#include "cache.h" #include "commit.h" #include "pack.h" #include "tag.h" #include "blob.h" #include "http.h" #include "refs.h" #include "diff.h" #include "revision.h" #include "exec_cmd.h" #include "remote.h" #include "list-objects.h" #include "sigchain.h" #include <expat.h> static const char http_push_usage[] = "git http-push [--all] [--dry-run] [--force] [--verbose] <remote> [<head>...]\n"; #ifndef XML_STATUS_OK enum XML_Status { XML_STATUS_OK = 1, XML_STATUS_ERROR = 0 }; #define XML_STATUS_OK 1 #define XML_STATUS_ERROR 0 #endif #define PREV_BUF_SIZE 4096 #define RANGE_HEADER_SIZE 30 /* DAV methods */ #define DAV_LOCK "LOCK" #define DAV_MKCOL "MKCOL" #define DAV_MOVE "MOVE" #define DAV_PROPFIND "PROPFIND" #define DAV_PUT "PUT" #define DAV_UNLOCK "UNLOCK" #define DAV_DELETE "DELETE" /* DAV lock flags */ #define DAV_PROP_LOCKWR (1u << 0) #define DAV_PROP_LOCKEX (1u << 1) #define DAV_LOCK_OK (1u << 2) /* DAV XML properties */ #define DAV_CTX_LOCKENTRY ".multistatus.response.propstat.prop.supportedlock.lockentry" #define DAV_CTX_LOCKTYPE_WRITE ".multistatus.response.propstat.prop.supportedlock.lockentry.locktype.write" #define DAV_CTX_LOCKTYPE_EXCLUSIVE ".multistatus.response.propstat.prop.supportedlock.lockentry.lockscope.exclusive" #define DAV_ACTIVELOCK_OWNER ".prop.lockdiscovery.activelock.owner.href" #define DAV_ACTIVELOCK_TIMEOUT ".prop.lockdiscovery.activelock.timeout" #define DAV_ACTIVELOCK_TOKEN ".prop.lockdiscovery.activelock.locktoken.href" #define DAV_PROPFIND_RESP ".multistatus.response" #define DAV_PROPFIND_NAME ".multistatus.response.href" #define DAV_PROPFIND_COLLECTION ".multistatus.response.propstat.prop.resourcetype.collection" /* DAV request body templates */ #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>" #define PROPFIND_ALL_REQUEST "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n<D:propfind xmlns:D=\"DAV:\">\n<D:allprop/>\n</D:propfind>" #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>" #define LOCK_TIME 600 #define LOCK_REFRESH 30 /* bits #0-15 in revision.h */ #define LOCAL (1u<<16) #define REMOTE (1u<<17) #define FETCHING (1u<<18) #define PUSHING (1u<<19) /* We allow "recursive" symbolic refs. Only within reason, though */ #define MAXDEPTH 5 static int pushing; static int aborted; static signed char remote_dir_exists[256]; static struct curl_slist *no_pragma_header; static int push_verbosely; static int push_all = MATCH_REFS_NONE; static int force_all; static int dry_run; static struct object_list *objects; struct repo { char *url; char *path; int path_len; int has_info_refs; int can_update_info_refs; int has_info_packs; struct packed_git *packs; struct remote_lock *locks; }; static struct repo *remote; enum transfer_state { NEED_FETCH, RUN_FETCH_LOOSE, RUN_FETCH_PACKED, NEED_PUSH, RUN_MKCOL, RUN_PUT, RUN_MOVE, ABORTED, COMPLETE, }; struct transfer_request { struct object *obj; char *url; char *dest; struct remote_lock *lock; struct curl_slist *headers; struct buffer buffer; char filename[PATH_MAX]; char tmpfile[PATH_MAX]; int local_fileno; FILE *local_stream; enum transfer_state state; CURLcode curl_result; char errorstr[CURL_ERROR_SIZE]; long http_code; unsigned char real_sha1[20]; git_SHA_CTX c; z_stream stream; int zret; int rename; void *userData; struct active_request_slot *slot; struct transfer_request *next; }; static struct transfer_request *request_queue_head; struct xml_ctx { char *name; int len; char *cdata; void (*userFunc)(struct xml_ctx *ctx, int tag_closed); void *userData; }; struct remote_lock { char *url; char *owner; char *token; char tmpfile_suffix[41]; time_t start_time; long timeout; int refreshing; struct remote_lock *next; }; /* Flags that control remote_ls processing */ #define PROCESS_FILES (1u << 0) #define PROCESS_DIRS (1u << 1) #define RECURSIVE (1u << 2) /* Flags that remote_ls passes to callback functions */ #define IS_DIR (1u << 0) struct remote_ls_ctx { char *path; void (*userFunc)(struct remote_ls_ctx *ls); void *userData; int flags; char *dentry_name; int dentry_flags; struct remote_ls_ctx *parent; }; /* get_dav_token_headers options */ enum dav_header_flag { DAV_HEADER_IF = (1u << 0), DAV_HEADER_LOCK = (1u << 1), DAV_HEADER_TIMEOUT = (1u << 2) }; static struct curl_slist *get_dav_token_headers(struct remote_lock *lock, enum dav_header_flag options) { struct strbuf buf = STRBUF_INIT; struct curl_slist *dav_headers = NULL; if (options & DAV_HEADER_IF) { strbuf_addf(&buf, "If: (<%s>)", lock->token); dav_headers = curl_slist_append(dav_headers, buf.buf); strbuf_reset(&buf); } if (options & DAV_HEADER_LOCK) { strbuf_addf(&buf, "Lock-Token: <%s>", lock->token); dav_headers = curl_slist_append(dav_headers, buf.buf); strbuf_reset(&buf); } if (options & DAV_HEADER_TIMEOUT) { strbuf_addf(&buf, "Timeout: Second-%ld", lock->timeout); dav_headers = curl_slist_append(dav_headers, buf.buf); strbuf_reset(&buf); } strbuf_release(&buf); return dav_headers; } static void append_remote_object_url(struct strbuf *buf, const char *url, const char *hex, int only_two_digit_prefix) { strbuf_addf(buf, "%sobjects/%.*s/", url, 2, hex); if (!only_two_digit_prefix) strbuf_addf(buf, "%s", hex+2); } static void finish_request(struct transfer_request *request); static void release_request(struct transfer_request *request); static void process_response(void *callback_data) { struct transfer_request *request = (struct transfer_request *)callback_data; finish_request(request); } #ifdef USE_CURL_MULTI static char *get_remote_object_url(const char *url, const char *hex, int only_two_digit_prefix) { struct strbuf buf = STRBUF_INIT; append_remote_object_url(&buf, url, hex, only_two_digit_prefix); return strbuf_detach(&buf, NULL); } static size_t fwrite_sha1_file(void *ptr, size_t eltsize, size_t nmemb, void *data) { unsigned char expn[4096]; size_t size = eltsize * nmemb; int posn = 0; struct transfer_request *request = (struct transfer_request *)data; do { ssize_t retval = xwrite(request->local_fileno, (char *) ptr + posn, size - posn); if (retval < 0) return posn; posn += retval; } while (posn < size); request->stream.avail_in = size; request->stream.next_in = ptr; do { request->stream.next_out = expn; request->stream.avail_out = sizeof(expn); request->zret = git_inflate(&request->stream, Z_SYNC_FLUSH); git_SHA1_Update(&request->c, expn, sizeof(expn) - request->stream.avail_out); } while (request->stream.avail_in && request->zret == Z_OK); data_received++; return size; } static void start_fetch_loose(struct transfer_request *request) { char *hex = sha1_to_hex(request->obj->sha1); char *filename; char prevfile[PATH_MAX]; char *url; int prevlocal; unsigned char prev_buf[PREV_BUF_SIZE]; ssize_t prev_read = 0; long prev_posn = 0; char range[RANGE_HEADER_SIZE]; struct curl_slist *range_header = NULL; struct active_request_slot *slot; filename = sha1_file_name(request->obj->sha1); snprintf(request->filename, sizeof(request->filename), "%s", filename); snprintf(request->tmpfile, sizeof(request->tmpfile), "%s.temp", filename); snprintf(prevfile, sizeof(prevfile), "%s.prev", request->filename); unlink(prevfile); rename(request->tmpfile, prevfile); unlink(request->tmpfile); if (request->local_fileno != -1) error("fd leakage in start: %d", request->local_fileno); request->local_fileno = open(request->tmpfile, O_WRONLY | O_CREAT | O_EXCL, 0666); /* This could have failed due to the "lazy directory creation"; * try to mkdir the last path component. */ if (request->local_fileno < 0 && errno == ENOENT) { char *dir = strrchr(request->tmpfile, '/'); if (dir) { *dir = 0; mkdir(request->tmpfile, 0777); *dir = '/'; } request->local_fileno = open(request->tmpfile, O_WRONLY | O_CREAT | O_EXCL, 0666); } if (request->local_fileno < 0) { request->state = ABORTED; error("Couldn't create temporary file %s for %s: %s", request->tmpfile, request->filename, strerror(errno)); return; } memset(&request->stream, 0, sizeof(request->stream)); git_inflate_init(&request->stream); git_SHA1_Init(&request->c); url = get_remote_object_url(remote->url, hex, 0); request->url = xstrdup(url); /* If a previous temp file is present, process what was already fetched. */ prevlocal = open(prevfile, O_RDONLY); if (prevlocal != -1) { do { prev_read = xread(prevlocal, prev_buf, PREV_BUF_SIZE); if (prev_read>0) { if (fwrite_sha1_file(prev_buf, 1, prev_read, request) == prev_read) { prev_posn += prev_read; } else { prev_read = -1; } } } while (prev_read > 0); close(prevlocal); } unlink(prevfile); /* Reset inflate/SHA1 if there was an error reading the previous temp file; also rewind to the beginning of the local file. */ if (prev_read == -1) { memset(&request->stream, 0, sizeof(request->stream)); git_inflate_init(&request->stream); git_SHA1_Init(&request->c); if (prev_posn>0) { prev_posn = 0; lseek(request->local_fileno, 0, SEEK_SET); ftruncate(request->local_fileno, 0); } } slot = get_active_slot(); slot->callback_func = process_response; slot->callback_data = request; request->slot = slot; curl_easy_setopt(slot->curl, CURLOPT_FILE, request); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_sha1_file); curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); /* If we have successfully processed data from a previous fetch attempt, only fetch the data we don't already have. */ if (prev_posn>0) { if (push_verbosely) fprintf(stderr, "Resuming fetch of object %s at byte %ld\n", hex, prev_posn); sprintf(range, "Range: bytes=%ld-", prev_posn); range_header = curl_slist_append(range_header, range); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header); } /* Try to get the request started, abort the request on error */ request->state = RUN_FETCH_LOOSE; if (!start_active_slot(slot)) { fprintf(stderr, "Unable to start GET request\n"); remote->can_update_info_refs = 0; release_request(request); } } static void start_mkcol(struct transfer_request *request) { char *hex = sha1_to_hex(request->obj->sha1); struct active_request_slot *slot; request->url = get_remote_object_url(remote->url, hex, 1); slot = get_active_slot(); slot->callback_func = process_response; slot->callback_data = request; curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */ curl_easy_setopt(slot->curl, CURLOPT_URL, request->url); curl_easy_setopt(slot->curl, CURLOPT_ERRORBUFFER, request->errorstr); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); if (start_active_slot(slot)) { request->slot = slot; request->state = RUN_MKCOL; } else { request->state = ABORTED; free(request->url); request->url = NULL; } } #endif static void start_fetch_packed(struct transfer_request *request) { char *url; struct packed_git *target; FILE *packfile; char *filename; long prev_posn = 0; char range[RANGE_HEADER_SIZE]; struct curl_slist *range_header = NULL; struct transfer_request *check_request = request_queue_head; struct active_request_slot *slot; target = find_sha1_pack(request->obj->sha1, remote->packs); if (!target) { fprintf(stderr, "Unable to fetch %s, will not be able to update server info refs\n", sha1_to_hex(request->obj->sha1)); remote->can_update_info_refs = 0; release_request(request); return; } fprintf(stderr, "Fetching pack %s\n", sha1_to_hex(target->sha1)); fprintf(stderr, " which contains %s\n", sha1_to_hex(request->obj->sha1)); filename = sha1_pack_name(target->sha1); snprintf(request->filename, sizeof(request->filename), "%s", filename); snprintf(request->tmpfile, sizeof(request->tmpfile), "%s.temp", filename); url = xmalloc(strlen(remote->url) + 64); sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, sha1_to_hex(target->sha1)); /* Make sure there isn't another open request for this pack */ while (check_request) { if (check_request->state == RUN_FETCH_PACKED && !strcmp(check_request->url, url)) { free(url); release_request(request); return; } check_request = check_request->next; } packfile = fopen(request->tmpfile, "a"); if (!packfile) { fprintf(stderr, "Unable to open local file %s for pack", request->tmpfile); remote->can_update_info_refs = 0; free(url); return; } slot = get_active_slot(); slot->callback_func = process_response; slot->callback_data = request; request->slot = slot; request->local_stream = packfile; request->userData = target; request->url = url; curl_easy_setopt(slot->curl, CURLOPT_FILE, packfile); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); slot->local = packfile; /* If there is data present from a previous transfer attempt, resume where it left off */ prev_posn = ftell(packfile); if (prev_posn>0) { if (push_verbosely) fprintf(stderr, "Resuming fetch of pack %s at byte %ld\n", sha1_to_hex(target->sha1), prev_posn); sprintf(range, "Range: bytes=%ld-", prev_posn); range_header = curl_slist_append(range_header, range); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header); } /* Try to get the request started, abort the request on error */ request->state = RUN_FETCH_PACKED; if (!start_active_slot(slot)) { fprintf(stderr, "Unable to start GET request\n"); remote->can_update_info_refs = 0; release_request(request); } } static void start_put(struct transfer_request *request) { char *hex = sha1_to_hex(request->obj->sha1); struct active_request_slot *slot; struct strbuf buf = STRBUF_INIT; enum object_type type; char hdr[50]; void *unpacked; unsigned long len; int hdrlen; ssize_t size; z_stream stream; unpacked = read_sha1_file(request->obj->sha1, &type, &len); hdrlen = sprintf(hdr, "%s %lu", typename(type), len) + 1; /* Set it up */ memset(&stream, 0, sizeof(stream)); deflateInit(&stream, zlib_compression_level); size = deflateBound(&stream, len + hdrlen); strbuf_init(&request->buffer.buf, size); request->buffer.posn = 0; /* Compress it */ stream.next_out = (unsigned char *)request->buffer.buf.buf; stream.avail_out = size; /* First header.. */ stream.next_in = (void *)hdr; stream.avail_in = hdrlen; while (deflate(&stream, 0) == Z_OK) /* nothing */; /* Then the data itself.. */ stream.next_in = unpacked; stream.avail_in = len; while (deflate(&stream, Z_FINISH) == Z_OK) /* nothing */; deflateEnd(&stream); free(unpacked); request->buffer.buf.len = stream.total_out; strbuf_addstr(&buf, "Destination: "); append_remote_object_url(&buf, remote->url, hex, 0); request->dest = strbuf_detach(&buf, NULL); append_remote_object_url(&buf, remote->url, hex, 0); strbuf_add(&buf, request->lock->tmpfile_suffix, 41); request->url = strbuf_detach(&buf, NULL); slot = get_active_slot(); slot->callback_func = process_response; slot->callback_data = request; curl_easy_setopt(slot->curl, CURLOPT_INFILE, &request->buffer); curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, request->buffer.buf.len); curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT); curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1); curl_easy_setopt(slot->curl, CURLOPT_PUT, 1); curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); curl_easy_setopt(slot->curl, CURLOPT_URL, request->url); if (start_active_slot(slot)) { request->slot = slot; request->state = RUN_PUT; } else { request->state = ABORTED; free(request->url); request->url = NULL; } } static void start_move(struct transfer_request *request) { struct active_request_slot *slot; struct curl_slist *dav_headers = NULL; slot = get_active_slot(); slot->callback_func = process_response; slot->callback_data = request; curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); /* undo PUT setup */ curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MOVE); dav_headers = curl_slist_append(dav_headers, request->dest); dav_headers = curl_slist_append(dav_headers, "Overwrite: T"); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); curl_easy_setopt(slot->curl, CURLOPT_URL, request->url); if (start_active_slot(slot)) { request->slot = slot; request->state = RUN_MOVE; } else { request->state = ABORTED; free(request->url); request->url = NULL; } } static int refresh_lock(struct remote_lock *lock) { struct active_request_slot *slot; struct slot_results results; struct curl_slist *dav_headers; int rc = 0; lock->refreshing = 1; dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF | DAV_HEADER_TIMEOUT); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result != CURLE_OK) { fprintf(stderr, "LOCK HTTP error %ld\n", results.http_code); } else { lock->start_time = time(NULL); rc = 1; } } lock->refreshing = 0; curl_slist_free_all(dav_headers); return rc; } static void check_locks(void) { struct remote_lock *lock = remote->locks; time_t current_time = time(NULL); int time_remaining; while (lock) { time_remaining = lock->start_time + lock->timeout - current_time; if (!lock->refreshing && time_remaining < LOCK_REFRESH) { if (!refresh_lock(lock)) { fprintf(stderr, "Unable to refresh lock for %s\n", lock->url); aborted = 1; return; } } lock = lock->next; } } static void release_request(struct transfer_request *request) { struct transfer_request *entry = request_queue_head; if (request == request_queue_head) { request_queue_head = request->next; } else { while (entry->next != NULL && entry->next != request) entry = entry->next; if (entry->next == request) entry->next = entry->next->next; } if (request->local_fileno != -1) close(request->local_fileno); if (request->local_stream) fclose(request->local_stream); free(request->url); free(request); } static void finish_request(struct transfer_request *request) { struct stat st; struct packed_git *target; struct packed_git **lst; request->curl_result = request->slot->curl_result; request->http_code = request->slot->http_code; request->slot = NULL; /* Keep locks active */ check_locks(); if (request->headers != NULL) curl_slist_free_all(request->headers); /* URL is reused for MOVE after PUT */ if (request->state != RUN_PUT) { free(request->url); request->url = NULL; } if (request->state == RUN_MKCOL) { if (request->curl_result == CURLE_OK || request->http_code == 405) { remote_dir_exists[request->obj->sha1[0]] = 1; start_put(request); } else { fprintf(stderr, "MKCOL %s failed, aborting (%d/%ld)\n", sha1_to_hex(request->obj->sha1), request->curl_result, request->http_code); request->state = ABORTED; aborted = 1; } } else if (request->state == RUN_PUT) { if (request->curl_result == CURLE_OK) { start_move(request); } else { fprintf(stderr, "PUT %s failed, aborting (%d/%ld)\n", sha1_to_hex(request->obj->sha1), request->curl_result, request->http_code); request->state = ABORTED; aborted = 1; } } else if (request->state == RUN_MOVE) { if (request->curl_result == CURLE_OK) { if (push_verbosely) fprintf(stderr, " sent %s\n", sha1_to_hex(request->obj->sha1)); request->obj->flags |= REMOTE; release_request(request); } else { fprintf(stderr, "MOVE %s failed, aborting (%d/%ld)\n", sha1_to_hex(request->obj->sha1), request->curl_result, request->http_code); request->state = ABORTED; aborted = 1; } } else if (request->state == RUN_FETCH_LOOSE) { fchmod(request->local_fileno, 0444); close(request->local_fileno); request->local_fileno = -1; if (request->curl_result != CURLE_OK && request->http_code != 416) { if (stat(request->tmpfile, &st) == 0) { if (st.st_size == 0) unlink(request->tmpfile); } } else { if (request->http_code == 416) fprintf(stderr, "Warning: requested range invalid; we may already have all the data.\n"); git_inflate_end(&request->stream); git_SHA1_Final(request->real_sha1, &request->c); if (request->zret != Z_STREAM_END) { unlink(request->tmpfile); } else if (hashcmp(request->obj->sha1, request->real_sha1)) { unlink(request->tmpfile); } else { request->rename = move_temp_to_file( request->tmpfile, request->filename); if (request->rename == 0) { request->obj->flags |= (LOCAL | REMOTE); } } } /* Try fetching packed if necessary */ if (request->obj->flags & LOCAL) release_request(request); else start_fetch_packed(request); } else if (request->state == RUN_FETCH_PACKED) { if (request->curl_result != CURLE_OK) { fprintf(stderr, "Unable to get pack file %s\n%s", request->url, curl_errorstr); remote->can_update_info_refs = 0; } else { off_t pack_size = ftell(request->local_stream); fclose(request->local_stream); request->local_stream = NULL; if (!move_temp_to_file(request->tmpfile, request->filename)) { target = (struct packed_git *)request->userData; target->pack_size = pack_size; lst = &remote->packs; while (*lst != target) lst = &((*lst)->next); *lst = (*lst)->next; if (!verify_pack(target)) install_packed_git(target); else remote->can_update_info_refs = 0; } } release_request(request); } } #ifdef USE_CURL_MULTI static int fill_active_slot(void *unused) { struct transfer_request *request; if (aborted) return 0; for (request = request_queue_head; request; request = request->next) { if (request->state == NEED_FETCH) { start_fetch_loose(request); return 1; } else if (pushing && request->state == NEED_PUSH) { if (remote_dir_exists[request->obj->sha1[0]] == 1) { start_put(request); } else { start_mkcol(request); } return 1; } } return 0; } #endif static void get_remote_object_list(unsigned char parent); static void add_fetch_request(struct object *obj) { struct transfer_request *request; check_locks(); /* * Don't fetch the object if it's known to exist locally * or is already in the request queue */ if (remote_dir_exists[obj->sha1[0]] == -1) get_remote_object_list(obj->sha1[0]); if (obj->flags & (LOCAL | FETCHING)) return; obj->flags |= FETCHING; request = xmalloc(sizeof(*request)); request->obj = obj; request->url = NULL; request->lock = NULL; request->headers = NULL; request->local_fileno = -1; request->local_stream = NULL; request->state = NEED_FETCH; request->next = request_queue_head; request_queue_head = request; #ifdef USE_CURL_MULTI fill_active_slots(); step_active_slots(); #endif } static int add_send_request(struct object *obj, struct remote_lock *lock) { struct transfer_request *request = request_queue_head; struct packed_git *target; /* Keep locks active */ check_locks(); /* * Don't push the object if it's known to exist on the remote * or is already in the request queue */ if (remote_dir_exists[obj->sha1[0]] == -1) get_remote_object_list(obj->sha1[0]); if (obj->flags & (REMOTE | PUSHING)) return 0; target = find_sha1_pack(obj->sha1, remote->packs); if (target) { obj->flags |= REMOTE; return 0; } obj->flags |= PUSHING; request = xmalloc(sizeof(*request)); request->obj = obj; request->url = NULL; request->lock = lock; request->headers = NULL; request->local_fileno = -1; request->local_stream = NULL; request->state = NEED_PUSH; request->next = request_queue_head; request_queue_head = request; #ifdef USE_CURL_MULTI fill_active_slots(); step_active_slots(); #endif return 1; } static int fetch_index(unsigned char *sha1) { char *hex = sha1_to_hex(sha1); char *filename; char *url; char tmpfile[PATH_MAX]; long prev_posn = 0; char range[RANGE_HEADER_SIZE]; struct curl_slist *range_header = NULL; FILE *indexfile; struct active_request_slot *slot; struct slot_results results; /* Don't use the index if the pack isn't there */ url = xmalloc(strlen(remote->url) + 64); sprintf(url, "%sobjects/pack/pack-%s.pack", remote->url, hex); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result != CURLE_OK) { free(url); return error("Unable to verify pack %s is available", hex); } } else { free(url); return error("Unable to start request"); } if (has_pack_index(sha1)) { free(url); return 0; } if (push_verbosely) fprintf(stderr, "Getting index for pack %s\n", hex); sprintf(url, "%sobjects/pack/pack-%s.idx", remote->url, hex); filename = sha1_pack_index_name(sha1); snprintf(tmpfile, sizeof(tmpfile), "%s.temp", filename); indexfile = fopen(tmpfile, "a"); if (!indexfile) { free(url); return error("Unable to open local file %s for pack index", tmpfile); } slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); curl_easy_setopt(slot->curl, CURLOPT_FILE, indexfile); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, no_pragma_header); slot->local = indexfile; /* If there is data present from a previous transfer attempt, resume where it left off */ prev_posn = ftell(indexfile); if (prev_posn>0) { if (push_verbosely) fprintf(stderr, "Resuming fetch of index for pack %s at byte %ld\n", hex, prev_posn); sprintf(range, "Range: bytes=%ld-", prev_posn); range_header = curl_slist_append(range_header, range); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, range_header); } if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result != CURLE_OK) { free(url); fclose(indexfile); return error("Unable to get pack index %s\n%s", url, curl_errorstr); } } else { free(url); fclose(indexfile); return error("Unable to start request"); } free(url); fclose(indexfile); return move_temp_to_file(tmpfile, filename); } static int setup_index(unsigned char *sha1) { struct packed_git *new_pack; if (fetch_index(sha1)) return -1; new_pack = parse_pack_index(sha1); new_pack->next = remote->packs; remote->packs = new_pack; return 0; } static int fetch_indices(void) { unsigned char sha1[20]; char *url; struct strbuf buffer = STRBUF_INIT; char *data; int i = 0; struct active_request_slot *slot; struct slot_results results; if (push_verbosely) fprintf(stderr, "Getting pack list\n"); url = xmalloc(strlen(remote->url) + 20); sprintf(url, "%sobjects/info/packs", remote->url); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result != CURLE_OK) { strbuf_release(&buffer); free(url); if (results.http_code == 404) return 0; else return error("%s", curl_errorstr); } } else { strbuf_release(&buffer); free(url); return error("Unable to start request"); } free(url); data = buffer.buf; while (i < buffer.len) { switch (data[i]) { case 'P': i++; if (i + 52 < buffer.len && !prefixcmp(data + i, " pack-") && !prefixcmp(data + i + 46, ".pack\n")) { get_sha1_hex(data + i + 6, sha1); setup_index(sha1); i += 51; break; } default: while (data[i] != '\n') i++; } i++; } strbuf_release(&buffer); return 0; } static void one_remote_object(const char *hex) { unsigned char sha1[20]; struct object *obj; if (get_sha1_hex(hex, sha1) != 0) return; obj = lookup_object(sha1); if (!obj) obj = parse_object(sha1); /* Ignore remote objects that don't exist locally */ if (!obj) return; obj->flags |= REMOTE; if (!object_list_contains(objects, obj)) object_list_insert(obj, &objects); } static void handle_lockprop_ctx(struct xml_ctx *ctx, int tag_closed) { int *lock_flags = (int *)ctx->userData; if (tag_closed) { if (!strcmp(ctx->name, DAV_CTX_LOCKENTRY)) { if ((*lock_flags & DAV_PROP_LOCKEX) && (*lock_flags & DAV_PROP_LOCKWR)) { *lock_flags |= DAV_LOCK_OK; } *lock_flags &= DAV_LOCK_OK; } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_WRITE)) { *lock_flags |= DAV_PROP_LOCKWR; } else if (!strcmp(ctx->name, DAV_CTX_LOCKTYPE_EXCLUSIVE)) { *lock_flags |= DAV_PROP_LOCKEX; } } } static void handle_new_lock_ctx(struct xml_ctx *ctx, int tag_closed) { struct remote_lock *lock = (struct remote_lock *)ctx->userData; git_SHA_CTX sha_ctx; unsigned char lock_token_sha1[20]; if (tag_closed && ctx->cdata) { if (!strcmp(ctx->name, DAV_ACTIVELOCK_OWNER)) { lock->owner = xmalloc(strlen(ctx->cdata) + 1); strcpy(lock->owner, ctx->cdata); } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TIMEOUT)) { if (!prefixcmp(ctx->cdata, "Second-")) lock->timeout = strtol(ctx->cdata + 7, NULL, 10); } else if (!strcmp(ctx->name, DAV_ACTIVELOCK_TOKEN)) { lock->token = xmalloc(strlen(ctx->cdata) + 1); strcpy(lock->token, ctx->cdata); git_SHA1_Init(&sha_ctx); git_SHA1_Update(&sha_ctx, lock->token, strlen(lock->token)); git_SHA1_Final(lock_token_sha1, &sha_ctx); lock->tmpfile_suffix[0] = '_'; memcpy(lock->tmpfile_suffix + 1, sha1_to_hex(lock_token_sha1), 40); } } } static void one_remote_ref(char *refname); static void xml_start_tag(void *userData, const char *name, const char **atts) { struct xml_ctx *ctx = (struct xml_ctx *)userData; const char *c = strchr(name, ':'); int new_len; if (c == NULL) c = name; else c++; new_len = strlen(ctx->name) + strlen(c) + 2; if (new_len > ctx->len) { ctx->name = xrealloc(ctx->name, new_len); ctx->len = new_len; } strcat(ctx->name, "."); strcat(ctx->name, c); free(ctx->cdata); ctx->cdata = NULL; ctx->userFunc(ctx, 0); } static void xml_end_tag(void *userData, const char *name) { struct xml_ctx *ctx = (struct xml_ctx *)userData; const char *c = strchr(name, ':'); char *ep; ctx->userFunc(ctx, 1); if (c == NULL) c = name; else c++; ep = ctx->name + strlen(ctx->name) - strlen(c) - 1; *ep = 0; } static void xml_cdata(void *userData, const XML_Char *s, int len) { struct xml_ctx *ctx = (struct xml_ctx *)userData; free(ctx->cdata); ctx->cdata = xmemdupz(s, len); } static struct remote_lock *lock_remote(const char *path, long timeout) { struct active_request_slot *slot; struct slot_results results; struct buffer out_buffer = { STRBUF_INIT, 0 }; struct strbuf in_buffer = STRBUF_INIT; char *url; char *ep; char timeout_header[25]; struct remote_lock *lock = NULL; struct curl_slist *dav_headers = NULL; struct xml_ctx ctx; url = xmalloc(strlen(remote->url) + strlen(path) + 1); sprintf(url, "%s%s", remote->url, path); /* Make sure leading directories exist for the remote ref */ ep = strchr(url + strlen(remote->url) + 1, '/'); while (ep) { char saved_character = ep[1]; ep[1] = '\0'; slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_MKCOL); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result != CURLE_OK && results.http_code != 405) { fprintf(stderr, "Unable to create branch path %s\n", url); free(url); return NULL; } } else { fprintf(stderr, "Unable to start MKCOL request\n"); free(url); return NULL; } ep[1] = saved_character; ep = strchr(ep + 1, '/'); } strbuf_addf(&out_buffer.buf, LOCK_REQUEST, git_default_email); sprintf(timeout_header, "Timeout: Second-%ld", timeout); dav_headers = curl_slist_append(dav_headers, timeout_header); dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml"); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer); curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len); curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer); curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_LOCK); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); lock = xcalloc(1, sizeof(*lock)); lock->timeout = -1; if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result == CURLE_OK) { XML_Parser parser = XML_ParserCreate(NULL); enum XML_Status result; ctx.name = xcalloc(10, 1); ctx.len = 0; ctx.cdata = NULL; ctx.userFunc = handle_new_lock_ctx; ctx.userData = lock; XML_SetUserData(parser, &ctx); XML_SetElementHandler(parser, xml_start_tag, xml_end_tag); XML_SetCharacterDataHandler(parser, xml_cdata); result = XML_Parse(parser, in_buffer.buf, in_buffer.len, 1); free(ctx.name); if (result != XML_STATUS_OK) { fprintf(stderr, "XML error: %s\n", XML_ErrorString( XML_GetErrorCode(parser))); lock->timeout = -1; } XML_ParserFree(parser); } } else { fprintf(stderr, "Unable to start LOCK request\n"); } curl_slist_free_all(dav_headers); strbuf_release(&out_buffer.buf); strbuf_release(&in_buffer); if (lock->token == NULL || lock->timeout <= 0) { free(lock->token); free(lock->owner); free(url); free(lock); lock = NULL; } else { lock->url = url; lock->start_time = time(NULL); lock->next = remote->locks; remote->locks = lock; } return lock; } static int unlock_remote(struct remote_lock *lock) { struct active_request_slot *slot; struct slot_results results; struct remote_lock *prev = remote->locks; struct curl_slist *dav_headers; int rc = 0; dav_headers = get_dav_token_headers(lock, DAV_HEADER_LOCK); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_UNLOCK); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result == CURLE_OK) rc = 1; else fprintf(stderr, "UNLOCK HTTP error %ld\n", results.http_code); } else { fprintf(stderr, "Unable to start UNLOCK request\n"); } curl_slist_free_all(dav_headers); if (remote->locks == lock) { remote->locks = lock->next; } else { while (prev && prev->next != lock) prev = prev->next; if (prev) prev->next = prev->next->next; } free(lock->owner); free(lock->url); free(lock->token); free(lock); return rc; } static void remove_locks(void) { struct remote_lock *lock = remote->locks; fprintf(stderr, "Removing remote locks...\n"); while (lock) { unlock_remote(lock); lock = lock->next; } } static void remove_locks_on_signal(int signo) { remove_locks(); sigchain_pop(signo); raise(signo); } static void remote_ls(const char *path, int flags, void (*userFunc)(struct remote_ls_ctx *ls), void *userData); static void process_ls_object(struct remote_ls_ctx *ls) { unsigned int *parent = (unsigned int *)ls->userData; char *path = ls->dentry_name; char *obj_hex; if (!strcmp(ls->path, ls->dentry_name) && (ls->flags & IS_DIR)) { remote_dir_exists[*parent] = 1; return; } if (strlen(path) != 49) return; path += 8; obj_hex = xmalloc(strlen(path)); /* NB: path is not null-terminated, can not use strlcpy here */ memcpy(obj_hex, path, 2); strcpy(obj_hex + 2, path + 3); one_remote_object(obj_hex); free(obj_hex); } static void process_ls_ref(struct remote_ls_ctx *ls) { if (!strcmp(ls->path, ls->dentry_name) && (ls->dentry_flags & IS_DIR)) { fprintf(stderr, " %s\n", ls->dentry_name); return; } if (!(ls->dentry_flags & IS_DIR)) one_remote_ref(ls->dentry_name); } static void handle_remote_ls_ctx(struct xml_ctx *ctx, int tag_closed) { struct remote_ls_ctx *ls = (struct remote_ls_ctx *)ctx->userData; if (tag_closed) { if (!strcmp(ctx->name, DAV_PROPFIND_RESP) && ls->dentry_name) { if (ls->dentry_flags & IS_DIR) { if (ls->flags & PROCESS_DIRS) { ls->userFunc(ls); } if (strcmp(ls->dentry_name, ls->path) && ls->flags & RECURSIVE) { remote_ls(ls->dentry_name, ls->flags, ls->userFunc, ls->userData); } } else if (ls->flags & PROCESS_FILES) { ls->userFunc(ls); } } else if (!strcmp(ctx->name, DAV_PROPFIND_NAME) && ctx->cdata) { char *path = ctx->cdata; if (*ctx->cdata == 'h') { path = strstr(path, "//"); if (path) { path = strchr(path+2, '/'); } } if (path) { path += remote->path_len; ls->dentry_name = xstrdup(path); } } else if (!strcmp(ctx->name, DAV_PROPFIND_COLLECTION)) { ls->dentry_flags |= IS_DIR; } } else if (!strcmp(ctx->name, DAV_PROPFIND_RESP)) { free(ls->dentry_name); ls->dentry_name = NULL; ls->dentry_flags = 0; } } /* * NEEDSWORK: remote_ls() ignores info/refs on the remote side. But it * should _only_ heed the information from that file, instead of trying to * determine the refs from the remote file system (badly: it does not even * know about packed-refs). */ static void remote_ls(const char *path, int flags, void (*userFunc)(struct remote_ls_ctx *ls), void *userData) { char *url = xmalloc(strlen(remote->url) + strlen(path) + 1); struct active_request_slot *slot; struct slot_results results; struct strbuf in_buffer = STRBUF_INIT; struct buffer out_buffer = { STRBUF_INIT, 0 }; struct curl_slist *dav_headers = NULL; struct xml_ctx ctx; struct remote_ls_ctx ls; ls.flags = flags; ls.path = xstrdup(path); ls.dentry_name = NULL; ls.dentry_flags = 0; ls.userData = userData; ls.userFunc = userFunc; sprintf(url, "%s%s", remote->url, path); strbuf_addf(&out_buffer.buf, PROPFIND_ALL_REQUEST); dav_headers = curl_slist_append(dav_headers, "Depth: 1"); dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml"); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer); curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len); curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer); curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result == CURLE_OK) { XML_Parser parser = XML_ParserCreate(NULL); enum XML_Status result; ctx.name = xcalloc(10, 1); ctx.len = 0; ctx.cdata = NULL; ctx.userFunc = handle_remote_ls_ctx; ctx.userData = &ls; XML_SetUserData(parser, &ctx); XML_SetElementHandler(parser, xml_start_tag, xml_end_tag); XML_SetCharacterDataHandler(parser, xml_cdata); result = XML_Parse(parser, in_buffer.buf, in_buffer.len, 1); free(ctx.name); if (result != XML_STATUS_OK) { fprintf(stderr, "XML error: %s\n", XML_ErrorString( XML_GetErrorCode(parser))); } XML_ParserFree(parser); } } else { fprintf(stderr, "Unable to start PROPFIND request\n"); } free(ls.path); free(url); strbuf_release(&out_buffer.buf); strbuf_release(&in_buffer); curl_slist_free_all(dav_headers); } static void get_remote_object_list(unsigned char parent) { char path[] = "objects/XX/"; static const char hex[] = "0123456789abcdef"; unsigned int val = parent; path[8] = hex[val >> 4]; path[9] = hex[val & 0xf]; remote_dir_exists[val] = 0; remote_ls(path, (PROCESS_FILES | PROCESS_DIRS), process_ls_object, &val); } static int locking_available(void) { struct active_request_slot *slot; struct slot_results results; struct strbuf in_buffer = STRBUF_INIT; struct buffer out_buffer = { STRBUF_INIT, 0 }; struct curl_slist *dav_headers = NULL; struct xml_ctx ctx; int lock_flags = 0; strbuf_addf(&out_buffer.buf, PROPFIND_SUPPORTEDLOCK_REQUEST, remote->url); dav_headers = curl_slist_append(dav_headers, "Depth: 0"); dav_headers = curl_slist_append(dav_headers, "Content-Type: text/xml"); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer); curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len); curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer); curl_easy_setopt(slot->curl, CURLOPT_FILE, &in_buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); curl_easy_setopt(slot->curl, CURLOPT_URL, remote->url); curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PROPFIND); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result == CURLE_OK) { XML_Parser parser = XML_ParserCreate(NULL); enum XML_Status result; ctx.name = xcalloc(10, 1); ctx.len = 0; ctx.cdata = NULL; ctx.userFunc = handle_lockprop_ctx; ctx.userData = &lock_flags; XML_SetUserData(parser, &ctx); XML_SetElementHandler(parser, xml_start_tag, xml_end_tag); result = XML_Parse(parser, in_buffer.buf, in_buffer.len, 1); free(ctx.name); if (result != XML_STATUS_OK) { fprintf(stderr, "XML error: %s\n", XML_ErrorString( XML_GetErrorCode(parser))); lock_flags = 0; } XML_ParserFree(parser); if (!lock_flags) error("Error: no DAV locking support on %s", remote->url); } else { error("Cannot access URL %s, return code %d", remote->url, results.curl_result); lock_flags = 0; } } else { error("Unable to start PROPFIND request on %s", remote->url); } strbuf_release(&out_buffer.buf); strbuf_release(&in_buffer); curl_slist_free_all(dav_headers); return lock_flags; } static struct object_list **add_one_object(struct object *obj, struct object_list **p) { struct object_list *entry = xmalloc(sizeof(struct object_list)); entry->item = obj; entry->next = *p; *p = entry; return &entry->next; } static struct object_list **process_blob(struct blob *blob, struct object_list **p, struct name_path *path, const char *name) { struct object *obj = &blob->object; obj->flags |= LOCAL; if (obj->flags & (UNINTERESTING | SEEN)) return p; obj->flags |= SEEN; return add_one_object(obj, p); } static struct object_list **process_tree(struct tree *tree, struct object_list **p, struct name_path *path, const char *name) { struct object *obj = &tree->object; struct tree_desc desc; struct name_entry entry; struct name_path me; obj->flags |= LOCAL; if (obj->flags & (UNINTERESTING | SEEN)) return p; if (parse_tree(tree) < 0) die("bad tree object %s", sha1_to_hex(obj->sha1)); obj->flags |= SEEN; name = xstrdup(name); p = add_one_object(obj, p); me.up = path; me.elem = name; me.elem_len = strlen(name); init_tree_desc(&desc, tree->buffer, tree->size); while (tree_entry(&desc, &entry)) switch (object_type(entry.mode)) { case OBJ_TREE: p = process_tree(lookup_tree(entry.sha1), p, &me, name); break; case OBJ_BLOB: p = process_blob(lookup_blob(entry.sha1), p, &me, name); break; default: /* Subproject commit - not in this repository */ break; } free(tree->buffer); tree->buffer = NULL; return p; } static int get_delta(struct rev_info *revs, struct remote_lock *lock) { int i; struct commit *commit; struct object_list **p = &objects; int count = 0; while ((commit = get_revision(revs)) != NULL) { p = process_tree(commit->tree, p, NULL, ""); commit->object.flags |= LOCAL; if (!(commit->object.flags & UNINTERESTING)) count += add_send_request(&commit->object, lock); } for (i = 0; i < revs->pending.nr; i++) { struct object_array_entry *entry = revs->pending.objects + i; struct object *obj = entry->item; const char *name = entry->name; if (obj->flags & (UNINTERESTING | SEEN)) continue; if (obj->type == OBJ_TAG) { obj->flags |= SEEN; p = add_one_object(obj, p); continue; } if (obj->type == OBJ_TREE) { p = process_tree((struct tree *)obj, p, NULL, name); continue; } if (obj->type == OBJ_BLOB) { p = process_blob((struct blob *)obj, p, NULL, name); continue; } die("unknown pending object %s (%s)", sha1_to_hex(obj->sha1), name); } while (objects) { if (!(objects->item->flags & UNINTERESTING)) count += add_send_request(objects->item, lock); objects = objects->next; } return count; } static int update_remote(unsigned char *sha1, struct remote_lock *lock) { struct active_request_slot *slot; struct slot_results results; struct buffer out_buffer = { STRBUF_INIT, 0 }; struct curl_slist *dav_headers; dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF); strbuf_addf(&out_buffer.buf, "%s\n", sha1_to_hex(sha1)); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_INFILE, &out_buffer); curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, out_buffer.buf.len); curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1); curl_easy_setopt(slot->curl, CURLOPT_PUT, 1); curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url); if (start_active_slot(slot)) { run_active_slot(slot); strbuf_release(&out_buffer.buf); if (results.curl_result != CURLE_OK) { fprintf(stderr, "PUT error: curl result=%d, HTTP code=%ld\n", results.curl_result, results.http_code); /* We should attempt recovery? */ return 0; } } else { strbuf_release(&out_buffer.buf); fprintf(stderr, "Unable to start PUT request\n"); return 0; } return 1; } static struct ref *local_refs, **local_tail; static struct ref *remote_refs, **remote_tail; static int one_local_ref(const char *refname, const unsigned char *sha1, int flag, void *cb_data) { struct ref *ref; int len = strlen(refname) + 1; ref = xcalloc(1, sizeof(*ref) + len); hashcpy(ref->new_sha1, sha1); memcpy(ref->name, refname, len); *local_tail = ref; local_tail = &ref->next; return 0; } static void one_remote_ref(char *refname) { struct ref *ref; struct object *obj; ref = alloc_ref(refname); if (http_fetch_ref(remote->url, ref) != 0) { fprintf(stderr, "Unable to fetch ref %s from %s\n", refname, remote->url); free(ref); return; } /* * Fetch a copy of the object if it doesn't exist locally - it * may be required for updating server info later. */ if (remote->can_update_info_refs && !has_sha1_file(ref->old_sha1)) { obj = lookup_unknown_object(ref->old_sha1); if (obj) { fprintf(stderr, " fetch %s for %s\n", sha1_to_hex(ref->old_sha1), refname); add_fetch_request(obj); } } *remote_tail = ref; remote_tail = &ref->next; } static void get_local_heads(void) { local_tail = &local_refs; for_each_ref(one_local_ref, NULL); } static void get_dav_remote_heads(void) { remote_tail = &remote_refs; remote_ls("refs/", (PROCESS_FILES | PROCESS_DIRS | RECURSIVE), process_ls_ref, NULL); } static int is_zero_sha1(const unsigned char *sha1) { int i; for (i = 0; i < 20; i++) { if (*sha1++) return 0; } return 1; } static void unmark_and_free(struct commit_list *list, unsigned int mark) { while (list) { struct commit_list *temp = list; temp->item->object.flags &= ~mark; list = temp->next; free(temp); } } static int ref_newer(const unsigned char *new_sha1, const unsigned char *old_sha1) { struct object *o; struct commit *old, *new; struct commit_list *list, *used; int found = 0; /* Both new and old must be commit-ish and new is descendant of * old. Otherwise we require --force. */ o = deref_tag(parse_object(old_sha1), NULL, 0); if (!o || o->type != OBJ_COMMIT) return 0; old = (struct commit *) o; o = deref_tag(parse_object(new_sha1), NULL, 0); if (!o || o->type != OBJ_COMMIT) return 0; new = (struct commit *) o; if (parse_commit(new) < 0) return 0; used = list = NULL; commit_list_insert(new, &list); while (list) { new = pop_most_recent_commit(&list, TMP_MARK); commit_list_insert(new, &used); if (new == old) { found = 1; break; } } unmark_and_free(list, TMP_MARK); unmark_and_free(used, TMP_MARK); return found; } static void add_remote_info_ref(struct remote_ls_ctx *ls) { struct strbuf *buf = (struct strbuf *)ls->userData; struct object *o; int len; char *ref_info; struct ref *ref; ref = alloc_ref(ls->dentry_name); if (http_fetch_ref(remote->url, ref) != 0) { fprintf(stderr, "Unable to fetch ref %s from %s\n", ls->dentry_name, remote->url); aborted = 1; free(ref); return; } o = parse_object(ref->old_sha1); if (!o) { fprintf(stderr, "Unable to parse object %s for remote ref %s\n", sha1_to_hex(ref->old_sha1), ls->dentry_name); aborted = 1; free(ref); return; } len = strlen(ls->dentry_name) + 42; ref_info = xcalloc(len + 1, 1); sprintf(ref_info, "%s %s\n", sha1_to_hex(ref->old_sha1), ls->dentry_name); fwrite_buffer(ref_info, 1, len, buf); free(ref_info); if (o->type == OBJ_TAG) { o = deref_tag(o, ls->dentry_name, 0); if (o) { len = strlen(ls->dentry_name) + 45; ref_info = xcalloc(len + 1, 1); sprintf(ref_info, "%s %s^{}\n", sha1_to_hex(o->sha1), ls->dentry_name); fwrite_buffer(ref_info, 1, len, buf); free(ref_info); } } free(ref); } static void update_remote_info_refs(struct remote_lock *lock) { struct buffer buffer = { STRBUF_INIT, 0 }; struct active_request_slot *slot; struct slot_results results; struct curl_slist *dav_headers; remote_ls("refs/", (PROCESS_FILES | RECURSIVE), add_remote_info_ref, &buffer.buf); if (!aborted) { dav_headers = get_dav_token_headers(lock, DAV_HEADER_IF); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_INFILE, &buffer); curl_easy_setopt(slot->curl, CURLOPT_INFILESIZE, buffer.buf.len); curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, fread_buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_PUT); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, dav_headers); curl_easy_setopt(slot->curl, CURLOPT_UPLOAD, 1); curl_easy_setopt(slot->curl, CURLOPT_PUT, 1); curl_easy_setopt(slot->curl, CURLOPT_URL, lock->url); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result != CURLE_OK) { fprintf(stderr, "PUT error: curl result=%d, HTTP code=%ld\n", results.curl_result, results.http_code); } } } strbuf_release(&buffer.buf); } static int remote_exists(const char *path) { char *url = xmalloc(strlen(remote->url) + strlen(path) + 1); struct active_request_slot *slot; struct slot_results results; int ret = -1; sprintf(url, "%s%s", remote->url, path); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 1); if (start_active_slot(slot)) { run_active_slot(slot); if (results.http_code == 404) ret = 0; else if (results.curl_result == CURLE_OK) ret = 1; else fprintf(stderr, "HEAD HTTP error %ld\n", results.http_code); } else { fprintf(stderr, "Unable to start HEAD request\n"); } free(url); return ret; } static void fetch_symref(const char *path, char **symref, unsigned char *sha1) { char *url; struct strbuf buffer = STRBUF_INIT; struct active_request_slot *slot; struct slot_results results; url = xmalloc(strlen(remote->url) + strlen(path) + 1); sprintf(url, "%s%s", remote->url, path); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_FILE, &buffer); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, NULL); curl_easy_setopt(slot->curl, CURLOPT_URL, url); if (start_active_slot(slot)) { run_active_slot(slot); if (results.curl_result != CURLE_OK) { die("Couldn't get %s for remote symref\n%s", url, curl_errorstr); } } else { die("Unable to start remote symref request"); } free(url); free(*symref); *symref = NULL; hashclr(sha1); if (buffer.len == 0) return; /* If it's a symref, set the refname; otherwise try for a sha1 */ if (!prefixcmp((char *)buffer.buf, "ref: ")) { *symref = xmemdupz((char *)buffer.buf + 5, buffer.len - 6); } else { get_sha1_hex(buffer.buf, sha1); } strbuf_release(&buffer); } static int verify_merge_base(unsigned char *head_sha1, unsigned char *branch_sha1) { struct commit *head = lookup_commit(head_sha1); struct commit *branch = lookup_commit(branch_sha1); struct commit_list *merge_bases = get_merge_bases(head, branch, 1); return (merge_bases && !merge_bases->next && merge_bases->item == branch); } static int delete_remote_branch(char *pattern, int force) { struct ref *refs = remote_refs; struct ref *remote_ref = NULL; unsigned char head_sha1[20]; char *symref = NULL; int match; int patlen = strlen(pattern); int i; struct active_request_slot *slot; struct slot_results results; char *url; /* Find the remote branch(es) matching the specified branch name */ for (match = 0; refs; refs = refs->next) { char *name = refs->name; int namelen = strlen(name); if (namelen < patlen || memcmp(name + namelen - patlen, pattern, patlen)) continue; if (namelen != patlen && name[namelen - patlen - 1] != '/') continue; match++; remote_ref = refs; } if (match == 0) return error("No remote branch matches %s", pattern); if (match != 1) return error("More than one remote branch matches %s", pattern); /* * Remote HEAD must be a symref (not exactly foolproof; a remote * symlink to a symref will look like a symref) */ fetch_symref("HEAD", &symref, head_sha1); if (!symref) return error("Remote HEAD is not a symref"); /* Remote branch must not be the remote HEAD */ for (i=0; symref && i<MAXDEPTH; i++) { if (!strcmp(remote_ref->name, symref)) return error("Remote branch %s is the current HEAD", remote_ref->name); fetch_symref(symref, &symref, head_sha1); } /* Run extra sanity checks if delete is not forced */ if (!force) { /* Remote HEAD must resolve to a known object */ if (symref) return error("Remote HEAD symrefs too deep"); if (is_zero_sha1(head_sha1)) return error("Unable to resolve remote HEAD"); if (!has_sha1_file(head_sha1)) return error("Remote HEAD resolves to object %s\nwhich does not exist locally, perhaps you need to fetch?", sha1_to_hex(head_sha1)); /* Remote branch must resolve to a known object */ if (is_zero_sha1(remote_ref->old_sha1)) return error("Unable to resolve remote branch %s", remote_ref->name); if (!has_sha1_file(remote_ref->old_sha1)) 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)); /* Remote branch must be an ancestor of remote HEAD */ if (!verify_merge_base(head_sha1, remote_ref->old_sha1)) { return error("The branch '%s' is not an ancestor " "of your current HEAD.\n" "If you are sure you want to delete it," " run:\n\t'git http-push -D %s %s'", remote_ref->name, remote->url, pattern); } } /* Send delete request */ fprintf(stderr, "Removing remote branch '%s'\n", remote_ref->name); if (dry_run) return 0; url = xmalloc(strlen(remote->url) + strlen(remote_ref->name) + 1); sprintf(url, "%s%s", remote->url, remote_ref->name); slot = get_active_slot(); slot->results = &results; curl_easy_setopt(slot->curl, CURLOPT_HTTPGET, 1); curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_null); curl_easy_setopt(slot->curl, CURLOPT_URL, url); curl_easy_setopt(slot->curl, CURLOPT_CUSTOMREQUEST, DAV_DELETE); if (start_active_slot(slot)) { run_active_slot(slot); free(url); if (results.curl_result != CURLE_OK) return error("DELETE request failed (%d/%ld)\n", results.curl_result, results.http_code); } else { free(url); return error("Unable to start DELETE request"); } return 0; } int main(int argc, char **argv) { struct transfer_request *request; struct transfer_request *next_request; int nr_refspec = 0; char **refspec = NULL; struct remote_lock *ref_lock = NULL; struct remote_lock *info_ref_lock = NULL; struct rev_info revs; int delete_branch = 0; int force_delete = 0; int objects_to_send; int rc = 0; int i; int new_refs; struct ref *ref; char *rewritten_url = NULL; git_extract_argv0_path(argv[0]); setup_git_directory(); remote = xcalloc(sizeof(*remote), 1); argv++; for (i = 1; i < argc; i++, argv++) { char *arg = *argv; if (*arg == '-') { if (!strcmp(arg, "--all")) { push_all = MATCH_REFS_ALL; continue; } if (!strcmp(arg, "--force")) { force_all = 1; continue; } if (!strcmp(arg, "--dry-run")) { dry_run = 1; continue; } if (!strcmp(arg, "--verbose")) { push_verbosely = 1; continue; } if (!strcmp(arg, "-d")) { delete_branch = 1; continue; } if (!strcmp(arg, "-D")) { delete_branch = 1; force_delete = 1; continue; } } if (!remote->url) { char *path = strstr(arg, "//"); remote->url = arg; remote->path_len = strlen(arg); if (path) { remote->path = strchr(path+2, '/'); if (remote->path) remote->path_len = strlen(remote->path); } continue; } refspec = argv; nr_refspec = argc - i; break; } #ifndef USE_CURL_MULTI die("git-push is not available for http/https repository when not compiled with USE_CURL_MULTI"); #endif if (!remote->url) usage(http_push_usage); if (delete_branch && nr_refspec != 1) die("You must specify only one branch name when deleting a remote branch"); memset(remote_dir_exists, -1, 256); http_init(NULL); no_pragma_header = curl_slist_append(no_pragma_header, "Pragma:"); if (remote->url && remote->url[strlen(remote->url)-1] != '/') { rewritten_url = xmalloc(strlen(remote->url)+2); strcpy(rewritten_url, remote->url); strcat(rewritten_url, "/"); remote->path = rewritten_url + (remote->path - remote->url); remote->path_len++; remote->url = rewritten_url; } /* Verify DAV compliance/lock support */ if (!locking_available()) { rc = 1; goto cleanup; } sigchain_push_common(remove_locks_on_signal); /* Check whether the remote has server info files */ remote->can_update_info_refs = 0; remote->has_info_refs = remote_exists("info/refs"); remote->has_info_packs = remote_exists("objects/info/packs"); if (remote->has_info_refs) { info_ref_lock = lock_remote("info/refs", LOCK_TIME); if (info_ref_lock) remote->can_update_info_refs = 1; else { fprintf(stderr, "Error: cannot lock existing info/refs\n"); rc = 1; goto cleanup; } } if (remote->has_info_packs) fetch_indices(); /* Get a list of all local and remote heads to validate refspecs */ get_local_heads(); fprintf(stderr, "Fetching remote heads...\n"); get_dav_remote_heads(); /* Remove a remote branch if -d or -D was specified */ if (delete_branch) { if (delete_remote_branch(refspec[0], force_delete) == -1) fprintf(stderr, "Unable to delete remote branch %s\n", refspec[0]); goto cleanup; } /* match them up */ if (!remote_tail) remote_tail = &remote_refs; if (match_refs(local_refs, remote_refs, &remote_tail, nr_refspec, (const char **) refspec, push_all)) { rc = -1; goto cleanup; } if (!remote_refs) { fprintf(stderr, "No refs in common and none specified; doing nothing.\n"); rc = 0; goto cleanup; } new_refs = 0; for (ref = remote_refs; ref; ref = ref->next) { char old_hex[60], *new_hex; const char *commit_argv[4]; int commit_argc; char *new_sha1_hex, *old_sha1_hex; if (!ref->peer_ref) continue; if (is_zero_sha1(ref->peer_ref->new_sha1)) { if (delete_remote_branch(ref->name, 1) == -1) { error("Could not remove %s", ref->name); rc = -4; } new_refs++; continue; } if (!hashcmp(ref->old_sha1, ref->peer_ref->new_sha1)) { if (push_verbosely || 1) fprintf(stderr, "'%s': up-to-date\n", ref->name); continue; } if (!force_all && !is_zero_sha1(ref->old_sha1) && !ref->force) { if (!has_sha1_file(ref->old_sha1) || !ref_newer(ref->peer_ref->new_sha1, ref->old_sha1)) { /* * We do not have the remote ref, or * we know that the remote ref is not * an ancestor of what we are trying to * push. Either way this can be losing * commits at the remote end and likely * we were not up to date to begin with. */ error("remote '%s' is not an ancestor of\n" "local '%s'.\n" "Maybe you are not up-to-date and " "need to pull first?", ref->name, ref->peer_ref->name); rc = -2; continue; } } hashcpy(ref->new_sha1, ref->peer_ref->new_sha1); new_refs++; strcpy(old_hex, sha1_to_hex(ref->old_sha1)); new_hex = sha1_to_hex(ref->new_sha1); fprintf(stderr, "updating '%s'", ref->name); if (strcmp(ref->name, ref->peer_ref->name)) fprintf(stderr, " using '%s'", ref->peer_ref->name); fprintf(stderr, "\n from %s\n to %s\n", old_hex, new_hex); if (dry_run) continue; /* Lock remote branch ref */ ref_lock = lock_remote(ref->name, LOCK_TIME); if (ref_lock == NULL) { fprintf(stderr, "Unable to lock remote branch %s\n", ref->name); rc = 1; continue; } /* Set up revision info for this refspec */ commit_argc = 3; new_sha1_hex = xstrdup(sha1_to_hex(ref->new_sha1)); old_sha1_hex = NULL; commit_argv[1] = "--objects"; commit_argv[2] = new_sha1_hex; if (!push_all && !is_zero_sha1(ref->old_sha1)) { old_sha1_hex = xmalloc(42); sprintf(old_sha1_hex, "^%s", sha1_to_hex(ref->old_sha1)); commit_argv[3] = old_sha1_hex; commit_argc++; } init_revisions(&revs, setup_git_directory()); setup_revisions(commit_argc, commit_argv, &revs, NULL); revs.edge_hint = 0; /* just in case */ free(new_sha1_hex); if (old_sha1_hex) { free(old_sha1_hex); commit_argv[1] = NULL; } /* Generate a list of objects that need to be pushed */ pushing = 0; if (prepare_revision_walk(&revs)) die("revision walk setup failed"); mark_edges_uninteresting(revs.commits, &revs, NULL); objects_to_send = get_delta(&revs, ref_lock); finish_all_active_slots(); /* Push missing objects to remote, this would be a convenient time to pack them first if appropriate. */ pushing = 1; if (objects_to_send) fprintf(stderr, " sending %d objects\n", objects_to_send); #ifdef USE_CURL_MULTI fill_active_slots(); add_fill_function(NULL, fill_active_slot); #endif do { finish_all_active_slots(); #ifdef USE_CURL_MULTI fill_active_slots(); #endif } while (request_queue_head && !aborted); /* Update the remote branch if all went well */ if (aborted || !update_remote(ref->new_sha1, ref_lock)) rc = 1; if (!rc) fprintf(stderr, " done\n"); unlock_remote(ref_lock); check_locks(); } /* Update remote server info if appropriate */ if (remote->has_info_refs && new_refs) { if (info_ref_lock && remote->can_update_info_refs) { fprintf(stderr, "Updating remote server info\n"); if (!dry_run) update_remote_info_refs(info_ref_lock); } else { fprintf(stderr, "Unable to update server info\n"); } } cleanup: free(rewritten_url); if (info_ref_lock) unlock_remote(info_ref_lock); free(remote); curl_slist_free_all(no_pragma_header); http_cleanup(); request = request_queue_head; while (request != NULL) { next_request = request->next; release_request(request); request = next_request; } return rc; }