
1101 path += repo->path_len;
1102 ls->dentry_name = xstrdup(path);
1103 }
1104 }
1105 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1106 ls->dentry_flags |= IS_DIR;
1107 }
1108 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1109 free(ls->dentry_name);
1110 ls->dentry_name = NULL;
1111 ls->dentry_flags = 0;
1112 }
1113 }
1114
1115 /*
1116 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1117 * should _only_ heed the information from that file, instead of trying to
1118 * determine the refs from the remote file system (badly: it does not even
1119 * know about packed-refs).
1120 */
1121 static void remote_ls(const char *path, int flags,
1122 void (*userFunc)(struct remote_ls_ctx *ls),
1123 void *userData)
1124 {
1125 char *url = xstrfmt("%s%s", repo->url, path);
1126 struct active_request_slot *slot;
1127 struct slot_results results;
1128 struct strbuf in_buffer = STRBUF_INIT;
1129 struct buffer out_buffer = { STRBUF_INIT, 0 };
1130 struct curl_slist *dav_headers = NULL;
1131 struct xml_ctx ctx;
1132 struct remote_ls_ctx ls;
1133
1134 ls.flags = flags;
1135 ls.path = xstrdup(path);
1136 ls.dentry_name = NULL;
1137 ls.dentry_flags = 0;
1138 ls.userData = userData;
1139 ls.userFunc = userFunc;
1140
1141 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1142
1143 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1144 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1145
1146 slot = get_active_slot();
1147 slot->results = &results;
1148 curl_setup_http(slot->curl, url, DAV_PROPFIND,
1149 &out_buffer, fwrite_buffer);
1150 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1151 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1152
1153 if (start_active_slot(slot)) {
1154 run_active_slot(slot);
1155 if (results.curl_result == CURLE_OK) {
1156 XML_Parser parser = XML_ParserCreate(NULL);
1157 enum XML_Status result;
1158 ctx.name = xcalloc(10, 1);
1159 ctx.len = 0;
1160 ctx.cdata = NULL;
1161 ctx.userFunc = handle_remote_ls_ctx;
1162 ctx.userData = &ls;
1163 XML_SetUserData(parser, &ctx);
1164 XML_SetElementHandler(parser, xml_start_tag,
1165 xml_end_tag);
1166 XML_SetCharacterDataHandler(parser, xml_cdata);
1167 result = XML_Parse(parser, in_buffer.buf,
1168 in_buffer.len, 1);
1169 free(ctx.name);
1170
1171 if (result != XML_STATUS_OK) {
1172 fprintf(stderr, "XML error: %s\n",
1173 XML_ErrorString(
1174 XML_GetErrorCode(parser)));
1175 }
1176 XML_ParserFree(parser);
1177 }
1178 } else {
1179 fprintf(stderr, "Unable to start PROPFIND request\n");
1180 }
1181
1182 free(ls.path);
1183 free(url);
1184 strbuf_release(&out_buffer.buf);
1185 strbuf_release(&in_buffer);
1186 curl_slist_free_all(dav_headers);
1187 }
1188
1189 static void get_remote_object_list(unsigned char parent)
1190 {
1191 char path[] = "objects/XX/";
1192 static const char hex[] = "0123456789abcdef";
1193 unsigned int val = parent;
1194
1195 path[8] = hex[val >> 4];
1196 path[9] = hex[val & 0xf];
1197 remote_dir_exists[val] = 0;
1198 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1199 process_ls_object, &val);
1200 }
1201
1202 static int locking_available(void)
1203 {
1204 struct active_request_slot *slot;
1205 struct slot_results results;
1206 struct strbuf in_buffer = STRBUF_INIT;
1207 struct buffer out_buffer = { STRBUF_INIT, 0 };
1208 struct curl_slist *dav_headers = NULL;
1209 struct xml_ctx ctx;
1210 int lock_flags = 0;
1211 char *escaped;
1212
1213 escaped = xml_entities(repo->url);
1214 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1215 free(escaped);
1216
1217 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1218 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1219
1220 slot = get_active_slot();
1221 slot->results = &results;
1222 curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1223 &out_buffer, fwrite_buffer);
1224 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1225 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1226
1227 if (start_active_slot(slot)) {
1228 run_active_slot(slot);
1229 if (results.curl_result == CURLE_OK) {
1230 XML_Parser parser = XML_ParserCreate(NULL);
1231 enum XML_Status result;
1232 ctx.name = xcalloc(10, 1);
1233 ctx.len = 0;
1234 ctx.cdata = NULL;
1235 ctx.userFunc = handle_lockprop_ctx;
1236 ctx.userData = &lock_flags;
1237 XML_SetUserData(parser, &ctx);
1238 XML_SetElementHandler(parser, xml_start_tag,
1239 xml_end_tag);
1240 result = XML_Parse(parser, in_buffer.buf,
1241 in_buffer.len, 1);
1242 free(ctx.name);
1243
1244 if (result != XML_STATUS_OK) {
1245 fprintf(stderr, "XML error: %s\n",
1246 XML_ErrorString(
1247 XML_GetErrorCode(parser)));
1248 lock_flags = 0;
1249 }
1250 XML_ParserFree(parser);
1251 if (!lock_flags)
1252 error("no DAV locking support on %s",
1253 repo->url);
1254
1255 } else {
1256 error("Cannot access URL %s, return code %d",
1257 repo->url, results.curl_result);
1258 lock_flags = 0;
1259 }
1260 } else {
1261 error("Unable to start PROPFIND request on %s", repo->url);
1262 }
1263
1264 strbuf_release(&out_buffer.buf);
1265 strbuf_release(&in_buffer);
1266 curl_slist_free_all(dav_headers);
1267
1268 return lock_flags;
1269 }
1270
1271 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1272 {
1273 struct object_list *entry = xmalloc(sizeof(struct object_list));
1274 entry->item = obj;
1275 entry->next = *p;
1276 *p = entry;
1277 return &entry->next;
1278 }
1279
1280 static struct object_list **process_blob(struct blob *blob,
1281 struct object_list **p,
1282 struct name_path *path,
1283 const char *name)
1284 {
1285 struct object *obj = &blob->object;
1286
1287 obj->flags |= LOCAL;
1288
1289 if (obj->flags & (UNINTERESTING | SEEN))
1290 return p;
1291
1292 obj->flags |= SEEN;
1293 return add_one_object(obj, p);
1294 }
1295
1296 static struct object_list **process_tree(struct tree *tree,
1297 struct object_list **p,
1298 struct name_path *path,
1299 const char *name)
1300 {
1301 struct object *obj = &tree->object;
1302 struct tree_desc desc;
1303 struct name_entry entry;
1304 struct name_path me;
1305
1306 obj->flags |= LOCAL;
1307
1308 if (obj->flags & (UNINTERESTING | SEEN))
1309 return p;
1310 if (parse_tree(tree) < 0)
1311 die("bad tree object %s", sha1_to_hex(obj->sha1));
1312
1313 obj->flags |= SEEN;
1314 name = xstrdup(name);
1315 p = add_one_object(obj, p);
1316 me.up = path;
1317 me.elem = name;
1318 me.elem_len = strlen(name);
1319
1320 init_tree_desc(&desc, 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(entry.sha1), p, &me, name);
1326 break;
1327 case OBJ_BLOB:
1328 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1329 break;
1330 default:
1331 /* Subproject commit - not in this repository */
1332 break;
1333 }
1334
1335 free_tree_buffer(tree);
1336 return p;
1337 }
1338
1339 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1340 {
1341 int i;
1342 struct commit *commit;
1343 struct object_list **p = &objects;
1344 int count = 0;
1345
1346 while ((commit = get_revision(revs)) != NULL) {
1347 p = process_tree(commit->tree, p, NULL, "");
1348 commit->object.flags |= LOCAL;
1349 if (!(commit->object.flags & UNINTERESTING))
1350 count += add_send_request(&commit->object, lock);
1351 }
1352
1353 for (i = 0; i < revs->pending.nr; i++) {
1354 struct object_array_entry *entry = revs->pending.objects + i;
1355 struct object *obj = entry->item;
1356 const char *name = entry->name;
1357
1358 if (obj->flags & (UNINTERESTING | SEEN))
1359 continue;
1360 if (obj->type == OBJ_TAG) {
1361 obj->flags |= SEEN;
1362 p = add_one_object(obj, p);
1363 continue;
1364 }
1365 if (obj->type == OBJ_TREE) {
1366 p = process_tree((struct tree *)obj, p, NULL, name);
1367 continue;
1368 }
1369 if (obj->type == OBJ_BLOB) {
1370 p = process_blob((struct blob *)obj, p, NULL, name);
1371 continue;
1372 }
1373 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1374 }
1375
1376 while (objects) {
1377 if (!(objects->item->flags & UNINTERESTING))
1378 count += add_send_request(objects->item, lock);
1379 objects = objects->next;
1380 }
1381
1382 return count;
1383 }
1384
1385 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1386 {
1387 struct active_request_slot *slot;
1388 struct slot_results results;
1389 struct buffer out_buffer = { STRBUF_INIT, 0 };
1390 struct curl_slist *dav_headers;
1391
1392 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1393
1394 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1395
1396 slot = get_active_slot();
1397 slot->results = &results;
1398 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1399 &out_buffer, fwrite_null);
1400 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1401
1402 if (start_active_slot(slot)) {
1403 run_active_slot(slot);
1404 strbuf_release(&out_buffer.buf);
1405 if (results.curl_result != CURLE_OK) {
1406 fprintf(stderr,
1407 "PUT error: curl result=%d, HTTP code=%ld\n",
1408 results.curl_result, results.http_code);
1409 /* We should attempt recovery? */
1410 return 0;
1411 }
1412 } else {
1413 strbuf_release(&out_buffer.buf);
1414 fprintf(stderr, "Unable to start PUT request\n");
1415 return 0;
1416 }
1417
1418 return 1;
1419 }
1420
1421 static struct ref *remote_refs;
1422
1423 static void one_remote_ref(const char *refname)
1424 {
1425 struct ref *ref;
1426 struct object *obj;
1427
1428 ref = alloc_ref(refname);
1429
1430 if (http_fetch_ref(repo->url, ref) != 0) {
1431 fprintf(stderr,
1432 "Unable to fetch ref %s from %s\n",
1433 refname, repo->url);
1434 free(ref);
1435 return;
1436 }
1437
1438 /*
1439 * Fetch a copy of the object if it doesn't exist locally - it
1440 * may be required for updating server info later.
1441 */
1442 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1443 obj = lookup_unknown_object(ref->old_sha1);
1444 if (obj) {
1445 fprintf(stderr, " fetch %s for %s\n",
1446 sha1_to_hex(ref->old_sha1), refname);
1447 add_fetch_request(obj);
1448 }
1449 }
1450
1451 ref->next = remote_refs;
1452 remote_refs = ref;
1453 }
1454
1455 static void get_dav_remote_heads(void)
1456 {
1457 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1458 }
1459
1460 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1461 {
1462 struct strbuf *buf = (struct strbuf *)ls->userData;
1463 struct object *o;
1464 int len;
1465 char *ref_info;
1466 struct ref *ref;
1467
1468 ref = alloc_ref(ls->dentry_name);
1469
1470 if (http_fetch_ref(repo->url, ref) != 0) {
1471 fprintf(stderr,
1472 "Unable to fetch ref %s from %s\n",
1473 ls->dentry_name, repo->url);
1474 aborted = 1;
1475 free(ref);
1476 return;
1477 }
1478
1479 o = parse_object(ref->old_sha1);
1480 if (!o) {
1481 fprintf(stderr,
1482 "Unable to parse object %s for remote ref %s\n",
1483 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1484 aborted = 1;
1485 free(ref);
1486 return;
1487 }
1488
1489 len = strlen(ls->dentry_name) + 42;
1490 ref_info = xcalloc(len + 1, 1);
1491 sprintf(ref_info, "%s %s\n",
1492 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1493 fwrite_buffer(ref_info, 1, len, buf);
1494 free(ref_info);
1495
1496 if (o->type == OBJ_TAG) {
1497 o = deref_tag(o, ls->dentry_name, 0);
1498 if (o) {
1499 len = strlen(ls->dentry_name) + 45;
1500 ref_info = xcalloc(len + 1, 1);
1501 sprintf(ref_info, "%s %s^{}\n",
1502 sha1_to_hex(o->sha1), ls->dentry_name);
1503 fwrite_buffer(ref_info, 1, len, buf);
1504 free(ref_info);
1505 }
1506 }
1507 free(ref);
1508 }
1509
1510 static void update_remote_info_refs(struct remote_lock *lock)
1511 {
1512 struct buffer buffer = { STRBUF_INIT, 0 };
1513 struct active_request_slot *slot;
1514 struct slot_results results;
1515 struct curl_slist *dav_headers;
1516
1517 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1518 add_remote_info_ref, &buffer.buf);
1519 if (!aborted) {
1520 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1521
1522 slot = get_active_slot();
1523 slot->results = &results;
1524 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1525 &buffer, fwrite_null);
1526 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1527
1528 if (start_active_slot(slot)) {
1529 run_active_slot(slot);
1530 if (results.curl_result != CURLE_OK) {
1531 fprintf(stderr,
1532 "PUT error: curl result=%d, HTTP code=%ld\n",
1533 results.curl_result, results.http_code);
1534 }
1535 }
1536 }
1537 strbuf_release(&buffer.buf);
1538 }
1539
1540 static int remote_exists(const char *path)
1541 {
1542 char *url = xstrfmt("%s%s", repo->url, path);
1543 int ret;
1544
1545
1546 switch (http_get_strbuf(url, NULL, NULL)) {
1547 case HTTP_OK:
1548 ret = 1;
1549 break;
1550 case HTTP_MISSING_TARGET:
1551 ret = 0;
1552 break;
1553 case HTTP_ERROR:
1554 error("unable to access '%s': %s", url, curl_errorstr);
1555 default:
1556 ret = -1;
1557 }
1558 free(url);
1559 return ret;
1560 }
1561
1562 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1563 {
1564 char *url = xstrfmt("%s%s", repo->url, path);
1565 struct strbuf buffer = STRBUF_INIT;
1566 const char *name;
1567
1568 if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1569 die("Couldn't get %s for remote symref\n%s", url,
1570 curl_errorstr);
1571 free(url);
1572
1573 free(*symref);
1574 *symref = NULL;
1575 hashclr(sha1);
1576
1577 if (buffer.len == 0)
1578 return;
1579
1580 /* If it's a symref, set the refname; otherwise try for a sha1 */
1581 if (skip_prefix(buffer.buf, "ref: ", &name)) {
1582 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1583 } else {
1584 get_sha1_hex(buffer.buf, sha1);
1585 }
1586
1587 strbuf_release(&buffer);
1588 }
1589
1590 static int verify_merge_base(unsigned char *head_sha1, struct ref *remote)
1591 {
1592 struct commit *head = lookup_commit_or_die(head_sha1, "HEAD");
1593 struct commit *branch = lookup_commit_or_die(remote->old_sha1, remote->name);
1594
1595 return in_merge_bases(branch, head);
1596 }
1597
1598 static int delete_remote_branch(const char *pattern, int force)
1599 {
1600 struct ref *refs = remote_refs;
1601 struct ref *remote_ref = NULL;
1602 unsigned char head_sha1[20];
1603 char *symref = NULL;
1604 int match;
1605 int patlen = strlen(pattern);
1606 int i;
1607 struct active_request_slot *slot;
1608 struct slot_results results;
1609 char *url;
1610
1611 /* Find the remote branch(es) matching the specified branch name */
1612 for (match = 0; refs; refs = refs->next) {
1613 char *name = refs->name;
1614 int namelen = strlen(name);
1615 if (namelen < patlen ||
1616 memcmp(name + namelen - patlen, pattern, patlen))
1617 continue;
1618 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1619 continue;
1620 match++;
1621 remote_ref = refs;
1622 }
1623 if (match == 0)
1624 return error("No remote branch matches %s", pattern);
1625 if (match != 1)
1626 return error("More than one remote branch matches %s",
1627 pattern);
1628
1629 /*
1630 * Remote HEAD must be a symref (not exactly foolproof; a remote
1631 * symlink to a symref will look like a symref)
1632 */
1633 fetch_symref("HEAD", &symref, head_sha1);
1634 if (!symref)
1635 return error("Remote HEAD is not a symref");
1636
1637 /* Remote branch must not be the remote HEAD */
1638 for (i = 0; symref && i < MAXDEPTH; i++) {
1639 if (!strcmp(remote_ref->name, symref))
1640 return error("Remote branch %s is the current HEAD",
1641 remote_ref->name);
1642 fetch_symref(symref, &symref, head_sha1);
1643 }
1644
1645 /* Run extra sanity checks if delete is not forced */
1646 if (!force) {
1647 /* Remote HEAD must resolve to a known object */
1648 if (symref)
1649 return error("Remote HEAD symrefs too deep");
1650 if (is_null_sha1(head_sha1))
1651 return error("Unable to resolve remote HEAD");
1652 if (!has_sha1_file(head_sha1))
1653 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
1654
1655 /* Remote branch must resolve to a known object */
1656 if (is_null_sha1(remote_ref->old_sha1))
1657 return error("Unable to resolve remote branch %s",
1658 remote_ref->name);
1659 if (!has_sha1_file(remote_ref->old_sha1))
1660 return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, sha1_to_hex(remote_ref->old_sha1));
1661
1662 /* Remote branch must be an ancestor of remote HEAD */
1663 if (!verify_merge_base(head_sha1, remote_ref)) {
1664 return error("The branch '%s' is not an ancestor "
1665 "of your current HEAD.\n"
1666 "If you are sure you want to delete it,"
1667 " run:\n\t'git http-push -D %s %s'",
1668 remote_ref->name, repo->url, pattern);
1669 }
1670 }
1671
1672 /* Send delete request */
1673 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1674 if (dry_run)
1675 return 0;
1676 url = xstrfmt("%s%s", repo->url, remote_ref->name);
1677 slot = get_active_slot();
1678 slot->results = &results;
1679 curl_setup_http_get(slot->curl, url, DAV_DELETE);
1680 if (start_active_slot(slot)) {
1681 run_active_slot(slot);
1682 free(url);
1683 if (results.curl_result != CURLE_OK)
1684 return error("DELETE request failed (%d/%ld)",
1685 results.curl_result, results.http_code);
1686 } else {
1687 free(url);
1688 return error("Unable to start DELETE request");
1689 }
1690
1691 return 0;
1692 }
1693
1694 static void run_request_queue(void)
1695 {
1696 #ifdef USE_CURL_MULTI
1697 is_running_queue = 1;
1698 fill_active_slots();
1699 add_fill_function(NULL, fill_active_slot);
1700 #endif
1701 do {
1702 finish_all_active_slots();
1703 #ifdef USE_CURL_MULTI
1704 fill_active_slots();
1705 #endif
1706 } while (request_queue_head && !aborted);
1707
1708 #ifdef USE_CURL_MULTI
1709 is_running_queue = 0;
1710 #endif
1711 }
1712
1713 int main(int argc, char **argv)
1714 {
1715 struct transfer_request *request;
1716 struct transfer_request *next_request;
1717 int nr_refspec = 0;
1718 char **refspec = NULL;
1719 struct remote_lock *ref_lock = NULL;
1720 struct remote_lock *info_ref_lock = NULL;
1721 struct rev_info revs;
1722 int delete_branch = 0;
1723 int force_delete = 0;
1724 int objects_to_send;
1725 int rc = 0;
1726 int i;
1727 int new_refs;
1728 struct ref *ref, *local_refs;
1729
1730 git_setup_gettext();
1731
1732 git_extract_argv0_path(argv[0]);
1733
1734 repo = xcalloc(1, sizeof(*repo));
1735
1736 argv++;
1737 for (i = 1; i < argc; i++, argv++) {
1738 char *arg = *argv;
1739
1740 if (*arg == '-') {
1741 if (!strcmp(arg, "--all")) {
1742 push_all = MATCH_REFS_ALL;
1743 continue;
1744 }
1745 if (!strcmp(arg, "--force")) {
1746 force_all = 1;
1747 continue;
1748 }
1749 if (!strcmp(arg, "--dry-run")) {
1750 dry_run = 1;
1751 continue;
1752 }
1753 if (!strcmp(arg, "--helper-status")) {
1754 helper_status = 1;
1755 continue;
1756 }
1757 if (!strcmp(arg, "--verbose")) {
1758 push_verbosely = 1;
1759 http_is_verbose = 1;
1760 continue;
1761 }
1762 if (!strcmp(arg, "-d")) {
1763 delete_branch = 1;
1764 continue;
1765 }
1766 if (!strcmp(arg, "-D")) {
1767 delete_branch = 1;
1768 force_delete = 1;
1769 continue;
1770 }
1771 if (!strcmp(arg, "-h"))
1772 usage(http_push_usage);
1773 }
1774 if (!repo->url) {
1775 char *path = strstr(arg, "//");
1776 str_end_url_with_slash(arg, &repo->url);
1777 repo->path_len = strlen(repo->url);
1778 if (path) {
1779 repo->path = strchr(path+2, '/');
1780 if (repo->path)
1781 repo->path_len = strlen(repo->path);
1782 }
1783 continue;
1784 }
1785 refspec = argv;
1786 nr_refspec = argc - i;
1787 break;
1788 }
1789
1790 #ifndef USE_CURL_MULTI
1791 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
1792 #endif
1793
1794 if (!repo->url)
1795 usage(http_push_usage);
1796
1797 if (delete_branch && nr_refspec != 1)
1798 die("You must specify only one branch name when deleting a remote branch");
1799
1800 setup_git_directory();
1801
1802 memset(remote_dir_exists, -1, 256);
1803
1804 http_init(NULL, repo->url, 1);
1805
1806 #ifdef USE_CURL_MULTI
1807 is_running_queue = 0;
1808 #endif
1809
1810 /* Verify DAV compliance/lock support */
1811 if (!locking_available()) {
1812 rc = 1;
1813 goto cleanup;
1814 }
1815
1816 sigchain_push_common(remove_locks_on_signal);
1817
1818 /* Check whether the remote has server info files */
1819 repo->can_update_info_refs = 0;
1820 repo->has_info_refs = remote_exists("info/refs");
1821 repo->has_info_packs = remote_exists("objects/info/packs");
1822 if (repo->has_info_refs) {
1823 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1824 if (info_ref_lock)
1825 repo->can_update_info_refs = 1;
1826 else {
1827 error("cannot lock existing info/refs");
1828 rc = 1;
1829 goto cleanup;
1830 }
1831 }
1832 if (repo->has_info_packs)
1833 fetch_indices();
1834
1835 /* Get a list of all local and remote heads to validate refspecs */
1836 local_refs = get_local_heads();
1837 fprintf(stderr, "Fetching remote heads...\n");
1838 get_dav_remote_heads();
1839 run_request_queue();
1840
1841 /* Remove a remote branch if -d or -D was specified */
1842 if (delete_branch) {
1843 if (delete_remote_branch(refspec[0], force_delete) == -1) {
1844 fprintf(stderr, "Unable to delete remote branch %s\n",
1845 refspec[0]);
1846 if (helper_status)
1847 printf("error %s cannot remove\n", refspec[0]);
1848 }
1849 goto cleanup;
1850 }
1851
1852 /* match them up */
1853 if (match_push_refs(local_refs, &remote_refs,
1854 nr_refspec, (const char **) refspec, push_all)) {
1855 rc = -1;
1856 goto cleanup;
1857 }
1858 if (!remote_refs) {
1859 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1860 if (helper_status)
1861 printf("error null no match\n");
1862 rc = 0;
1863 goto cleanup;
1864 }
1865
1866 new_refs = 0;
1867 for (ref = remote_refs; ref; ref = ref->next) {
1868 char old_hex[60], *new_hex;
1869 const char *commit_argv[5];
1870 int commit_argc;
1871 char *new_sha1_hex, *old_sha1_hex;
1872
1873 if (!ref->peer_ref)
1874 continue;
1875
1876 if (is_null_sha1(ref->peer_ref->new_sha1)) {
1877 if (delete_remote_branch(ref->name, 1) == -1) {
1878 error("Could not remove %s", ref->name);
1879 if (helper_status)
1880 printf("error %s cannot remove\n", ref->name);
1881 rc = -4;
1882 }
1883 else if (helper_status)
1884 printf("ok %s\n", ref->name);
1885 new_refs++;
1886 continue;
1887 }
1888
1889 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
1890 if (push_verbosely)
1891 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1892 if (helper_status)
1893 printf("ok %s up to date\n", ref->name);
1894 continue;
1895 }
1896
1897 if (!force_all &&
1898 !is_null_sha1(ref->old_sha1) &&
1899 !ref->force) {
1900 if (!has_sha1_file(ref->old_sha1) ||
1901 !ref_newer(ref->peer_ref->new_sha1,
1902 ref->old_sha1)) {
1903 /*
1904 * We do not have the remote ref, or
1905 * we know that the remote ref is not
1906 * an ancestor of what we are trying to
1907 * push. Either way this can be losing
1908 * commits at the remote end and likely
1909 * we were not up to date to begin with.
1910 */
1911 error("remote '%s' is not an ancestor of\n"
1912 "local '%s'.\n"
1913 "Maybe you are not up-to-date and "
1914 "need to pull first?",
1915 ref->name,
1916 ref->peer_ref->name);
1917 if (helper_status)
1918 printf("error %s non-fast forward\n", ref->name);
1919 rc = -2;
1920 continue;
1921 }
1922 }
1923 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
1924 new_refs++;
1925 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
1926 new_hex = sha1_to_hex(ref->new_sha1);
1927
1928 fprintf(stderr, "updating '%s'", ref->name);
1929 if (strcmp(ref->name, ref->peer_ref->name))
1930 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1931 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
1932 if (dry_run) {
1933 if (helper_status)
1934 printf("ok %s\n", ref->name);
1935 continue;
1936 }
1937
1938 /* Lock remote branch ref */
1939 ref_lock = lock_remote(ref->name, LOCK_TIME);
1940 if (ref_lock == NULL) {
1941 fprintf(stderr, "Unable to lock remote branch %s\n",
1942 ref->name);
1943 if (helper_status)
1944 printf("error %s lock error\n", ref->name);
1945 rc = 1;
1946 continue;
1947 }
1948
1949 /* Set up revision info for this refspec */
1950 commit_argc = 3;
1951 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
1952 old_sha1_hex = NULL;
1953 commit_argv[1] = "--objects";
1954 commit_argv[2] = new_sha1_hex;
1955 if (!push_all && !is_null_sha1(ref->old_sha1)) {
1956 old_sha1_hex = xmalloc(42);
1957 sprintf(old_sha1_hex, "^%s",
1958 sha1_to_hex(ref->old_sha1));
1959 commit_argv[3] = old_sha1_hex;
1960 commit_argc++;
1961 }
1962 commit_argv[commit_argc] = NULL;
1963 init_revisions(&revs, setup_git_directory());
1964 setup_revisions(commit_argc, commit_argv, &revs, NULL);
1965 revs.edge_hint = 0; /* just in case */
1966 free(new_sha1_hex);
1967 if (old_sha1_hex) {
1968 free(old_sha1_hex);
1969 commit_argv[1] = NULL;
1970 }
1971
1972 /* Generate a list of objects that need to be pushed */
1973 pushing = 0;
1974 if (prepare_revision_walk(&revs))
1975 die("revision walk setup failed");
1976 mark_edges_uninteresting(&revs, NULL);
1977 objects_to_send = get_delta(&revs, ref_lock);
1978 finish_all_active_slots();
1979
1980 /* Push missing objects to remote, this would be a
1981 convenient time to pack them first if appropriate. */
1982 pushing = 1;
1983 if (objects_to_send)
1984 fprintf(stderr, " sending %d objects\n",
1985 objects_to_send);
1986
1987 run_request_queue();
1988
1989 /* Update the remote branch if all went well */
1990 if (aborted || !update_remote(ref->new_sha1, ref_lock))
1991 rc = 1;
1992
1993 if (!rc)
1994 fprintf(stderr, " done\n");
1995 if (helper_status)
1996 printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1997 unlock_remote(ref_lock);
1998 check_locks();
1999 }
2000
2001 /* Update remote server info if appropriate */
2002 if (repo->has_info_refs && new_refs) {
2003 if (info_ref_lock && repo->can_update_info_refs) {
2004 fprintf(stderr, "Updating remote server info\n");
2005 if (!dry_run)
2006 update_remote_info_refs(info_ref_lock);
2007 } else {
2008 fprintf(stderr, "Unable to update server info\n");
2009 }
2010 }
2011
2012 cleanup:
2013 if (info_ref_lock)
2014 unlock_remote(info_ref_lock);
2015 free(repo);
2016
2017 http_cleanup();
2018
2019 request = request_queue_head;
2020 while (request != NULL) {
2021 next_request = request->next;
2022 release_request(request);
2023 request = next_request;
2024 }
2025
2026 return rc;
2027 }
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