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"
14
15static struct remote *remote;
16/* always ends with a trailing slash */
17static struct strbuf url = STRBUF_INIT;
18
19struct 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};
30static struct options options;
31static struct string_list cas_options = STRING_LIST_INIT_DUP;
32
33static int set_option(const char *name, const char *value)
34{
35 if (!strcmp(name, "verbosity")) {
36 char *end;
37 int v = strtol(value, &end, 10);
38 if (value == end || *end)
39 return -1;
40 options.verbosity = v;
41 return 0;
42 }
43 else if (!strcmp(name, "progress")) {
44 if (!strcmp(value, "true"))
45 options.progress = 1;
46 else if (!strcmp(value, "false"))
47 options.progress = 0;
48 else
49 return -1;
50 return 0;
51 }
52 else if (!strcmp(name, "depth")) {
53 char *end;
54 unsigned long v = strtoul(value, &end, 10);
55 if (value == end || *end)
56 return -1;
57 options.depth = v;
58 return 0;
59 }
60 else if (!strcmp(name, "followtags")) {
61 if (!strcmp(value, "true"))
62 options.followtags = 1;
63 else if (!strcmp(value, "false"))
64 options.followtags = 0;
65 else
66 return -1;
67 return 0;
68 }
69 else if (!strcmp(name, "dry-run")) {
70 if (!strcmp(value, "true"))
71 options.dry_run = 1;
72 else if (!strcmp(value, "false"))
73 options.dry_run = 0;
74 else
75 return -1;
76 return 0;
77 }
78 else if (!strcmp(name, "check-connectivity")) {
79 if (!strcmp(value, "true"))
80 options.check_self_contained_and_connected = 1;
81 else if (!strcmp(value, "false"))
82 options.check_self_contained_and_connected = 0;
83 else
84 return -1;
85 return 0;
86 }
87 else if (!strcmp(name, "cas")) {
88 struct strbuf val = STRBUF_INIT;
89 strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
90 string_list_append(&cas_options, val.buf);
91 strbuf_release(&val);
92 return 0;
93 } else if (!strcmp(name, "cloning")) {
94 if (!strcmp(value, "true"))
95 options.cloning = 1;
96 else if (!strcmp(value, "false"))
97 options.cloning = 0;
98 else
99 return -1;
100 return 0;
101 } else if (!strcmp(name, "update-shallow")) {
102 if (!strcmp(value, "true"))
103 options.update_shallow = 1;
104 else if (!strcmp(value, "false"))
105 options.update_shallow = 0;
106 else
107 return -1;
108 return 0;
109 } else {
110 return 1 /* unsupported */;
111 }
112}
113
114struct discovery {
115 const char *service;
116 char *buf_alloc;
117 char *buf;
118 size_t len;
119 struct ref *refs;
120 struct sha1_array shallow;
121 unsigned proto_git : 1;
122};
123static struct discovery *last_discovery;
124
125static struct ref *parse_git_refs(struct discovery *heads, int for_push)
126{
127 struct ref *list = NULL;
128 get_remote_heads(-1, heads->buf, heads->len, &list,
129 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
130 return list;
131}
132
133static struct ref *parse_info_refs(struct discovery *heads)
134{
135 char *data, *start, *mid;
136 char *ref_name;
137 int i = 0;
138
139 struct ref *refs = NULL;
140 struct ref *ref = NULL;
141 struct ref *last_ref = NULL;
142
143 data = heads->buf;
144 start = NULL;
145 mid = data;
146 while (i < heads->len) {
147 if (!start) {
148 start = &data[i];
149 }
150 if (data[i] == '\t')
151 mid = &data[i];
152 if (data[i] == '\n') {
153 if (mid - start != 40)
154 die("%sinfo/refs not valid: is this a git repository?",
155 url.buf);
156 data[i] = 0;
157 ref_name = mid + 1;
158 ref = xmalloc(sizeof(struct ref) +
159 strlen(ref_name) + 1);
160 memset(ref, 0, sizeof(struct ref));
161 strcpy(ref->name, ref_name);
162 get_sha1_hex(start, ref->old_sha1);
163 if (!refs)
164 refs = ref;
165 if (last_ref)
166 last_ref->next = ref;
167 last_ref = ref;
168 start = NULL;
169 }
170 i++;
171 }
172
173 ref = alloc_ref("HEAD");
174 if (!http_fetch_ref(url.buf, ref) &&
175 !resolve_remote_symref(ref, refs)) {
176 ref->next = refs;
177 refs = ref;
178 } else {
179 free(ref);
180 }
181
182 return refs;
183}
184
185static void free_discovery(struct discovery *d)
186{
187 if (d) {
188 if (d == last_discovery)
189 last_discovery = NULL;
190 free(d->shallow.sha1);
191 free(d->buf_alloc);
192 free_refs(d->refs);
193 free(d);
194 }
195}
196
197static int show_http_message(struct strbuf *type, struct strbuf *charset,
198 struct strbuf *msg)
199{
200 const char *p, *eol;
201
202 /*
203 * We only show text/plain parts, as other types are likely
204 * to be ugly to look at on the user's terminal.
205 */
206 if (strcmp(type->buf, "text/plain"))
207 return -1;
208 if (charset->len)
209 strbuf_reencode(msg, charset->buf, get_log_output_encoding());
210
211 strbuf_trim(msg);
212 if (!msg->len)
213 return -1;
214
215 p = msg->buf;
216 do {
217 eol = strchrnul(p, '\n');
218 fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
219 p = eol + 1;
220 } while(*eol);
221 return 0;
222}
223
224static struct discovery* discover_refs(const char *service, int for_push)
225{
226 struct strbuf exp = STRBUF_INIT;
227 struct strbuf type = STRBUF_INIT;
228 struct strbuf charset = STRBUF_INIT;
229 struct strbuf buffer = STRBUF_INIT;
230 struct strbuf refs_url = STRBUF_INIT;
231 struct strbuf effective_url = STRBUF_INIT;
232 struct discovery *last = last_discovery;
233 int http_ret, maybe_smart = 0;
234 struct http_get_options options;
235
236 if (last && !strcmp(service, last->service))
237 return last;
238 free_discovery(last);
239
240 strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
241 if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
242 git_env_bool("GIT_SMART_HTTP", 1)) {
243 maybe_smart = 1;
244 if (!strchr(url.buf, '?'))
245 strbuf_addch(&refs_url, '?');
246 else
247 strbuf_addch(&refs_url, '&');
248 strbuf_addf(&refs_url, "service=%s", service);
249 }
250
251 memset(&options, 0, sizeof(options));
252 options.content_type = &type;
253 options.charset = &charset;
254 options.effective_url = &effective_url;
255 options.base_url = &url;
256 options.no_cache = 1;
257 options.keep_error = 1;
258
259 http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
260 switch (http_ret) {
261 case HTTP_OK:
262 break;
263 case HTTP_MISSING_TARGET:
264 show_http_message(&type, &charset, &buffer);
265 die("repository '%s' not found", url.buf);
266 case HTTP_NOAUTH:
267 show_http_message(&type, &charset, &buffer);
268 die("Authentication failed for '%s'", url.buf);
269 default:
270 show_http_message(&type, &charset, &buffer);
271 die("unable to access '%s': %s", url.buf, curl_errorstr);
272 }
273
274 last= xcalloc(1, sizeof(*last_discovery));
275 last->service = service;
276 last->buf_alloc = strbuf_detach(&buffer, &last->len);
277 last->buf = last->buf_alloc;
278
279 strbuf_addf(&exp, "application/x-%s-advertisement", service);
280 if (maybe_smart &&
281 (5 <= last->len && last->buf[4] == '#') &&
282 !strbuf_cmp(&exp, &type)) {
283 char *line;
284
285 /*
286 * smart HTTP response; validate that the service
287 * pkt-line matches our request.
288 */
289 line = packet_read_line_buf(&last->buf, &last->len, NULL);
290
291 strbuf_reset(&exp);
292 strbuf_addf(&exp, "# service=%s", service);
293 if (strcmp(line, exp.buf))
294 die("invalid server response; got '%s'", line);
295 strbuf_release(&exp);
296
297 /* The header can include additional metadata lines, up
298 * until a packet flush marker. Ignore these now, but
299 * in the future we might start to scan them.
300 */
301 while (packet_read_line_buf(&last->buf, &last->len, NULL))
302 ;
303
304 last->proto_git = 1;
305 }
306
307 if (last->proto_git)
308 last->refs = parse_git_refs(last, for_push);
309 else
310 last->refs = parse_info_refs(last);
311
312 strbuf_release(&refs_url);
313 strbuf_release(&exp);
314 strbuf_release(&type);
315 strbuf_release(&charset);
316 strbuf_release(&effective_url);
317 strbuf_release(&buffer);
318 last_discovery = last;
319 return last;
320}
321
322static struct ref *get_refs(int for_push)
323{
324 struct discovery *heads;
325
326 if (for_push)
327 heads = discover_refs("git-receive-pack", for_push);
328 else
329 heads = discover_refs("git-upload-pack", for_push);
330
331 return heads->refs;
332}
333
334static void output_refs(struct ref *refs)
335{
336 struct ref *posn;
337 for (posn = refs; posn; posn = posn->next) {
338 if (posn->symref)
339 printf("@%s %s\n", posn->symref, posn->name);
340 else
341 printf("%s %s\n", sha1_to_hex(posn->old_sha1), posn->name);
342 }
343 printf("\n");
344 fflush(stdout);
345}
346
347struct rpc_state {
348 const char *service_name;
349 const char **argv;
350 struct strbuf *stdin_preamble;
351 char *service_url;
352 char *hdr_content_type;
353 char *hdr_accept;
354 char *buf;
355 size_t alloc;
356 size_t len;
357 size_t pos;
358 int in;
359 int out;
360 struct strbuf result;
361 unsigned gzip_request : 1;
362 unsigned initial_buffer : 1;
363};
364
365static size_t rpc_out(void *ptr, size_t eltsize,
366 size_t nmemb, void *buffer_)
367{
368 size_t max = eltsize * nmemb;
369 struct rpc_state *rpc = buffer_;
370 size_t avail = rpc->len - rpc->pos;
371
372 if (!avail) {
373 rpc->initial_buffer = 0;
374 avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
375 if (!avail)
376 return 0;
377 rpc->pos = 0;
378 rpc->len = avail;
379 }
380
381 if (max < avail)
382 avail = max;
383 memcpy(ptr, rpc->buf + rpc->pos, avail);
384 rpc->pos += avail;
385 return avail;
386}
387
388#ifndef NO_CURL_IOCTL
389static curlioerr rpc_ioctl(CURL *handle, int cmd, void *clientp)
390{
391 struct rpc_state *rpc = clientp;
392
393 switch (cmd) {
394 case CURLIOCMD_NOP:
395 return CURLIOE_OK;
396
397 case CURLIOCMD_RESTARTREAD:
398 if (rpc->initial_buffer) {
399 rpc->pos = 0;
400 return CURLIOE_OK;
401 }
402 fprintf(stderr, "Unable to rewind rpc post data - try increasing http.postBuffer\n");
403 return CURLIOE_FAILRESTART;
404
405 default:
406 return CURLIOE_UNKNOWNCMD;
407 }
408}
409#endif
410
411static size_t rpc_in(char *ptr, size_t eltsize,
412 size_t nmemb, void *buffer_)
413{
414 size_t size = eltsize * nmemb;
415 struct rpc_state *rpc = buffer_;
416 write_or_die(rpc->in, ptr, size);
417 return size;
418}
419
420static int run_slot(struct active_request_slot *slot,
421 struct slot_results *results)
422{
423 int err;
424 struct slot_results results_buf;
425
426 if (!results)
427 results = &results_buf;
428
429 err = run_one_slot(slot, results);
430
431 if (err != HTTP_OK && err != HTTP_REAUTH) {
432 error("RPC failed; result=%d, HTTP code = %ld",
433 results->curl_result, results->http_code);
434 }
435
436 return err;
437}
438
439static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
440{
441 struct active_request_slot *slot;
442 struct curl_slist *headers = NULL;
443 struct strbuf buf = STRBUF_INIT;
444 int err;
445
446 slot = get_active_slot();
447
448 headers = curl_slist_append(headers, rpc->hdr_content_type);
449 headers = curl_slist_append(headers, rpc->hdr_accept);
450
451 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
452 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
453 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
454 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, NULL);
455 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, "0000");
456 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, 4);
457 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
458 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
459 curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
460
461 err = run_slot(slot, results);
462
463 curl_slist_free_all(headers);
464 strbuf_release(&buf);
465 return err;
466}
467
468static int post_rpc(struct rpc_state *rpc)
469{
470 struct active_request_slot *slot;
471 struct curl_slist *headers = NULL;
472 int use_gzip = rpc->gzip_request;
473 char *gzip_body = NULL;
474 size_t gzip_size = 0;
475 int err, large_request = 0;
476 int needs_100_continue = 0;
477
478 /* Try to load the entire request, if we can fit it into the
479 * allocated buffer space we can use HTTP/1.0 and avoid the
480 * chunked encoding mess.
481 */
482 while (1) {
483 size_t left = rpc->alloc - rpc->len;
484 char *buf = rpc->buf + rpc->len;
485 int n;
486
487 if (left < LARGE_PACKET_MAX) {
488 large_request = 1;
489 use_gzip = 0;
490 break;
491 }
492
493 n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
494 if (!n)
495 break;
496 rpc->len += n;
497 }
498
499 if (large_request) {
500 struct slot_results results;
501
502 do {
503 err = probe_rpc(rpc, &results);
504 if (err == HTTP_REAUTH)
505 credential_fill(&http_auth);
506 } while (err == HTTP_REAUTH);
507 if (err != HTTP_OK)
508 return -1;
509
510 if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
511 needs_100_continue = 1;
512 }
513
514 headers = curl_slist_append(headers, rpc->hdr_content_type);
515 headers = curl_slist_append(headers, rpc->hdr_accept);
516 headers = curl_slist_append(headers, needs_100_continue ?
517 "Expect: 100-continue" : "Expect:");
518
519retry:
520 slot = get_active_slot();
521
522 curl_easy_setopt(slot->curl, CURLOPT_NOBODY, 0);
523 curl_easy_setopt(slot->curl, CURLOPT_POST, 1);
524 curl_easy_setopt(slot->curl, CURLOPT_URL, rpc->service_url);
525 curl_easy_setopt(slot->curl, CURLOPT_ENCODING, "gzip");
526
527 if (large_request) {
528 /* The request body is large and the size cannot be predicted.
529 * We must use chunked encoding to send it.
530 */
531 headers = curl_slist_append(headers, "Transfer-Encoding: chunked");
532 rpc->initial_buffer = 1;
533 curl_easy_setopt(slot->curl, CURLOPT_READFUNCTION, rpc_out);
534 curl_easy_setopt(slot->curl, CURLOPT_INFILE, rpc);
535#ifndef NO_CURL_IOCTL
536 curl_easy_setopt(slot->curl, CURLOPT_IOCTLFUNCTION, rpc_ioctl);
537 curl_easy_setopt(slot->curl, CURLOPT_IOCTLDATA, rpc);
538#endif
539 if (options.verbosity > 1) {
540 fprintf(stderr, "POST %s (chunked)\n", rpc->service_name);
541 fflush(stderr);
542 }
543
544 } else if (gzip_body) {
545 /*
546 * If we are looping to retry authentication, then the previous
547 * run will have set up the headers and gzip buffer already,
548 * and we just need to send it.
549 */
550 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
551 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
552
553 } else if (use_gzip && 1024 < rpc->len) {
554 /* The client backend isn't giving us compressed data so
555 * we can try to deflate it ourselves, this may save on.
556 * the transfer time.
557 */
558 git_zstream stream;
559 int ret;
560
561 memset(&stream, 0, sizeof(stream));
562 git_deflate_init_gzip(&stream, Z_BEST_COMPRESSION);
563 gzip_size = git_deflate_bound(&stream, rpc->len);
564 gzip_body = xmalloc(gzip_size);
565
566 stream.next_in = (unsigned char *)rpc->buf;
567 stream.avail_in = rpc->len;
568 stream.next_out = (unsigned char *)gzip_body;
569 stream.avail_out = gzip_size;
570
571 ret = git_deflate(&stream, Z_FINISH);
572 if (ret != Z_STREAM_END)
573 die("cannot deflate request; zlib deflate error %d", ret);
574
575 ret = git_deflate_end_gently(&stream);
576 if (ret != Z_OK)
577 die("cannot deflate request; zlib end error %d", ret);
578
579 gzip_size = stream.total_out;
580
581 headers = curl_slist_append(headers, "Content-Encoding: gzip");
582 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, gzip_body);
583 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, gzip_size);
584
585 if (options.verbosity > 1) {
586 fprintf(stderr, "POST %s (gzip %lu to %lu bytes)\n",
587 rpc->service_name,
588 (unsigned long)rpc->len, (unsigned long)gzip_size);
589 fflush(stderr);
590 }
591 } else {
592 /* We know the complete request size in advance, use the
593 * more normal Content-Length approach.
594 */
595 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDS, rpc->buf);
596 curl_easy_setopt(slot->curl, CURLOPT_POSTFIELDSIZE, rpc->len);
597 if (options.verbosity > 1) {
598 fprintf(stderr, "POST %s (%lu bytes)\n",
599 rpc->service_name, (unsigned long)rpc->len);
600 fflush(stderr);
601 }
602 }
603
604 curl_easy_setopt(slot->curl, CURLOPT_HTTPHEADER, headers);
605 curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
606 curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
607
608 err = run_slot(slot, NULL);
609 if (err == HTTP_REAUTH && !large_request) {
610 credential_fill(&http_auth);
611 goto retry;
612 }
613 if (err != HTTP_OK)
614 err = -1;
615
616 curl_slist_free_all(headers);
617 free(gzip_body);
618 return err;
619}
620
621static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
622{
623 const char *svc = rpc->service_name;
624 struct strbuf buf = STRBUF_INIT;
625 struct strbuf *preamble = rpc->stdin_preamble;
626 struct child_process client;
627 int err = 0;
628
629 memset(&client, 0, sizeof(client));
630 client.in = -1;
631 client.out = -1;
632 client.git_cmd = 1;
633 client.argv = rpc->argv;
634 if (start_command(&client))
635 exit(1);
636 if (preamble)
637 write_or_die(client.in, preamble->buf, preamble->len);
638 if (heads)
639 write_or_die(client.in, heads->buf, heads->len);
640
641 rpc->alloc = http_post_buffer;
642 rpc->buf = xmalloc(rpc->alloc);
643 rpc->in = client.in;
644 rpc->out = client.out;
645 strbuf_init(&rpc->result, 0);
646
647 strbuf_addf(&buf, "%s%s", url.buf, svc);
648 rpc->service_url = strbuf_detach(&buf, NULL);
649
650 strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
651 rpc->hdr_content_type = strbuf_detach(&buf, NULL);
652
653 strbuf_addf(&buf, "Accept: application/x-%s-result", svc);
654 rpc->hdr_accept = strbuf_detach(&buf, NULL);
655
656 while (!err) {
657 int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
658 if (!n)
659 break;
660 rpc->pos = 0;
661 rpc->len = n;
662 err |= post_rpc(rpc);
663 }
664
665 close(client.in);
666 client.in = -1;
667 if (!err) {
668 strbuf_read(&rpc->result, client.out, 0);
669 } else {
670 char buf[4096];
671 for (;;)
672 if (xread(client.out, buf, sizeof(buf)) <= 0)
673 break;
674 }
675
676 close(client.out);
677 client.out = -1;
678
679 err |= finish_command(&client);
680 free(rpc->service_url);
681 free(rpc->hdr_content_type);
682 free(rpc->hdr_accept);
683 free(rpc->buf);
684 strbuf_release(&buf);
685 return err;
686}
687
688static int fetch_dumb(int nr_heads, struct ref **to_fetch)
689{
690 struct walker *walker;
691 char **targets = xmalloc(nr_heads * sizeof(char*));
692 int ret, i;
693
694 if (options.depth)
695 die("dumb http transport does not support --depth");
696 for (i = 0; i < nr_heads; i++)
697 targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
698
699 walker = get_http_walker(url.buf);
700 walker->get_all = 1;
701 walker->get_tree = 1;
702 walker->get_history = 1;
703 walker->get_verbosely = options.verbosity >= 3;
704 walker->get_recover = 0;
705 ret = walker_fetch(walker, nr_heads, targets, NULL, NULL);
706 walker_free(walker);
707
708 for (i = 0; i < nr_heads; i++)
709 free(targets[i]);
710 free(targets);
711
712 return ret ? error("Fetch failed.") : 0;
713}
714
715static int fetch_git(struct discovery *heads,
716 int nr_heads, struct ref **to_fetch)
717{
718 struct rpc_state rpc;
719 struct strbuf preamble = STRBUF_INIT;
720 char *depth_arg = NULL;
721 int argc = 0, i, err;
722 const char *argv[17];
723
724 argv[argc++] = "fetch-pack";
725 argv[argc++] = "--stateless-rpc";
726 argv[argc++] = "--stdin";
727 argv[argc++] = "--lock-pack";
728 if (options.followtags)
729 argv[argc++] = "--include-tag";
730 if (options.thin)
731 argv[argc++] = "--thin";
732 if (options.verbosity >= 3) {
733 argv[argc++] = "-v";
734 argv[argc++] = "-v";
735 }
736 if (options.check_self_contained_and_connected)
737 argv[argc++] = "--check-self-contained-and-connected";
738 if (options.cloning)
739 argv[argc++] = "--cloning";
740 if (options.update_shallow)
741 argv[argc++] = "--update-shallow";
742 if (!options.progress)
743 argv[argc++] = "--no-progress";
744 if (options.depth) {
745 struct strbuf buf = STRBUF_INIT;
746 strbuf_addf(&buf, "--depth=%lu", options.depth);
747 depth_arg = strbuf_detach(&buf, NULL);
748 argv[argc++] = depth_arg;
749 }
750 argv[argc++] = url.buf;
751 argv[argc++] = NULL;
752
753 for (i = 0; i < nr_heads; i++) {
754 struct ref *ref = to_fetch[i];
755 if (!ref->name || !*ref->name)
756 die("cannot fetch by sha1 over smart http");
757 packet_buf_write(&preamble, "%s %s\n",
758 sha1_to_hex(ref->old_sha1), ref->name);
759 }
760 packet_buf_flush(&preamble);
761
762 memset(&rpc, 0, sizeof(rpc));
763 rpc.service_name = "git-upload-pack",
764 rpc.argv = argv;
765 rpc.stdin_preamble = &preamble;
766 rpc.gzip_request = 1;
767
768 err = rpc_service(&rpc, heads);
769 if (rpc.result.len)
770 write_or_die(1, rpc.result.buf, rpc.result.len);
771 strbuf_release(&rpc.result);
772 strbuf_release(&preamble);
773 free(depth_arg);
774 return err;
775}
776
777static int fetch(int nr_heads, struct ref **to_fetch)
778{
779 struct discovery *d = discover_refs("git-upload-pack", 0);
780 if (d->proto_git)
781 return fetch_git(d, nr_heads, to_fetch);
782 else
783 return fetch_dumb(nr_heads, to_fetch);
784}
785
786static void parse_fetch(struct strbuf *buf)
787{
788 struct ref **to_fetch = NULL;
789 struct ref *list_head = NULL;
790 struct ref **list = &list_head;
791 int alloc_heads = 0, nr_heads = 0;
792
793 do {
794 const char *p;
795 if (skip_prefix(buf->buf, "fetch ", &p)) {
796 const char *name;
797 struct ref *ref;
798 unsigned char old_sha1[20];
799
800 if (strlen(p) < 40 || get_sha1_hex(p, old_sha1))
801 die("protocol error: expected sha/ref, got %s'", p);
802 if (p[40] == ' ')
803 name = p + 41;
804 else if (!p[40])
805 name = "";
806 else
807 die("protocol error: expected sha/ref, got %s'", p);
808
809 ref = alloc_ref(name);
810 hashcpy(ref->old_sha1, old_sha1);
811
812 *list = ref;
813 list = &ref->next;
814
815 ALLOC_GROW(to_fetch, nr_heads + 1, alloc_heads);
816 to_fetch[nr_heads++] = ref;
817 }
818 else
819 die("http transport does not support %s", buf->buf);
820
821 strbuf_reset(buf);
822 if (strbuf_getline(buf, stdin, '\n') == EOF)
823 return;
824 if (!*buf->buf)
825 break;
826 } while (1);
827
828 if (fetch(nr_heads, to_fetch))
829 exit(128); /* error already reported */
830 free_refs(list_head);
831 free(to_fetch);
832
833 printf("\n");
834 fflush(stdout);
835 strbuf_reset(buf);
836}
837
838static int push_dav(int nr_spec, char **specs)
839{
840 const char **argv = xmalloc((10 + nr_spec) * sizeof(char*));
841 int argc = 0, i;
842
843 argv[argc++] = "http-push";
844 argv[argc++] = "--helper-status";
845 if (options.dry_run)
846 argv[argc++] = "--dry-run";
847 if (options.verbosity > 1)
848 argv[argc++] = "--verbose";
849 argv[argc++] = url.buf;
850 for (i = 0; i < nr_spec; i++)
851 argv[argc++] = specs[i];
852 argv[argc++] = NULL;
853
854 if (run_command_v_opt(argv, RUN_GIT_CMD))
855 die("git-%s failed", argv[0]);
856 free(argv);
857 return 0;
858}
859
860static int push_git(struct discovery *heads, int nr_spec, char **specs)
861{
862 struct rpc_state rpc;
863 int i, err;
864 struct argv_array args;
865 struct string_list_item *cas_option;
866
867 argv_array_init(&args);
868 argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
869 NULL);
870
871 if (options.thin)
872 argv_array_push(&args, "--thin");
873 if (options.dry_run)
874 argv_array_push(&args, "--dry-run");
875 if (options.verbosity == 0)
876 argv_array_push(&args, "--quiet");
877 else if (options.verbosity > 1)
878 argv_array_push(&args, "--verbose");
879 argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
880 for_each_string_list_item(cas_option, &cas_options)
881 argv_array_push(&args, cas_option->string);
882 argv_array_push(&args, url.buf);
883 for (i = 0; i < nr_spec; i++)
884 argv_array_push(&args, specs[i]);
885
886 memset(&rpc, 0, sizeof(rpc));
887 rpc.service_name = "git-receive-pack",
888 rpc.argv = args.argv;
889
890 err = rpc_service(&rpc, heads);
891 if (rpc.result.len)
892 write_or_die(1, rpc.result.buf, rpc.result.len);
893 strbuf_release(&rpc.result);
894 argv_array_clear(&args);
895 return err;
896}
897
898static int push(int nr_spec, char **specs)
899{
900 struct discovery *heads = discover_refs("git-receive-pack", 1);
901 int ret;
902
903 if (heads->proto_git)
904 ret = push_git(heads, nr_spec, specs);
905 else
906 ret = push_dav(nr_spec, specs);
907 free_discovery(heads);
908 return ret;
909}
910
911static void parse_push(struct strbuf *buf)
912{
913 char **specs = NULL;
914 int alloc_spec = 0, nr_spec = 0, i, ret;
915
916 do {
917 if (starts_with(buf->buf, "push ")) {
918 ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
919 specs[nr_spec++] = xstrdup(buf->buf + 5);
920 }
921 else
922 die("http transport does not support %s", buf->buf);
923
924 strbuf_reset(buf);
925 if (strbuf_getline(buf, stdin, '\n') == EOF)
926 goto free_specs;
927 if (!*buf->buf)
928 break;
929 } while (1);
930
931 ret = push(nr_spec, specs);
932 printf("\n");
933 fflush(stdout);
934
935 if (ret)
936 exit(128); /* error already reported */
937
938 free_specs:
939 for (i = 0; i < nr_spec; i++)
940 free(specs[i]);
941 free(specs);
942}
943
944int main(int argc, const char **argv)
945{
946 struct strbuf buf = STRBUF_INIT;
947 int nongit;
948
949 git_extract_argv0_path(argv[0]);
950 setup_git_directory_gently(&nongit);
951 if (argc < 2) {
952 fprintf(stderr, "Remote needed\n");
953 return 1;
954 }
955
956 options.verbosity = 1;
957 options.progress = !!isatty(2);
958 options.thin = 1;
959
960 remote = remote_get(argv[1]);
961
962 if (argc > 2) {
963 end_url_with_slash(&url, argv[2]);
964 } else {
965 end_url_with_slash(&url, remote->url[0]);
966 }
967
968 http_init(remote, url.buf, 0);
969
970 do {
971 const char *arg;
972
973 if (strbuf_getline(&buf, stdin, '\n') == EOF) {
974 if (ferror(stdin))
975 fprintf(stderr, "Error reading command stream\n");
976 else
977 fprintf(stderr, "Unexpected end of command stream\n");
978 return 1;
979 }
980 if (buf.len == 0)
981 break;
982 if (starts_with(buf.buf, "fetch ")) {
983 if (nongit)
984 die("Fetch attempted without a local repo");
985 parse_fetch(&buf);
986
987 } else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
988 int for_push = !!strstr(buf.buf + 4, "for-push");
989 output_refs(get_refs(for_push));
990
991 } else if (starts_with(buf.buf, "push ")) {
992 parse_push(&buf);
993
994 } else if (skip_prefix(buf.buf, "option ", &arg)) {
995 char *value = strchr(arg, ' ');
996 int result;
997
998 if (value)
999 *value++ = '\0';
1000 else
1001 value = "true";
1002
1003 result = set_option(arg, value);
1004 if (!result)
1005 printf("ok\n");
1006 else if (result < 0)
1007 printf("error invalid value\n");
1008 else
1009 printf("unsupported\n");
1010 fflush(stdout);
1011
1012 } else if (!strcmp(buf.buf, "capabilities")) {
1013 printf("fetch\n");
1014 printf("option\n");
1015 printf("push\n");
1016 printf("check-connectivity\n");
1017 printf("\n");
1018 fflush(stdout);
1019 } else {
1020 fprintf(stderr, "Unknown command '%s'\n", buf.buf);
1021 return 1;
1022 }
1023 strbuf_reset(&buf);
1024 } while (1);
1025
1026 http_cleanup();
1027
1028 return 0;
1029}