http-push.c

   1 #define USE_THE_REPOSITORY_VARIABLE
   2
   3 #include "git-compat-util.h"
   4 #include "environment.h"
   5 #include "hex.h"
   6 #include "repository.h"
   7 #include "commit.h"
   8 #include "tag.h"
   9 #include "blob.h"
  10 #include "http.h"
  11 #include "diff.h"
  12 #include "revision.h"
  13 #include "remote.h"
  14 #include "list-objects.h"
  15 #include "setup.h"
  16 #include "sigchain.h"
  17 #include "strvec.h"
  18 #include "tree.h"
  19 #include "tree-walk.h"
  20 #include "url.h"
  21 #include "packfile.h"
  22 #include "object-store-ll.h"
  23 #include "commit-reach.h"
  24
  25 #ifdef EXPAT_NEEDS_XMLPARSE_H
  26 #include <xmlparse.h>
  27 #else
  28 #include <expat.h>
  29 #endif
  30
  31 static const char http_push_usage[] =
  32 "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n";
  33
  34 #ifndef XML_STATUS_OK
  35 enum XML_Status {
  36   XML_STATUS_OK = 1,
  37   XML_STATUS_ERROR = 0
  38 };
  39 #define XML_STATUS_OK    1
  40 #define XML_STATUS_ERROR 0
  41 #endif
  42
  43 #define PREV_BUF_SIZE 4096
  44
  45 /* DAV methods */
  46 #define DAV_LOCK "LOCK"
  47 #define DAV_MKCOL "MKCOL"
  48 #define DAV_MOVE "MOVE"
  49 #define DAV_PROPFIND "PROPFIND"
  50 #define DAV_PUT "PUT"
  51 #define DAV_UNLOCK "UNLOCK"
  52 #define DAV_DELETE "DELETE"
  53
  54 /* DAV lock flags */
  55 #define DAV_PROP_LOCKWR (1u << 0)
  56 #define DAV_PROP_LOCKEX (1u << 1)
  57 #define DAV_LOCK_OK (1u << 2)
  58
  59 /* DAV XML properties */
  60 #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry"
  61 #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write"
  62 #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive"
  63 #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href"
  64 #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout"
  65 #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href"
  66 #define DAV_PROPFIND_RESP ".multistatus.response"
  67 #define DAV_PROPFIND_NAME ".multistatus.response.href"
  68 #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection"
  69
  70 /* DAV request body templates */
  71 #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>"
  72 #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>"
  73 #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>"
  74
  75 #define LOCK_TIME 600
  76 #define LOCK_REFRESH 30
  77
  78 /* Remember to update object flag allocation in object.h */
  79 #define LOCAL    (1u<<11)
  80 #define REMOTE   (1u<<12)
  81 #define FETCHING (1u<<13)
  82 #define PUSHING  (1u<<14)
  83
  84 /* We allow "recursive" symbolic refs. Only within reason, though */
  85 #define MAXDEPTH 5
  86
  87 static int pushing;
  88 static int aborted;
  89 static signed char remote_dir_exists[256];
  90
  91 static int push_verbosely;
  92 static int push_all = MATCH_REFS_NONE;
  93 static int force_all;
  94 static int dry_run;
  95 static int helper_status;
  96
  97 static struct object_list *objects;
  98
  99 struct repo {
 100         char *url;
 101         char *path;
 102         int path_len;
 103         int has_info_refs;
 104         int can_update_info_refs;
 105         int has_info_packs;
 106         struct packed_git *packs;
 107         struct remote_lock *locks;
 108 };
 109
 110 static struct repo *repo;
 111
 112 enum transfer_state {
 113         NEED_FETCH,
 114         RUN_FETCH_LOOSE,
 115         RUN_FETCH_PACKED,
 116         NEED_PUSH,
 117         RUN_MKCOL,
 118         RUN_PUT,
 119         RUN_MOVE,
 120         ABORTED,
 121         COMPLETE
 122 };
 123
 124 struct transfer_request {
 125         struct object *obj;
 126         struct packed_git *target;
 127         char *url;
 128         char *dest;
 129         struct remote_lock *lock;
 130         struct curl_slist *headers;
 131         struct buffer buffer;
 132         enum transfer_state state;
 133         CURLcode curl_result;
 134         char errorstr[CURL_ERROR_SIZE];
 135         long http_code;
 136         void *userData;
 137         struct active_request_slot *slot;
 138         struct transfer_request *next;
 139 };
 140
 141 static struct transfer_request *request_queue_head;
 142
 143 struct xml_ctx {
 144         char *name;
 145         int len;
 146         char *cdata;
 147         void (*userFunc)(struct xml_ctx *ctx, int tag_closed);
 148         void *userData;
 149 };
 150
 151 struct remote_lock {
 152         char *url;
 153         char *owner;
 154         char *token;
 155         char tmpfile_suffix[GIT_MAX_HEXSZ + 1];
 156         time_t start_time;
 157         long timeout;
 158         int refreshing;
 159         struct remote_lock *next;
 160 };
 161
 162 /* Flags that control remote_ls processing */
 163 #define PROCESS_FILES (1u << 0)
 164 #define PROCESS_DIRS  (1u << 1)
 165 #define RECURSIVE     (1u << 2)
 166
 167 /* Flags that remote_ls passes to callback functions */
 168 #define IS_DIR (1u << 0)
 169
 170 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 };
 179
 180 /* get_dav_token_headers options */
 181 enum dav_header_flag {
 182         DAV_HEADER_IF = (1u << 0),
 183         DAV_HEADER_LOCK = (1u << 1),
 184         DAV_HEADER_TIMEOUT = (1u << 2)
 185 };
 186
 187 static char *xml_entities(const char *s)
 188 {
 189         struct strbuf buf = STRBUF_INIT;
 190         strbuf_addstr_xml_quoted(&buf, s);
 191         return strbuf_detach(&buf, NULL);
 192 }
 193
 194 static void curl_setup_http_get(CURL *curl, const char *url,
 195                 const char *custom_req)
 196 {
 197         curl_easy_setopt(curl, CURLOPT_HTTPGET, 1);
 198         curl_easy_setopt(curl, CURLOPT_URL, url);
 199         curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
 200         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, fwrite_null);
 201 }
 202
 203 static void curl_setup_http(CURL *curl, const char *url,
 204                 const char *custom_req, struct buffer *buffer,
 205                 curl_write_callback write_fn)
 206 {
 207         curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
 208         curl_easy_setopt(curl, CURLOPT_URL, url);
 209         curl_easy_setopt(curl, CURLOPT_INFILE, buffer);
 210         curl_easy_setopt(curl, CURLOPT_INFILESIZE, buffer->buf.len);
 211         curl_easy_setopt(curl, CURLOPT_READFUNCTION, fread_buffer);
 212         curl_easy_setopt(curl, CURLOPT_SEEKFUNCTION, seek_buffer);
 213         curl_easy_setopt(curl, CURLOPT_SEEKDATA, buffer);
 214         curl_easy_setopt(curl, CURLOPT_WRITEFUNCTION, write_fn);
 215         curl_easy_setopt(curl, CURLOPT_NOBODY, 0);
 216         curl_easy_setopt(curl, CURLOPT_CUSTOMREQUEST, custom_req);
 217         curl_easy_setopt(curl, CURLOPT_UPLOAD, 1);
 218 }
 219
 220 static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options)
 221 {
 222         struct strbuf buf = STRBUF_INIT;
 223         struct curl_slist *dav_headers = http_copy_default_headers();
 224
 225         if (options & DAV_HEADER_IF) {
 226                 strbuf_addf(&buf, "If: (<%s>)", lock->token);
 227                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 228                 strbuf_reset(&buf);
 229         }
 230         if (options & DAV_HEADER_LOCK) {
 231                 strbuf_addf(&buf, "Lock-Token: <%s>", lock->token);
 232                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 233                 strbuf_reset(&buf);
 234         }
 235         if (options & DAV_HEADER_TIMEOUT) {
 236                 strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout);
 237                 dav_headers = curl_slist_append(dav_headers, buf.buf);
 238                 strbuf_reset(&buf);
 239         }
 240         strbuf_release(&buf);
 241
 242         return dav_headers;
 243 }
 244
 245 static void finish_request(struct transfer_request *request);
 246 static void release_request(struct transfer_request *request);
 247
 248 static void process_response(void *callback_data)
 249 {
 250         struct transfer_request *request =
 251                 (struct transfer_request *)callback_data;
 252
 253         finish_request(request);
 254 }
 255
 256 static void start_fetch_loose(struct transfer_request *request)
 257 {
 258         struct active_request_slot *slot;
 259         struct http_object_request *obj_req;
 260
 261         obj_req = new_http_object_request(repo->url, &request->obj->oid);
 262         if (!obj_req) {
 263                 request->state = ABORTED;
 264                 return;
 265         }
 266
 267         slot = obj_req->slot;
 268         slot->callback_func = process_response;
 269         slot->callback_data = request;
 270         request->slot = slot;
 271         request->userData = obj_req;
 272
 273         /* Try to get the request started, abort the request on error */
 274         request->state = RUN_FETCH_LOOSE;
 275         if (!start_active_slot(slot)) {
 276                 fprintf(stderr, "Unable to start GET request\n");
 277                 repo->can_update_info_refs = 0;
 278                 release_http_object_request(&obj_req);
 279                 release_request(request);
 280         }
 281 }
 282
 283 static void start_mkcol(struct transfer_request *request)
 284 {
 285         char *hex = oid_to_hex(&request->obj->oid);
 286         struct active_request_slot *slot;
 287
 288         request->url = get_remote_object_url(repo->url, hex, 1);
 289
 290         slot = get_active_slot();
 291         slot->callback_func = process_response;
 292         slot->callback_data = request;
 293         curl_setup_http_get(slot->curl, request->url, DAV_MKCOL);
 294         curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr);
 295
 296         if (start_active_slot(slot)) {
 297                 request->slot = slot;
 298                 request->state = RUN_MKCOL;
 299         } else {
 300                 request->state = ABORTED;
 301                 FREE_AND_NULL(request->url);
 302         }
 303 }
 304
 305 static void start_fetch_packed(struct transfer_request *request)
 306 {
 307         struct packed_git *target;
 308
 309         struct transfer_request *check_request = request_queue_head;
 310         struct http_pack_request *preq;
 311
 312         target = find_oid_pack(&request->obj->oid, repo->packs);
 313         if (!target) {
 314                 fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", oid_to_hex(&request->obj->oid));
 315                 repo->can_update_info_refs = 0;
 316                 release_request(request);
 317                 return;
 318         }
 319         close_pack_index(target);
 320         request->target = target;
 321
 322         fprintf(stderr, "Fetching pack %s\n",
 323                 hash_to_hex(target->hash));
 324         fprintf(stderr, " which contains %s\n", oid_to_hex(&request->obj->oid));
 325
 326         preq = new_http_pack_request(target->hash, repo->url);
 327         if (!preq) {
 328                 repo->can_update_info_refs = 0;
 329                 return;
 330         }
 331
 332         /* Make sure there isn't another open request for this pack */
 333         while (check_request) {
 334                 if (check_request->state == RUN_FETCH_PACKED &&
 335                     !strcmp(check_request->url, preq->url)) {
 336                         release_http_pack_request(preq);
 337                         release_request(request);
 338                         return;
 339                 }
 340                 check_request = check_request->next;
 341         }
 342
 343         preq->slot->callback_func = process_response;
 344         preq->slot->callback_data = request;
 345         request->slot = preq->slot;
 346         request->userData = preq;
 347
 348         /* Try to get the request started, abort the request on error */
 349         request->state = RUN_FETCH_PACKED;
 350         if (!start_active_slot(preq->slot)) {
 351                 fprintf(stderr, "Unable to start GET request\n");
 352                 release_http_pack_request(preq);
 353                 repo->can_update_info_refs = 0;
 354                 release_request(request);
 355         }
 356 }
 357
 358 static void start_put(struct transfer_request *request)
 359 {
 360         char *hex = oid_to_hex(&request->obj->oid);
 361         struct active_request_slot *slot;
 362         struct strbuf buf = STRBUF_INIT;
 363         enum object_type type;
 364         char hdr[50];
 365         void *unpacked;
 366         unsigned long len;
 367         int hdrlen;
 368         ssize_t size;
 369         git_zstream stream;
 370
 371         unpacked = repo_read_object_file(the_repository, &request->obj->oid,
 372                                          &type, &len);
 373         hdrlen = format_object_header(hdr, sizeof(hdr), type, len);
 374
 375         /* Set it up */
 376         git_deflate_init(&stream, zlib_compression_level);
 377         size = git_deflate_bound(&stream, len + hdrlen);
 378         strbuf_grow(&request->buffer.buf, size);
 379         request->buffer.posn = 0;
 380
 381         /* Compress it */
 382         stream.next_out = (unsigned char *)request->buffer.buf.buf;
 383         stream.avail_out = size;
 384
 385         /* First header.. */
 386         stream.next_in = (void *)hdr;
 387         stream.avail_in = hdrlen;
 388         while (git_deflate(&stream, 0) == Z_OK)
 389                 ; /* nothing */
 390
 391         /* Then the data itself.. */
 392         stream.next_in = unpacked;
 393         stream.avail_in = len;
 394         while (git_deflate(&stream, Z_FINISH) == Z_OK)
 395                 ; /* nothing */
 396         git_deflate_end(&stream);
 397         free(unpacked);
 398
 399         request->buffer.buf.len = stream.total_out;
 400
 401         strbuf_addstr(&buf, "Destination: ");
 402         append_remote_object_url(&buf, repo->url, hex, 0);
 403         request->dest = strbuf_detach(&buf, NULL);
 404
 405         append_remote_object_url(&buf, repo->url, hex, 0);
 406         strbuf_add(&buf, request->lock->tmpfile_suffix, the_hash_algo->hexsz + 1);
 407         request->url = strbuf_detach(&buf, NULL);
 408
 409         slot = get_active_slot();
 410         slot->callback_func = process_response;
 411         slot->callback_data = request;
 412         curl_setup_http(slot->curl, request->url, DAV_PUT,
 413                         &request->buffer, fwrite_null);
 414
 415         if (start_active_slot(slot)) {
 416                 request->slot = slot;
 417                 request->state = RUN_PUT;
 418         } else {
 419                 request->state = ABORTED;
 420                 FREE_AND_NULL(request->url);
 421         }
 422 }
 423
 424 static void start_move(struct transfer_request *request)
 425 {
 426         struct active_request_slot *slot;
 427         struct curl_slist *dav_headers = http_copy_default_headers();
 428
 429         slot = get_active_slot();
 430         slot->callback_func = process_response;
 431         slot->callback_data = request;
 432         curl_setup_http_get(slot->curl, request->url, DAV_MOVE);
 433         dav_headers = curl_slist_append(dav_headers, request->dest);
 434         dav_headers = curl_slist_append(dav_headers, "Overwrite: T");
 435         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 436
 437         if (start_active_slot(slot)) {
 438                 request->slot = slot;
 439                 request->state = RUN_MOVE;
 440                 request->headers = dav_headers;
 441         } else {
 442                 request->state = ABORTED;
 443                 FREE_AND_NULL(request->url);
 444                 curl_slist_free_all(dav_headers);
 445         }
 446 }
 447
 448 static int refresh_lock(struct remote_lock *lock)
 449 {
 450         struct active_request_slot *slot;
 451         struct slot_results results;
 452         struct curl_slist *dav_headers;
 453         int rc = 0;
 454
 455         lock->refreshing = 1;
 456
 457         dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT);
 458
 459         slot = get_active_slot();
 460         slot->results = &results;
 461         curl_setup_http_get(slot->curl, lock->url, DAV_LOCK);
 462         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 463
 464         if (start_active_slot(slot)) {
 465                 run_active_slot(slot);
 466                 if (results.curl_result != CURLE_OK) {
 467                         fprintf(stderr, "LOCK HTTP error %ld\n",
 468                                 results.http_code);
 469                 } else {
 470                         lock->start_time = time(NULL);
 471                         rc = 1;
 472                 }
 473         }
 474
 475         lock->refreshing = 0;
 476         curl_slist_free_all(dav_headers);
 477
 478         return rc;
 479 }
 480
 481 static void check_locks(void)
 482 {
 483         struct remote_lock *lock = repo->locks;
 484         time_t current_time = time(NULL);
 485         int time_remaining;
 486
 487         while (lock) {
 488                 time_remaining = lock->start_time + lock->timeout -
 489                         current_time;
 490                 if (!lock->refreshing && time_remaining < LOCK_REFRESH) {
 491                         if (!refresh_lock(lock)) {
 492                                 fprintf(stderr,
 493                                         "Unable to refresh lock for %s\n",
 494                                         lock->url);
 495                                 aborted = 1;
 496                                 return;
 497                         }
 498                 }
 499                 lock = lock->next;
 500         }
 501 }
 502
 503 static void release_request(struct transfer_request *request)
 504 {
 505         struct transfer_request *entry = request_queue_head;
 506
 507         if (request == request_queue_head) {
 508                 request_queue_head = request->next;
 509         } else {
 510                 while (entry && entry->next != request)
 511                         entry = entry->next;
 512                 if (entry)
 513                         entry->next = request->next;
 514         }
 515
 516         free(request->url);
 517         free(request->dest);
 518         strbuf_release(&request->buffer.buf);
 519         free(request);
 520 }
 521
 522 static void finish_request(struct transfer_request *request)
 523 {
 524         struct http_pack_request *preq;
 525         struct http_object_request *obj_req;
 526
 527         request->curl_result = request->slot->curl_result;
 528         request->http_code = request->slot->http_code;
 529         request->slot = NULL;
 530
 531         /* Keep locks active */
 532         check_locks();
 533
 534         if (request->headers)
 535                 curl_slist_free_all(request->headers);
 536
 537         /* URL is reused for MOVE after PUT and used during FETCH */
 538         if (request->state != RUN_PUT && request->state != RUN_FETCH_PACKED) {
 539                 FREE_AND_NULL(request->url);
 540         }
 541
 542         if (request->state == RUN_MKCOL) {
 543                 if (request->curl_result == CURLE_OK ||
 544                     request->http_code == 405) {
 545                         remote_dir_exists[request->obj->oid.hash[0]] = 1;
 546                         start_put(request);
 547                 } else {
 548                         fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n",
 549                                 oid_to_hex(&request->obj->oid),
 550                                 request->curl_result, request->http_code);
 551                         request->state = ABORTED;
 552                         aborted = 1;
 553                 }
 554         } else if (request->state == RUN_PUT) {
 555                 if (request->curl_result == CURLE_OK) {
 556                         start_move(request);
 557                 } else {
 558                         fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n",
 559                                 oid_to_hex(&request->obj->oid),
 560                                 request->curl_result, request->http_code);
 561                         request->state = ABORTED;
 562                         aborted = 1;
 563                 }
 564         } else if (request->state == RUN_MOVE) {
 565                 if (request->curl_result == CURLE_OK) {
 566                         if (push_verbosely)
 567                                 fprintf(stderr, "    sent %s\n",
 568                                         oid_to_hex(&request->obj->oid));
 569                         request->obj->flags |= REMOTE;
 570                         release_request(request);
 571                 } else {
 572                         fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n",
 573                                 oid_to_hex(&request->obj->oid),
 574                                 request->curl_result, request->http_code);
 575                         request->state = ABORTED;
 576                         aborted = 1;
 577                 }
 578         } else if (request->state == RUN_FETCH_LOOSE) {
 579                 obj_req = (struct http_object_request *)request->userData;
 580
 581                 if (finish_http_object_request(obj_req) == 0)
 582                         if (obj_req->rename == 0)
 583                                 request->obj->flags |= (LOCAL | REMOTE);
 584
 585                 release_http_object_request(&obj_req);
 586
 587                 /* Try fetching packed if necessary */
 588                 if (request->obj->flags & LOCAL) {
 589                         release_request(request);
 590                 } else
 591                         start_fetch_packed(request);
 592
 593         } else if (request->state == RUN_FETCH_PACKED) {
 594                 int fail = 1;
 595                 if (request->curl_result != CURLE_OK) {
 596                         fprintf(stderr, "Unable to get pack file %s\n%s",
 597                                 request->url, curl_errorstr);
 598                 } else {
 599                         preq = (struct http_pack_request *)request->userData;
 600
 601                         if (preq) {
 602                                 if (finish_http_pack_request(preq) == 0)
 603                                         fail = 0;
 604                                 release_http_pack_request(preq);
 605                         }
 606                 }
 607                 if (fail)
 608                         repo->can_update_info_refs = 0;
 609                 else
 610                         http_install_packfile(request->target, &repo->packs);
 611                 release_request(request);
 612         }
 613 }
 614
 615 static int is_running_queue;
 616 static int fill_active_slot(void *data UNUSED)
 617 {
 618         struct transfer_request *request;
 619
 620         if (aborted || !is_running_queue)
 621                 return 0;
 622
 623         for (request = request_queue_head; request; request = request->next) {
 624                 if (request->state == NEED_FETCH) {
 625                         start_fetch_loose(request);
 626                         return 1;
 627                 } else if (pushing && request->state == NEED_PUSH) {
 628                         if (remote_dir_exists[request->obj->oid.hash[0]] == 1) {
 629                                 start_put(request);
 630                         } else {
 631                                 start_mkcol(request);
 632                         }
 633                         return 1;
 634                 }
 635         }
 636         return 0;
 637 }
 638
 639 static void get_remote_object_list(unsigned char parent);
 640
 641 static void add_fetch_request(struct object *obj)
 642 {
 643         struct transfer_request *request;
 644
 645         check_locks();
 646
 647         /*
 648          * Don't fetch the object if it's known to exist locally
 649          * or is already in the request queue
 650          */
 651         if (remote_dir_exists[obj->oid.hash[0]] == -1)
 652                 get_remote_object_list(obj->oid.hash[0]);
 653         if (obj->flags & (LOCAL | FETCHING))
 654                 return;
 655
 656         obj->flags |= FETCHING;
 657         CALLOC_ARRAY(request, 1);
 658         request->obj = obj;
 659         request->state = NEED_FETCH;
 660         strbuf_init(&request->buffer.buf, 0);
 661         request->next = request_queue_head;
 662         request_queue_head = request;
 663
 664         fill_active_slots();
 665         step_active_slots();
 666 }
 667
 668 static int add_send_request(struct object *obj, struct remote_lock *lock)
 669 {
 670         struct transfer_request *request;
 671         struct packed_git *target;
 672
 673         /* Keep locks active */
 674         check_locks();
 675
 676         /*
 677          * Don't push the object if it's known to exist on the remote
 678          * or is already in the request queue
 679          */
 680         if (remote_dir_exists[obj->oid.hash[0]] == -1)
 681                 get_remote_object_list(obj->oid.hash[0]);
 682         if (obj->flags & (REMOTE | PUSHING))
 683                 return 0;
 684         target = find_oid_pack(&obj->oid, repo->packs);
 685         if (target) {
 686                 obj->flags |= REMOTE;
 687                 return 0;
 688         }
 689
 690         obj->flags |= PUSHING;
 691         CALLOC_ARRAY(request, 1);
 692         request->obj = obj;
 693         request->lock = lock;
 694         request->state = NEED_PUSH;
 695         strbuf_init(&request->buffer.buf, 0);
 696         request->next = request_queue_head;
 697         request_queue_head = request;
 698
 699         fill_active_slots();
 700         step_active_slots();
 701
 702         return 1;
 703 }
 704
 705 static int fetch_indices(void)
 706 {
 707         int ret;
 708
 709         if (push_verbosely)
 710                 fprintf(stderr, "Getting pack list\n");
 711
 712         switch (http_get_info_packs(repo->url, &repo->packs)) {
 713         case HTTP_OK:
 714         case HTTP_MISSING_TARGET:
 715                 ret = 0;
 716                 break;
 717         default:
 718                 ret = -1;
 719         }
 720
 721         return ret;
 722 }
 723
 724 static void one_remote_object(const struct object_id *oid)
 725 {
 726         struct object *obj;
 727
 728         obj = lookup_object(the_repository, oid);
 729         if (!obj)
 730                 obj = parse_object(the_repository, oid);
 731
 732         /* Ignore remote objects that don't exist locally */
 733         if (!obj)
 734                 return;
 735
 736         obj->flags |= REMOTE;
 737         if (!object_list_contains(objects, obj))
 738                 object_list_insert(obj, &objects);
 739 }
 740
 741 static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed)
 742 {
 743         int *lock_flags = (int *)ctx->userData;
 744
 745         if (tag_closed) {
 746                 if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) {
 747                         if ((*lock_flags & DAV_PROP_LOCKEX) &&
 748                             (*lock_flags & DAV_PROP_LOCKWR)) {
 749                                 *lock_flags |= DAV_LOCK_OK;
 750                         }
 751                         *lock_flags &= DAV_LOCK_OK;
 752                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) {
 753                         *lock_flags |= DAV_PROP_LOCKWR;
 754                 } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) {
 755                         *lock_flags |= DAV_PROP_LOCKEX;
 756                 }
 757         }
 758 }
 759
 760 static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed)
 761 {
 762         struct remote_lock *lock = (struct remote_lock *)ctx->userData;
 763         git_hash_ctx hash_ctx;
 764         unsigned char lock_token_hash[GIT_MAX_RAWSZ];
 765
 766         if (tag_closed && ctx->cdata) {
 767                 if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) {
 768                         lock->owner = xstrdup(ctx->cdata);
 769                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) {
 770                         const char *arg;
 771                         if (skip_prefix(ctx->cdata, "Second-", &arg))
 772                                 lock->timeout = strtol(arg, NULL, 10);
 773                 } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) {
 774                         lock->token = xstrdup(ctx->cdata);
 775
 776                         the_hash_algo->init_fn(&hash_ctx);
 777                         the_hash_algo->update_fn(&hash_ctx, lock->token, strlen(lock->token));
 778                         the_hash_algo->final_fn(lock_token_hash, &hash_ctx);
 779
 780                         lock->tmpfile_suffix[0] = '_';
 781                         memcpy(lock->tmpfile_suffix + 1, hash_to_hex(lock_token_hash), the_hash_algo->hexsz);
 782                 }
 783         }
 784 }
 785
 786 static void one_remote_ref(const char *refname);
 787
 788 static void
 789 xml_start_tag(void *userData, const char *name, const char **atts UNUSED)
 790 {
 791         struct xml_ctx *ctx = (struct xml_ctx *)userData;
 792         const char *c = strchr(name, ':');
 793         int old_namelen, new_len;
 794
 795         if (!c)
 796                 c = name;
 797         else
 798                 c++;
 799
 800         old_namelen = strlen(ctx->name);
 801         new_len = old_namelen + strlen(c) + 2;
 802
 803         if (new_len > ctx->len) {
 804                 ctx->name = xrealloc(ctx->name, new_len);
 805                 ctx->len = new_len;
 806         }
 807         xsnprintf(ctx->name + old_namelen, ctx->len - old_namelen, ".%s", c);
 808
 809         FREE_AND_NULL(ctx->cdata);
 810
 811         ctx->userFunc(ctx, 0);
 812 }
 813
 814 static void
 815 xml_end_tag(void *userData, const char *name)
 816 {
 817         struct xml_ctx *ctx = (struct xml_ctx *)userData;
 818         const char *c = strchr(name, ':');
 819         char *ep;
 820
 821         ctx->userFunc(ctx, 1);
 822
 823         if (!c)
 824                 c = name;
 825         else
 826                 c++;
 827
 828         ep = ctx->name + strlen(ctx->name) - strlen(c) - 1;
 829         *ep = 0;
 830 }
 831
 832 static void
 833 xml_cdata(void *userData, const XML_Char *s, int len)
 834 {
 835         struct xml_ctx *ctx = (struct xml_ctx *)userData;
 836         free(ctx->cdata);
 837         ctx->cdata = xmemdupz(s, len);
 838 }
 839
 840 static struct remote_lock *lock_remote(const char *path, long timeout)
 841 {
 842         struct active_request_slot *slot;
 843         struct slot_results results;
 844         struct buffer out_buffer = { STRBUF_INIT, 0 };
 845         struct strbuf in_buffer = STRBUF_INIT;
 846         char *url;
 847         char *ep;
 848         char timeout_header[25];
 849         struct remote_lock *lock = NULL;
 850         struct curl_slist *dav_headers = http_copy_default_headers();
 851         struct xml_ctx ctx;
 852         char *escaped;
 853
 854         url = xstrfmt("%s%s", repo->url, path);
 855
 856         /* Make sure leading directories exist for the remote ref */
 857         ep = strchr(url + strlen(repo->url) + 1, '/');
 858         while (ep) {
 859                 char saved_character = ep[1];
 860                 ep[1] = '\0';
 861                 slot = get_active_slot();
 862                 slot->results = &results;
 863                 curl_setup_http_get(slot->curl, url, DAV_MKCOL);
 864                 if (start_active_slot(slot)) {
 865                         run_active_slot(slot);
 866                         if (results.curl_result != CURLE_OK &&
 867                             results.http_code != 405) {
 868                                 fprintf(stderr,
 869                                         "Unable to create branch path %s\n",
 870                                         url);
 871                                 free(url);
 872                                 return NULL;
 873                         }
 874                 } else {
 875                         fprintf(stderr, "Unable to start MKCOL request\n");
 876                         free(url);
 877                         return NULL;
 878                 }
 879                 ep[1] = saved_character;
 880                 ep = strchr(ep + 1, '/');
 881         }
 882
 883         escaped = xml_entities(ident_default_email());
 884         strbuf_addf(&out_buffer.buf, LOCK_REQUEST, escaped);
 885         free(escaped);
 886
 887         xsnprintf(timeout_header, sizeof(timeout_header), "Timeout: Second-%ld", timeout);
 888         dav_headers = curl_slist_append(dav_headers, timeout_header);
 889         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
 890
 891         slot = get_active_slot();
 892         slot->results = &results;
 893         curl_setup_http(slot->curl, url, DAV_LOCK, &out_buffer, fwrite_buffer);
 894         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 895         curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
 896
 897         CALLOC_ARRAY(lock, 1);
 898         lock->timeout = -1;
 899
 900         if (start_active_slot(slot)) {
 901                 run_active_slot(slot);
 902                 if (results.curl_result == CURLE_OK) {
 903                         XML_Parser parser = XML_ParserCreate(NULL);
 904                         enum XML_Status result;
 905                         ctx.name = xcalloc(10, 1);
 906                         ctx.len = 0;
 907                         ctx.cdata = NULL;
 908                         ctx.userFunc = handle_new_lock_ctx;
 909                         ctx.userData = lock;
 910                         XML_SetUserData(parser, &ctx);
 911                         XML_SetElementHandler(parser, xml_start_tag,
 912                                               xml_end_tag);
 913                         XML_SetCharacterDataHandler(parser, xml_cdata);
 914                         result = XML_Parse(parser, in_buffer.buf,
 915                                            in_buffer.len, 1);
 916                         free(ctx.name);
 917                         free(ctx.cdata);
 918                         if (result != XML_STATUS_OK) {
 919                                 fprintf(stderr, "XML error: %s\n",
 920                                         XML_ErrorString(
 921                                                 XML_GetErrorCode(parser)));
 922                                 lock->timeout = -1;
 923                         }
 924                         XML_ParserFree(parser);
 925                 } else {
 926                         fprintf(stderr,
 927                                 "error: curl result=%d, HTTP code=%ld\n",
 928                                 results.curl_result, results.http_code);
 929                 }
 930         } else {
 931                 fprintf(stderr, "Unable to start LOCK request\n");
 932         }
 933
 934         curl_slist_free_all(dav_headers);
 935         strbuf_release(&out_buffer.buf);
 936         strbuf_release(&in_buffer);
 937
 938         if (lock->token == NULL || lock->timeout <= 0) {
 939                 free(lock->token);
 940                 free(lock->owner);
 941                 free(url);
 942                 FREE_AND_NULL(lock);
 943         } else {
 944                 lock->url = url;
 945                 lock->start_time = time(NULL);
 946                 lock->next = repo->locks;
 947                 repo->locks = lock;
 948         }
 949
 950         return lock;
 951 }
 952
 953 static int unlock_remote(struct remote_lock *lock)
 954 {
 955         struct active_request_slot *slot;
 956         struct slot_results results;
 957         struct remote_lock *prev = repo->locks;
 958         struct curl_slist *dav_headers;
 959         int rc = 0;
 960
 961         dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK);
 962
 963         slot = get_active_slot();
 964         slot->results = &results;
 965         curl_setup_http_get(slot->curl, lock->url, DAV_UNLOCK);
 966         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
 967
 968         if (start_active_slot(slot)) {
 969                 run_active_slot(slot);
 970                 if (results.curl_result == CURLE_OK)
 971                         rc = 1;
 972                 else
 973                         fprintf(stderr, "UNLOCK HTTP error %ld\n",
 974                                 results.http_code);
 975         } else {
 976                 fprintf(stderr, "Unable to start UNLOCK request\n");
 977         }
 978
 979         curl_slist_free_all(dav_headers);
 980
 981         if (repo->locks == lock) {
 982                 repo->locks = lock->next;
 983         } else {
 984                 while (prev && prev->next != lock)
 985                         prev = prev->next;
 986                 if (prev)
 987                         prev->next = lock->next;
 988         }
 989
 990         free(lock->owner);
 991         free(lock->url);
 992         free(lock->token);
 993         free(lock);
 994
 995         return rc;
 996 }
 997
 998 static void remove_locks(void)
 999 {
1000         struct remote_lock *lock = repo->locks;
1001
1002         fprintf(stderr, "Removing remote locks...\n");
1003         while (lock) {
1004                 struct remote_lock *next = lock->next;
1005                 unlock_remote(lock);
1006                 lock = next;
1007         }
1008 }
1009
1010 static void remove_locks_on_signal(int signo)
1011 {
1012         remove_locks();
1013         sigchain_pop(signo);
1014         raise(signo);
1015 }
1016
1017 static void remote_ls(const char *path, int flags,
1018                       void (*userFunc)(struct remote_ls_ctx *ls),
1019                       void *userData);
1020
1021 /* extract hex from sharded "xx/x{38}" filename */
1022 static int get_oid_hex_from_objpath(const char *path, struct object_id *oid)
1023 {
1024         memset(oid->hash, 0, GIT_MAX_RAWSZ);
1025         oid->algo = hash_algo_by_ptr(the_hash_algo);
1026
1027         if (strlen(path) != the_hash_algo->hexsz + 1)
1028                 return -1;
1029
1030         if (hex_to_bytes(oid->hash, path, 1))
1031                 return -1;
1032         path += 2;
1033         path++; /* skip '/' */
1034
1035         return hex_to_bytes(oid->hash + 1, path, the_hash_algo->rawsz - 1);
1036 }
1037
1038 static void process_ls_object(struct remote_ls_ctx *ls)
1039 {
1040         unsigned int *parent = (unsigned int *)ls->userData;
1041         const char *path = ls->dentry_name;
1042         struct object_id oid;
1043
1044         if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) {
1045                 remote_dir_exists[*parent] = 1;
1046                 return;
1047         }
1048
1049         if (!skip_prefix(path, "objects/", &path) ||
1050             get_oid_hex_from_objpath(path, &oid))
1051                 return;
1052
1053         one_remote_object(&oid);
1054 }
1055
1056 static void process_ls_ref(struct remote_ls_ctx *ls)
1057 {
1058         if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) {
1059                 fprintf(stderr, "  %s\n", ls->dentry_name);
1060                 return;
1061         }
1062
1063         if (!(ls->dentry_flags & IS_DIR))
1064                 one_remote_ref(ls->dentry_name);
1065 }
1066
1067 static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed)
1068 {
1069         struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData;
1070
1071         if (tag_closed) {
1072                 if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) {
1073                         if (ls->dentry_flags & IS_DIR) {
1074
1075                                 /* ensure collection names end with slash */
1076                                 str_end_url_with_slash(ls->dentry_name, &ls->dentry_name);
1077
1078                                 if (ls->flags & PROCESS_DIRS) {
1079                                         ls->userFunc(ls);
1080                                 }
1081                                 if (strcmp(ls->dentry_name, ls->path) &&
1082                                     ls->flags & RECURSIVE) {
1083                                         remote_ls(ls->dentry_name,
1084                                                   ls->flags,
1085                                                   ls->userFunc,
1086                                                   ls->userData);
1087                                 }
1088                         } else if (ls->flags & PROCESS_FILES) {
1089                                 ls->userFunc(ls);
1090                         }
1091                 } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) {
1092                         char *path = ctx->cdata;
1093                         if (*ctx->cdata == 'h') {
1094                                 path = strstr(path, "//");
1095                                 if (path) {
1096                                         path = strchr(path+2, '/');
1097                                 }
1098                         }
1099                         if (path) {
1100                                 const char *url = repo->url;
1101                                 if (repo->path)
1102                                         url = repo->path;
1103                                 if (strncmp(path, url, repo->path_len))
1104                                         error("Parsed path '%s' does not match url: '%s'",
1105                                               path, url);
1106                                 else {
1107                                         path += repo->path_len;
1108                                         ls->dentry_name = xstrdup(path);
1109                                 }
1110                         }
1111                 } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) {
1112                         ls->dentry_flags |= IS_DIR;
1113                 }
1114         } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) {
1115                 FREE_AND_NULL(ls->dentry_name);
1116                 ls->dentry_flags = 0;
1117         }
1118 }
1119
1120 /*
1121  * NEEDSWORK: remote_ls() ignores info/refs on the remote side.  But it
1122  * should _only_ heed the information from that file, instead of trying to
1123  * determine the refs from the remote file system (badly: it does not even
1124  * know about packed-refs).
1125  */
1126 static void remote_ls(const char *path, int flags,
1127                       void (*userFunc)(struct remote_ls_ctx *ls),
1128                       void *userData)
1129 {
1130         char *url = xstrfmt("%s%s", repo->url, path);
1131         struct active_request_slot *slot;
1132         struct slot_results results;
1133         struct strbuf in_buffer = STRBUF_INIT;
1134         struct buffer out_buffer = { STRBUF_INIT, 0 };
1135         struct curl_slist *dav_headers = http_copy_default_headers();
1136         struct xml_ctx ctx;
1137         struct remote_ls_ctx ls;
1138
1139         ls.flags = flags;
1140         ls.path = xstrdup(path);
1141         ls.dentry_name = NULL;
1142         ls.dentry_flags = 0;
1143         ls.userData = userData;
1144         ls.userFunc = userFunc;
1145
1146         strbuf_addstr(&out_buffer.buf, PROPFIND_ALL_REQUEST);
1147
1148         dav_headers = curl_slist_append(dav_headers, "Depth: 1");
1149         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1150
1151         slot = get_active_slot();
1152         slot->results = &results;
1153         curl_setup_http(slot->curl, url, DAV_PROPFIND,
1154                         &out_buffer, fwrite_buffer);
1155         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1156         curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1157
1158         if (start_active_slot(slot)) {
1159                 run_active_slot(slot);
1160                 if (results.curl_result == CURLE_OK) {
1161                         XML_Parser parser = XML_ParserCreate(NULL);
1162                         enum XML_Status result;
1163                         ctx.name = xcalloc(10, 1);
1164                         ctx.len = 0;
1165                         ctx.cdata = NULL;
1166                         ctx.userFunc = handle_remote_ls_ctx;
1167                         ctx.userData = &ls;
1168                         XML_SetUserData(parser, &ctx);
1169                         XML_SetElementHandler(parser, xml_start_tag,
1170                                               xml_end_tag);
1171                         XML_SetCharacterDataHandler(parser, xml_cdata);
1172                         result = XML_Parse(parser, in_buffer.buf,
1173                                            in_buffer.len, 1);
1174                         free(ctx.name);
1175                         free(ctx.cdata);
1176
1177                         if (result != XML_STATUS_OK) {
1178                                 fprintf(stderr, "XML error: %s\n",
1179                                         XML_ErrorString(
1180                                                 XML_GetErrorCode(parser)));
1181                         }
1182                         XML_ParserFree(parser);
1183                 }
1184         } else {
1185                 fprintf(stderr, "Unable to start PROPFIND request\n");
1186         }
1187
1188         free(ls.path);
1189         free(ls.dentry_name);
1190         free(url);
1191         strbuf_release(&out_buffer.buf);
1192         strbuf_release(&in_buffer);
1193         curl_slist_free_all(dav_headers);
1194 }
1195
1196 static void get_remote_object_list(unsigned char parent)
1197 {
1198         char path[] = "objects/XX/";
1199         static const char hex[] = "0123456789abcdef";
1200         unsigned int val = parent;
1201
1202         path[8] = hex[val >> 4];
1203         path[9] = hex[val & 0xf];
1204         remote_dir_exists[val] = 0;
1205         remote_ls(path, (PROCESS_FILES | PROCESS_DIRS),
1206                   process_ls_object, &val);
1207 }
1208
1209 static int locking_available(void)
1210 {
1211         struct active_request_slot *slot;
1212         struct slot_results results;
1213         struct strbuf in_buffer = STRBUF_INIT;
1214         struct buffer out_buffer = { STRBUF_INIT, 0 };
1215         struct curl_slist *dav_headers = http_copy_default_headers();
1216         struct xml_ctx ctx;
1217         int lock_flags = 0;
1218         char *escaped;
1219
1220         escaped = xml_entities(repo->url);
1221         strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, escaped);
1222         free(escaped);
1223
1224         dav_headers = curl_slist_append(dav_headers, "Depth: 0");
1225         dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml");
1226
1227         slot = get_active_slot();
1228         slot->results = &results;
1229         curl_setup_http(slot->curl, repo->url, DAV_PROPFIND,
1230                         &out_buffer, fwrite_buffer);
1231         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1232         curl_easy_setopt(slot->curl, CURLOPT_WRITEDATA, &in_buffer);
1233
1234         if (start_active_slot(slot)) {
1235                 run_active_slot(slot);
1236                 if (results.curl_result == CURLE_OK) {
1237                         XML_Parser parser = XML_ParserCreate(NULL);
1238                         enum XML_Status result;
1239                         ctx.name = xcalloc(10, 1);
1240                         ctx.len = 0;
1241                         ctx.cdata = NULL;
1242                         ctx.userFunc = handle_lockprop_ctx;
1243                         ctx.userData = &lock_flags;
1244                         XML_SetUserData(parser, &ctx);
1245                         XML_SetElementHandler(parser, xml_start_tag,
1246                                               xml_end_tag);
1247                         result = XML_Parse(parser, in_buffer.buf,
1248                                            in_buffer.len, 1);
1249                         free(ctx.name);
1250
1251                         if (result != XML_STATUS_OK) {
1252                                 fprintf(stderr, "XML error: %s\n",
1253                                         XML_ErrorString(
1254                                                 XML_GetErrorCode(parser)));
1255                                 lock_flags = 0;
1256                         }
1257                         XML_ParserFree(parser);
1258                         if (!lock_flags)
1259                                 error("no DAV locking support on %s",
1260                                       repo->url);
1261
1262                 } else {
1263                         error("Cannot access URL %s, return code %d",
1264                               repo->url, results.curl_result);
1265                         lock_flags = 0;
1266                 }
1267         } else {
1268                 error("Unable to start PROPFIND request on %s", repo->url);
1269         }
1270
1271         strbuf_release(&out_buffer.buf);
1272         strbuf_release(&in_buffer);
1273         curl_slist_free_all(dav_headers);
1274
1275         return lock_flags;
1276 }
1277
1278 static struct object_list **add_one_object(struct object *obj, struct object_list **p)
1279 {
1280         struct object_list *entry = xmalloc(sizeof(struct object_list));
1281         entry->item = obj;
1282         entry->next = *p;
1283         *p = entry;
1284         return &entry->next;
1285 }
1286
1287 static struct object_list **process_blob(struct blob *blob,
1288                                          struct object_list **p)
1289 {
1290         struct object *obj = &blob->object;
1291
1292         obj->flags |= LOCAL;
1293
1294         if (obj->flags & (UNINTERESTING | SEEN))
1295                 return p;
1296
1297         obj->flags |= SEEN;
1298         return add_one_object(obj, p);
1299 }
1300
1301 static struct object_list **process_tree(struct tree *tree,
1302                                          struct object_list **p)
1303 {
1304         struct object *obj = &tree->object;
1305         struct tree_desc desc;
1306         struct name_entry entry;
1307
1308         obj->flags |= LOCAL;
1309
1310         if (obj->flags & (UNINTERESTING | SEEN))
1311                 return p;
1312         if (parse_tree(tree) < 0)
1313                 die("bad tree object %s", oid_to_hex(&obj->oid));
1314
1315         obj->flags |= SEEN;
1316         p = add_one_object(obj, p);
1317
1318         init_tree_desc(&desc, &tree->object.oid, tree->buffer, tree->size);
1319
1320         while (tree_entry(&desc, &entry))
1321                 switch (object_type(entry.mode)) {
1322                 case OBJ_TREE:
1323                         p = process_tree(lookup_tree(the_repository, &entry.oid),
1324                                          p);
1325                         break;
1326                 case OBJ_BLOB:
1327                         p = process_blob(lookup_blob(the_repository, &entry.oid),
1328                                          p);
1329                         break;
1330                 default:
1331                         /* Subproject commit - not in this repository */
1332                         break;
1333                 }
1334
1335         free_tree_buffer(tree);
1336         return p;
1337 }
1338
1339 static int get_delta(struct rev_info *revs, struct remote_lock *lock)
1340 {
1341         struct commit *commit;
1342         struct object_list **p = &objects;
1343         int count = 0;
1344
1345         while ((commit = get_revision(revs)) != NULL) {
1346                 p = process_tree(repo_get_commit_tree(the_repository, commit),
1347                                  p);
1348                 commit->object.flags |= LOCAL;
1349                 if (!(commit->object.flags & UNINTERESTING))
1350                         count += add_send_request(&commit->object, lock);
1351         }
1352
1353         for (size_t i = 0; i < revs->pending.nr; i++) {
1354                 struct object_array_entry *entry = revs->pending.objects + i;
1355                 struct object *obj = entry->item;
1356                 const char *name = entry->name;
1357
1358                 if (obj->flags & (UNINTERESTING | SEEN))
1359                         continue;
1360                 if (obj->type == OBJ_TAG) {
1361                         obj->flags |= SEEN;
1362                         p = add_one_object(obj, p);
1363                         continue;
1364                 }
1365                 if (obj->type == OBJ_TREE) {
1366                         p = process_tree((struct tree *)obj, p);
1367                         continue;
1368                 }
1369                 if (obj->type == OBJ_BLOB) {
1370                         p = process_blob((struct blob *)obj, p);
1371                         continue;
1372                 }
1373                 die("unknown pending object %s (%s)", oid_to_hex(&obj->oid), name);
1374         }
1375
1376         while (objects) {
1377                 struct object_list *next = objects->next;
1378
1379                 if (!(objects->item->flags & UNINTERESTING))
1380                         count += add_send_request(objects->item, lock);
1381
1382                 free(objects);
1383                 objects = next;
1384         }
1385
1386         return count;
1387 }
1388
1389 static int update_remote(const struct object_id *oid, struct remote_lock *lock)
1390 {
1391         struct active_request_slot *slot;
1392         struct slot_results results;
1393         struct buffer out_buffer = { STRBUF_INIT, 0 };
1394         struct curl_slist *dav_headers;
1395
1396         dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1397
1398         strbuf_addf(&out_buffer.buf, "%s\n", oid_to_hex(oid));
1399
1400         slot = get_active_slot();
1401         slot->results = &results;
1402         curl_setup_http(slot->curl, lock->url, DAV_PUT,
1403                         &out_buffer, fwrite_null);
1404         curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1405
1406         if (start_active_slot(slot)) {
1407                 run_active_slot(slot);
1408                 strbuf_release(&out_buffer.buf);
1409                 curl_slist_free_all(dav_headers);
1410                 if (results.curl_result != CURLE_OK) {
1411                         fprintf(stderr,
1412                                 "PUT error: curl result=%d, HTTP code=%ld\n",
1413                                 results.curl_result, results.http_code);
1414                         /* We should attempt recovery? */
1415                         return 0;
1416                 }
1417         } else {
1418                 strbuf_release(&out_buffer.buf);
1419                 curl_slist_free_all(dav_headers);
1420                 fprintf(stderr, "Unable to start PUT request\n");
1421                 return 0;
1422         }
1423
1424         return 1;
1425 }
1426
1427 static struct ref *remote_refs;
1428
1429 static void one_remote_ref(const char *refname)
1430 {
1431         struct ref *ref;
1432         struct object *obj;
1433
1434         ref = alloc_ref(refname);
1435
1436         if (http_fetch_ref(repo->url, ref) != 0) {
1437                 fprintf(stderr,
1438                         "Unable to fetch ref %s from %s\n",
1439                         refname, repo->url);
1440                 free(ref);
1441                 return;
1442         }
1443
1444         /*
1445          * Fetch a copy of the object if it doesn't exist locally - it
1446          * may be required for updating server info later.
1447          */
1448         if (repo->can_update_info_refs && !repo_has_object_file(the_repository, &ref->old_oid)) {
1449                 obj = lookup_unknown_object(the_repository, &ref->old_oid);
1450                 fprintf(stderr, "  fetch %s for %s\n",
1451                         oid_to_hex(&ref->old_oid), refname);
1452                 add_fetch_request(obj);
1453         }
1454
1455         ref->next = remote_refs;
1456         remote_refs = ref;
1457 }
1458
1459 static void get_dav_remote_heads(void)
1460 {
1461         remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL);
1462 }
1463
1464 static void add_remote_info_ref(struct remote_ls_ctx *ls)
1465 {
1466         struct strbuf *buf = (struct strbuf *)ls->userData;
1467         struct object *o;
1468         struct ref *ref;
1469
1470         ref = alloc_ref(ls->dentry_name);
1471
1472         if (http_fetch_ref(repo->url, ref) != 0) {
1473                 fprintf(stderr,
1474                         "Unable to fetch ref %s from %s\n",
1475                         ls->dentry_name, repo->url);
1476                 aborted = 1;
1477                 free(ref);
1478                 return;
1479         }
1480
1481         o = parse_object(the_repository, &ref->old_oid);
1482         if (!o) {
1483                 fprintf(stderr,
1484                         "Unable to parse object %s for remote ref %s\n",
1485                         oid_to_hex(&ref->old_oid), ls->dentry_name);
1486                 aborted = 1;
1487                 free(ref);
1488                 return;
1489         }
1490
1491         strbuf_addf(buf, "%s\t%s\n",
1492                     oid_to_hex(&ref->old_oid), ls->dentry_name);
1493
1494         if (o->type == OBJ_TAG) {
1495                 o = deref_tag(the_repository, o, ls->dentry_name, 0);
1496                 if (o)
1497                         strbuf_addf(buf, "%s\t%s^{}\n",
1498                                     oid_to_hex(&o->oid), ls->dentry_name);
1499         }
1500         free(ref);
1501 }
1502
1503 static void update_remote_info_refs(struct remote_lock *lock)
1504 {
1505         struct buffer buffer = { STRBUF_INIT, 0 };
1506         struct active_request_slot *slot;
1507         struct slot_results results;
1508         struct curl_slist *dav_headers;
1509
1510         remote_ls("refs/", (PROCESS_FILES | RECURSIVE),
1511                   add_remote_info_ref, &buffer.buf);
1512         if (!aborted) {
1513                 dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF);
1514
1515                 slot = get_active_slot();
1516                 slot->results = &results;
1517                 curl_setup_http(slot->curl, lock->url, DAV_PUT,
1518                                 &buffer, fwrite_null);
1519                 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers);
1520
1521                 if (start_active_slot(slot)) {
1522                         run_active_slot(slot);
1523                         if (results.curl_result != CURLE_OK) {
1524                                 fprintf(stderr,
1525                                         "PUT error: curl result=%d, HTTP code=%ld\n",
1526                                         results.curl_result, results.http_code);
1527                         }
1528                 }
1529                 curl_slist_free_all(dav_headers);
1530         }
1531         strbuf_release(&buffer.buf);
1532 }
1533
1534 static int remote_exists(const char *path)
1535 {
1536         char *url = xstrfmt("%s%s", repo->url, path);
1537         int ret;
1538
1539
1540         switch (http_get_strbuf(url, NULL, NULL)) {
1541         case HTTP_OK:
1542                 ret = 1;
1543                 break;
1544         case HTTP_MISSING_TARGET:
1545                 ret = 0;
1546                 break;
1547         case HTTP_ERROR:
1548                 error("unable to access '%s': %s", url, curl_errorstr);
1549                 /* fallthrough */
1550         default:
1551                 ret = -1;
1552         }
1553         free(url);
1554         return ret;
1555 }
1556
1557 static void fetch_symref(const char *path, char **symref, struct object_id *oid)
1558 {
1559         char *url = xstrfmt("%s%s", repo->url, path);
1560         struct strbuf buffer = STRBUF_INIT;
1561         const char *name;
1562
1563         if (http_get_strbuf(url, &buffer, NULL) != HTTP_OK)
1564                 die("Couldn't get %s for remote symref\n%s", url,
1565                     curl_errorstr);
1566         free(url);
1567
1568         FREE_AND_NULL(*symref);
1569         oidclr(oid, the_repository->hash_algo);
1570
1571         if (buffer.len == 0)
1572                 return;
1573
1574         /* Cut off trailing newline. */
1575         strbuf_rtrim(&buffer);
1576
1577         /* If it's a symref, set the refname; otherwise try for a sha1 */
1578         if (skip_prefix(buffer.buf, "ref: ", &name)) {
1579                 *symref = xmemdupz(name, buffer.len - (name - buffer.buf));
1580         } else {
1581                 get_oid_hex(buffer.buf, oid);
1582         }
1583
1584         strbuf_release(&buffer);
1585 }
1586
1587 static int verify_merge_base(struct object_id *head_oid, struct ref *remote)
1588 {
1589         struct commit *head = lookup_commit_or_die(head_oid, "HEAD");
1590         struct commit *branch = lookup_commit_or_die(&remote->old_oid,
1591                                                      remote->name);
1592         int ret = repo_in_merge_bases(the_repository, branch, head);
1593
1594         if (ret < 0)
1595                 exit(128);
1596         return ret;
1597 }
1598
1599 static int delete_remote_branch(const char *pattern, int force)
1600 {
1601         struct ref *refs = remote_refs;
1602         struct ref *remote_ref = NULL;
1603         struct object_id head_oid;
1604         char *symref = NULL;
1605         int match;
1606         int patlen = strlen(pattern);
1607         int i;
1608         struct active_request_slot *slot;
1609         struct slot_results results;
1610         char *url;
1611
1612         /* Find the remote branch(es) matching the specified branch name */
1613         for (match = 0; refs; refs = refs->next) {
1614                 char *name = refs->name;
1615                 int namelen = strlen(name);
1616                 if (namelen < patlen ||
1617                     memcmp(name + namelen - patlen, pattern, patlen))
1618                         continue;
1619                 if (namelen != patlen && name[namelen - patlen - 1] != '/')
1620                         continue;
1621                 match++;
1622                 remote_ref = refs;
1623         }
1624         if (match == 0)
1625                 return error("No remote branch matches %s", pattern);
1626         if (match != 1)
1627                 return error("More than one remote branch matches %s",
1628                              pattern);
1629
1630         /*
1631          * Remote HEAD must be a symref (not exactly foolproof; a remote
1632          * symlink to a symref will look like a symref)
1633          */
1634         fetch_symref("HEAD", &symref, &head_oid);
1635         if (!symref)
1636                 return error("Remote HEAD is not a symref");
1637
1638         /* Remote branch must not be the remote HEAD */
1639         for (i = 0; symref && i < MAXDEPTH; i++) {
1640                 if (!strcmp(remote_ref->name, symref))
1641                         return error("Remote branch %s is the current HEAD",
1642                                      remote_ref->name);
1643                 fetch_symref(symref, &symref, &head_oid);
1644         }
1645
1646         /* Run extra sanity checks if delete is not forced */
1647         if (!force) {
1648                 /* Remote HEAD must resolve to a known object */
1649                 if (symref)
1650                         return error("Remote HEAD symrefs too deep");
1651                 if (is_null_oid(&head_oid))
1652                         return error("Unable to resolve remote HEAD");
1653                 if (!repo_has_object_file(the_repository, &head_oid))
1654                         return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", oid_to_hex(&head_oid));
1655
1656                 /* Remote branch must resolve to a known object */
1657                 if (is_null_oid(&remote_ref->old_oid))
1658                         return error("Unable to resolve remote branch %s",
1659                                      remote_ref->name);
1660                 if (!repo_has_object_file(the_repository, &remote_ref->old_oid))
1661                         return error("Remote branch %s resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", remote_ref->name, oid_to_hex(&remote_ref->old_oid));
1662
1663                 /* Remote branch must be an ancestor of remote HEAD */
1664                 if (!verify_merge_base(&head_oid, remote_ref)) {
1665                         return error("The branch '%s' is not an ancestor "
1666                                      "of your current HEAD.\n"
1667                                      "If you are sure you want to delete it,"
1668                                      " run:\n\t'git http-push -D %s %s'",
1669                                      remote_ref->name, repo->url, pattern);
1670                 }
1671         }
1672
1673         /* Send delete request */
1674         fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name);
1675         if (dry_run)
1676                 return 0;
1677         url = xstrfmt("%s%s", repo->url, remote_ref->name);
1678         slot = get_active_slot();
1679         slot->results = &results;
1680         curl_setup_http_get(slot->curl, url, DAV_DELETE);
1681         if (start_active_slot(slot)) {
1682                 run_active_slot(slot);
1683                 free(url);
1684                 if (results.curl_result != CURLE_OK)
1685                         return error("DELETE request failed (%d/%ld)",
1686                                      results.curl_result, results.http_code);
1687         } else {
1688                 free(url);
1689                 return error("Unable to start DELETE request");
1690         }
1691
1692         return 0;
1693 }
1694
1695 static void run_request_queue(void)
1696 {
1697         is_running_queue = 1;
1698         fill_active_slots();
1699         add_fill_function(NULL, fill_active_slot);
1700         do {
1701                 finish_all_active_slots();
1702                 fill_active_slots();
1703         } while (request_queue_head && !aborted);
1704
1705         is_running_queue = 0;
1706 }
1707
1708 int cmd_main(int argc, const char **argv)
1709 {
1710         struct transfer_request *request;
1711         struct transfer_request *next_request;
1712         struct refspec rs = REFSPEC_INIT_PUSH;
1713         struct remote_lock *ref_lock = NULL;
1714         struct remote_lock *info_ref_lock = NULL;
1715         int delete_branch = 0;
1716         int force_delete = 0;
1717         int objects_to_send;
1718         int rc = 0;
1719         int i;
1720         int new_refs;
1721         struct ref *ref, *local_refs = NULL;
1722
1723         CALLOC_ARRAY(repo, 1);
1724
1725         argv++;
1726         for (i = 1; i < argc; i++, argv++) {
1727                 const char *arg = *argv;
1728
1729                 if (*arg == '-') {
1730                         if (!strcmp(arg, "--all")) {
1731                                 push_all = MATCH_REFS_ALL;
1732                                 continue;
1733                         }
1734                         if (!strcmp(arg, "--force")) {
1735                                 force_all = 1;
1736                                 continue;
1737                         }
1738                         if (!strcmp(arg, "--dry-run")) {
1739                                 dry_run = 1;
1740                                 continue;
1741                         }
1742                         if (!strcmp(arg, "--helper-status")) {
1743                                 helper_status = 1;
1744                                 continue;
1745                         }
1746                         if (!strcmp(arg, "--verbose")) {
1747                                 push_verbosely = 1;
1748                                 http_is_verbose = 1;
1749                                 continue;
1750                         }
1751                         if (!strcmp(arg, "-d")) {
1752                                 delete_branch = 1;
1753                                 continue;
1754                         }
1755                         if (!strcmp(arg, "-D")) {
1756                                 delete_branch = 1;
1757                                 force_delete = 1;
1758                                 continue;
1759                         }
1760                         if (!strcmp(arg, "-h"))
1761                                 usage(http_push_usage);
1762                 }
1763                 if (!repo->url) {
1764                         char *path = strstr(arg, "//");
1765                         str_end_url_with_slash(arg, &repo->url);
1766                         repo->path_len = strlen(repo->url);
1767                         if (path) {
1768                                 repo->path = strchr(path+2, '/');
1769                                 if (repo->path)
1770                                         repo->path_len = strlen(repo->path);
1771                         }
1772                         continue;
1773                 }
1774                 refspec_appendn(&rs, argv, argc - i);
1775                 break;
1776         }
1777
1778         if (!repo->url)
1779                 usage(http_push_usage);
1780
1781         if (delete_branch && rs.nr != 1)
1782                 die("You must specify only one branch name when deleting a remote branch");
1783
1784         setup_git_directory();
1785
1786         memset(remote_dir_exists, -1, 256);
1787
1788         http_init(NULL, repo->url, 1);
1789
1790         is_running_queue = 0;
1791
1792         /* Verify DAV compliance/lock support */
1793         if (!locking_available()) {
1794                 rc = 1;
1795                 goto cleanup;
1796         }
1797
1798         sigchain_push_common(remove_locks_on_signal);
1799
1800         /* Check whether the remote has server info files */
1801         repo->can_update_info_refs = 0;
1802         repo->has_info_refs = remote_exists("info/refs");
1803         repo->has_info_packs = remote_exists("objects/info/packs");
1804         if (repo->has_info_refs) {
1805                 info_ref_lock = lock_remote("info/refs", LOCK_TIME);
1806                 if (info_ref_lock)
1807                         repo->can_update_info_refs = 1;
1808                 else {
1809                         error("cannot lock existing info/refs");
1810                         rc = 1;
1811                         goto cleanup;
1812                 }
1813         }
1814         if (repo->has_info_packs)
1815                 fetch_indices();
1816
1817         /* Get a list of all local and remote heads to validate refspecs */
1818         local_refs = get_local_heads();
1819         fprintf(stderr, "Fetching remote heads...\n");
1820         get_dav_remote_heads();
1821         run_request_queue();
1822
1823         /* Remove a remote branch if -d or -D was specified */
1824         if (delete_branch) {
1825                 const char *branch = rs.items[i].src;
1826                 if (delete_remote_branch(branch, force_delete) == -1) {
1827                         fprintf(stderr, "Unable to delete remote branch %s\n",
1828                                 branch);
1829                         if (helper_status)
1830                                 printf("error %s cannot remove\n", branch);
1831                 }
1832                 goto cleanup;
1833         }
1834
1835         /* match them up */
1836         if (match_push_refs(local_refs, &remote_refs, &rs, push_all)) {
1837                 rc = -1;
1838                 goto cleanup;
1839         }
1840         if (!remote_refs) {
1841                 fprintf(stderr, "No refs in common and none specified; doing nothing.\n");
1842                 if (helper_status)
1843                         printf("error null no match\n");
1844                 rc = 0;
1845                 goto cleanup;
1846         }
1847
1848         new_refs = 0;
1849         for (ref = remote_refs; ref; ref = ref->next) {
1850                 struct rev_info revs;
1851                 struct strvec commit_argv = STRVEC_INIT;
1852
1853                 if (!ref->peer_ref)
1854                         continue;
1855
1856                 if (is_null_oid(&ref->peer_ref->new_oid)) {
1857                         if (delete_remote_branch(ref->name, 1) == -1) {
1858                                 error("Could not remove %s", ref->name);
1859                                 if (helper_status)
1860                                         printf("error %s cannot remove\n", ref->name);
1861                                 rc = -4;
1862                         }
1863                         else if (helper_status)
1864                                 printf("ok %s\n", ref->name);
1865                         new_refs++;
1866                         continue;
1867                 }
1868
1869                 if (oideq(&ref->old_oid, &ref->peer_ref->new_oid)) {
1870                         if (push_verbosely)
1871                                 /* stable plumbing output; do not modify or localize */
1872                                 fprintf(stderr, "'%s': up-to-date\n", ref->name);
1873                         if (helper_status)
1874                                 printf("ok %s up to date\n", ref->name);
1875                         continue;
1876                 }
1877
1878                 if (!force_all &&
1879                     !is_null_oid(&ref->old_oid) &&
1880                     !ref->force) {
1881                         if (!repo_has_object_file(the_repository, &ref->old_oid) ||
1882                             !ref_newer(&ref->peer_ref->new_oid,
1883                                        &ref->old_oid)) {
1884                                 /*
1885                                  * We do not have the remote ref, or
1886                                  * we know that the remote ref is not
1887                                  * an ancestor of what we are trying to
1888                                  * push.  Either way this can be losing
1889                                  * commits at the remote end and likely
1890                                  * we were not up to date to begin with.
1891                                  */
1892                                 /* stable plumbing output; do not modify or localize */
1893                                 error("remote '%s' is not an ancestor of\n"
1894                                       "local '%s'.\n"
1895                                       "Maybe you are not up-to-date and "
1896                                       "need to pull first?",
1897                                       ref->name,
1898                                       ref->peer_ref->name);
1899                                 if (helper_status)
1900                                         printf("error %s non-fast forward\n", ref->name);
1901                                 rc = -2;
1902                                 continue;
1903                         }
1904                 }
1905                 oidcpy(&ref->new_oid, &ref->peer_ref->new_oid);
1906                 new_refs++;
1907
1908                 fprintf(stderr, "updating '%s'", ref->name);
1909                 if (strcmp(ref->name, ref->peer_ref->name))
1910                         fprintf(stderr, " using '%s'", ref->peer_ref->name);
1911                 fprintf(stderr, "\n  from %s\n  to   %s\n",
1912                         oid_to_hex(&ref->old_oid), oid_to_hex(&ref->new_oid));
1913                 if (dry_run) {
1914                         if (helper_status)
1915                                 printf("ok %s\n", ref->name);
1916                         continue;
1917                 }
1918
1919                 /* Lock remote branch ref */
1920                 ref_lock = lock_remote(ref->name, LOCK_TIME);
1921                 if (!ref_lock) {
1922                         fprintf(stderr, "Unable to lock remote branch %s\n",
1923                                 ref->name);
1924                         if (helper_status)
1925                                 printf("error %s lock error\n", ref->name);
1926                         rc = 1;
1927                         continue;
1928                 }
1929
1930                 /* Set up revision info for this refspec */
1931                 strvec_push(&commit_argv, ""); /* ignored */
1932                 strvec_push(&commit_argv, "--objects");
1933                 strvec_push(&commit_argv, oid_to_hex(&ref->new_oid));
1934                 if (!push_all && !is_null_oid(&ref->old_oid))
1935                         strvec_pushf(&commit_argv, "^%s",
1936                                      oid_to_hex(&ref->old_oid));
1937                 repo_init_revisions(the_repository, &revs, setup_git_directory());
1938                 setup_revisions(commit_argv.nr, commit_argv.v, &revs, NULL);
1939                 revs.edge_hint = 0; /* just in case */
1940
1941                 /* Generate a list of objects that need to be pushed */
1942                 pushing = 0;
1943                 if (prepare_revision_walk(&revs))
1944                         die("revision walk setup failed");
1945                 mark_edges_uninteresting(&revs, NULL, 0);
1946                 objects_to_send = get_delta(&revs, ref_lock);
1947                 finish_all_active_slots();
1948
1949                 /* Push missing objects to remote, this would be a
1950                    convenient time to pack them first if appropriate. */
1951                 pushing = 1;
1952                 if (objects_to_send)
1953                         fprintf(stderr, "    sending %d objects\n",
1954                                 objects_to_send);
1955
1956                 run_request_queue();
1957
1958                 /* Update the remote branch if all went well */
1959                 if (aborted || !update_remote(&ref->new_oid, ref_lock))
1960                         rc = 1;
1961
1962                 if (!rc)
1963                         fprintf(stderr, "    done\n");
1964                 if (helper_status)
1965                         printf("%s %s\n", !rc ? "ok" : "error", ref->name);
1966                 unlock_remote(ref_lock);
1967                 check_locks();
1968                 strvec_clear(&commit_argv);
1969                 release_revisions(&revs);
1970         }
1971
1972         /* Update remote server info if appropriate */
1973         if (repo->has_info_refs && new_refs) {
1974                 if (info_ref_lock && repo->can_update_info_refs) {
1975                         fprintf(stderr, "Updating remote server info\n");
1976                         if (!dry_run)
1977                                 update_remote_info_refs(info_ref_lock);
1978                 } else {
1979                         fprintf(stderr, "Unable to update server info\n");
1980                 }
1981         }
1982
1983  cleanup:
1984         if (info_ref_lock)
1985                 unlock_remote(info_ref_lock);
1986         free(repo->url);
1987         free(repo);
1988
1989         http_cleanup();
1990
1991         request = request_queue_head;
1992         while (request != NULL) {
1993                 next_request = request->next;
1994                 release_request(request);
1995                 request = next_request;
1996         }
1997
1998         refspec_clear(&rs);
1999         free_refs(local_refs);
2000
2001         return rc;
2002 }