diff options
Diffstat (limited to 'remote-curl.c')
| -rw-r--r-- | remote-curl.c | 1050 |
1 files changed, 1050 insertions, 0 deletions
diff --git a/remote-curl.c b/remote-curl.c new file mode 100644 index 0000000000..71fbbb694f --- /dev/null +++ b/remote-curl.c @@ -0,0 +1,1050 @@ +#include "cache.h" +#include "remote.h" +#include "strbuf.h" +#include "walker.h" +#include "http.h" +#include "exec_cmd.h" +#include "run-command.h" +#include "pkt-line.h" +#include "string-list.h" +#include "sideband.h" +#include "argv-array.h" +#include "credential.h" +#include "sha1-array.h" +#include "send-pack.h" + +static struct remote *remote; +/* always ends with a trailing slash */ +static struct strbuf url = STRBUF_INIT; + +struct options { + int verbosity; + unsigned long depth; + unsigned progress : 1, + check_self_contained_and_connected : 1, + cloning : 1, + update_shallow : 1, + followtags : 1, + dry_run : 1, + thin : 1, + /* One of the SEND_PACK_PUSH_CERT_* constants. */ + push_cert : 2; +}; +static struct options options; +static struct string_list cas_options = STRING_LIST_INIT_DUP; + +static int set_option(const char *name, const char *value) +{ + if (!strcmp(name, "verbosity")) { + char *end; + int v = strtol(value, &end, 10); + if (value == end || *end) + return -1; + options.verbosity = v; + return 0; + } + else if (!strcmp(name, "progress")) { + if (!strcmp(value, "true")) + options.progress = 1; + else if (!strcmp(value, "false")) + options.progress = 0; + else + return -1; + return 0; + } + else if (!strcmp(name, "depth")) { + char *end; + unsigned long v = strtoul(value, &end, 10); + if (value == end || *end) + return -1; + options.depth = v; + return 0; + } + else if (!strcmp(name, "followtags")) { + if (!strcmp(value, "true")) + options.followtags = 1; + else if (!strcmp(value, "false")) + options.followtags = 0; + else + return -1; + return 0; + } + else if (!strcmp(name, "dry-run")) { + if (!strcmp(value, "true")) + options.dry_run = 1; + else if (!strcmp(value, "false")) + options.dry_run = 0; + else + return -1; + return 0; + } + else if (!strcmp(name, "check-connectivity")) { + if (!strcmp(value, "true")) + options.check_self_contained_and_connected = 1; + else if (!strcmp(value, "false")) + options.check_self_contained_and_connected = 0; + else + return -1; + return 0; + } + else if (!strcmp(name, "cas")) { + struct strbuf val = STRBUF_INIT; + strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value); + string_list_append(&cas_options, val.buf); + strbuf_release(&val); + return 0; + } else if (!strcmp(name, "cloning")) { + if (!strcmp(value, "true")) + options.cloning = 1; + else if (!strcmp(value, "false")) + options.cloning = 0; + else + return -1; + return 0; + } else if (!strcmp(name, "update-shallow")) { + if (!strcmp(value, "true")) + options.update_shallow = 1; + else if (!strcmp(value, "false")) + options.update_shallow = 0; + else + return -1; + return 0; + } else if (!strcmp(name, "pushcert")) { + if (!strcmp(value, "true")) + options.push_cert = SEND_PACK_PUSH_CERT_ALWAYS; + else if (!strcmp(value, "false")) + options.push_cert = SEND_PACK_PUSH_CERT_NEVER; + else if (!strcmp(value, "if-asked")) + options.push_cert = SEND_PACK_PUSH_CERT_IF_ASKED; + else + return -1; + return 0; + } else { + return 1 /* unsupported */; + } +} + +struct discovery { + const char *service; + char *buf_alloc; + char *buf; + size_t len; + struct ref *refs; + struct sha1_array shallow; + unsigned proto_git : 1; +}; +static struct discovery *last_discovery; + +static struct ref *parse_git_refs(struct discovery *heads, int for_push) +{ + struct ref *list = NULL; + get_remote_heads(-1, heads->buf, heads->len, &list, + for_push ? REF_NORMAL : 0, NULL, &heads->shallow); + return list; +} + +static struct ref *parse_info_refs(struct discovery *heads) +{ + char *data, *start, *mid; + char *ref_name; + int i = 0; + + struct ref *refs = NULL; + struct ref *ref = NULL; + struct ref *last_ref = NULL; + + data = heads->buf; + start = NULL; + mid = data; + while (i < heads->len) { + if (!start) { + start = &data[i]; + } + if (data[i] == '\t') + mid = &data[i]; + if (data[i] == '\n') { + if (mid - start != 40) + die("%sinfo/refs not valid: is this a git repository?", + url.buf); + data[i] = 0; + ref_name = mid + 1; + ref = xmalloc(sizeof(struct ref) + + strlen(ref_name) + 1); + memset(ref, 0, sizeof(struct ref)); + strcpy(ref->name, ref_name); + get_sha1_hex(start, ref->old_sha1); + if (!refs) + refs = ref; + if (last_ref) + last_ref->next = ref; + last_ref = ref; + start = NULL; + } + i++; + } + + ref = alloc_ref("HEAD"); + if (!http_fetch_ref(url.buf, ref) && + !resolve_remote_symref(ref, refs)) { + ref->next = refs; + refs = ref; + } else { + free(ref); + } + + return refs; +} + +static void free_discovery(struct discovery *d) +{ + if (d) { + if (d == last_discovery) + last_discovery = NULL; + free(d->shallow.sha1); + free(d->buf_alloc); + free_refs(d->refs); + free(d); + } +} + +static int show_http_message(struct strbuf *type, struct strbuf *charset, + struct strbuf *msg) +{ + const char *p, *eol; + + /* + * We only show text/plain parts, as other types are likely + * to be ugly to look at on the user's terminal. + */ + if (strcmp(type->buf, "text/plain")) + return -1; + if (charset->len) + strbuf_reencode(msg, charset->buf, get_log_output_encoding()); + + strbuf_trim(msg); + if (!msg->len) + return -1; + + p = msg->buf; + do { + eol = strchrnul(p, '\n'); + fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p); + p = eol + 1; + } while(*eol); + return 0; +} + +static struct discovery *discover_refs(const char *service, int for_push) +{ + struct strbuf exp = STRBUF_INIT; + struct strbuf type = STRBUF_INIT; + struct strbuf charset = STRBUF_INIT; + struct strbuf buffer = STRBUF_INIT; + struct strbuf refs_url = STRBUF_INIT; + struct strbuf effective_url = STRBUF_INIT; + struct discovery *last = last_discovery; + int http_ret, maybe_smart = 0; + struct http_get_options options; + + if (last && !strcmp(service, last->service)) + return last; + free_discovery(last); + + strbuf_addf(&refs_url, "%sinfo/refs", url.buf); + if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) && + git_env_bool("GIT_SMART_HTTP", 1)) { + maybe_smart = 1; + if (!strchr(url.buf, '?')) + strbuf_addch(&refs_url, '?'); + else + strbuf_addch(&refs_url, '&'); + strbuf_addf(&refs_url, "service=%s", service); + } + + memset(&options, 0, sizeof(options)); + options.content_type = &type; + options.charset = &charset; + options.effective_url = &effective_url; + options.base_url = &url; + options.no_cache = 1; + options.keep_error = 1; + + http_ret = http_get_strbuf(refs_url.buf, &buffer, &options); + switch (http_ret) { + case HTTP_OK: + break; + case HTTP_MISSING_TARGET: + show_http_message(&type, &charset, &buffer); + die("repository '%s' not found", url.buf); + case HTTP_NOAUTH: + show_http_message(&type, &charset, &buffer); + die("Authentication failed for '%s'", url.buf); + default: + show_http_message(&type, &charset, &buffer); + die("unable to access '%s': %s", url.buf, curl_errorstr); + } + + last= xcalloc(1, sizeof(*last_discovery)); + last->service = service; + last->buf_alloc = strbuf_detach(&buffer, &last->len); + last->buf = last->buf_alloc; + + strbuf_addf(&exp, "application/x-%s-advertisement", service); + if (maybe_smart && + (5 <= last->len && last->buf[4] == '#') && + !strbuf_cmp(&exp, &type)) { + char *line; + + /* + * smart HTTP response; validate that the service + * pkt-line matches our request. + */ + line = packet_read_line_buf(&last->buf, &last->len, NULL); + + strbuf_reset(&exp); + strbuf_addf(&exp, "# service=%s", service); + if (strcmp(line, exp.buf)) + die("invalid server response; got '%s'", line); + strbuf_release(&exp); + + /* The header can include additional metadata lines, up + * until a packet flush marker. Ignore these now, but + * in the future we might start to scan them. + */ + while (packet_read_line_buf(&last->buf, &last->len, NULL)) + ; + + last->proto_git = 1; + } + + if (last->proto_git) + last->refs = parse_git_refs(last, for_push); + else + last->refs = parse_info_refs(last); + + strbuf_release(&refs_url); + strbuf_release(&exp); + strbuf_release(&type); + strbuf_release(&charset); + strbuf_release(&effective_url); + strbuf_release(&buffer); + last_discovery = last; + return last; +} + +static struct ref *get_refs(int for_push) +{ + struct discovery *heads; + + if (for_push) + heads = discover_refs("git-receive-pack", for_push); + else + heads = discover_refs("git-upload-pack", for_push); + + return heads->refs; +} + +static void output_refs(struct ref *refs) +{ + struct ref *posn; + for (posn = refs; posn; posn = posn->next) { + if (posn->symref) + printf("@%s %s\n", posn->symref, posn->name); + else + printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name); + } + printf("\n"); + fflush(stdout); +} + +struct rpc_state { + const char *service_name; + const char **argv; + struct strbuf *stdin_preamble; + char *service_url; + char *hdr_content_type; + char *hdr_accept; + char *buf; + size_t alloc; + size_t len; + size_t pos; + int in; + int out; + struct strbuf result; + unsigned gzip_request : 1; + unsigned initial_buffer : 1; +}; + +static size_t rpc_out(void *ptr, size_t eltsize, + size_t nmemb, void *buffer_) +{ + size_t max = eltsize * nmemb; + struct rpc_state *rpc = buffer_; + size_t avail = rpc->len - rpc->pos; + + if (!avail) { + rpc->initial_buffer = 0; + avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0); + if (!avail) + return 0; + rpc->pos = 0; + rpc->len = avail; + } + + if (max < avail) + avail = max; + memcpy(ptr, rpc->buf + rpc->pos, avail); + rpc->pos += avail; + return avail; +} + +#ifndef NO_CURL_IOCTL +static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp) +{ + struct rpc_state *rpc = clientp; + + switch (cmd) { + case CURLIOCMD_NOP: + return CURLIOE_OK; + + case CURLIOCMD_RESTARTREAD: + if (rpc->initial_buffer) { + rpc->pos = 0; + return CURLIOE_OK; + } + error("unable to rewind rpc post data - try increasing http.postBuffer"); + return CURLIOE_FAILRESTART; + + default: + return CURLIOE_UNKNOWNCMD; + } +} +#endif + +static size_t rpc_in(char *ptr, size_t eltsize, + size_t nmemb, void *buffer_) +{ + size_t size = eltsize * nmemb; + struct rpc_state *rpc = buffer_; + write_or_die(rpc->in, ptr, size); + return size; +} + +static int run_slot(struct active_request_slot *slot, + struct slot_results *results) +{ + int err; + struct slot_results results_buf; + + if (!results) + results = &results_buf; + + err = run_one_slot(slot, results); + + if (err != HTTP_OK && err != HTTP_REAUTH) { + error("RPC failed; result=%d, HTTP code = %ld", + results->curl_result, results->http_code); + } + + return err; +} + +static int probe_rpc(struct rpc_state *rpc, struct slot_results *results) +{ + struct active_request_slot *slot; + struct curl_slist *headers = NULL; + struct strbuf buf = STRBUF_INIT; + int err; + + slot = get_active_slot(); + + headers = curl_slist_append(headers, rpc->hdr_content_type); + headers = curl_slist_append(headers, rpc->hdr_accept); + + curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); + curl_easy_setopt(slot->curl, CURLOPT_POST, 1); + curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url); + curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL); + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000"); + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4); + curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); + curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer); + curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf); + + err = run_slot(slot, results); + + curl_slist_free_all(headers); + strbuf_release(&buf); + return err; +} + +static int post_rpc(struct rpc_state *rpc) +{ + struct active_request_slot *slot; + struct curl_slist *headers = NULL; + int use_gzip = rpc->gzip_request; + char *gzip_body = NULL; + size_t gzip_size = 0; + int err, large_request = 0; + int needs_100_continue = 0; + + /* Try to load the entire request, if we can fit it into the + * allocated buffer space we can use HTTP/1.0 and avoid the + * chunked encoding mess. + */ + while (1) { + size_t left = rpc->alloc - rpc->len; + char *buf = rpc->buf + rpc->len; + int n; + + if (left < LARGE_PACKET_MAX) { + large_request = 1; + use_gzip = 0; + break; + } + + n = packet_read(rpc->out, NULL, NULL, buf, left, 0); + if (!n) + break; + rpc->len += n; + } + + if (large_request) { + struct slot_results results; + + do { + err = probe_rpc(rpc, &results); + if (err == HTTP_REAUTH) + credential_fill(&http_auth); + } while (err == HTTP_REAUTH); + if (err != HTTP_OK) + return -1; + + if (results.auth_avail & CURLAUTH_GSSNEGOTIATE) + needs_100_continue = 1; + } + + headers = curl_slist_append(headers, rpc->hdr_content_type); + headers = curl_slist_append(headers, rpc->hdr_accept); + headers = curl_slist_append(headers, needs_100_continue ? + "Expect: 100-continue" : "Expect:"); + +retry: + slot = get_active_slot(); + + curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0); + curl_easy_setopt(slot->curl, CURLOPT_POST, 1); + curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url); + curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip"); + + if (large_request) { + /* The request body is large and the size cannot be predicted. + * We must use chunked encoding to send it. + */ + headers = curl_slist_append(headers, "Transfer-Encoding: chunked"); + rpc->initial_buffer = 1; + curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out); + curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc); +#ifndef NO_CURL_IOCTL + curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl); + curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc); +#endif + if (options.verbosity > 1) { + fprintf(stderr, "POST %s (chunked)\n", rpc->service_name); + fflush(stderr); + } + + } else if (gzip_body) { + /* + * If we are looping to retry authentication, then the previous + * run will have set up the headers and gzip buffer already, + * and we just need to send it. + */ + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body); + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size); + + } else if (use_gzip && 1024 < rpc->len) { + /* The client backend isn't giving us compressed data so + * we can try to deflate it ourselves, this may save on. + * the transfer time. + */ + git_zstream stream; + int ret; + + git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION); + gzip_size = git_deflate_bound(&stream, rpc->len); + gzip_body = xmalloc(gzip_size); + + stream.next_in = (unsigned char *)rpc->buf; + stream.avail_in = rpc->len; + stream.next_out = (unsigned char *)gzip_body; + stream.avail_out = gzip_size; + + ret = git_deflate(&stream, Z_FINISH); + if (ret != Z_STREAM_END) + die("cannot deflate request; zlib deflate error %d", ret); + + ret = git_deflate_end_gently(&stream); + if (ret != Z_OK) + die("cannot deflate request; zlib end error %d", ret); + + gzip_size = stream.total_out; + + headers = curl_slist_append(headers, "Content-Encoding: gzip"); + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body); + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size); + + if (options.verbosity > 1) { + fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n", + rpc->service_name, + (unsigned long)rpc->len, (unsigned long)gzip_size); + fflush(stderr); + } + } else { + /* We know the complete request size in advance, use the + * more normal Content-Length approach. + */ + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf); + curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len); + if (options.verbosity > 1) { + fprintf(stderr, "POST %s (%lu bytes)\n", + rpc->service_name, (unsigned long)rpc->len); + fflush(stderr); + } + } + + curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers); + curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in); + curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc); + + err = run_slot(slot, NULL); + if (err == HTTP_REAUTH && !large_request) { + credential_fill(&http_auth); + goto retry; + } + if (err != HTTP_OK) + err = -1; + + curl_slist_free_all(headers); + free(gzip_body); + return err; +} + +static int rpc_service(struct rpc_state *rpc, struct discovery *heads) +{ + const char *svc = rpc->service_name; + struct strbuf buf = STRBUF_INIT; + struct strbuf *preamble = rpc->stdin_preamble; + struct child_process client = CHILD_PROCESS_INIT; + int err = 0; + + client.in = -1; + client.out = -1; + client.git_cmd = 1; + client.argv = rpc->argv; + if (start_command(&client)) + exit(1); + if (preamble) + write_or_die(client.in, preamble->buf, preamble->len); + if (heads) + write_or_die(client.in, heads->buf, heads->len); + + rpc->alloc = http_post_buffer; + rpc->buf = xmalloc(rpc->alloc); + rpc->in = client.in; + rpc->out = client.out; + strbuf_init(&rpc->result, 0); + + strbuf_addf(&buf, "%s%s", url.buf, svc); + rpc->service_url = strbuf_detach(&buf, NULL); + + strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc); + rpc->hdr_content_type = strbuf_detach(&buf, NULL); + + strbuf_addf(&buf, "Accept: application/x-%s-result", svc); + rpc->hdr_accept = strbuf_detach(&buf, NULL); + + while (!err) { + int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0); + if (!n) + break; + rpc->pos = 0; + rpc->len = n; + err |= post_rpc(rpc); + } + + close(client.in); + client.in = -1; + if (!err) { + strbuf_read(&rpc->result, client.out, 0); + } else { + char buf[4096]; + for (;;) + if (xread(client.out, buf, sizeof(buf)) <= 0) + break; + } + + close(client.out); + client.out = -1; + + err |= finish_command(&client); + free(rpc->service_url); + free(rpc->hdr_content_type); + free(rpc->hdr_accept); + free(rpc->buf); + strbuf_release(&buf); + return err; +} + +static int fetch_dumb(int nr_heads, struct ref **to_fetch) +{ + struct walker *walker; + char **targets = xmalloc(nr_heads * sizeof(char*)); + int ret, i; + + if (options.depth) + die("dumb http transport does not support --depth"); + for (i = 0; i < nr_heads; i++) + targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1)); + + walker = get_http_walker(url.buf); + walker->get_all = 1; + walker->get_tree = 1; + walker->get_history = 1; + walker->get_verbosely = options.verbosity >= 3; + walker->get_recover = 0; + ret = walker_fetch(walker, nr_heads, targets, NULL, NULL); + walker_free(walker); + + for (i = 0; i < nr_heads; i++) + free(targets[i]); + free(targets); + + return ret ? error("fetch failed.") : 0; +} + +static int fetch_git(struct discovery *heads, + int nr_heads, struct ref **to_fetch) +{ + struct rpc_state rpc; + struct strbuf preamble = STRBUF_INIT; + char *depth_arg = NULL; + int argc = 0, i, err; + const char *argv[17]; + + argv[argc++] = "fetch-pack"; + argv[argc++] = "--stateless-rpc"; + argv[argc++] = "--stdin"; + argv[argc++] = "--lock-pack"; + if (options.followtags) + argv[argc++] = "--include-tag"; + if (options.thin) + argv[argc++] = "--thin"; + if (options.verbosity >= 3) { + argv[argc++] = "-v"; + argv[argc++] = "-v"; + } + if (options.check_self_contained_and_connected) + argv[argc++] = "--check-self-contained-and-connected"; + if (options.cloning) + argv[argc++] = "--cloning"; + if (options.update_shallow) + argv[argc++] = "--update-shallow"; + if (!options.progress) + argv[argc++] = "--no-progress"; + if (options.depth) { + struct strbuf buf = STRBUF_INIT; + strbuf_addf(&buf, "--depth=%lu", options.depth); + depth_arg = strbuf_detach(&buf, NULL); + argv[argc++] = depth_arg; + } + argv[argc++] = url.buf; + argv[argc++] = NULL; + + for (i = 0; i < nr_heads; i++) { + struct ref *ref = to_fetch[i]; + if (!*ref->name) + die("cannot fetch by sha1 over smart http"); + packet_buf_write(&preamble, "%s %s\n", + sha1_to_hex(ref->old_sha1), ref->name); + } + packet_buf_flush(&preamble); + + memset(&rpc, 0, sizeof(rpc)); + rpc.service_name = "git-upload-pack", + rpc.argv = argv; + rpc.stdin_preamble = &preamble; + rpc.gzip_request = 1; + + err = rpc_service(&rpc, heads); + if (rpc.result.len) + write_or_die(1, rpc.result.buf, rpc.result.len); + strbuf_release(&rpc.result); + strbuf_release(&preamble); + free(depth_arg); + return err; +} + +static int fetch(int nr_heads, struct ref **to_fetch) +{ + struct discovery *d = discover_refs("git-upload-pack", 0); + if (d->proto_git) + return fetch_git(d, nr_heads, to_fetch); + else + return fetch_dumb(nr_heads, to_fetch); +} + +static void parse_fetch(struct strbuf *buf) +{ + struct ref **to_fetch = NULL; + struct ref *list_head = NULL; + struct ref **list = &list_head; + int alloc_heads = 0, nr_heads = 0; + + do { + const char *p; + if (skip_prefix(buf->buf, "fetch ", &p)) { + const char *name; + struct ref *ref; + unsigned char old_sha1[20]; + + if (strlen(p) < 40 || get_sha1_hex(p, old_sha1)) + die("protocol error: expected sha/ref, got %s'", p); + if (p[40] == ' ') + name = p + 41; + else if (!p[40]) + name = ""; + else + die("protocol error: expected sha/ref, got %s'", p); + + ref = alloc_ref(name); + hashcpy(ref->old_sha1, old_sha1); + + *list = ref; + list = &ref->next; + + ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads); + to_fetch[nr_heads++] = ref; + } + else + die("http transport does not support %s", buf->buf); + + strbuf_reset(buf); + if (strbuf_getline(buf, stdin, '\n') == EOF) + return; + if (!*buf->buf) + break; + } while (1); + + if (fetch(nr_heads, to_fetch)) + exit(128); /* error already reported */ + free_refs(list_head); + free(to_fetch); + + printf("\n"); + fflush(stdout); + strbuf_reset(buf); +} + +static int push_dav(int nr_spec, char **specs) +{ + const char **argv = xmalloc((10 + nr_spec) * sizeof(char*)); + int argc = 0, i; + + argv[argc++] = "http-push"; + argv[argc++] = "--helper-status"; + if (options.dry_run) + argv[argc++] = "--dry-run"; + if (options.verbosity > 1) + argv[argc++] = "--verbose"; + argv[argc++] = url.buf; + for (i = 0; i < nr_spec; i++) + argv[argc++] = specs[i]; + argv[argc++] = NULL; + + if (run_command_v_opt(argv, RUN_GIT_CMD)) + die("git-%s failed", argv[0]); + free(argv); + return 0; +} + +static int push_git(struct discovery *heads, int nr_spec, char **specs) +{ + struct rpc_state rpc; + int i, err; + struct argv_array args; + struct string_list_item *cas_option; + struct strbuf preamble = STRBUF_INIT; + + argv_array_init(&args); + argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status", + NULL); + + if (options.thin) + argv_array_push(&args, "--thin"); + if (options.dry_run) + argv_array_push(&args, "--dry-run"); + if (options.push_cert == SEND_PACK_PUSH_CERT_ALWAYS) + argv_array_push(&args, "--signed=yes"); + else if (options.push_cert == SEND_PACK_PUSH_CERT_IF_ASKED) + argv_array_push(&args, "--signed=if-asked"); + if (options.verbosity == 0) + argv_array_push(&args, "--quiet"); + else if (options.verbosity > 1) + argv_array_push(&args, "--verbose"); + argv_array_push(&args, options.progress ? "--progress" : "--no-progress"); + for_each_string_list_item(cas_option, &cas_options) + argv_array_push(&args, cas_option->string); + argv_array_push(&args, url.buf); + + argv_array_push(&args, "--stdin"); + for (i = 0; i < nr_spec; i++) + packet_buf_write(&preamble, "%s\n", specs[i]); + packet_buf_flush(&preamble); + + memset(&rpc, 0, sizeof(rpc)); + rpc.service_name = "git-receive-pack", + rpc.argv = args.argv; + rpc.stdin_preamble = &preamble; + + err = rpc_service(&rpc, heads); + if (rpc.result.len) + write_or_die(1, rpc.result.buf, rpc.result.len); + strbuf_release(&rpc.result); + strbuf_release(&preamble); + argv_array_clear(&args); + return err; +} + +static int push(int nr_spec, char **specs) +{ + struct discovery *heads = discover_refs("git-receive-pack", 1); + int ret; + + if (heads->proto_git) + ret = push_git(heads, nr_spec, specs); + else + ret = push_dav(nr_spec, specs); + free_discovery(heads); + return ret; +} + +static void parse_push(struct strbuf *buf) +{ + char **specs = NULL; + int alloc_spec = 0, nr_spec = 0, i, ret; + + do { + if (starts_with(buf->buf, "push ")) { + ALLOC_GROW(specs, nr_spec + 1, alloc_spec); + specs[nr_spec++] = xstrdup(buf->buf + 5); + } + else + die("http transport does not support %s", buf->buf); + + strbuf_reset(buf); + if (strbuf_getline(buf, stdin, '\n') == EOF) + goto free_specs; + if (!*buf->buf) + break; + } while (1); + + ret = push(nr_spec, specs); + printf("\n"); + fflush(stdout); + + if (ret) + exit(128); /* error already reported */ + + free_specs: + for (i = 0; i < nr_spec; i++) + free(specs[i]); + free(specs); +} + +int main(int argc, const char **argv) +{ + struct strbuf buf = STRBUF_INIT; + int nongit; + + git_setup_gettext(); + + git_extract_argv0_path(argv[0]); + setup_git_directory_gently(&nongit); + if (argc < 2) { + error("remote-curl: usage: git remote-curl <remote> [<url>]"); + return 1; + } + + options.verbosity = 1; + options.progress = !!isatty(2); + options.thin = 1; + + remote = remote_get(argv[1]); + + if (argc > 2) { + end_url_with_slash(&url, argv[2]); + } else { + end_url_with_slash(&url, remote->url[0]); + } + + http_init(remote, url.buf, 0); + + do { + const char *arg; + + if (strbuf_getline(&buf, stdin, '\n') == EOF) { + if (ferror(stdin)) + error("remote-curl: error reading command stream from git"); + return 1; + } + if (buf.len == 0) + break; + if (starts_with(buf.buf, "fetch ")) { + if (nongit) + die("remote-curl: fetch attempted without a local repo"); + parse_fetch(&buf); + + } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) { + int for_push = !!strstr(buf.buf + 4, "for-push"); + output_refs(get_refs(for_push)); + + } else if (starts_with(buf.buf, "push ")) { + parse_push(&buf); + + } else if (skip_prefix(buf.buf, "option ", &arg)) { + char *value = strchr(arg, ' '); + int result; + + if (value) + *value++ = '\0'; + else + value = "true"; + + result = set_option(arg, value); + if (!result) + printf("ok\n"); + else if (result < 0) + printf("error invalid value\n"); + else + printf("unsupported\n"); + fflush(stdout); + + } else if (!strcmp(buf.buf, "capabilities")) { + printf("fetch\n"); + printf("option\n"); + printf("push\n"); + printf("check-connectivity\n"); + printf("\n"); + fflush(stdout); + } else { + error("remote-curl: unknown command '%s' from git", buf.buf); + return 1; + } + strbuf_reset(&buf); + } while (1); + + http_cleanup(); + + return 0; +} |