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Allow users to un-configure rename detection
[git/dscho.git] / http-push.c
blobfeeb340daf4a2711050cbc035e5609e0b66fa648
1 #include "cache.h"
2 #include "commit.h"
3 #include "pack.h"
4 #include "tag.h"
5 #include "blob.h"
6 #include "http.h"
7 #include "refs.h"
8 #include "diff.h"
9 #include "revision.h"
10 #include "exec_cmd.h"
11 #include "remote.h"
12 #include "list-objects.h"
13 #include "sigchain.h"
14
15 #include <expat.h>
16
17 static const char http_push_usage[] =
18 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
19
20 #ifndef XML_STATUS_OK
21 enum XML_Status {
22 XML_STATUS_OK = 1,
23 XML_STATUS_ERROR = 0
24 };
25 #define XML_STATUS_OK 1
26 #define XML_STATUS_ERROR 0
27 #endif
28
29 #define PREV_BUF_SIZE 4096
30 #define RANGE_HEADER_SIZE 30
31
32 /* DAV methods */
33 #define DAV_LOCK "LOCK"
34 #define DAV_MKCOL "MKCOL"
35 #define DAV_MOVE "MOVE"
36 #define DAV_PROPFIND "PROPFIND"
37 #define DAV_PUT "PUT"
38 #define DAV_UNLOCK "UNLOCK"
39 #define DAV_DELETE "DELETE"
40
41 /* DAV lock flags */
42 #define DAV_PROP_LOCKWR (1u << 0)
43 #define DAV_PROP_LOCKEX (1u << 1)
44 #define DAV_LOCK_OK (1u << 2)
45
46 /* DAV XML properties */
47 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
48 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
49 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
50 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
51 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
52 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
53 #define DAV_PROPFIND_RESP ".multistatus.response"
54 #define DAV_PROPFIND_NAME ".multistatus.response.href"
55 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
56
57 /* DAV request body templates */
58 #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>"
59 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
60 #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>"
61
62 #define LOCK_TIME 600
63 #define LOCK_REFRESH 30
64
65 /* bits #0-15 in revision.h */
66
67 #define LOCAL (1u<<16)
68 #define REMOTE (1u<<17)
69 #define FETCHING (1u<<18)
70 #define PUSHING (1u<<19)
71
72 /* We allow "recursive" symbolic refs. Only within reason, though */
73 #define MAXDEPTH 5
74
75 static int pushing;
76 static int aborted;
77 static signed char remote_dir_exists[256];
78
79 static struct curl_slist *no_pragma_header;
80
81 static int push_verbosely;
82 static int push_all = MATCH_REFS_NONE;
83 static int force_all;
84 static int dry_run;
85
86 static struct object_list *objects;
87
88 struct repo
89 {
90 char *url;
91 char *path;
92 int path_len;
93 int has_info_refs;
94 int can_update_info_refs;
95 int has_info_packs;
96 struct packed_git *packs;
97 struct remote_lock *locks;
98 };
99
100 static struct repo *repo;
101
102 enum transfer_state {
103 NEED_FETCH,
104 RUN_FETCH_LOOSE,
105 RUN_FETCH_PACKED,
106 NEED_PUSH,
107 RUN_MKCOL,
108 RUN_PUT,
109 RUN_MOVE,
110 ABORTED,
111 COMPLETE,
112 };
113
114 struct transfer_request
115 {
116 struct object *obj;
117 char *url;
118 char *dest;
119 struct remote_lock *lock;
120 struct curl_slist *headers;
121 struct buffer buffer;
122 char filename[PATH_MAX];
123 char tmpfile[PATH_MAX];
124 int local_fileno;
125 FILE *local_stream;
126 enum transfer_state state;
127 CURLcode curl_result;
128 char errorstr[CURL_ERROR_SIZE];
129 long http_code;
130 unsigned char real_sha1[20];
131 git_SHA_CTX c;
132 z_stream stream;
133 int zret;
134 int rename;
135 void *userData;
136 struct active_request_slot *slot;
137 struct transfer_request *next;
138 };
139
140 static struct transfer_request *request_queue_head;
141
142 struct xml_ctx
143 {
144 char *name;
145 int len;
146 char *cdata;
147 void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
148 void *userData;
149 };
150
151 struct remote_lock
152 {
153 char *url;
154 char *owner;
155 char *token;
156 char tmpfile_suffix[41];
157 time_t start_time;
158 long timeout;
159 int refreshing;
160 struct remote_lock *next;
161 };
162
163 /* Flags that control remote_ls processing */
164 #define PROCESS_FILES (1u << 0)
165 #define PROCESS_DIRS (1u << 1)
166 #define RECURSIVE (1u << 2)
167
168 /* Flags that remote_ls passes to callback functions */
169 #define IS_DIR (1u << 0)
170
171 struct remote_ls_ctx
172 {
173 char *path;
174 void (*userFunc)(struct remote_ls_ctx *ls);
175 void *userData;
176 int flags;
177 char *dentry_name;
178 int dentry_flags;
179 struct remote_ls_ctx *parent;
180 };
181
182 /* get_dav_token_headers options */
183 enum dav_header_flag {
184 DAV_HEADER_IF = (1u << 0),
185 DAV_HEADER_LOCK = (1u << 1),
186 DAV_HEADER_TIMEOUT = (1u << 2)
187 };
188
189 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
190 {
191 struct strbuf buf = STRBUF_INIT;
192 struct curl_slist *dav_headers = NULL;
193
194 if (options & DAV_HEADER_IF) {
195 strbuf_addf(&buf, "If: (<%s>)", lock->token);
196 dav_headers = curl_slist_append(dav_headers, buf.buf);
197 strbuf_reset(&buf);
198 }
199 if (options & DAV_HEADER_LOCK) {
200 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
201 dav_headers = curl_slist_append(dav_headers, buf.buf);
202 strbuf_reset(&buf);
203 }
204 if (options & DAV_HEADER_TIMEOUT) {
205 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
206 dav_headers = curl_slist_append(dav_headers, buf.buf);
207 strbuf_reset(&buf);
208 }
209 strbuf_release(&buf);
210
211 return dav_headers;
212 }
213
214 static void append_remote_object_url(struct strbuf *buf, const char *url,
215 const char *hex,
216 int only_two_digit_prefix)
217 {
218 strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex);
219 if (!only_two_digit_prefix)
220 strbuf_addf(buf, "%s", hex+2);
221 }
222
223 static void finish_request(struct transfer_request *request);
224 static void release_request(struct transfer_request *request);
225
226 static void process_response(void *callback_data)
227 {
228 struct transfer_request *request =
229 (struct transfer_request *)callback_data;
230
231 finish_request(request);
232 }
233
234 #ifdef USE_CURL_MULTI
235
236 static char *get_remote_object_url(const char *url, const char *hex,
237 int only_two_digit_prefix)
238 {
239 struct strbuf buf = STRBUF_INIT;
240 append_remote_object_url(&buf, url, hex, only_two_digit_prefix);
241 return strbuf_detach(&buf, NULL);
242 }
243
244 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
245 void *data)
246 {
247 unsigned char expn[4096];
248 size_t size = eltsize * nmemb;
249 int posn = 0;
250 struct transfer_request *request = (struct transfer_request *)data;
251 do {
252 ssize_t retval = xwrite(request->local_fileno,
253 (char *) ptr + posn, size - posn);
254 if (retval < 0)
255 return posn;
256 posn += retval;
257 } while (posn < size);
258
259 request->stream.avail_in = size;
260 request->stream.next_in = ptr;
261 do {
262 request->stream.next_out = expn;
263 request->stream.avail_out = sizeof(expn);
264 request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH);
265 git_SHA1_Update(&request->c, expn,
266 sizeof(expn) - request->stream.avail_out);
267 } while (request->stream.avail_in && request->zret == Z_OK);
268 data_received++;
269 return size;
270 }
271
272 static void start_fetch_loose(struct transfer_request *request)
273 {
274 char *hex = sha1_to_hex(request->obj->sha1);
275 char *filename;
276 char prevfile[PATH_MAX];
277 char *url;
278 int prevlocal;
279 unsigned char prev_buf[PREV_BUF_SIZE];
280 ssize_t prev_read = 0;
281 long prev_posn = 0;
282 char range[RANGE_HEADER_SIZE];
283 struct curl_slist *range_header = NULL;
284 struct active_request_slot *slot;
285
286 filename = sha1_file_name(request->obj->sha1);
287 snprintf(request->filename, sizeof(request->filename), "%s", filename);
288 snprintf(request->tmpfile, sizeof(request->tmpfile),
289 "%s.temp", filename);
290
291 snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
292 unlink(prevfile);
293 rename(request->tmpfile, prevfile);
294 unlink(request->tmpfile);
295
296 if (request->local_fileno != -1)
297 error("fd leakage in start: %d", request->local_fileno);
298 request->local_fileno = open(request->tmpfile,
299 O_WRONLY | O_CREAT | O_EXCL, 0666);
300 /* This could have failed due to the "lazy directory creation";
301 * try to mkdir the last path component.
302 */
303 if (request->local_fileno < 0 && errno == ENOENT) {
304 char *dir = strrchr(request->tmpfile, '/');
305 if (dir) {
306 *dir = 0;
307 mkdir(request->tmpfile, 0777);
308 *dir = '/';
309 }
310 request->local_fileno = open(request->tmpfile,
311 O_WRONLY | O_CREAT | O_EXCL, 0666);
312 }
313
314 if (request->local_fileno < 0) {
315 request->state = ABORTED;
316 error("Couldn't create temporary file %s for %s: %s",
317 request->tmpfile, request->filename, strerror(errno));
318 return;
319 }
320
321 memset(&request->stream, 0, sizeof(request->stream));
322
323 git_inflate_init(&request->stream);
324
325 git_SHA1_Init(&request->c);
326
327 url = get_remote_object_url(repo->url, hex, 0);
328 request->url = xstrdup(url);
329
330 /* If a previous temp file is present, process what was already
331 fetched. */
332 prevlocal = open(prevfile, O_RDONLY);
333 if (prevlocal != -1) {
334 do {
335 prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
336 if (prev_read>0) {
337 if (fwrite_sha1_file(prev_buf,
338 1,
339 prev_read,
340 request) == prev_read) {
341 prev_posn += prev_read;
342 } else {
343 prev_read = -1;
344 }
345 }
346 } while (prev_read > 0);
347 close(prevlocal);
348 }
349 unlink(prevfile);
350
351 /* Reset inflate/SHA1 if there was an error reading the previous temp
352 file; also rewind to the beginning of the local file. */
353 if (prev_read == -1) {
354 memset(&request->stream, 0, sizeof(request->stream));
355 git_inflate_init(&request->stream);
356 git_SHA1_Init(&request->c);
357 if (prev_posn>0) {
358 prev_posn = 0;
359 lseek(request->local_fileno, 0, SEEK_SET);
360 ftruncate(request->local_fileno, 0);
361 }
362 }
363
364 slot = get_active_slot();
365 slot->callback_func = process_response;
366 slot->callback_data = request;
367 request->slot = slot;
368
369 curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
370 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
371 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
372 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
373 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
374
375 /* If we have successfully processed data from a previous fetch
376 attempt, only fetch the data we don't already have. */
377 if (prev_posn>0) {
378 if (push_verbosely)
379 fprintf(stderr,
380 "Resuming fetch of object %s at byte %ld\n",
381 hex, prev_posn);
382 sprintf(range, "Range: bytes=%ld-", prev_posn);
383 range_header = curl_slist_append(range_header, range);
384 curl_easy_setopt(slot->curl,
385 CURLOPT_HTTPHEADER, range_header);
386 }
387
388 /* Try to get the request started, abort the request on error */
389 request->state = RUN_FETCH_LOOSE;
390 if (!start_active_slot(slot)) {
391 fprintf(stderr, "Unable to start GET request\n");
392 repo->can_update_info_refs = 0;
393 release_request(request);
394 }
395 }
396
397 static void start_mkcol(struct transfer_request *request)
398 {
399 char *hex = sha1_to_hex(request->obj->sha1);
400 struct active_request_slot *slot;
401
402 request->url = get_remote_object_url(repo->url, hex, 1);
403
404 slot = get_active_slot();
405 slot->callback_func = process_response;
406 slot->callback_data = request;
407 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
408 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
409 curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
410 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
411 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
412
413 if (start_active_slot(slot)) {
414 request->slot = slot;
415 request->state = RUN_MKCOL;
416 } else {
417 request->state = ABORTED;
418 free(request->url);
419 request->url = NULL;
420 }
421 }
422 #endif
423
424 static void start_fetch_packed(struct transfer_request *request)
425 {
426 char *url;
427 struct packed_git *target;
428 FILE *packfile;
429 char *filename;
430 long prev_posn = 0;
431 char range[RANGE_HEADER_SIZE];
432 struct curl_slist *range_header = NULL;
433
434 struct transfer_request *check_request = request_queue_head;
435 struct active_request_slot *slot;
436
437 target = find_sha1_pack(request->obj->sha1, repo->packs);
438 if (!target) {
439 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
440 repo->can_update_info_refs = 0;
441 release_request(request);
442 return;
443 }
444
445 fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
446 fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
447
448 filename = sha1_pack_name(target->sha1);
449 snprintf(request->filename, sizeof(request->filename), "%s", filename);
450 snprintf(request->tmpfile, sizeof(request->tmpfile),
451 "%s.temp", filename);
452
453 url = xmalloc(strlen(repo->url) + 64);
454 sprintf(url, "%sobjects/pack/pack-%s.pack",
455 repo->url, sha1_to_hex(target->sha1));
456
457 /* Make sure there isn't another open request for this pack */
458 while (check_request) {
459 if (check_request->state == RUN_FETCH_PACKED &&
460 !strcmp(check_request->url, url)) {
461 free(url);
462 release_request(request);
463 return;
464 }
465 check_request = check_request->next;
466 }
467
468 packfile = fopen(request->tmpfile, "a");
469 if (!packfile) {
470 fprintf(stderr, "Unable to open local file %s for pack",
471 request->tmpfile);
472 repo->can_update_info_refs = 0;
473 free(url);
474 return;
475 }
476
477 slot = get_active_slot();
478 slot->callback_func = process_response;
479 slot->callback_data = request;
480 request->slot = slot;
481 request->local_stream = packfile;
482 request->userData = target;
483
484 request->url = url;
485 curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
486 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
487 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
488 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
489 slot->local = packfile;
490
491 /* If there is data present from a previous transfer attempt,
492 resume where it left off */
493 prev_posn = ftell(packfile);
494 if (prev_posn>0) {
495 if (push_verbosely)
496 fprintf(stderr,
497 "Resuming fetch of pack %s at byte %ld\n",
498 sha1_to_hex(target->sha1), prev_posn);
499 sprintf(range, "Range: bytes=%ld-", prev_posn);
500 range_header = curl_slist_append(range_header, range);
501 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
502 }
503
504 /* Try to get the request started, abort the request on error */
505 request->state = RUN_FETCH_PACKED;
506 if (!start_active_slot(slot)) {
507 fprintf(stderr, "Unable to start GET request\n");
508 repo->can_update_info_refs = 0;
509 release_request(request);
510 }
511 }
512
513 static void start_put(struct transfer_request *request)
514 {
515 char *hex = sha1_to_hex(request->obj->sha1);
516 struct active_request_slot *slot;
517 struct strbuf buf = STRBUF_INIT;
518 enum object_type type;
519 char hdr[50];
520 void *unpacked;
521 unsigned long len;
522 int hdrlen;
523 ssize_t size;
524 z_stream stream;
525
526 unpacked = read_sha1_file(request->obj->sha1, &type, &len);
527 hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
528
529 /* Set it up */
530 memset(&stream, 0, sizeof(stream));
531 deflateInit(&stream, zlib_compression_level);
532 size = deflateBound(&stream, len + hdrlen);
533 strbuf_init(&request->buffer.buf, size);
534 request->buffer.posn = 0;
535
536 /* Compress it */
537 stream.next_out = (unsigned char *)request->buffer.buf.buf;
538 stream.avail_out = size;
539
540 /* First header.. */
541 stream.next_in = (void *)hdr;
542 stream.avail_in = hdrlen;
543 while (deflate(&stream, 0) == Z_OK)
544 /* nothing */;
545
546 /* Then the data itself.. */
547 stream.next_in = unpacked;
548 stream.avail_in = len;
549 while (deflate(&stream, Z_FINISH) == Z_OK)
550 /* nothing */;
551 deflateEnd(&stream);
552 free(unpacked);
553
554 request->buffer.buf.len = stream.total_out;
555
556 strbuf_addstr(&buf, "Destination: ");
557 append_remote_object_url(&buf, repo->url, hex, 0);
558 request->dest = strbuf_detach(&buf, NULL);
559
560 append_remote_object_url(&buf, repo->url, hex, 0);
561 strbuf_add(&buf, request->lock->tmpfile_suffix, 41);
562 request->url = strbuf_detach(&buf, NULL);
563
564 slot = get_active_slot();
565 slot->callback_func = process_response;
566 slot->callback_data = request;
567 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
568 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
569 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
570 #ifndef NO_CURL_IOCTL
571 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
572 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &request->buffer);
573 #endif
574 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
575 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
576 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
577 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
578 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
579 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
580
581 if (start_active_slot(slot)) {
582 request->slot = slot;
583 request->state = RUN_PUT;
584 } else {
585 request->state = ABORTED;
586 free(request->url);
587 request->url = NULL;
588 }
589 }
590
591 static void start_move(struct transfer_request *request)
592 {
593 struct active_request_slot *slot;
594 struct curl_slist *dav_headers = NULL;
595
596 slot = get_active_slot();
597 slot->callback_func = process_response;
598 slot->callback_data = request;
599 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
600 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
601 dav_headers = curl_slist_append(dav_headers, request->dest);
602 dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
603 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
604 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
605 curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
606
607 if (start_active_slot(slot)) {
608 request->slot = slot;
609 request->state = RUN_MOVE;
610 } else {
611 request->state = ABORTED;
612 free(request->url);
613 request->url = NULL;
614 }
615 }
616
617 static int refresh_lock(struct remote_lock *lock)
618 {
619 struct active_request_slot *slot;
620 struct slot_results results;
621 struct curl_slist *dav_headers;
622 int rc = 0;
623
624 lock->refreshing = 1;
625
626 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
627
628 slot = get_active_slot();
629 slot->results = &results;
630 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
631 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
632 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
633 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
634 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
635
636 if (start_active_slot(slot)) {
637 run_active_slot(slot);
638 if (results.curl_result != CURLE_OK) {
639 fprintf(stderr, "LOCK HTTP error %ld\n",
640 results.http_code);
641 } else {
642 lock->start_time = time(NULL);
643 rc = 1;
644 }
645 }
646
647 lock->refreshing = 0;
648 curl_slist_free_all(dav_headers);
649
650 return rc;
651 }
652
653 static void check_locks(void)
654 {
655 struct remote_lock *lock = repo->locks;
656 time_t current_time = time(NULL);
657 int time_remaining;
658
659 while (lock) {
660 time_remaining = lock->start_time + lock->timeout -
661 current_time;
662 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
663 if (!refresh_lock(lock)) {
664 fprintf(stderr,
665 "Unable to refresh lock for %s\n",
666 lock->url);
667 aborted = 1;
668 return;
669 }
670 }
671 lock = lock->next;
672 }
673 }
674
675 static void release_request(struct transfer_request *request)
676 {
677 struct transfer_request *entry = request_queue_head;
678
679 if (request == request_queue_head) {
680 request_queue_head = request->next;
681 } else {
682 while (entry->next != NULL && entry->next != request)
683 entry = entry->next;
684 if (entry->next == request)
685 entry->next = entry->next->next;
686 }
687
688 if (request->local_fileno != -1)
689 close(request->local_fileno);
690 if (request->local_stream)
691 fclose(request->local_stream);
692 free(request->url);
693 free(request);
694 }
695
696 static void finish_request(struct transfer_request *request)
697 {
698 struct stat st;
699 struct packed_git *target;
700 struct packed_git **lst;
701
702 request->curl_result = request->slot->curl_result;
703 request->http_code = request->slot->http_code;
704 request->slot = NULL;
705
706 /* Keep locks active */
707 check_locks();
708
709 if (request->headers != NULL)
710 curl_slist_free_all(request->headers);
711
712 /* URL is reused for MOVE after PUT */
713 if (request->state != RUN_PUT) {
714 free(request->url);
715 request->url = NULL;
716 }
717
718 if (request->state == RUN_MKCOL) {
719 if (request->curl_result == CURLE_OK ||
720 request->http_code == 405) {
721 remote_dir_exists[request->obj->sha1[0]] = 1;
722 start_put(request);
723 } else {
724 fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
725 sha1_to_hex(request->obj->sha1),
726 request->curl_result, request->http_code);
727 request->state = ABORTED;
728 aborted = 1;
729 }
730 } else if (request->state == RUN_PUT) {
731 if (request->curl_result == CURLE_OK) {
732 start_move(request);
733 } else {
734 fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
735 sha1_to_hex(request->obj->sha1),
736 request->curl_result, request->http_code);
737 request->state = ABORTED;
738 aborted = 1;
739 }
740 } else if (request->state == RUN_MOVE) {
741 if (request->curl_result == CURLE_OK) {
742 if (push_verbosely)
743 fprintf(stderr, " sent %s\n",
744 sha1_to_hex(request->obj->sha1));
745 request->obj->flags |= REMOTE;
746 release_request(request);
747 } else {
748 fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
749 sha1_to_hex(request->obj->sha1),
750 request->curl_result, request->http_code);
751 request->state = ABORTED;
752 aborted = 1;
753 }
754 } else if (request->state == RUN_FETCH_LOOSE) {
755 close(request->local_fileno); request->local_fileno = -1;
756
757 if (request->curl_result != CURLE_OK &&
758 request->http_code != 416) {
759 if (stat(request->tmpfile, &st) == 0) {
760 if (st.st_size == 0)
761 unlink(request->tmpfile);
762 }
763 } else {
764 if (request->http_code == 416)
765 warning("requested range invalid; we may already have all the data.");
766
767 git_inflate_end(&request->stream);
768 git_SHA1_Final(request->real_sha1, &request->c);
769 if (request->zret != Z_STREAM_END) {
770 unlink(request->tmpfile);
771 } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
772 unlink(request->tmpfile);
773 } else {
774 request->rename =
775 move_temp_to_file(
776 request->tmpfile,
777 request->filename);
778 if (request->rename == 0) {
779 request->obj->flags |= (LOCAL | REMOTE);
780 }
781 }
782 }
783
784 /* Try fetching packed if necessary */
785 if (request->obj->flags & LOCAL)
786 release_request(request);
787 else
788 start_fetch_packed(request);
789
790 } else if (request->state == RUN_FETCH_PACKED) {
791 if (request->curl_result != CURLE_OK) {
792 fprintf(stderr, "Unable to get pack file %s\n%s",
793 request->url, curl_errorstr);
794 repo->can_update_info_refs = 0;
795 } else {
796 off_t pack_size = ftell(request->local_stream);
797
798 fclose(request->local_stream);
799 request->local_stream = NULL;
800 if (!move_temp_to_file(request->tmpfile,
801 request->filename)) {
802 target = (struct packed_git *)request->userData;
803 target->pack_size = pack_size;
804 lst = &repo->packs;
805 while (*lst != target)
806 lst = &((*lst)->next);
807 *lst = (*lst)->next;
808
809 if (!verify_pack(target))
810 install_packed_git(target);
811 else
812 repo->can_update_info_refs = 0;
813 }
814 }
815 release_request(request);
816 }
817 }
818
819 #ifdef USE_CURL_MULTI
820 static int fill_active_slot(void *unused)
821 {
822 struct transfer_request *request;
823
824 if (aborted)
825 return 0;
826
827 for (request = request_queue_head; request; request = request->next) {
828 if (request->state == NEED_FETCH) {
829 start_fetch_loose(request);
830 return 1;
831 } else if (pushing && request->state == NEED_PUSH) {
832 if (remote_dir_exists[request->obj->sha1[0]] == 1) {
833 start_put(request);
834 } else {
835 start_mkcol(request);
836 }
837 return 1;
838 }
839 }
840 return 0;
841 }
842 #endif
843
844 static void get_remote_object_list(unsigned char parent);
845
846 static void add_fetch_request(struct object *obj)
847 {
848 struct transfer_request *request;
849
850 check_locks();
851
852 /*
853 * Don't fetch the object if it's known to exist locally
854 * or is already in the request queue
855 */
856 if (remote_dir_exists[obj->sha1[0]] == -1)
857 get_remote_object_list(obj->sha1[0]);
858 if (obj->flags & (LOCAL | FETCHING))
859 return;
860
861 obj->flags |= FETCHING;
862 request = xmalloc(sizeof(*request));
863 request->obj = obj;
864 request->url = NULL;
865 request->lock = NULL;
866 request->headers = NULL;
867 request->local_fileno = -1;
868 request->local_stream = NULL;
869 request->state = NEED_FETCH;
870 request->next = request_queue_head;
871 request_queue_head = request;
872
873 #ifdef USE_CURL_MULTI
874 fill_active_slots();
875 step_active_slots();
876 #endif
877 }
878
879 static int add_send_request(struct object *obj, struct remote_lock *lock)
880 {
881 struct transfer_request *request = request_queue_head;
882 struct packed_git *target;
883
884 /* Keep locks active */
885 check_locks();
886
887 /*
888 * Don't push the object if it's known to exist on the remote
889 * or is already in the request queue
890 */
891 if (remote_dir_exists[obj->sha1[0]] == -1)
892 get_remote_object_list(obj->sha1[0]);
893 if (obj->flags & (REMOTE | PUSHING))
894 return 0;
895 target = find_sha1_pack(obj->sha1, repo->packs);
896 if (target) {
897 obj->flags |= REMOTE;
898 return 0;
899 }
900
901 obj->flags |= PUSHING;
902 request = xmalloc(sizeof(*request));
903 request->obj = obj;
904 request->url = NULL;
905 request->lock = lock;
906 request->headers = NULL;
907 request->local_fileno = -1;
908 request->local_stream = NULL;
909 request->state = NEED_PUSH;
910 request->next = request_queue_head;
911 request_queue_head = request;
912
913 #ifdef USE_CURL_MULTI
914 fill_active_slots();
915 step_active_slots();
916 #endif
917
918 return 1;
919 }
920
921 static int fetch_index(unsigned char *sha1)
922 {
923 char *hex = sha1_to_hex(sha1);
924 char *filename;
925 char *url;
926 char tmpfile[PATH_MAX];
927 long prev_posn = 0;
928 char range[RANGE_HEADER_SIZE];
929 struct curl_slist *range_header = NULL;
930
931 FILE *indexfile;
932 struct active_request_slot *slot;
933 struct slot_results results;
934
935 /* Don't use the index if the pack isn't there */
936 url = xmalloc(strlen(repo->url) + 64);
937 sprintf(url, "%sobjects/pack/pack-%s.pack", repo->url, hex);
938 slot = get_active_slot();
939 slot->results = &results;
940 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
941 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
942 if (start_active_slot(slot)) {
943 run_active_slot(slot);
944 if (results.curl_result != CURLE_OK) {
945 free(url);
946 return error("Unable to verify pack %s is available",
947 hex);
948 }
949 } else {
950 free(url);
951 return error("Unable to start request");
952 }
953
954 if (has_pack_index(sha1)) {
955 free(url);
956 return 0;
957 }
958
959 if (push_verbosely)
960 fprintf(stderr, "Getting index for pack %s\n", hex);
961
962 sprintf(url, "%sobjects/pack/pack-%s.idx", repo->url, hex);
963
964 filename = sha1_pack_index_name(sha1);
965 snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
966 indexfile = fopen(tmpfile, "a");
967 if (!indexfile) {
968 free(url);
969 return error("Unable to open local file %s for pack index",
970 tmpfile);
971 }
972
973 slot = get_active_slot();
974 slot->results = &results;
975 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
976 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
977 curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
978 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
979 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
980 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
981 slot->local = indexfile;
982
983 /* If there is data present from a previous transfer attempt,
984 resume where it left off */
985 prev_posn = ftell(indexfile);
986 if (prev_posn>0) {
987 if (push_verbosely)
988 fprintf(stderr,
989 "Resuming fetch of index for pack %s at byte %ld\n",
990 hex, prev_posn);
991 sprintf(range, "Range: bytes=%ld-", prev_posn);
992 range_header = curl_slist_append(range_header, range);
993 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
994 }
995
996 if (start_active_slot(slot)) {
997 run_active_slot(slot);
998 if (results.curl_result != CURLE_OK) {
999 free(url);
1000 fclose(indexfile);
1001 return error("Unable to get pack index %s\n%s", url,
1002 curl_errorstr);
1003 }
1004 } else {
1005 free(url);
1006 fclose(indexfile);
1007 return error("Unable to start request");
1008 }
1009
1010 free(url);
1011 fclose(indexfile);
1012
1013 return move_temp_to_file(tmpfile, filename);
1014 }
1015
1016 static int setup_index(unsigned char *sha1)
1017 {
1018 struct packed_git *new_pack;
1019
1020 if (fetch_index(sha1))
1021 return -1;
1022
1023 new_pack = parse_pack_index(sha1);
1024 new_pack->next = repo->packs;
1025 repo->packs = new_pack;
1026 return 0;
1027 }
1028
1029 static int fetch_indices(void)
1030 {
1031 unsigned char sha1[20];
1032 char *url;
1033 struct strbuf buffer = STRBUF_INIT;
1034 char *data;
1035 int i = 0;
1036
1037 struct active_request_slot *slot;
1038 struct slot_results results;
1039
1040 if (push_verbosely)
1041 fprintf(stderr, "Getting pack list\n");
1042
1043 url = xmalloc(strlen(repo->url) + 20);
1044 sprintf(url, "%sobjects/info/packs", repo->url);
1045
1046 slot = get_active_slot();
1047 slot->results = &results;
1048 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1049 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1050 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1051 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1052 if (start_active_slot(slot)) {
1053 run_active_slot(slot);
1054 if (results.curl_result != CURLE_OK) {
1055 strbuf_release(&buffer);
1056 free(url);
1057 if (results.http_code == 404)
1058 return 0;
1059 else
1060 return error("%s", curl_errorstr);
1061 }
1062 } else {
1063 strbuf_release(&buffer);
1064 free(url);
1065 return error("Unable to start request");
1066 }
1067 free(url);
1068
1069 data = buffer.buf;
1070 while (i < buffer.len) {
1071 switch (data[i]) {
1072 case 'P':
1073 i++;
1074 if (i + 52 < buffer.len &&
1075 !prefixcmp(data + i, " pack-") &&
1076 !prefixcmp(data + i + 46, ".pack\n")) {
1077 get_sha1_hex(data + i + 6, sha1);
1078 setup_index(sha1);
1079 i += 51;
1080 break;
1081 }
1082 default:
1083 while (data[i] != '\n')
1084 i++;
1085 }
1086 i++;
1087 }
1088
1089 strbuf_release(&buffer);
1090 return 0;
1091 }
1092
1093 static void one_remote_object(const char *hex)
1094 {
1095 unsigned char sha1[20];
1096 struct object *obj;
1097
1098 if (get_sha1_hex(hex, sha1) != 0)
1099 return;
1100
1101 obj = lookup_object(sha1);
1102 if (!obj)
1103 obj = parse_object(sha1);
1104
1105 /* Ignore remote objects that don't exist locally */
1106 if (!obj)
1107 return;
1108
1109 obj->flags |= REMOTE;
1110 if (!object_list_contains(objects, obj))
1111 object_list_insert(obj, &objects);
1112 }
1113
1114 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1115 {
1116 int *lock_flags = (int *)ctx->userData;
1117
1118 if (tag_closed) {
1119 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1120 if ((*lock_flags & DAV_PROP_LOCKEX) &&
1121 (*lock_flags & DAV_PROP_LOCKWR)) {
1122 *lock_flags |= DAV_LOCK_OK;
1123 }
1124 *lock_flags &= DAV_LOCK_OK;
1125 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1126 *lock_flags |= DAV_PROP_LOCKWR;
1127 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1128 *lock_flags |= DAV_PROP_LOCKEX;
1129 }
1130 }
1131 }
1132
1133 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1134 {
1135 struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1136 git_SHA_CTX sha_ctx;
1137 unsigned char lock_token_sha1[20];
1138
1139 if (tag_closed && ctx->cdata) {
1140 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1141 lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1142 strcpy(lock->owner, ctx->cdata);
1143 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1144 if (!prefixcmp(ctx->cdata, "Second-"))
1145 lock->timeout =
1146 strtol(ctx->cdata + 7, NULL, 10);
1147 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1148 lock->token = xmalloc(strlen(ctx->cdata) + 1);
1149 strcpy(lock->token, ctx->cdata);
1150
1151 git_SHA1_Init(&sha_ctx);
1152 git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token));
1153 git_SHA1_Final(lock_token_sha1, &sha_ctx);
1154
1155 lock->tmpfile_suffix[0] = '_';
1156 memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40);
1157 }
1158 }
1159 }
1160
1161 static void one_remote_ref(char *refname);
1162
1163 static void
1164 xml_start_tag(void *userData, const char *name, const char **atts)
1165 {
1166 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1167 const char *c = strchr(name, ':');
1168 int new_len;
1169
1170 if (c == NULL)
1171 c = name;
1172 else
1173 c++;
1174
1175 new_len = strlen(ctx->name) + strlen(c) + 2;
1176
1177 if (new_len > ctx->len) {
1178 ctx->name = xrealloc(ctx->name, new_len);
1179 ctx->len = new_len;
1180 }
1181 strcat(ctx->name, ".");
1182 strcat(ctx->name, c);
1183
1184 free(ctx->cdata);
1185 ctx->cdata = NULL;
1186
1187 ctx->userFunc(ctx, 0);
1188 }
1189
1190 static void
1191 xml_end_tag(void *userData, const char *name)
1192 {
1193 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1194 const char *c = strchr(name, ':');
1195 char *ep;
1196
1197 ctx->userFunc(ctx, 1);
1198
1199 if (c == NULL)
1200 c = name;
1201 else
1202 c++;
1203
1204 ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1205 *ep = 0;
1206 }
1207
1208 static void
1209 xml_cdata(void *userData, const XML_Char *s, int len)
1210 {
1211 struct xml_ctx *ctx = (struct xml_ctx *)userData;
1212 free(ctx->cdata);
1213 ctx->cdata = xmemdupz(s, len);
1214 }
1215
1216 static struct remote_lock *lock_remote(const char *path, long timeout)
1217 {
1218 struct active_request_slot *slot;
1219 struct slot_results results;
1220 struct buffer out_buffer = { STRBUF_INIT, 0 };
1221 struct strbuf in_buffer = STRBUF_INIT;
1222 char *url;
1223 char *ep;
1224 char timeout_header[25];
1225 struct remote_lock *lock = NULL;
1226 struct curl_slist *dav_headers = NULL;
1227 struct xml_ctx ctx;
1228
1229 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1230 sprintf(url, "%s%s", repo->url, path);
1231
1232 /* Make sure leading directories exist for the remote ref */
1233 ep = strchr(url + strlen(repo->url) + 1, '/');
1234 while (ep) {
1235 char saved_character = ep[1];
1236 ep[1] = '\0';
1237 slot = get_active_slot();
1238 slot->results = &results;
1239 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1240 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1241 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1242 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1243 if (start_active_slot(slot)) {
1244 run_active_slot(slot);
1245 if (results.curl_result != CURLE_OK &&
1246 results.http_code != 405) {
1247 fprintf(stderr,
1248 "Unable to create branch path %s\n",
1249 url);
1250 free(url);
1251 return NULL;
1252 }
1253 } else {
1254 fprintf(stderr, "Unable to start MKCOL request\n");
1255 free(url);
1256 return NULL;
1257 }
1258 ep[1] = saved_character;
1259 ep = strchr(ep + 1, '/');
1260 }
1261
1262 strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1263
1264 sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1265 dav_headers = curl_slist_append(dav_headers, timeout_header);
1266 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1267
1268 slot = get_active_slot();
1269 slot->results = &results;
1270 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1271 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1272 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1273 #ifndef NO_CURL_IOCTL
1274 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1275 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1276 #endif
1277 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1278 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1279 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1280 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1281 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1282 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1283
1284 lock = xcalloc(1, sizeof(*lock));
1285 lock->timeout = -1;
1286
1287 if (start_active_slot(slot)) {
1288 run_active_slot(slot);
1289 if (results.curl_result == CURLE_OK) {
1290 XML_Parser parser = XML_ParserCreate(NULL);
1291 enum XML_Status result;
1292 ctx.name = xcalloc(10, 1);
1293 ctx.len = 0;
1294 ctx.cdata = NULL;
1295 ctx.userFunc = handle_new_lock_ctx;
1296 ctx.userData = lock;
1297 XML_SetUserData(parser, &ctx);
1298 XML_SetElementHandler(parser, xml_start_tag,
1299 xml_end_tag);
1300 XML_SetCharacterDataHandler(parser, xml_cdata);
1301 result = XML_Parse(parser, in_buffer.buf,
1302 in_buffer.len, 1);
1303 free(ctx.name);
1304 if (result != XML_STATUS_OK) {
1305 fprintf(stderr, "XML error: %s\n",
1306 XML_ErrorString(
1307 XML_GetErrorCode(parser)));
1308 lock->timeout = -1;
1309 }
1310 XML_ParserFree(parser);
1311 }
1312 } else {
1313 fprintf(stderr, "Unable to start LOCK request\n");
1314 }
1315
1316 curl_slist_free_all(dav_headers);
1317 strbuf_release(&out_buffer.buf);
1318 strbuf_release(&in_buffer);
1319
1320 if (lock->token == NULL || lock->timeout <= 0) {
1321 free(lock->token);
1322 free(lock->owner);
1323 free(url);
1324 free(lock);
1325 lock = NULL;
1326 } else {
1327 lock->url = url;
1328 lock->start_time = time(NULL);
1329 lock->next = repo->locks;
1330 repo->locks = lock;
1331 }
1332
1333 return lock;
1334 }
1335
1336 static int unlock_remote(struct remote_lock *lock)
1337 {
1338 struct active_request_slot *slot;
1339 struct slot_results results;
1340 struct remote_lock *prev = repo->locks;
1341 struct curl_slist *dav_headers;
1342 int rc = 0;
1343
1344 dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
1345
1346 slot = get_active_slot();
1347 slot->results = &results;
1348 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1349 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1350 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1351 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1352
1353 if (start_active_slot(slot)) {
1354 run_active_slot(slot);
1355 if (results.curl_result == CURLE_OK)
1356 rc = 1;
1357 else
1358 fprintf(stderr, "UNLOCK HTTP error %ld\n",
1359 results.http_code);
1360 } else {
1361 fprintf(stderr, "Unable to start UNLOCK request\n");
1362 }
1363
1364 curl_slist_free_all(dav_headers);
1365
1366 if (repo->locks == lock) {
1367 repo->locks = lock->next;
1368 } else {
1369 while (prev && prev->next != lock)
1370 prev = prev->next;
1371 if (prev)
1372 prev->next = prev->next->next;
1373 }
1374
1375 free(lock->owner);
1376 free(lock->url);
1377 free(lock->token);
1378 free(lock);
1379
1380 return rc;
1381 }
1382
1383 static void remove_locks(void)
1384 {
1385 struct remote_lock *lock = repo->locks;
1386
1387 fprintf(stderr, "Removing remote locks...\n");
1388 while (lock) {
1389 unlock_remote(lock);
1390 lock = lock->next;
1391 }
1392 }
1393
1394 static void remove_locks_on_signal(int signo)
1395 {
1396 remove_locks();
1397 sigchain_pop(signo);
1398 raise(signo);
1399 }
1400
1401 static void remote_ls(const char *path, int flags,
1402 void (*userFunc)(struct remote_ls_ctx *ls),
1403 void *userData);
1404
1405 static void process_ls_object(struct remote_ls_ctx *ls)
1406 {
1407 unsigned int *parent = (unsigned int *)ls->userData;
1408 char *path = ls->dentry_name;
1409 char *obj_hex;
1410
1411 if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1412 remote_dir_exists[*parent] = 1;
1413 return;
1414 }
1415
1416 if (strlen(path) != 49)
1417 return;
1418 path += 8;
1419 obj_hex = xmalloc(strlen(path));
1420 /* NB: path is not null-terminated, can not use strlcpy here */
1421 memcpy(obj_hex, path, 2);
1422 strcpy(obj_hex + 2, path + 3);
1423 one_remote_object(obj_hex);
1424 free(obj_hex);
1425 }
1426
1427 static void process_ls_ref(struct remote_ls_ctx *ls)
1428 {
1429 if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1430 fprintf(stderr, " %s\n", ls->dentry_name);
1431 return;
1432 }
1433
1434 if (!(ls->dentry_flags & IS_DIR))
1435 one_remote_ref(ls->dentry_name);
1436 }
1437
1438 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1439 {
1440 struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1441
1442 if (tag_closed) {
1443 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1444 if (ls->dentry_flags & IS_DIR) {
1445 if (ls->flags & PROCESS_DIRS) {
1446 ls->userFunc(ls);
1447 }
1448 if (strcmp(ls->dentry_name, ls->path) &&
1449 ls->flags & RECURSIVE) {
1450 remote_ls(ls->dentry_name,
1451 ls->flags,
1452 ls->userFunc,
1453 ls->userData);
1454 }
1455 } else if (ls->flags & PROCESS_FILES) {
1456 ls->userFunc(ls);
1457 }
1458 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1459 char *path = ctx->cdata;
1460 if (*ctx->cdata == 'h') {
1461 path = strstr(path, "//");
1462 if (path) {
1463 path = strchr(path+2, '/');
1464 }
1465 }
1466 if (path) {
1467 path += repo->path_len;
1468 ls->dentry_name = xstrdup(path);
1469 }
1470 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1471 ls->dentry_flags |= IS_DIR;
1472 }
1473 } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1474 free(ls->dentry_name);
1475 ls->dentry_name = NULL;
1476 ls->dentry_flags = 0;
1477 }
1478 }
1479
1480 /*
1481 * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it
1482 * should _only_ heed the information from that file, instead of trying to
1483 * determine the refs from the remote file system (badly: it does not even
1484 * know about packed-refs).
1485 */
1486 static void remote_ls(const char *path, int flags,
1487 void (*userFunc)(struct remote_ls_ctx *ls),
1488 void *userData)
1489 {
1490 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1491 struct active_request_slot *slot;
1492 struct slot_results results;
1493 struct strbuf in_buffer = STRBUF_INIT;
1494 struct buffer out_buffer = { STRBUF_INIT, 0 };
1495 struct curl_slist *dav_headers = NULL;
1496 struct xml_ctx ctx;
1497 struct remote_ls_ctx ls;
1498
1499 ls.flags = flags;
1500 ls.path = xstrdup(path);
1501 ls.dentry_name = NULL;
1502 ls.dentry_flags = 0;
1503 ls.userData = userData;
1504 ls.userFunc = userFunc;
1505
1506 sprintf(url, "%s%s", repo->url, path);
1507
1508 strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1509
1510 dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1511 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1512
1513 slot = get_active_slot();
1514 slot->results = &results;
1515 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1516 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1517 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1518 #ifndef NO_CURL_IOCTL
1519 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1520 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1521 #endif
1522 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1523 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1524 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1525 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1526 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1527 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1528
1529 if (start_active_slot(slot)) {
1530 run_active_slot(slot);
1531 if (results.curl_result == CURLE_OK) {
1532 XML_Parser parser = XML_ParserCreate(NULL);
1533 enum XML_Status result;
1534 ctx.name = xcalloc(10, 1);
1535 ctx.len = 0;
1536 ctx.cdata = NULL;
1537 ctx.userFunc = handle_remote_ls_ctx;
1538 ctx.userData = &ls;
1539 XML_SetUserData(parser, &ctx);
1540 XML_SetElementHandler(parser, xml_start_tag,
1541 xml_end_tag);
1542 XML_SetCharacterDataHandler(parser, xml_cdata);
1543 result = XML_Parse(parser, in_buffer.buf,
1544 in_buffer.len, 1);
1545 free(ctx.name);
1546
1547 if (result != XML_STATUS_OK) {
1548 fprintf(stderr, "XML error: %s\n",
1549 XML_ErrorString(
1550 XML_GetErrorCode(parser)));
1551 }
1552 XML_ParserFree(parser);
1553 }
1554 } else {
1555 fprintf(stderr, "Unable to start PROPFIND request\n");
1556 }
1557
1558 free(ls.path);
1559 free(url);
1560 strbuf_release(&out_buffer.buf);
1561 strbuf_release(&in_buffer);
1562 curl_slist_free_all(dav_headers);
1563 }
1564
1565 static void get_remote_object_list(unsigned char parent)
1566 {
1567 char path[] = "objects/XX/";
1568 static const char hex[] = "0123456789abcdef";
1569 unsigned int val = parent;
1570
1571 path[8] = hex[val >> 4];
1572 path[9] = hex[val & 0xf];
1573 remote_dir_exists[val] = 0;
1574 remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1575 process_ls_object, &val);
1576 }
1577
1578 static int locking_available(void)
1579 {
1580 struct active_request_slot *slot;
1581 struct slot_results results;
1582 struct strbuf in_buffer = STRBUF_INIT;
1583 struct buffer out_buffer = { STRBUF_INIT, 0 };
1584 struct curl_slist *dav_headers = NULL;
1585 struct xml_ctx ctx;
1586 int lock_flags = 0;
1587
1588 strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, repo->url);
1589
1590 dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1591 dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1592
1593 slot = get_active_slot();
1594 slot->results = &results;
1595 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1596 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1597 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1598 #ifndef NO_CURL_IOCTL
1599 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1600 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1601 #endif
1602 curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1603 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1604 curl_easy_setopt(slot->curl, CURLOPT_URL, repo->url);
1605 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1606 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1607 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1608
1609 if (start_active_slot(slot)) {
1610 run_active_slot(slot);
1611 if (results.curl_result == CURLE_OK) {
1612 XML_Parser parser = XML_ParserCreate(NULL);
1613 enum XML_Status result;
1614 ctx.name = xcalloc(10, 1);
1615 ctx.len = 0;
1616 ctx.cdata = NULL;
1617 ctx.userFunc = handle_lockprop_ctx;
1618 ctx.userData = &lock_flags;
1619 XML_SetUserData(parser, &ctx);
1620 XML_SetElementHandler(parser, xml_start_tag,
1621 xml_end_tag);
1622 result = XML_Parse(parser, in_buffer.buf,
1623 in_buffer.len, 1);
1624 free(ctx.name);
1625
1626 if (result != XML_STATUS_OK) {
1627 fprintf(stderr, "XML error: %s\n",
1628 XML_ErrorString(
1629 XML_GetErrorCode(parser)));
1630 lock_flags = 0;
1631 }
1632 XML_ParserFree(parser);
1633 if (!lock_flags)
1634 error("no DAV locking support on %s",
1635 repo->url);
1636
1637 } else {
1638 error("Cannot access URL %s, return code %d",
1639 repo->url, results.curl_result);
1640 lock_flags = 0;
1641 }
1642 } else {
1643 error("Unable to start PROPFIND request on %s", repo->url);
1644 }
1645
1646 strbuf_release(&out_buffer.buf);
1647 strbuf_release(&in_buffer);
1648 curl_slist_free_all(dav_headers);
1649
1650 return lock_flags;
1651 }
1652
1653 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1654 {
1655 struct object_list *entry = xmalloc(sizeof(struct object_list));
1656 entry->item = obj;
1657 entry->next = *p;
1658 *p = entry;
1659 return &entry->next;
1660 }
1661
1662 static struct object_list **process_blob(struct blob *blob,
1663 struct object_list **p,
1664 struct name_path *path,
1665 const char *name)
1666 {
1667 struct object *obj = &blob->object;
1668
1669 obj->flags |= LOCAL;
1670
1671 if (obj->flags & (UNINTERESTING | SEEN))
1672 return p;
1673
1674 obj->flags |= SEEN;
1675 return add_one_object(obj, p);
1676 }
1677
1678 static struct object_list **process_tree(struct tree *tree,
1679 struct object_list **p,
1680 struct name_path *path,
1681 const char *name)
1682 {
1683 struct object *obj = &tree->object;
1684 struct tree_desc desc;
1685 struct name_entry entry;
1686 struct name_path me;
1687
1688 obj->flags |= LOCAL;
1689
1690 if (obj->flags & (UNINTERESTING | SEEN))
1691 return p;
1692 if (parse_tree(tree) < 0)
1693 die("bad tree object %s", sha1_to_hex(obj->sha1));
1694
1695 obj->flags |= SEEN;
1696 name = xstrdup(name);
1697 p = add_one_object(obj, p);
1698 me.up = path;
1699 me.elem = name;
1700 me.elem_len = strlen(name);
1701
1702 init_tree_desc(&desc, tree->buffer, tree->size);
1703
1704 while (tree_entry(&desc, &entry))
1705 switch (object_type(entry.mode)) {
1706 case OBJ_TREE:
1707 p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1708 break;
1709 case OBJ_BLOB:
1710 p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1711 break;
1712 default:
1713 /* Subproject commit - not in this repository */
1714 break;
1715 }
1716
1717 free(tree->buffer);
1718 tree->buffer = NULL;
1719 return p;
1720 }
1721
1722 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1723 {
1724 int i;
1725 struct commit *commit;
1726 struct object_list **p = &objects;
1727 int count = 0;
1728
1729 while ((commit = get_revision(revs)) != NULL) {
1730 p = process_tree(commit->tree, p, NULL, "");
1731 commit->object.flags |= LOCAL;
1732 if (!(commit->object.flags & UNINTERESTING))
1733 count += add_send_request(&commit->object, lock);
1734 }
1735
1736 for (i = 0; i < revs->pending.nr; i++) {
1737 struct object_array_entry *entry = revs->pending.objects + i;
1738 struct object *obj = entry->item;
1739 const char *name = entry->name;
1740
1741 if (obj->flags & (UNINTERESTING | SEEN))
1742 continue;
1743 if (obj->type == OBJ_TAG) {
1744 obj->flags |= SEEN;
1745 p = add_one_object(obj, p);
1746 continue;
1747 }
1748 if (obj->type == OBJ_TREE) {
1749 p = process_tree((struct tree *)obj, p, NULL, name);
1750 continue;
1751 }
1752 if (obj->type == OBJ_BLOB) {
1753 p = process_blob((struct blob *)obj, p, NULL, name);
1754 continue;
1755 }
1756 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1757 }
1758
1759 while (objects) {
1760 if (!(objects->item->flags & UNINTERESTING))
1761 count += add_send_request(objects->item, lock);
1762 objects = objects->next;
1763 }
1764
1765 return count;
1766 }
1767
1768 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1769 {
1770 struct active_request_slot *slot;
1771 struct slot_results results;
1772 struct buffer out_buffer = { STRBUF_INIT, 0 };
1773 struct curl_slist *dav_headers;
1774
1775 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1776
1777 strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1778
1779 slot = get_active_slot();
1780 slot->results = &results;
1781 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1782 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1783 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1784 #ifndef NO_CURL_IOCTL
1785 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1786 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &out_buffer);
1787 #endif
1788 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1789 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1790 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1791 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1792 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1793 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1794
1795 if (start_active_slot(slot)) {
1796 run_active_slot(slot);
1797 strbuf_release(&out_buffer.buf);
1798 if (results.curl_result != CURLE_OK) {
1799 fprintf(stderr,
1800 "PUT error: curl result=%d, HTTP code=%ld\n",
1801 results.curl_result, results.http_code);
1802 /* We should attempt recovery? */
1803 return 0;
1804 }
1805 } else {
1806 strbuf_release(&out_buffer.buf);
1807 fprintf(stderr, "Unable to start PUT request\n");
1808 return 0;
1809 }
1810
1811 return 1;
1812 }
1813
1814 static struct ref *remote_refs, **remote_tail;
1815
1816 static void one_remote_ref(char *refname)
1817 {
1818 struct ref *ref;
1819 struct object *obj;
1820
1821 ref = alloc_ref(refname);
1822
1823 if (http_fetch_ref(repo->url, ref) != 0) {
1824 fprintf(stderr,
1825 "Unable to fetch ref %s from %s\n",
1826 refname, repo->url);
1827 free(ref);
1828 return;
1829 }
1830
1831 /*
1832 * Fetch a copy of the object if it doesn't exist locally - it
1833 * may be required for updating server info later.
1834 */
1835 if (repo->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1836 obj = lookup_unknown_object(ref->old_sha1);
1837 if (obj) {
1838 fprintf(stderr, " fetch %s for %s\n",
1839 sha1_to_hex(ref->old_sha1), refname);
1840 add_fetch_request(obj);
1841 }
1842 }
1843
1844 *remote_tail = ref;
1845 remote_tail = &ref->next;
1846 }
1847
1848 static void get_dav_remote_heads(void)
1849 {
1850 remote_tail = &remote_refs;
1851 remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1852 }
1853
1854 static int is_zero_sha1(const unsigned char *sha1)
1855 {
1856 int i;
1857
1858 for (i = 0; i < 20; i++) {
1859 if (*sha1++)
1860 return 0;
1861 }
1862 return 1;
1863 }
1864
1865 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1866 {
1867 struct strbuf *buf = (struct strbuf *)ls->userData;
1868 struct object *o;
1869 int len;
1870 char *ref_info;
1871 struct ref *ref;
1872
1873 ref = alloc_ref(ls->dentry_name);
1874
1875 if (http_fetch_ref(repo->url, ref) != 0) {
1876 fprintf(stderr,
1877 "Unable to fetch ref %s from %s\n",
1878 ls->dentry_name, repo->url);
1879 aborted = 1;
1880 free(ref);
1881 return;
1882 }
1883
1884 o = parse_object(ref->old_sha1);
1885 if (!o) {
1886 fprintf(stderr,
1887 "Unable to parse object %s for remote ref %s\n",
1888 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1889 aborted = 1;
1890 free(ref);
1891 return;
1892 }
1893
1894 len = strlen(ls->dentry_name) + 42;
1895 ref_info = xcalloc(len + 1, 1);
1896 sprintf(ref_info, "%s %s\n",
1897 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1898 fwrite_buffer(ref_info, 1, len, buf);
1899 free(ref_info);
1900
1901 if (o->type == OBJ_TAG) {
1902 o = deref_tag(o, ls->dentry_name, 0);
1903 if (o) {
1904 len = strlen(ls->dentry_name) + 45;
1905 ref_info = xcalloc(len + 1, 1);
1906 sprintf(ref_info, "%s %s^{}\n",
1907 sha1_to_hex(o->sha1), ls->dentry_name);
1908 fwrite_buffer(ref_info, 1, len, buf);
1909 free(ref_info);
1910 }
1911 }
1912 free(ref);
1913 }
1914
1915 static void update_remote_info_refs(struct remote_lock *lock)
1916 {
1917 struct buffer buffer = { STRBUF_INIT, 0 };
1918 struct active_request_slot *slot;
1919 struct slot_results results;
1920 struct curl_slist *dav_headers;
1921
1922 remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1923 add_remote_info_ref, &buffer.buf);
1924 if (!aborted) {
1925 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1926
1927 slot = get_active_slot();
1928 slot->results = &results;
1929 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1930 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1931 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1932 #ifndef NO_CURL_IOCTL
1933 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, ioctl_buffer);
1934 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, &buffer);
1935 #endif
1936 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1937 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1938 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1939 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1940 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1941 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1942
1943 if (start_active_slot(slot)) {
1944 run_active_slot(slot);
1945 if (results.curl_result != CURLE_OK) {
1946 fprintf(stderr,
1947 "PUT error: curl result=%d, HTTP code=%ld\n",
1948 results.curl_result, results.http_code);
1949 }
1950 }
1951 }
1952 strbuf_release(&buffer.buf);
1953 }
1954
1955 static int remote_exists(const char *path)
1956 {
1957 char *url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1958 struct active_request_slot *slot;
1959 struct slot_results results;
1960 int ret = -1;
1961
1962 sprintf(url, "%s%s", repo->url, path);
1963
1964 slot = get_active_slot();
1965 slot->results = &results;
1966 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1967 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1968
1969 if (start_active_slot(slot)) {
1970 run_active_slot(slot);
1971 if (results.http_code == 404)
1972 ret = 0;
1973 else if (results.curl_result == CURLE_OK)
1974 ret = 1;
1975 else
1976 fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
1977 } else {
1978 fprintf(stderr, "Unable to start HEAD request\n");
1979 }
1980
1981 free(url);
1982 return ret;
1983 }
1984
1985 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
1986 {
1987 char *url;
1988 struct strbuf buffer = STRBUF_INIT;
1989 struct active_request_slot *slot;
1990 struct slot_results results;
1991
1992 url = xmalloc(strlen(repo->url) + strlen(path) + 1);
1993 sprintf(url, "%s%s", repo->url, path);
1994
1995 slot = get_active_slot();
1996 slot->results = &results;
1997 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1998 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1999 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2000 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2001 if (start_active_slot(slot)) {
2002 run_active_slot(slot);
2003 if (results.curl_result != CURLE_OK) {
2004 die("Couldn't get %s for remote symref\n%s",
2005 url, curl_errorstr);
2006 }
2007 } else {
2008 die("Unable to start remote symref request");
2009 }
2010 free(url);
2011
2012 free(*symref);
2013 *symref = NULL;
2014 hashclr(sha1);
2015
2016 if (buffer.len == 0)
2017 return;
2018
2019 /* If it's a symref, set the refname; otherwise try for a sha1 */
2020 if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2021 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2022 } else {
2023 get_sha1_hex(buffer.buf, sha1);
2024 }
2025
2026 strbuf_release(&buffer);
2027 }
2028
2029 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2030 {
2031 struct commit *head = lookup_commit(head_sha1);
2032 struct commit *branch = lookup_commit(branch_sha1);
2033 struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2034
2035 return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2036 }
2037
2038 static int delete_remote_branch(char *pattern, int force)
2039 {
2040 struct ref *refs = remote_refs;
2041 struct ref *remote_ref = NULL;
2042 unsigned char head_sha1[20];
2043 char *symref = NULL;
2044 int match;
2045 int patlen = strlen(pattern);
2046 int i;
2047 struct active_request_slot *slot;
2048 struct slot_results results;
2049 char *url;
2050
2051 /* Find the remote branch(es) matching the specified branch name */
2052 for (match = 0; refs; refs = refs->next) {
2053 char *name = refs->name;
2054 int namelen = strlen(name);
2055 if (namelen < patlen ||
2056 memcmp(name + namelen - patlen, pattern, patlen))
2057 continue;
2058 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2059 continue;
2060 match++;
2061 remote_ref = refs;
2062 }
2063 if (match == 0)
2064 return error("No remote branch matches %s", pattern);
2065 if (match != 1)
2066 return error("More than one remote branch matches %s",
2067 pattern);
2068
2069 /*
2070 * Remote HEAD must be a symref (not exactly foolproof; a remote
2071 * symlink to a symref will look like a symref)
2072 */
2073 fetch_symref("HEAD", &symref, head_sha1);
2074 if (!symref)
2075 return error("Remote HEAD is not a symref");
2076
2077 /* Remote branch must not be the remote HEAD */
2078 for (i=0; symref && i<MAXDEPTH; i++) {
2079 if (!strcmp(remote_ref->name, symref))
2080 return error("Remote branch %s is the current HEAD",
2081 remote_ref->name);
2082 fetch_symref(symref, &symref, head_sha1);
2083 }
2084
2085 /* Run extra sanity checks if delete is not forced */
2086 if (!force) {
2087 /* Remote HEAD must resolve to a known object */
2088 if (symref)
2089 return error("Remote HEAD symrefs too deep");
2090 if (is_zero_sha1(head_sha1))
2091 return error("Unable to resolve remote HEAD");
2092 if (!has_sha1_file(head_sha1))
2093 return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2094
2095 /* Remote branch must resolve to a known object */
2096 if (is_zero_sha1(remote_ref->old_sha1))
2097 return error("Unable to resolve remote branch %s",
2098 remote_ref->name);
2099 if (!has_sha1_file(remote_ref->old_sha1))
2100 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));
2101
2102 /* Remote branch must be an ancestor of remote HEAD */
2103 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2104 return error("The branch '%s' is not an ancestor "
2105 "of your current HEAD.\n"
2106 "If you are sure you want to delete it,"
2107 " run:\n\t'git http-push -D %s %s'",
2108 remote_ref->name, repo->url, pattern);
2109 }
2110 }
2111
2112 /* Send delete request */
2113 fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2114 if (dry_run)
2115 return 0;
2116 url = xmalloc(strlen(repo->url) + strlen(remote_ref->name) + 1);
2117 sprintf(url, "%s%s", repo->url, remote_ref->name);
2118 slot = get_active_slot();
2119 slot->results = &results;
2120 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2121 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2122 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2123 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2124 if (start_active_slot(slot)) {
2125 run_active_slot(slot);
2126 free(url);
2127 if (results.curl_result != CURLE_OK)
2128 return error("DELETE request failed (%d/%ld)\n",
2129 results.curl_result, results.http_code);
2130 } else {
2131 free(url);
2132 return error("Unable to start DELETE request");
2133 }
2134
2135 return 0;
2136 }
2137
2138 int main(int argc, char **argv)
2139 {
2140 struct transfer_request *request;
2141 struct transfer_request *next_request;
2142 int nr_refspec = 0;
2143 char **refspec = NULL;
2144 struct remote_lock *ref_lock = NULL;
2145 struct remote_lock *info_ref_lock = NULL;
2146 struct rev_info revs;
2147 int delete_branch = 0;
2148 int force_delete = 0;
2149 int objects_to_send;
2150 int rc = 0;
2151 int i;
2152 int new_refs;
2153 struct ref *ref, *local_refs;
2154 struct remote *remote;
2155 char *rewritten_url = NULL;
2156
2157 git_extract_argv0_path(argv[0]);
2158
2159 setup_git_directory();
2160
2161 repo = xcalloc(sizeof(*repo), 1);
2162
2163 argv++;
2164 for (i = 1; i < argc; i++, argv++) {
2165 char *arg = *argv;
2166
2167 if (*arg == '-') {
2168 if (!strcmp(arg, "--all")) {
2169 push_all = MATCH_REFS_ALL;
2170 continue;
2171 }
2172 if (!strcmp(arg, "--force")) {
2173 force_all = 1;
2174 continue;
2175 }
2176 if (!strcmp(arg, "--dry-run")) {
2177 dry_run = 1;
2178 continue;
2179 }
2180 if (!strcmp(arg, "--verbose")) {
2181 push_verbosely = 1;
2182 continue;
2183 }
2184 if (!strcmp(arg, "-d")) {
2185 delete_branch = 1;
2186 continue;
2187 }
2188 if (!strcmp(arg, "-D")) {
2189 delete_branch = 1;
2190 force_delete = 1;
2191 continue;
2192 }
2193 }
2194 if (!repo->url) {
2195 char *path = strstr(arg, "//");
2196 repo->url = arg;
2197 repo->path_len = strlen(arg);
2198 if (path) {
2199 repo->path = strchr(path+2, '/');
2200 if (repo->path)
2201 repo->path_len = strlen(repo->path);
2202 }
2203 continue;
2204 }
2205 refspec = argv;
2206 nr_refspec = argc - i;
2207 break;
2208 }
2209
2210 #ifndef USE_CURL_MULTI
2211 die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2212 #endif
2213
2214 if (!repo->url)
2215 usage(http_push_usage);
2216
2217 if (delete_branch && nr_refspec != 1)
2218 die("You must specify only one branch name when deleting a remote branch");
2219
2220 memset(remote_dir_exists, -1, 256);
2221
2222 /*
2223 * Create a minimum remote by hand to give to http_init(),
2224 * primarily to allow it to look at the URL.
2225 */
2226 remote = xcalloc(sizeof(*remote), 1);
2227 ALLOC_GROW(remote->url, remote->url_nr + 1, remote->url_alloc);
2228 remote->url[remote->url_nr++] = repo->url;
2229 http_init(remote);
2230
2231 no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2232
2233 if (repo->url && repo->url[strlen(repo->url)-1] != '/') {
2234 rewritten_url = xmalloc(strlen(repo->url)+2);
2235 strcpy(rewritten_url, repo->url);
2236 strcat(rewritten_url, "/");
2237 repo->path = rewritten_url + (repo->path - repo->url);
2238 repo->path_len++;
2239 repo->url = rewritten_url;
2240 }
2241
2242 /* Verify DAV compliance/lock support */
2243 if (!locking_available()) {
2244 rc = 1;
2245 goto cleanup;
2246 }
2247
2248 sigchain_push_common(remove_locks_on_signal);
2249
2250 /* Check whether the remote has server info files */
2251 repo->can_update_info_refs = 0;
2252 repo->has_info_refs = remote_exists("info/refs");
2253 repo->has_info_packs = remote_exists("objects/info/packs");
2254 if (repo->has_info_refs) {
2255 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2256 if (info_ref_lock)
2257 repo->can_update_info_refs = 1;
2258 else {
2259 error("cannot lock existing info/refs");
2260 rc = 1;
2261 goto cleanup;
2262 }
2263 }
2264 if (repo->has_info_packs)
2265 fetch_indices();
2266
2267 /* Get a list of all local and remote heads to validate refspecs */
2268 local_refs = get_local_heads();
2269 fprintf(stderr, "Fetching remote heads...\n");
2270 get_dav_remote_heads();
2271
2272 /* Remove a remote branch if -d or -D was specified */
2273 if (delete_branch) {
2274 if (delete_remote_branch(refspec[0], force_delete) == -1)
2275 fprintf(stderr, "Unable to delete remote branch %s\n",
2276 refspec[0]);
2277 goto cleanup;
2278 }
2279
2280 /* match them up */
2281 if (!remote_tail)
2282 remote_tail = &remote_refs;
2283 if (match_refs(local_refs, remote_refs, &remote_tail,
2284 nr_refspec, (const char **) refspec, push_all)) {
2285 rc = -1;
2286 goto cleanup;
2287 }
2288 if (!remote_refs) {
2289 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2290 rc = 0;
2291 goto cleanup;
2292 }
2293
2294 new_refs = 0;
2295 for (ref = remote_refs; ref; ref = ref->next) {
2296 char old_hex[60], *new_hex;
2297 const char *commit_argv[4];
2298 int commit_argc;
2299 char *new_sha1_hex, *old_sha1_hex;
2300
2301 if (!ref->peer_ref)
2302 continue;
2303
2304 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2305 if (delete_remote_branch(ref->name, 1) == -1) {
2306 error("Could not remove %s", ref->name);
2307 rc = -4;
2308 }
2309 new_refs++;
2310 continue;
2311 }
2312
2313 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2314 if (push_verbosely || 1)
2315 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2316 continue;
2317 }
2318
2319 if (!force_all &&
2320 !is_zero_sha1(ref->old_sha1) &&
2321 !ref->force) {
2322 if (!has_sha1_file(ref->old_sha1) ||
2323 !ref_newer(ref->peer_ref->new_sha1,
2324 ref->old_sha1)) {
2325 /*
2326 * We do not have the remote ref, or
2327 * we know that the remote ref is not
2328 * an ancestor of what we are trying to
2329 * push. Either way this can be losing
2330 * commits at the remote end and likely
2331 * we were not up to date to begin with.
2332 */
2333 error("remote '%s' is not an ancestor of\n"
2334 "local '%s'.\n"
2335 "Maybe you are not up-to-date and "
2336 "need to pull first?",
2337 ref->name,
2338 ref->peer_ref->name);
2339 rc = -2;
2340 continue;
2341 }
2342 }
2343 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2344 new_refs++;
2345 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2346 new_hex = sha1_to_hex(ref->new_sha1);
2347
2348 fprintf(stderr, "updating '%s'", ref->name);
2349 if (strcmp(ref->name, ref->peer_ref->name))
2350 fprintf(stderr, " using '%s'", ref->peer_ref->name);
2351 fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex);
2352 if (dry_run)
2353 continue;
2354
2355 /* Lock remote branch ref */
2356 ref_lock = lock_remote(ref->name, LOCK_TIME);
2357 if (ref_lock == NULL) {
2358 fprintf(stderr, "Unable to lock remote branch %s\n",
2359 ref->name);
2360 rc = 1;
2361 continue;
2362 }
2363
2364 /* Set up revision info for this refspec */
2365 commit_argc = 3;
2366 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2367 old_sha1_hex = NULL;
2368 commit_argv[1] = "--objects";
2369 commit_argv[2] = new_sha1_hex;
2370 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2371 old_sha1_hex = xmalloc(42);
2372 sprintf(old_sha1_hex, "^%s",
2373 sha1_to_hex(ref->old_sha1));
2374 commit_argv[3] = old_sha1_hex;
2375 commit_argc++;
2376 }
2377 init_revisions(&revs, setup_git_directory());
2378 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2379 revs.edge_hint = 0; /* just in case */
2380 free(new_sha1_hex);
2381 if (old_sha1_hex) {
2382 free(old_sha1_hex);
2383 commit_argv[1] = NULL;
2384 }
2385
2386 /* Generate a list of objects that need to be pushed */
2387 pushing = 0;
2388 if (prepare_revision_walk(&revs))
2389 die("revision walk setup failed");
2390 mark_edges_uninteresting(revs.commits, &revs, NULL);
2391 objects_to_send = get_delta(&revs, ref_lock);
2392 finish_all_active_slots();
2393
2394 /* Push missing objects to remote, this would be a
2395 convenient time to pack them first if appropriate. */
2396 pushing = 1;
2397 if (objects_to_send)
2398 fprintf(stderr, " sending %d objects\n",
2399 objects_to_send);
2400 #ifdef USE_CURL_MULTI
2401 fill_active_slots();
2402 add_fill_function(NULL, fill_active_slot);
2403 #endif
2404 do {
2405 finish_all_active_slots();
2406 #ifdef USE_CURL_MULTI
2407 fill_active_slots();
2408 #endif
2409 } while (request_queue_head && !aborted);
2410
2411 /* Update the remote branch if all went well */
2412 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2413 rc = 1;
2414
2415 if (!rc)
2416 fprintf(stderr, " done\n");
2417 unlock_remote(ref_lock);
2418 check_locks();
2419 }
2420
2421 /* Update remote server info if appropriate */
2422 if (repo->has_info_refs && new_refs) {
2423 if (info_ref_lock && repo->can_update_info_refs) {
2424 fprintf(stderr, "Updating remote server info\n");
2425 if (!dry_run)
2426 update_remote_info_refs(info_ref_lock);
2427 } else {
2428 fprintf(stderr, "Unable to update server info\n");
2429 }
2430 }
2431
2432 cleanup:
2433 free(rewritten_url);
2434 if (info_ref_lock)
2435 unlock_remote(info_ref_lock);
2436 free(repo);
2437
2438 curl_slist_free_all(no_pragma_header);
2439
2440 http_cleanup();
2441
2442 request = request_queue_head;
2443 while (request != NULL) {
2444 next_request = request->next;
2445 release_request(request);
2446 request = next_request;
2447 }
2448
2449 return rc;
2450 }
Dscho's miscellaneous git branches