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1 | #include "cache.h" | |
2 | #include "transport.h" | |
3 | #include "quote.h" | |
4 | #include "run-command.h" | |
5 | #include "commit.h" | |
6 | #include "diff.h" | |
7 | #include "revision.h" | |
8 | #include "quote.h" | |
9 | #include "remote.h" | |
10 | #include "string-list.h" | |
11 | ||
12 | static int debug; | |
13 | ||
14 | struct helper_data | |
15 | { | |
16 | const char *name; | |
17 | struct child_process *helper; | |
18 | FILE *out; | |
19 | unsigned fetch : 1, | |
20 | import : 1, | |
21 | export : 1, | |
22 | option : 1, | |
23 | push : 1, | |
24 | connect : 1, | |
25 | no_disconnect_req : 1; | |
26 | /* These go from remote name (as in "list") to private name */ | |
27 | struct refspec *refspecs; | |
28 | int refspec_nr; | |
29 | /* Transport options for fetch-pack/send-pack (should one of | |
30 | * those be invoked). | |
31 | */ | |
32 | struct git_transport_options transport_options; | |
33 | }; | |
34 | ||
35 | static void sendline(struct helper_data *helper, struct strbuf *buffer) | |
36 | { | |
37 | if (debug) | |
38 | fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf); | |
39 | if (write_in_full(helper->helper->in, buffer->buf, buffer->len) | |
40 | != buffer->len) | |
41 | die_errno("Full write to remote helper failed"); | |
42 | } | |
43 | ||
44 | static int recvline_fh(FILE *helper, struct strbuf *buffer) | |
45 | { | |
46 | strbuf_reset(buffer); | |
47 | if (debug) | |
48 | fprintf(stderr, "Debug: Remote helper: Waiting...\n"); | |
49 | if (strbuf_getline(buffer, helper, '\n') == EOF) { | |
50 | if (debug) | |
51 | fprintf(stderr, "Debug: Remote helper quit.\n"); | |
52 | exit(128); | |
53 | } | |
54 | ||
55 | if (debug) | |
56 | fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf); | |
57 | return 0; | |
58 | } | |
59 | ||
60 | static int recvline(struct helper_data *helper, struct strbuf *buffer) | |
61 | { | |
62 | return recvline_fh(helper->out, buffer); | |
63 | } | |
64 | ||
65 | static void xchgline(struct helper_data *helper, struct strbuf *buffer) | |
66 | { | |
67 | sendline(helper, buffer); | |
68 | recvline(helper, buffer); | |
69 | } | |
70 | ||
71 | static void write_constant(int fd, const char *str) | |
72 | { | |
73 | if (debug) | |
74 | fprintf(stderr, "Debug: Remote helper: -> %s", str); | |
75 | if (write_in_full(fd, str, strlen(str)) != strlen(str)) | |
76 | die_errno("Full write to remote helper failed"); | |
77 | } | |
78 | ||
79 | const char *remove_ext_force(const char *url) | |
80 | { | |
81 | if (url) { | |
82 | const char *colon = strchr(url, ':'); | |
83 | if (colon && colon[1] == ':') | |
84 | return colon + 2; | |
85 | } | |
86 | return url; | |
87 | } | |
88 | ||
89 | static void do_take_over(struct transport *transport) | |
90 | { | |
91 | struct helper_data *data; | |
92 | data = (struct helper_data *)transport->data; | |
93 | transport_take_over(transport, data->helper); | |
94 | fclose(data->out); | |
95 | free(data); | |
96 | } | |
97 | ||
98 | static struct child_process *get_helper(struct transport *transport) | |
99 | { | |
100 | struct helper_data *data = transport->data; | |
101 | struct strbuf buf = STRBUF_INIT; | |
102 | struct child_process *helper; | |
103 | const char **refspecs = NULL; | |
104 | int refspec_nr = 0; | |
105 | int refspec_alloc = 0; | |
106 | int duped; | |
107 | int code; | |
108 | ||
109 | if (data->helper) | |
110 | return data->helper; | |
111 | ||
112 | helper = xcalloc(1, sizeof(*helper)); | |
113 | helper->in = -1; | |
114 | helper->out = -1; | |
115 | helper->err = 0; | |
116 | helper->argv = xcalloc(4, sizeof(*helper->argv)); | |
117 | strbuf_addf(&buf, "git-remote-%s", data->name); | |
118 | helper->argv[0] = strbuf_detach(&buf, NULL); | |
119 | helper->argv[1] = transport->remote->name; | |
120 | helper->argv[2] = remove_ext_force(transport->url); | |
121 | helper->git_cmd = 0; | |
122 | helper->silent_exec_failure = 1; | |
123 | code = start_command(helper); | |
124 | if (code < 0 && errno == ENOENT) | |
125 | die("Unable to find remote helper for '%s'", data->name); | |
126 | else if (code != 0) | |
127 | exit(code); | |
128 | ||
129 | data->helper = helper; | |
130 | data->no_disconnect_req = 0; | |
131 | ||
132 | /* | |
133 | * Open the output as FILE* so strbuf_getline() can be used. | |
134 | * Do this with duped fd because fclose() will close the fd, | |
135 | * and stuff like taking over will require the fd to remain. | |
136 | */ | |
137 | duped = dup(helper->out); | |
138 | if (duped < 0) | |
139 | die_errno("Can't dup helper output fd"); | |
140 | data->out = xfdopen(duped, "r"); | |
141 | ||
142 | write_constant(helper->in, "capabilities\n"); | |
143 | ||
144 | while (1) { | |
145 | const char *capname; | |
146 | int mandatory = 0; | |
147 | recvline(data, &buf); | |
148 | ||
149 | if (!*buf.buf) | |
150 | break; | |
151 | ||
152 | if (*buf.buf == '*') { | |
153 | capname = buf.buf + 1; | |
154 | mandatory = 1; | |
155 | } else | |
156 | capname = buf.buf; | |
157 | ||
158 | if (debug) | |
159 | fprintf(stderr, "Debug: Got cap %s\n", capname); | |
160 | if (!strcmp(capname, "fetch")) | |
161 | data->fetch = 1; | |
162 | else if (!strcmp(capname, "option")) | |
163 | data->option = 1; | |
164 | else if (!strcmp(capname, "push")) | |
165 | data->push = 1; | |
166 | else if (!strcmp(capname, "import")) | |
167 | data->import = 1; | |
168 | else if (!strcmp(capname, "export")) | |
169 | data->export = 1; | |
170 | else if (!data->refspecs && !prefixcmp(capname, "refspec ")) { | |
171 | ALLOC_GROW(refspecs, | |
172 | refspec_nr + 1, | |
173 | refspec_alloc); | |
174 | refspecs[refspec_nr++] = strdup(buf.buf + strlen("refspec ")); | |
175 | } else if (!strcmp(capname, "connect")) { | |
176 | data->connect = 1; | |
177 | } else if (!strcmp(buf.buf, "gitdir")) { | |
178 | struct strbuf gitdir = STRBUF_INIT; | |
179 | strbuf_addf(&gitdir, "gitdir %s\n", get_git_dir()); | |
180 | sendline(data, &gitdir); | |
181 | strbuf_release(&gitdir); | |
182 | } else if (mandatory) { | |
183 | die("Unknown mandatory capability %s. This remote " | |
184 | "helper probably needs newer version of Git.\n", | |
185 | capname); | |
186 | } | |
187 | } | |
188 | if (refspecs) { | |
189 | int i; | |
190 | data->refspec_nr = refspec_nr; | |
191 | data->refspecs = parse_fetch_refspec(refspec_nr, refspecs); | |
192 | for (i = 0; i < refspec_nr; i++) { | |
193 | free((char *)refspecs[i]); | |
194 | } | |
195 | free(refspecs); | |
196 | } | |
197 | strbuf_release(&buf); | |
198 | if (debug) | |
199 | fprintf(stderr, "Debug: Capabilities complete.\n"); | |
200 | return data->helper; | |
201 | } | |
202 | ||
203 | static int disconnect_helper(struct transport *transport) | |
204 | { | |
205 | struct helper_data *data = transport->data; | |
206 | struct strbuf buf = STRBUF_INIT; | |
207 | ||
208 | if (data->helper) { | |
209 | if (debug) | |
210 | fprintf(stderr, "Debug: Disconnecting.\n"); | |
211 | if (!data->no_disconnect_req) { | |
212 | strbuf_addf(&buf, "\n"); | |
213 | sendline(data, &buf); | |
214 | } | |
215 | close(data->helper->in); | |
216 | close(data->helper->out); | |
217 | fclose(data->out); | |
218 | finish_command(data->helper); | |
219 | free((char *)data->helper->argv[0]); | |
220 | free(data->helper->argv); | |
221 | free(data->helper); | |
222 | data->helper = NULL; | |
223 | } | |
224 | return 0; | |
225 | } | |
226 | ||
227 | static const char *unsupported_options[] = { | |
228 | TRANS_OPT_UPLOADPACK, | |
229 | TRANS_OPT_RECEIVEPACK, | |
230 | TRANS_OPT_THIN, | |
231 | TRANS_OPT_KEEP | |
232 | }; | |
233 | static const char *boolean_options[] = { | |
234 | TRANS_OPT_THIN, | |
235 | TRANS_OPT_KEEP, | |
236 | TRANS_OPT_FOLLOWTAGS | |
237 | }; | |
238 | ||
239 | static int set_helper_option(struct transport *transport, | |
240 | const char *name, const char *value) | |
241 | { | |
242 | struct helper_data *data = transport->data; | |
243 | struct strbuf buf = STRBUF_INIT; | |
244 | int i, ret, is_bool = 0; | |
245 | ||
246 | get_helper(transport); | |
247 | ||
248 | if (!data->option) | |
249 | return 1; | |
250 | ||
251 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { | |
252 | if (!strcmp(name, unsupported_options[i])) | |
253 | return 1; | |
254 | } | |
255 | ||
256 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
257 | if (!strcmp(name, boolean_options[i])) { | |
258 | is_bool = 1; | |
259 | break; | |
260 | } | |
261 | } | |
262 | ||
263 | strbuf_addf(&buf, "option %s ", name); | |
264 | if (is_bool) | |
265 | strbuf_addstr(&buf, value ? "true" : "false"); | |
266 | else | |
267 | quote_c_style(value, &buf, NULL, 0); | |
268 | strbuf_addch(&buf, '\n'); | |
269 | ||
270 | xchgline(data, &buf); | |
271 | ||
272 | if (!strcmp(buf.buf, "ok")) | |
273 | ret = 0; | |
274 | else if (!prefixcmp(buf.buf, "error")) { | |
275 | ret = -1; | |
276 | } else if (!strcmp(buf.buf, "unsupported")) | |
277 | ret = 1; | |
278 | else { | |
279 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
280 | ret = 1; | |
281 | } | |
282 | strbuf_release(&buf); | |
283 | return ret; | |
284 | } | |
285 | ||
286 | static void standard_options(struct transport *t) | |
287 | { | |
288 | char buf[16]; | |
289 | int n; | |
290 | int v = t->verbose; | |
291 | ||
292 | set_helper_option(t, "progress", t->progress ? "true" : "false"); | |
293 | ||
294 | n = snprintf(buf, sizeof(buf), "%d", v + 1); | |
295 | if (n >= sizeof(buf)) | |
296 | die("impossibly large verbosity value"); | |
297 | set_helper_option(t, "verbosity", buf); | |
298 | } | |
299 | ||
300 | static int release_helper(struct transport *transport) | |
301 | { | |
302 | struct helper_data *data = transport->data; | |
303 | free_refspec(data->refspec_nr, data->refspecs); | |
304 | data->refspecs = NULL; | |
305 | disconnect_helper(transport); | |
306 | free(transport->data); | |
307 | return 0; | |
308 | } | |
309 | ||
310 | static int fetch_with_fetch(struct transport *transport, | |
311 | int nr_heads, struct ref **to_fetch) | |
312 | { | |
313 | struct helper_data *data = transport->data; | |
314 | int i; | |
315 | struct strbuf buf = STRBUF_INIT; | |
316 | ||
317 | standard_options(transport); | |
318 | ||
319 | for (i = 0; i < nr_heads; i++) { | |
320 | const struct ref *posn = to_fetch[i]; | |
321 | if (posn->status & REF_STATUS_UPTODATE) | |
322 | continue; | |
323 | ||
324 | strbuf_addf(&buf, "fetch %s %s\n", | |
325 | sha1_to_hex(posn->old_sha1), posn->name); | |
326 | } | |
327 | ||
328 | strbuf_addch(&buf, '\n'); | |
329 | sendline(data, &buf); | |
330 | ||
331 | while (1) { | |
332 | recvline(data, &buf); | |
333 | ||
334 | if (!prefixcmp(buf.buf, "lock ")) { | |
335 | const char *name = buf.buf + 5; | |
336 | if (transport->pack_lockfile) | |
337 | warning("%s also locked %s", data->name, name); | |
338 | else | |
339 | transport->pack_lockfile = xstrdup(name); | |
340 | } | |
341 | else if (!buf.len) | |
342 | break; | |
343 | else | |
344 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
345 | } | |
346 | strbuf_release(&buf); | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static int get_importer(struct transport *transport, struct child_process *fastimport) | |
351 | { | |
352 | struct child_process *helper = get_helper(transport); | |
353 | memset(fastimport, 0, sizeof(*fastimport)); | |
354 | fastimport->in = helper->out; | |
355 | fastimport->argv = xcalloc(5, sizeof(*fastimport->argv)); | |
356 | fastimport->argv[0] = "fast-import"; | |
357 | fastimport->argv[1] = "--quiet"; | |
358 | ||
359 | fastimport->git_cmd = 1; | |
360 | return start_command(fastimport); | |
361 | } | |
362 | ||
363 | static int get_exporter(struct transport *transport, | |
364 | struct child_process *fastexport, | |
365 | const char *export_marks, | |
366 | const char *import_marks, | |
367 | struct string_list *revlist_args) | |
368 | { | |
369 | struct child_process *helper = get_helper(transport); | |
370 | int argc = 0, i; | |
371 | memset(fastexport, 0, sizeof(*fastexport)); | |
372 | ||
373 | /* we need to duplicate helper->in because we want to use it after | |
374 | * fastexport is done with it. */ | |
375 | fastexport->out = dup(helper->in); | |
376 | fastexport->argv = xcalloc(4 + revlist_args->nr, sizeof(*fastexport->argv)); | |
377 | fastexport->argv[argc++] = "fast-export"; | |
378 | if (export_marks) | |
379 | fastexport->argv[argc++] = export_marks; | |
380 | if (import_marks) | |
381 | fastexport->argv[argc++] = import_marks; | |
382 | ||
383 | for (i = 0; i < revlist_args->nr; i++) | |
384 | fastexport->argv[argc++] = revlist_args->items[i].string; | |
385 | ||
386 | fastexport->git_cmd = 1; | |
387 | return start_command(fastexport); | |
388 | } | |
389 | ||
390 | static int fetch_with_import(struct transport *transport, | |
391 | int nr_heads, struct ref **to_fetch) | |
392 | { | |
393 | struct child_process fastimport; | |
394 | struct helper_data *data = transport->data; | |
395 | int i; | |
396 | struct ref *posn; | |
397 | struct strbuf buf = STRBUF_INIT; | |
398 | ||
399 | get_helper(transport); | |
400 | ||
401 | if (get_importer(transport, &fastimport)) | |
402 | die("Couldn't run fast-import"); | |
403 | ||
404 | for (i = 0; i < nr_heads; i++) { | |
405 | posn = to_fetch[i]; | |
406 | if (posn->status & REF_STATUS_UPTODATE) | |
407 | continue; | |
408 | ||
409 | strbuf_addf(&buf, "import %s\n", posn->name); | |
410 | sendline(data, &buf); | |
411 | strbuf_reset(&buf); | |
412 | } | |
413 | disconnect_helper(transport); | |
414 | finish_command(&fastimport); | |
415 | free(fastimport.argv); | |
416 | fastimport.argv = NULL; | |
417 | ||
418 | for (i = 0; i < nr_heads; i++) { | |
419 | char *private; | |
420 | posn = to_fetch[i]; | |
421 | if (posn->status & REF_STATUS_UPTODATE) | |
422 | continue; | |
423 | if (data->refspecs) | |
424 | private = apply_refspecs(data->refspecs, data->refspec_nr, posn->name); | |
425 | else | |
426 | private = strdup(posn->name); | |
427 | read_ref(private, posn->old_sha1); | |
428 | free(private); | |
429 | } | |
430 | strbuf_release(&buf); | |
431 | return 0; | |
432 | } | |
433 | ||
434 | static int process_connect_service(struct transport *transport, | |
435 | const char *name, const char *exec) | |
436 | { | |
437 | struct helper_data *data = transport->data; | |
438 | struct strbuf cmdbuf = STRBUF_INIT; | |
439 | struct child_process *helper; | |
440 | int r, duped, ret = 0; | |
441 | FILE *input; | |
442 | ||
443 | helper = get_helper(transport); | |
444 | ||
445 | /* | |
446 | * Yes, dup the pipe another time, as we need unbuffered version | |
447 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
448 | * stream buffering only can be changed before first I/O operation | |
449 | * on it. | |
450 | */ | |
451 | duped = dup(helper->out); | |
452 | if (duped < 0) | |
453 | die_errno("Can't dup helper output fd"); | |
454 | input = xfdopen(duped, "r"); | |
455 | setvbuf(input, NULL, _IONBF, 0); | |
456 | ||
457 | /* | |
458 | * Handle --upload-pack and friends. This is fire and forget... | |
459 | * just warn if it fails. | |
460 | */ | |
461 | if (strcmp(name, exec)) { | |
462 | r = set_helper_option(transport, "servpath", exec); | |
463 | if (r > 0) | |
464 | warning("Setting remote service path not supported by protocol."); | |
465 | else if (r < 0) | |
466 | warning("Invalid remote service path."); | |
467 | } | |
468 | ||
469 | if (data->connect) | |
470 | strbuf_addf(&cmdbuf, "connect %s\n", name); | |
471 | else | |
472 | goto exit; | |
473 | ||
474 | sendline(data, &cmdbuf); | |
475 | recvline_fh(input, &cmdbuf); | |
476 | if (!strcmp(cmdbuf.buf, "")) { | |
477 | data->no_disconnect_req = 1; | |
478 | if (debug) | |
479 | fprintf(stderr, "Debug: Smart transport connection " | |
480 | "ready.\n"); | |
481 | ret = 1; | |
482 | } else if (!strcmp(cmdbuf.buf, "fallback")) { | |
483 | if (debug) | |
484 | fprintf(stderr, "Debug: Falling back to dumb " | |
485 | "transport.\n"); | |
486 | } else | |
487 | die("Unknown response to connect: %s", | |
488 | cmdbuf.buf); | |
489 | ||
490 | exit: | |
491 | fclose(input); | |
492 | return ret; | |
493 | } | |
494 | ||
495 | static int process_connect(struct transport *transport, | |
496 | int for_push) | |
497 | { | |
498 | struct helper_data *data = transport->data; | |
499 | const char *name; | |
500 | const char *exec; | |
501 | ||
502 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
503 | if (for_push) | |
504 | exec = data->transport_options.receivepack; | |
505 | else | |
506 | exec = data->transport_options.uploadpack; | |
507 | ||
508 | return process_connect_service(transport, name, exec); | |
509 | } | |
510 | ||
511 | static int connect_helper(struct transport *transport, const char *name, | |
512 | const char *exec, int fd[2]) | |
513 | { | |
514 | struct helper_data *data = transport->data; | |
515 | ||
516 | /* Get_helper so connect is inited. */ | |
517 | get_helper(transport); | |
518 | if (!data->connect) | |
519 | die("Operation not supported by protocol."); | |
520 | ||
521 | if (!process_connect_service(transport, name, exec)) | |
522 | die("Can't connect to subservice %s.", name); | |
523 | ||
524 | fd[0] = data->helper->out; | |
525 | fd[1] = data->helper->in; | |
526 | return 0; | |
527 | } | |
528 | ||
529 | static int fetch(struct transport *transport, | |
530 | int nr_heads, struct ref **to_fetch) | |
531 | { | |
532 | struct helper_data *data = transport->data; | |
533 | int i, count; | |
534 | ||
535 | if (process_connect(transport, 0)) { | |
536 | do_take_over(transport); | |
537 | return transport->fetch(transport, nr_heads, to_fetch); | |
538 | } | |
539 | ||
540 | count = 0; | |
541 | for (i = 0; i < nr_heads; i++) | |
542 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
543 | count++; | |
544 | ||
545 | if (!count) | |
546 | return 0; | |
547 | ||
548 | if (data->fetch) | |
549 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
550 | ||
551 | if (data->import) | |
552 | return fetch_with_import(transport, nr_heads, to_fetch); | |
553 | ||
554 | return -1; | |
555 | } | |
556 | ||
557 | static int push_refs_with_push(struct transport *transport, | |
558 | struct ref *remote_refs, int flags) | |
559 | { | |
560 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
561 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
562 | struct helper_data *data = transport->data; | |
563 | struct strbuf buf = STRBUF_INIT; | |
564 | struct child_process *helper; | |
565 | struct ref *ref; | |
566 | ||
567 | helper = get_helper(transport); | |
568 | if (!data->push) | |
569 | return 1; | |
570 | ||
571 | for (ref = remote_refs; ref; ref = ref->next) { | |
572 | if (!ref->peer_ref && !mirror) | |
573 | continue; | |
574 | ||
575 | /* Check for statuses set by set_ref_status_for_push() */ | |
576 | switch (ref->status) { | |
577 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
578 | case REF_STATUS_UPTODATE: | |
579 | continue; | |
580 | default: | |
581 | ; /* do nothing */ | |
582 | } | |
583 | ||
584 | if (force_all) | |
585 | ref->force = 1; | |
586 | ||
587 | strbuf_addstr(&buf, "push "); | |
588 | if (!ref->deletion) { | |
589 | if (ref->force) | |
590 | strbuf_addch(&buf, '+'); | |
591 | if (ref->peer_ref) | |
592 | strbuf_addstr(&buf, ref->peer_ref->name); | |
593 | else | |
594 | strbuf_addstr(&buf, sha1_to_hex(ref->new_sha1)); | |
595 | } | |
596 | strbuf_addch(&buf, ':'); | |
597 | strbuf_addstr(&buf, ref->name); | |
598 | strbuf_addch(&buf, '\n'); | |
599 | } | |
600 | if (buf.len == 0) | |
601 | return 0; | |
602 | ||
603 | standard_options(transport); | |
604 | ||
605 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
606 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
607 | die("helper %s does not support dry-run", data->name); | |
608 | } | |
609 | ||
610 | strbuf_addch(&buf, '\n'); | |
611 | sendline(data, &buf); | |
612 | ||
613 | ref = remote_refs; | |
614 | while (1) { | |
615 | char *refname, *msg; | |
616 | int status; | |
617 | ||
618 | recvline(data, &buf); | |
619 | if (!buf.len) | |
620 | break; | |
621 | ||
622 | if (!prefixcmp(buf.buf, "ok ")) { | |
623 | status = REF_STATUS_OK; | |
624 | refname = buf.buf + 3; | |
625 | } else if (!prefixcmp(buf.buf, "error ")) { | |
626 | status = REF_STATUS_REMOTE_REJECT; | |
627 | refname = buf.buf + 6; | |
628 | } else | |
629 | die("expected ok/error, helper said '%s'\n", buf.buf); | |
630 | ||
631 | msg = strchr(refname, ' '); | |
632 | if (msg) { | |
633 | struct strbuf msg_buf = STRBUF_INIT; | |
634 | const char *end; | |
635 | ||
636 | *msg++ = '\0'; | |
637 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
638 | msg = strbuf_detach(&msg_buf, NULL); | |
639 | else | |
640 | msg = xstrdup(msg); | |
641 | strbuf_release(&msg_buf); | |
642 | ||
643 | if (!strcmp(msg, "no match")) { | |
644 | status = REF_STATUS_NONE; | |
645 | free(msg); | |
646 | msg = NULL; | |
647 | } | |
648 | else if (!strcmp(msg, "up to date")) { | |
649 | status = REF_STATUS_UPTODATE; | |
650 | free(msg); | |
651 | msg = NULL; | |
652 | } | |
653 | else if (!strcmp(msg, "non-fast forward")) { | |
654 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
655 | free(msg); | |
656 | msg = NULL; | |
657 | } | |
658 | } | |
659 | ||
660 | if (ref) | |
661 | ref = find_ref_by_name(ref, refname); | |
662 | if (!ref) | |
663 | ref = find_ref_by_name(remote_refs, refname); | |
664 | if (!ref) { | |
665 | warning("helper reported unexpected status of %s", refname); | |
666 | continue; | |
667 | } | |
668 | ||
669 | if (ref->status != REF_STATUS_NONE) { | |
670 | /* | |
671 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
672 | * status reported by the remote helper if the latter is 'no match'. | |
673 | */ | |
674 | if (status == REF_STATUS_NONE) | |
675 | continue; | |
676 | } | |
677 | ||
678 | ref->status = status; | |
679 | ref->remote_status = msg; | |
680 | } | |
681 | strbuf_release(&buf); | |
682 | return 0; | |
683 | } | |
684 | ||
685 | static int push_refs_with_export(struct transport *transport, | |
686 | struct ref *remote_refs, int flags) | |
687 | { | |
688 | struct ref *ref; | |
689 | struct child_process *helper, exporter; | |
690 | struct helper_data *data = transport->data; | |
691 | char *export_marks = NULL, *import_marks = NULL; | |
692 | struct string_list revlist_args = STRING_LIST_INIT_NODUP; | |
693 | struct strbuf buf = STRBUF_INIT; | |
694 | ||
695 | helper = get_helper(transport); | |
696 | ||
697 | write_constant(helper->in, "export\n"); | |
698 | ||
699 | recvline(data, &buf); | |
700 | if (debug) | |
701 | fprintf(stderr, "Debug: Got export_marks '%s'\n", buf.buf); | |
702 | if (buf.len) { | |
703 | struct strbuf arg = STRBUF_INIT; | |
704 | strbuf_addstr(&arg, "--export-marks="); | |
705 | strbuf_addbuf(&arg, &buf); | |
706 | export_marks = strbuf_detach(&arg, NULL); | |
707 | } | |
708 | ||
709 | recvline(data, &buf); | |
710 | if (debug) | |
711 | fprintf(stderr, "Debug: Got import_marks '%s'\n", buf.buf); | |
712 | if (buf.len) { | |
713 | struct strbuf arg = STRBUF_INIT; | |
714 | strbuf_addstr(&arg, "--import-marks="); | |
715 | strbuf_addbuf(&arg, &buf); | |
716 | import_marks = strbuf_detach(&arg, NULL); | |
717 | } | |
718 | ||
719 | strbuf_reset(&buf); | |
720 | ||
721 | for (ref = remote_refs; ref; ref = ref->next) { | |
722 | char *private; | |
723 | unsigned char sha1[20]; | |
724 | ||
725 | if (!data->refspecs) | |
726 | continue; | |
727 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); | |
728 | if (private && !get_sha1(private, sha1)) { | |
729 | strbuf_addf(&buf, "^%s", private); | |
730 | string_list_append(&revlist_args, strbuf_detach(&buf, NULL)); | |
731 | } | |
732 | ||
733 | string_list_append(&revlist_args, ref->name); | |
734 | ||
735 | } | |
736 | ||
737 | if (get_exporter(transport, &exporter, | |
738 | export_marks, import_marks, &revlist_args)) | |
739 | die("Couldn't run fast-export"); | |
740 | ||
741 | data->no_disconnect_req = 1; | |
742 | finish_command(&exporter); | |
743 | disconnect_helper(transport); | |
744 | return 0; | |
745 | } | |
746 | ||
747 | static int push_refs(struct transport *transport, | |
748 | struct ref *remote_refs, int flags) | |
749 | { | |
750 | struct helper_data *data = transport->data; | |
751 | ||
752 | if (process_connect(transport, 1)) { | |
753 | do_take_over(transport); | |
754 | return transport->push_refs(transport, remote_refs, flags); | |
755 | } | |
756 | ||
757 | if (!remote_refs) { | |
758 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
759 | "Perhaps you should specify a branch such as 'master'.\n"); | |
760 | return 0; | |
761 | } | |
762 | ||
763 | if (data->push) | |
764 | return push_refs_with_push(transport, remote_refs, flags); | |
765 | ||
766 | if (data->export) | |
767 | return push_refs_with_export(transport, remote_refs, flags); | |
768 | ||
769 | return -1; | |
770 | } | |
771 | ||
772 | ||
773 | static int has_attribute(const char *attrs, const char *attr) { | |
774 | int len; | |
775 | if (!attrs) | |
776 | return 0; | |
777 | ||
778 | len = strlen(attr); | |
779 | for (;;) { | |
780 | const char *space = strchrnul(attrs, ' '); | |
781 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
782 | return 1; | |
783 | if (!*space) | |
784 | return 0; | |
785 | attrs = space + 1; | |
786 | } | |
787 | } | |
788 | ||
789 | static struct ref *get_refs_list(struct transport *transport, int for_push) | |
790 | { | |
791 | struct helper_data *data = transport->data; | |
792 | struct child_process *helper; | |
793 | struct ref *ret = NULL; | |
794 | struct ref **tail = &ret; | |
795 | struct ref *posn; | |
796 | struct strbuf buf = STRBUF_INIT; | |
797 | ||
798 | helper = get_helper(transport); | |
799 | ||
800 | if (process_connect(transport, for_push)) { | |
801 | do_take_over(transport); | |
802 | return transport->get_refs_list(transport, for_push); | |
803 | } | |
804 | ||
805 | if (data->push && for_push) | |
806 | write_str_in_full(helper->in, "list for-push\n"); | |
807 | else | |
808 | write_str_in_full(helper->in, "list\n"); | |
809 | ||
810 | while (1) { | |
811 | char *eov, *eon; | |
812 | recvline(data, &buf); | |
813 | ||
814 | if (!*buf.buf) | |
815 | break; | |
816 | ||
817 | eov = strchr(buf.buf, ' '); | |
818 | if (!eov) | |
819 | die("Malformed response in ref list: %s", buf.buf); | |
820 | eon = strchr(eov + 1, ' '); | |
821 | *eov = '\0'; | |
822 | if (eon) | |
823 | *eon = '\0'; | |
824 | *tail = alloc_ref(eov + 1); | |
825 | if (buf.buf[0] == '@') | |
826 | (*tail)->symref = xstrdup(buf.buf + 1); | |
827 | else if (buf.buf[0] != '?') | |
828 | get_sha1_hex(buf.buf, (*tail)->old_sha1); | |
829 | if (eon) { | |
830 | if (has_attribute(eon + 1, "unchanged")) { | |
831 | (*tail)->status |= REF_STATUS_UPTODATE; | |
832 | read_ref((*tail)->name, (*tail)->old_sha1); | |
833 | } | |
834 | } | |
835 | tail = &((*tail)->next); | |
836 | } | |
837 | if (debug) | |
838 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
839 | strbuf_release(&buf); | |
840 | ||
841 | for (posn = ret; posn; posn = posn->next) | |
842 | resolve_remote_symref(posn, ret); | |
843 | ||
844 | return ret; | |
845 | } | |
846 | ||
847 | int transport_helper_init(struct transport *transport, const char *name) | |
848 | { | |
849 | struct helper_data *data = xcalloc(sizeof(*data), 1); | |
850 | data->name = name; | |
851 | ||
852 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) | |
853 | debug = 1; | |
854 | ||
855 | transport->data = data; | |
856 | transport->set_option = set_helper_option; | |
857 | transport->get_refs_list = get_refs_list; | |
858 | transport->fetch = fetch; | |
859 | transport->push_refs = push_refs; | |
860 | transport->disconnect = release_helper; | |
861 | transport->connect = connect_helper; | |
862 | transport->smart_options = &(data->transport_options); | |
863 | return 0; | |
864 | } |