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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) |
bf3c523c IL |
51 | die_errno("Full write to remote helper failed"); |
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) |
bf3c523c IL |
80 | die_errno("Full write to remote helper failed"); |
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) | |
132 | die("Unable to find remote helper for '%s'", data->name); | |
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) | |
148 | die_errno("Can't dup helper output fd"); | |
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) { |
9517e6b8 | 199 | die("Unknown mandatory capability %s. This remote " |
82247e9b | 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)) { |
a93b4a09 | 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 { | |
272 | warning("%s unexpectedly said: '%s'", data->name, buf->buf); | |
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) | |
401 | warning("%s also locked %s", data->name, name); | |
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 | |
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 | 425 | argv_array_push(&fastimport->args, "fast-import"); |
68061e34 | 426 | argv_array_push(&fastimport->args, "--allow-unsafe-features"); |
173fd1a1 | 427 | argv_array_push(&fastimport->args, debug ? "--stats" : "--quiet"); |
e65e91ed | 428 | |
bfc366d9 FA |
429 | if (data->bidi_import) { |
430 | cat_blob_fd = xdup(helper->in); | |
173fd1a1 | 431 | argv_array_pushf(&fastimport->args, "--cat-blob-fd=%d", cat_blob_fd); |
bfc366d9 | 432 | } |
e65e91ed | 433 | fastimport->git_cmd = 1; |
bfc366d9 FA |
434 | |
435 | code = start_command(fastimport); | |
436 | return code; | |
e65e91ed DB |
437 | } |
438 | ||
73b49a75 SR |
439 | static int get_exporter(struct transport *transport, |
440 | struct child_process *fastexport, | |
73b49a75 SR |
441 | struct string_list *revlist_args) |
442 | { | |
a515ebe9 | 443 | struct helper_data *data = transport->data; |
73b49a75 | 444 | struct child_process *helper = get_helper(transport); |
2aeae40a | 445 | int i; |
852e54bc | 446 | |
8828f298 | 447 | child_process_init(fastexport); |
73b49a75 SR |
448 | |
449 | /* we need to duplicate helper->in because we want to use it after | |
450 | * fastexport is done with it. */ | |
451 | fastexport->out = dup(helper->in); | |
2aeae40a JK |
452 | argv_array_push(&fastexport->args, "fast-export"); |
453 | argv_array_push(&fastexport->args, "--use-done-feature"); | |
454 | argv_array_push(&fastexport->args, data->signed_tags ? | |
455 | "--signed-tags=verbatim" : "--signed-tags=warn-strip"); | |
456 | if (data->export_marks) | |
457 | argv_array_pushf(&fastexport->args, "--export-marks=%s.tmp", data->export_marks); | |
458 | if (data->import_marks) | |
459 | argv_array_pushf(&fastexport->args, "--import-marks=%s", data->import_marks); | |
73b49a75 SR |
460 | |
461 | for (i = 0; i < revlist_args->nr; i++) | |
2aeae40a | 462 | argv_array_push(&fastexport->args, revlist_args->items[i].string); |
73b49a75 SR |
463 | |
464 | fastexport->git_cmd = 1; | |
465 | return start_command(fastexport); | |
466 | } | |
467 | ||
e65e91ed DB |
468 | static int fetch_with_import(struct transport *transport, |
469 | int nr_heads, struct ref **to_fetch) | |
470 | { | |
471 | struct child_process fastimport; | |
72ff8943 | 472 | struct helper_data *data = transport->data; |
e65e91ed DB |
473 | int i; |
474 | struct ref *posn; | |
475 | struct strbuf buf = STRBUF_INIT; | |
476 | ||
bf3c523c IL |
477 | get_helper(transport); |
478 | ||
e65e91ed DB |
479 | if (get_importer(transport, &fastimport)) |
480 | die("Couldn't run fast-import"); | |
481 | ||
482 | for (i = 0; i < nr_heads; i++) { | |
483 | posn = to_fetch[i]; | |
484 | if (posn->status & REF_STATUS_UPTODATE) | |
485 | continue; | |
486 | ||
33cae542 MH |
487 | strbuf_addf(&buf, "import %s\n", |
488 | posn->symref ? posn->symref : posn->name); | |
bf3c523c | 489 | sendline(data, &buf); |
e65e91ed DB |
490 | strbuf_reset(&buf); |
491 | } | |
9504bc9d SR |
492 | |
493 | write_constant(data->helper->in, "\n"); | |
bfc366d9 FA |
494 | /* |
495 | * remote-helpers that advertise the bidi-import capability are required to | |
496 | * buffer the complete batch of import commands until this newline before | |
497 | * sending data to fast-import. | |
498 | * These helpers read back data from fast-import on their stdin, which could | |
499 | * be mixed with import commands, otherwise. | |
500 | */ | |
9504bc9d | 501 | |
cc567322 SR |
502 | if (finish_command(&fastimport)) |
503 | die("Error while running fast-import"); | |
e65e91ed | 504 | |
dff9d65d FA |
505 | /* |
506 | * The fast-import stream of a remote helper that advertises | |
507 | * the "refspec" capability writes to the refs named after the | |
508 | * right hand side of the first refspec matching each ref we | |
509 | * were fetching. | |
510 | * | |
511 | * (If no "refspec" capability was specified, for historical | |
7a43c554 | 512 | * reasons we default to the equivalent of *:*.) |
dff9d65d FA |
513 | * |
514 | * Store the result in to_fetch[i].old_sha1. Callers such | |
515 | * as "git fetch" can use the value to write feedback to the | |
516 | * terminal, populate FETCH_HEAD, and determine what new value | |
517 | * should be written to peer_ref if the update is a | |
518 | * fast-forward or this is a forced update. | |
519 | */ | |
e65e91ed | 520 | for (i = 0; i < nr_heads; i++) { |
33cae542 | 521 | char *private, *name; |
e65e91ed DB |
522 | posn = to_fetch[i]; |
523 | if (posn->status & REF_STATUS_UPTODATE) | |
524 | continue; | |
33cae542 | 525 | name = posn->symref ? posn->symref : posn->name; |
57f32ac2 | 526 | if (data->rs.nr) |
d000414e | 527 | private = apply_refspecs(&data->rs, name); |
72ff8943 | 528 | else |
33cae542 | 529 | private = xstrdup(name); |
d51b720f | 530 | if (private) { |
34c290a6 | 531 | if (read_ref(private, &posn->old_oid) < 0) |
ae25fd39 | 532 | die("Could not read ref %s", private); |
d51b720f MH |
533 | free(private); |
534 | } | |
e65e91ed | 535 | } |
b962dbdc | 536 | strbuf_release(&buf); |
e65e91ed DB |
537 | return 0; |
538 | } | |
539 | ||
176e85c1 | 540 | static int run_connect(struct transport *transport, struct strbuf *cmdbuf) |
fa8c097c IL |
541 | { |
542 | struct helper_data *data = transport->data; | |
176e85c1 BW |
543 | int ret = 0; |
544 | int duped; | |
fa8c097c | 545 | FILE *input; |
176e85c1 | 546 | struct child_process *helper; |
fa8c097c IL |
547 | |
548 | helper = get_helper(transport); | |
549 | ||
550 | /* | |
551 | * Yes, dup the pipe another time, as we need unbuffered version | |
552 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
553 | * stream buffering only can be changed before first I/O operation | |
554 | * on it. | |
555 | */ | |
556 | duped = dup(helper->out); | |
557 | if (duped < 0) | |
558 | die_errno("Can't dup helper output fd"); | |
559 | input = xfdopen(duped, "r"); | |
560 | setvbuf(input, NULL, _IONBF, 0); | |
561 | ||
176e85c1 BW |
562 | sendline(data, cmdbuf); |
563 | if (recvline_fh(input, cmdbuf)) | |
564 | exit(128); | |
565 | ||
566 | if (!strcmp(cmdbuf->buf, "")) { | |
567 | data->no_disconnect_req = 1; | |
568 | if (debug) | |
569 | fprintf(stderr, "Debug: Smart transport connection " | |
570 | "ready.\n"); | |
571 | ret = 1; | |
572 | } else if (!strcmp(cmdbuf->buf, "fallback")) { | |
573 | if (debug) | |
574 | fprintf(stderr, "Debug: Falling back to dumb " | |
575 | "transport.\n"); | |
576 | } else { | |
577 | die("Unknown response to connect: %s", | |
578 | cmdbuf->buf); | |
579 | } | |
580 | ||
581 | fclose(input); | |
582 | return ret; | |
583 | } | |
584 | ||
585 | static int process_connect_service(struct transport *transport, | |
586 | const char *name, const char *exec) | |
587 | { | |
588 | struct helper_data *data = transport->data; | |
589 | struct strbuf cmdbuf = STRBUF_INIT; | |
590 | int ret = 0; | |
591 | ||
fa8c097c IL |
592 | /* |
593 | * Handle --upload-pack and friends. This is fire and forget... | |
594 | * just warn if it fails. | |
595 | */ | |
596 | if (strcmp(name, exec)) { | |
176e85c1 | 597 | int r = set_helper_option(transport, "servpath", exec); |
fa8c097c IL |
598 | if (r > 0) |
599 | warning("Setting remote service path not supported by protocol."); | |
600 | else if (r < 0) | |
601 | warning("Invalid remote service path."); | |
602 | } | |
603 | ||
176e85c1 | 604 | if (data->connect) { |
fa8c097c | 605 | strbuf_addf(&cmdbuf, "connect %s\n", name); |
176e85c1 | 606 | ret = run_connect(transport, &cmdbuf); |
edc9caf7 BW |
607 | } else if (data->stateless_connect && |
608 | (get_protocol_version_config() == protocol_v2) && | |
609 | !strcmp("git-upload-pack", name)) { | |
610 | strbuf_addf(&cmdbuf, "stateless-connect %s\n", name); | |
611 | ret = run_connect(transport, &cmdbuf); | |
612 | if (ret) | |
613 | transport->stateless_rpc = 1; | |
176e85c1 | 614 | } |
fa8c097c | 615 | |
4168be8e | 616 | strbuf_release(&cmdbuf); |
fa8c097c IL |
617 | return ret; |
618 | } | |
619 | ||
620 | static int process_connect(struct transport *transport, | |
621 | int for_push) | |
622 | { | |
623 | struct helper_data *data = transport->data; | |
624 | const char *name; | |
625 | const char *exec; | |
626 | ||
627 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
628 | if (for_push) | |
629 | exec = data->transport_options.receivepack; | |
630 | else | |
631 | exec = data->transport_options.uploadpack; | |
632 | ||
633 | return process_connect_service(transport, name, exec); | |
634 | } | |
635 | ||
b236752a IL |
636 | static int connect_helper(struct transport *transport, const char *name, |
637 | const char *exec, int fd[2]) | |
638 | { | |
639 | struct helper_data *data = transport->data; | |
640 | ||
641 | /* Get_helper so connect is inited. */ | |
642 | get_helper(transport); | |
643 | if (!data->connect) | |
644 | die("Operation not supported by protocol."); | |
645 | ||
646 | if (!process_connect_service(transport, name, exec)) | |
647 | die("Can't connect to subservice %s.", name); | |
648 | ||
649 | fd[0] = data->helper->out; | |
650 | fd[1] = data->helper->in; | |
651 | return 0; | |
652 | } | |
653 | ||
6eb996b5 | 654 | static int fetch(struct transport *transport, |
37148311 | 655 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
656 | { |
657 | struct helper_data *data = transport->data; | |
658 | int i, count; | |
659 | ||
fa8c097c IL |
660 | if (process_connect(transport, 0)) { |
661 | do_take_over(transport); | |
e967ca38 | 662 | return transport->vtable->fetch(transport, nr_heads, to_fetch); |
fa8c097c IL |
663 | } |
664 | ||
6eb996b5 DB |
665 | count = 0; |
666 | for (i = 0; i < nr_heads; i++) | |
667 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
668 | count++; | |
669 | ||
670 | if (!count) | |
671 | return 0; | |
672 | ||
aab1beb0 MH |
673 | if (data->check_connectivity && |
674 | data->transport_options.check_self_contained_and_connected) | |
675 | set_helper_option(transport, "check-connectivity", "true"); | |
676 | ||
677 | if (transport->cloning) | |
678 | set_helper_option(transport, "cloning", "true"); | |
679 | ||
680 | if (data->transport_options.update_shallow) | |
681 | set_helper_option(transport, "update-shallow", "true"); | |
682 | ||
640d8b72 JH |
683 | if (data->transport_options.filter_options.choice) |
684 | set_helper_option( | |
685 | transport, "filter", | |
686 | data->transport_options.filter_options.filter_spec); | |
687 | ||
6eb996b5 DB |
688 | if (data->fetch) |
689 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
690 | ||
e65e91ed DB |
691 | if (data->import) |
692 | return fetch_with_import(transport, nr_heads, to_fetch); | |
693 | ||
6eb996b5 DB |
694 | return -1; |
695 | } | |
696 | ||
664059fb | 697 | static int push_update_ref_status(struct strbuf *buf, |
d2e73c6f SR |
698 | struct ref **ref, |
699 | struct ref *remote_refs) | |
700 | { | |
701 | char *refname, *msg; | |
f9e3c6be | 702 | int status, forced = 0; |
d2e73c6f | 703 | |
59556548 | 704 | if (starts_with(buf->buf, "ok ")) { |
d2e73c6f SR |
705 | status = REF_STATUS_OK; |
706 | refname = buf->buf + 3; | |
59556548 | 707 | } else if (starts_with(buf->buf, "error ")) { |
d2e73c6f SR |
708 | status = REF_STATUS_REMOTE_REJECT; |
709 | refname = buf->buf + 6; | |
710 | } else | |
82247e9b | 711 | die("expected ok/error, helper said '%s'", buf->buf); |
d2e73c6f SR |
712 | |
713 | msg = strchr(refname, ' '); | |
714 | if (msg) { | |
715 | struct strbuf msg_buf = STRBUF_INIT; | |
716 | const char *end; | |
717 | ||
718 | *msg++ = '\0'; | |
719 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
720 | msg = strbuf_detach(&msg_buf, NULL); | |
721 | else | |
722 | msg = xstrdup(msg); | |
723 | strbuf_release(&msg_buf); | |
724 | ||
725 | if (!strcmp(msg, "no match")) { | |
726 | status = REF_STATUS_NONE; | |
6a83d902 | 727 | FREE_AND_NULL(msg); |
d2e73c6f SR |
728 | } |
729 | else if (!strcmp(msg, "up to date")) { | |
730 | status = REF_STATUS_UPTODATE; | |
6a83d902 | 731 | FREE_AND_NULL(msg); |
d2e73c6f SR |
732 | } |
733 | else if (!strcmp(msg, "non-fast forward")) { | |
734 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
6a83d902 | 735 | FREE_AND_NULL(msg); |
d2e73c6f | 736 | } |
dbfeddb1 CR |
737 | else if (!strcmp(msg, "already exists")) { |
738 | status = REF_STATUS_REJECT_ALREADY_EXISTS; | |
6a83d902 | 739 | FREE_AND_NULL(msg); |
dbfeddb1 | 740 | } |
75e5c0dc JH |
741 | else if (!strcmp(msg, "fetch first")) { |
742 | status = REF_STATUS_REJECT_FETCH_FIRST; | |
6a83d902 | 743 | FREE_AND_NULL(msg); |
75e5c0dc JH |
744 | } |
745 | else if (!strcmp(msg, "needs force")) { | |
746 | status = REF_STATUS_REJECT_NEEDS_FORCE; | |
6a83d902 | 747 | FREE_AND_NULL(msg); |
75e5c0dc | 748 | } |
631b5ef2 JH |
749 | else if (!strcmp(msg, "stale info")) { |
750 | status = REF_STATUS_REJECT_STALE; | |
6a83d902 | 751 | FREE_AND_NULL(msg); |
631b5ef2 | 752 | } |
f9e3c6be FC |
753 | else if (!strcmp(msg, "forced update")) { |
754 | forced = 1; | |
6a83d902 | 755 | FREE_AND_NULL(msg); |
f9e3c6be | 756 | } |
d2e73c6f SR |
757 | } |
758 | ||
759 | if (*ref) | |
760 | *ref = find_ref_by_name(*ref, refname); | |
761 | if (!*ref) | |
762 | *ref = find_ref_by_name(remote_refs, refname); | |
763 | if (!*ref) { | |
764 | warning("helper reported unexpected status of %s", refname); | |
664059fb | 765 | return 1; |
d2e73c6f SR |
766 | } |
767 | ||
768 | if ((*ref)->status != REF_STATUS_NONE) { | |
769 | /* | |
770 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
771 | * status reported by the remote helper if the latter is 'no match'. | |
772 | */ | |
773 | if (status == REF_STATUS_NONE) | |
664059fb | 774 | return 1; |
d2e73c6f SR |
775 | } |
776 | ||
777 | (*ref)->status = status; | |
cf31f70c | 778 | (*ref)->forced_update |= forced; |
d2e73c6f | 779 | (*ref)->remote_status = msg; |
126aac5c | 780 | return !(status == REF_STATUS_OK); |
d2e73c6f SR |
781 | } |
782 | ||
0551a06c | 783 | static int push_update_refs_status(struct helper_data *data, |
5a75353f FC |
784 | struct ref *remote_refs, |
785 | int flags) | |
d2e73c6f SR |
786 | { |
787 | struct strbuf buf = STRBUF_INIT; | |
788 | struct ref *ref = remote_refs; | |
0551a06c FC |
789 | int ret = 0; |
790 | ||
d2e73c6f | 791 | for (;;) { |
664059fb FC |
792 | char *private; |
793 | ||
0551a06c FC |
794 | if (recvline(data, &buf)) { |
795 | ret = 1; | |
796 | break; | |
797 | } | |
798 | ||
d2e73c6f SR |
799 | if (!buf.len) |
800 | break; | |
801 | ||
664059fb FC |
802 | if (push_update_ref_status(&buf, &ref, remote_refs)) |
803 | continue; | |
804 | ||
57f32ac2 | 805 | if (flags & TRANSPORT_PUSH_DRY_RUN || !data->rs.nr || data->no_private_update) |
664059fb FC |
806 | continue; |
807 | ||
808 | /* propagate back the update to the remote namespace */ | |
d000414e | 809 | private = apply_refspecs(&data->rs, ref->name); |
664059fb FC |
810 | if (!private) |
811 | continue; | |
ae077771 | 812 | update_ref("update by helper", private, &ref->new_oid, NULL, |
813 | 0, 0); | |
664059fb | 814 | free(private); |
d2e73c6f SR |
815 | } |
816 | strbuf_release(&buf); | |
0551a06c | 817 | return ret; |
d2e73c6f SR |
818 | } |
819 | ||
30261094 DB |
820 | static void set_common_push_options(struct transport *transport, |
821 | const char *name, int flags) | |
822 | { | |
823 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
824 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
825 | die("helper %s does not support dry-run", name); | |
826 | } else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) { | |
827 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0) | |
828 | die("helper %s does not support --signed", name); | |
829 | } else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) { | |
830 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0) | |
831 | die("helper %s does not support --signed=if-asked", name); | |
832 | } | |
438fc684 SB |
833 | |
834 | if (flags & TRANSPORT_PUSH_OPTIONS) { | |
835 | struct string_list_item *item; | |
836 | for_each_string_list_item(item, transport->push_options) | |
837 | if (set_helper_option(transport, "push-option", item->string) != 0) | |
838 | die("helper %s does not support 'push-option'", name); | |
839 | } | |
30261094 DB |
840 | } |
841 | ||
73b49a75 | 842 | static int push_refs_with_push(struct transport *transport, |
05c1eb10 | 843 | struct ref *remote_refs, int flags) |
ae4efe19 SP |
844 | { |
845 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
846 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
847 | struct helper_data *data = transport->data; | |
848 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 | 849 | struct ref *ref; |
05c1eb10 JH |
850 | struct string_list cas_options = STRING_LIST_INIT_DUP; |
851 | struct string_list_item *cas_option; | |
ae4efe19 | 852 | |
c0aa335c | 853 | get_helper(transport); |
ae4efe19 SP |
854 | if (!data->push) |
855 | return 1; | |
856 | ||
857 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 858 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
859 | continue; |
860 | ||
20e8b465 TRC |
861 | /* Check for statuses set by set_ref_status_for_push() */ |
862 | switch (ref->status) { | |
863 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
631b5ef2 | 864 | case REF_STATUS_REJECT_STALE: |
dbfeddb1 | 865 | case REF_STATUS_REJECT_ALREADY_EXISTS: |
20e8b465 | 866 | case REF_STATUS_UPTODATE: |
ae4efe19 | 867 | continue; |
20e8b465 TRC |
868 | default: |
869 | ; /* do nothing */ | |
ae4efe19 SP |
870 | } |
871 | ||
872 | if (force_all) | |
873 | ref->force = 1; | |
874 | ||
875 | strbuf_addstr(&buf, "push "); | |
876 | if (!ref->deletion) { | |
877 | if (ref->force) | |
878 | strbuf_addch(&buf, '+'); | |
879 | if (ref->peer_ref) | |
880 | strbuf_addstr(&buf, ref->peer_ref->name); | |
881 | else | |
f4e54d02 | 882 | strbuf_addstr(&buf, oid_to_hex(&ref->new_oid)); |
ae4efe19 SP |
883 | } |
884 | strbuf_addch(&buf, ':'); | |
885 | strbuf_addstr(&buf, ref->name); | |
886 | strbuf_addch(&buf, '\n'); | |
05c1eb10 JH |
887 | |
888 | /* | |
889 | * The "--force-with-lease" options without explicit | |
890 | * values to expect have already been expanded into | |
f4e54d02 | 891 | * the ref->old_oid_expect[] field; we can ignore |
05c1eb10 JH |
892 | * transport->smart_options->cas altogether and instead |
893 | * can enumerate them from the refs. | |
894 | */ | |
895 | if (ref->expect_old_sha1) { | |
896 | struct strbuf cas = STRBUF_INIT; | |
897 | strbuf_addf(&cas, "%s:%s", | |
f4e54d02 | 898 | ref->name, oid_to_hex(&ref->old_oid_expect)); |
176cb979 RS |
899 | string_list_append_nodup(&cas_options, |
900 | strbuf_detach(&cas, NULL)); | |
05c1eb10 | 901 | } |
ae4efe19 | 902 | } |
05c1eb10 JH |
903 | if (buf.len == 0) { |
904 | string_list_clear(&cas_options, 0); | |
d8f67d20 | 905 | return 0; |
05c1eb10 | 906 | } |
ae4efe19 | 907 | |
05c1eb10 JH |
908 | for_each_string_list_item(cas_option, &cas_options) |
909 | set_helper_option(transport, "cas", cas_option->string); | |
30261094 | 910 | set_common_push_options(transport, data->name, flags); |
ae4efe19 SP |
911 | |
912 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 913 | sendline(data, &buf); |
ae4efe19 | 914 | strbuf_release(&buf); |
176cb979 | 915 | string_list_clear(&cas_options, 0); |
d2e73c6f | 916 | |
0551a06c | 917 | return push_update_refs_status(data, remote_refs, flags); |
ae4efe19 SP |
918 | } |
919 | ||
73b49a75 SR |
920 | static int push_refs_with_export(struct transport *transport, |
921 | struct ref *remote_refs, int flags) | |
922 | { | |
923 | struct ref *ref; | |
924 | struct child_process *helper, exporter; | |
925 | struct helper_data *data = transport->data; | |
d98c8153 | 926 | struct string_list revlist_args = STRING_LIST_INIT_DUP; |
73b49a75 SR |
927 | struct strbuf buf = STRBUF_INIT; |
928 | ||
57f32ac2 | 929 | if (!data->rs.nr) |
21610d82 FC |
930 | die("remote-helper doesn't support push; refspec needed"); |
931 | ||
30261094 | 932 | set_common_push_options(transport, data->name, flags); |
510fa6f5 FC |
933 | if (flags & TRANSPORT_PUSH_FORCE) { |
934 | if (set_helper_option(transport, "force", "true") != 0) | |
935 | warning("helper %s does not support 'force'", data->name); | |
936 | } | |
937 | ||
73b49a75 SR |
938 | helper = get_helper(transport); |
939 | ||
940 | write_constant(helper->in, "export\n"); | |
941 | ||
73b49a75 SR |
942 | for (ref = remote_refs; ref; ref = ref->next) { |
943 | char *private; | |
27912a03 | 944 | struct object_id oid; |
73b49a75 | 945 | |
d000414e | 946 | private = apply_refspecs(&data->rs, ref->name); |
e82caf38 | 947 | if (private && !get_oid(private, &oid)) { |
73b49a75 | 948 | strbuf_addf(&buf, "^%s", private); |
176cb979 RS |
949 | string_list_append_nodup(&revlist_args, |
950 | strbuf_detach(&buf, NULL)); | |
27912a03 | 951 | oidcpy(&ref->old_oid, &oid); |
73b49a75 | 952 | } |
2faa1527 | 953 | free(private); |
73b49a75 | 954 | |
67c9c782 | 955 | if (ref->peer_ref) { |
d98c8153 | 956 | if (strcmp(ref->name, ref->peer_ref->name)) { |
f3d03763 FC |
957 | if (!ref->deletion) { |
958 | const char *name; | |
959 | int flag; | |
960 | ||
961 | /* Follow symbolic refs (mainly for HEAD). */ | |
49e61479 | 962 | name = resolve_ref_unsafe(ref->peer_ref->name, |
963 | RESOLVE_REF_READING, | |
964 | &oid, &flag); | |
f3d03763 FC |
965 | if (!name || !(flag & REF_ISSYMREF)) |
966 | name = ref->peer_ref->name; | |
9193f742 | 967 | |
f3d03763 FC |
968 | strbuf_addf(&buf, "%s:%s", name, ref->name); |
969 | } else | |
970 | strbuf_addf(&buf, ":%s", ref->name); | |
9193f742 | 971 | |
d98c8153 FC |
972 | string_list_append(&revlist_args, "--refspec"); |
973 | string_list_append(&revlist_args, buf.buf); | |
974 | strbuf_release(&buf); | |
975 | } | |
f3d03763 FC |
976 | if (!ref->deletion) |
977 | string_list_append(&revlist_args, ref->peer_ref->name); | |
67c9c782 | 978 | } |
73b49a75 SR |
979 | } |
980 | ||
a515ebe9 | 981 | if (get_exporter(transport, &exporter, &revlist_args)) |
73b49a75 SR |
982 | die("Couldn't run fast-export"); |
983 | ||
d98c8153 FC |
984 | string_list_clear(&revlist_args, 1); |
985 | ||
cc567322 SR |
986 | if (finish_command(&exporter)) |
987 | die("Error while running fast-export"); | |
3994e64d FC |
988 | if (push_update_refs_status(data, remote_refs, flags)) |
989 | return 1; | |
990 | ||
991 | if (data->export_marks) { | |
992 | strbuf_addf(&buf, "%s.tmp", data->export_marks); | |
993 | rename(buf.buf, data->export_marks); | |
994 | strbuf_release(&buf); | |
995 | } | |
996 | ||
997 | return 0; | |
73b49a75 SR |
998 | } |
999 | ||
1000 | static int push_refs(struct transport *transport, | |
1001 | struct ref *remote_refs, int flags) | |
1002 | { | |
1003 | struct helper_data *data = transport->data; | |
1004 | ||
1005 | if (process_connect(transport, 1)) { | |
1006 | do_take_over(transport); | |
e967ca38 | 1007 | return transport->vtable->push_refs(transport, remote_refs, flags); |
73b49a75 SR |
1008 | } |
1009 | ||
1010 | if (!remote_refs) { | |
1011 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
1012 | "Perhaps you should specify a branch such as 'master'.\n"); | |
1013 | return 0; | |
1014 | } | |
1015 | ||
1016 | if (data->push) | |
1017 | return push_refs_with_push(transport, remote_refs, flags); | |
1018 | ||
1019 | if (data->export) | |
1020 | return push_refs_with_export(transport, remote_refs, flags); | |
1021 | ||
1022 | return -1; | |
1023 | } | |
1024 | ||
1025 | ||
f8ec9167 DB |
1026 | static int has_attribute(const char *attrs, const char *attr) { |
1027 | int len; | |
1028 | if (!attrs) | |
1029 | return 0; | |
1030 | ||
1031 | len = strlen(attr); | |
1032 | for (;;) { | |
1033 | const char *space = strchrnul(attrs, ' '); | |
1034 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
1035 | return 1; | |
1036 | if (!*space) | |
1037 | return 0; | |
1038 | attrs = space + 1; | |
1039 | } | |
1040 | } | |
1041 | ||
834cf34b BW |
1042 | static struct ref *get_refs_list(struct transport *transport, int for_push, |
1043 | const struct argv_array *ref_prefixes) | |
6eb996b5 | 1044 | { |
292ce46b | 1045 | struct helper_data *data = transport->data; |
6eb996b5 DB |
1046 | struct child_process *helper; |
1047 | struct ref *ret = NULL; | |
1048 | struct ref **tail = &ret; | |
1049 | struct ref *posn; | |
1050 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
1051 | |
1052 | helper = get_helper(transport); | |
2d14d65c | 1053 | |
fa8c097c IL |
1054 | if (process_connect(transport, for_push)) { |
1055 | do_take_over(transport); | |
834cf34b | 1056 | return transport->vtable->get_refs_list(transport, for_push, ref_prefixes); |
fa8c097c IL |
1057 | } |
1058 | ||
ae4efe19 SP |
1059 | if (data->push && for_push) |
1060 | write_str_in_full(helper->in, "list for-push\n"); | |
1061 | else | |
1062 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 1063 | |
6eb996b5 DB |
1064 | while (1) { |
1065 | char *eov, *eon; | |
5931b33e FC |
1066 | if (recvline(data, &buf)) |
1067 | exit(128); | |
6eb996b5 DB |
1068 | |
1069 | if (!*buf.buf) | |
1070 | break; | |
1071 | ||
1072 | eov = strchr(buf.buf, ' '); | |
1073 | if (!eov) | |
1074 | die("Malformed response in ref list: %s", buf.buf); | |
1075 | eon = strchr(eov + 1, ' '); | |
1076 | *eov = '\0'; | |
1077 | if (eon) | |
1078 | *eon = '\0'; | |
1079 | *tail = alloc_ref(eov + 1); | |
1080 | if (buf.buf[0] == '@') | |
1081 | (*tail)->symref = xstrdup(buf.buf + 1); | |
1082 | else if (buf.buf[0] != '?') | |
f4e54d02 | 1083 | get_oid_hex(buf.buf, &(*tail)->old_oid); |
f8ec9167 DB |
1084 | if (eon) { |
1085 | if (has_attribute(eon + 1, "unchanged")) { | |
1086 | (*tail)->status |= REF_STATUS_UPTODATE; | |
34c290a6 | 1087 | if (read_ref((*tail)->name, &(*tail)->old_oid) < 0) |
3c5077fe | 1088 | die(_("Could not read ref %s"), |
ae25fd39 | 1089 | (*tail)->name); |
f8ec9167 DB |
1090 | } |
1091 | } | |
6eb996b5 DB |
1092 | tail = &((*tail)->next); |
1093 | } | |
bf3c523c IL |
1094 | if (debug) |
1095 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
1096 | strbuf_release(&buf); |
1097 | ||
1098 | for (posn = ret; posn; posn = posn->next) | |
1099 | resolve_remote_symref(posn, ret); | |
1100 | ||
1101 | return ret; | |
1102 | } | |
1103 | ||
e967ca38 JT |
1104 | static struct transport_vtable vtable = { |
1105 | set_helper_option, | |
1106 | get_refs_list, | |
1107 | fetch, | |
1108 | push_refs, | |
1109 | connect_helper, | |
1110 | release_helper | |
1111 | }; | |
1112 | ||
c9e388bb | 1113 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 | 1114 | { |
92e25b6b | 1115 | struct helper_data *data = xcalloc(1, sizeof(*data)); |
c9e388bb | 1116 | data->name = name; |
6eb996b5 | 1117 | |
a5adaced JK |
1118 | transport_check_allowed(name); |
1119 | ||
bf3c523c IL |
1120 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
1121 | debug = 1; | |
1122 | ||
6eb996b5 | 1123 | transport->data = data; |
e967ca38 | 1124 | transport->vtable = &vtable; |
61b075bd | 1125 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
1126 | return 0; |
1127 | } | |
419f37db IL |
1128 | |
1129 | /* | |
1130 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
1131 | * buffer less), so attempt reads and writes with up to that size. | |
1132 | */ | |
1133 | #define BUFFERSIZE 65536 | |
1134 | /* This should be enough to hold debugging message. */ | |
1135 | #define PBUFFERSIZE 8192 | |
1136 | ||
1137 | /* Print bidirectional transfer loop debug message. */ | |
4621085b | 1138 | __attribute__((format (printf, 1, 2))) |
419f37db IL |
1139 | static void transfer_debug(const char *fmt, ...) |
1140 | { | |
6cdf8a79 MÅ |
1141 | /* |
1142 | * NEEDSWORK: This function is sometimes used from multiple threads, and | |
1143 | * we end up using debug_enabled racily. That "should not matter" since | |
1144 | * we always write the same value, but it's still wrong. This function | |
1145 | * is listed in .tsan-suppressions for the time being. | |
1146 | */ | |
1147 | ||
419f37db IL |
1148 | va_list args; |
1149 | char msgbuf[PBUFFERSIZE]; | |
1150 | static int debug_enabled = -1; | |
1151 | ||
1152 | if (debug_enabled < 0) | |
1153 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
1154 | if (!debug_enabled) | |
1155 | return; | |
1156 | ||
1157 | va_start(args, fmt); | |
1158 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
1159 | va_end(args); | |
1160 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
1161 | } | |
1162 | ||
1163 | /* Stream state: More data may be coming in this direction. */ | |
2e3a16b2 | 1164 | #define SSTATE_TRANSFERRING 0 |
419f37db IL |
1165 | /* |
1166 | * Stream state: No more data coming in this direction, flushing rest of | |
1167 | * data. | |
1168 | */ | |
1169 | #define SSTATE_FLUSHING 1 | |
1170 | /* Stream state: Transfer in this direction finished. */ | |
1171 | #define SSTATE_FINISHED 2 | |
1172 | ||
2e3a16b2 | 1173 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING) |
419f37db IL |
1174 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) |
1175 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
1176 | ||
1177 | /* Unidirectional transfer. */ | |
1178 | struct unidirectional_transfer { | |
1179 | /* Source */ | |
1180 | int src; | |
1181 | /* Destination */ | |
1182 | int dest; | |
1183 | /* Is source socket? */ | |
1184 | int src_is_sock; | |
1185 | /* Is destination socket? */ | |
1186 | int dest_is_sock; | |
41ccfdd9 | 1187 | /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */ |
419f37db IL |
1188 | int state; |
1189 | /* Buffer. */ | |
1190 | char buf[BUFFERSIZE]; | |
1191 | /* Buffer used. */ | |
1192 | size_t bufuse; | |
1193 | /* Name of source. */ | |
1194 | const char *src_name; | |
1195 | /* Name of destination. */ | |
1196 | const char *dest_name; | |
1197 | }; | |
1198 | ||
1199 | /* Closes the target (for writing) if transfer has finished. */ | |
1200 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
1201 | { | |
1202 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
1203 | t->state = SSTATE_FINISHED; | |
1204 | if (t->dest_is_sock) | |
1205 | shutdown(t->dest, SHUT_WR); | |
1206 | else | |
1207 | close(t->dest); | |
1208 | transfer_debug("Closed %s.", t->dest_name); | |
1209 | } | |
1210 | } | |
1211 | ||
1212 | /* | |
832c0e5e | 1213 | * Tries to read data from source into buffer. If buffer is full, |
419f37db IL |
1214 | * no data is read. Returns 0 on success, -1 on error. |
1215 | */ | |
1216 | static int udt_do_read(struct unidirectional_transfer *t) | |
1217 | { | |
1218 | ssize_t bytes; | |
1219 | ||
1220 | if (t->bufuse == BUFFERSIZE) | |
1221 | return 0; /* No space for more. */ | |
1222 | ||
1223 | transfer_debug("%s is readable", t->src_name); | |
1224 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
1225 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1226 | errno != EINTR) { | |
1fee1dce | 1227 | error_errno("read(%s) failed", t->src_name); |
419f37db IL |
1228 | return -1; |
1229 | } else if (bytes == 0) { | |
1230 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
4621085b | 1231 | t->src_name, (int)t->bufuse); |
419f37db IL |
1232 | t->state = SSTATE_FLUSHING; |
1233 | } else if (bytes > 0) { | |
1234 | t->bufuse += bytes; | |
1235 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
1236 | (int)bytes, t->src_name, (int)t->bufuse); | |
1237 | } | |
1238 | return 0; | |
1239 | } | |
1240 | ||
1241 | /* Tries to write data from buffer into destination. If buffer is empty, | |
1242 | * no data is written. Returns 0 on success, -1 on error. | |
1243 | */ | |
1244 | static int udt_do_write(struct unidirectional_transfer *t) | |
1245 | { | |
803dbdb9 | 1246 | ssize_t bytes; |
419f37db IL |
1247 | |
1248 | if (t->bufuse == 0) | |
1249 | return 0; /* Nothing to write. */ | |
1250 | ||
1251 | transfer_debug("%s is writable", t->dest_name); | |
7edc02f4 EFL |
1252 | bytes = xwrite(t->dest, t->buf, t->bufuse); |
1253 | if (bytes < 0 && errno != EWOULDBLOCK) { | |
1fee1dce | 1254 | error_errno("write(%s) failed", t->dest_name); |
419f37db IL |
1255 | return -1; |
1256 | } else if (bytes > 0) { | |
1257 | t->bufuse -= bytes; | |
1258 | if (t->bufuse) | |
1259 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1260 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1261 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1262 | } | |
1263 | return 0; | |
1264 | } | |
1265 | ||
1266 | ||
1267 | /* State of bidirectional transfer loop. */ | |
1268 | struct bidirectional_transfer_state { | |
1269 | /* Direction from program to git. */ | |
1270 | struct unidirectional_transfer ptg; | |
1271 | /* Direction from git to program. */ | |
1272 | struct unidirectional_transfer gtp; | |
1273 | }; | |
1274 | ||
1275 | static void *udt_copy_task_routine(void *udt) | |
1276 | { | |
1277 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1278 | while (t->state != SSTATE_FINISHED) { | |
1279 | if (STATE_NEEDS_READING(t->state)) | |
1280 | if (udt_do_read(t)) | |
1281 | return NULL; | |
1282 | if (STATE_NEEDS_WRITING(t->state)) | |
1283 | if (udt_do_write(t)) | |
1284 | return NULL; | |
1285 | if (STATE_NEEDS_CLOSING(t->state)) | |
1286 | udt_close_if_finished(t); | |
1287 | } | |
1288 | return udt; /* Just some non-NULL value. */ | |
1289 | } | |
1290 | ||
1291 | #ifndef NO_PTHREADS | |
1292 | ||
1293 | /* | |
98e023de | 1294 | * Join thread, with appropriate errors on failure. Name is name for the |
419f37db IL |
1295 | * thread (for error messages). Returns 0 on success, 1 on failure. |
1296 | */ | |
1297 | static int tloop_join(pthread_t thread, const char *name) | |
1298 | { | |
1299 | int err; | |
1300 | void *tret; | |
1301 | err = pthread_join(thread, &tret); | |
1302 | if (!tret) { | |
1303 | error("%s thread failed", name); | |
1304 | return 1; | |
1305 | } | |
1306 | if (err) { | |
1307 | error("%s thread failed to join: %s", name, strerror(err)); | |
1308 | return 1; | |
1309 | } | |
1310 | return 0; | |
1311 | } | |
1312 | ||
1313 | /* | |
1314 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1315 | * -1 on failure. | |
1316 | */ | |
1317 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1318 | { | |
1319 | pthread_t gtp_thread; | |
1320 | pthread_t ptg_thread; | |
1321 | int err; | |
1322 | int ret = 0; | |
1323 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1324 | &s->gtp); | |
1325 | if (err) | |
1326 | die("Can't start thread for copying data: %s", strerror(err)); | |
1327 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, | |
1328 | &s->ptg); | |
1329 | if (err) | |
1330 | die("Can't start thread for copying data: %s", strerror(err)); | |
1331 | ||
1332 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1333 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1334 | return ret; | |
1335 | } | |
1336 | #else | |
1337 | ||
1338 | /* Close the source and target (for writing) for transfer. */ | |
1339 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1340 | { | |
1341 | t->state = SSTATE_FINISHED; | |
1342 | /* | |
1343 | * Socket read end left open isn't a disaster if nobody | |
1344 | * attempts to read from it (mingw compat headers do not | |
1345 | * have SHUT_RD)... | |
1346 | * | |
1347 | * We can't fully close the socket since otherwise gtp | |
1348 | * task would first close the socket it sends data to | |
1349 | * while closing the ptg file descriptors. | |
1350 | */ | |
1351 | if (!t->src_is_sock) | |
1352 | close(t->src); | |
1353 | if (t->dest_is_sock) | |
1354 | shutdown(t->dest, SHUT_WR); | |
1355 | else | |
1356 | close(t->dest); | |
1357 | } | |
1358 | ||
1359 | /* | |
98e023de | 1360 | * Join process, with appropriate errors on failure. Name is name for the |
419f37db IL |
1361 | * process (for error messages). Returns 0 on success, 1 on failure. |
1362 | */ | |
1363 | static int tloop_join(pid_t pid, const char *name) | |
1364 | { | |
1365 | int tret; | |
1366 | if (waitpid(pid, &tret, 0) < 0) { | |
1fee1dce | 1367 | error_errno("%s process failed to wait", name); |
419f37db IL |
1368 | return 1; |
1369 | } | |
1370 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
1371 | error("%s process failed", name); | |
1372 | return 1; | |
1373 | } | |
1374 | return 0; | |
1375 | } | |
1376 | ||
1377 | /* | |
1378 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1379 | * -1 on failure. | |
1380 | */ | |
1381 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1382 | { | |
1383 | pid_t pid1, pid2; | |
1384 | int ret = 0; | |
1385 | ||
1386 | /* Fork thread #1: git to program. */ | |
1387 | pid1 = fork(); | |
1388 | if (pid1 < 0) | |
1389 | die_errno("Can't start thread for copying data"); | |
1390 | else if (pid1 == 0) { | |
1391 | udt_kill_transfer(&s->ptg); | |
1392 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1393 | } | |
1394 | ||
1395 | /* Fork thread #2: program to git. */ | |
1396 | pid2 = fork(); | |
1397 | if (pid2 < 0) | |
1398 | die_errno("Can't start thread for copying data"); | |
1399 | else if (pid2 == 0) { | |
1400 | udt_kill_transfer(&s->gtp); | |
1401 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1402 | } | |
1403 | ||
1404 | /* | |
1405 | * Close both streams in parent as to not interfere with | |
1406 | * end of file detection and wait for both tasks to finish. | |
1407 | */ | |
1408 | udt_kill_transfer(&s->gtp); | |
1409 | udt_kill_transfer(&s->ptg); | |
1410 | ret |= tloop_join(pid1, "Git to program copy"); | |
1411 | ret |= tloop_join(pid2, "Program to git copy"); | |
1412 | return ret; | |
1413 | } | |
1414 | #endif | |
1415 | ||
1416 | /* | |
1417 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1418 | * Additionally filtering through given filter. If filter is NULL, uses | |
1419 | * identity filter. | |
1420 | */ | |
1421 | int bidirectional_transfer_loop(int input, int output) | |
1422 | { | |
1423 | struct bidirectional_transfer_state state; | |
1424 | ||
1425 | /* Fill the state fields. */ | |
1426 | state.ptg.src = input; | |
1427 | state.ptg.dest = 1; | |
1428 | state.ptg.src_is_sock = (input == output); | |
1429 | state.ptg.dest_is_sock = 0; | |
2e3a16b2 | 1430 | state.ptg.state = SSTATE_TRANSFERRING; |
419f37db IL |
1431 | state.ptg.bufuse = 0; |
1432 | state.ptg.src_name = "remote input"; | |
1433 | state.ptg.dest_name = "stdout"; | |
1434 | ||
1435 | state.gtp.src = 0; | |
1436 | state.gtp.dest = output; | |
1437 | state.gtp.src_is_sock = 0; | |
1438 | state.gtp.dest_is_sock = (input == output); | |
2e3a16b2 | 1439 | state.gtp.state = SSTATE_TRANSFERRING; |
419f37db IL |
1440 | state.gtp.bufuse = 0; |
1441 | state.gtp.src_name = "stdin"; | |
1442 | state.gtp.dest_name = "remote output"; | |
1443 | ||
1444 | return tloop_spawnwait_tasks(&state); | |
1445 | } |