Code

Merge branch 'rs/diff-ihc'
[git.git] / http-push.c
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"
14 #include <expat.h>
16 static const char http_push_usage[] =
17 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
19 #ifndef XML_STATUS_OK
20 enum XML_Status {
21   XML_STATUS_OK = 1,
22   XML_STATUS_ERROR = 0
23 };
24 #define XML_STATUS_OK    1
25 #define XML_STATUS_ERROR 0
26 #endif
28 #define PREV_BUF_SIZE 4096
29 #define RANGE_HEADER_SIZE 30
31 /* DAV methods */
32 #define DAV_LOCK "LOCK"
33 #define DAV_MKCOL "MKCOL"
34 #define DAV_MOVE "MOVE"
35 #define DAV_PROPFIND "PROPFIND"
36 #define DAV_PUT "PUT"
37 #define DAV_UNLOCK "UNLOCK"
38 #define DAV_DELETE "DELETE"
40 /* DAV lock flags */
41 #define DAV_PROP_LOCKWR (1u << 0)
42 #define DAV_PROP_LOCKEX (1u << 1)
43 #define DAV_LOCK_OK (1u << 2)
45 /* DAV XML properties */
46 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
47 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
48 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
49 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
50 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
51 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
52 #define DAV_PROPFIND_RESP ".multistatus.response"
53 #define DAV_PROPFIND_NAME ".multistatus.response.href"
54 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
56 /* DAV request body templates */
57 #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>"
58 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
59 #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 #define LOCK_TIME 600
62 #define LOCK_REFRESH 30
64 /* bits #0-15 in revision.h */
66 #define LOCAL    (1u<<16)
67 #define REMOTE   (1u<<17)
68 #define FETCHING (1u<<18)
69 #define PUSHING  (1u<<19)
71 /* We allow "recursive" symbolic refs. Only within reason, though */
72 #define MAXDEPTH 5
74 static int pushing;
75 static int aborted;
76 static signed char remote_dir_exists[256];
78 static struct curl_slist *no_pragma_header;
80 static int push_verbosely;
81 static int push_all = MATCH_REFS_NONE;
82 static int force_all;
83 static int dry_run;
85 static struct object_list *objects;
87 struct repo
88 {
89         char *url;
90         char *path;
91         int path_len;
92         int has_info_refs;
93         int can_update_info_refs;
94         int has_info_packs;
95         struct packed_git *packs;
96         struct remote_lock *locks;
97 };
99 static struct repo *remote;
101 enum transfer_state {
102         NEED_FETCH,
103         RUN_FETCH_LOOSE,
104         RUN_FETCH_PACKED,
105         NEED_PUSH,
106         RUN_MKCOL,
107         RUN_PUT,
108         RUN_MOVE,
109         ABORTED,
110         COMPLETE,
111 };
113 struct transfer_request
115         struct object *obj;
116         char *url;
117         char *dest;
118         struct remote_lock *lock;
119         struct curl_slist *headers;
120         struct buffer buffer;
121         char filename[PATH_MAX];
122         char tmpfile[PATH_MAX];
123         int local_fileno;
124         FILE *local_stream;
125         enum transfer_state state;
126         CURLcode curl_result;
127         char errorstr[CURL_ERROR_SIZE];
128         long http_code;
129         unsigned char real_sha1[20];
130         git_SHA_CTX c;
131         z_stream stream;
132         int zret;
133         int rename;
134         void *userData;
135         struct active_request_slot *slot;
136         struct transfer_request *next;
137 };
139 static struct transfer_request *request_queue_head;
141 struct xml_ctx
143         char *name;
144         int len;
145         char *cdata;
146         void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
147         void *userData;
148 };
150 struct remote_lock
152         char *url;
153         char *owner;
154         char *token;
155         time_t start_time;
156         long timeout;
157         int refreshing;
158         struct remote_lock *next;
159 };
161 /* Flags that control remote_ls processing */
162 #define PROCESS_FILES (1u << 0)
163 #define PROCESS_DIRS  (1u << 1)
164 #define RECURSIVE     (1u << 2)
166 /* Flags that remote_ls passes to callback functions */
167 #define IS_DIR (1u << 0)
169 struct remote_ls_ctx
171         char *path;
172         void (*userFunc)(struct remote_ls_ctx *ls);
173         void *userData;
174         int flags;
175         char *dentry_name;
176         int dentry_flags;
177         struct remote_ls_ctx *parent;
178 };
180 static void finish_request(struct transfer_request *request);
181 static void release_request(struct transfer_request *request);
183 static void process_response(void *callback_data)
185         struct transfer_request *request =
186                 (struct transfer_request *)callback_data;
188         finish_request(request);
191 #ifdef USE_CURL_MULTI
192 static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb,
193                                void *data)
195         unsigned char expn[4096];
196         size_t size = eltsize * nmemb;
197         int posn = 0;
198         struct transfer_request *request = (struct transfer_request *)data;
199         do {
200                 ssize_t retval = xwrite(request->local_fileno,
201                                        (char *) ptr + posn, size - posn);
202                 if (retval < 0)
203                         return posn;
204                 posn += retval;
205         } while (posn < size);
207         request->stream.avail_in = size;
208         request->stream.next_in = ptr;
209         do {
210                 request->stream.next_out = expn;
211                 request->stream.avail_out = sizeof(expn);
212                 request->zret = inflate(&request->stream, Z_SYNC_FLUSH);
213                 git_SHA1_Update(&request->c, expn,
214                             sizeof(expn) - request->stream.avail_out);
215         } while (request->stream.avail_in && request->zret == Z_OK);
216         data_received++;
217         return size;
220 static void start_fetch_loose(struct transfer_request *request)
222         char *hex = sha1_to_hex(request->obj->sha1);
223         char *filename;
224         char prevfile[PATH_MAX];
225         char *url;
226         char *posn;
227         int prevlocal;
228         unsigned char prev_buf[PREV_BUF_SIZE];
229         ssize_t prev_read = 0;
230         long prev_posn = 0;
231         char range[RANGE_HEADER_SIZE];
232         struct curl_slist *range_header = NULL;
233         struct active_request_slot *slot;
235         filename = sha1_file_name(request->obj->sha1);
236         snprintf(request->filename, sizeof(request->filename), "%s", filename);
237         snprintf(request->tmpfile, sizeof(request->tmpfile),
238                  "%s.temp", filename);
240         snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename);
241         unlink(prevfile);
242         rename(request->tmpfile, prevfile);
243         unlink(request->tmpfile);
245         if (request->local_fileno != -1)
246                 error("fd leakage in start: %d", request->local_fileno);
247         request->local_fileno = open(request->tmpfile,
248                                      O_WRONLY | O_CREAT | O_EXCL, 0666);
249         /* This could have failed due to the "lazy directory creation";
250          * try to mkdir the last path component.
251          */
252         if (request->local_fileno < 0 && errno == ENOENT) {
253                 char *dir = strrchr(request->tmpfile, '/');
254                 if (dir) {
255                         *dir = 0;
256                         mkdir(request->tmpfile, 0777);
257                         *dir = '/';
258                 }
259                 request->local_fileno = open(request->tmpfile,
260                                              O_WRONLY | O_CREAT | O_EXCL, 0666);
261         }
263         if (request->local_fileno < 0) {
264                 request->state = ABORTED;
265                 error("Couldn't create temporary file %s for %s: %s",
266                       request->tmpfile, request->filename, strerror(errno));
267                 return;
268         }
270         memset(&request->stream, 0, sizeof(request->stream));
272         inflateInit(&request->stream);
274         git_SHA1_Init(&request->c);
276         url = xmalloc(strlen(remote->url) + 50);
277         request->url = xmalloc(strlen(remote->url) + 50);
278         strcpy(url, remote->url);
279         posn = url + strlen(remote->url);
280         strcpy(posn, "objects/");
281         posn += 8;
282         memcpy(posn, hex, 2);
283         posn += 2;
284         *(posn++) = '/';
285         strcpy(posn, hex + 2);
286         strcpy(request->url, url);
288         /* If a previous temp file is present, process what was already
289            fetched. */
290         prevlocal = open(prevfile, O_RDONLY);
291         if (prevlocal != -1) {
292                 do {
293                         prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE);
294                         if (prev_read>0) {
295                                 if (fwrite_sha1_file(prev_buf,
296                                                      1,
297                                                      prev_read,
298                                                      request) == prev_read) {
299                                         prev_posn += prev_read;
300                                 } else {
301                                         prev_read = -1;
302                                 }
303                         }
304                 } while (prev_read > 0);
305                 close(prevlocal);
306         }
307         unlink(prevfile);
309         /* Reset inflate/SHA1 if there was an error reading the previous temp
310            file; also rewind to the beginning of the local file. */
311         if (prev_read == -1) {
312                 memset(&request->stream, 0, sizeof(request->stream));
313                 inflateInit(&request->stream);
314                 git_SHA1_Init(&request->c);
315                 if (prev_posn>0) {
316                         prev_posn = 0;
317                         lseek(request->local_fileno, 0, SEEK_SET);
318                         ftruncate(request->local_fileno, 0);
319                 }
320         }
322         slot = get_active_slot();
323         slot->callback_func = process_response;
324         slot->callback_data = request;
325         request->slot = slot;
327         curl_easy_setopt(slot->curl, CURLOPT_FILE, request);
328         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file);
329         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
330         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
331         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
333         /* If we have successfully processed data from a previous fetch
334            attempt, only fetch the data we don't already have. */
335         if (prev_posn>0) {
336                 if (push_verbosely)
337                         fprintf(stderr,
338                                 "Resuming fetch of object %s at byte %ld\n",
339                                 hex, prev_posn);
340                 sprintf(range, "Range: bytes=%ld-", prev_posn);
341                 range_header = curl_slist_append(range_header, range);
342                 curl_easy_setopt(slot->curl,
343                                  CURLOPT_HTTPHEADER, range_header);
344         }
346         /* Try to get the request started, abort the request on error */
347         request->state = RUN_FETCH_LOOSE;
348         if (!start_active_slot(slot)) {
349                 fprintf(stderr, "Unable to start GET request\n");
350                 remote->can_update_info_refs = 0;
351                 release_request(request);
352         }
355 static void start_mkcol(struct transfer_request *request)
357         char *hex = sha1_to_hex(request->obj->sha1);
358         struct active_request_slot *slot;
359         char *posn;
361         request->url = xmalloc(strlen(remote->url) + 13);
362         strcpy(request->url, remote->url);
363         posn = request->url + strlen(remote->url);
364         strcpy(posn, "objects/");
365         posn += 8;
366         memcpy(posn, hex, 2);
367         posn += 2;
368         strcpy(posn, "/");
370         slot = get_active_slot();
371         slot->callback_func = process_response;
372         slot->callback_data = request;
373         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
374         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
375         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
376         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
377         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
379         if (start_active_slot(slot)) {
380                 request->slot = slot;
381                 request->state = RUN_MKCOL;
382         } else {
383                 request->state = ABORTED;
384                 free(request->url);
385                 request->url = NULL;
386         }
388 #endif
390 static void start_fetch_packed(struct transfer_request *request)
392         char *url;
393         struct packed_git *target;
394         FILE *packfile;
395         char *filename;
396         long prev_posn = 0;
397         char range[RANGE_HEADER_SIZE];
398         struct curl_slist *range_header = NULL;
400         struct transfer_request *check_request = request_queue_head;
401         struct active_request_slot *slot;
403         target = find_sha1_pack(request->obj->sha1, remote->packs);
404         if (!target) {
405                 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1));
406                 remote->can_update_info_refs = 0;
407                 release_request(request);
408                 return;
409         }
411         fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1));
412         fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1));
414         filename = sha1_pack_name(target->sha1);
415         snprintf(request->filename, sizeof(request->filename), "%s", filename);
416         snprintf(request->tmpfile, sizeof(request->tmpfile),
417                  "%s.temp", filename);
419         url = xmalloc(strlen(remote->url) + 64);
420         sprintf(url, "%sobjects/pack/pack-%s.pack",
421                 remote->url, sha1_to_hex(target->sha1));
423         /* Make sure there isn't another open request for this pack */
424         while (check_request) {
425                 if (check_request->state == RUN_FETCH_PACKED &&
426                     !strcmp(check_request->url, url)) {
427                         free(url);
428                         release_request(request);
429                         return;
430                 }
431                 check_request = check_request->next;
432         }
434         packfile = fopen(request->tmpfile, "a");
435         if (!packfile) {
436                 fprintf(stderr, "Unable to open local file %s for pack",
437                         request->tmpfile);
438                 remote->can_update_info_refs = 0;
439                 free(url);
440                 return;
441         }
443         slot = get_active_slot();
444         slot->callback_func = process_response;
445         slot->callback_data = request;
446         request->slot = slot;
447         request->local_stream = packfile;
448         request->userData = target;
450         request->url = url;
451         curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile);
452         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
453         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
454         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
455         slot->local = packfile;
457         /* If there is data present from a previous transfer attempt,
458            resume where it left off */
459         prev_posn = ftell(packfile);
460         if (prev_posn>0) {
461                 if (push_verbosely)
462                         fprintf(stderr,
463                                 "Resuming fetch of pack %s at byte %ld\n",
464                                 sha1_to_hex(target->sha1), prev_posn);
465                 sprintf(range, "Range: bytes=%ld-", prev_posn);
466                 range_header = curl_slist_append(range_header, range);
467                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
468         }
470         /* Try to get the request started, abort the request on error */
471         request->state = RUN_FETCH_PACKED;
472         if (!start_active_slot(slot)) {
473                 fprintf(stderr, "Unable to start GET request\n");
474                 remote->can_update_info_refs = 0;
475                 release_request(request);
476         }
479 static void start_put(struct transfer_request *request)
481         char *hex = sha1_to_hex(request->obj->sha1);
482         struct active_request_slot *slot;
483         char *posn;
484         enum object_type type;
485         char hdr[50];
486         void *unpacked;
487         unsigned long len;
488         int hdrlen;
489         ssize_t size;
490         z_stream stream;
492         unpacked = read_sha1_file(request->obj->sha1, &type, &len);
493         hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1;
495         /* Set it up */
496         memset(&stream, 0, sizeof(stream));
497         deflateInit(&stream, zlib_compression_level);
498         size = deflateBound(&stream, len + hdrlen);
499         strbuf_init(&request->buffer.buf, size);
500         request->buffer.posn = 0;
502         /* Compress it */
503         stream.next_out = (unsigned char *)request->buffer.buf.buf;
504         stream.avail_out = size;
506         /* First header.. */
507         stream.next_in = (void *)hdr;
508         stream.avail_in = hdrlen;
509         while (deflate(&stream, 0) == Z_OK)
510                 /* nothing */;
512         /* Then the data itself.. */
513         stream.next_in = unpacked;
514         stream.avail_in = len;
515         while (deflate(&stream, Z_FINISH) == Z_OK)
516                 /* nothing */;
517         deflateEnd(&stream);
518         free(unpacked);
520         request->buffer.buf.len = stream.total_out;
522         request->url = xmalloc(strlen(remote->url) +
523                                strlen(request->lock->token) + 51);
524         strcpy(request->url, remote->url);
525         posn = request->url + strlen(remote->url);
526         strcpy(posn, "objects/");
527         posn += 8;
528         memcpy(posn, hex, 2);
529         posn += 2;
530         *(posn++) = '/';
531         strcpy(posn, hex + 2);
532         request->dest = xmalloc(strlen(request->url) + 14);
533         sprintf(request->dest, "Destination: %s", request->url);
534         posn += 38;
535         *(posn++) = '_';
536         strcpy(posn, request->lock->token);
538         slot = get_active_slot();
539         slot->callback_func = process_response;
540         slot->callback_data = request;
541         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer);
542         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len);
543         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
544         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
545         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
546         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
547         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
548         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
549         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
551         if (start_active_slot(slot)) {
552                 request->slot = slot;
553                 request->state = RUN_PUT;
554         } else {
555                 request->state = ABORTED;
556                 free(request->url);
557                 request->url = NULL;
558         }
561 static void start_move(struct transfer_request *request)
563         struct active_request_slot *slot;
564         struct curl_slist *dav_headers = NULL;
566         slot = get_active_slot();
567         slot->callback_func = process_response;
568         slot->callback_data = request;
569         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */
570         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE);
571         dav_headers = curl_slist_append(dav_headers, request->dest);
572         dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
573         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
574         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
575         curl_easy_setopt(slot->curl, CURLOPT_URL, request->url);
577         if (start_active_slot(slot)) {
578                 request->slot = slot;
579                 request->state = RUN_MOVE;
580         } else {
581                 request->state = ABORTED;
582                 free(request->url);
583                 request->url = NULL;
584         }
587 static int refresh_lock(struct remote_lock *lock)
589         struct active_request_slot *slot;
590         struct slot_results results;
591         char *if_header;
592         char timeout_header[25];
593         struct curl_slist *dav_headers = NULL;
594         int rc = 0;
596         lock->refreshing = 1;
598         if_header = xmalloc(strlen(lock->token) + 25);
599         sprintf(if_header, "If: (<%s>)", lock->token);
600         sprintf(timeout_header, "Timeout: Second-%ld", lock->timeout);
601         dav_headers = curl_slist_append(dav_headers, if_header);
602         dav_headers = curl_slist_append(dav_headers, timeout_header);
604         slot = get_active_slot();
605         slot->results = &results;
606         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
607         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
608         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
609         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
610         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
612         if (start_active_slot(slot)) {
613                 run_active_slot(slot);
614                 if (results.curl_result != CURLE_OK) {
615                         fprintf(stderr, "LOCK HTTP error %ld\n",
616                                 results.http_code);
617                 } else {
618                         lock->start_time = time(NULL);
619                         rc = 1;
620                 }
621         }
623         lock->refreshing = 0;
624         curl_slist_free_all(dav_headers);
625         free(if_header);
627         return rc;
630 static void check_locks(void)
632         struct remote_lock *lock = remote->locks;
633         time_t current_time = time(NULL);
634         int time_remaining;
636         while (lock) {
637                 time_remaining = lock->start_time + lock->timeout -
638                         current_time;
639                 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
640                         if (!refresh_lock(lock)) {
641                                 fprintf(stderr,
642                                         "Unable to refresh lock for %s\n",
643                                         lock->url);
644                                 aborted = 1;
645                                 return;
646                         }
647                 }
648                 lock = lock->next;
649         }
652 static void release_request(struct transfer_request *request)
654         struct transfer_request *entry = request_queue_head;
656         if (request == request_queue_head) {
657                 request_queue_head = request->next;
658         } else {
659                 while (entry->next != NULL && entry->next != request)
660                         entry = entry->next;
661                 if (entry->next == request)
662                         entry->next = entry->next->next;
663         }
665         if (request->local_fileno != -1)
666                 close(request->local_fileno);
667         if (request->local_stream)
668                 fclose(request->local_stream);
669         free(request->url);
670         free(request);
673 static void finish_request(struct transfer_request *request)
675         struct stat st;
676         struct packed_git *target;
677         struct packed_git **lst;
679         request->curl_result = request->slot->curl_result;
680         request->http_code = request->slot->http_code;
681         request->slot = NULL;
683         /* Keep locks active */
684         check_locks();
686         if (request->headers != NULL)
687                 curl_slist_free_all(request->headers);
689         /* URL is reused for MOVE after PUT */
690         if (request->state != RUN_PUT) {
691                 free(request->url);
692                 request->url = NULL;
693         }
695         if (request->state == RUN_MKCOL) {
696                 if (request->curl_result == CURLE_OK ||
697                     request->http_code == 405) {
698                         remote_dir_exists[request->obj->sha1[0]] = 1;
699                         start_put(request);
700                 } else {
701                         fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
702                                 sha1_to_hex(request->obj->sha1),
703                                 request->curl_result, request->http_code);
704                         request->state = ABORTED;
705                         aborted = 1;
706                 }
707         } else if (request->state == RUN_PUT) {
708                 if (request->curl_result == CURLE_OK) {
709                         start_move(request);
710                 } else {
711                         fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
712                                 sha1_to_hex(request->obj->sha1),
713                                 request->curl_result, request->http_code);
714                         request->state = ABORTED;
715                         aborted = 1;
716                 }
717         } else if (request->state == RUN_MOVE) {
718                 if (request->curl_result == CURLE_OK) {
719                         if (push_verbosely)
720                                 fprintf(stderr, "    sent %s\n",
721                                         sha1_to_hex(request->obj->sha1));
722                         request->obj->flags |= REMOTE;
723                         release_request(request);
724                 } else {
725                         fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
726                                 sha1_to_hex(request->obj->sha1),
727                                 request->curl_result, request->http_code);
728                         request->state = ABORTED;
729                         aborted = 1;
730                 }
731         } else if (request->state == RUN_FETCH_LOOSE) {
732                 fchmod(request->local_fileno, 0444);
733                 close(request->local_fileno); request->local_fileno = -1;
735                 if (request->curl_result != CURLE_OK &&
736                     request->http_code != 416) {
737                         if (stat(request->tmpfile, &st) == 0) {
738                                 if (st.st_size == 0)
739                                         unlink(request->tmpfile);
740                         }
741                 } else {
742                         if (request->http_code == 416)
743                                 fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n");
745                         inflateEnd(&request->stream);
746                         git_SHA1_Final(request->real_sha1, &request->c);
747                         if (request->zret != Z_STREAM_END) {
748                                 unlink(request->tmpfile);
749                         } else if (hashcmp(request->obj->sha1, request->real_sha1)) {
750                                 unlink(request->tmpfile);
751                         } else {
752                                 request->rename =
753                                         move_temp_to_file(
754                                                 request->tmpfile,
755                                                 request->filename);
756                                 if (request->rename == 0) {
757                                         request->obj->flags |= (LOCAL | REMOTE);
758                                 }
759                         }
760                 }
762                 /* Try fetching packed if necessary */
763                 if (request->obj->flags & LOCAL)
764                         release_request(request);
765                 else
766                         start_fetch_packed(request);
768         } else if (request->state == RUN_FETCH_PACKED) {
769                 if (request->curl_result != CURLE_OK) {
770                         fprintf(stderr, "Unable to get pack file %s\n%s",
771                                 request->url, curl_errorstr);
772                         remote->can_update_info_refs = 0;
773                 } else {
774                         off_t pack_size = ftell(request->local_stream);
776                         fclose(request->local_stream);
777                         request->local_stream = NULL;
778                         if (!move_temp_to_file(request->tmpfile,
779                                                request->filename)) {
780                                 target = (struct packed_git *)request->userData;
781                                 target->pack_size = pack_size;
782                                 lst = &remote->packs;
783                                 while (*lst != target)
784                                         lst = &((*lst)->next);
785                                 *lst = (*lst)->next;
787                                 if (!verify_pack(target))
788                                         install_packed_git(target);
789                                 else
790                                         remote->can_update_info_refs = 0;
791                         }
792                 }
793                 release_request(request);
794         }
797 #ifdef USE_CURL_MULTI
798 static int fill_active_slot(void *unused)
800         struct transfer_request *request = request_queue_head;
802         if (aborted)
803                 return 0;
805         for (request = request_queue_head; request; request = request->next) {
806                 if (request->state == NEED_FETCH) {
807                         start_fetch_loose(request);
808                         return 1;
809                 } else if (pushing && request->state == NEED_PUSH) {
810                         if (remote_dir_exists[request->obj->sha1[0]] == 1) {
811                                 start_put(request);
812                         } else {
813                                 start_mkcol(request);
814                         }
815                         return 1;
816                 }
817         }
818         return 0;
820 #endif
822 static void get_remote_object_list(unsigned char parent);
824 static void add_fetch_request(struct object *obj)
826         struct transfer_request *request;
828         check_locks();
830         /*
831          * Don't fetch the object if it's known to exist locally
832          * or is already in the request queue
833          */
834         if (remote_dir_exists[obj->sha1[0]] == -1)
835                 get_remote_object_list(obj->sha1[0]);
836         if (obj->flags & (LOCAL | FETCHING))
837                 return;
839         obj->flags |= FETCHING;
840         request = xmalloc(sizeof(*request));
841         request->obj = obj;
842         request->url = NULL;
843         request->lock = NULL;
844         request->headers = NULL;
845         request->local_fileno = -1;
846         request->local_stream = NULL;
847         request->state = NEED_FETCH;
848         request->next = request_queue_head;
849         request_queue_head = request;
851 #ifdef USE_CURL_MULTI
852         fill_active_slots();
853         step_active_slots();
854 #endif
857 static int add_send_request(struct object *obj, struct remote_lock *lock)
859         struct transfer_request *request = request_queue_head;
860         struct packed_git *target;
862         /* Keep locks active */
863         check_locks();
865         /*
866          * Don't push the object if it's known to exist on the remote
867          * or is already in the request queue
868          */
869         if (remote_dir_exists[obj->sha1[0]] == -1)
870                 get_remote_object_list(obj->sha1[0]);
871         if (obj->flags & (REMOTE | PUSHING))
872                 return 0;
873         target = find_sha1_pack(obj->sha1, remote->packs);
874         if (target) {
875                 obj->flags |= REMOTE;
876                 return 0;
877         }
879         obj->flags |= PUSHING;
880         request = xmalloc(sizeof(*request));
881         request->obj = obj;
882         request->url = NULL;
883         request->lock = lock;
884         request->headers = NULL;
885         request->local_fileno = -1;
886         request->local_stream = NULL;
887         request->state = NEED_PUSH;
888         request->next = request_queue_head;
889         request_queue_head = request;
891 #ifdef USE_CURL_MULTI
892         fill_active_slots();
893         step_active_slots();
894 #endif
896         return 1;
899 static int fetch_index(unsigned char *sha1)
901         char *hex = sha1_to_hex(sha1);
902         char *filename;
903         char *url;
904         char tmpfile[PATH_MAX];
905         long prev_posn = 0;
906         char range[RANGE_HEADER_SIZE];
907         struct curl_slist *range_header = NULL;
909         FILE *indexfile;
910         struct active_request_slot *slot;
911         struct slot_results results;
913         /* Don't use the index if the pack isn't there */
914         url = xmalloc(strlen(remote->url) + 64);
915         sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex);
916         slot = get_active_slot();
917         slot->results = &results;
918         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
919         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
920         if (start_active_slot(slot)) {
921                 run_active_slot(slot);
922                 if (results.curl_result != CURLE_OK) {
923                         free(url);
924                         return error("Unable to verify pack %s is available",
925                                      hex);
926                 }
927         } else {
928                 free(url);
929                 return error("Unable to start request");
930         }
932         if (has_pack_index(sha1)) {
933                 free(url);
934                 return 0;
935         }
937         if (push_verbosely)
938                 fprintf(stderr, "Getting index for pack %s\n", hex);
940         sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex);
942         filename = sha1_pack_index_name(sha1);
943         snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename);
944         indexfile = fopen(tmpfile, "a");
945         if (!indexfile) {
946                 free(url);
947                 return error("Unable to open local file %s for pack index",
948                              tmpfile);
949         }
951         slot = get_active_slot();
952         slot->results = &results;
953         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
954         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
955         curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile);
956         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite);
957         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
958         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header);
959         slot->local = indexfile;
961         /* If there is data present from a previous transfer attempt,
962            resume where it left off */
963         prev_posn = ftell(indexfile);
964         if (prev_posn>0) {
965                 if (push_verbosely)
966                         fprintf(stderr,
967                                 "Resuming fetch of index for pack %s at byte %ld\n",
968                                 hex, prev_posn);
969                 sprintf(range, "Range: bytes=%ld-", prev_posn);
970                 range_header = curl_slist_append(range_header, range);
971                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header);
972         }
974         if (start_active_slot(slot)) {
975                 run_active_slot(slot);
976                 if (results.curl_result != CURLE_OK) {
977                         free(url);
978                         fclose(indexfile);
979                         return error("Unable to get pack index %s\n%s", url,
980                                      curl_errorstr);
981                 }
982         } else {
983                 free(url);
984                 fclose(indexfile);
985                 return error("Unable to start request");
986         }
988         free(url);
989         fclose(indexfile);
991         return move_temp_to_file(tmpfile, filename);
994 static int setup_index(unsigned char *sha1)
996         struct packed_git *new_pack;
998         if (fetch_index(sha1))
999                 return -1;
1001         new_pack = parse_pack_index(sha1);
1002         new_pack->next = remote->packs;
1003         remote->packs = new_pack;
1004         return 0;
1007 static int fetch_indices(void)
1009         unsigned char sha1[20];
1010         char *url;
1011         struct strbuf buffer = STRBUF_INIT;
1012         char *data;
1013         int i = 0;
1015         struct active_request_slot *slot;
1016         struct slot_results results;
1018         if (push_verbosely)
1019                 fprintf(stderr, "Getting pack list\n");
1021         url = xmalloc(strlen(remote->url) + 20);
1022         sprintf(url, "%sobjects/info/packs", remote->url);
1024         slot = get_active_slot();
1025         slot->results = &results;
1026         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
1027         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1028         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1029         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
1030         if (start_active_slot(slot)) {
1031                 run_active_slot(slot);
1032                 if (results.curl_result != CURLE_OK) {
1033                         strbuf_release(&buffer);
1034                         free(url);
1035                         if (results.http_code == 404)
1036                                 return 0;
1037                         else
1038                                 return error("%s", curl_errorstr);
1039                 }
1040         } else {
1041                 strbuf_release(&buffer);
1042                 free(url);
1043                 return error("Unable to start request");
1044         }
1045         free(url);
1047         data = buffer.buf;
1048         while (i < buffer.len) {
1049                 switch (data[i]) {
1050                 case 'P':
1051                         i++;
1052                         if (i + 52 < buffer.len &&
1053                             !prefixcmp(data + i, " pack-") &&
1054                             !prefixcmp(data + i + 46, ".pack\n")) {
1055                                 get_sha1_hex(data + i + 6, sha1);
1056                                 setup_index(sha1);
1057                                 i += 51;
1058                                 break;
1059                         }
1060                 default:
1061                         while (data[i] != '\n')
1062                                 i++;
1063                 }
1064                 i++;
1065         }
1067         strbuf_release(&buffer);
1068         return 0;
1071 static void one_remote_object(const char *hex)
1073         unsigned char sha1[20];
1074         struct object *obj;
1076         if (get_sha1_hex(hex, sha1) != 0)
1077                 return;
1079         obj = lookup_object(sha1);
1080         if (!obj)
1081                 obj = parse_object(sha1);
1083         /* Ignore remote objects that don't exist locally */
1084         if (!obj)
1085                 return;
1087         obj->flags |= REMOTE;
1088         if (!object_list_contains(objects, obj))
1089                 object_list_insert(obj, &objects);
1092 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
1094         int *lock_flags = (int *)ctx->userData;
1096         if (tag_closed) {
1097                 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
1098                         if ((*lock_flags & DAV_PROP_LOCKEX) &&
1099                             (*lock_flags & DAV_PROP_LOCKWR)) {
1100                                 *lock_flags |= DAV_LOCK_OK;
1101                         }
1102                         *lock_flags &= DAV_LOCK_OK;
1103                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
1104                         *lock_flags |= DAV_PROP_LOCKWR;
1105                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
1106                         *lock_flags |= DAV_PROP_LOCKEX;
1107                 }
1108         }
1111 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
1113         struct remote_lock *lock = (struct remote_lock *)ctx->userData;
1115         if (tag_closed && ctx->cdata) {
1116                 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
1117                         lock->owner = xmalloc(strlen(ctx->cdata) + 1);
1118                         strcpy(lock->owner, ctx->cdata);
1119                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
1120                         if (!prefixcmp(ctx->cdata, "Second-"))
1121                                 lock->timeout =
1122                                         strtol(ctx->cdata + 7, NULL, 10);
1123                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
1124                         lock->token = xmalloc(strlen(ctx->cdata) + 1);
1125                         strcpy(lock->token, ctx->cdata);
1126                 }
1127         }
1130 static void one_remote_ref(char *refname);
1132 static void
1133 xml_start_tag(void *userData, const char *name, const char **atts)
1135         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1136         const char *c = strchr(name, ':');
1137         int new_len;
1139         if (c == NULL)
1140                 c = name;
1141         else
1142                 c++;
1144         new_len = strlen(ctx->name) + strlen(c) + 2;
1146         if (new_len > ctx->len) {
1147                 ctx->name = xrealloc(ctx->name, new_len);
1148                 ctx->len = new_len;
1149         }
1150         strcat(ctx->name, ".");
1151         strcat(ctx->name, c);
1153         free(ctx->cdata);
1154         ctx->cdata = NULL;
1156         ctx->userFunc(ctx, 0);
1159 static void
1160 xml_end_tag(void *userData, const char *name)
1162         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1163         const char *c = strchr(name, ':');
1164         char *ep;
1166         ctx->userFunc(ctx, 1);
1168         if (c == NULL)
1169                 c = name;
1170         else
1171                 c++;
1173         ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
1174         *ep = 0;
1177 static void
1178 xml_cdata(void *userData, const XML_Char *s, int len)
1180         struct xml_ctx *ctx = (struct xml_ctx *)userData;
1181         free(ctx->cdata);
1182         ctx->cdata = xmemdupz(s, len);
1185 static struct remote_lock *lock_remote(const char *path, long timeout)
1187         struct active_request_slot *slot;
1188         struct slot_results results;
1189         struct buffer out_buffer = { STRBUF_INIT, 0 };
1190         struct strbuf in_buffer = STRBUF_INIT;
1191         char *url;
1192         char *ep;
1193         char timeout_header[25];
1194         struct remote_lock *lock = NULL;
1195         struct curl_slist *dav_headers = NULL;
1196         struct xml_ctx ctx;
1198         url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1199         sprintf(url, "%s%s", remote->url, path);
1201         /* Make sure leading directories exist for the remote ref */
1202         ep = strchr(url + strlen(remote->url) + 1, '/');
1203         while (ep) {
1204                 *ep = 0;
1205                 slot = get_active_slot();
1206                 slot->results = &results;
1207                 curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
1208                 curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1209                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL);
1210                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1211                 if (start_active_slot(slot)) {
1212                         run_active_slot(slot);
1213                         if (results.curl_result != CURLE_OK &&
1214                             results.http_code != 405) {
1215                                 fprintf(stderr,
1216                                         "Unable to create branch path %s\n",
1217                                         url);
1218                                 free(url);
1219                                 return NULL;
1220                         }
1221                 } else {
1222                         fprintf(stderr, "Unable to start MKCOL request\n");
1223                         free(url);
1224                         return NULL;
1225                 }
1226                 *ep = '/';
1227                 ep = strchr(ep + 1, '/');
1228         }
1230         strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email);
1232         sprintf(timeout_header, "Timeout: Second-%ld", timeout);
1233         dav_headers = curl_slist_append(dav_headers, timeout_header);
1234         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1236         slot = get_active_slot();
1237         slot->results = &results;
1238         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1239         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1240         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1241         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1242         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1243         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1244         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1245         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK);
1246         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1248         lock = xcalloc(1, sizeof(*lock));
1249         lock->timeout = -1;
1251         if (start_active_slot(slot)) {
1252                 run_active_slot(slot);
1253                 if (results.curl_result == CURLE_OK) {
1254                         XML_Parser parser = XML_ParserCreate(NULL);
1255                         enum XML_Status result;
1256                         ctx.name = xcalloc(10, 1);
1257                         ctx.len = 0;
1258                         ctx.cdata = NULL;
1259                         ctx.userFunc = handle_new_lock_ctx;
1260                         ctx.userData = lock;
1261                         XML_SetUserData(parser, &ctx);
1262                         XML_SetElementHandler(parser, xml_start_tag,
1263                                               xml_end_tag);
1264                         XML_SetCharacterDataHandler(parser, xml_cdata);
1265                         result = XML_Parse(parser, in_buffer.buf,
1266                                            in_buffer.len, 1);
1267                         free(ctx.name);
1268                         if (result != XML_STATUS_OK) {
1269                                 fprintf(stderr, "XML error: %s\n",
1270                                         XML_ErrorString(
1271                                                 XML_GetErrorCode(parser)));
1272                                 lock->timeout = -1;
1273                         }
1274                         XML_ParserFree(parser);
1275                 }
1276         } else {
1277                 fprintf(stderr, "Unable to start LOCK request\n");
1278         }
1280         curl_slist_free_all(dav_headers);
1281         strbuf_release(&out_buffer.buf);
1282         strbuf_release(&in_buffer);
1284         if (lock->token == NULL || lock->timeout <= 0) {
1285                 free(lock->token);
1286                 free(lock->owner);
1287                 free(url);
1288                 free(lock);
1289                 lock = NULL;
1290         } else {
1291                 lock->url = url;
1292                 lock->start_time = time(NULL);
1293                 lock->next = remote->locks;
1294                 remote->locks = lock;
1295         }
1297         return lock;
1300 static int unlock_remote(struct remote_lock *lock)
1302         struct active_request_slot *slot;
1303         struct slot_results results;
1304         struct remote_lock *prev = remote->locks;
1305         char *lock_token_header;
1306         struct curl_slist *dav_headers = NULL;
1307         int rc = 0;
1309         lock_token_header = xmalloc(strlen(lock->token) + 31);
1310         sprintf(lock_token_header, "Lock-Token: <%s>",
1311                 lock->token);
1312         dav_headers = curl_slist_append(dav_headers, lock_token_header);
1314         slot = get_active_slot();
1315         slot->results = &results;
1316         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1317         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1318         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK);
1319         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1321         if (start_active_slot(slot)) {
1322                 run_active_slot(slot);
1323                 if (results.curl_result == CURLE_OK)
1324                         rc = 1;
1325                 else
1326                         fprintf(stderr, "UNLOCK HTTP error %ld\n",
1327                                 results.http_code);
1328         } else {
1329                 fprintf(stderr, "Unable to start UNLOCK request\n");
1330         }
1332         curl_slist_free_all(dav_headers);
1333         free(lock_token_header);
1335         if (remote->locks == lock) {
1336                 remote->locks = lock->next;
1337         } else {
1338                 while (prev && prev->next != lock)
1339                         prev = prev->next;
1340                 if (prev)
1341                         prev->next = prev->next->next;
1342         }
1344         free(lock->owner);
1345         free(lock->url);
1346         free(lock->token);
1347         free(lock);
1349         return rc;
1352 static void remove_locks(void)
1354         struct remote_lock *lock = remote->locks;
1356         fprintf(stderr, "Removing remote locks...\n");
1357         while (lock) {
1358                 unlock_remote(lock);
1359                 lock = lock->next;
1360         }
1363 static void remove_locks_on_signal(int signo)
1365         remove_locks();
1366         signal(signo, SIG_DFL);
1367         raise(signo);
1370 static void remote_ls(const char *path, int flags,
1371                       void (*userFunc)(struct remote_ls_ctx *ls),
1372                       void *userData);
1374 static void process_ls_object(struct remote_ls_ctx *ls)
1376         unsigned int *parent = (unsigned int *)ls->userData;
1377         char *path = ls->dentry_name;
1378         char *obj_hex;
1380         if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1381                 remote_dir_exists[*parent] = 1;
1382                 return;
1383         }
1385         if (strlen(path) != 49)
1386                 return;
1387         path += 8;
1388         obj_hex = xmalloc(strlen(path));
1389         /* NB: path is not null-terminated, can not use strlcpy here */
1390         memcpy(obj_hex, path, 2);
1391         strcpy(obj_hex + 2, path + 3);
1392         one_remote_object(obj_hex);
1393         free(obj_hex);
1396 static void process_ls_ref(struct remote_ls_ctx *ls)
1398         if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1399                 fprintf(stderr, "  %s\n", ls->dentry_name);
1400                 return;
1401         }
1403         if (!(ls->dentry_flags & IS_DIR))
1404                 one_remote_ref(ls->dentry_name);
1407 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1409         struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1411         if (tag_closed) {
1412                 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1413                         if (ls->dentry_flags & IS_DIR) {
1414                                 if (ls->flags & PROCESS_DIRS) {
1415                                         ls->userFunc(ls);
1416                                 }
1417                                 if (strcmp(ls->dentry_name, ls->path) &&
1418                                     ls->flags & RECURSIVE) {
1419                                         remote_ls(ls->dentry_name,
1420                                                   ls->flags,
1421                                                   ls->userFunc,
1422                                                   ls->userData);
1423                                 }
1424                         } else if (ls->flags & PROCESS_FILES) {
1425                                 ls->userFunc(ls);
1426                         }
1427                 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1428                         char *path = ctx->cdata;
1429                         if (*ctx->cdata == 'h') {
1430                                 path = strstr(path, "//");
1431                                 if (path) {
1432                                         path = strchr(path+2, '/');
1433                                 }
1434                         }
1435                         if (path) {
1436                                 path += remote->path_len;
1437                         }
1438                         ls->dentry_name = xmalloc(strlen(path) -
1439                                                   remote->path_len + 1);
1440                         strcpy(ls->dentry_name, path + remote->path_len);
1441                 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1442                         ls->dentry_flags |= IS_DIR;
1443                 }
1444         } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1445                 free(ls->dentry_name);
1446                 ls->dentry_name = NULL;
1447                 ls->dentry_flags = 0;
1448         }
1451 static void remote_ls(const char *path, int flags,
1452                       void (*userFunc)(struct remote_ls_ctx *ls),
1453                       void *userData)
1455         char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1456         struct active_request_slot *slot;
1457         struct slot_results results;
1458         struct strbuf in_buffer = STRBUF_INIT;
1459         struct buffer out_buffer = { STRBUF_INIT, 0 };
1460         struct curl_slist *dav_headers = NULL;
1461         struct xml_ctx ctx;
1462         struct remote_ls_ctx ls;
1464         ls.flags = flags;
1465         ls.path = xstrdup(path);
1466         ls.dentry_name = NULL;
1467         ls.dentry_flags = 0;
1468         ls.userData = userData;
1469         ls.userFunc = userFunc;
1471         sprintf(url, "%s%s", remote->url, path);
1473         strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1475         dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1476         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1478         slot = get_active_slot();
1479         slot->results = &results;
1480         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1481         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1482         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1483         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1484         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1485         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1486         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1487         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1488         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1490         if (start_active_slot(slot)) {
1491                 run_active_slot(slot);
1492                 if (results.curl_result == CURLE_OK) {
1493                         XML_Parser parser = XML_ParserCreate(NULL);
1494                         enum XML_Status result;
1495                         ctx.name = xcalloc(10, 1);
1496                         ctx.len = 0;
1497                         ctx.cdata = NULL;
1498                         ctx.userFunc = handle_remote_ls_ctx;
1499                         ctx.userData = &ls;
1500                         XML_SetUserData(parser, &ctx);
1501                         XML_SetElementHandler(parser, xml_start_tag,
1502                                               xml_end_tag);
1503                         XML_SetCharacterDataHandler(parser, xml_cdata);
1504                         result = XML_Parse(parser, in_buffer.buf,
1505                                            in_buffer.len, 1);
1506                         free(ctx.name);
1508                         if (result != XML_STATUS_OK) {
1509                                 fprintf(stderr, "XML error: %s\n",
1510                                         XML_ErrorString(
1511                                                 XML_GetErrorCode(parser)));
1512                         }
1513                         XML_ParserFree(parser);
1514                 }
1515         } else {
1516                 fprintf(stderr, "Unable to start PROPFIND request\n");
1517         }
1519         free(ls.path);
1520         free(url);
1521         strbuf_release(&out_buffer.buf);
1522         strbuf_release(&in_buffer);
1523         curl_slist_free_all(dav_headers);
1526 static void get_remote_object_list(unsigned char parent)
1528         char path[] = "objects/XX/";
1529         static const char hex[] = "0123456789abcdef";
1530         unsigned int val = parent;
1532         path[8] = hex[val >> 4];
1533         path[9] = hex[val & 0xf];
1534         remote_dir_exists[val] = 0;
1535         remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1536                   process_ls_object, &val);
1539 static int locking_available(void)
1541         struct active_request_slot *slot;
1542         struct slot_results results;
1543         struct strbuf in_buffer = STRBUF_INIT;
1544         struct buffer out_buffer = { STRBUF_INIT, 0 };
1545         struct curl_slist *dav_headers = NULL;
1546         struct xml_ctx ctx;
1547         int lock_flags = 0;
1549         strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url);
1551         dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1552         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1554         slot = get_active_slot();
1555         slot->results = &results;
1556         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1557         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1558         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1559         curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer);
1560         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
1561         curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url);
1562         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1563         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND);
1564         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1566         if (start_active_slot(slot)) {
1567                 run_active_slot(slot);
1568                 if (results.curl_result == CURLE_OK) {
1569                         XML_Parser parser = XML_ParserCreate(NULL);
1570                         enum XML_Status result;
1571                         ctx.name = xcalloc(10, 1);
1572                         ctx.len = 0;
1573                         ctx.cdata = NULL;
1574                         ctx.userFunc = handle_lockprop_ctx;
1575                         ctx.userData = &lock_flags;
1576                         XML_SetUserData(parser, &ctx);
1577                         XML_SetElementHandler(parser, xml_start_tag,
1578                                               xml_end_tag);
1579                         result = XML_Parse(parser, in_buffer.buf,
1580                                            in_buffer.len, 1);
1581                         free(ctx.name);
1583                         if (result != XML_STATUS_OK) {
1584                                 fprintf(stderr, "XML error: %s\n",
1585                                         XML_ErrorString(
1586                                                 XML_GetErrorCode(parser)));
1587                                 lock_flags = 0;
1588                         }
1589                         XML_ParserFree(parser);
1590                         if (!lock_flags)
1591                                 error("Error: no DAV locking support on %s",
1592                                       remote->url);
1594                 } else {
1595                         error("Cannot access URL %s, return code %d",
1596                               remote->url, results.curl_result);
1597                         lock_flags = 0;
1598                 }
1599         } else {
1600                 error("Unable to start PROPFIND request on %s", remote->url);
1601         }
1603         strbuf_release(&out_buffer.buf);
1604         strbuf_release(&in_buffer);
1605         curl_slist_free_all(dav_headers);
1607         return lock_flags;
1610 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1612         struct object_list *entry = xmalloc(sizeof(struct object_list));
1613         entry->item = obj;
1614         entry->next = *p;
1615         *p = entry;
1616         return &entry->next;
1619 static struct object_list **process_blob(struct blob *blob,
1620                                          struct object_list **p,
1621                                          struct name_path *path,
1622                                          const char *name)
1624         struct object *obj = &blob->object;
1626         obj->flags |= LOCAL;
1628         if (obj->flags & (UNINTERESTING | SEEN))
1629                 return p;
1631         obj->flags |= SEEN;
1632         return add_one_object(obj, p);
1635 static struct object_list **process_tree(struct tree *tree,
1636                                          struct object_list **p,
1637                                          struct name_path *path,
1638                                          const char *name)
1640         struct object *obj = &tree->object;
1641         struct tree_desc desc;
1642         struct name_entry entry;
1643         struct name_path me;
1645         obj->flags |= LOCAL;
1647         if (obj->flags & (UNINTERESTING | SEEN))
1648                 return p;
1649         if (parse_tree(tree) < 0)
1650                 die("bad tree object %s", sha1_to_hex(obj->sha1));
1652         obj->flags |= SEEN;
1653         name = xstrdup(name);
1654         p = add_one_object(obj, p);
1655         me.up = path;
1656         me.elem = name;
1657         me.elem_len = strlen(name);
1659         init_tree_desc(&desc, tree->buffer, tree->size);
1661         while (tree_entry(&desc, &entry))
1662                 switch (object_type(entry.mode)) {
1663                 case OBJ_TREE:
1664                         p = process_tree(lookup_tree(entry.sha1), p, &me, name);
1665                         break;
1666                 case OBJ_BLOB:
1667                         p = process_blob(lookup_blob(entry.sha1), p, &me, name);
1668                         break;
1669                 default:
1670                         /* Subproject commit - not in this repository */
1671                         break;
1672                 }
1674         free(tree->buffer);
1675         tree->buffer = NULL;
1676         return p;
1679 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1681         int i;
1682         struct commit *commit;
1683         struct object_list **p = &objects;
1684         int count = 0;
1686         while ((commit = get_revision(revs)) != NULL) {
1687                 p = process_tree(commit->tree, p, NULL, "");
1688                 commit->object.flags |= LOCAL;
1689                 if (!(commit->object.flags & UNINTERESTING))
1690                         count += add_send_request(&commit->object, lock);
1691         }
1693         for (i = 0; i < revs->pending.nr; i++) {
1694                 struct object_array_entry *entry = revs->pending.objects + i;
1695                 struct object *obj = entry->item;
1696                 const char *name = entry->name;
1698                 if (obj->flags & (UNINTERESTING | SEEN))
1699                         continue;
1700                 if (obj->type == OBJ_TAG) {
1701                         obj->flags |= SEEN;
1702                         p = add_one_object(obj, p);
1703                         continue;
1704                 }
1705                 if (obj->type == OBJ_TREE) {
1706                         p = process_tree((struct tree *)obj, p, NULL, name);
1707                         continue;
1708                 }
1709                 if (obj->type == OBJ_BLOB) {
1710                         p = process_blob((struct blob *)obj, p, NULL, name);
1711                         continue;
1712                 }
1713                 die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name);
1714         }
1716         while (objects) {
1717                 if (!(objects->item->flags & UNINTERESTING))
1718                         count += add_send_request(objects->item, lock);
1719                 objects = objects->next;
1720         }
1722         return count;
1725 static int update_remote(unsigned char *sha1, struct remote_lock *lock)
1727         struct active_request_slot *slot;
1728         struct slot_results results;
1729         char *if_header;
1730         struct buffer out_buffer = { STRBUF_INIT, 0 };
1731         struct curl_slist *dav_headers = NULL;
1733         if_header = xmalloc(strlen(lock->token) + 25);
1734         sprintf(if_header, "If: (<%s>)", lock->token);
1735         dav_headers = curl_slist_append(dav_headers, if_header);
1737         strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1));
1739         slot = get_active_slot();
1740         slot->results = &results;
1741         curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer);
1742         curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len);
1743         curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1744         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1745         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1746         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1747         curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1748         curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1749         curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1751         if (start_active_slot(slot)) {
1752                 run_active_slot(slot);
1753                 strbuf_release(&out_buffer.buf);
1754                 free(if_header);
1755                 if (results.curl_result != CURLE_OK) {
1756                         fprintf(stderr,
1757                                 "PUT error: curl result=%d, HTTP code=%ld\n",
1758                                 results.curl_result, results.http_code);
1759                         /* We should attempt recovery? */
1760                         return 0;
1761                 }
1762         } else {
1763                 strbuf_release(&out_buffer.buf);
1764                 free(if_header);
1765                 fprintf(stderr, "Unable to start PUT request\n");
1766                 return 0;
1767         }
1769         return 1;
1772 static struct ref *local_refs, **local_tail;
1773 static struct ref *remote_refs, **remote_tail;
1775 static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data)
1777         struct ref *ref;
1778         int len = strlen(refname) + 1;
1779         ref = xcalloc(1, sizeof(*ref) + len);
1780         hashcpy(ref->new_sha1, sha1);
1781         memcpy(ref->name, refname, len);
1782         *local_tail = ref;
1783         local_tail = &ref->next;
1784         return 0;
1787 static void one_remote_ref(char *refname)
1789         struct ref *ref;
1790         struct object *obj;
1792         ref = alloc_ref(refname);
1794         if (http_fetch_ref(remote->url, ref) != 0) {
1795                 fprintf(stderr,
1796                         "Unable to fetch ref %s from %s\n",
1797                         refname, remote->url);
1798                 free(ref);
1799                 return;
1800         }
1802         /*
1803          * Fetch a copy of the object if it doesn't exist locally - it
1804          * may be required for updating server info later.
1805          */
1806         if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) {
1807                 obj = lookup_unknown_object(ref->old_sha1);
1808                 if (obj) {
1809                         fprintf(stderr, "  fetch %s for %s\n",
1810                                 sha1_to_hex(ref->old_sha1), refname);
1811                         add_fetch_request(obj);
1812                 }
1813         }
1815         *remote_tail = ref;
1816         remote_tail = &ref->next;
1819 static void get_local_heads(void)
1821         local_tail = &local_refs;
1822         for_each_ref(one_local_ref, NULL);
1825 static void get_dav_remote_heads(void)
1827         remote_tail = &remote_refs;
1828         remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1831 static int is_zero_sha1(const unsigned char *sha1)
1833         int i;
1835         for (i = 0; i < 20; i++) {
1836                 if (*sha1++)
1837                         return 0;
1838         }
1839         return 1;
1842 static void unmark_and_free(struct commit_list *list, unsigned int mark)
1844         while (list) {
1845                 struct commit_list *temp = list;
1846                 temp->item->object.flags &= ~mark;
1847                 list = temp->next;
1848                 free(temp);
1849         }
1852 static int ref_newer(const unsigned char *new_sha1,
1853                      const unsigned char *old_sha1)
1855         struct object *o;
1856         struct commit *old, *new;
1857         struct commit_list *list, *used;
1858         int found = 0;
1860         /* Both new and old must be commit-ish and new is descendant of
1861          * old.  Otherwise we require --force.
1862          */
1863         o = deref_tag(parse_object(old_sha1), NULL, 0);
1864         if (!o || o->type != OBJ_COMMIT)
1865                 return 0;
1866         old = (struct commit *) o;
1868         o = deref_tag(parse_object(new_sha1), NULL, 0);
1869         if (!o || o->type != OBJ_COMMIT)
1870                 return 0;
1871         new = (struct commit *) o;
1873         if (parse_commit(new) < 0)
1874                 return 0;
1876         used = list = NULL;
1877         commit_list_insert(new, &list);
1878         while (list) {
1879                 new = pop_most_recent_commit(&list, TMP_MARK);
1880                 commit_list_insert(new, &used);
1881                 if (new == old) {
1882                         found = 1;
1883                         break;
1884                 }
1885         }
1886         unmark_and_free(list, TMP_MARK);
1887         unmark_and_free(used, TMP_MARK);
1888         return found;
1891 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1893         struct strbuf *buf = (struct strbuf *)ls->userData;
1894         struct object *o;
1895         int len;
1896         char *ref_info;
1897         struct ref *ref;
1899         ref = alloc_ref(ls->dentry_name);
1901         if (http_fetch_ref(remote->url, ref) != 0) {
1902                 fprintf(stderr,
1903                         "Unable to fetch ref %s from %s\n",
1904                         ls->dentry_name, remote->url);
1905                 aborted = 1;
1906                 free(ref);
1907                 return;
1908         }
1910         o = parse_object(ref->old_sha1);
1911         if (!o) {
1912                 fprintf(stderr,
1913                         "Unable to parse object %s for remote ref %s\n",
1914                         sha1_to_hex(ref->old_sha1), ls->dentry_name);
1915                 aborted = 1;
1916                 free(ref);
1917                 return;
1918         }
1920         len = strlen(ls->dentry_name) + 42;
1921         ref_info = xcalloc(len + 1, 1);
1922         sprintf(ref_info, "%s   %s\n",
1923                 sha1_to_hex(ref->old_sha1), ls->dentry_name);
1924         fwrite_buffer(ref_info, 1, len, buf);
1925         free(ref_info);
1927         if (o->type == OBJ_TAG) {
1928                 o = deref_tag(o, ls->dentry_name, 0);
1929                 if (o) {
1930                         len = strlen(ls->dentry_name) + 45;
1931                         ref_info = xcalloc(len + 1, 1);
1932                         sprintf(ref_info, "%s   %s^{}\n",
1933                                 sha1_to_hex(o->sha1), ls->dentry_name);
1934                         fwrite_buffer(ref_info, 1, len, buf);
1935                         free(ref_info);
1936                 }
1937         }
1938         free(ref);
1941 static void update_remote_info_refs(struct remote_lock *lock)
1943         struct buffer buffer = { STRBUF_INIT, 0 };
1944         struct active_request_slot *slot;
1945         struct slot_results results;
1946         char *if_header;
1947         struct curl_slist *dav_headers = NULL;
1949         remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1950                   add_remote_info_ref, &buffer.buf);
1951         if (!aborted) {
1952                 if_header = xmalloc(strlen(lock->token) + 25);
1953                 sprintf(if_header, "If: (<%s>)", lock->token);
1954                 dav_headers = curl_slist_append(dav_headers, if_header);
1956                 slot = get_active_slot();
1957                 slot->results = &results;
1958                 curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer);
1959                 curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len);
1960                 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer);
1961                 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
1962                 curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT);
1963                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1964                 curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1);
1965                 curl_easy_setopt(slot->curl, CURLOPT_PUT, 1);
1966                 curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url);
1968                 if (start_active_slot(slot)) {
1969                         run_active_slot(slot);
1970                         if (results.curl_result != CURLE_OK) {
1971                                 fprintf(stderr,
1972                                         "PUT error: curl result=%d, HTTP code=%ld\n",
1973                                         results.curl_result, results.http_code);
1974                         }
1975                 }
1976                 free(if_header);
1977         }
1978         strbuf_release(&buffer.buf);
1981 static int remote_exists(const char *path)
1983         char *url = xmalloc(strlen(remote->url) + strlen(path) + 1);
1984         struct active_request_slot *slot;
1985         struct slot_results results;
1986         int ret = -1;
1988         sprintf(url, "%s%s", remote->url, path);
1990         slot = get_active_slot();
1991         slot->results = &results;
1992         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
1993         curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1);
1995         if (start_active_slot(slot)) {
1996                 run_active_slot(slot);
1997                 if (results.http_code == 404)
1998                         ret = 0;
1999                 else if (results.curl_result == CURLE_OK)
2000                         ret = 1;
2001                 else
2002                         fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code);
2003         } else {
2004                 fprintf(stderr, "Unable to start HEAD request\n");
2005         }
2007         free(url);
2008         return ret;
2011 static void fetch_symref(const char *path, char **symref, unsigned char *sha1)
2013         char *url;
2014         struct strbuf buffer = STRBUF_INIT;
2015         struct active_request_slot *slot;
2016         struct slot_results results;
2018         url = xmalloc(strlen(remote->url) + strlen(path) + 1);
2019         sprintf(url, "%s%s", remote->url, path);
2021         slot = get_active_slot();
2022         slot->results = &results;
2023         curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer);
2024         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
2025         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL);
2026         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2027         if (start_active_slot(slot)) {
2028                 run_active_slot(slot);
2029                 if (results.curl_result != CURLE_OK) {
2030                         die("Couldn't get %s for remote symref\n%s",
2031                             url, curl_errorstr);
2032                 }
2033         } else {
2034                 die("Unable to start remote symref request");
2035         }
2036         free(url);
2038         free(*symref);
2039         *symref = NULL;
2040         hashclr(sha1);
2042         if (buffer.len == 0)
2043                 return;
2045         /* If it's a symref, set the refname; otherwise try for a sha1 */
2046         if (!prefixcmp((char *)buffer.buf, "ref: ")) {
2047                 *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6);
2048         } else {
2049                 get_sha1_hex(buffer.buf, sha1);
2050         }
2052         strbuf_release(&buffer);
2055 static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1)
2057         struct commit *head = lookup_commit(head_sha1);
2058         struct commit *branch = lookup_commit(branch_sha1);
2059         struct commit_list *merge_bases = get_merge_bases(head, branch, 1);
2061         return (merge_bases && !merge_bases->next && merge_bases->item == branch);
2064 static int delete_remote_branch(char *pattern, int force)
2066         struct ref *refs = remote_refs;
2067         struct ref *remote_ref = NULL;
2068         unsigned char head_sha1[20];
2069         char *symref = NULL;
2070         int match;
2071         int patlen = strlen(pattern);
2072         int i;
2073         struct active_request_slot *slot;
2074         struct slot_results results;
2075         char *url;
2077         /* Find the remote branch(es) matching the specified branch name */
2078         for (match = 0; refs; refs = refs->next) {
2079                 char *name = refs->name;
2080                 int namelen = strlen(name);
2081                 if (namelen < patlen ||
2082                     memcmp(name + namelen - patlen, pattern, patlen))
2083                         continue;
2084                 if (namelen != patlen && name[namelen - patlen - 1] != '/')
2085                         continue;
2086                 match++;
2087                 remote_ref = refs;
2088         }
2089         if (match == 0)
2090                 return error("No remote branch matches %s", pattern);
2091         if (match != 1)
2092                 return error("More than one remote branch matches %s",
2093                              pattern);
2095         /*
2096          * Remote HEAD must be a symref (not exactly foolproof; a remote
2097          * symlink to a symref will look like a symref)
2098          */
2099         fetch_symref("HEAD", &symref, head_sha1);
2100         if (!symref)
2101                 return error("Remote HEAD is not a symref");
2103         /* Remote branch must not be the remote HEAD */
2104         for (i=0; symref && i<MAXDEPTH; i++) {
2105                 if (!strcmp(remote_ref->name, symref))
2106                         return error("Remote branch %s is the current HEAD",
2107                                      remote_ref->name);
2108                 fetch_symref(symref, &symref, head_sha1);
2109         }
2111         /* Run extra sanity checks if delete is not forced */
2112         if (!force) {
2113                 /* Remote HEAD must resolve to a known object */
2114                 if (symref)
2115                         return error("Remote HEAD symrefs too deep");
2116                 if (is_zero_sha1(head_sha1))
2117                         return error("Unable to resolve remote HEAD");
2118                 if (!has_sha1_file(head_sha1))
2119                         return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1));
2121                 /* Remote branch must resolve to a known object */
2122                 if (is_zero_sha1(remote_ref->old_sha1))
2123                         return error("Unable to resolve remote branch %s",
2124                                      remote_ref->name);
2125                 if (!has_sha1_file(remote_ref->old_sha1))
2126                         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));
2128                 /* Remote branch must be an ancestor of remote HEAD */
2129                 if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) {
2130                         return error("The branch '%s' is not an ancestor "
2131                                      "of your current HEAD.\n"
2132                                      "If you are sure you want to delete it,"
2133                                      " run:\n\t'git http-push -D %s %s'",
2134                                      remote_ref->name, remote->url, pattern);
2135                 }
2136         }
2138         /* Send delete request */
2139         fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
2140         if (dry_run)
2141                 return 0;
2142         url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1);
2143         sprintf(url, "%s%s", remote->url, remote_ref->name);
2144         slot = get_active_slot();
2145         slot->results = &results;
2146         curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1);
2147         curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null);
2148         curl_easy_setopt(slot->curl, CURLOPT_URL, url);
2149         curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE);
2150         if (start_active_slot(slot)) {
2151                 run_active_slot(slot);
2152                 free(url);
2153                 if (results.curl_result != CURLE_OK)
2154                         return error("DELETE request failed (%d/%ld)\n",
2155                                      results.curl_result, results.http_code);
2156         } else {
2157                 free(url);
2158                 return error("Unable to start DELETE request");
2159         }
2161         return 0;
2164 int main(int argc, char **argv)
2166         struct transfer_request *request;
2167         struct transfer_request *next_request;
2168         int nr_refspec = 0;
2169         char **refspec = NULL;
2170         struct remote_lock *ref_lock = NULL;
2171         struct remote_lock *info_ref_lock = NULL;
2172         struct rev_info revs;
2173         int delete_branch = 0;
2174         int force_delete = 0;
2175         int objects_to_send;
2176         int rc = 0;
2177         int i;
2178         int new_refs;
2179         struct ref *ref;
2180         char *rewritten_url = NULL;
2182         setup_git_directory();
2184         remote = xcalloc(sizeof(*remote), 1);
2186         argv++;
2187         for (i = 1; i < argc; i++, argv++) {
2188                 char *arg = *argv;
2190                 if (*arg == '-') {
2191                         if (!strcmp(arg, "--all")) {
2192                                 push_all = MATCH_REFS_ALL;
2193                                 continue;
2194                         }
2195                         if (!strcmp(arg, "--force")) {
2196                                 force_all = 1;
2197                                 continue;
2198                         }
2199                         if (!strcmp(arg, "--dry-run")) {
2200                                 dry_run = 1;
2201                                 continue;
2202                         }
2203                         if (!strcmp(arg, "--verbose")) {
2204                                 push_verbosely = 1;
2205                                 continue;
2206                         }
2207                         if (!strcmp(arg, "-d")) {
2208                                 delete_branch = 1;
2209                                 continue;
2210                         }
2211                         if (!strcmp(arg, "-D")) {
2212                                 delete_branch = 1;
2213                                 force_delete = 1;
2214                                 continue;
2215                         }
2216                 }
2217                 if (!remote->url) {
2218                         char *path = strstr(arg, "//");
2219                         remote->url = arg;
2220                         remote->path_len = strlen(arg);
2221                         if (path) {
2222                                 remote->path = strchr(path+2, '/');
2223                                 if (remote->path)
2224                                         remote->path_len = strlen(remote->path);
2225                         }
2226                         continue;
2227                 }
2228                 refspec = argv;
2229                 nr_refspec = argc - i;
2230                 break;
2231         }
2233 #ifndef USE_CURL_MULTI
2234         die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI");
2235 #endif
2237         if (!remote->url)
2238                 usage(http_push_usage);
2240         if (delete_branch && nr_refspec != 1)
2241                 die("You must specify only one branch name when deleting a remote branch");
2243         memset(remote_dir_exists, -1, 256);
2245         http_init(NULL);
2247         no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:");
2249         if (remote->url && remote->url[strlen(remote->url)-1] != '/') {
2250                 rewritten_url = xmalloc(strlen(remote->url)+2);
2251                 strcpy(rewritten_url, remote->url);
2252                 strcat(rewritten_url, "/");
2253                 remote->path = rewritten_url + (remote->path - remote->url);
2254                 remote->path_len++;
2255                 remote->url = rewritten_url;
2256         }
2258         /* Verify DAV compliance/lock support */
2259         if (!locking_available()) {
2260                 rc = 1;
2261                 goto cleanup;
2262         }
2264         signal(SIGINT, remove_locks_on_signal);
2265         signal(SIGHUP, remove_locks_on_signal);
2266         signal(SIGQUIT, remove_locks_on_signal);
2267         signal(SIGTERM, remove_locks_on_signal);
2269         /* Check whether the remote has server info files */
2270         remote->can_update_info_refs = 0;
2271         remote->has_info_refs = remote_exists("info/refs");
2272         remote->has_info_packs = remote_exists("objects/info/packs");
2273         if (remote->has_info_refs) {
2274                 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
2275                 if (info_ref_lock)
2276                         remote->can_update_info_refs = 1;
2277                 else {
2278                         fprintf(stderr, "Error: cannot lock existing info/refs\n");
2279                         rc = 1;
2280                         goto cleanup;
2281                 }
2282         }
2283         if (remote->has_info_packs)
2284                 fetch_indices();
2286         /* Get a list of all local and remote heads to validate refspecs */
2287         get_local_heads();
2288         fprintf(stderr, "Fetching remote heads...\n");
2289         get_dav_remote_heads();
2291         /* Remove a remote branch if -d or -D was specified */
2292         if (delete_branch) {
2293                 if (delete_remote_branch(refspec[0], force_delete) == -1)
2294                         fprintf(stderr, "Unable to delete remote branch %s\n",
2295                                 refspec[0]);
2296                 goto cleanup;
2297         }
2299         /* match them up */
2300         if (!remote_tail)
2301                 remote_tail = &remote_refs;
2302         if (match_refs(local_refs, remote_refs, &remote_tail,
2303                        nr_refspec, (const char **) refspec, push_all)) {
2304                 rc = -1;
2305                 goto cleanup;
2306         }
2307         if (!remote_refs) {
2308                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
2309                 rc = 0;
2310                 goto cleanup;
2311         }
2313         new_refs = 0;
2314         for (ref = remote_refs; ref; ref = ref->next) {
2315                 char old_hex[60], *new_hex;
2316                 const char *commit_argv[4];
2317                 int commit_argc;
2318                 char *new_sha1_hex, *old_sha1_hex;
2320                 if (!ref->peer_ref)
2321                         continue;
2323                 if (is_zero_sha1(ref->peer_ref->new_sha1)) {
2324                         if (delete_remote_branch(ref->name, 1) == -1) {
2325                                 error("Could not remove %s", ref->name);
2326                                 rc = -4;
2327                         }
2328                         new_refs++;
2329                         continue;
2330                 }
2332                 if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) {
2333                         if (push_verbosely || 1)
2334                                 fprintf(stderr, "'%s': up-to-date\n", ref->name);
2335                         continue;
2336                 }
2338                 if (!force_all &&
2339                     !is_zero_sha1(ref->old_sha1) &&
2340                     !ref->force) {
2341                         if (!has_sha1_file(ref->old_sha1) ||
2342                             !ref_newer(ref->peer_ref->new_sha1,
2343                                        ref->old_sha1)) {
2344                                 /*
2345                                  * We do not have the remote ref, or
2346                                  * we know that the remote ref is not
2347                                  * an ancestor of what we are trying to
2348                                  * push.  Either way this can be losing
2349                                  * commits at the remote end and likely
2350                                  * we were not up to date to begin with.
2351                                  */
2352                                 error("remote '%s' is not an ancestor of\n"
2353                                       "local '%s'.\n"
2354                                       "Maybe you are not up-to-date and "
2355                                       "need to pull first?",
2356                                       ref->name,
2357                                       ref->peer_ref->name);
2358                                 rc = -2;
2359                                 continue;
2360                         }
2361                 }
2362                 hashcpy(ref->new_sha1, ref->peer_ref->new_sha1);
2363                 new_refs++;
2364                 strcpy(old_hex, sha1_to_hex(ref->old_sha1));
2365                 new_hex = sha1_to_hex(ref->new_sha1);
2367                 fprintf(stderr, "updating '%s'", ref->name);
2368                 if (strcmp(ref->name, ref->peer_ref->name))
2369                         fprintf(stderr, " using '%s'", ref->peer_ref->name);
2370                 fprintf(stderr, "\n  from %s\n  to   %s\n", old_hex, new_hex);
2371                 if (dry_run)
2372                         continue;
2374                 /* Lock remote branch ref */
2375                 ref_lock = lock_remote(ref->name, LOCK_TIME);
2376                 if (ref_lock == NULL) {
2377                         fprintf(stderr, "Unable to lock remote branch %s\n",
2378                                 ref->name);
2379                         rc = 1;
2380                         continue;
2381                 }
2383                 /* Set up revision info for this refspec */
2384                 commit_argc = 3;
2385                 new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1));
2386                 old_sha1_hex = NULL;
2387                 commit_argv[1] = "--objects";
2388                 commit_argv[2] = new_sha1_hex;
2389                 if (!push_all && !is_zero_sha1(ref->old_sha1)) {
2390                         old_sha1_hex = xmalloc(42);
2391                         sprintf(old_sha1_hex, "^%s",
2392                                 sha1_to_hex(ref->old_sha1));
2393                         commit_argv[3] = old_sha1_hex;
2394                         commit_argc++;
2395                 }
2396                 init_revisions(&revs, setup_git_directory());
2397                 setup_revisions(commit_argc, commit_argv, &revs, NULL);
2398                 revs.edge_hint = 0; /* just in case */
2399                 free(new_sha1_hex);
2400                 if (old_sha1_hex) {
2401                         free(old_sha1_hex);
2402                         commit_argv[1] = NULL;
2403                 }
2405                 /* Generate a list of objects that need to be pushed */
2406                 pushing = 0;
2407                 if (prepare_revision_walk(&revs))
2408                         die("revision walk setup failed");
2409                 mark_edges_uninteresting(revs.commits, &revs, NULL);
2410                 objects_to_send = get_delta(&revs, ref_lock);
2411                 finish_all_active_slots();
2413                 /* Push missing objects to remote, this would be a
2414                    convenient time to pack them first if appropriate. */
2415                 pushing = 1;
2416                 if (objects_to_send)
2417                         fprintf(stderr, "    sending %d objects\n",
2418                                 objects_to_send);
2419 #ifdef USE_CURL_MULTI
2420                 fill_active_slots();
2421                 add_fill_function(NULL, fill_active_slot);
2422 #endif
2423                 do {
2424                         finish_all_active_slots();
2425 #ifdef USE_CURL_MULTI
2426                         fill_active_slots();
2427 #endif
2428                 } while (request_queue_head && !aborted);
2430                 /* Update the remote branch if all went well */
2431                 if (aborted || !update_remote(ref->new_sha1, ref_lock))
2432                         rc = 1;
2434                 if (!rc)
2435                         fprintf(stderr, "    done\n");
2436                 unlock_remote(ref_lock);
2437                 check_locks();
2438         }
2440         /* Update remote server info if appropriate */
2441         if (remote->has_info_refs && new_refs) {
2442                 if (info_ref_lock && remote->can_update_info_refs) {
2443                         fprintf(stderr, "Updating remote server info\n");
2444                         if (!dry_run)
2445                                 update_remote_info_refs(info_ref_lock);
2446                 } else {
2447                         fprintf(stderr, "Unable to update server info\n");
2448                 }
2449         }
2451  cleanup:
2452         free(rewritten_url);
2453         if (info_ref_lock)
2454                 unlock_remote(info_ref_lock);
2455         free(remote);
2457         curl_slist_free_all(no_pragma_header);
2459         http_cleanup();
2461         request = request_queue_head;
2462         while (request != NULL) {
2463                 next_request = request->next;
2464                 release_request(request);
2465                 request = next_request;
2466         }
2468         return rc;