Merge branch 'jk/sha1-file-reduce-useless-warnings' into maint
[git.git] / remote-curl.c
blobaf7b6786dc091035e3216c710dbc0ebc3c234a8a
1 #include "cache.h"
2 #include "remote.h"
3 #include "strbuf.h"
4 #include "walker.h"
5 #include "http.h"
6 #include "exec_cmd.h"
7 #include "run-command.h"
8 #include "pkt-line.h"
9 #include "string-list.h"
10 #include "sideband.h"
11 #include "argv-array.h"
12 #include "credential.h"
13 #include "sha1-array.h"
15 static struct remote *remote;
16 /* always ends with a trailing slash */
17 static struct strbuf url = STRBUF_INIT;
19 struct options {
20 int verbosity;
21 unsigned long depth;
22 unsigned progress : 1,
23 check_self_contained_and_connected : 1,
24 cloning : 1,
25 update_shallow : 1,
26 followtags : 1,
27 dry_run : 1,
28 thin : 1,
29 push_cert : 1;
31 static struct options options;
32 static struct string_list cas_options = STRING_LIST_INIT_DUP;
34 static int set_option(const char *name, const char *value)
36 if (!strcmp(name, "verbosity")) {
37 char *end;
38 int v = strtol(value, &end, 10);
39 if (value == end || *end)
40 return -1;
41 options.verbosity = v;
42 return 0;
44 else if (!strcmp(name, "progress")) {
45 if (!strcmp(value, "true"))
46 options.progress = 1;
47 else if (!strcmp(value, "false"))
48 options.progress = 0;
49 else
50 return -1;
51 return 0;
53 else if (!strcmp(name, "depth")) {
54 char *end;
55 unsigned long v = strtoul(value, &end, 10);
56 if (value == end || *end)
57 return -1;
58 options.depth = v;
59 return 0;
61 else if (!strcmp(name, "followtags")) {
62 if (!strcmp(value, "true"))
63 options.followtags = 1;
64 else if (!strcmp(value, "false"))
65 options.followtags = 0;
66 else
67 return -1;
68 return 0;
70 else if (!strcmp(name, "dry-run")) {
71 if (!strcmp(value, "true"))
72 options.dry_run = 1;
73 else if (!strcmp(value, "false"))
74 options.dry_run = 0;
75 else
76 return -1;
77 return 0;
79 else if (!strcmp(name, "check-connectivity")) {
80 if (!strcmp(value, "true"))
81 options.check_self_contained_and_connected = 1;
82 else if (!strcmp(value, "false"))
83 options.check_self_contained_and_connected = 0;
84 else
85 return -1;
86 return 0;
88 else if (!strcmp(name, "cas")) {
89 struct strbuf val = STRBUF_INIT;
90 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
91 string_list_append(&cas_options, val.buf);
92 strbuf_release(&val);
93 return 0;
94 } else if (!strcmp(name, "cloning")) {
95 if (!strcmp(value, "true"))
96 options.cloning = 1;
97 else if (!strcmp(value, "false"))
98 options.cloning = 0;
99 else
100 return -1;
101 return 0;
102 } else if (!strcmp(name, "update-shallow")) {
103 if (!strcmp(value, "true"))
104 options.update_shallow = 1;
105 else if (!strcmp(value, "false"))
106 options.update_shallow = 0;
107 else
108 return -1;
109 return 0;
110 } else if (!strcmp(name, "pushcert")) {
111 if (!strcmp(value, "true"))
112 options.push_cert = 1;
113 else if (!strcmp(value, "false"))
114 options.push_cert = 0;
115 else
116 return -1;
117 return 0;
118 } else {
119 return 1 /* unsupported */;
123 struct discovery {
124 const char *service;
125 char *buf_alloc;
126 char *buf;
127 size_t len;
128 struct ref *refs;
129 struct sha1_array shallow;
130 unsigned proto_git : 1;
132 static struct discovery *last_discovery;
134 static struct ref *parse_git_refs(struct discovery *heads, int for_push)
136 struct ref *list = NULL;
137 get_remote_heads(-1, heads->buf, heads->len, &list,
138 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
139 return list;
142 static struct ref *parse_info_refs(struct discovery *heads)
144 char *data, *start, *mid;
145 char *ref_name;
146 int i = 0;
148 struct ref *refs = NULL;
149 struct ref *ref = NULL;
150 struct ref *last_ref = NULL;
152 data = heads->buf;
153 start = NULL;
154 mid = data;
155 while (i < heads->len) {
156 if (!start) {
157 start = &data[i];
159 if (data[i] == '\t')
160 mid = &data[i];
161 if (data[i] == '\n') {
162 if (mid - start != 40)
163 die("%sinfo/refs not valid: is this a git repository?",
164 url.buf);
165 data[i] = 0;
166 ref_name = mid + 1;
167 ref = xmalloc(sizeof(struct ref) +
168 strlen(ref_name) + 1);
169 memset(ref, 0, sizeof(struct ref));
170 strcpy(ref->name, ref_name);
171 get_sha1_hex(start, ref->old_sha1);
172 if (!refs)
173 refs = ref;
174 if (last_ref)
175 last_ref->next = ref;
176 last_ref = ref;
177 start = NULL;
179 i++;
182 ref = alloc_ref("HEAD");
183 if (!http_fetch_ref(url.buf, ref) &&
184 !resolve_remote_symref(ref, refs)) {
185 ref->next = refs;
186 refs = ref;
187 } else {
188 free(ref);
191 return refs;
194 static void free_discovery(struct discovery *d)
196 if (d) {
197 if (d == last_discovery)
198 last_discovery = NULL;
199 free(d->shallow.sha1);
200 free(d->buf_alloc);
201 free_refs(d->refs);
202 free(d);
206 static int show_http_message(struct strbuf *type, struct strbuf *charset,
207 struct strbuf *msg)
209 const char *p, *eol;
212 * We only show text/plain parts, as other types are likely
213 * to be ugly to look at on the user's terminal.
215 if (strcmp(type->buf, "text/plain"))
216 return -1;
217 if (charset->len)
218 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
220 strbuf_trim(msg);
221 if (!msg->len)
222 return -1;
224 p = msg->buf;
225 do {
226 eol = strchrnul(p, '\n');
227 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
228 p = eol + 1;
229 } while(*eol);
230 return 0;
233 static struct discovery *discover_refs(const char *service, int for_push)
235 struct strbuf exp = STRBUF_INIT;
236 struct strbuf type = STRBUF_INIT;
237 struct strbuf charset = STRBUF_INIT;
238 struct strbuf buffer = STRBUF_INIT;
239 struct strbuf refs_url = STRBUF_INIT;
240 struct strbuf effective_url = STRBUF_INIT;
241 struct discovery *last = last_discovery;
242 int http_ret, maybe_smart = 0;
243 struct http_get_options options;
245 if (last && !strcmp(service, last->service))
246 return last;
247 free_discovery(last);
249 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
250 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
251 git_env_bool("GIT_SMART_HTTP", 1)) {
252 maybe_smart = 1;
253 if (!strchr(url.buf, '?'))
254 strbuf_addch(&refs_url, '?');
255 else
256 strbuf_addch(&refs_url, '&');
257 strbuf_addf(&refs_url, "service=%s", service);
260 memset(&options, 0, sizeof(options));
261 options.content_type = &type;
262 options.charset = &charset;
263 options.effective_url = &effective_url;
264 options.base_url = &url;
265 options.no_cache = 1;
266 options.keep_error = 1;
268 http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
269 switch (http_ret) {
270 case HTTP_OK:
271 break;
272 case HTTP_MISSING_TARGET:
273 show_http_message(&type, &charset, &buffer);
274 die("repository '%s' not found", url.buf);
275 case HTTP_NOAUTH:
276 show_http_message(&type, &charset, &buffer);
277 die("Authentication failed for '%s'", url.buf);
278 default:
279 show_http_message(&type, &charset, &buffer);
280 die("unable to access '%s': %s", url.buf, curl_errorstr);
283 last= xcalloc(1, sizeof(*last_discovery));
284 last->service = service;
285 last->buf_alloc = strbuf_detach(&buffer, &last->len);
286 last->buf = last->buf_alloc;
288 strbuf_addf(&exp, "application/x-%s-advertisement", service);
289 if (maybe_smart &&
290 (5 <= last->len && last->buf[4] == '#') &&
291 !strbuf_cmp(&exp, &type)) {
292 char *line;
295 * smart HTTP response; validate that the service
296 * pkt-line matches our request.
298 line = packet_read_line_buf(&last->buf, &last->len, NULL);
300 strbuf_reset(&exp);
301 strbuf_addf(&exp, "# service=%s", service);
302 if (strcmp(line, exp.buf))
303 die("invalid server response; got '%s'", line);
304 strbuf_release(&exp);
306 /* The header can include additional metadata lines, up
307 * until a packet flush marker. Ignore these now, but
308 * in the future we might start to scan them.
310 while (packet_read_line_buf(&last->buf, &last->len, NULL))
313 last->proto_git = 1;
316 if (last->proto_git)
317 last->refs = parse_git_refs(last, for_push);
318 else
319 last->refs = parse_info_refs(last);
321 strbuf_release(&refs_url);
322 strbuf_release(&exp);
323 strbuf_release(&type);
324 strbuf_release(&charset);
325 strbuf_release(&effective_url);
326 strbuf_release(&buffer);
327 last_discovery = last;
328 return last;
331 static struct ref *get_refs(int for_push)
333 struct discovery *heads;
335 if (for_push)
336 heads = discover_refs("git-receive-pack", for_push);
337 else
338 heads = discover_refs("git-upload-pack", for_push);
340 return heads->refs;
343 static void output_refs(struct ref *refs)
345 struct ref *posn;
346 for (posn = refs; posn; posn = posn->next) {
347 if (posn->symref)
348 printf("@%s %s\n", posn->symref, posn->name);
349 else
350 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
352 printf("\n");
353 fflush(stdout);
356 struct rpc_state {
357 const char *service_name;
358 const char **argv;
359 struct strbuf *stdin_preamble;
360 char *service_url;
361 char *hdr_content_type;
362 char *hdr_accept;
363 char *buf;
364 size_t alloc;
365 size_t len;
366 size_t pos;
367 int in;
368 int out;
369 struct strbuf result;
370 unsigned gzip_request : 1;
371 unsigned initial_buffer : 1;
374 static size_t rpc_out(void *ptr, size_t eltsize,
375 size_t nmemb, void *buffer_)
377 size_t max = eltsize * nmemb;
378 struct rpc_state *rpc = buffer_;
379 size_t avail = rpc->len - rpc->pos;
381 if (!avail) {
382 rpc->initial_buffer = 0;
383 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
384 if (!avail)
385 return 0;
386 rpc->pos = 0;
387 rpc->len = avail;
390 if (max < avail)
391 avail = max;
392 memcpy(ptr, rpc->buf + rpc->pos, avail);
393 rpc->pos += avail;
394 return avail;
397 #ifndef NO_CURL_IOCTL
398 static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
400 struct rpc_state *rpc = clientp;
402 switch (cmd) {
403 case CURLIOCMD_NOP:
404 return CURLIOE_OK;
406 case CURLIOCMD_RESTARTREAD:
407 if (rpc->initial_buffer) {
408 rpc->pos = 0;
409 return CURLIOE_OK;
411 error("unable to rewind rpc post data - try increasing http.postBuffer");
412 return CURLIOE_FAILRESTART;
414 default:
415 return CURLIOE_UNKNOWNCMD;
418 #endif
420 static size_t rpc_in(char *ptr, size_t eltsize,
421 size_t nmemb, void *buffer_)
423 size_t size = eltsize * nmemb;
424 struct rpc_state *rpc = buffer_;
425 write_or_die(rpc->in, ptr, size);
426 return size;
429 static int run_slot(struct active_request_slot *slot,
430 struct slot_results *results)
432 int err;
433 struct slot_results results_buf;
435 if (!results)
436 results = &results_buf;
438 err = run_one_slot(slot, results);
440 if (err != HTTP_OK && err != HTTP_REAUTH) {
441 error("RPC failed; result=%d, HTTP code = %ld",
442 results->curl_result, results->http_code);
445 return err;
448 static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
450 struct active_request_slot *slot;
451 struct curl_slist *headers = NULL;
452 struct strbuf buf = STRBUF_INIT;
453 int err;
455 slot = get_active_slot();
457 headers = curl_slist_append(headers, rpc->hdr_content_type);
458 headers = curl_slist_append(headers, rpc->hdr_accept);
460 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
461 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
462 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
463 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
464 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
465 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
466 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
467 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
468 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
470 err = run_slot(slot, results);
472 curl_slist_free_all(headers);
473 strbuf_release(&buf);
474 return err;
477 static int post_rpc(struct rpc_state *rpc)
479 struct active_request_slot *slot;
480 struct curl_slist *headers = NULL;
481 int use_gzip = rpc->gzip_request;
482 char *gzip_body = NULL;
483 size_t gzip_size = 0;
484 int err, large_request = 0;
485 int needs_100_continue = 0;
487 /* Try to load the entire request, if we can fit it into the
488 * allocated buffer space we can use HTTP/1.0 and avoid the
489 * chunked encoding mess.
491 while (1) {
492 size_t left = rpc->alloc - rpc->len;
493 char *buf = rpc->buf + rpc->len;
494 int n;
496 if (left < LARGE_PACKET_MAX) {
497 large_request = 1;
498 use_gzip = 0;
499 break;
502 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
503 if (!n)
504 break;
505 rpc->len += n;
508 if (large_request) {
509 struct slot_results results;
511 do {
512 err = probe_rpc(rpc, &results);
513 if (err == HTTP_REAUTH)
514 credential_fill(&http_auth);
515 } while (err == HTTP_REAUTH);
516 if (err != HTTP_OK)
517 return -1;
519 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
520 needs_100_continue = 1;
523 headers = curl_slist_append(headers, rpc->hdr_content_type);
524 headers = curl_slist_append(headers, rpc->hdr_accept);
525 headers = curl_slist_append(headers, needs_100_continue ?
526 "Expect: 100-continue" : "Expect:");
528 retry:
529 slot = get_active_slot();
531 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
532 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
533 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
534 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
536 if (large_request) {
537 /* The request body is large and the size cannot be predicted.
538 * We must use chunked encoding to send it.
540 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
541 rpc->initial_buffer = 1;
542 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
543 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
544 #ifndef NO_CURL_IOCTL
545 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
546 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
547 #endif
548 if (options.verbosity > 1) {
549 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
550 fflush(stderr);
553 } else if (gzip_body) {
555 * If we are looping to retry authentication, then the previous
556 * run will have set up the headers and gzip buffer already,
557 * and we just need to send it.
559 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
560 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
562 } else if (use_gzip && 1024 < rpc->len) {
563 /* The client backend isn't giving us compressed data so
564 * we can try to deflate it ourselves, this may save on.
565 * the transfer time.
567 git_zstream stream;
568 int ret;
570 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
571 gzip_size = git_deflate_bound(&stream, rpc->len);
572 gzip_body = xmalloc(gzip_size);
574 stream.next_in = (unsigned char *)rpc->buf;
575 stream.avail_in = rpc->len;
576 stream.next_out = (unsigned char *)gzip_body;
577 stream.avail_out = gzip_size;
579 ret = git_deflate(&stream, Z_FINISH);
580 if (ret != Z_STREAM_END)
581 die("cannot deflate request; zlib deflate error %d", ret);
583 ret = git_deflate_end_gently(&stream);
584 if (ret != Z_OK)
585 die("cannot deflate request; zlib end error %d", ret);
587 gzip_size = stream.total_out;
589 headers = curl_slist_append(headers, "Content-Encoding: gzip");
590 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
591 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
593 if (options.verbosity > 1) {
594 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
595 rpc->service_name,
596 (unsigned long)rpc->len, (unsigned long)gzip_size);
597 fflush(stderr);
599 } else {
600 /* We know the complete request size in advance, use the
601 * more normal Content-Length approach.
603 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
604 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
605 if (options.verbosity > 1) {
606 fprintf(stderr, "POST %s (%lu bytes)\n",
607 rpc->service_name, (unsigned long)rpc->len);
608 fflush(stderr);
612 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
613 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
614 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
616 err = run_slot(slot, NULL);
617 if (err == HTTP_REAUTH && !large_request) {
618 credential_fill(&http_auth);
619 goto retry;
621 if (err != HTTP_OK)
622 err = -1;
624 curl_slist_free_all(headers);
625 free(gzip_body);
626 return err;
629 static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
631 const char *svc = rpc->service_name;
632 struct strbuf buf = STRBUF_INIT;
633 struct strbuf *preamble = rpc->stdin_preamble;
634 struct child_process client = CHILD_PROCESS_INIT;
635 int err = 0;
637 client.in = -1;
638 client.out = -1;
639 client.git_cmd = 1;
640 client.argv = rpc->argv;
641 if (start_command(&client))
642 exit(1);
643 if (preamble)
644 write_or_die(client.in, preamble->buf, preamble->len);
645 if (heads)
646 write_or_die(client.in, heads->buf, heads->len);
648 rpc->alloc = http_post_buffer;
649 rpc->buf = xmalloc(rpc->alloc);
650 rpc->in = client.in;
651 rpc->out = client.out;
652 strbuf_init(&rpc->result, 0);
654 strbuf_addf(&buf, "%s%s", url.buf, svc);
655 rpc->service_url = strbuf_detach(&buf, NULL);
657 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
658 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
660 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
661 rpc->hdr_accept = strbuf_detach(&buf, NULL);
663 while (!err) {
664 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
665 if (!n)
666 break;
667 rpc->pos = 0;
668 rpc->len = n;
669 err |= post_rpc(rpc);
672 close(client.in);
673 client.in = -1;
674 if (!err) {
675 strbuf_read(&rpc->result, client.out, 0);
676 } else {
677 char buf[4096];
678 for (;;)
679 if (xread(client.out, buf, sizeof(buf)) <= 0)
680 break;
683 close(client.out);
684 client.out = -1;
686 err |= finish_command(&client);
687 free(rpc->service_url);
688 free(rpc->hdr_content_type);
689 free(rpc->hdr_accept);
690 free(rpc->buf);
691 strbuf_release(&buf);
692 return err;
695 static int fetch_dumb(int nr_heads, struct ref **to_fetch)
697 struct walker *walker;
698 char **targets = xmalloc(nr_heads * sizeof(char*));
699 int ret, i;
701 if (options.depth)
702 die("dumb http transport does not support --depth");
703 for (i = 0; i < nr_heads; i++)
704 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
706 walker = get_http_walker(url.buf);
707 walker->get_all = 1;
708 walker->get_tree = 1;
709 walker->get_history = 1;
710 walker->get_verbosely = options.verbosity >= 3;
711 walker->get_recover = 0;
712 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
713 walker_free(walker);
715 for (i = 0; i < nr_heads; i++)
716 free(targets[i]);
717 free(targets);
719 return ret ? error("fetch failed.") : 0;
722 static int fetch_git(struct discovery *heads,
723 int nr_heads, struct ref **to_fetch)
725 struct rpc_state rpc;
726 struct strbuf preamble = STRBUF_INIT;
727 char *depth_arg = NULL;
728 int argc = 0, i, err;
729 const char *argv[17];
731 argv[argc++] = "fetch-pack";
732 argv[argc++] = "--stateless-rpc";
733 argv[argc++] = "--stdin";
734 argv[argc++] = "--lock-pack";
735 if (options.followtags)
736 argv[argc++] = "--include-tag";
737 if (options.thin)
738 argv[argc++] = "--thin";
739 if (options.verbosity >= 3) {
740 argv[argc++] = "-v";
741 argv[argc++] = "-v";
743 if (options.check_self_contained_and_connected)
744 argv[argc++] = "--check-self-contained-and-connected";
745 if (options.cloning)
746 argv[argc++] = "--cloning";
747 if (options.update_shallow)
748 argv[argc++] = "--update-shallow";
749 if (!options.progress)
750 argv[argc++] = "--no-progress";
751 if (options.depth) {
752 struct strbuf buf = STRBUF_INIT;
753 strbuf_addf(&buf, "--depth=%lu", options.depth);
754 depth_arg = strbuf_detach(&buf, NULL);
755 argv[argc++] = depth_arg;
757 argv[argc++] = url.buf;
758 argv[argc++] = NULL;
760 for (i = 0; i < nr_heads; i++) {
761 struct ref *ref = to_fetch[i];
762 if (!*ref->name)
763 die("cannot fetch by sha1 over smart http");
764 packet_buf_write(&preamble, "%s %s\n",
765 sha1_to_hex(ref->old_sha1), ref->name);
767 packet_buf_flush(&preamble);
769 memset(&rpc, 0, sizeof(rpc));
770 rpc.service_name = "git-upload-pack",
771 rpc.argv = argv;
772 rpc.stdin_preamble = &preamble;
773 rpc.gzip_request = 1;
775 err = rpc_service(&rpc, heads);
776 if (rpc.result.len)
777 write_or_die(1, rpc.result.buf, rpc.result.len);
778 strbuf_release(&rpc.result);
779 strbuf_release(&preamble);
780 free(depth_arg);
781 return err;
784 static int fetch(int nr_heads, struct ref **to_fetch)
786 struct discovery *d = discover_refs("git-upload-pack", 0);
787 if (d->proto_git)
788 return fetch_git(d, nr_heads, to_fetch);
789 else
790 return fetch_dumb(nr_heads, to_fetch);
793 static void parse_fetch(struct strbuf *buf)
795 struct ref **to_fetch = NULL;
796 struct ref *list_head = NULL;
797 struct ref **list = &list_head;
798 int alloc_heads = 0, nr_heads = 0;
800 do {
801 const char *p;
802 if (skip_prefix(buf->buf, "fetch ", &p)) {
803 const char *name;
804 struct ref *ref;
805 unsigned char old_sha1[20];
807 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
808 die("protocol error: expected sha/ref, got %s'", p);
809 if (p[40] == ' ')
810 name = p + 41;
811 else if (!p[40])
812 name = "";
813 else
814 die("protocol error: expected sha/ref, got %s'", p);
816 ref = alloc_ref(name);
817 hashcpy(ref->old_sha1, old_sha1);
819 *list = ref;
820 list = &ref->next;
822 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
823 to_fetch[nr_heads++] = ref;
825 else
826 die("http transport does not support %s", buf->buf);
828 strbuf_reset(buf);
829 if (strbuf_getline(buf, stdin, '\n') == EOF)
830 return;
831 if (!*buf->buf)
832 break;
833 } while (1);
835 if (fetch(nr_heads, to_fetch))
836 exit(128); /* error already reported */
837 free_refs(list_head);
838 free(to_fetch);
840 printf("\n");
841 fflush(stdout);
842 strbuf_reset(buf);
845 static int push_dav(int nr_spec, char **specs)
847 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
848 int argc = 0, i;
850 argv[argc++] = "http-push";
851 argv[argc++] = "--helper-status";
852 if (options.dry_run)
853 argv[argc++] = "--dry-run";
854 if (options.verbosity > 1)
855 argv[argc++] = "--verbose";
856 argv[argc++] = url.buf;
857 for (i = 0; i < nr_spec; i++)
858 argv[argc++] = specs[i];
859 argv[argc++] = NULL;
861 if (run_command_v_opt(argv, RUN_GIT_CMD))
862 die("git-%s failed", argv[0]);
863 free(argv);
864 return 0;
867 static int push_git(struct discovery *heads, int nr_spec, char **specs)
869 struct rpc_state rpc;
870 int i, err;
871 struct argv_array args;
872 struct string_list_item *cas_option;
873 struct strbuf preamble = STRBUF_INIT;
875 argv_array_init(&args);
876 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
877 NULL);
879 if (options.thin)
880 argv_array_push(&args, "--thin");
881 if (options.dry_run)
882 argv_array_push(&args, "--dry-run");
883 if (options.push_cert)
884 argv_array_push(&args, "--signed");
885 if (options.verbosity == 0)
886 argv_array_push(&args, "--quiet");
887 else if (options.verbosity > 1)
888 argv_array_push(&args, "--verbose");
889 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
890 for_each_string_list_item(cas_option, &cas_options)
891 argv_array_push(&args, cas_option->string);
892 argv_array_push(&args, url.buf);
894 argv_array_push(&args, "--stdin");
895 for (i = 0; i < nr_spec; i++)
896 packet_buf_write(&preamble, "%s\n", specs[i]);
897 packet_buf_flush(&preamble);
899 memset(&rpc, 0, sizeof(rpc));
900 rpc.service_name = "git-receive-pack",
901 rpc.argv = args.argv;
902 rpc.stdin_preamble = &preamble;
904 err = rpc_service(&rpc, heads);
905 if (rpc.result.len)
906 write_or_die(1, rpc.result.buf, rpc.result.len);
907 strbuf_release(&rpc.result);
908 strbuf_release(&preamble);
909 argv_array_clear(&args);
910 return err;
913 static int push(int nr_spec, char **specs)
915 struct discovery *heads = discover_refs("git-receive-pack", 1);
916 int ret;
918 if (heads->proto_git)
919 ret = push_git(heads, nr_spec, specs);
920 else
921 ret = push_dav(nr_spec, specs);
922 free_discovery(heads);
923 return ret;
926 static void parse_push(struct strbuf *buf)
928 char **specs = NULL;
929 int alloc_spec = 0, nr_spec = 0, i, ret;
931 do {
932 if (starts_with(buf->buf, "push ")) {
933 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
934 specs[nr_spec++] = xstrdup(buf->buf + 5);
936 else
937 die("http transport does not support %s", buf->buf);
939 strbuf_reset(buf);
940 if (strbuf_getline(buf, stdin, '\n') == EOF)
941 goto free_specs;
942 if (!*buf->buf)
943 break;
944 } while (1);
946 ret = push(nr_spec, specs);
947 printf("\n");
948 fflush(stdout);
950 if (ret)
951 exit(128); /* error already reported */
953 free_specs:
954 for (i = 0; i < nr_spec; i++)
955 free(specs[i]);
956 free(specs);
959 int main(int argc, const char **argv)
961 struct strbuf buf = STRBUF_INIT;
962 int nongit;
964 git_setup_gettext();
966 git_extract_argv0_path(argv[0]);
967 setup_git_directory_gently(&nongit);
968 if (argc < 2) {
969 error("remote-curl: usage: git remote-curl <remote> [<url>]");
970 return 1;
973 options.verbosity = 1;
974 options.progress = !!isatty(2);
975 options.thin = 1;
977 remote = remote_get(argv[1]);
979 if (argc > 2) {
980 end_url_with_slash(&url, argv[2]);
981 } else {
982 end_url_with_slash(&url, remote->url[0]);
985 http_init(remote, url.buf, 0);
987 do {
988 const char *arg;
990 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
991 if (ferror(stdin))
992 error("remote-curl: error reading command stream from git");
993 return 1;
995 if (buf.len == 0)
996 break;
997 if (starts_with(buf.buf, "fetch ")) {
998 if (nongit)
999 die("remote-curl: fetch attempted without a local repo");
1000 parse_fetch(&buf);
1002 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
1003 int for_push = !!strstr(buf.buf + 4, "for-push");
1004 output_refs(get_refs(for_push));
1006 } else if (starts_with(buf.buf, "push ")) {
1007 parse_push(&buf);
1009 } else if (skip_prefix(buf.buf, "option ", &arg)) {
1010 char *value = strchr(arg, ' ');
1011 int result;
1013 if (value)
1014 *value++ = '\0';
1015 else
1016 value = "true";
1018 result = set_option(arg, value);
1019 if (!result)
1020 printf("ok\n");
1021 else if (result < 0)
1022 printf("error invalid value\n");
1023 else
1024 printf("unsupported\n");
1025 fflush(stdout);
1027 } else if (!strcmp(buf.buf, "capabilities")) {
1028 printf("fetch\n");
1029 printf("option\n");
1030 printf("push\n");
1031 printf("check-connectivity\n");
1032 printf("\n");
1033 fflush(stdout);
1034 } else {
1035 error("remote-curl: unknown command '%s' from git", buf.buf);
1036 return 1;
1038 strbuf_reset(&buf);
1039 } while (1);
1041 http_cleanup();
1043 return 0;