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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" |
e967ca38 | 14 | #include "transport-internal.h" |
edc9caf7 | 15 | #include "protocol.h" |
7851b1e6 | 16 | |
bf3c523c IL |
17 | static int debug; |
18 | ||
9cba13ca | 19 | struct helper_data { |
6eb996b5 DB |
20 | const char *name; |
21 | struct child_process *helper; | |
292ce46b | 22 | FILE *out; |
ef08ef9e | 23 | unsigned fetch : 1, |
a24a32dd | 24 | import : 1, |
bfc366d9 | 25 | bidi_import : 1, |
73b49a75 | 26 | export : 1, |
ae4efe19 | 27 | option : 1, |
fa8c097c IL |
28 | push : 1, |
29 | connect : 1, | |
edc9caf7 | 30 | stateless_connect : 1, |
0d957a4d | 31 | signed_tags : 1, |
9ba38048 | 32 | check_connectivity : 1, |
597b831a MM |
33 | no_disconnect_req : 1, |
34 | no_private_update : 1; | |
a515ebe9 SR |
35 | char *export_marks; |
36 | char *import_marks; | |
72ff8943 DB |
37 | /* These go from remote name (as in "list") to private name */ |
38 | struct refspec *refspecs; | |
39 | int refspec_nr; | |
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; | |
72ff8943 DB |
109 | const char **refspecs = NULL; |
110 | int refspec_nr = 0; | |
111 | int refspec_alloc = 0; | |
61b075bd | 112 | int duped; |
6b02de3b | 113 | int code; |
6eb996b5 DB |
114 | |
115 | if (data->helper) | |
116 | return data->helper; | |
117 | ||
483bbd4e RS |
118 | helper = xmalloc(sizeof(*helper)); |
119 | child_process_init(helper); | |
6eb996b5 DB |
120 | helper->in = -1; |
121 | helper->out = -1; | |
122 | helper->err = 0; | |
e0ab2ac6 JK |
123 | argv_array_pushf(&helper->args, "git-remote-%s", data->name); |
124 | argv_array_push(&helper->args, transport->remote->name); | |
125 | argv_array_push(&helper->args, remove_ext_force(transport->url)); | |
6b02de3b IL |
126 | helper->git_cmd = 0; |
127 | helper->silent_exec_failure = 1; | |
e1735872 | 128 | |
4b0c3c77 JN |
129 | if (have_git_dir()) |
130 | argv_array_pushf(&helper->env_array, "%s=%s", | |
131 | GIT_DIR_ENVIRONMENT, get_git_dir()); | |
e1735872 | 132 | |
6b02de3b IL |
133 | code = start_command(helper); |
134 | if (code < 0 && errno == ENOENT) | |
135 | die("Unable to find remote helper for '%s'", data->name); | |
136 | else if (code != 0) | |
137 | exit(code); | |
138 | ||
6eb996b5 | 139 | data->helper = helper; |
fa8c097c | 140 | data->no_disconnect_req = 0; |
6eb996b5 | 141 | |
61b075bd | 142 | /* |
1a0c8dfd JH |
143 | * Open the output as FILE* so strbuf_getline_*() family of |
144 | * functions can be used. | |
61b075bd IL |
145 | * Do this with duped fd because fclose() will close the fd, |
146 | * and stuff like taking over will require the fd to remain. | |
61b075bd IL |
147 | */ |
148 | duped = dup(helper->out); | |
149 | if (duped < 0) | |
150 | die_errno("Can't dup helper output fd"); | |
151 | data->out = xfdopen(duped, "r"); | |
152 | ||
bf3c523c | 153 | write_constant(helper->in, "capabilities\n"); |
2d14d65c | 154 | |
6eb996b5 | 155 | while (1) { |
21a2d4ad | 156 | const char *capname, *arg; |
28ed5b35 | 157 | int mandatory = 0; |
5931b33e FC |
158 | if (recvline(data, &buf)) |
159 | exit(128); | |
6eb996b5 DB |
160 | |
161 | if (!*buf.buf) | |
162 | break; | |
28ed5b35 IL |
163 | |
164 | if (*buf.buf == '*') { | |
165 | capname = buf.buf + 1; | |
166 | mandatory = 1; | |
167 | } else | |
168 | capname = buf.buf; | |
169 | ||
bf3c523c | 170 | if (debug) |
28ed5b35 IL |
171 | fprintf(stderr, "Debug: Got cap %s\n", capname); |
172 | if (!strcmp(capname, "fetch")) | |
6eb996b5 | 173 | data->fetch = 1; |
28ed5b35 | 174 | else if (!strcmp(capname, "option")) |
ef08ef9e | 175 | data->option = 1; |
28ed5b35 | 176 | else if (!strcmp(capname, "push")) |
ae4efe19 | 177 | data->push = 1; |
28ed5b35 | 178 | else if (!strcmp(capname, "import")) |
e65e91ed | 179 | data->import = 1; |
bfc366d9 FA |
180 | else if (!strcmp(capname, "bidi-import")) |
181 | data->bidi_import = 1; | |
73b49a75 SR |
182 | else if (!strcmp(capname, "export")) |
183 | data->export = 1; | |
9ba38048 NTND |
184 | else if (!strcmp(capname, "check-connectivity")) |
185 | data->check_connectivity = 1; | |
21a2d4ad | 186 | else if (!data->refspecs && skip_prefix(capname, "refspec ", &arg)) { |
72ff8943 DB |
187 | ALLOC_GROW(refspecs, |
188 | refspec_nr + 1, | |
189 | refspec_alloc); | |
21a2d4ad | 190 | refspecs[refspec_nr++] = xstrdup(arg); |
fa8c097c IL |
191 | } else if (!strcmp(capname, "connect")) { |
192 | data->connect = 1; | |
edc9caf7 BW |
193 | } else if (!strcmp(capname, "stateless-connect")) { |
194 | data->stateless_connect = 1; | |
0d957a4d JK |
195 | } else if (!strcmp(capname, "signed-tags")) { |
196 | data->signed_tags = 1; | |
21a2d4ad JK |
197 | } else if (skip_prefix(capname, "export-marks ", &arg)) { |
198 | data->export_marks = xstrdup(arg); | |
199 | } else if (skip_prefix(capname, "import-marks ", &arg)) { | |
200 | data->import_marks = xstrdup(arg); | |
59556548 | 201 | } else if (starts_with(capname, "no-private-update")) { |
597b831a | 202 | data->no_private_update = 1; |
28ed5b35 | 203 | } else if (mandatory) { |
9517e6b8 | 204 | die("Unknown mandatory capability %s. This remote " |
82247e9b | 205 | "helper probably needs newer version of Git.", |
28ed5b35 | 206 | capname); |
72ff8943 DB |
207 | } |
208 | } | |
209 | if (refspecs) { | |
210 | int i; | |
211 | data->refspec_nr = refspec_nr; | |
212 | data->refspecs = parse_fetch_refspec(refspec_nr, refspecs); | |
b120ef3e | 213 | for (i = 0; i < refspec_nr; i++) |
72ff8943 | 214 | free((char *)refspecs[i]); |
72ff8943 | 215 | free(refspecs); |
a93b4a09 FC |
216 | } else if (data->import || data->bidi_import || data->export) { |
217 | warning("This remote helper should implement refspec capability."); | |
6eb996b5 | 218 | } |
b962dbdc | 219 | strbuf_release(&buf); |
bf3c523c IL |
220 | if (debug) |
221 | fprintf(stderr, "Debug: Capabilities complete.\n"); | |
2879bc3b | 222 | standard_options(transport); |
6eb996b5 DB |
223 | return data->helper; |
224 | } | |
225 | ||
226 | static int disconnect_helper(struct transport *transport) | |
227 | { | |
228 | struct helper_data *data = transport->data; | |
cc567322 | 229 | int res = 0; |
bf3c523c | 230 | |
6eb996b5 | 231 | if (data->helper) { |
bf3c523c IL |
232 | if (debug) |
233 | fprintf(stderr, "Debug: Disconnecting.\n"); | |
fa8c097c | 234 | if (!data->no_disconnect_req) { |
c34fe630 JK |
235 | /* |
236 | * Ignore write errors; there's nothing we can do, | |
237 | * since we're about to close the pipe anyway. And the | |
238 | * most likely error is EPIPE due to the helper dying | |
239 | * to report an error itself. | |
240 | */ | |
241 | sigchain_push(SIGPIPE, SIG_IGN); | |
242 | xwrite(data->helper->in, "\n", 1); | |
243 | sigchain_pop(SIGPIPE); | |
fa8c097c | 244 | } |
6eb996b5 | 245 | close(data->helper->in); |
61b075bd | 246 | close(data->helper->out); |
292ce46b | 247 | fclose(data->out); |
cc567322 | 248 | res = finish_command(data->helper); |
6a83d902 | 249 | FREE_AND_NULL(data->helper); |
6eb996b5 | 250 | } |
cc567322 | 251 | return res; |
6eb996b5 DB |
252 | } |
253 | ||
ef08ef9e SP |
254 | static const char *unsupported_options[] = { |
255 | TRANS_OPT_UPLOADPACK, | |
256 | TRANS_OPT_RECEIVEPACK, | |
257 | TRANS_OPT_THIN, | |
258 | TRANS_OPT_KEEP | |
259 | }; | |
23cd01ec | 260 | |
ef08ef9e SP |
261 | static const char *boolean_options[] = { |
262 | TRANS_OPT_THIN, | |
263 | TRANS_OPT_KEEP, | |
0ea47f9d | 264 | TRANS_OPT_FOLLOWTAGS, |
cccf74e2 | 265 | TRANS_OPT_DEEPEN_RELATIVE |
ef08ef9e SP |
266 | }; |
267 | ||
9318c5dd NTND |
268 | static int strbuf_set_helper_option(struct helper_data *data, |
269 | struct strbuf *buf) | |
270 | { | |
271 | int ret; | |
272 | ||
273 | sendline(data, buf); | |
274 | if (recvline(data, buf)) | |
275 | exit(128); | |
276 | ||
277 | if (!strcmp(buf->buf, "ok")) | |
278 | ret = 0; | |
279 | else if (starts_with(buf->buf, "error")) | |
280 | ret = -1; | |
281 | else if (!strcmp(buf->buf, "unsupported")) | |
282 | ret = 1; | |
283 | else { | |
284 | warning("%s unexpectedly said: '%s'", data->name, buf->buf); | |
285 | ret = 1; | |
286 | } | |
287 | return ret; | |
288 | } | |
289 | ||
a45a2600 NTND |
290 | static int string_list_set_helper_option(struct helper_data *data, |
291 | const char *name, | |
292 | struct string_list *list) | |
293 | { | |
294 | struct strbuf buf = STRBUF_INIT; | |
295 | int i, ret = 0; | |
296 | ||
297 | for (i = 0; i < list->nr; i++) { | |
298 | strbuf_addf(&buf, "option %s ", name); | |
299 | quote_c_style(list->items[i].string, &buf, NULL, 0); | |
300 | strbuf_addch(&buf, '\n'); | |
301 | ||
302 | if ((ret = strbuf_set_helper_option(data, &buf))) | |
303 | break; | |
304 | strbuf_reset(&buf); | |
305 | } | |
306 | strbuf_release(&buf); | |
307 | return ret; | |
308 | } | |
309 | ||
ef08ef9e SP |
310 | static int set_helper_option(struct transport *transport, |
311 | const char *name, const char *value) | |
312 | { | |
313 | struct helper_data *data = transport->data; | |
ef08ef9e SP |
314 | struct strbuf buf = STRBUF_INIT; |
315 | int i, ret, is_bool = 0; | |
316 | ||
bf3c523c IL |
317 | get_helper(transport); |
318 | ||
ef08ef9e SP |
319 | if (!data->option) |
320 | return 1; | |
321 | ||
a45a2600 NTND |
322 | if (!strcmp(name, "deepen-not")) |
323 | return string_list_set_helper_option(data, name, | |
324 | (struct string_list *)value); | |
325 | ||
ef08ef9e SP |
326 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { |
327 | if (!strcmp(name, unsupported_options[i])) | |
328 | return 1; | |
329 | } | |
330 | ||
331 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
332 | if (!strcmp(name, boolean_options[i])) { | |
333 | is_bool = 1; | |
334 | break; | |
335 | } | |
336 | } | |
337 | ||
338 | strbuf_addf(&buf, "option %s ", name); | |
339 | if (is_bool) | |
340 | strbuf_addstr(&buf, value ? "true" : "false"); | |
341 | else | |
342 | quote_c_style(value, &buf, NULL, 0); | |
343 | strbuf_addch(&buf, '\n'); | |
344 | ||
9318c5dd | 345 | ret = strbuf_set_helper_option(data, &buf); |
ef08ef9e SP |
346 | strbuf_release(&buf); |
347 | return ret; | |
348 | } | |
349 | ||
350 | static void standard_options(struct transport *t) | |
351 | { | |
352 | char buf[16]; | |
ef08ef9e | 353 | int v = t->verbose; |
ef08ef9e | 354 | |
d01b3c02 | 355 | set_helper_option(t, "progress", t->progress ? "true" : "false"); |
ef08ef9e | 356 | |
8c5acfb9 | 357 | xsnprintf(buf, sizeof(buf), "%d", v + 1); |
ef08ef9e | 358 | set_helper_option(t, "verbosity", buf); |
c915f11e EW |
359 | |
360 | switch (t->family) { | |
361 | case TRANSPORT_FAMILY_ALL: | |
362 | /* | |
363 | * this is already the default, | |
364 | * do not break old remote helpers by setting "all" here | |
365 | */ | |
366 | break; | |
367 | case TRANSPORT_FAMILY_IPV4: | |
368 | set_helper_option(t, "family", "ipv4"); | |
369 | break; | |
370 | case TRANSPORT_FAMILY_IPV6: | |
371 | set_helper_option(t, "family", "ipv6"); | |
372 | break; | |
373 | } | |
ef08ef9e SP |
374 | } |
375 | ||
f2a37151 DB |
376 | static int release_helper(struct transport *transport) |
377 | { | |
cc567322 | 378 | int res = 0; |
72ff8943 DB |
379 | struct helper_data *data = transport->data; |
380 | free_refspec(data->refspec_nr, data->refspecs); | |
381 | data->refspecs = NULL; | |
cc567322 | 382 | res = disconnect_helper(transport); |
f2a37151 | 383 | free(transport->data); |
cc567322 | 384 | return res; |
f2a37151 DB |
385 | } |
386 | ||
6eb996b5 | 387 | static int fetch_with_fetch(struct transport *transport, |
37148311 | 388 | int nr_heads, struct ref **to_fetch) |
6eb996b5 | 389 | { |
292ce46b | 390 | struct helper_data *data = transport->data; |
6eb996b5 DB |
391 | int i; |
392 | struct strbuf buf = STRBUF_INIT; | |
393 | ||
394 | for (i = 0; i < nr_heads; i++) { | |
1088261f | 395 | const struct ref *posn = to_fetch[i]; |
6eb996b5 DB |
396 | if (posn->status & REF_STATUS_UPTODATE) |
397 | continue; | |
2d14d65c DB |
398 | |
399 | strbuf_addf(&buf, "fetch %s %s\n", | |
f4e54d02 | 400 | oid_to_hex(&posn->old_oid), |
33cae542 | 401 | posn->symref ? posn->symref : posn->name); |
292ce46b | 402 | } |
2d14d65c | 403 | |
292ce46b | 404 | strbuf_addch(&buf, '\n'); |
bf3c523c | 405 | sendline(data, &buf); |
292ce46b SP |
406 | |
407 | while (1) { | |
5931b33e FC |
408 | if (recvline(data, &buf)) |
409 | exit(128); | |
292ce46b | 410 | |
59556548 | 411 | if (starts_with(buf.buf, "lock ")) { |
292ce46b SP |
412 | const char *name = buf.buf + 5; |
413 | if (transport->pack_lockfile) | |
414 | warning("%s also locked %s", data->name, name); | |
415 | else | |
416 | transport->pack_lockfile = xstrdup(name); | |
417 | } | |
9ba38048 NTND |
418 | else if (data->check_connectivity && |
419 | data->transport_options.check_self_contained_and_connected && | |
420 | !strcmp(buf.buf, "connectivity-ok")) | |
421 | data->transport_options.self_contained_and_connected = 1; | |
292ce46b SP |
422 | else if (!buf.len) |
423 | break; | |
424 | else | |
425 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
6eb996b5 | 426 | } |
292ce46b | 427 | strbuf_release(&buf); |
6eb996b5 DB |
428 | return 0; |
429 | } | |
430 | ||
e65e91ed DB |
431 | static int get_importer(struct transport *transport, struct child_process *fastimport) |
432 | { | |
433 | struct child_process *helper = get_helper(transport); | |
bfc366d9 | 434 | struct helper_data *data = transport->data; |
bfc366d9 | 435 | int cat_blob_fd, code; |
483bbd4e | 436 | child_process_init(fastimport); |
e65e91ed | 437 | fastimport->in = helper->out; |
173fd1a1 JK |
438 | argv_array_push(&fastimport->args, "fast-import"); |
439 | argv_array_push(&fastimport->args, debug ? "--stats" : "--quiet"); | |
e65e91ed | 440 | |
bfc366d9 FA |
441 | if (data->bidi_import) { |
442 | cat_blob_fd = xdup(helper->in); | |
173fd1a1 | 443 | argv_array_pushf(&fastimport->args, "--cat-blob-fd=%d", cat_blob_fd); |
bfc366d9 | 444 | } |
e65e91ed | 445 | fastimport->git_cmd = 1; |
bfc366d9 FA |
446 | |
447 | code = start_command(fastimport); | |
448 | return code; | |
e65e91ed DB |
449 | } |
450 | ||
73b49a75 SR |
451 | static int get_exporter(struct transport *transport, |
452 | struct child_process *fastexport, | |
73b49a75 SR |
453 | struct string_list *revlist_args) |
454 | { | |
a515ebe9 | 455 | struct helper_data *data = transport->data; |
73b49a75 | 456 | struct child_process *helper = get_helper(transport); |
2aeae40a | 457 | int i; |
852e54bc | 458 | |
8828f298 | 459 | child_process_init(fastexport); |
73b49a75 SR |
460 | |
461 | /* we need to duplicate helper->in because we want to use it after | |
462 | * fastexport is done with it. */ | |
463 | fastexport->out = dup(helper->in); | |
2aeae40a JK |
464 | argv_array_push(&fastexport->args, "fast-export"); |
465 | argv_array_push(&fastexport->args, "--use-done-feature"); | |
466 | argv_array_push(&fastexport->args, data->signed_tags ? | |
467 | "--signed-tags=verbatim" : "--signed-tags=warn-strip"); | |
468 | if (data->export_marks) | |
469 | argv_array_pushf(&fastexport->args, "--export-marks=%s.tmp", data->export_marks); | |
470 | if (data->import_marks) | |
471 | argv_array_pushf(&fastexport->args, "--import-marks=%s", data->import_marks); | |
73b49a75 SR |
472 | |
473 | for (i = 0; i < revlist_args->nr; i++) | |
2aeae40a | 474 | argv_array_push(&fastexport->args, revlist_args->items[i].string); |
73b49a75 SR |
475 | |
476 | fastexport->git_cmd = 1; | |
477 | return start_command(fastexport); | |
478 | } | |
479 | ||
e65e91ed DB |
480 | static int fetch_with_import(struct transport *transport, |
481 | int nr_heads, struct ref **to_fetch) | |
482 | { | |
483 | struct child_process fastimport; | |
72ff8943 | 484 | struct helper_data *data = transport->data; |
e65e91ed DB |
485 | int i; |
486 | struct ref *posn; | |
487 | struct strbuf buf = STRBUF_INIT; | |
488 | ||
bf3c523c IL |
489 | get_helper(transport); |
490 | ||
e65e91ed DB |
491 | if (get_importer(transport, &fastimport)) |
492 | die("Couldn't run fast-import"); | |
493 | ||
494 | for (i = 0; i < nr_heads; i++) { | |
495 | posn = to_fetch[i]; | |
496 | if (posn->status & REF_STATUS_UPTODATE) | |
497 | continue; | |
498 | ||
33cae542 MH |
499 | strbuf_addf(&buf, "import %s\n", |
500 | posn->symref ? posn->symref : posn->name); | |
bf3c523c | 501 | sendline(data, &buf); |
e65e91ed DB |
502 | strbuf_reset(&buf); |
503 | } | |
9504bc9d SR |
504 | |
505 | write_constant(data->helper->in, "\n"); | |
bfc366d9 FA |
506 | /* |
507 | * remote-helpers that advertise the bidi-import capability are required to | |
508 | * buffer the complete batch of import commands until this newline before | |
509 | * sending data to fast-import. | |
510 | * These helpers read back data from fast-import on their stdin, which could | |
511 | * be mixed with import commands, otherwise. | |
512 | */ | |
9504bc9d | 513 | |
cc567322 SR |
514 | if (finish_command(&fastimport)) |
515 | die("Error while running fast-import"); | |
e65e91ed | 516 | |
dff9d65d FA |
517 | /* |
518 | * The fast-import stream of a remote helper that advertises | |
519 | * the "refspec" capability writes to the refs named after the | |
520 | * right hand side of the first refspec matching each ref we | |
521 | * were fetching. | |
522 | * | |
523 | * (If no "refspec" capability was specified, for historical | |
7a43c554 | 524 | * reasons we default to the equivalent of *:*.) |
dff9d65d FA |
525 | * |
526 | * Store the result in to_fetch[i].old_sha1. Callers such | |
527 | * as "git fetch" can use the value to write feedback to the | |
528 | * terminal, populate FETCH_HEAD, and determine what new value | |
529 | * should be written to peer_ref if the update is a | |
530 | * fast-forward or this is a forced update. | |
531 | */ | |
e65e91ed | 532 | for (i = 0; i < nr_heads; i++) { |
33cae542 | 533 | char *private, *name; |
e65e91ed DB |
534 | posn = to_fetch[i]; |
535 | if (posn->status & REF_STATUS_UPTODATE) | |
536 | continue; | |
33cae542 | 537 | name = posn->symref ? posn->symref : posn->name; |
72ff8943 | 538 | if (data->refspecs) |
33cae542 | 539 | private = apply_refspecs(data->refspecs, data->refspec_nr, name); |
72ff8943 | 540 | else |
33cae542 | 541 | private = xstrdup(name); |
d51b720f | 542 | if (private) { |
34c290a6 | 543 | if (read_ref(private, &posn->old_oid) < 0) |
ae25fd39 | 544 | die("Could not read ref %s", private); |
d51b720f MH |
545 | free(private); |
546 | } | |
e65e91ed | 547 | } |
b962dbdc | 548 | strbuf_release(&buf); |
e65e91ed DB |
549 | return 0; |
550 | } | |
551 | ||
176e85c1 | 552 | static int run_connect(struct transport *transport, struct strbuf *cmdbuf) |
fa8c097c IL |
553 | { |
554 | struct helper_data *data = transport->data; | |
176e85c1 BW |
555 | int ret = 0; |
556 | int duped; | |
fa8c097c | 557 | FILE *input; |
176e85c1 | 558 | struct child_process *helper; |
fa8c097c IL |
559 | |
560 | helper = get_helper(transport); | |
561 | ||
562 | /* | |
563 | * Yes, dup the pipe another time, as we need unbuffered version | |
564 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
565 | * stream buffering only can be changed before first I/O operation | |
566 | * on it. | |
567 | */ | |
568 | duped = dup(helper->out); | |
569 | if (duped < 0) | |
570 | die_errno("Can't dup helper output fd"); | |
571 | input = xfdopen(duped, "r"); | |
572 | setvbuf(input, NULL, _IONBF, 0); | |
573 | ||
176e85c1 BW |
574 | sendline(data, cmdbuf); |
575 | if (recvline_fh(input, cmdbuf)) | |
576 | exit(128); | |
577 | ||
578 | if (!strcmp(cmdbuf->buf, "")) { | |
579 | data->no_disconnect_req = 1; | |
580 | if (debug) | |
581 | fprintf(stderr, "Debug: Smart transport connection " | |
582 | "ready.\n"); | |
583 | ret = 1; | |
584 | } else if (!strcmp(cmdbuf->buf, "fallback")) { | |
585 | if (debug) | |
586 | fprintf(stderr, "Debug: Falling back to dumb " | |
587 | "transport.\n"); | |
588 | } else { | |
589 | die("Unknown response to connect: %s", | |
590 | cmdbuf->buf); | |
591 | } | |
592 | ||
593 | fclose(input); | |
594 | return ret; | |
595 | } | |
596 | ||
597 | static int process_connect_service(struct transport *transport, | |
598 | const char *name, const char *exec) | |
599 | { | |
600 | struct helper_data *data = transport->data; | |
601 | struct strbuf cmdbuf = STRBUF_INIT; | |
602 | int ret = 0; | |
603 | ||
fa8c097c IL |
604 | /* |
605 | * Handle --upload-pack and friends. This is fire and forget... | |
606 | * just warn if it fails. | |
607 | */ | |
608 | if (strcmp(name, exec)) { | |
176e85c1 | 609 | int r = set_helper_option(transport, "servpath", exec); |
fa8c097c IL |
610 | if (r > 0) |
611 | warning("Setting remote service path not supported by protocol."); | |
612 | else if (r < 0) | |
613 | warning("Invalid remote service path."); | |
614 | } | |
615 | ||
176e85c1 | 616 | if (data->connect) { |
fa8c097c | 617 | strbuf_addf(&cmdbuf, "connect %s\n", name); |
176e85c1 | 618 | ret = run_connect(transport, &cmdbuf); |
edc9caf7 BW |
619 | } else if (data->stateless_connect && |
620 | (get_protocol_version_config() == protocol_v2) && | |
621 | !strcmp("git-upload-pack", name)) { | |
622 | strbuf_addf(&cmdbuf, "stateless-connect %s\n", name); | |
623 | ret = run_connect(transport, &cmdbuf); | |
624 | if (ret) | |
625 | transport->stateless_rpc = 1; | |
176e85c1 | 626 | } |
fa8c097c | 627 | |
4168be8e | 628 | strbuf_release(&cmdbuf); |
fa8c097c IL |
629 | return ret; |
630 | } | |
631 | ||
632 | static int process_connect(struct transport *transport, | |
633 | int for_push) | |
634 | { | |
635 | struct helper_data *data = transport->data; | |
636 | const char *name; | |
637 | const char *exec; | |
638 | ||
639 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
640 | if (for_push) | |
641 | exec = data->transport_options.receivepack; | |
642 | else | |
643 | exec = data->transport_options.uploadpack; | |
644 | ||
645 | return process_connect_service(transport, name, exec); | |
646 | } | |
647 | ||
b236752a IL |
648 | static int connect_helper(struct transport *transport, const char *name, |
649 | const char *exec, int fd[2]) | |
650 | { | |
651 | struct helper_data *data = transport->data; | |
652 | ||
653 | /* Get_helper so connect is inited. */ | |
654 | get_helper(transport); | |
655 | if (!data->connect) | |
656 | die("Operation not supported by protocol."); | |
657 | ||
658 | if (!process_connect_service(transport, name, exec)) | |
659 | die("Can't connect to subservice %s.", name); | |
660 | ||
661 | fd[0] = data->helper->out; | |
662 | fd[1] = data->helper->in; | |
663 | return 0; | |
664 | } | |
665 | ||
6eb996b5 | 666 | static int fetch(struct transport *transport, |
37148311 | 667 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
668 | { |
669 | struct helper_data *data = transport->data; | |
670 | int i, count; | |
671 | ||
fa8c097c IL |
672 | if (process_connect(transport, 0)) { |
673 | do_take_over(transport); | |
e967ca38 | 674 | return transport->vtable->fetch(transport, nr_heads, to_fetch); |
fa8c097c IL |
675 | } |
676 | ||
6eb996b5 DB |
677 | count = 0; |
678 | for (i = 0; i < nr_heads; i++) | |
679 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
680 | count++; | |
681 | ||
682 | if (!count) | |
683 | return 0; | |
684 | ||
aab1beb0 MH |
685 | if (data->check_connectivity && |
686 | data->transport_options.check_self_contained_and_connected) | |
687 | set_helper_option(transport, "check-connectivity", "true"); | |
688 | ||
689 | if (transport->cloning) | |
690 | set_helper_option(transport, "cloning", "true"); | |
691 | ||
692 | if (data->transport_options.update_shallow) | |
693 | set_helper_option(transport, "update-shallow", "true"); | |
694 | ||
640d8b72 JH |
695 | if (data->transport_options.filter_options.choice) |
696 | set_helper_option( | |
697 | transport, "filter", | |
698 | data->transport_options.filter_options.filter_spec); | |
699 | ||
6eb996b5 DB |
700 | if (data->fetch) |
701 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
702 | ||
e65e91ed DB |
703 | if (data->import) |
704 | return fetch_with_import(transport, nr_heads, to_fetch); | |
705 | ||
6eb996b5 DB |
706 | return -1; |
707 | } | |
708 | ||
664059fb | 709 | static int push_update_ref_status(struct strbuf *buf, |
d2e73c6f SR |
710 | struct ref **ref, |
711 | struct ref *remote_refs) | |
712 | { | |
713 | char *refname, *msg; | |
f9e3c6be | 714 | int status, forced = 0; |
d2e73c6f | 715 | |
59556548 | 716 | if (starts_with(buf->buf, "ok ")) { |
d2e73c6f SR |
717 | status = REF_STATUS_OK; |
718 | refname = buf->buf + 3; | |
59556548 | 719 | } else if (starts_with(buf->buf, "error ")) { |
d2e73c6f SR |
720 | status = REF_STATUS_REMOTE_REJECT; |
721 | refname = buf->buf + 6; | |
722 | } else | |
82247e9b | 723 | die("expected ok/error, helper said '%s'", buf->buf); |
d2e73c6f SR |
724 | |
725 | msg = strchr(refname, ' '); | |
726 | if (msg) { | |
727 | struct strbuf msg_buf = STRBUF_INIT; | |
728 | const char *end; | |
729 | ||
730 | *msg++ = '\0'; | |
731 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
732 | msg = strbuf_detach(&msg_buf, NULL); | |
733 | else | |
734 | msg = xstrdup(msg); | |
735 | strbuf_release(&msg_buf); | |
736 | ||
737 | if (!strcmp(msg, "no match")) { | |
738 | status = REF_STATUS_NONE; | |
6a83d902 | 739 | FREE_AND_NULL(msg); |
d2e73c6f SR |
740 | } |
741 | else if (!strcmp(msg, "up to date")) { | |
742 | status = REF_STATUS_UPTODATE; | |
6a83d902 | 743 | FREE_AND_NULL(msg); |
d2e73c6f SR |
744 | } |
745 | else if (!strcmp(msg, "non-fast forward")) { | |
746 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
6a83d902 | 747 | FREE_AND_NULL(msg); |
d2e73c6f | 748 | } |
dbfeddb1 CR |
749 | else if (!strcmp(msg, "already exists")) { |
750 | status = REF_STATUS_REJECT_ALREADY_EXISTS; | |
6a83d902 | 751 | FREE_AND_NULL(msg); |
dbfeddb1 | 752 | } |
75e5c0dc JH |
753 | else if (!strcmp(msg, "fetch first")) { |
754 | status = REF_STATUS_REJECT_FETCH_FIRST; | |
6a83d902 | 755 | FREE_AND_NULL(msg); |
75e5c0dc JH |
756 | } |
757 | else if (!strcmp(msg, "needs force")) { | |
758 | status = REF_STATUS_REJECT_NEEDS_FORCE; | |
6a83d902 | 759 | FREE_AND_NULL(msg); |
75e5c0dc | 760 | } |
631b5ef2 JH |
761 | else if (!strcmp(msg, "stale info")) { |
762 | status = REF_STATUS_REJECT_STALE; | |
6a83d902 | 763 | FREE_AND_NULL(msg); |
631b5ef2 | 764 | } |
f9e3c6be FC |
765 | else if (!strcmp(msg, "forced update")) { |
766 | forced = 1; | |
6a83d902 | 767 | FREE_AND_NULL(msg); |
f9e3c6be | 768 | } |
d2e73c6f SR |
769 | } |
770 | ||
771 | if (*ref) | |
772 | *ref = find_ref_by_name(*ref, refname); | |
773 | if (!*ref) | |
774 | *ref = find_ref_by_name(remote_refs, refname); | |
775 | if (!*ref) { | |
776 | warning("helper reported unexpected status of %s", refname); | |
664059fb | 777 | return 1; |
d2e73c6f SR |
778 | } |
779 | ||
780 | if ((*ref)->status != REF_STATUS_NONE) { | |
781 | /* | |
782 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
783 | * status reported by the remote helper if the latter is 'no match'. | |
784 | */ | |
785 | if (status == REF_STATUS_NONE) | |
664059fb | 786 | return 1; |
d2e73c6f SR |
787 | } |
788 | ||
789 | (*ref)->status = status; | |
cf31f70c | 790 | (*ref)->forced_update |= forced; |
d2e73c6f | 791 | (*ref)->remote_status = msg; |
126aac5c | 792 | return !(status == REF_STATUS_OK); |
d2e73c6f SR |
793 | } |
794 | ||
0551a06c | 795 | static int push_update_refs_status(struct helper_data *data, |
5a75353f FC |
796 | struct ref *remote_refs, |
797 | int flags) | |
d2e73c6f SR |
798 | { |
799 | struct strbuf buf = STRBUF_INIT; | |
800 | struct ref *ref = remote_refs; | |
0551a06c FC |
801 | int ret = 0; |
802 | ||
d2e73c6f | 803 | for (;;) { |
664059fb FC |
804 | char *private; |
805 | ||
0551a06c FC |
806 | if (recvline(data, &buf)) { |
807 | ret = 1; | |
808 | break; | |
809 | } | |
810 | ||
d2e73c6f SR |
811 | if (!buf.len) |
812 | break; | |
813 | ||
664059fb FC |
814 | if (push_update_ref_status(&buf, &ref, remote_refs)) |
815 | continue; | |
816 | ||
5a75353f | 817 | if (flags & TRANSPORT_PUSH_DRY_RUN || !data->refspecs || data->no_private_update) |
664059fb FC |
818 | continue; |
819 | ||
820 | /* propagate back the update to the remote namespace */ | |
821 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); | |
822 | if (!private) | |
823 | continue; | |
ae077771 | 824 | update_ref("update by helper", private, &ref->new_oid, NULL, |
825 | 0, 0); | |
664059fb | 826 | free(private); |
d2e73c6f SR |
827 | } |
828 | strbuf_release(&buf); | |
0551a06c | 829 | return ret; |
d2e73c6f SR |
830 | } |
831 | ||
30261094 DB |
832 | static void set_common_push_options(struct transport *transport, |
833 | const char *name, int flags) | |
834 | { | |
835 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
836 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
837 | die("helper %s does not support dry-run", name); | |
838 | } else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) { | |
839 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0) | |
840 | die("helper %s does not support --signed", name); | |
841 | } else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) { | |
842 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0) | |
843 | die("helper %s does not support --signed=if-asked", name); | |
844 | } | |
438fc684 SB |
845 | |
846 | if (flags & TRANSPORT_PUSH_OPTIONS) { | |
847 | struct string_list_item *item; | |
848 | for_each_string_list_item(item, transport->push_options) | |
849 | if (set_helper_option(transport, "push-option", item->string) != 0) | |
850 | die("helper %s does not support 'push-option'", name); | |
851 | } | |
30261094 DB |
852 | } |
853 | ||
73b49a75 | 854 | static int push_refs_with_push(struct transport *transport, |
05c1eb10 | 855 | struct ref *remote_refs, int flags) |
ae4efe19 SP |
856 | { |
857 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
858 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
859 | struct helper_data *data = transport->data; | |
860 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 | 861 | struct ref *ref; |
05c1eb10 JH |
862 | struct string_list cas_options = STRING_LIST_INIT_DUP; |
863 | struct string_list_item *cas_option; | |
ae4efe19 | 864 | |
c0aa335c | 865 | get_helper(transport); |
ae4efe19 SP |
866 | if (!data->push) |
867 | return 1; | |
868 | ||
869 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 870 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
871 | continue; |
872 | ||
20e8b465 TRC |
873 | /* Check for statuses set by set_ref_status_for_push() */ |
874 | switch (ref->status) { | |
875 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
631b5ef2 | 876 | case REF_STATUS_REJECT_STALE: |
dbfeddb1 | 877 | case REF_STATUS_REJECT_ALREADY_EXISTS: |
20e8b465 | 878 | case REF_STATUS_UPTODATE: |
ae4efe19 | 879 | continue; |
20e8b465 TRC |
880 | default: |
881 | ; /* do nothing */ | |
ae4efe19 SP |
882 | } |
883 | ||
884 | if (force_all) | |
885 | ref->force = 1; | |
886 | ||
887 | strbuf_addstr(&buf, "push "); | |
888 | if (!ref->deletion) { | |
889 | if (ref->force) | |
890 | strbuf_addch(&buf, '+'); | |
891 | if (ref->peer_ref) | |
892 | strbuf_addstr(&buf, ref->peer_ref->name); | |
893 | else | |
f4e54d02 | 894 | strbuf_addstr(&buf, oid_to_hex(&ref->new_oid)); |
ae4efe19 SP |
895 | } |
896 | strbuf_addch(&buf, ':'); | |
897 | strbuf_addstr(&buf, ref->name); | |
898 | strbuf_addch(&buf, '\n'); | |
05c1eb10 JH |
899 | |
900 | /* | |
901 | * The "--force-with-lease" options without explicit | |
902 | * values to expect have already been expanded into | |
f4e54d02 | 903 | * the ref->old_oid_expect[] field; we can ignore |
05c1eb10 JH |
904 | * transport->smart_options->cas altogether and instead |
905 | * can enumerate them from the refs. | |
906 | */ | |
907 | if (ref->expect_old_sha1) { | |
908 | struct strbuf cas = STRBUF_INIT; | |
909 | strbuf_addf(&cas, "%s:%s", | |
f4e54d02 | 910 | ref->name, oid_to_hex(&ref->old_oid_expect)); |
176cb979 RS |
911 | string_list_append_nodup(&cas_options, |
912 | strbuf_detach(&cas, NULL)); | |
05c1eb10 | 913 | } |
ae4efe19 | 914 | } |
05c1eb10 JH |
915 | if (buf.len == 0) { |
916 | string_list_clear(&cas_options, 0); | |
d8f67d20 | 917 | return 0; |
05c1eb10 | 918 | } |
ae4efe19 | 919 | |
05c1eb10 JH |
920 | for_each_string_list_item(cas_option, &cas_options) |
921 | set_helper_option(transport, "cas", cas_option->string); | |
30261094 | 922 | set_common_push_options(transport, data->name, flags); |
ae4efe19 SP |
923 | |
924 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 925 | sendline(data, &buf); |
ae4efe19 | 926 | strbuf_release(&buf); |
176cb979 | 927 | string_list_clear(&cas_options, 0); |
d2e73c6f | 928 | |
0551a06c | 929 | return push_update_refs_status(data, remote_refs, flags); |
ae4efe19 SP |
930 | } |
931 | ||
73b49a75 SR |
932 | static int push_refs_with_export(struct transport *transport, |
933 | struct ref *remote_refs, int flags) | |
934 | { | |
935 | struct ref *ref; | |
936 | struct child_process *helper, exporter; | |
937 | struct helper_data *data = transport->data; | |
d98c8153 | 938 | struct string_list revlist_args = STRING_LIST_INIT_DUP; |
73b49a75 SR |
939 | struct strbuf buf = STRBUF_INIT; |
940 | ||
21610d82 FC |
941 | if (!data->refspecs) |
942 | die("remote-helper doesn't support push; refspec needed"); | |
943 | ||
30261094 | 944 | set_common_push_options(transport, data->name, flags); |
510fa6f5 FC |
945 | if (flags & TRANSPORT_PUSH_FORCE) { |
946 | if (set_helper_option(transport, "force", "true") != 0) | |
947 | warning("helper %s does not support 'force'", data->name); | |
948 | } | |
949 | ||
73b49a75 SR |
950 | helper = get_helper(transport); |
951 | ||
952 | write_constant(helper->in, "export\n"); | |
953 | ||
73b49a75 SR |
954 | for (ref = remote_refs; ref; ref = ref->next) { |
955 | char *private; | |
27912a03 | 956 | struct object_id oid; |
73b49a75 | 957 | |
73b49a75 | 958 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); |
e82caf38 | 959 | if (private && !get_oid(private, &oid)) { |
73b49a75 | 960 | strbuf_addf(&buf, "^%s", private); |
176cb979 RS |
961 | string_list_append_nodup(&revlist_args, |
962 | strbuf_detach(&buf, NULL)); | |
27912a03 | 963 | oidcpy(&ref->old_oid, &oid); |
73b49a75 | 964 | } |
2faa1527 | 965 | free(private); |
73b49a75 | 966 | |
67c9c782 | 967 | if (ref->peer_ref) { |
d98c8153 | 968 | if (strcmp(ref->name, ref->peer_ref->name)) { |
f3d03763 FC |
969 | if (!ref->deletion) { |
970 | const char *name; | |
971 | int flag; | |
972 | ||
973 | /* Follow symbolic refs (mainly for HEAD). */ | |
49e61479 | 974 | name = resolve_ref_unsafe(ref->peer_ref->name, |
975 | RESOLVE_REF_READING, | |
976 | &oid, &flag); | |
f3d03763 FC |
977 | if (!name || !(flag & REF_ISSYMREF)) |
978 | name = ref->peer_ref->name; | |
9193f742 | 979 | |
f3d03763 FC |
980 | strbuf_addf(&buf, "%s:%s", name, ref->name); |
981 | } else | |
982 | strbuf_addf(&buf, ":%s", ref->name); | |
9193f742 | 983 | |
d98c8153 FC |
984 | string_list_append(&revlist_args, "--refspec"); |
985 | string_list_append(&revlist_args, buf.buf); | |
986 | strbuf_release(&buf); | |
987 | } | |
f3d03763 FC |
988 | if (!ref->deletion) |
989 | string_list_append(&revlist_args, ref->peer_ref->name); | |
67c9c782 | 990 | } |
73b49a75 SR |
991 | } |
992 | ||
a515ebe9 | 993 | if (get_exporter(transport, &exporter, &revlist_args)) |
73b49a75 SR |
994 | die("Couldn't run fast-export"); |
995 | ||
d98c8153 FC |
996 | string_list_clear(&revlist_args, 1); |
997 | ||
cc567322 SR |
998 | if (finish_command(&exporter)) |
999 | die("Error while running fast-export"); | |
3994e64d FC |
1000 | if (push_update_refs_status(data, remote_refs, flags)) |
1001 | return 1; | |
1002 | ||
1003 | if (data->export_marks) { | |
1004 | strbuf_addf(&buf, "%s.tmp", data->export_marks); | |
1005 | rename(buf.buf, data->export_marks); | |
1006 | strbuf_release(&buf); | |
1007 | } | |
1008 | ||
1009 | return 0; | |
73b49a75 SR |
1010 | } |
1011 | ||
1012 | static int push_refs(struct transport *transport, | |
1013 | struct ref *remote_refs, int flags) | |
1014 | { | |
1015 | struct helper_data *data = transport->data; | |
1016 | ||
1017 | if (process_connect(transport, 1)) { | |
1018 | do_take_over(transport); | |
e967ca38 | 1019 | return transport->vtable->push_refs(transport, remote_refs, flags); |
73b49a75 SR |
1020 | } |
1021 | ||
1022 | if (!remote_refs) { | |
1023 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
1024 | "Perhaps you should specify a branch such as 'master'.\n"); | |
1025 | return 0; | |
1026 | } | |
1027 | ||
1028 | if (data->push) | |
1029 | return push_refs_with_push(transport, remote_refs, flags); | |
1030 | ||
1031 | if (data->export) | |
1032 | return push_refs_with_export(transport, remote_refs, flags); | |
1033 | ||
1034 | return -1; | |
1035 | } | |
1036 | ||
1037 | ||
f8ec9167 DB |
1038 | static int has_attribute(const char *attrs, const char *attr) { |
1039 | int len; | |
1040 | if (!attrs) | |
1041 | return 0; | |
1042 | ||
1043 | len = strlen(attr); | |
1044 | for (;;) { | |
1045 | const char *space = strchrnul(attrs, ' '); | |
1046 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
1047 | return 1; | |
1048 | if (!*space) | |
1049 | return 0; | |
1050 | attrs = space + 1; | |
1051 | } | |
1052 | } | |
1053 | ||
834cf34b BW |
1054 | static struct ref *get_refs_list(struct transport *transport, int for_push, |
1055 | const struct argv_array *ref_prefixes) | |
6eb996b5 | 1056 | { |
292ce46b | 1057 | struct helper_data *data = transport->data; |
6eb996b5 DB |
1058 | struct child_process *helper; |
1059 | struct ref *ret = NULL; | |
1060 | struct ref **tail = &ret; | |
1061 | struct ref *posn; | |
1062 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
1063 | |
1064 | helper = get_helper(transport); | |
2d14d65c | 1065 | |
fa8c097c IL |
1066 | if (process_connect(transport, for_push)) { |
1067 | do_take_over(transport); | |
834cf34b | 1068 | return transport->vtable->get_refs_list(transport, for_push, ref_prefixes); |
fa8c097c IL |
1069 | } |
1070 | ||
ae4efe19 SP |
1071 | if (data->push && for_push) |
1072 | write_str_in_full(helper->in, "list for-push\n"); | |
1073 | else | |
1074 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 1075 | |
6eb996b5 DB |
1076 | while (1) { |
1077 | char *eov, *eon; | |
5931b33e FC |
1078 | if (recvline(data, &buf)) |
1079 | exit(128); | |
6eb996b5 DB |
1080 | |
1081 | if (!*buf.buf) | |
1082 | break; | |
1083 | ||
1084 | eov = strchr(buf.buf, ' '); | |
1085 | if (!eov) | |
1086 | die("Malformed response in ref list: %s", buf.buf); | |
1087 | eon = strchr(eov + 1, ' '); | |
1088 | *eov = '\0'; | |
1089 | if (eon) | |
1090 | *eon = '\0'; | |
1091 | *tail = alloc_ref(eov + 1); | |
1092 | if (buf.buf[0] == '@') | |
1093 | (*tail)->symref = xstrdup(buf.buf + 1); | |
1094 | else if (buf.buf[0] != '?') | |
f4e54d02 | 1095 | get_oid_hex(buf.buf, &(*tail)->old_oid); |
f8ec9167 DB |
1096 | if (eon) { |
1097 | if (has_attribute(eon + 1, "unchanged")) { | |
1098 | (*tail)->status |= REF_STATUS_UPTODATE; | |
34c290a6 | 1099 | if (read_ref((*tail)->name, &(*tail)->old_oid) < 0) |
3c5077fe | 1100 | die(_("Could not read ref %s"), |
ae25fd39 | 1101 | (*tail)->name); |
f8ec9167 DB |
1102 | } |
1103 | } | |
6eb996b5 DB |
1104 | tail = &((*tail)->next); |
1105 | } | |
bf3c523c IL |
1106 | if (debug) |
1107 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
1108 | strbuf_release(&buf); |
1109 | ||
1110 | for (posn = ret; posn; posn = posn->next) | |
1111 | resolve_remote_symref(posn, ret); | |
1112 | ||
1113 | return ret; | |
1114 | } | |
1115 | ||
e967ca38 JT |
1116 | static struct transport_vtable vtable = { |
1117 | set_helper_option, | |
1118 | get_refs_list, | |
1119 | fetch, | |
1120 | push_refs, | |
1121 | connect_helper, | |
1122 | release_helper | |
1123 | }; | |
1124 | ||
c9e388bb | 1125 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 | 1126 | { |
92e25b6b | 1127 | struct helper_data *data = xcalloc(1, sizeof(*data)); |
c9e388bb | 1128 | data->name = name; |
6eb996b5 | 1129 | |
a5adaced JK |
1130 | transport_check_allowed(name); |
1131 | ||
bf3c523c IL |
1132 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
1133 | debug = 1; | |
1134 | ||
6eb996b5 | 1135 | transport->data = data; |
e967ca38 | 1136 | transport->vtable = &vtable; |
61b075bd | 1137 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
1138 | return 0; |
1139 | } | |
419f37db IL |
1140 | |
1141 | /* | |
1142 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
1143 | * buffer less), so attempt reads and writes with up to that size. | |
1144 | */ | |
1145 | #define BUFFERSIZE 65536 | |
1146 | /* This should be enough to hold debugging message. */ | |
1147 | #define PBUFFERSIZE 8192 | |
1148 | ||
1149 | /* Print bidirectional transfer loop debug message. */ | |
4621085b | 1150 | __attribute__((format (printf, 1, 2))) |
419f37db IL |
1151 | static void transfer_debug(const char *fmt, ...) |
1152 | { | |
6cdf8a79 MÅ |
1153 | /* |
1154 | * NEEDSWORK: This function is sometimes used from multiple threads, and | |
1155 | * we end up using debug_enabled racily. That "should not matter" since | |
1156 | * we always write the same value, but it's still wrong. This function | |
1157 | * is listed in .tsan-suppressions for the time being. | |
1158 | */ | |
1159 | ||
419f37db IL |
1160 | va_list args; |
1161 | char msgbuf[PBUFFERSIZE]; | |
1162 | static int debug_enabled = -1; | |
1163 | ||
1164 | if (debug_enabled < 0) | |
1165 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
1166 | if (!debug_enabled) | |
1167 | return; | |
1168 | ||
1169 | va_start(args, fmt); | |
1170 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
1171 | va_end(args); | |
1172 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
1173 | } | |
1174 | ||
1175 | /* Stream state: More data may be coming in this direction. */ | |
2e3a16b2 | 1176 | #define SSTATE_TRANSFERRING 0 |
419f37db IL |
1177 | /* |
1178 | * Stream state: No more data coming in this direction, flushing rest of | |
1179 | * data. | |
1180 | */ | |
1181 | #define SSTATE_FLUSHING 1 | |
1182 | /* Stream state: Transfer in this direction finished. */ | |
1183 | #define SSTATE_FINISHED 2 | |
1184 | ||
2e3a16b2 | 1185 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING) |
419f37db IL |
1186 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) |
1187 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
1188 | ||
1189 | /* Unidirectional transfer. */ | |
1190 | struct unidirectional_transfer { | |
1191 | /* Source */ | |
1192 | int src; | |
1193 | /* Destination */ | |
1194 | int dest; | |
1195 | /* Is source socket? */ | |
1196 | int src_is_sock; | |
1197 | /* Is destination socket? */ | |
1198 | int dest_is_sock; | |
41ccfdd9 | 1199 | /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */ |
419f37db IL |
1200 | int state; |
1201 | /* Buffer. */ | |
1202 | char buf[BUFFERSIZE]; | |
1203 | /* Buffer used. */ | |
1204 | size_t bufuse; | |
1205 | /* Name of source. */ | |
1206 | const char *src_name; | |
1207 | /* Name of destination. */ | |
1208 | const char *dest_name; | |
1209 | }; | |
1210 | ||
1211 | /* Closes the target (for writing) if transfer has finished. */ | |
1212 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
1213 | { | |
1214 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
1215 | t->state = SSTATE_FINISHED; | |
1216 | if (t->dest_is_sock) | |
1217 | shutdown(t->dest, SHUT_WR); | |
1218 | else | |
1219 | close(t->dest); | |
1220 | transfer_debug("Closed %s.", t->dest_name); | |
1221 | } | |
1222 | } | |
1223 | ||
1224 | /* | |
832c0e5e | 1225 | * Tries to read data from source into buffer. If buffer is full, |
419f37db IL |
1226 | * no data is read. Returns 0 on success, -1 on error. |
1227 | */ | |
1228 | static int udt_do_read(struct unidirectional_transfer *t) | |
1229 | { | |
1230 | ssize_t bytes; | |
1231 | ||
1232 | if (t->bufuse == BUFFERSIZE) | |
1233 | return 0; /* No space for more. */ | |
1234 | ||
1235 | transfer_debug("%s is readable", t->src_name); | |
1236 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
1237 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1238 | errno != EINTR) { | |
1fee1dce | 1239 | error_errno("read(%s) failed", t->src_name); |
419f37db IL |
1240 | return -1; |
1241 | } else if (bytes == 0) { | |
1242 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
4621085b | 1243 | t->src_name, (int)t->bufuse); |
419f37db IL |
1244 | t->state = SSTATE_FLUSHING; |
1245 | } else if (bytes > 0) { | |
1246 | t->bufuse += bytes; | |
1247 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
1248 | (int)bytes, t->src_name, (int)t->bufuse); | |
1249 | } | |
1250 | return 0; | |
1251 | } | |
1252 | ||
1253 | /* Tries to write data from buffer into destination. If buffer is empty, | |
1254 | * no data is written. Returns 0 on success, -1 on error. | |
1255 | */ | |
1256 | static int udt_do_write(struct unidirectional_transfer *t) | |
1257 | { | |
803dbdb9 | 1258 | ssize_t bytes; |
419f37db IL |
1259 | |
1260 | if (t->bufuse == 0) | |
1261 | return 0; /* Nothing to write. */ | |
1262 | ||
1263 | transfer_debug("%s is writable", t->dest_name); | |
7edc02f4 EFL |
1264 | bytes = xwrite(t->dest, t->buf, t->bufuse); |
1265 | if (bytes < 0 && errno != EWOULDBLOCK) { | |
1fee1dce | 1266 | error_errno("write(%s) failed", t->dest_name); |
419f37db IL |
1267 | return -1; |
1268 | } else if (bytes > 0) { | |
1269 | t->bufuse -= bytes; | |
1270 | if (t->bufuse) | |
1271 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1272 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1273 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1274 | } | |
1275 | return 0; | |
1276 | } | |
1277 | ||
1278 | ||
1279 | /* State of bidirectional transfer loop. */ | |
1280 | struct bidirectional_transfer_state { | |
1281 | /* Direction from program to git. */ | |
1282 | struct unidirectional_transfer ptg; | |
1283 | /* Direction from git to program. */ | |
1284 | struct unidirectional_transfer gtp; | |
1285 | }; | |
1286 | ||
1287 | static void *udt_copy_task_routine(void *udt) | |
1288 | { | |
1289 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1290 | while (t->state != SSTATE_FINISHED) { | |
1291 | if (STATE_NEEDS_READING(t->state)) | |
1292 | if (udt_do_read(t)) | |
1293 | return NULL; | |
1294 | if (STATE_NEEDS_WRITING(t->state)) | |
1295 | if (udt_do_write(t)) | |
1296 | return NULL; | |
1297 | if (STATE_NEEDS_CLOSING(t->state)) | |
1298 | udt_close_if_finished(t); | |
1299 | } | |
1300 | return udt; /* Just some non-NULL value. */ | |
1301 | } | |
1302 | ||
1303 | #ifndef NO_PTHREADS | |
1304 | ||
1305 | /* | |
98e023de | 1306 | * Join thread, with appropriate errors on failure. Name is name for the |
419f37db IL |
1307 | * thread (for error messages). Returns 0 on success, 1 on failure. |
1308 | */ | |
1309 | static int tloop_join(pthread_t thread, const char *name) | |
1310 | { | |
1311 | int err; | |
1312 | void *tret; | |
1313 | err = pthread_join(thread, &tret); | |
1314 | if (!tret) { | |
1315 | error("%s thread failed", name); | |
1316 | return 1; | |
1317 | } | |
1318 | if (err) { | |
1319 | error("%s thread failed to join: %s", name, strerror(err)); | |
1320 | return 1; | |
1321 | } | |
1322 | return 0; | |
1323 | } | |
1324 | ||
1325 | /* | |
1326 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1327 | * -1 on failure. | |
1328 | */ | |
1329 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1330 | { | |
1331 | pthread_t gtp_thread; | |
1332 | pthread_t ptg_thread; | |
1333 | int err; | |
1334 | int ret = 0; | |
1335 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1336 | &s->gtp); | |
1337 | if (err) | |
1338 | die("Can't start thread for copying data: %s", strerror(err)); | |
1339 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, | |
1340 | &s->ptg); | |
1341 | if (err) | |
1342 | die("Can't start thread for copying data: %s", strerror(err)); | |
1343 | ||
1344 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1345 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1346 | return ret; | |
1347 | } | |
1348 | #else | |
1349 | ||
1350 | /* Close the source and target (for writing) for transfer. */ | |
1351 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1352 | { | |
1353 | t->state = SSTATE_FINISHED; | |
1354 | /* | |
1355 | * Socket read end left open isn't a disaster if nobody | |
1356 | * attempts to read from it (mingw compat headers do not | |
1357 | * have SHUT_RD)... | |
1358 | * | |
1359 | * We can't fully close the socket since otherwise gtp | |
1360 | * task would first close the socket it sends data to | |
1361 | * while closing the ptg file descriptors. | |
1362 | */ | |
1363 | if (!t->src_is_sock) | |
1364 | close(t->src); | |
1365 | if (t->dest_is_sock) | |
1366 | shutdown(t->dest, SHUT_WR); | |
1367 | else | |
1368 | close(t->dest); | |
1369 | } | |
1370 | ||
1371 | /* | |
98e023de | 1372 | * Join process, with appropriate errors on failure. Name is name for the |
419f37db IL |
1373 | * process (for error messages). Returns 0 on success, 1 on failure. |
1374 | */ | |
1375 | static int tloop_join(pid_t pid, const char *name) | |
1376 | { | |
1377 | int tret; | |
1378 | if (waitpid(pid, &tret, 0) < 0) { | |
1fee1dce | 1379 | error_errno("%s process failed to wait", name); |
419f37db IL |
1380 | return 1; |
1381 | } | |
1382 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
1383 | error("%s process failed", name); | |
1384 | return 1; | |
1385 | } | |
1386 | return 0; | |
1387 | } | |
1388 | ||
1389 | /* | |
1390 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1391 | * -1 on failure. | |
1392 | */ | |
1393 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1394 | { | |
1395 | pid_t pid1, pid2; | |
1396 | int ret = 0; | |
1397 | ||
1398 | /* Fork thread #1: git to program. */ | |
1399 | pid1 = fork(); | |
1400 | if (pid1 < 0) | |
1401 | die_errno("Can't start thread for copying data"); | |
1402 | else if (pid1 == 0) { | |
1403 | udt_kill_transfer(&s->ptg); | |
1404 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1405 | } | |
1406 | ||
1407 | /* Fork thread #2: program to git. */ | |
1408 | pid2 = fork(); | |
1409 | if (pid2 < 0) | |
1410 | die_errno("Can't start thread for copying data"); | |
1411 | else if (pid2 == 0) { | |
1412 | udt_kill_transfer(&s->gtp); | |
1413 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1414 | } | |
1415 | ||
1416 | /* | |
1417 | * Close both streams in parent as to not interfere with | |
1418 | * end of file detection and wait for both tasks to finish. | |
1419 | */ | |
1420 | udt_kill_transfer(&s->gtp); | |
1421 | udt_kill_transfer(&s->ptg); | |
1422 | ret |= tloop_join(pid1, "Git to program copy"); | |
1423 | ret |= tloop_join(pid2, "Program to git copy"); | |
1424 | return ret; | |
1425 | } | |
1426 | #endif | |
1427 | ||
1428 | /* | |
1429 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1430 | * Additionally filtering through given filter. If filter is NULL, uses | |
1431 | * identity filter. | |
1432 | */ | |
1433 | int bidirectional_transfer_loop(int input, int output) | |
1434 | { | |
1435 | struct bidirectional_transfer_state state; | |
1436 | ||
1437 | /* Fill the state fields. */ | |
1438 | state.ptg.src = input; | |
1439 | state.ptg.dest = 1; | |
1440 | state.ptg.src_is_sock = (input == output); | |
1441 | state.ptg.dest_is_sock = 0; | |
2e3a16b2 | 1442 | state.ptg.state = SSTATE_TRANSFERRING; |
419f37db IL |
1443 | state.ptg.bufuse = 0; |
1444 | state.ptg.src_name = "remote input"; | |
1445 | state.ptg.dest_name = "stdout"; | |
1446 | ||
1447 | state.gtp.src = 0; | |
1448 | state.gtp.dest = output; | |
1449 | state.gtp.src_is_sock = 0; | |
1450 | state.gtp.dest_is_sock = (input == output); | |
2e3a16b2 | 1451 | state.gtp.state = SSTATE_TRANSFERRING; |
419f37db IL |
1452 | state.gtp.bufuse = 0; |
1453 | state.gtp.src_name = "stdin"; | |
1454 | state.gtp.dest_name = "remote output"; | |
1455 | ||
1456 | return tloop_spawnwait_tasks(&state); | |
1457 | } |