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Commit | Line | Data |
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6eb996b5 DB |
1 | #include "cache.h" |
2 | #include "transport.h" | |
ae4efe19 | 3 | #include "quote.h" |
6eb996b5 DB |
4 | #include "run-command.h" |
5 | #include "commit.h" | |
6 | #include "diff.h" | |
7 | #include "revision.h" | |
72ff8943 | 8 | #include "remote.h" |
73b49a75 | 9 | #include "string-list.h" |
7851b1e6 | 10 | #include "thread-utils.h" |
c34fe630 | 11 | #include "sigchain.h" |
bfc366d9 | 12 | #include "argv-array.h" |
664059fb | 13 | #include "refs.h" |
ec0cb496 | 14 | #include "refspec.h" |
e967ca38 | 15 | #include "transport-internal.h" |
edc9caf7 | 16 | #include "protocol.h" |
7851b1e6 | 17 | |
bf3c523c IL |
18 | static int debug; |
19 | ||
9cba13ca | 20 | struct helper_data { |
6eb996b5 DB |
21 | const char *name; |
22 | struct child_process *helper; | |
292ce46b | 23 | FILE *out; |
ef08ef9e | 24 | unsigned fetch : 1, |
a24a32dd | 25 | import : 1, |
bfc366d9 | 26 | bidi_import : 1, |
73b49a75 | 27 | export : 1, |
ae4efe19 | 28 | option : 1, |
fa8c097c IL |
29 | push : 1, |
30 | connect : 1, | |
edc9caf7 | 31 | stateless_connect : 1, |
0d957a4d | 32 | signed_tags : 1, |
9ba38048 | 33 | check_connectivity : 1, |
597b831a MM |
34 | no_disconnect_req : 1, |
35 | no_private_update : 1; | |
a515ebe9 SR |
36 | char *export_marks; |
37 | char *import_marks; | |
72ff8943 | 38 | /* These go from remote name (as in "list") to private name */ |
57f32ac2 | 39 | struct refspec rs; |
61b075bd IL |
40 | /* Transport options for fetch-pack/send-pack (should one of |
41 | * those be invoked). | |
42 | */ | |
43 | struct git_transport_options transport_options; | |
6eb996b5 DB |
44 | }; |
45 | ||
bf3c523c IL |
46 | static void sendline(struct helper_data *helper, struct strbuf *buffer) |
47 | { | |
48 | if (debug) | |
49 | fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf); | |
06f46f23 | 50 | if (write_in_full(helper->helper->in, buffer->buf, buffer->len) < 0) |
6b5b309f | 51 | die_errno(_("full write to remote helper failed")); |
bf3c523c IL |
52 | } |
53 | ||
b1c2edfc | 54 | static int recvline_fh(FILE *helper, struct strbuf *buffer) |
bf3c523c IL |
55 | { |
56 | strbuf_reset(buffer); | |
57 | if (debug) | |
58 | fprintf(stderr, "Debug: Remote helper: Waiting...\n"); | |
692dfdfa | 59 | if (strbuf_getline(buffer, helper) == EOF) { |
bf3c523c IL |
60 | if (debug) |
61 | fprintf(stderr, "Debug: Remote helper quit.\n"); | |
5931b33e | 62 | return 1; |
bf3c523c IL |
63 | } |
64 | ||
65 | if (debug) | |
66 | fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf); | |
67 | return 0; | |
68 | } | |
69 | ||
fa8c097c IL |
70 | static int recvline(struct helper_data *helper, struct strbuf *buffer) |
71 | { | |
b1c2edfc | 72 | return recvline_fh(helper->out, buffer); |
fa8c097c IL |
73 | } |
74 | ||
bf3c523c IL |
75 | static void write_constant(int fd, const char *str) |
76 | { | |
77 | if (debug) | |
78 | fprintf(stderr, "Debug: Remote helper: -> %s", str); | |
06f46f23 | 79 | if (write_in_full(fd, str, strlen(str)) < 0) |
6b5b309f | 80 | die_errno(_("full write to remote helper failed")); |
bf3c523c IL |
81 | } |
82 | ||
c2e86add | 83 | static const char *remove_ext_force(const char *url) |
25d5cc48 IL |
84 | { |
85 | if (url) { | |
86 | const char *colon = strchr(url, ':'); | |
87 | if (colon && colon[1] == ':') | |
88 | return colon + 2; | |
89 | } | |
90 | return url; | |
91 | } | |
92 | ||
fa8c097c IL |
93 | static void do_take_over(struct transport *transport) |
94 | { | |
95 | struct helper_data *data; | |
96 | data = (struct helper_data *)transport->data; | |
97 | transport_take_over(transport, data->helper); | |
98 | fclose(data->out); | |
99 | free(data); | |
100 | } | |
101 | ||
2879bc3b MH |
102 | static void standard_options(struct transport *t); |
103 | ||
6eb996b5 DB |
104 | static struct child_process *get_helper(struct transport *transport) |
105 | { | |
106 | struct helper_data *data = transport->data; | |
107 | struct strbuf buf = STRBUF_INIT; | |
108 | struct child_process *helper; | |
61b075bd | 109 | int duped; |
6b02de3b | 110 | int code; |
6eb996b5 DB |
111 | |
112 | if (data->helper) | |
113 | return data->helper; | |
114 | ||
483bbd4e RS |
115 | helper = xmalloc(sizeof(*helper)); |
116 | child_process_init(helper); | |
6eb996b5 DB |
117 | helper->in = -1; |
118 | helper->out = -1; | |
119 | helper->err = 0; | |
e0ab2ac6 JK |
120 | argv_array_pushf(&helper->args, "git-remote-%s", data->name); |
121 | argv_array_push(&helper->args, transport->remote->name); | |
122 | argv_array_push(&helper->args, remove_ext_force(transport->url)); | |
6b02de3b IL |
123 | helper->git_cmd = 0; |
124 | helper->silent_exec_failure = 1; | |
e1735872 | 125 | |
4b0c3c77 JN |
126 | if (have_git_dir()) |
127 | argv_array_pushf(&helper->env_array, "%s=%s", | |
128 | GIT_DIR_ENVIRONMENT, get_git_dir()); | |
e1735872 | 129 | |
6b02de3b IL |
130 | code = start_command(helper); |
131 | if (code < 0 && errno == ENOENT) | |
6b5b309f | 132 | die(_("unable to find remote helper for '%s'"), data->name); |
6b02de3b IL |
133 | else if (code != 0) |
134 | exit(code); | |
135 | ||
6eb996b5 | 136 | data->helper = helper; |
fa8c097c | 137 | data->no_disconnect_req = 0; |
57f32ac2 | 138 | refspec_init(&data->rs, REFSPEC_FETCH); |
6eb996b5 | 139 | |
61b075bd | 140 | /* |
1a0c8dfd JH |
141 | * Open the output as FILE* so strbuf_getline_*() family of |
142 | * functions can be used. | |
61b075bd IL |
143 | * Do this with duped fd because fclose() will close the fd, |
144 | * and stuff like taking over will require the fd to remain. | |
61b075bd IL |
145 | */ |
146 | duped = dup(helper->out); | |
147 | if (duped < 0) | |
6b5b309f | 148 | die_errno(_("can't dup helper output fd")); |
61b075bd IL |
149 | data->out = xfdopen(duped, "r"); |
150 | ||
bf3c523c | 151 | write_constant(helper->in, "capabilities\n"); |
2d14d65c | 152 | |
6eb996b5 | 153 | while (1) { |
21a2d4ad | 154 | const char *capname, *arg; |
28ed5b35 | 155 | int mandatory = 0; |
5931b33e FC |
156 | if (recvline(data, &buf)) |
157 | exit(128); | |
6eb996b5 DB |
158 | |
159 | if (!*buf.buf) | |
160 | break; | |
28ed5b35 IL |
161 | |
162 | if (*buf.buf == '*') { | |
163 | capname = buf.buf + 1; | |
164 | mandatory = 1; | |
165 | } else | |
166 | capname = buf.buf; | |
167 | ||
bf3c523c | 168 | if (debug) |
28ed5b35 IL |
169 | fprintf(stderr, "Debug: Got cap %s\n", capname); |
170 | if (!strcmp(capname, "fetch")) | |
6eb996b5 | 171 | data->fetch = 1; |
28ed5b35 | 172 | else if (!strcmp(capname, "option")) |
ef08ef9e | 173 | data->option = 1; |
28ed5b35 | 174 | else if (!strcmp(capname, "push")) |
ae4efe19 | 175 | data->push = 1; |
28ed5b35 | 176 | else if (!strcmp(capname, "import")) |
e65e91ed | 177 | data->import = 1; |
bfc366d9 FA |
178 | else if (!strcmp(capname, "bidi-import")) |
179 | data->bidi_import = 1; | |
73b49a75 SR |
180 | else if (!strcmp(capname, "export")) |
181 | data->export = 1; | |
9ba38048 NTND |
182 | else if (!strcmp(capname, "check-connectivity")) |
183 | data->check_connectivity = 1; | |
57f32ac2 BW |
184 | else if (skip_prefix(capname, "refspec ", &arg)) { |
185 | refspec_append(&data->rs, arg); | |
fa8c097c IL |
186 | } else if (!strcmp(capname, "connect")) { |
187 | data->connect = 1; | |
edc9caf7 BW |
188 | } else if (!strcmp(capname, "stateless-connect")) { |
189 | data->stateless_connect = 1; | |
0d957a4d JK |
190 | } else if (!strcmp(capname, "signed-tags")) { |
191 | data->signed_tags = 1; | |
21a2d4ad JK |
192 | } else if (skip_prefix(capname, "export-marks ", &arg)) { |
193 | data->export_marks = xstrdup(arg); | |
194 | } else if (skip_prefix(capname, "import-marks ", &arg)) { | |
195 | data->import_marks = xstrdup(arg); | |
59556548 | 196 | } else if (starts_with(capname, "no-private-update")) { |
597b831a | 197 | data->no_private_update = 1; |
28ed5b35 | 198 | } else if (mandatory) { |
6b5b309f NTND |
199 | die(_("unknown mandatory capability %s; this remote " |
200 | "helper probably needs newer version of Git"), | |
28ed5b35 | 201 | capname); |
72ff8943 DB |
202 | } |
203 | } | |
57f32ac2 | 204 | if (!data->rs.nr && (data->import || data->bidi_import || data->export)) { |
6b5b309f | 205 | warning(_("this remote helper should implement refspec capability")); |
6eb996b5 | 206 | } |
b962dbdc | 207 | strbuf_release(&buf); |
bf3c523c IL |
208 | if (debug) |
209 | fprintf(stderr, "Debug: Capabilities complete.\n"); | |
2879bc3b | 210 | standard_options(transport); |
6eb996b5 DB |
211 | return data->helper; |
212 | } | |
213 | ||
214 | static int disconnect_helper(struct transport *transport) | |
215 | { | |
216 | struct helper_data *data = transport->data; | |
cc567322 | 217 | int res = 0; |
bf3c523c | 218 | |
6eb996b5 | 219 | if (data->helper) { |
bf3c523c IL |
220 | if (debug) |
221 | fprintf(stderr, "Debug: Disconnecting.\n"); | |
fa8c097c | 222 | if (!data->no_disconnect_req) { |
c34fe630 JK |
223 | /* |
224 | * Ignore write errors; there's nothing we can do, | |
225 | * since we're about to close the pipe anyway. And the | |
226 | * most likely error is EPIPE due to the helper dying | |
227 | * to report an error itself. | |
228 | */ | |
229 | sigchain_push(SIGPIPE, SIG_IGN); | |
230 | xwrite(data->helper->in, "\n", 1); | |
231 | sigchain_pop(SIGPIPE); | |
fa8c097c | 232 | } |
6eb996b5 | 233 | close(data->helper->in); |
61b075bd | 234 | close(data->helper->out); |
292ce46b | 235 | fclose(data->out); |
cc567322 | 236 | res = finish_command(data->helper); |
6a83d902 | 237 | FREE_AND_NULL(data->helper); |
6eb996b5 | 238 | } |
cc567322 | 239 | return res; |
6eb996b5 DB |
240 | } |
241 | ||
ef08ef9e SP |
242 | static const char *unsupported_options[] = { |
243 | TRANS_OPT_UPLOADPACK, | |
244 | TRANS_OPT_RECEIVEPACK, | |
245 | TRANS_OPT_THIN, | |
246 | TRANS_OPT_KEEP | |
247 | }; | |
23cd01ec | 248 | |
ef08ef9e SP |
249 | static const char *boolean_options[] = { |
250 | TRANS_OPT_THIN, | |
251 | TRANS_OPT_KEEP, | |
0ea47f9d | 252 | TRANS_OPT_FOLLOWTAGS, |
cccf74e2 | 253 | TRANS_OPT_DEEPEN_RELATIVE |
ef08ef9e SP |
254 | }; |
255 | ||
9318c5dd NTND |
256 | static int strbuf_set_helper_option(struct helper_data *data, |
257 | struct strbuf *buf) | |
258 | { | |
259 | int ret; | |
260 | ||
261 | sendline(data, buf); | |
262 | if (recvline(data, buf)) | |
263 | exit(128); | |
264 | ||
265 | if (!strcmp(buf->buf, "ok")) | |
266 | ret = 0; | |
267 | else if (starts_with(buf->buf, "error")) | |
268 | ret = -1; | |
269 | else if (!strcmp(buf->buf, "unsupported")) | |
270 | ret = 1; | |
271 | else { | |
6b5b309f | 272 | warning(_("%s unexpectedly said: '%s'"), data->name, buf->buf); |
9318c5dd NTND |
273 | ret = 1; |
274 | } | |
275 | return ret; | |
276 | } | |
277 | ||
a45a2600 NTND |
278 | static int string_list_set_helper_option(struct helper_data *data, |
279 | const char *name, | |
280 | struct string_list *list) | |
281 | { | |
282 | struct strbuf buf = STRBUF_INIT; | |
283 | int i, ret = 0; | |
284 | ||
285 | for (i = 0; i < list->nr; i++) { | |
286 | strbuf_addf(&buf, "option %s ", name); | |
287 | quote_c_style(list->items[i].string, &buf, NULL, 0); | |
288 | strbuf_addch(&buf, '\n'); | |
289 | ||
290 | if ((ret = strbuf_set_helper_option(data, &buf))) | |
291 | break; | |
292 | strbuf_reset(&buf); | |
293 | } | |
294 | strbuf_release(&buf); | |
295 | return ret; | |
296 | } | |
297 | ||
ef08ef9e SP |
298 | static int set_helper_option(struct transport *transport, |
299 | const char *name, const char *value) | |
300 | { | |
301 | struct helper_data *data = transport->data; | |
ef08ef9e SP |
302 | struct strbuf buf = STRBUF_INIT; |
303 | int i, ret, is_bool = 0; | |
304 | ||
bf3c523c IL |
305 | get_helper(transport); |
306 | ||
ef08ef9e SP |
307 | if (!data->option) |
308 | return 1; | |
309 | ||
a45a2600 NTND |
310 | if (!strcmp(name, "deepen-not")) |
311 | return string_list_set_helper_option(data, name, | |
312 | (struct string_list *)value); | |
313 | ||
ef08ef9e SP |
314 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { |
315 | if (!strcmp(name, unsupported_options[i])) | |
316 | return 1; | |
317 | } | |
318 | ||
319 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
320 | if (!strcmp(name, boolean_options[i])) { | |
321 | is_bool = 1; | |
322 | break; | |
323 | } | |
324 | } | |
325 | ||
326 | strbuf_addf(&buf, "option %s ", name); | |
327 | if (is_bool) | |
328 | strbuf_addstr(&buf, value ? "true" : "false"); | |
329 | else | |
330 | quote_c_style(value, &buf, NULL, 0); | |
331 | strbuf_addch(&buf, '\n'); | |
332 | ||
9318c5dd | 333 | ret = strbuf_set_helper_option(data, &buf); |
ef08ef9e SP |
334 | strbuf_release(&buf); |
335 | return ret; | |
336 | } | |
337 | ||
338 | static void standard_options(struct transport *t) | |
339 | { | |
340 | char buf[16]; | |
ef08ef9e | 341 | int v = t->verbose; |
ef08ef9e | 342 | |
d01b3c02 | 343 | set_helper_option(t, "progress", t->progress ? "true" : "false"); |
ef08ef9e | 344 | |
8c5acfb9 | 345 | xsnprintf(buf, sizeof(buf), "%d", v + 1); |
ef08ef9e | 346 | set_helper_option(t, "verbosity", buf); |
c915f11e EW |
347 | |
348 | switch (t->family) { | |
349 | case TRANSPORT_FAMILY_ALL: | |
350 | /* | |
351 | * this is already the default, | |
352 | * do not break old remote helpers by setting "all" here | |
353 | */ | |
354 | break; | |
355 | case TRANSPORT_FAMILY_IPV4: | |
356 | set_helper_option(t, "family", "ipv4"); | |
357 | break; | |
358 | case TRANSPORT_FAMILY_IPV6: | |
359 | set_helper_option(t, "family", "ipv6"); | |
360 | break; | |
361 | } | |
ef08ef9e SP |
362 | } |
363 | ||
f2a37151 DB |
364 | static int release_helper(struct transport *transport) |
365 | { | |
cc567322 | 366 | int res = 0; |
72ff8943 | 367 | struct helper_data *data = transport->data; |
57f32ac2 | 368 | refspec_clear(&data->rs); |
cc567322 | 369 | res = disconnect_helper(transport); |
f2a37151 | 370 | free(transport->data); |
cc567322 | 371 | return res; |
f2a37151 DB |
372 | } |
373 | ||
6eb996b5 | 374 | static int fetch_with_fetch(struct transport *transport, |
37148311 | 375 | int nr_heads, struct ref **to_fetch) |
6eb996b5 | 376 | { |
292ce46b | 377 | struct helper_data *data = transport->data; |
6eb996b5 DB |
378 | int i; |
379 | struct strbuf buf = STRBUF_INIT; | |
380 | ||
381 | for (i = 0; i < nr_heads; i++) { | |
1088261f | 382 | const struct ref *posn = to_fetch[i]; |
6eb996b5 DB |
383 | if (posn->status & REF_STATUS_UPTODATE) |
384 | continue; | |
2d14d65c DB |
385 | |
386 | strbuf_addf(&buf, "fetch %s %s\n", | |
f4e54d02 | 387 | oid_to_hex(&posn->old_oid), |
33cae542 | 388 | posn->symref ? posn->symref : posn->name); |
292ce46b | 389 | } |
2d14d65c | 390 | |
292ce46b | 391 | strbuf_addch(&buf, '\n'); |
bf3c523c | 392 | sendline(data, &buf); |
292ce46b SP |
393 | |
394 | while (1) { | |
5931b33e FC |
395 | if (recvline(data, &buf)) |
396 | exit(128); | |
292ce46b | 397 | |
59556548 | 398 | if (starts_with(buf.buf, "lock ")) { |
292ce46b SP |
399 | const char *name = buf.buf + 5; |
400 | if (transport->pack_lockfile) | |
6b5b309f | 401 | warning(_("%s also locked %s"), data->name, name); |
292ce46b SP |
402 | else |
403 | transport->pack_lockfile = xstrdup(name); | |
404 | } | |
9ba38048 NTND |
405 | else if (data->check_connectivity && |
406 | data->transport_options.check_self_contained_and_connected && | |
407 | !strcmp(buf.buf, "connectivity-ok")) | |
408 | data->transport_options.self_contained_and_connected = 1; | |
292ce46b SP |
409 | else if (!buf.len) |
410 | break; | |
411 | else | |
6b5b309f | 412 | warning(_("%s unexpectedly said: '%s'"), data->name, buf.buf); |
6eb996b5 | 413 | } |
292ce46b | 414 | strbuf_release(&buf); |
6eb996b5 DB |
415 | return 0; |
416 | } | |
417 | ||
e65e91ed DB |
418 | static int get_importer(struct transport *transport, struct child_process *fastimport) |
419 | { | |
420 | struct child_process *helper = get_helper(transport); | |
bfc366d9 | 421 | struct helper_data *data = transport->data; |
bfc366d9 | 422 | int cat_blob_fd, code; |
483bbd4e | 423 | child_process_init(fastimport); |
e65e91ed | 424 | fastimport->in = helper->out; |
173fd1a1 JK |
425 | argv_array_push(&fastimport->args, "fast-import"); |
426 | argv_array_push(&fastimport->args, debug ? "--stats" : "--quiet"); | |
e65e91ed | 427 | |
bfc366d9 FA |
428 | if (data->bidi_import) { |
429 | cat_blob_fd = xdup(helper->in); | |
173fd1a1 | 430 | argv_array_pushf(&fastimport->args, "--cat-blob-fd=%d", cat_blob_fd); |
bfc366d9 | 431 | } |
e65e91ed | 432 | fastimport->git_cmd = 1; |
bfc366d9 FA |
433 | |
434 | code = start_command(fastimport); | |
435 | return code; | |
e65e91ed DB |
436 | } |
437 | ||
73b49a75 SR |
438 | static int get_exporter(struct transport *transport, |
439 | struct child_process *fastexport, | |
73b49a75 SR |
440 | struct string_list *revlist_args) |
441 | { | |
a515ebe9 | 442 | struct helper_data *data = transport->data; |
73b49a75 | 443 | struct child_process *helper = get_helper(transport); |
2aeae40a | 444 | int i; |
852e54bc | 445 | |
8828f298 | 446 | child_process_init(fastexport); |
73b49a75 SR |
447 | |
448 | /* we need to duplicate helper->in because we want to use it after | |
449 | * fastexport is done with it. */ | |
450 | fastexport->out = dup(helper->in); | |
2aeae40a JK |
451 | argv_array_push(&fastexport->args, "fast-export"); |
452 | argv_array_push(&fastexport->args, "--use-done-feature"); | |
453 | argv_array_push(&fastexport->args, data->signed_tags ? | |
454 | "--signed-tags=verbatim" : "--signed-tags=warn-strip"); | |
455 | if (data->export_marks) | |
456 | argv_array_pushf(&fastexport->args, "--export-marks=%s.tmp", data->export_marks); | |
457 | if (data->import_marks) | |
458 | argv_array_pushf(&fastexport->args, "--import-marks=%s", data->import_marks); | |
73b49a75 SR |
459 | |
460 | for (i = 0; i < revlist_args->nr; i++) | |
2aeae40a | 461 | argv_array_push(&fastexport->args, revlist_args->items[i].string); |
73b49a75 SR |
462 | |
463 | fastexport->git_cmd = 1; | |
464 | return start_command(fastexport); | |
465 | } | |
466 | ||
e65e91ed DB |
467 | static int fetch_with_import(struct transport *transport, |
468 | int nr_heads, struct ref **to_fetch) | |
469 | { | |
470 | struct child_process fastimport; | |
72ff8943 | 471 | struct helper_data *data = transport->data; |
e65e91ed DB |
472 | int i; |
473 | struct ref *posn; | |
474 | struct strbuf buf = STRBUF_INIT; | |
475 | ||
bf3c523c IL |
476 | get_helper(transport); |
477 | ||
e65e91ed | 478 | if (get_importer(transport, &fastimport)) |
6b5b309f | 479 | die(_("couldn't run fast-import")); |
e65e91ed DB |
480 | |
481 | for (i = 0; i < nr_heads; i++) { | |
482 | posn = to_fetch[i]; | |
483 | if (posn->status & REF_STATUS_UPTODATE) | |
484 | continue; | |
485 | ||
33cae542 MH |
486 | strbuf_addf(&buf, "import %s\n", |
487 | posn->symref ? posn->symref : posn->name); | |
bf3c523c | 488 | sendline(data, &buf); |
e65e91ed DB |
489 | strbuf_reset(&buf); |
490 | } | |
9504bc9d SR |
491 | |
492 | write_constant(data->helper->in, "\n"); | |
bfc366d9 FA |
493 | /* |
494 | * remote-helpers that advertise the bidi-import capability are required to | |
495 | * buffer the complete batch of import commands until this newline before | |
496 | * sending data to fast-import. | |
497 | * These helpers read back data from fast-import on their stdin, which could | |
498 | * be mixed with import commands, otherwise. | |
499 | */ | |
9504bc9d | 500 | |
cc567322 | 501 | if (finish_command(&fastimport)) |
6b5b309f | 502 | die(_("error while running fast-import")); |
e65e91ed | 503 | |
dff9d65d FA |
504 | /* |
505 | * The fast-import stream of a remote helper that advertises | |
506 | * the "refspec" capability writes to the refs named after the | |
507 | * right hand side of the first refspec matching each ref we | |
508 | * were fetching. | |
509 | * | |
510 | * (If no "refspec" capability was specified, for historical | |
7a43c554 | 511 | * reasons we default to the equivalent of *:*.) |
dff9d65d FA |
512 | * |
513 | * Store the result in to_fetch[i].old_sha1. Callers such | |
514 | * as "git fetch" can use the value to write feedback to the | |
515 | * terminal, populate FETCH_HEAD, and determine what new value | |
516 | * should be written to peer_ref if the update is a | |
517 | * fast-forward or this is a forced update. | |
518 | */ | |
e65e91ed | 519 | for (i = 0; i < nr_heads; i++) { |
33cae542 | 520 | char *private, *name; |
e65e91ed DB |
521 | posn = to_fetch[i]; |
522 | if (posn->status & REF_STATUS_UPTODATE) | |
523 | continue; | |
33cae542 | 524 | name = posn->symref ? posn->symref : posn->name; |
57f32ac2 | 525 | if (data->rs.nr) |
d000414e | 526 | private = apply_refspecs(&data->rs, name); |
72ff8943 | 527 | else |
33cae542 | 528 | private = xstrdup(name); |
d51b720f | 529 | if (private) { |
34c290a6 | 530 | if (read_ref(private, &posn->old_oid) < 0) |
6b5b309f | 531 | die(_("could not read ref %s"), private); |
d51b720f MH |
532 | free(private); |
533 | } | |
e65e91ed | 534 | } |
b962dbdc | 535 | strbuf_release(&buf); |
e65e91ed DB |
536 | return 0; |
537 | } | |
538 | ||
176e85c1 | 539 | static int run_connect(struct transport *transport, struct strbuf *cmdbuf) |
fa8c097c IL |
540 | { |
541 | struct helper_data *data = transport->data; | |
176e85c1 BW |
542 | int ret = 0; |
543 | int duped; | |
fa8c097c | 544 | FILE *input; |
176e85c1 | 545 | struct child_process *helper; |
fa8c097c IL |
546 | |
547 | helper = get_helper(transport); | |
548 | ||
549 | /* | |
550 | * Yes, dup the pipe another time, as we need unbuffered version | |
551 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
552 | * stream buffering only can be changed before first I/O operation | |
553 | * on it. | |
554 | */ | |
555 | duped = dup(helper->out); | |
556 | if (duped < 0) | |
6b5b309f | 557 | die_errno(_("can't dup helper output fd")); |
fa8c097c IL |
558 | input = xfdopen(duped, "r"); |
559 | setvbuf(input, NULL, _IONBF, 0); | |
560 | ||
176e85c1 BW |
561 | sendline(data, cmdbuf); |
562 | if (recvline_fh(input, cmdbuf)) | |
563 | exit(128); | |
564 | ||
565 | if (!strcmp(cmdbuf->buf, "")) { | |
566 | data->no_disconnect_req = 1; | |
567 | if (debug) | |
568 | fprintf(stderr, "Debug: Smart transport connection " | |
569 | "ready.\n"); | |
570 | ret = 1; | |
571 | } else if (!strcmp(cmdbuf->buf, "fallback")) { | |
572 | if (debug) | |
573 | fprintf(stderr, "Debug: Falling back to dumb " | |
574 | "transport.\n"); | |
575 | } else { | |
6b5b309f NTND |
576 | die(_(_("unknown response to connect: %s")), |
577 | cmdbuf->buf); | |
176e85c1 BW |
578 | } |
579 | ||
580 | fclose(input); | |
581 | return ret; | |
582 | } | |
583 | ||
584 | static int process_connect_service(struct transport *transport, | |
585 | const char *name, const char *exec) | |
586 | { | |
587 | struct helper_data *data = transport->data; | |
588 | struct strbuf cmdbuf = STRBUF_INIT; | |
589 | int ret = 0; | |
590 | ||
fa8c097c IL |
591 | /* |
592 | * Handle --upload-pack and friends. This is fire and forget... | |
593 | * just warn if it fails. | |
594 | */ | |
595 | if (strcmp(name, exec)) { | |
176e85c1 | 596 | int r = set_helper_option(transport, "servpath", exec); |
fa8c097c | 597 | if (r > 0) |
6b5b309f | 598 | warning(_("setting remote service path not supported by protocol")); |
fa8c097c | 599 | else if (r < 0) |
6b5b309f | 600 | warning(_("invalid remote service path")); |
fa8c097c IL |
601 | } |
602 | ||
176e85c1 | 603 | if (data->connect) { |
fa8c097c | 604 | strbuf_addf(&cmdbuf, "connect %s\n", name); |
176e85c1 | 605 | ret = run_connect(transport, &cmdbuf); |
edc9caf7 BW |
606 | } else if (data->stateless_connect && |
607 | (get_protocol_version_config() == protocol_v2) && | |
608 | !strcmp("git-upload-pack", name)) { | |
609 | strbuf_addf(&cmdbuf, "stateless-connect %s\n", name); | |
610 | ret = run_connect(transport, &cmdbuf); | |
611 | if (ret) | |
612 | transport->stateless_rpc = 1; | |
176e85c1 | 613 | } |
fa8c097c | 614 | |
4168be8e | 615 | strbuf_release(&cmdbuf); |
fa8c097c IL |
616 | return ret; |
617 | } | |
618 | ||
619 | static int process_connect(struct transport *transport, | |
620 | int for_push) | |
621 | { | |
622 | struct helper_data *data = transport->data; | |
623 | const char *name; | |
624 | const char *exec; | |
625 | ||
626 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
627 | if (for_push) | |
628 | exec = data->transport_options.receivepack; | |
629 | else | |
630 | exec = data->transport_options.uploadpack; | |
631 | ||
632 | return process_connect_service(transport, name, exec); | |
633 | } | |
634 | ||
b236752a IL |
635 | static int connect_helper(struct transport *transport, const char *name, |
636 | const char *exec, int fd[2]) | |
637 | { | |
638 | struct helper_data *data = transport->data; | |
639 | ||
640 | /* Get_helper so connect is inited. */ | |
641 | get_helper(transport); | |
642 | if (!data->connect) | |
6b5b309f | 643 | die(_("operation not supported by protocol")); |
b236752a IL |
644 | |
645 | if (!process_connect_service(transport, name, exec)) | |
6b5b309f | 646 | die(_("can't connect to subservice %s"), name); |
b236752a IL |
647 | |
648 | fd[0] = data->helper->out; | |
649 | fd[1] = data->helper->in; | |
650 | return 0; | |
651 | } | |
652 | ||
6eb996b5 | 653 | static int fetch(struct transport *transport, |
e2842b39 | 654 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
655 | { |
656 | struct helper_data *data = transport->data; | |
657 | int i, count; | |
658 | ||
fa8c097c IL |
659 | if (process_connect(transport, 0)) { |
660 | do_take_over(transport); | |
e2842b39 | 661 | return transport->vtable->fetch(transport, nr_heads, to_fetch); |
fa8c097c IL |
662 | } |
663 | ||
6eb996b5 DB |
664 | count = 0; |
665 | for (i = 0; i < nr_heads; i++) | |
666 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
667 | count++; | |
668 | ||
669 | if (!count) | |
670 | return 0; | |
671 | ||
aab1beb0 MH |
672 | if (data->check_connectivity && |
673 | data->transport_options.check_self_contained_and_connected) | |
674 | set_helper_option(transport, "check-connectivity", "true"); | |
675 | ||
676 | if (transport->cloning) | |
677 | set_helper_option(transport, "cloning", "true"); | |
678 | ||
679 | if (data->transport_options.update_shallow) | |
680 | set_helper_option(transport, "update-shallow", "true"); | |
681 | ||
640d8b72 JH |
682 | if (data->transport_options.filter_options.choice) |
683 | set_helper_option( | |
684 | transport, "filter", | |
685 | data->transport_options.filter_options.filter_spec); | |
686 | ||
3390e42a JT |
687 | if (data->transport_options.negotiation_tips) |
688 | warning("Ignoring --negotiation-tip because the protocol does not support it."); | |
689 | ||
6eb996b5 DB |
690 | if (data->fetch) |
691 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
692 | ||
e65e91ed DB |
693 | if (data->import) |
694 | return fetch_with_import(transport, nr_heads, to_fetch); | |
695 | ||
6eb996b5 DB |
696 | return -1; |
697 | } | |
698 | ||
664059fb | 699 | static int push_update_ref_status(struct strbuf *buf, |
d2e73c6f SR |
700 | struct ref **ref, |
701 | struct ref *remote_refs) | |
702 | { | |
703 | char *refname, *msg; | |
f9e3c6be | 704 | int status, forced = 0; |
d2e73c6f | 705 | |
59556548 | 706 | if (starts_with(buf->buf, "ok ")) { |
d2e73c6f SR |
707 | status = REF_STATUS_OK; |
708 | refname = buf->buf + 3; | |
59556548 | 709 | } else if (starts_with(buf->buf, "error ")) { |
d2e73c6f SR |
710 | status = REF_STATUS_REMOTE_REJECT; |
711 | refname = buf->buf + 6; | |
712 | } else | |
6b5b309f | 713 | die(_("expected ok/error, helper said '%s'"), buf->buf); |
d2e73c6f SR |
714 | |
715 | msg = strchr(refname, ' '); | |
716 | if (msg) { | |
717 | struct strbuf msg_buf = STRBUF_INIT; | |
718 | const char *end; | |
719 | ||
720 | *msg++ = '\0'; | |
721 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
722 | msg = strbuf_detach(&msg_buf, NULL); | |
723 | else | |
724 | msg = xstrdup(msg); | |
725 | strbuf_release(&msg_buf); | |
726 | ||
727 | if (!strcmp(msg, "no match")) { | |
728 | status = REF_STATUS_NONE; | |
6a83d902 | 729 | FREE_AND_NULL(msg); |
d2e73c6f SR |
730 | } |
731 | else if (!strcmp(msg, "up to date")) { | |
732 | status = REF_STATUS_UPTODATE; | |
6a83d902 | 733 | FREE_AND_NULL(msg); |
d2e73c6f SR |
734 | } |
735 | else if (!strcmp(msg, "non-fast forward")) { | |
736 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
6a83d902 | 737 | FREE_AND_NULL(msg); |
d2e73c6f | 738 | } |
dbfeddb1 CR |
739 | else if (!strcmp(msg, "already exists")) { |
740 | status = REF_STATUS_REJECT_ALREADY_EXISTS; | |
6a83d902 | 741 | FREE_AND_NULL(msg); |
dbfeddb1 | 742 | } |
75e5c0dc JH |
743 | else if (!strcmp(msg, "fetch first")) { |
744 | status = REF_STATUS_REJECT_FETCH_FIRST; | |
6a83d902 | 745 | FREE_AND_NULL(msg); |
75e5c0dc JH |
746 | } |
747 | else if (!strcmp(msg, "needs force")) { | |
748 | status = REF_STATUS_REJECT_NEEDS_FORCE; | |
6a83d902 | 749 | FREE_AND_NULL(msg); |
75e5c0dc | 750 | } |
631b5ef2 JH |
751 | else if (!strcmp(msg, "stale info")) { |
752 | status = REF_STATUS_REJECT_STALE; | |
6a83d902 | 753 | FREE_AND_NULL(msg); |
631b5ef2 | 754 | } |
f9e3c6be FC |
755 | else if (!strcmp(msg, "forced update")) { |
756 | forced = 1; | |
6a83d902 | 757 | FREE_AND_NULL(msg); |
f9e3c6be | 758 | } |
d2e73c6f SR |
759 | } |
760 | ||
761 | if (*ref) | |
762 | *ref = find_ref_by_name(*ref, refname); | |
763 | if (!*ref) | |
764 | *ref = find_ref_by_name(remote_refs, refname); | |
765 | if (!*ref) { | |
6b5b309f | 766 | warning(_("helper reported unexpected status of %s"), refname); |
664059fb | 767 | return 1; |
d2e73c6f SR |
768 | } |
769 | ||
770 | if ((*ref)->status != REF_STATUS_NONE) { | |
771 | /* | |
772 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
773 | * status reported by the remote helper if the latter is 'no match'. | |
774 | */ | |
775 | if (status == REF_STATUS_NONE) | |
664059fb | 776 | return 1; |
d2e73c6f SR |
777 | } |
778 | ||
779 | (*ref)->status = status; | |
cf31f70c | 780 | (*ref)->forced_update |= forced; |
d2e73c6f | 781 | (*ref)->remote_status = msg; |
126aac5c | 782 | return !(status == REF_STATUS_OK); |
d2e73c6f SR |
783 | } |
784 | ||
0551a06c | 785 | static int push_update_refs_status(struct helper_data *data, |
5a75353f FC |
786 | struct ref *remote_refs, |
787 | int flags) | |
d2e73c6f SR |
788 | { |
789 | struct strbuf buf = STRBUF_INIT; | |
790 | struct ref *ref = remote_refs; | |
0551a06c FC |
791 | int ret = 0; |
792 | ||
d2e73c6f | 793 | for (;;) { |
664059fb FC |
794 | char *private; |
795 | ||
0551a06c FC |
796 | if (recvline(data, &buf)) { |
797 | ret = 1; | |
798 | break; | |
799 | } | |
800 | ||
d2e73c6f SR |
801 | if (!buf.len) |
802 | break; | |
803 | ||
664059fb FC |
804 | if (push_update_ref_status(&buf, &ref, remote_refs)) |
805 | continue; | |
806 | ||
57f32ac2 | 807 | if (flags & TRANSPORT_PUSH_DRY_RUN || !data->rs.nr || data->no_private_update) |
664059fb FC |
808 | continue; |
809 | ||
810 | /* propagate back the update to the remote namespace */ | |
d000414e | 811 | private = apply_refspecs(&data->rs, ref->name); |
664059fb FC |
812 | if (!private) |
813 | continue; | |
ae077771 | 814 | update_ref("update by helper", private, &ref->new_oid, NULL, |
815 | 0, 0); | |
664059fb | 816 | free(private); |
d2e73c6f SR |
817 | } |
818 | strbuf_release(&buf); | |
0551a06c | 819 | return ret; |
d2e73c6f SR |
820 | } |
821 | ||
30261094 DB |
822 | static void set_common_push_options(struct transport *transport, |
823 | const char *name, int flags) | |
824 | { | |
825 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
826 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
6b5b309f | 827 | die(_("helper %s does not support dry-run"), name); |
30261094 DB |
828 | } else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) { |
829 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0) | |
6b5b309f | 830 | die(_("helper %s does not support --signed"), name); |
30261094 DB |
831 | } else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) { |
832 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0) | |
6b5b309f | 833 | die(_("helper %s does not support --signed=if-asked"), name); |
30261094 | 834 | } |
438fc684 SB |
835 | |
836 | if (flags & TRANSPORT_PUSH_OPTIONS) { | |
837 | struct string_list_item *item; | |
838 | for_each_string_list_item(item, transport->push_options) | |
839 | if (set_helper_option(transport, "push-option", item->string) != 0) | |
6b5b309f | 840 | die(_("helper %s does not support 'push-option'"), name); |
438fc684 | 841 | } |
30261094 DB |
842 | } |
843 | ||
73b49a75 | 844 | static int push_refs_with_push(struct transport *transport, |
05c1eb10 | 845 | struct ref *remote_refs, int flags) |
ae4efe19 SP |
846 | { |
847 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
848 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
849 | struct helper_data *data = transport->data; | |
850 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 | 851 | struct ref *ref; |
05c1eb10 JH |
852 | struct string_list cas_options = STRING_LIST_INIT_DUP; |
853 | struct string_list_item *cas_option; | |
ae4efe19 | 854 | |
c0aa335c | 855 | get_helper(transport); |
ae4efe19 SP |
856 | if (!data->push) |
857 | return 1; | |
858 | ||
859 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 860 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
861 | continue; |
862 | ||
20e8b465 TRC |
863 | /* Check for statuses set by set_ref_status_for_push() */ |
864 | switch (ref->status) { | |
865 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
631b5ef2 | 866 | case REF_STATUS_REJECT_STALE: |
dbfeddb1 | 867 | case REF_STATUS_REJECT_ALREADY_EXISTS: |
20e8b465 | 868 | case REF_STATUS_UPTODATE: |
ae4efe19 | 869 | continue; |
20e8b465 TRC |
870 | default: |
871 | ; /* do nothing */ | |
ae4efe19 SP |
872 | } |
873 | ||
874 | if (force_all) | |
875 | ref->force = 1; | |
876 | ||
877 | strbuf_addstr(&buf, "push "); | |
878 | if (!ref->deletion) { | |
879 | if (ref->force) | |
880 | strbuf_addch(&buf, '+'); | |
881 | if (ref->peer_ref) | |
882 | strbuf_addstr(&buf, ref->peer_ref->name); | |
883 | else | |
f4e54d02 | 884 | strbuf_addstr(&buf, oid_to_hex(&ref->new_oid)); |
ae4efe19 SP |
885 | } |
886 | strbuf_addch(&buf, ':'); | |
887 | strbuf_addstr(&buf, ref->name); | |
888 | strbuf_addch(&buf, '\n'); | |
05c1eb10 JH |
889 | |
890 | /* | |
891 | * The "--force-with-lease" options without explicit | |
892 | * values to expect have already been expanded into | |
f4e54d02 | 893 | * the ref->old_oid_expect[] field; we can ignore |
05c1eb10 JH |
894 | * transport->smart_options->cas altogether and instead |
895 | * can enumerate them from the refs. | |
896 | */ | |
897 | if (ref->expect_old_sha1) { | |
898 | struct strbuf cas = STRBUF_INIT; | |
899 | strbuf_addf(&cas, "%s:%s", | |
f4e54d02 | 900 | ref->name, oid_to_hex(&ref->old_oid_expect)); |
176cb979 RS |
901 | string_list_append_nodup(&cas_options, |
902 | strbuf_detach(&cas, NULL)); | |
05c1eb10 | 903 | } |
ae4efe19 | 904 | } |
05c1eb10 JH |
905 | if (buf.len == 0) { |
906 | string_list_clear(&cas_options, 0); | |
d8f67d20 | 907 | return 0; |
05c1eb10 | 908 | } |
ae4efe19 | 909 | |
05c1eb10 JH |
910 | for_each_string_list_item(cas_option, &cas_options) |
911 | set_helper_option(transport, "cas", cas_option->string); | |
30261094 | 912 | set_common_push_options(transport, data->name, flags); |
ae4efe19 SP |
913 | |
914 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 915 | sendline(data, &buf); |
ae4efe19 | 916 | strbuf_release(&buf); |
176cb979 | 917 | string_list_clear(&cas_options, 0); |
d2e73c6f | 918 | |
0551a06c | 919 | return push_update_refs_status(data, remote_refs, flags); |
ae4efe19 SP |
920 | } |
921 | ||
73b49a75 SR |
922 | static int push_refs_with_export(struct transport *transport, |
923 | struct ref *remote_refs, int flags) | |
924 | { | |
925 | struct ref *ref; | |
926 | struct child_process *helper, exporter; | |
927 | struct helper_data *data = transport->data; | |
d98c8153 | 928 | struct string_list revlist_args = STRING_LIST_INIT_DUP; |
73b49a75 SR |
929 | struct strbuf buf = STRBUF_INIT; |
930 | ||
57f32ac2 | 931 | if (!data->rs.nr) |
6b5b309f | 932 | die(_("remote-helper doesn't support push; refspec needed")); |
21610d82 | 933 | |
30261094 | 934 | set_common_push_options(transport, data->name, flags); |
510fa6f5 FC |
935 | if (flags & TRANSPORT_PUSH_FORCE) { |
936 | if (set_helper_option(transport, "force", "true") != 0) | |
6b5b309f | 937 | warning(_("helper %s does not support 'force'"), data->name); |
510fa6f5 FC |
938 | } |
939 | ||
73b49a75 SR |
940 | helper = get_helper(transport); |
941 | ||
942 | write_constant(helper->in, "export\n"); | |
943 | ||
73b49a75 SR |
944 | for (ref = remote_refs; ref; ref = ref->next) { |
945 | char *private; | |
27912a03 | 946 | struct object_id oid; |
73b49a75 | 947 | |
d000414e | 948 | private = apply_refspecs(&data->rs, ref->name); |
e82caf38 | 949 | if (private && !get_oid(private, &oid)) { |
73b49a75 | 950 | strbuf_addf(&buf, "^%s", private); |
176cb979 RS |
951 | string_list_append_nodup(&revlist_args, |
952 | strbuf_detach(&buf, NULL)); | |
27912a03 | 953 | oidcpy(&ref->old_oid, &oid); |
73b49a75 | 954 | } |
2faa1527 | 955 | free(private); |
73b49a75 | 956 | |
67c9c782 | 957 | if (ref->peer_ref) { |
d98c8153 | 958 | if (strcmp(ref->name, ref->peer_ref->name)) { |
f3d03763 FC |
959 | if (!ref->deletion) { |
960 | const char *name; | |
961 | int flag; | |
962 | ||
963 | /* Follow symbolic refs (mainly for HEAD). */ | |
49e61479 | 964 | name = resolve_ref_unsafe(ref->peer_ref->name, |
965 | RESOLVE_REF_READING, | |
966 | &oid, &flag); | |
f3d03763 FC |
967 | if (!name || !(flag & REF_ISSYMREF)) |
968 | name = ref->peer_ref->name; | |
9193f742 | 969 | |
f3d03763 FC |
970 | strbuf_addf(&buf, "%s:%s", name, ref->name); |
971 | } else | |
972 | strbuf_addf(&buf, ":%s", ref->name); | |
9193f742 | 973 | |
d98c8153 FC |
974 | string_list_append(&revlist_args, "--refspec"); |
975 | string_list_append(&revlist_args, buf.buf); | |
976 | strbuf_release(&buf); | |
977 | } | |
f3d03763 FC |
978 | if (!ref->deletion) |
979 | string_list_append(&revlist_args, ref->peer_ref->name); | |
67c9c782 | 980 | } |
73b49a75 SR |
981 | } |
982 | ||
a515ebe9 | 983 | if (get_exporter(transport, &exporter, &revlist_args)) |
6b5b309f | 984 | die(_("couldn't run fast-export")); |
73b49a75 | 985 | |
d98c8153 FC |
986 | string_list_clear(&revlist_args, 1); |
987 | ||
cc567322 | 988 | if (finish_command(&exporter)) |
6b5b309f | 989 | die(_("error while running fast-export")); |
3994e64d FC |
990 | if (push_update_refs_status(data, remote_refs, flags)) |
991 | return 1; | |
992 | ||
993 | if (data->export_marks) { | |
994 | strbuf_addf(&buf, "%s.tmp", data->export_marks); | |
995 | rename(buf.buf, data->export_marks); | |
996 | strbuf_release(&buf); | |
997 | } | |
998 | ||
999 | return 0; | |
73b49a75 SR |
1000 | } |
1001 | ||
1002 | static int push_refs(struct transport *transport, | |
1003 | struct ref *remote_refs, int flags) | |
1004 | { | |
1005 | struct helper_data *data = transport->data; | |
1006 | ||
1007 | if (process_connect(transport, 1)) { | |
1008 | do_take_over(transport); | |
e967ca38 | 1009 | return transport->vtable->push_refs(transport, remote_refs, flags); |
73b49a75 SR |
1010 | } |
1011 | ||
1012 | if (!remote_refs) { | |
6b5b309f NTND |
1013 | fprintf(stderr, |
1014 | _("No refs in common and none specified; doing nothing.\n" | |
1015 | "Perhaps you should specify a branch such as 'master'.\n")); | |
73b49a75 SR |
1016 | return 0; |
1017 | } | |
1018 | ||
1019 | if (data->push) | |
1020 | return push_refs_with_push(transport, remote_refs, flags); | |
1021 | ||
1022 | if (data->export) | |
1023 | return push_refs_with_export(transport, remote_refs, flags); | |
1024 | ||
1025 | return -1; | |
1026 | } | |
1027 | ||
1028 | ||
f8ec9167 DB |
1029 | static int has_attribute(const char *attrs, const char *attr) { |
1030 | int len; | |
1031 | if (!attrs) | |
1032 | return 0; | |
1033 | ||
1034 | len = strlen(attr); | |
1035 | for (;;) { | |
1036 | const char *space = strchrnul(attrs, ' '); | |
1037 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
1038 | return 1; | |
1039 | if (!*space) | |
1040 | return 0; | |
1041 | attrs = space + 1; | |
1042 | } | |
1043 | } | |
1044 | ||
834cf34b BW |
1045 | static struct ref *get_refs_list(struct transport *transport, int for_push, |
1046 | const struct argv_array *ref_prefixes) | |
6eb996b5 | 1047 | { |
292ce46b | 1048 | struct helper_data *data = transport->data; |
6eb996b5 DB |
1049 | struct child_process *helper; |
1050 | struct ref *ret = NULL; | |
1051 | struct ref **tail = &ret; | |
1052 | struct ref *posn; | |
1053 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
1054 | |
1055 | helper = get_helper(transport); | |
2d14d65c | 1056 | |
fa8c097c IL |
1057 | if (process_connect(transport, for_push)) { |
1058 | do_take_over(transport); | |
834cf34b | 1059 | return transport->vtable->get_refs_list(transport, for_push, ref_prefixes); |
fa8c097c IL |
1060 | } |
1061 | ||
ae4efe19 SP |
1062 | if (data->push && for_push) |
1063 | write_str_in_full(helper->in, "list for-push\n"); | |
1064 | else | |
1065 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 1066 | |
6eb996b5 DB |
1067 | while (1) { |
1068 | char *eov, *eon; | |
5931b33e FC |
1069 | if (recvline(data, &buf)) |
1070 | exit(128); | |
6eb996b5 DB |
1071 | |
1072 | if (!*buf.buf) | |
1073 | break; | |
1074 | ||
1075 | eov = strchr(buf.buf, ' '); | |
1076 | if (!eov) | |
6b5b309f | 1077 | die(_("malformed response in ref list: %s"), buf.buf); |
6eb996b5 DB |
1078 | eon = strchr(eov + 1, ' '); |
1079 | *eov = '\0'; | |
1080 | if (eon) | |
1081 | *eon = '\0'; | |
1082 | *tail = alloc_ref(eov + 1); | |
1083 | if (buf.buf[0] == '@') | |
1084 | (*tail)->symref = xstrdup(buf.buf + 1); | |
1085 | else if (buf.buf[0] != '?') | |
f4e54d02 | 1086 | get_oid_hex(buf.buf, &(*tail)->old_oid); |
f8ec9167 DB |
1087 | if (eon) { |
1088 | if (has_attribute(eon + 1, "unchanged")) { | |
1089 | (*tail)->status |= REF_STATUS_UPTODATE; | |
34c290a6 | 1090 | if (read_ref((*tail)->name, &(*tail)->old_oid) < 0) |
1a07e59c | 1091 | die(_("could not read ref %s"), |
ae25fd39 | 1092 | (*tail)->name); |
f8ec9167 DB |
1093 | } |
1094 | } | |
6eb996b5 DB |
1095 | tail = &((*tail)->next); |
1096 | } | |
bf3c523c IL |
1097 | if (debug) |
1098 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
1099 | strbuf_release(&buf); |
1100 | ||
1101 | for (posn = ret; posn; posn = posn->next) | |
1102 | resolve_remote_symref(posn, ret); | |
1103 | ||
1104 | return ret; | |
1105 | } | |
1106 | ||
e967ca38 | 1107 | static struct transport_vtable vtable = { |
6ab40557 | 1108 | 0, |
e967ca38 JT |
1109 | set_helper_option, |
1110 | get_refs_list, | |
1111 | fetch, | |
1112 | push_refs, | |
1113 | connect_helper, | |
1114 | release_helper | |
1115 | }; | |
1116 | ||
c9e388bb | 1117 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 | 1118 | { |
92e25b6b | 1119 | struct helper_data *data = xcalloc(1, sizeof(*data)); |
c9e388bb | 1120 | data->name = name; |
6eb996b5 | 1121 | |
a5adaced JK |
1122 | transport_check_allowed(name); |
1123 | ||
bf3c523c IL |
1124 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
1125 | debug = 1; | |
1126 | ||
6eb996b5 | 1127 | transport->data = data; |
e967ca38 | 1128 | transport->vtable = &vtable; |
61b075bd | 1129 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
1130 | return 0; |
1131 | } | |
419f37db IL |
1132 | |
1133 | /* | |
1134 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
1135 | * buffer less), so attempt reads and writes with up to that size. | |
1136 | */ | |
1137 | #define BUFFERSIZE 65536 | |
1138 | /* This should be enough to hold debugging message. */ | |
1139 | #define PBUFFERSIZE 8192 | |
1140 | ||
1141 | /* Print bidirectional transfer loop debug message. */ | |
4621085b | 1142 | __attribute__((format (printf, 1, 2))) |
419f37db IL |
1143 | static void transfer_debug(const char *fmt, ...) |
1144 | { | |
6cdf8a79 MÅ |
1145 | /* |
1146 | * NEEDSWORK: This function is sometimes used from multiple threads, and | |
1147 | * we end up using debug_enabled racily. That "should not matter" since | |
1148 | * we always write the same value, but it's still wrong. This function | |
1149 | * is listed in .tsan-suppressions for the time being. | |
1150 | */ | |
1151 | ||
419f37db IL |
1152 | va_list args; |
1153 | char msgbuf[PBUFFERSIZE]; | |
1154 | static int debug_enabled = -1; | |
1155 | ||
1156 | if (debug_enabled < 0) | |
1157 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
1158 | if (!debug_enabled) | |
1159 | return; | |
1160 | ||
1161 | va_start(args, fmt); | |
1162 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
1163 | va_end(args); | |
1164 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
1165 | } | |
1166 | ||
1167 | /* Stream state: More data may be coming in this direction. */ | |
2e3a16b2 | 1168 | #define SSTATE_TRANSFERRING 0 |
419f37db IL |
1169 | /* |
1170 | * Stream state: No more data coming in this direction, flushing rest of | |
1171 | * data. | |
1172 | */ | |
1173 | #define SSTATE_FLUSHING 1 | |
1174 | /* Stream state: Transfer in this direction finished. */ | |
1175 | #define SSTATE_FINISHED 2 | |
1176 | ||
2e3a16b2 | 1177 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING) |
419f37db IL |
1178 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) |
1179 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
1180 | ||
1181 | /* Unidirectional transfer. */ | |
1182 | struct unidirectional_transfer { | |
1183 | /* Source */ | |
1184 | int src; | |
1185 | /* Destination */ | |
1186 | int dest; | |
1187 | /* Is source socket? */ | |
1188 | int src_is_sock; | |
1189 | /* Is destination socket? */ | |
1190 | int dest_is_sock; | |
41ccfdd9 | 1191 | /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */ |
419f37db IL |
1192 | int state; |
1193 | /* Buffer. */ | |
1194 | char buf[BUFFERSIZE]; | |
1195 | /* Buffer used. */ | |
1196 | size_t bufuse; | |
1197 | /* Name of source. */ | |
1198 | const char *src_name; | |
1199 | /* Name of destination. */ | |
1200 | const char *dest_name; | |
1201 | }; | |
1202 | ||
1203 | /* Closes the target (for writing) if transfer has finished. */ | |
1204 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
1205 | { | |
1206 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
1207 | t->state = SSTATE_FINISHED; | |
1208 | if (t->dest_is_sock) | |
1209 | shutdown(t->dest, SHUT_WR); | |
1210 | else | |
1211 | close(t->dest); | |
1212 | transfer_debug("Closed %s.", t->dest_name); | |
1213 | } | |
1214 | } | |
1215 | ||
1216 | /* | |
832c0e5e | 1217 | * Tries to read data from source into buffer. If buffer is full, |
419f37db IL |
1218 | * no data is read. Returns 0 on success, -1 on error. |
1219 | */ | |
1220 | static int udt_do_read(struct unidirectional_transfer *t) | |
1221 | { | |
1222 | ssize_t bytes; | |
1223 | ||
1224 | if (t->bufuse == BUFFERSIZE) | |
1225 | return 0; /* No space for more. */ | |
1226 | ||
1227 | transfer_debug("%s is readable", t->src_name); | |
1228 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
1229 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1230 | errno != EINTR) { | |
6b5b309f | 1231 | error_errno(_("read(%s) failed"), t->src_name); |
419f37db IL |
1232 | return -1; |
1233 | } else if (bytes == 0) { | |
1234 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
4621085b | 1235 | t->src_name, (int)t->bufuse); |
419f37db IL |
1236 | t->state = SSTATE_FLUSHING; |
1237 | } else if (bytes > 0) { | |
1238 | t->bufuse += bytes; | |
1239 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
1240 | (int)bytes, t->src_name, (int)t->bufuse); | |
1241 | } | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | /* Tries to write data from buffer into destination. If buffer is empty, | |
1246 | * no data is written. Returns 0 on success, -1 on error. | |
1247 | */ | |
1248 | static int udt_do_write(struct unidirectional_transfer *t) | |
1249 | { | |
803dbdb9 | 1250 | ssize_t bytes; |
419f37db IL |
1251 | |
1252 | if (t->bufuse == 0) | |
1253 | return 0; /* Nothing to write. */ | |
1254 | ||
1255 | transfer_debug("%s is writable", t->dest_name); | |
7edc02f4 EFL |
1256 | bytes = xwrite(t->dest, t->buf, t->bufuse); |
1257 | if (bytes < 0 && errno != EWOULDBLOCK) { | |
6b5b309f | 1258 | error_errno(_("write(%s) failed"), t->dest_name); |
419f37db IL |
1259 | return -1; |
1260 | } else if (bytes > 0) { | |
1261 | t->bufuse -= bytes; | |
1262 | if (t->bufuse) | |
1263 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1264 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1265 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1266 | } | |
1267 | return 0; | |
1268 | } | |
1269 | ||
1270 | ||
1271 | /* State of bidirectional transfer loop. */ | |
1272 | struct bidirectional_transfer_state { | |
1273 | /* Direction from program to git. */ | |
1274 | struct unidirectional_transfer ptg; | |
1275 | /* Direction from git to program. */ | |
1276 | struct unidirectional_transfer gtp; | |
1277 | }; | |
1278 | ||
1279 | static void *udt_copy_task_routine(void *udt) | |
1280 | { | |
1281 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1282 | while (t->state != SSTATE_FINISHED) { | |
1283 | if (STATE_NEEDS_READING(t->state)) | |
1284 | if (udt_do_read(t)) | |
1285 | return NULL; | |
1286 | if (STATE_NEEDS_WRITING(t->state)) | |
1287 | if (udt_do_write(t)) | |
1288 | return NULL; | |
1289 | if (STATE_NEEDS_CLOSING(t->state)) | |
1290 | udt_close_if_finished(t); | |
1291 | } | |
1292 | return udt; /* Just some non-NULL value. */ | |
1293 | } | |
1294 | ||
1295 | #ifndef NO_PTHREADS | |
1296 | ||
1297 | /* | |
98e023de | 1298 | * Join thread, with appropriate errors on failure. Name is name for the |
419f37db IL |
1299 | * thread (for error messages). Returns 0 on success, 1 on failure. |
1300 | */ | |
1301 | static int tloop_join(pthread_t thread, const char *name) | |
1302 | { | |
1303 | int err; | |
1304 | void *tret; | |
1305 | err = pthread_join(thread, &tret); | |
1306 | if (!tret) { | |
6b5b309f | 1307 | error(_("%s thread failed"), name); |
419f37db IL |
1308 | return 1; |
1309 | } | |
1310 | if (err) { | |
6b5b309f | 1311 | error(_("%s thread failed to join: %s"), name, strerror(err)); |
419f37db IL |
1312 | return 1; |
1313 | } | |
1314 | return 0; | |
1315 | } | |
1316 | ||
1317 | /* | |
1318 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1319 | * -1 on failure. | |
1320 | */ | |
1321 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1322 | { | |
1323 | pthread_t gtp_thread; | |
1324 | pthread_t ptg_thread; | |
1325 | int err; | |
1326 | int ret = 0; | |
1327 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1328 | &s->gtp); | |
1329 | if (err) | |
6b5b309f | 1330 | die(_("can't start thread for copying data: %s"), strerror(err)); |
419f37db IL |
1331 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, |
1332 | &s->ptg); | |
1333 | if (err) | |
6b5b309f | 1334 | die(_("can't start thread for copying data: %s"), strerror(err)); |
419f37db IL |
1335 | |
1336 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1337 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1338 | return ret; | |
1339 | } | |
1340 | #else | |
1341 | ||
1342 | /* Close the source and target (for writing) for transfer. */ | |
1343 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1344 | { | |
1345 | t->state = SSTATE_FINISHED; | |
1346 | /* | |
1347 | * Socket read end left open isn't a disaster if nobody | |
1348 | * attempts to read from it (mingw compat headers do not | |
1349 | * have SHUT_RD)... | |
1350 | * | |
1351 | * We can't fully close the socket since otherwise gtp | |
1352 | * task would first close the socket it sends data to | |
1353 | * while closing the ptg file descriptors. | |
1354 | */ | |
1355 | if (!t->src_is_sock) | |
1356 | close(t->src); | |
1357 | if (t->dest_is_sock) | |
1358 | shutdown(t->dest, SHUT_WR); | |
1359 | else | |
1360 | close(t->dest); | |
1361 | } | |
1362 | ||
1363 | /* | |
98e023de | 1364 | * Join process, with appropriate errors on failure. Name is name for the |
419f37db IL |
1365 | * process (for error messages). Returns 0 on success, 1 on failure. |
1366 | */ | |
1367 | static int tloop_join(pid_t pid, const char *name) | |
1368 | { | |
1369 | int tret; | |
1370 | if (waitpid(pid, &tret, 0) < 0) { | |
6b5b309f | 1371 | error_errno(_("%s process failed to wait"), name); |
419f37db IL |
1372 | return 1; |
1373 | } | |
1374 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
6b5b309f | 1375 | error(_("%s process failed"), name); |
419f37db IL |
1376 | return 1; |
1377 | } | |
1378 | return 0; | |
1379 | } | |
1380 | ||
1381 | /* | |
1382 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1383 | * -1 on failure. | |
1384 | */ | |
1385 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1386 | { | |
1387 | pid_t pid1, pid2; | |
1388 | int ret = 0; | |
1389 | ||
1390 | /* Fork thread #1: git to program. */ | |
1391 | pid1 = fork(); | |
1392 | if (pid1 < 0) | |
6b5b309f | 1393 | die_errno(_("can't start thread for copying data")); |
419f37db IL |
1394 | else if (pid1 == 0) { |
1395 | udt_kill_transfer(&s->ptg); | |
1396 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1397 | } | |
1398 | ||
1399 | /* Fork thread #2: program to git. */ | |
1400 | pid2 = fork(); | |
1401 | if (pid2 < 0) | |
6b5b309f | 1402 | die_errno(_("can't start thread for copying data")); |
419f37db IL |
1403 | else if (pid2 == 0) { |
1404 | udt_kill_transfer(&s->gtp); | |
1405 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1406 | } | |
1407 | ||
1408 | /* | |
1409 | * Close both streams in parent as to not interfere with | |
1410 | * end of file detection and wait for both tasks to finish. | |
1411 | */ | |
1412 | udt_kill_transfer(&s->gtp); | |
1413 | udt_kill_transfer(&s->ptg); | |
1414 | ret |= tloop_join(pid1, "Git to program copy"); | |
1415 | ret |= tloop_join(pid2, "Program to git copy"); | |
1416 | return ret; | |
1417 | } | |
1418 | #endif | |
1419 | ||
1420 | /* | |
1421 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1422 | * Additionally filtering through given filter. If filter is NULL, uses | |
1423 | * identity filter. | |
1424 | */ | |
1425 | int bidirectional_transfer_loop(int input, int output) | |
1426 | { | |
1427 | struct bidirectional_transfer_state state; | |
1428 | ||
1429 | /* Fill the state fields. */ | |
1430 | state.ptg.src = input; | |
1431 | state.ptg.dest = 1; | |
1432 | state.ptg.src_is_sock = (input == output); | |
1433 | state.ptg.dest_is_sock = 0; | |
2e3a16b2 | 1434 | state.ptg.state = SSTATE_TRANSFERRING; |
419f37db IL |
1435 | state.ptg.bufuse = 0; |
1436 | state.ptg.src_name = "remote input"; | |
1437 | state.ptg.dest_name = "stdout"; | |
1438 | ||
1439 | state.gtp.src = 0; | |
1440 | state.gtp.dest = output; | |
1441 | state.gtp.src_is_sock = 0; | |
1442 | state.gtp.dest_is_sock = (input == output); | |
2e3a16b2 | 1443 | state.gtp.state = SSTATE_TRANSFERRING; |
419f37db IL |
1444 | state.gtp.bufuse = 0; |
1445 | state.gtp.src_name = "stdin"; | |
1446 | state.gtp.dest_name = "remote output"; | |
1447 | ||
1448 | return tloop_spawnwait_tasks(&state); | |
1449 | } |