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http-push: fix revision walk
[git.git] / http-push.c
blob4c1b0c3039a84c4c786a09ba70a84df46f995186
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "fetch.h"
5 #include "tag.h"
6 #include "blob.h"
7 #include "http.h"
8 #include "refs.h"
9 #include "revision.h"
10
11 #include <expat.h>
12
13 static const char http_push_usage[] =
14 "git-http-push [--complete] [--force] [--verbose] <url> <ref> [<ref>...]\n";
15
16 #ifndef XML_STATUS_OK
17 enum XML_Status {
18 XML_STATUS_OK = 1,
19 XML_STATUS_ERROR = 0
20 };
21 #define XML_STATUS_OK 1
22 #define XML_STATUS_ERROR 0
23 #endif
24
25 #define RANGE_HEADER_SIZE 30
26
27 /* DAV methods */
28 #define DAV_LOCK "LOCK"
29 #define DAV_MKCOL "MKCOL"
30 #define DAV_MOVE "MOVE"
31 #define DAV_PROPFIND "PROPFIND"
32 #define DAV_PUT "PUT"
33 #define DAV_UNLOCK "UNLOCK"
34
35 /* DAV lock flags */
36 #define DAV_PROP_LOCKWR (1u << 0)
37 #define DAV_PROP_LOCKEX (1u << 1)
38 #define DAV_LOCK_OK (1u << 2)
39
40 /* DAV XML properties */
41 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
42 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
43 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
44 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
45 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
46 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
47 #define DAV_PROPFIND_RESP ".multistatus.response"
48 #define DAV_PROPFIND_NAME ".multistatus.response.href"
49 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
50
51 /* DAV request body templates */
52 #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>"
53 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
54 #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>"
55
56 #define LOCK_TIME 600
57 #define LOCK_REFRESH 30
58
59 /* bits #0-4 in revision.h */
60
61 #define LOCAL (1u << 5)
62 #define REMOTE (1u << 6)
63 #define PUSHING (1u << 7)
64
65 static int pushing = 0;
66 static int aborted = 0;
67 static char remote_dir_exists[256];
68
69 static struct curl_slist *no_pragma_header;
70 static struct curl_slist *default_headers;
71
72 static int push_verbosely = 0;
73 static int push_all = 0;
74 static int force_all = 0;
75
76 static struct object_list *objects = NULL;
77
78 struct repo
79 {
80 char *url;
81 int path_len;
82 struct packed_git *packs;
83 };
84
85 static struct repo *remote = NULL;
86 static struct remote_lock *remote_locks = NULL;
87
88 enum transfer_state {
89 NEED_PUSH,
90 RUN_MKCOL,
91 RUN_PUT,
92 RUN_MOVE,
93 ABORTED,
94 COMPLETE,
95 };
96
97 struct transfer_request
98 {
99 struct object *obj;
100 char *url;
101 char *dest;
102 struct remote_lock *lock;
103 struct curl_slist *headers;
104 struct buffer buffer;
105 char filename[PATH_MAX];
106 char tmpfile[PATH_MAX];
107 enum transfer_state state;
108 CURLcode curl_result;
109 char errorstr[CURL_ERROR_SIZE];
110 long http_code;
111 unsigned char real_sha1[20];
112 SHA_CTX c;
113 z_stream stream;
114 int zret;
115 int rename;
116 struct active_request_slot *slot;
117 struct transfer_request *next;
118 };
119
120 static struct transfer_request *request_queue_head = NULL;
121
122 struct xml_ctx
123 {
124 char *name;
125 int len;
126 char *cdata;
127 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
128 void *userData;
129 };
130
131 struct remote_lock
132 {
133 char *url;
134 char *owner;
135 char *token;
136 time_t start_time;
137 long timeout;
138 int active;
139 int refreshing;
140 struct remote_lock *next;
141 };
142
143 struct remote_dentry
144 {
145 char *base;
146 char *name;
147 int is_dir;
148 };
149
150 static void finish_request(struct transfer_request *request);
151
152 static void process_response(void *callback_data)
153 {
154 struct transfer_request *request =
155 (struct transfer_request *)callback_data;
156
157 finish_request(request);
158 }
159
160 static void start_mkcol(struct transfer_request *request)
161 {
162 char *hex = sha1_to_hex(request->obj->sha1);
163 struct active_request_slot *slot;
164 char *posn;
165
166 request->url = xmalloc(strlen(remote->url) + 13);
167 strcpy(request->url, remote->url);
168 posn = request->url + strlen(remote->url);
169 strcpy(posn, "objects/");
170 posn += 8;
171 memcpy(posn, hex, 2);
172 posn += 2;
173 strcpy(posn, "/");
174
175 slot = get_active_slot();
176 slot->callback_func = process_response;
177 slot->callback_data = request;
178 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
179 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
180 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
181 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
182 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
183
184 if (start_active_slot(slot)) {
185 request->slot = slot;
186 request->state = RUN_MKCOL;
187 } else {
188 request->state = ABORTED;
189 free(request->url);
190 request->url = NULL;
191 }
192 }
193
194 static void start_put(struct transfer_request *request)
195 {
196 char *hex = sha1_to_hex(request->obj->sha1);
197 struct active_request_slot *slot;
198 char *posn;
199 char type[20];
200 char hdr[50];
201 void *unpacked;
202 unsigned long len;
203 int hdrlen;
204 ssize_t size;
205 z_stream stream;
206
207 unpacked = read_sha1_file(request->obj->sha1, type, &len);
208 hdrlen = sprintf(hdr, "%s %lu", type, len) + 1;
209
210 /* Set it up */
211 memset(&stream, 0, sizeof(stream));
212 deflateInit(&stream, Z_BEST_COMPRESSION);
213 size = deflateBound(&stream, len + hdrlen);
214 request->buffer.buffer = xmalloc(size);
215
216 /* Compress it */
217 stream.next_out = request->buffer.buffer;
218 stream.avail_out = size;
219
220 /* First header.. */
221 stream.next_in = (void *)hdr;
222 stream.avail_in = hdrlen;
223 while (deflate(&stream, 0) == Z_OK)
224 /* nothing */;
225
226 /* Then the data itself.. */
227 stream.next_in = unpacked;
228 stream.avail_in = len;
229 while (deflate(&stream, Z_FINISH) == Z_OK)
230 /* nothing */;
231 deflateEnd(&stream);
232 free(unpacked);
233
234 request->buffer.size = stream.total_out;
235 request->buffer.posn = 0;
236
237 request->url = xmalloc(strlen(remote->url) +
238 strlen(request->lock->token) + 51);
239 strcpy(request->url, remote->url);
240 posn = request->url + strlen(remote->url);
241 strcpy(posn, "objects/");
242 posn += 8;
243 memcpy(posn, hex, 2);
244 posn += 2;
245 *(posn++) = '/';
246 strcpy(posn, hex + 2);
247 request->dest = xmalloc(strlen(request->url) + 14);
248 sprintf(request->dest, "Destination: %s", request->url);
249 posn += 38;
250 *(posn++) = '.';
251 strcpy(posn, request->lock->token);
252
253 slot = get_active_slot();
254 slot->callback_func = process_response;
255 slot->callback_data = request;
256 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
257 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.size);
258 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
259 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
260 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
261 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
262 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
263 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
264 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
265
266 if (start_active_slot(slot)) {
267 request->slot = slot;
268 request->state = RUN_PUT;
269 } else {
270 request->state = ABORTED;
271 free(request->url);
272 request->url = NULL;
273 }
274 }
275
276 static void start_move(struct transfer_request *request)
277 {
278 struct active_request_slot *slot;
279 struct curl_slist *dav_headers = NULL;
280
281 slot = get_active_slot();
282 slot->callback_func = process_response;
283 slot->callback_data = request;
284 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
285 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
286 dav_headers = curl_slist_append(dav_headers, request->dest);
287 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
288 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
289 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
290 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
291
292 if (start_active_slot(slot)) {
293 request->slot = slot;
294 request->state = RUN_MOVE;
295 } else {
296 request->state = ABORTED;
297 free(request->url);
298 request->url = NULL;
299 }
300 }
301
302 static int refresh_lock(struct remote_lock *check_lock)
303 {
304 struct active_request_slot *slot;
305 char *if_header;
306 char timeout_header[25];
307 struct curl_slist *dav_headers = NULL;
308 struct remote_lock *lock;
309 int time_remaining;
310 time_t current_time;
311
312 /* Refresh all active locks if they're close to expiring */
313 for (lock = remote_locks; lock; lock = lock->next) {
314 if (!lock->active)
315 continue;
316
317 current_time = time(NULL);
318 time_remaining = lock->start_time + lock->timeout
319 - current_time;
320 if (time_remaining > LOCK_REFRESH)
321 continue;
322
323 lock->refreshing = 1;
324
325 if_header = xmalloc(strlen(lock->token) + 25);
326 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
327 sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
328 dav_headers = curl_slist_append(dav_headers, if_header);
329 dav_headers = curl_slist_append(dav_headers, timeout_header);
330
331 slot = get_active_slot();
332 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
333 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
334 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
335 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
336 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
337
338 if (start_active_slot(slot)) {
339 run_active_slot(slot);
340 if (slot->curl_result != CURLE_OK) {
341 fprintf(stderr, "Got HTTP error %ld\n", slot->http_code);
342 lock->active = 0;
343 } else {
344 lock->active = 1;
345 lock->start_time = time(NULL);
346 }
347 }
348
349 lock->refreshing = 0;
350 curl_slist_free_all(dav_headers);
351 free(if_header);
352 }
353
354 if (check_lock)
355 return check_lock->active;
356 else
357 return 0;
358 }
359
360 static void release_request(struct transfer_request *request)
361 {
362 struct transfer_request *entry = request_queue_head;
363
364 if (request == request_queue_head) {
365 request_queue_head = request->next;
366 } else {
367 while (entry->next != NULL && entry->next != request)
368 entry = entry->next;
369 if (entry->next == request)
370 entry->next = entry->next->next;
371 }
372
373 if (request->url != NULL)
374 free(request->url);
375 free(request);
376 }
377
378 static void finish_request(struct transfer_request *request)
379 {
380 request->curl_result = request->slot->curl_result;
381 request->http_code = request->slot->http_code;
382 request->slot = NULL;
383
384 /* Keep locks active */
385 refresh_lock(request->lock);
386
387 if (request->headers != NULL)
388 curl_slist_free_all(request->headers);
389
390 /* URL is reused for MOVE after PUT */
391 if (request->state != RUN_PUT) {
392 free(request->url);
393 request->url = NULL;
394 }
395
396 if (request->state == RUN_MKCOL) {
397 if (request->curl_result == CURLE_OK ||
398 request->http_code == 405) {
399 remote_dir_exists[request->obj->sha1[0]] = 1;
400 start_put(request);
401 } else {
402 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
403 sha1_to_hex(request->obj->sha1),
404 request->curl_result, request->http_code);
405 request->state = ABORTED;
406 aborted = 1;
407 }
408 } else if (request->state == RUN_PUT) {
409 if (request->curl_result == CURLE_OK) {
410 start_move(request);
411 } else {
412 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
413 sha1_to_hex(request->obj->sha1),
414 request->curl_result, request->http_code);
415 request->state = ABORTED;
416 aborted = 1;
417 }
418 } else if (request->state == RUN_MOVE) {
419 if (request->curl_result == CURLE_OK) {
420 fprintf(stderr, " sent %s\n",
421 sha1_to_hex(request->obj->sha1));
422 request->state = COMPLETE;
423 request->obj->flags |= REMOTE;
424 release_request(request);
425 } else {
426 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
427 sha1_to_hex(request->obj->sha1),
428 request->curl_result, request->http_code);
429 request->state = ABORTED;
430 aborted = 1;
431 }
432 }
433 }
434
435 void fill_active_slots(void)
436 {
437 struct transfer_request *request = request_queue_head;
438 struct active_request_slot *slot = active_queue_head;
439 int num_transfers;
440
441 if (aborted)
442 return;
443
444 while (active_requests < max_requests && request != NULL) {
445 if (pushing && request->state == NEED_PUSH) {
446 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
447 start_put(request);
448 } else {
449 start_mkcol(request);
450 }
451 curl_multi_perform(curlm, &num_transfers);
452 }
453 request = request->next;
454 }
455
456 while (slot != NULL) {
457 if (!slot->in_use && slot->curl != NULL) {
458 curl_easy_cleanup(slot->curl);
459 slot->curl = NULL;
460 }
461 slot = slot->next;
462 }
463 }
464
465 static void get_remote_object_list(unsigned char parent);
466
467 static void add_request(struct object *obj, struct remote_lock *lock)
468 {
469 struct transfer_request *request = request_queue_head;
470 struct packed_git *target;
471
472 /*
473 * Don't push the object if it's known to exist on the remote
474 * or is already in the request queue
475 */
476 if (remote_dir_exists[obj->sha1[0]] == -1)
477 get_remote_object_list(obj->sha1[0]);
478 if (obj->flags & (REMOTE | PUSHING))
479 return;
480 target = find_sha1_pack(obj->sha1, remote->packs);
481 if (target) {
482 obj->flags |= REMOTE;
483 return;
484 }
485
486 obj->flags |= PUSHING;
487 request = xmalloc(sizeof(*request));
488 request->obj = obj;
489 request->url = NULL;
490 request->lock = lock;
491 request->headers = NULL;
492 request->state = NEED_PUSH;
493 request->next = request_queue_head;
494 request_queue_head = request;
495
496 fill_active_slots();
497 step_active_slots();
498 }
499
500 static int fetch_index(unsigned char *sha1)
501 {
502 char *hex = sha1_to_hex(sha1);
503 char *filename;
504 char *url;
505 char tmpfile[PATH_MAX];
506 long prev_posn = 0;
507 char range[RANGE_HEADER_SIZE];
508 struct curl_slist *range_header = NULL;
509
510 FILE *indexfile;
511 struct active_request_slot *slot;
512
513 /* Don't use the index if the pack isn't there */
514 url = xmalloc(strlen(remote->url) + 65);
515 sprintf(url, "%s/objects/pack/pack-%s.pack", remote->url, hex);
516 slot = get_active_slot();
517 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
518 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
519 if (start_active_slot(slot)) {
520 run_active_slot(slot);
521 if (slot->curl_result != CURLE_OK) {
522 free(url);
523 return error("Unable to verify pack %s is available",
524 hex);
525 }
526 } else {
527 return error("Unable to start request");
528 }
529
530 if (has_pack_index(sha1))
531 return 0;
532
533 if (push_verbosely)
534 fprintf(stderr, "Getting index for pack %s\n", hex);
535
536 sprintf(url, "%s/objects/pack/pack-%s.idx", remote->url, hex);
537
538 filename = sha1_pack_index_name(sha1);
539 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
540 indexfile = fopen(tmpfile, "a");
541 if (!indexfile)
542 return error("Unable to open local file %s for pack index",
543 filename);
544
545 slot = get_active_slot();
546 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
547 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
548 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
549 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
550 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
551 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
552 slot->local = indexfile;
553
554 /* If there is data present from a previous transfer attempt,
555 resume where it left off */
556 prev_posn = ftell(indexfile);
557 if (prev_posn>0) {
558 if (push_verbosely)
559 fprintf(stderr,
560 "Resuming fetch of index for pack %s at byte %ld\n",
561 hex, prev_posn);
562 sprintf(range, "Range: bytes=%ld-", prev_posn);
563 range_header = curl_slist_append(range_header, range);
564 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
565 }
566
567 if (start_active_slot(slot)) {
568 run_active_slot(slot);
569 if (slot->curl_result != CURLE_OK) {
570 free(url);
571 fclose(indexfile);
572 return error("Unable to get pack index %s\n%s", url,
573 curl_errorstr);
574 }
575 } else {
576 free(url);
577 fclose(indexfile);
578 return error("Unable to start request");
579 }
580
581 free(url);
582 fclose(indexfile);
583
584 return move_temp_to_file(tmpfile, filename);
585 }
586
587 static int setup_index(unsigned char *sha1)
588 {
589 struct packed_git *new_pack;
590
591 if (fetch_index(sha1))
592 return -1;
593
594 new_pack = parse_pack_index(sha1);
595 new_pack->next = remote->packs;
596 remote->packs = new_pack;
597 return 0;
598 }
599
600 static int fetch_indices(void)
601 {
602 unsigned char sha1[20];
603 char *url;
604 struct buffer buffer;
605 char *data;
606 int i = 0;
607
608 struct active_request_slot *slot;
609
610 data = xmalloc(4096);
611 memset(data, 0, 4096);
612 buffer.size = 4096;
613 buffer.posn = 0;
614 buffer.buffer = data;
615
616 if (push_verbosely)
617 fprintf(stderr, "Getting pack list\n");
618
619 url = xmalloc(strlen(remote->url) + 21);
620 sprintf(url, "%s/objects/info/packs", remote->url);
621
622 slot = get_active_slot();
623 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
624 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
625 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
626 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
627 if (start_active_slot(slot)) {
628 run_active_slot(slot);
629 if (slot->curl_result != CURLE_OK) {
630 free(buffer.buffer);
631 free(url);
632 if (slot->http_code == 404)
633 return 0;
634 else
635 return error("%s", curl_errorstr);
636 }
637 } else {
638 free(buffer.buffer);
639 free(url);
640 return error("Unable to start request");
641 }
642 free(url);
643
644 data = buffer.buffer;
645 while (i < buffer.posn) {
646 switch (data[i]) {
647 case 'P':
648 i++;
649 if (i + 52 < buffer.posn &&
650 !strncmp(data + i, " pack-", 6) &&
651 !strncmp(data + i + 46, ".pack\n", 6)) {
652 get_sha1_hex(data + i + 6, sha1);
653 setup_index(sha1);
654 i += 51;
655 break;
656 }
657 default:
658 while (data[i] != '\n')
659 i++;
660 }
661 i++;
662 }
663
664 free(buffer.buffer);
665 return 0;
666 }
667
668 static inline int needs_quote(int ch)
669 {
670 switch (ch) {
671 case '/': case '-': case '.':
672 case 'A'...'Z': case 'a'...'z': case '0'...'9':
673 return 0;
674 default:
675 return 1;
676 }
677 }
678
679 static inline int hex(int v)
680 {
681 if (v < 10) return '0' + v;
682 else return 'A' + v - 10;
683 }
684
685 static char *quote_ref_url(const char *base, const char *ref)
686 {
687 const char *cp;
688 char *dp, *qref;
689 int len, baselen, ch;
690
691 baselen = strlen(base);
692 len = baselen + 1;
693 for (cp = ref; (ch = *cp) != 0; cp++, len++)
694 if (needs_quote(ch))
695 len += 2; /* extra two hex plus replacement % */
696 qref = xmalloc(len);
697 memcpy(qref, base, baselen);
698 for (cp = ref, dp = qref + baselen; (ch = *cp) != 0; cp++) {
699 if (needs_quote(ch)) {
700 *dp++ = '%';
701 *dp++ = hex((ch >> 4) & 0xF);
702 *dp++ = hex(ch & 0xF);
703 }
704 else
705 *dp++ = ch;
706 }
707 *dp = 0;
708
709 return qref;
710 }
711
712 int fetch_ref(char *ref, unsigned char *sha1)
713 {
714 char *url;
715 char hex[42];
716 struct buffer buffer;
717 char *base = remote->url;
718 struct active_request_slot *slot;
719 buffer.size = 41;
720 buffer.posn = 0;
721 buffer.buffer = hex;
722 hex[41] = '\0';
723
724 url = quote_ref_url(base, ref);
725 slot = get_active_slot();
726 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
727 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
728 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
729 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
730 if (start_active_slot(slot)) {
731 run_active_slot(slot);
732 if (slot->curl_result != CURLE_OK)
733 return error("Couldn't get %s for %s\n%s",
734 url, ref, curl_errorstr);
735 } else {
736 return error("Unable to start request");
737 }
738
739 hex[40] = '\0';
740 get_sha1_hex(hex, sha1);
741 return 0;
742 }
743
744 static void one_remote_object(const char *hex)
745 {
746 unsigned char sha1[20];
747 struct object *obj;
748
749 if (get_sha1_hex(hex, sha1) != 0)
750 return;
751
752 obj = lookup_object(sha1);
753 if (!obj)
754 obj = parse_object(sha1);
755
756 /* Ignore remote objects that don't exist locally */
757 if (!obj)
758 return;
759
760 obj->flags |= REMOTE;
761 if (!object_list_contains(objects, obj))
762 add_object(obj, &objects, NULL, "");
763 }
764
765 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
766 {
767 int *lock_flags = (int *)ctx->userData;
768
769 if (tag_closed) {
770 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
771 if ((*lock_flags & DAV_PROP_LOCKEX) &&
772 (*lock_flags & DAV_PROP_LOCKWR)) {
773 *lock_flags |= DAV_LOCK_OK;
774 }
775 *lock_flags &= DAV_LOCK_OK;
776 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
777 *lock_flags |= DAV_PROP_LOCKWR;
778 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
779 *lock_flags |= DAV_PROP_LOCKEX;
780 }
781 }
782 }
783
784 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
785 {
786 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
787
788 if (tag_closed && ctx->cdata) {
789 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
790 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
791 strcpy(lock->owner, ctx->cdata);
792 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
793 if (!strncmp(ctx->cdata, "Second-", 7))
794 lock->timeout =
795 strtol(ctx->cdata + 7, NULL, 10);
796 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
797 if (!strncmp(ctx->cdata, "opaquelocktoken:", 16)) {
798 lock->token = xmalloc(strlen(ctx->cdata) - 15);
799 strcpy(lock->token, ctx->cdata + 16);
800 }
801 }
802 }
803 }
804
805 static void one_remote_ref(char *refname);
806 static void crawl_remote_refs(char *path);
807
808 static void handle_crawl_ref_ctx(struct xml_ctx *ctx, int tag_closed)
809 {
810 struct remote_dentry *dentry = (struct remote_dentry *)ctx->userData;
811
812
813 if (tag_closed) {
814 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && dentry->name) {
815 if (dentry->is_dir) {
816 if (strcmp(dentry->name, dentry->base)) {
817 crawl_remote_refs(dentry->name);
818 }
819 } else {
820 one_remote_ref(dentry->name);
821 }
822 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
823 dentry->name = xmalloc(strlen(ctx->cdata) -
824 remote->path_len + 1);
825 strcpy(dentry->name,
826 ctx->cdata + remote->path_len);
827 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
828 dentry->is_dir = 1;
829 }
830 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
831 dentry->name = NULL;
832 dentry->is_dir = 0;
833 }
834 }
835
836 static void handle_remote_object_list_ctx(struct xml_ctx *ctx, int tag_closed)
837 {
838 char *path;
839 char *obj_hex;
840
841 if (tag_closed) {
842 if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
843 path = ctx->cdata + remote->path_len;
844 if (strlen(path) != 50)
845 return;
846 path += 9;
847 obj_hex = xmalloc(strlen(path));
848 strncpy(obj_hex, path, 2);
849 strcpy(obj_hex + 2, path + 3);
850 one_remote_object(obj_hex);
851 free(obj_hex);
852 }
853 }
854 }
855
856 static void
857 xml_start_tag(void *userData, const char *name, const char **atts)
858 {
859 struct xml_ctx *ctx = (struct xml_ctx *)userData;
860 const char *c = index(name, ':');
861 int new_len;
862
863 if (c == NULL)
864 c = name;
865 else
866 c++;
867
868 new_len = strlen(ctx->name) + strlen(c) + 2;
869
870 if (new_len > ctx->len) {
871 ctx->name = xrealloc(ctx->name, new_len);
872 ctx->len = new_len;
873 }
874 strcat(ctx->name, ".");
875 strcat(ctx->name, c);
876
877 if (ctx->cdata) {
878 free(ctx->cdata);
879 ctx->cdata = NULL;
880 }
881
882 ctx->userFunc(ctx, 0);
883 }
884
885 static void
886 xml_end_tag(void *userData, const char *name)
887 {
888 struct xml_ctx *ctx = (struct xml_ctx *)userData;
889 const char *c = index(name, ':');
890 char *ep;
891
892 ctx->userFunc(ctx, 1);
893
894 if (c == NULL)
895 c = name;
896 else
897 c++;
898
899 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
900 *ep = 0;
901 }
902
903 static void
904 xml_cdata(void *userData, const XML_Char *s, int len)
905 {
906 struct xml_ctx *ctx = (struct xml_ctx *)userData;
907 if (ctx->cdata)
908 free(ctx->cdata);
909 ctx->cdata = xcalloc(len+1, 1);
910 strncpy(ctx->cdata, s, len);
911 }
912
913 static struct remote_lock *lock_remote(char *path, long timeout)
914 {
915 struct active_request_slot *slot;
916 struct buffer out_buffer;
917 struct buffer in_buffer;
918 char *out_data;
919 char *in_data;
920 char *url;
921 char *ep;
922 char timeout_header[25];
923 struct remote_lock *lock = remote_locks;
924 XML_Parser parser = XML_ParserCreate(NULL);
925 enum XML_Status result;
926 struct curl_slist *dav_headers = NULL;
927 struct xml_ctx ctx;
928
929 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
930 sprintf(url, "%s%s", remote->url, path);
931
932 /* Make sure the url is not already locked */
933 while (lock && strcmp(lock->url, url)) {
934 lock = lock->next;
935 }
936 if (lock) {
937 free(url);
938 if (refresh_lock(lock))
939 return lock;
940 else
941 return NULL;
942 }
943
944 /* Make sure leading directories exist for the remote ref */
945 ep = strchr(url + strlen(remote->url) + 11, '/');
946 while (ep) {
947 *ep = 0;
948 slot = get_active_slot();
949 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
950 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
951 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
952 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
953 if (start_active_slot(slot)) {
954 run_active_slot(slot);
955 if (slot->curl_result != CURLE_OK &&
956 slot->http_code != 405) {
957 fprintf(stderr,
958 "Unable to create branch path %s\n",
959 url);
960 free(url);
961 return NULL;
962 }
963 } else {
964 fprintf(stderr, "Unable to start request\n");
965 free(url);
966 return NULL;
967 }
968 *ep = '/';
969 ep = strchr(ep + 1, '/');
970 }
971
972 out_buffer.size = strlen(LOCK_REQUEST) + strlen(git_default_email) - 2;
973 out_data = xmalloc(out_buffer.size + 1);
974 snprintf(out_data, out_buffer.size + 1, LOCK_REQUEST, git_default_email);
975 out_buffer.posn = 0;
976 out_buffer.buffer = out_data;
977
978 in_buffer.size = 4096;
979 in_data = xmalloc(in_buffer.size);
980 in_buffer.posn = 0;
981 in_buffer.buffer = in_data;
982
983 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
984 dav_headers = curl_slist_append(dav_headers, timeout_header);
985 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
986
987 slot = get_active_slot();
988 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
989 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
990 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
991 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
992 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
993 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
994 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
995 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
996 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
997
998 lock = xcalloc(1, sizeof(*lock));
999 lock->owner = NULL;
1000 lock->token = NULL;
1001 lock->timeout = -1;
1002 lock->refreshing = 0;
1003
1004 if (start_active_slot(slot)) {
1005 run_active_slot(slot);
1006 if (slot->curl_result == CURLE_OK) {
1007 ctx.name = xcalloc(10, 1);
1008 ctx.len = 0;
1009 ctx.cdata = NULL;
1010 ctx.userFunc = handle_new_lock_ctx;
1011 ctx.userData = lock;
1012 XML_SetUserData(parser, &ctx);
1013 XML_SetElementHandler(parser, xml_start_tag,
1014 xml_end_tag);
1015 XML_SetCharacterDataHandler(parser, xml_cdata);
1016 result = XML_Parse(parser, in_buffer.buffer,
1017 in_buffer.posn, 1);
1018 free(ctx.name);
1019 if (result != XML_STATUS_OK) {
1020 fprintf(stderr, "XML error: %s\n",
1021 XML_ErrorString(
1022 XML_GetErrorCode(parser)));
1023 lock->timeout = -1;
1024 }
1025 }
1026 } else {
1027 fprintf(stderr, "Unable to start request\n");
1028 }
1029
1030 curl_slist_free_all(dav_headers);
1031 free(out_data);
1032 free(in_data);
1033
1034 if (lock->token == NULL || lock->timeout <= 0) {
1035 if (lock->token != NULL)
1036 free(lock->token);
1037 if (lock->owner != NULL)
1038 free(lock->owner);
1039 free(url);
1040 free(lock);
1041 lock = NULL;
1042 } else {
1043 lock->url = url;
1044 lock->active = 1;
1045 lock->start_time = time(NULL);
1046 lock->next = remote_locks;
1047 remote_locks = lock;
1048 }
1049
1050 return lock;
1051 }
1052
1053 static int unlock_remote(struct remote_lock *lock)
1054 {
1055 struct active_request_slot *slot;
1056 char *lock_token_header;
1057 struct curl_slist *dav_headers = NULL;
1058 int rc = 0;
1059
1060 lock_token_header = xmalloc(strlen(lock->token) + 31);
1061 sprintf(lock_token_header, "Lock-Token: <opaquelocktoken:%s>",
1062 lock->token);
1063 dav_headers = curl_slist_append(dav_headers, lock_token_header);
1064
1065 slot = get_active_slot();
1066 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1067 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1068 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1069 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1070
1071 if (start_active_slot(slot)) {
1072 run_active_slot(slot);
1073 if (slot->curl_result == CURLE_OK)
1074 rc = 1;
1075 else
1076 fprintf(stderr, "Got HTTP error %ld\n",
1077 slot->http_code);
1078 } else {
1079 fprintf(stderr, "Unable to start request\n");
1080 }
1081
1082 curl_slist_free_all(dav_headers);
1083 free(lock_token_header);
1084
1085 lock->active = 0;
1086
1087 return rc;
1088 }
1089
1090 static void crawl_remote_refs(char *path)
1091 {
1092 char *url;
1093 struct active_request_slot *slot;
1094 struct buffer in_buffer;
1095 struct buffer out_buffer;
1096 char *in_data;
1097 char *out_data;
1098 XML_Parser parser = XML_ParserCreate(NULL);
1099 enum XML_Status result;
1100 struct curl_slist *dav_headers = NULL;
1101 struct xml_ctx ctx;
1102 struct remote_dentry dentry;
1103
1104 fprintf(stderr, " %s\n", path);
1105
1106 dentry.base = path;
1107 dentry.name = NULL;
1108 dentry.is_dir = 0;
1109
1110 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1111 sprintf(url, "%s%s", remote->url, path);
1112
1113 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1114 out_data = xmalloc(out_buffer.size + 1);
1115 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1116 out_buffer.posn = 0;
1117 out_buffer.buffer = out_data;
1118
1119 in_buffer.size = 4096;
1120 in_data = xmalloc(in_buffer.size);
1121 in_buffer.posn = 0;
1122 in_buffer.buffer = in_data;
1123
1124 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1125 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1126
1127 slot = get_active_slot();
1128 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1129 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1130 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1131 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1132 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1133 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1134 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1135 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1136 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1137
1138 if (start_active_slot(slot)) {
1139 run_active_slot(slot);
1140 if (slot->curl_result == CURLE_OK) {
1141 ctx.name = xcalloc(10, 1);
1142 ctx.len = 0;
1143 ctx.cdata = NULL;
1144 ctx.userFunc = handle_crawl_ref_ctx;
1145 ctx.userData = &dentry;
1146 XML_SetUserData(parser, &ctx);
1147 XML_SetElementHandler(parser, xml_start_tag,
1148 xml_end_tag);
1149 XML_SetCharacterDataHandler(parser, xml_cdata);
1150 result = XML_Parse(parser, in_buffer.buffer,
1151 in_buffer.posn, 1);
1152 free(ctx.name);
1153
1154 if (result != XML_STATUS_OK) {
1155 fprintf(stderr, "XML error: %s\n",
1156 XML_ErrorString(
1157 XML_GetErrorCode(parser)));
1158 }
1159 }
1160 } else {
1161 fprintf(stderr, "Unable to start request\n");
1162 }
1163
1164 free(url);
1165 free(out_data);
1166 free(in_buffer.buffer);
1167 curl_slist_free_all(dav_headers);
1168 }
1169
1170 static void get_remote_object_list(unsigned char parent)
1171 {
1172 char *url;
1173 struct active_request_slot *slot;
1174 struct buffer in_buffer;
1175 struct buffer out_buffer;
1176 char *in_data;
1177 char *out_data;
1178 XML_Parser parser = XML_ParserCreate(NULL);
1179 enum XML_Status result;
1180 struct curl_slist *dav_headers = NULL;
1181 struct xml_ctx ctx;
1182 char path[] = "/objects/XX/";
1183 static const char hex[] = "0123456789abcdef";
1184 unsigned int val = parent;
1185
1186 path[9] = hex[val >> 4];
1187 path[10] = hex[val & 0xf];
1188 url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1189 sprintf(url, "%s%s", remote->url, path);
1190
1191 out_buffer.size = strlen(PROPFIND_ALL_REQUEST);
1192 out_data = xmalloc(out_buffer.size + 1);
1193 snprintf(out_data, out_buffer.size + 1, PROPFIND_ALL_REQUEST);
1194 out_buffer.posn = 0;
1195 out_buffer.buffer = out_data;
1196
1197 in_buffer.size = 4096;
1198 in_data = xmalloc(in_buffer.size);
1199 in_buffer.posn = 0;
1200 in_buffer.buffer = in_data;
1201
1202 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1203 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1204
1205 slot = get_active_slot();
1206 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1207 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1208 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1209 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1210 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1211 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1212 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1213 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1214 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1215
1216 if (start_active_slot(slot)) {
1217 run_active_slot(slot);
1218 if (slot->curl_result == CURLE_OK) {
1219 remote_dir_exists[parent] = 1;
1220 ctx.name = xcalloc(10, 1);
1221 ctx.len = 0;
1222 ctx.cdata = NULL;
1223 ctx.userFunc = handle_remote_object_list_ctx;
1224 XML_SetUserData(parser, &ctx);
1225 XML_SetElementHandler(parser, xml_start_tag,
1226 xml_end_tag);
1227 XML_SetCharacterDataHandler(parser, xml_cdata);
1228 result = XML_Parse(parser, in_buffer.buffer,
1229 in_buffer.posn, 1);
1230 free(ctx.name);
1231
1232 if (result != XML_STATUS_OK) {
1233 fprintf(stderr, "XML error: %s\n",
1234 XML_ErrorString(
1235 XML_GetErrorCode(parser)));
1236 }
1237 } else {
1238 remote_dir_exists[parent] = 0;
1239 }
1240 } else {
1241 fprintf(stderr, "Unable to start request\n");
1242 }
1243
1244 free(url);
1245 free(out_data);
1246 free(in_buffer.buffer);
1247 curl_slist_free_all(dav_headers);
1248 }
1249
1250 static int locking_available(void)
1251 {
1252 struct active_request_slot *slot;
1253 struct buffer in_buffer;
1254 struct buffer out_buffer;
1255 char *in_data;
1256 char *out_data;
1257 XML_Parser parser = XML_ParserCreate(NULL);
1258 enum XML_Status result;
1259 struct curl_slist *dav_headers = NULL;
1260 struct xml_ctx ctx;
1261 int lock_flags = 0;
1262
1263 out_buffer.size =
1264 strlen(PROPFIND_SUPPORTEDLOCK_REQUEST) +
1265 strlen(remote->url) - 2;
1266 out_data = xmalloc(out_buffer.size + 1);
1267 snprintf(out_data, out_buffer.size + 1,
1268 PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1269 out_buffer.posn = 0;
1270 out_buffer.buffer = out_data;
1271
1272 in_buffer.size = 4096;
1273 in_data = xmalloc(in_buffer.size);
1274 in_buffer.posn = 0;
1275 in_buffer.buffer = in_data;
1276
1277 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1278 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1279
1280 slot = get_active_slot();
1281 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1282 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1283 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1284 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1285 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1286 curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1287 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1288 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1289 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1290
1291 if (start_active_slot(slot)) {
1292 run_active_slot(slot);
1293 if (slot->curl_result == CURLE_OK) {
1294 ctx.name = xcalloc(10, 1);
1295 ctx.len = 0;
1296 ctx.cdata = NULL;
1297 ctx.userFunc = handle_lockprop_ctx;
1298 ctx.userData = &lock_flags;
1299 XML_SetUserData(parser, &ctx);
1300 XML_SetElementHandler(parser, xml_start_tag,
1301 xml_end_tag);
1302 result = XML_Parse(parser, in_buffer.buffer,
1303 in_buffer.posn, 1);
1304 free(ctx.name);
1305
1306 if (result != XML_STATUS_OK) {
1307 fprintf(stderr, "XML error: %s\n",
1308 XML_ErrorString(
1309 XML_GetErrorCode(parser)));
1310 lock_flags = 0;
1311 }
1312 }
1313 } else {
1314 fprintf(stderr, "Unable to start request\n");
1315 }
1316
1317 free(out_data);
1318 free(in_buffer.buffer);
1319 curl_slist_free_all(dav_headers);
1320
1321 return lock_flags;
1322 }
1323
1324 static struct object_list **process_blob(struct blob *blob,
1325 struct object_list **p,
1326 struct name_path *path,
1327 const char *name)
1328 {
1329 struct object *obj = &blob->object;
1330
1331 obj->flags |= LOCAL;
1332
1333 if (obj->flags & (UNINTERESTING | SEEN))
1334 return p;
1335
1336 obj->flags |= SEEN;
1337 return add_object(obj, p, path, name);
1338 }
1339
1340 static struct object_list **process_tree(struct tree *tree,
1341 struct object_list **p,
1342 struct name_path *path,
1343 const char *name)
1344 {
1345 struct object *obj = &tree->object;
1346 struct tree_entry_list *entry;
1347 struct name_path me;
1348
1349 obj->flags |= LOCAL;
1350
1351 if (obj->flags & (UNINTERESTING | SEEN))
1352 return p;
1353 if (parse_tree(tree) < 0)
1354 die("bad tree object %s", sha1_to_hex(obj->sha1));
1355
1356 obj->flags |= SEEN;
1357 p = add_object(obj, p, NULL, name);
1358 me.up = path;
1359 me.elem = name;
1360 me.elem_len = strlen(name);
1361 entry = tree->entries;
1362 tree->entries = NULL;
1363 while (entry) {
1364 struct tree_entry_list *next = entry->next;
1365 if (entry->directory)
1366 p = process_tree(entry->item.tree, p, &me, entry->name);
1367 else
1368 p = process_blob(entry->item.blob, p, &me, entry->name);
1369 free(entry);
1370 entry = next;
1371 }
1372 return p;
1373 }
1374
1375 static void get_delta(struct rev_info *revs, struct remote_lock *lock)
1376 {
1377 struct commit *commit;
1378 struct object_list **p = &objects, *pending;
1379
1380 while ((commit = get_revision(revs)) != NULL) {
1381 p = process_tree(commit->tree, p, NULL, "");
1382 commit->object.flags |= LOCAL;
1383 if (!(commit->object.flags & UNINTERESTING))
1384 add_request(&commit->object, lock);
1385 }
1386
1387 for (pending = revs->pending_objects; pending; pending = pending->next) {
1388 struct object *obj = pending->item;
1389 const char *name = pending->name;
1390
1391 if (obj->flags & (UNINTERESTING | SEEN))
1392 continue;
1393 if (obj->type == tag_type) {
1394 obj->flags |= SEEN;
1395 p = add_object(obj, p, NULL, name);
1396 continue;
1397 }
1398 if (obj->type == tree_type) {
1399 p = process_tree((struct tree *)obj, p, NULL, name);
1400 continue;
1401 }
1402 if (obj->type == blob_type) {
1403 p = process_blob((struct blob *)obj, p, NULL, name);
1404 continue;
1405 }
1406 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1407 }
1408
1409 while (objects) {
1410 if (!(objects->item->flags & UNINTERESTING))
1411 add_request(objects->item, lock);
1412 objects = objects->next;
1413 }
1414 }
1415
1416 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1417 {
1418 struct active_request_slot *slot;
1419 char *out_data;
1420 char *if_header;
1421 struct buffer out_buffer;
1422 struct curl_slist *dav_headers = NULL;
1423 int i;
1424
1425 if_header = xmalloc(strlen(lock->token) + 25);
1426 sprintf(if_header, "If: (<opaquelocktoken:%s>)", lock->token);
1427 dav_headers = curl_slist_append(dav_headers, if_header);
1428
1429 out_buffer.size = 41;
1430 out_data = xmalloc(out_buffer.size + 1);
1431 i = snprintf(out_data, out_buffer.size + 1, "%s\n", sha1_to_hex(sha1));
1432 if (i != out_buffer.size) {
1433 fprintf(stderr, "Unable to initialize PUT request body\n");
1434 return 0;
1435 }
1436 out_buffer.posn = 0;
1437 out_buffer.buffer = out_data;
1438
1439 slot = get_active_slot();
1440 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1441 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.size);
1442 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1443 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1444 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1445 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1446 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1447 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1448 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1449
1450 if (start_active_slot(slot)) {
1451 run_active_slot(slot);
1452 free(out_data);
1453 free(if_header);
1454 if (slot->curl_result != CURLE_OK) {
1455 fprintf(stderr,
1456 "PUT error: curl result=%d, HTTP code=%ld\n",
1457 slot->curl_result, slot->http_code);
1458 /* We should attempt recovery? */
1459 return 0;
1460 }
1461 } else {
1462 free(out_data);
1463 free(if_header);
1464 fprintf(stderr, "Unable to start PUT request\n");
1465 return 0;
1466 }
1467
1468 return 1;
1469 }
1470
1471 static struct ref *local_refs, **local_tail;
1472 static struct ref *remote_refs, **remote_tail;
1473
1474 static int one_local_ref(const char *refname, const unsigned char *sha1)
1475 {
1476 struct ref *ref;
1477 int len = strlen(refname) + 1;
1478 ref = xcalloc(1, sizeof(*ref) + len);
1479 memcpy(ref->new_sha1, sha1, 20);
1480 memcpy(ref->name, refname, len);
1481 *local_tail = ref;
1482 local_tail = &ref->next;
1483 return 0;
1484 }
1485
1486 static void one_remote_ref(char *refname)
1487 {
1488 struct ref *ref;
1489 unsigned char remote_sha1[20];
1490
1491 if (fetch_ref(refname, remote_sha1) != 0) {
1492 fprintf(stderr,
1493 "Unable to fetch ref %s from %s\n",
1494 refname, remote->url);
1495 return;
1496 }
1497
1498 int len = strlen(refname) + 1;
1499 ref = xcalloc(1, sizeof(*ref) + len);
1500 memcpy(ref->old_sha1, remote_sha1, 20);
1501 memcpy(ref->name, refname, len);
1502 *remote_tail = ref;
1503 remote_tail = &ref->next;
1504 }
1505
1506 static void get_local_heads(void)
1507 {
1508 local_tail = &local_refs;
1509 for_each_ref(one_local_ref);
1510 }
1511
1512 static void get_dav_remote_heads(void)
1513 {
1514 remote_tail = &remote_refs;
1515 crawl_remote_refs("refs/");
1516 }
1517
1518 static int is_zero_sha1(const unsigned char *sha1)
1519 {
1520 int i;
1521
1522 for (i = 0; i < 20; i++) {
1523 if (*sha1++)
1524 return 0;
1525 }
1526 return 1;
1527 }
1528
1529 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1530 {
1531 while (list) {
1532 struct commit_list *temp = list;
1533 temp->item->object.flags &= ~mark;
1534 list = temp->next;
1535 free(temp);
1536 }
1537 }
1538
1539 static int ref_newer(const unsigned char *new_sha1,
1540 const unsigned char *old_sha1)
1541 {
1542 struct object *o;
1543 struct commit *old, *new;
1544 struct commit_list *list, *used;
1545 int found = 0;
1546
1547 /* Both new and old must be commit-ish and new is descendant of
1548 * old. Otherwise we require --force.
1549 */
1550 o = deref_tag(parse_object(old_sha1), NULL, 0);
1551 if (!o || o->type != commit_type)
1552 return 0;
1553 old = (struct commit *) o;
1554
1555 o = deref_tag(parse_object(new_sha1), NULL, 0);
1556 if (!o || o->type != commit_type)
1557 return 0;
1558 new = (struct commit *) o;
1559
1560 if (parse_commit(new) < 0)
1561 return 0;
1562
1563 used = list = NULL;
1564 commit_list_insert(new, &list);
1565 while (list) {
1566 new = pop_most_recent_commit(&list, TMP_MARK);
1567 commit_list_insert(new, &used);
1568 if (new == old) {
1569 found = 1;
1570 break;
1571 }
1572 }
1573 unmark_and_free(list, TMP_MARK);
1574 unmark_and_free(used, TMP_MARK);
1575 return found;
1576 }
1577
1578 static void mark_edge_parents_uninteresting(struct commit *commit)
1579 {
1580 struct commit_list *parents;
1581
1582 for (parents = commit->parents; parents; parents = parents->next) {
1583 struct commit *parent = parents->item;
1584 if (!(parent->object.flags & UNINTERESTING))
1585 continue;
1586 mark_tree_uninteresting(parent->tree);
1587 }
1588 }
1589
1590 static void mark_edges_uninteresting(struct commit_list *list)
1591 {
1592 for ( ; list; list = list->next) {
1593 struct commit *commit = list->item;
1594
1595 if (commit->object.flags & UNINTERESTING) {
1596 mark_tree_uninteresting(commit->tree);
1597 continue;
1598 }
1599 mark_edge_parents_uninteresting(commit);
1600 }
1601 }
1602
1603 int main(int argc, char **argv)
1604 {
1605 struct transfer_request *request;
1606 struct transfer_request *next_request;
1607 int nr_refspec = 0;
1608 char **refspec = NULL;
1609 struct remote_lock *ref_lock;
1610 struct rev_info revs;
1611 int rc = 0;
1612 int i;
1613
1614 setup_git_directory();
1615 setup_ident();
1616
1617 remote = xmalloc(sizeof(*remote));
1618 remote->url = NULL;
1619 remote->path_len = 0;
1620 remote->packs = NULL;
1621
1622 argv++;
1623 for (i = 1; i < argc; i++, argv++) {
1624 char *arg = *argv;
1625
1626 if (*arg == '-') {
1627 if (!strcmp(arg, "--all")) {
1628 push_all = 1;
1629 continue;
1630 }
1631 if (!strcmp(arg, "--force")) {
1632 force_all = 1;
1633 continue;
1634 }
1635 if (!strcmp(arg, "--verbose")) {
1636 push_verbosely = 1;
1637 continue;
1638 }
1639 usage(http_push_usage);
1640 }
1641 if (!remote->url) {
1642 remote->url = arg;
1643 char *path = strstr(arg, "//");
1644 if (path) {
1645 path = index(path+2, '/');
1646 if (path)
1647 remote->path_len = strlen(path);
1648 }
1649 continue;
1650 }
1651 refspec = argv;
1652 nr_refspec = argc - i;
1653 break;
1654 }
1655
1656 if (!remote->url)
1657 usage(http_push_usage);
1658
1659 memset(remote_dir_exists, -1, 256);
1660
1661 http_init();
1662
1663 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
1664 default_headers = curl_slist_append(default_headers, "Range:");
1665 default_headers = curl_slist_append(default_headers, "Destination:");
1666 default_headers = curl_slist_append(default_headers, "If:");
1667 default_headers = curl_slist_append(default_headers,
1668 "Pragma: no-cache");
1669
1670 /* Verify DAV compliance/lock support */
1671 if (!locking_available()) {
1672 fprintf(stderr, "Error: no DAV locking support on remote repo %s\n", remote->url);
1673 rc = 1;
1674 goto cleanup;
1675 }
1676
1677 /* Get a list of all local and remote heads to validate refspecs */
1678 get_local_heads();
1679 fprintf(stderr, "Fetching remote heads...\n");
1680 get_dav_remote_heads();
1681
1682 /* match them up */
1683 if (!remote_tail)
1684 remote_tail = &remote_refs;
1685 if (match_refs(local_refs, remote_refs, &remote_tail,
1686 nr_refspec, refspec, push_all))
1687 return -1;
1688 if (!remote_refs) {
1689 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1690 return 0;
1691 }
1692
1693 int ret = 0;
1694 int new_refs = 0;
1695 struct ref *ref;
1696 for (ref = remote_refs; ref; ref = ref->next) {
1697 char old_hex[60], *new_hex;
1698 if (!ref->peer_ref)
1699 continue;
1700 if (!memcmp(ref->old_sha1, ref->peer_ref->new_sha1, 20)) {
1701 if (push_verbosely || 1)
1702 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1703 continue;
1704 }
1705
1706 if (!force_all &&
1707 !is_zero_sha1(ref->old_sha1) &&
1708 !ref->force) {
1709 if (!has_sha1_file(ref->old_sha1) ||
1710 !ref_newer(ref->peer_ref->new_sha1,
1711 ref->old_sha1)) {
1712 /* We do not have the remote ref, or
1713 * we know that the remote ref is not
1714 * an ancestor of what we are trying to
1715 * push. Either way this can be losing
1716 * commits at the remote end and likely
1717 * we were not up to date to begin with.
1718 */
1719 error("remote '%s' is not a strict "
1720 "subset of local ref '%s'. "
1721 "maybe you are not up-to-date and "
1722 "need to pull first?",
1723 ref->name,
1724 ref->peer_ref->name);
1725 ret = -2;
1726 continue;
1727 }
1728 }
1729 memcpy(ref->new_sha1, ref->peer_ref->new_sha1, 20);
1730 if (is_zero_sha1(ref->new_sha1)) {
1731 error("cannot happen anymore");
1732 ret = -3;
1733 continue;
1734 }
1735 new_refs++;
1736 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
1737 new_hex = sha1_to_hex(ref->new_sha1);
1738
1739 fprintf(stderr, "updating '%s'", ref->name);
1740 if (strcmp(ref->name, ref->peer_ref->name))
1741 fprintf(stderr, " using '%s'", ref->peer_ref->name);
1742 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
1743
1744
1745 /* Lock remote branch ref */
1746 ref_lock = lock_remote(ref->name, LOCK_TIME);
1747 if (ref_lock == NULL) {
1748 fprintf(stderr, "Unable to lock remote branch %s\n",
1749 ref->name);
1750 rc = 1;
1751 continue;
1752 }
1753
1754 /* Set up revision info for this refspec */
1755 const char *commit_argv[4];
1756 int commit_argc = 3;
1757 char *new_sha1_hex = strdup(sha1_to_hex(ref->new_sha1));
1758 char *old_sha1_hex = NULL;
1759 commit_argv[1] = "--objects";
1760 commit_argv[2] = new_sha1_hex;
1761 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
1762 old_sha1_hex = xmalloc(42);
1763 sprintf(old_sha1_hex, "^%s",
1764 sha1_to_hex(ref->old_sha1));
1765 commit_argv[3] = old_sha1_hex;
1766 commit_argc++;
1767 }
1768 setup_revisions(commit_argc, commit_argv, &revs, NULL);
1769 free(new_sha1_hex);
1770 if (old_sha1_hex) {
1771 free(old_sha1_hex);
1772 commit_argv[1] = NULL;
1773 }
1774
1775 /* Generate a list of objects that need to be pushed */
1776 pushing = 0;
1777 prepare_revision_walk(&revs);
1778 mark_edges_uninteresting(revs.commits);
1779 fetch_indices();
1780 get_delta(&revs, ref_lock);
1781 finish_all_active_slots();
1782
1783 /* Push missing objects to remote, this would be a
1784 convenient time to pack them first if appropriate. */
1785 pushing = 1;
1786 fill_active_slots();
1787 finish_all_active_slots();
1788
1789 /* Update the remote branch if all went well */
1790 if (aborted || !update_remote(ref->new_sha1, ref_lock)) {
1791 rc = 1;
1792 goto unlock;
1793 }
1794
1795 unlock:
1796 if (!rc)
1797 fprintf(stderr, " done\n");
1798 unlock_remote(ref_lock);
1799 }
1800
1801 cleanup:
1802 free(remote);
1803
1804 curl_slist_free_all(no_pragma_header);
1805 curl_slist_free_all(default_headers);
1806
1807 http_cleanup();
1808
1809 request = request_queue_head;
1810 while (request != NULL) {
1811 next_request = request->next;
1812 release_request(request);
1813 request = next_request;
1814 }
1815
1816 return rc;
1817 }
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