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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" |
7851b1e6 | 15 | |
bf3c523c IL |
16 | static int debug; |
17 | ||
9cba13ca | 18 | struct helper_data { |
6eb996b5 DB |
19 | const char *name; |
20 | struct child_process *helper; | |
292ce46b | 21 | FILE *out; |
ef08ef9e | 22 | unsigned fetch : 1, |
a24a32dd | 23 | import : 1, |
bfc366d9 | 24 | bidi_import : 1, |
73b49a75 | 25 | export : 1, |
ae4efe19 | 26 | option : 1, |
fa8c097c IL |
27 | push : 1, |
28 | connect : 1, | |
0d957a4d | 29 | signed_tags : 1, |
9ba38048 | 30 | check_connectivity : 1, |
597b831a MM |
31 | no_disconnect_req : 1, |
32 | no_private_update : 1; | |
a515ebe9 SR |
33 | char *export_marks; |
34 | char *import_marks; | |
72ff8943 DB |
35 | /* These go from remote name (as in "list") to private name */ |
36 | struct refspec *refspecs; | |
37 | int refspec_nr; | |
61b075bd IL |
38 | /* Transport options for fetch-pack/send-pack (should one of |
39 | * those be invoked). | |
40 | */ | |
41 | struct git_transport_options transport_options; | |
6eb996b5 DB |
42 | }; |
43 | ||
bf3c523c IL |
44 | static void sendline(struct helper_data *helper, struct strbuf *buffer) |
45 | { | |
46 | if (debug) | |
47 | fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf); | |
06f46f23 | 48 | if (write_in_full(helper->helper->in, buffer->buf, buffer->len) < 0) |
bf3c523c IL |
49 | die_errno("Full write to remote helper failed"); |
50 | } | |
51 | ||
c096955c | 52 | static int recvline_fh(FILE *helper, struct strbuf *buffer, const char *name) |
bf3c523c IL |
53 | { |
54 | strbuf_reset(buffer); | |
55 | if (debug) | |
56 | fprintf(stderr, "Debug: Remote helper: Waiting...\n"); | |
692dfdfa | 57 | if (strbuf_getline(buffer, helper) == EOF) { |
bf3c523c IL |
58 | if (debug) |
59 | fprintf(stderr, "Debug: Remote helper quit.\n"); | |
5931b33e | 60 | return 1; |
bf3c523c IL |
61 | } |
62 | ||
63 | if (debug) | |
64 | fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf); | |
65 | return 0; | |
66 | } | |
67 | ||
fa8c097c IL |
68 | static int recvline(struct helper_data *helper, struct strbuf *buffer) |
69 | { | |
c096955c | 70 | return recvline_fh(helper->out, buffer, helper->name); |
fa8c097c IL |
71 | } |
72 | ||
bf3c523c IL |
73 | static void write_constant(int fd, const char *str) |
74 | { | |
75 | if (debug) | |
76 | fprintf(stderr, "Debug: Remote helper: -> %s", str); | |
06f46f23 | 77 | if (write_in_full(fd, str, strlen(str)) < 0) |
bf3c523c IL |
78 | die_errno("Full write to remote helper failed"); |
79 | } | |
80 | ||
c2e86add | 81 | static const char *remove_ext_force(const char *url) |
25d5cc48 IL |
82 | { |
83 | if (url) { | |
84 | const char *colon = strchr(url, ':'); | |
85 | if (colon && colon[1] == ':') | |
86 | return colon + 2; | |
87 | } | |
88 | return url; | |
89 | } | |
90 | ||
fa8c097c IL |
91 | static void do_take_over(struct transport *transport) |
92 | { | |
93 | struct helper_data *data; | |
94 | data = (struct helper_data *)transport->data; | |
95 | transport_take_over(transport, data->helper); | |
96 | fclose(data->out); | |
97 | free(data); | |
98 | } | |
99 | ||
2879bc3b MH |
100 | static void standard_options(struct transport *t); |
101 | ||
6eb996b5 DB |
102 | static struct child_process *get_helper(struct transport *transport) |
103 | { | |
104 | struct helper_data *data = transport->data; | |
105 | struct strbuf buf = STRBUF_INIT; | |
106 | struct child_process *helper; | |
72ff8943 DB |
107 | const char **refspecs = NULL; |
108 | int refspec_nr = 0; | |
109 | int refspec_alloc = 0; | |
61b075bd | 110 | int duped; |
6b02de3b | 111 | int code; |
6eb996b5 DB |
112 | |
113 | if (data->helper) | |
114 | return data->helper; | |
115 | ||
483bbd4e RS |
116 | helper = xmalloc(sizeof(*helper)); |
117 | child_process_init(helper); | |
6eb996b5 DB |
118 | helper->in = -1; |
119 | helper->out = -1; | |
120 | helper->err = 0; | |
e0ab2ac6 JK |
121 | argv_array_pushf(&helper->args, "git-remote-%s", data->name); |
122 | argv_array_push(&helper->args, transport->remote->name); | |
123 | argv_array_push(&helper->args, remove_ext_force(transport->url)); | |
6b02de3b IL |
124 | helper->git_cmd = 0; |
125 | helper->silent_exec_failure = 1; | |
e1735872 | 126 | |
4b0c3c77 JN |
127 | if (have_git_dir()) |
128 | argv_array_pushf(&helper->env_array, "%s=%s", | |
129 | GIT_DIR_ENVIRONMENT, get_git_dir()); | |
e1735872 | 130 | |
6b02de3b IL |
131 | code = start_command(helper); |
132 | if (code < 0 && errno == ENOENT) | |
133 | die("Unable to find remote helper for '%s'", data->name); | |
134 | else if (code != 0) | |
135 | exit(code); | |
136 | ||
6eb996b5 | 137 | data->helper = helper; |
fa8c097c | 138 | data->no_disconnect_req = 0; |
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; | |
21a2d4ad | 184 | else if (!data->refspecs && skip_prefix(capname, "refspec ", &arg)) { |
72ff8943 DB |
185 | ALLOC_GROW(refspecs, |
186 | refspec_nr + 1, | |
187 | refspec_alloc); | |
21a2d4ad | 188 | refspecs[refspec_nr++] = xstrdup(arg); |
fa8c097c IL |
189 | } else if (!strcmp(capname, "connect")) { |
190 | data->connect = 1; | |
0d957a4d JK |
191 | } else if (!strcmp(capname, "signed-tags")) { |
192 | data->signed_tags = 1; | |
21a2d4ad JK |
193 | } else if (skip_prefix(capname, "export-marks ", &arg)) { |
194 | data->export_marks = xstrdup(arg); | |
195 | } else if (skip_prefix(capname, "import-marks ", &arg)) { | |
196 | data->import_marks = xstrdup(arg); | |
59556548 | 197 | } else if (starts_with(capname, "no-private-update")) { |
597b831a | 198 | data->no_private_update = 1; |
28ed5b35 | 199 | } else if (mandatory) { |
9517e6b8 | 200 | die("Unknown mandatory capability %s. This remote " |
82247e9b | 201 | "helper probably needs newer version of Git.", |
28ed5b35 | 202 | capname); |
72ff8943 DB |
203 | } |
204 | } | |
205 | if (refspecs) { | |
206 | int i; | |
207 | data->refspec_nr = refspec_nr; | |
208 | data->refspecs = parse_fetch_refspec(refspec_nr, refspecs); | |
b120ef3e | 209 | for (i = 0; i < refspec_nr; i++) |
72ff8943 | 210 | free((char *)refspecs[i]); |
72ff8943 | 211 | free(refspecs); |
a93b4a09 FC |
212 | } else if (data->import || data->bidi_import || data->export) { |
213 | warning("This remote helper should implement refspec capability."); | |
6eb996b5 | 214 | } |
b962dbdc | 215 | strbuf_release(&buf); |
bf3c523c IL |
216 | if (debug) |
217 | fprintf(stderr, "Debug: Capabilities complete.\n"); | |
2879bc3b | 218 | standard_options(transport); |
6eb996b5 DB |
219 | return data->helper; |
220 | } | |
221 | ||
222 | static int disconnect_helper(struct transport *transport) | |
223 | { | |
224 | struct helper_data *data = transport->data; | |
cc567322 | 225 | int res = 0; |
bf3c523c | 226 | |
6eb996b5 | 227 | if (data->helper) { |
bf3c523c IL |
228 | if (debug) |
229 | fprintf(stderr, "Debug: Disconnecting.\n"); | |
fa8c097c | 230 | if (!data->no_disconnect_req) { |
c34fe630 JK |
231 | /* |
232 | * Ignore write errors; there's nothing we can do, | |
233 | * since we're about to close the pipe anyway. And the | |
234 | * most likely error is EPIPE due to the helper dying | |
235 | * to report an error itself. | |
236 | */ | |
237 | sigchain_push(SIGPIPE, SIG_IGN); | |
238 | xwrite(data->helper->in, "\n", 1); | |
239 | sigchain_pop(SIGPIPE); | |
fa8c097c | 240 | } |
6eb996b5 | 241 | close(data->helper->in); |
61b075bd | 242 | close(data->helper->out); |
292ce46b | 243 | fclose(data->out); |
cc567322 | 244 | res = finish_command(data->helper); |
6a83d902 | 245 | FREE_AND_NULL(data->helper); |
6eb996b5 | 246 | } |
cc567322 | 247 | return res; |
6eb996b5 DB |
248 | } |
249 | ||
ef08ef9e SP |
250 | static const char *unsupported_options[] = { |
251 | TRANS_OPT_UPLOADPACK, | |
252 | TRANS_OPT_RECEIVEPACK, | |
253 | TRANS_OPT_THIN, | |
254 | TRANS_OPT_KEEP | |
255 | }; | |
23cd01ec | 256 | |
ef08ef9e SP |
257 | static const char *boolean_options[] = { |
258 | TRANS_OPT_THIN, | |
259 | TRANS_OPT_KEEP, | |
0ea47f9d | 260 | TRANS_OPT_FOLLOWTAGS, |
cccf74e2 | 261 | TRANS_OPT_DEEPEN_RELATIVE |
ef08ef9e SP |
262 | }; |
263 | ||
9318c5dd NTND |
264 | static int strbuf_set_helper_option(struct helper_data *data, |
265 | struct strbuf *buf) | |
266 | { | |
267 | int ret; | |
268 | ||
269 | sendline(data, buf); | |
270 | if (recvline(data, buf)) | |
271 | exit(128); | |
272 | ||
273 | if (!strcmp(buf->buf, "ok")) | |
274 | ret = 0; | |
275 | else if (starts_with(buf->buf, "error")) | |
276 | ret = -1; | |
277 | else if (!strcmp(buf->buf, "unsupported")) | |
278 | ret = 1; | |
279 | else { | |
280 | warning("%s unexpectedly said: '%s'", data->name, buf->buf); | |
281 | ret = 1; | |
282 | } | |
283 | return ret; | |
284 | } | |
285 | ||
a45a2600 NTND |
286 | static int string_list_set_helper_option(struct helper_data *data, |
287 | const char *name, | |
288 | struct string_list *list) | |
289 | { | |
290 | struct strbuf buf = STRBUF_INIT; | |
291 | int i, ret = 0; | |
292 | ||
293 | for (i = 0; i < list->nr; i++) { | |
294 | strbuf_addf(&buf, "option %s ", name); | |
295 | quote_c_style(list->items[i].string, &buf, NULL, 0); | |
296 | strbuf_addch(&buf, '\n'); | |
297 | ||
298 | if ((ret = strbuf_set_helper_option(data, &buf))) | |
299 | break; | |
300 | strbuf_reset(&buf); | |
301 | } | |
302 | strbuf_release(&buf); | |
303 | return ret; | |
304 | } | |
305 | ||
ef08ef9e SP |
306 | static int set_helper_option(struct transport *transport, |
307 | const char *name, const char *value) | |
308 | { | |
309 | struct helper_data *data = transport->data; | |
ef08ef9e SP |
310 | struct strbuf buf = STRBUF_INIT; |
311 | int i, ret, is_bool = 0; | |
312 | ||
bf3c523c IL |
313 | get_helper(transport); |
314 | ||
ef08ef9e SP |
315 | if (!data->option) |
316 | return 1; | |
317 | ||
a45a2600 NTND |
318 | if (!strcmp(name, "deepen-not")) |
319 | return string_list_set_helper_option(data, name, | |
320 | (struct string_list *)value); | |
321 | ||
ef08ef9e SP |
322 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { |
323 | if (!strcmp(name, unsupported_options[i])) | |
324 | return 1; | |
325 | } | |
326 | ||
327 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
328 | if (!strcmp(name, boolean_options[i])) { | |
329 | is_bool = 1; | |
330 | break; | |
331 | } | |
332 | } | |
333 | ||
334 | strbuf_addf(&buf, "option %s ", name); | |
335 | if (is_bool) | |
336 | strbuf_addstr(&buf, value ? "true" : "false"); | |
337 | else | |
338 | quote_c_style(value, &buf, NULL, 0); | |
339 | strbuf_addch(&buf, '\n'); | |
340 | ||
9318c5dd | 341 | ret = strbuf_set_helper_option(data, &buf); |
ef08ef9e SP |
342 | strbuf_release(&buf); |
343 | return ret; | |
344 | } | |
345 | ||
346 | static void standard_options(struct transport *t) | |
347 | { | |
348 | char buf[16]; | |
ef08ef9e | 349 | int v = t->verbose; |
ef08ef9e | 350 | |
d01b3c02 | 351 | set_helper_option(t, "progress", t->progress ? "true" : "false"); |
ef08ef9e | 352 | |
8c5acfb9 | 353 | xsnprintf(buf, sizeof(buf), "%d", v + 1); |
ef08ef9e | 354 | set_helper_option(t, "verbosity", buf); |
c915f11e EW |
355 | |
356 | switch (t->family) { | |
357 | case TRANSPORT_FAMILY_ALL: | |
358 | /* | |
359 | * this is already the default, | |
360 | * do not break old remote helpers by setting "all" here | |
361 | */ | |
362 | break; | |
363 | case TRANSPORT_FAMILY_IPV4: | |
364 | set_helper_option(t, "family", "ipv4"); | |
365 | break; | |
366 | case TRANSPORT_FAMILY_IPV6: | |
367 | set_helper_option(t, "family", "ipv6"); | |
368 | break; | |
369 | } | |
ef08ef9e SP |
370 | } |
371 | ||
f2a37151 DB |
372 | static int release_helper(struct transport *transport) |
373 | { | |
cc567322 | 374 | int res = 0; |
72ff8943 DB |
375 | struct helper_data *data = transport->data; |
376 | free_refspec(data->refspec_nr, data->refspecs); | |
377 | data->refspecs = NULL; | |
cc567322 | 378 | res = disconnect_helper(transport); |
f2a37151 | 379 | free(transport->data); |
cc567322 | 380 | return res; |
f2a37151 DB |
381 | } |
382 | ||
6eb996b5 | 383 | static int fetch_with_fetch(struct transport *transport, |
37148311 | 384 | int nr_heads, struct ref **to_fetch) |
6eb996b5 | 385 | { |
292ce46b | 386 | struct helper_data *data = transport->data; |
6eb996b5 DB |
387 | int i; |
388 | struct strbuf buf = STRBUF_INIT; | |
389 | ||
390 | for (i = 0; i < nr_heads; i++) { | |
1088261f | 391 | const struct ref *posn = to_fetch[i]; |
6eb996b5 DB |
392 | if (posn->status & REF_STATUS_UPTODATE) |
393 | continue; | |
2d14d65c DB |
394 | |
395 | strbuf_addf(&buf, "fetch %s %s\n", | |
f4e54d02 | 396 | oid_to_hex(&posn->old_oid), |
33cae542 | 397 | posn->symref ? posn->symref : posn->name); |
292ce46b | 398 | } |
2d14d65c | 399 | |
292ce46b | 400 | strbuf_addch(&buf, '\n'); |
bf3c523c | 401 | sendline(data, &buf); |
292ce46b SP |
402 | |
403 | while (1) { | |
5931b33e FC |
404 | if (recvline(data, &buf)) |
405 | exit(128); | |
292ce46b | 406 | |
59556548 | 407 | if (starts_with(buf.buf, "lock ")) { |
292ce46b SP |
408 | const char *name = buf.buf + 5; |
409 | if (transport->pack_lockfile) | |
410 | warning("%s also locked %s", data->name, name); | |
411 | else | |
412 | transport->pack_lockfile = xstrdup(name); | |
413 | } | |
9ba38048 NTND |
414 | else if (data->check_connectivity && |
415 | data->transport_options.check_self_contained_and_connected && | |
416 | !strcmp(buf.buf, "connectivity-ok")) | |
417 | data->transport_options.self_contained_and_connected = 1; | |
292ce46b SP |
418 | else if (!buf.len) |
419 | break; | |
420 | else | |
421 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
6eb996b5 | 422 | } |
292ce46b | 423 | strbuf_release(&buf); |
6eb996b5 DB |
424 | return 0; |
425 | } | |
426 | ||
e65e91ed DB |
427 | static int get_importer(struct transport *transport, struct child_process *fastimport) |
428 | { | |
429 | struct child_process *helper = get_helper(transport); | |
bfc366d9 | 430 | struct helper_data *data = transport->data; |
bfc366d9 | 431 | int cat_blob_fd, code; |
483bbd4e | 432 | child_process_init(fastimport); |
e65e91ed | 433 | fastimport->in = helper->out; |
173fd1a1 JK |
434 | argv_array_push(&fastimport->args, "fast-import"); |
435 | argv_array_push(&fastimport->args, debug ? "--stats" : "--quiet"); | |
e65e91ed | 436 | |
bfc366d9 FA |
437 | if (data->bidi_import) { |
438 | cat_blob_fd = xdup(helper->in); | |
173fd1a1 | 439 | argv_array_pushf(&fastimport->args, "--cat-blob-fd=%d", cat_blob_fd); |
bfc366d9 | 440 | } |
e65e91ed | 441 | fastimport->git_cmd = 1; |
bfc366d9 FA |
442 | |
443 | code = start_command(fastimport); | |
444 | return code; | |
e65e91ed DB |
445 | } |
446 | ||
73b49a75 SR |
447 | static int get_exporter(struct transport *transport, |
448 | struct child_process *fastexport, | |
73b49a75 SR |
449 | struct string_list *revlist_args) |
450 | { | |
a515ebe9 | 451 | struct helper_data *data = transport->data; |
73b49a75 | 452 | struct child_process *helper = get_helper(transport); |
2aeae40a | 453 | int i; |
852e54bc | 454 | |
8828f298 | 455 | child_process_init(fastexport); |
73b49a75 SR |
456 | |
457 | /* we need to duplicate helper->in because we want to use it after | |
458 | * fastexport is done with it. */ | |
459 | fastexport->out = dup(helper->in); | |
2aeae40a JK |
460 | argv_array_push(&fastexport->args, "fast-export"); |
461 | argv_array_push(&fastexport->args, "--use-done-feature"); | |
462 | argv_array_push(&fastexport->args, data->signed_tags ? | |
463 | "--signed-tags=verbatim" : "--signed-tags=warn-strip"); | |
464 | if (data->export_marks) | |
465 | argv_array_pushf(&fastexport->args, "--export-marks=%s.tmp", data->export_marks); | |
466 | if (data->import_marks) | |
467 | argv_array_pushf(&fastexport->args, "--import-marks=%s", data->import_marks); | |
73b49a75 SR |
468 | |
469 | for (i = 0; i < revlist_args->nr; i++) | |
2aeae40a | 470 | argv_array_push(&fastexport->args, revlist_args->items[i].string); |
73b49a75 SR |
471 | |
472 | fastexport->git_cmd = 1; | |
473 | return start_command(fastexport); | |
474 | } | |
475 | ||
e65e91ed DB |
476 | static int fetch_with_import(struct transport *transport, |
477 | int nr_heads, struct ref **to_fetch) | |
478 | { | |
479 | struct child_process fastimport; | |
72ff8943 | 480 | struct helper_data *data = transport->data; |
e65e91ed DB |
481 | int i; |
482 | struct ref *posn; | |
483 | struct strbuf buf = STRBUF_INIT; | |
484 | ||
bf3c523c IL |
485 | get_helper(transport); |
486 | ||
e65e91ed DB |
487 | if (get_importer(transport, &fastimport)) |
488 | die("Couldn't run fast-import"); | |
489 | ||
490 | for (i = 0; i < nr_heads; i++) { | |
491 | posn = to_fetch[i]; | |
492 | if (posn->status & REF_STATUS_UPTODATE) | |
493 | continue; | |
494 | ||
33cae542 MH |
495 | strbuf_addf(&buf, "import %s\n", |
496 | posn->symref ? posn->symref : posn->name); | |
bf3c523c | 497 | sendline(data, &buf); |
e65e91ed DB |
498 | strbuf_reset(&buf); |
499 | } | |
9504bc9d SR |
500 | |
501 | write_constant(data->helper->in, "\n"); | |
bfc366d9 FA |
502 | /* |
503 | * remote-helpers that advertise the bidi-import capability are required to | |
504 | * buffer the complete batch of import commands until this newline before | |
505 | * sending data to fast-import. | |
506 | * These helpers read back data from fast-import on their stdin, which could | |
507 | * be mixed with import commands, otherwise. | |
508 | */ | |
9504bc9d | 509 | |
cc567322 SR |
510 | if (finish_command(&fastimport)) |
511 | die("Error while running fast-import"); | |
e65e91ed | 512 | |
dff9d65d FA |
513 | /* |
514 | * The fast-import stream of a remote helper that advertises | |
515 | * the "refspec" capability writes to the refs named after the | |
516 | * right hand side of the first refspec matching each ref we | |
517 | * were fetching. | |
518 | * | |
519 | * (If no "refspec" capability was specified, for historical | |
7a43c554 | 520 | * reasons we default to the equivalent of *:*.) |
dff9d65d FA |
521 | * |
522 | * Store the result in to_fetch[i].old_sha1. Callers such | |
523 | * as "git fetch" can use the value to write feedback to the | |
524 | * terminal, populate FETCH_HEAD, and determine what new value | |
525 | * should be written to peer_ref if the update is a | |
526 | * fast-forward or this is a forced update. | |
527 | */ | |
e65e91ed | 528 | for (i = 0; i < nr_heads; i++) { |
33cae542 | 529 | char *private, *name; |
e65e91ed DB |
530 | posn = to_fetch[i]; |
531 | if (posn->status & REF_STATUS_UPTODATE) | |
532 | continue; | |
33cae542 | 533 | name = posn->symref ? posn->symref : posn->name; |
72ff8943 | 534 | if (data->refspecs) |
33cae542 | 535 | private = apply_refspecs(data->refspecs, data->refspec_nr, name); |
72ff8943 | 536 | else |
33cae542 | 537 | private = xstrdup(name); |
d51b720f | 538 | if (private) { |
34c290a6 | 539 | if (read_ref(private, &posn->old_oid) < 0) |
ae25fd39 | 540 | die("Could not read ref %s", private); |
d51b720f MH |
541 | free(private); |
542 | } | |
e65e91ed | 543 | } |
b962dbdc | 544 | strbuf_release(&buf); |
e65e91ed DB |
545 | return 0; |
546 | } | |
547 | ||
fa8c097c IL |
548 | static int process_connect_service(struct transport *transport, |
549 | const char *name, const char *exec) | |
550 | { | |
551 | struct helper_data *data = transport->data; | |
552 | struct strbuf cmdbuf = STRBUF_INIT; | |
553 | struct child_process *helper; | |
554 | int r, duped, ret = 0; | |
555 | FILE *input; | |
556 | ||
557 | helper = get_helper(transport); | |
558 | ||
559 | /* | |
560 | * Yes, dup the pipe another time, as we need unbuffered version | |
561 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
562 | * stream buffering only can be changed before first I/O operation | |
563 | * on it. | |
564 | */ | |
565 | duped = dup(helper->out); | |
566 | if (duped < 0) | |
567 | die_errno("Can't dup helper output fd"); | |
568 | input = xfdopen(duped, "r"); | |
569 | setvbuf(input, NULL, _IONBF, 0); | |
570 | ||
571 | /* | |
572 | * Handle --upload-pack and friends. This is fire and forget... | |
573 | * just warn if it fails. | |
574 | */ | |
575 | if (strcmp(name, exec)) { | |
576 | r = set_helper_option(transport, "servpath", exec); | |
577 | if (r > 0) | |
578 | warning("Setting remote service path not supported by protocol."); | |
579 | else if (r < 0) | |
580 | warning("Invalid remote service path."); | |
581 | } | |
582 | ||
583 | if (data->connect) | |
584 | strbuf_addf(&cmdbuf, "connect %s\n", name); | |
585 | else | |
586 | goto exit; | |
587 | ||
588 | sendline(data, &cmdbuf); | |
5931b33e FC |
589 | if (recvline_fh(input, &cmdbuf, name)) |
590 | exit(128); | |
591 | ||
fa8c097c IL |
592 | if (!strcmp(cmdbuf.buf, "")) { |
593 | data->no_disconnect_req = 1; | |
594 | if (debug) | |
595 | fprintf(stderr, "Debug: Smart transport connection " | |
596 | "ready.\n"); | |
597 | ret = 1; | |
598 | } else if (!strcmp(cmdbuf.buf, "fallback")) { | |
599 | if (debug) | |
600 | fprintf(stderr, "Debug: Falling back to dumb " | |
601 | "transport.\n"); | |
602 | } else | |
603 | die("Unknown response to connect: %s", | |
604 | cmdbuf.buf); | |
605 | ||
606 | exit: | |
4168be8e | 607 | strbuf_release(&cmdbuf); |
fa8c097c IL |
608 | fclose(input); |
609 | return ret; | |
610 | } | |
611 | ||
612 | static int process_connect(struct transport *transport, | |
613 | int for_push) | |
614 | { | |
615 | struct helper_data *data = transport->data; | |
616 | const char *name; | |
617 | const char *exec; | |
618 | ||
619 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
620 | if (for_push) | |
621 | exec = data->transport_options.receivepack; | |
622 | else | |
623 | exec = data->transport_options.uploadpack; | |
624 | ||
625 | return process_connect_service(transport, name, exec); | |
626 | } | |
627 | ||
b236752a IL |
628 | static int connect_helper(struct transport *transport, const char *name, |
629 | const char *exec, int fd[2]) | |
630 | { | |
631 | struct helper_data *data = transport->data; | |
632 | ||
633 | /* Get_helper so connect is inited. */ | |
634 | get_helper(transport); | |
635 | if (!data->connect) | |
636 | die("Operation not supported by protocol."); | |
637 | ||
638 | if (!process_connect_service(transport, name, exec)) | |
639 | die("Can't connect to subservice %s.", name); | |
640 | ||
641 | fd[0] = data->helper->out; | |
642 | fd[1] = data->helper->in; | |
643 | return 0; | |
644 | } | |
645 | ||
6eb996b5 | 646 | static int fetch(struct transport *transport, |
37148311 | 647 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
648 | { |
649 | struct helper_data *data = transport->data; | |
650 | int i, count; | |
651 | ||
fa8c097c IL |
652 | if (process_connect(transport, 0)) { |
653 | do_take_over(transport); | |
e967ca38 | 654 | return transport->vtable->fetch(transport, nr_heads, to_fetch); |
fa8c097c IL |
655 | } |
656 | ||
6eb996b5 DB |
657 | count = 0; |
658 | for (i = 0; i < nr_heads; i++) | |
659 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
660 | count++; | |
661 | ||
662 | if (!count) | |
663 | return 0; | |
664 | ||
aab1beb0 MH |
665 | if (data->check_connectivity && |
666 | data->transport_options.check_self_contained_and_connected) | |
667 | set_helper_option(transport, "check-connectivity", "true"); | |
668 | ||
669 | if (transport->cloning) | |
670 | set_helper_option(transport, "cloning", "true"); | |
671 | ||
672 | if (data->transport_options.update_shallow) | |
673 | set_helper_option(transport, "update-shallow", "true"); | |
674 | ||
6eb996b5 DB |
675 | if (data->fetch) |
676 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
677 | ||
e65e91ed DB |
678 | if (data->import) |
679 | return fetch_with_import(transport, nr_heads, to_fetch); | |
680 | ||
6eb996b5 DB |
681 | return -1; |
682 | } | |
683 | ||
664059fb | 684 | static int push_update_ref_status(struct strbuf *buf, |
d2e73c6f SR |
685 | struct ref **ref, |
686 | struct ref *remote_refs) | |
687 | { | |
688 | char *refname, *msg; | |
f9e3c6be | 689 | int status, forced = 0; |
d2e73c6f | 690 | |
59556548 | 691 | if (starts_with(buf->buf, "ok ")) { |
d2e73c6f SR |
692 | status = REF_STATUS_OK; |
693 | refname = buf->buf + 3; | |
59556548 | 694 | } else if (starts_with(buf->buf, "error ")) { |
d2e73c6f SR |
695 | status = REF_STATUS_REMOTE_REJECT; |
696 | refname = buf->buf + 6; | |
697 | } else | |
82247e9b | 698 | die("expected ok/error, helper said '%s'", buf->buf); |
d2e73c6f SR |
699 | |
700 | msg = strchr(refname, ' '); | |
701 | if (msg) { | |
702 | struct strbuf msg_buf = STRBUF_INIT; | |
703 | const char *end; | |
704 | ||
705 | *msg++ = '\0'; | |
706 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
707 | msg = strbuf_detach(&msg_buf, NULL); | |
708 | else | |
709 | msg = xstrdup(msg); | |
710 | strbuf_release(&msg_buf); | |
711 | ||
712 | if (!strcmp(msg, "no match")) { | |
713 | status = REF_STATUS_NONE; | |
6a83d902 | 714 | FREE_AND_NULL(msg); |
d2e73c6f SR |
715 | } |
716 | else if (!strcmp(msg, "up to date")) { | |
717 | status = REF_STATUS_UPTODATE; | |
6a83d902 | 718 | FREE_AND_NULL(msg); |
d2e73c6f SR |
719 | } |
720 | else if (!strcmp(msg, "non-fast forward")) { | |
721 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
6a83d902 | 722 | FREE_AND_NULL(msg); |
d2e73c6f | 723 | } |
dbfeddb1 CR |
724 | else if (!strcmp(msg, "already exists")) { |
725 | status = REF_STATUS_REJECT_ALREADY_EXISTS; | |
6a83d902 | 726 | FREE_AND_NULL(msg); |
dbfeddb1 | 727 | } |
75e5c0dc JH |
728 | else if (!strcmp(msg, "fetch first")) { |
729 | status = REF_STATUS_REJECT_FETCH_FIRST; | |
6a83d902 | 730 | FREE_AND_NULL(msg); |
75e5c0dc JH |
731 | } |
732 | else if (!strcmp(msg, "needs force")) { | |
733 | status = REF_STATUS_REJECT_NEEDS_FORCE; | |
6a83d902 | 734 | FREE_AND_NULL(msg); |
75e5c0dc | 735 | } |
631b5ef2 JH |
736 | else if (!strcmp(msg, "stale info")) { |
737 | status = REF_STATUS_REJECT_STALE; | |
6a83d902 | 738 | FREE_AND_NULL(msg); |
631b5ef2 | 739 | } |
f9e3c6be FC |
740 | else if (!strcmp(msg, "forced update")) { |
741 | forced = 1; | |
6a83d902 | 742 | FREE_AND_NULL(msg); |
f9e3c6be | 743 | } |
d2e73c6f SR |
744 | } |
745 | ||
746 | if (*ref) | |
747 | *ref = find_ref_by_name(*ref, refname); | |
748 | if (!*ref) | |
749 | *ref = find_ref_by_name(remote_refs, refname); | |
750 | if (!*ref) { | |
751 | warning("helper reported unexpected status of %s", refname); | |
664059fb | 752 | return 1; |
d2e73c6f SR |
753 | } |
754 | ||
755 | if ((*ref)->status != REF_STATUS_NONE) { | |
756 | /* | |
757 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
758 | * status reported by the remote helper if the latter is 'no match'. | |
759 | */ | |
760 | if (status == REF_STATUS_NONE) | |
664059fb | 761 | return 1; |
d2e73c6f SR |
762 | } |
763 | ||
764 | (*ref)->status = status; | |
cf31f70c | 765 | (*ref)->forced_update |= forced; |
d2e73c6f | 766 | (*ref)->remote_status = msg; |
126aac5c | 767 | return !(status == REF_STATUS_OK); |
d2e73c6f SR |
768 | } |
769 | ||
0551a06c | 770 | static int push_update_refs_status(struct helper_data *data, |
5a75353f FC |
771 | struct ref *remote_refs, |
772 | int flags) | |
d2e73c6f SR |
773 | { |
774 | struct strbuf buf = STRBUF_INIT; | |
775 | struct ref *ref = remote_refs; | |
0551a06c FC |
776 | int ret = 0; |
777 | ||
d2e73c6f | 778 | for (;;) { |
664059fb FC |
779 | char *private; |
780 | ||
0551a06c FC |
781 | if (recvline(data, &buf)) { |
782 | ret = 1; | |
783 | break; | |
784 | } | |
785 | ||
d2e73c6f SR |
786 | if (!buf.len) |
787 | break; | |
788 | ||
664059fb FC |
789 | if (push_update_ref_status(&buf, &ref, remote_refs)) |
790 | continue; | |
791 | ||
5a75353f | 792 | if (flags & TRANSPORT_PUSH_DRY_RUN || !data->refspecs || data->no_private_update) |
664059fb FC |
793 | continue; |
794 | ||
795 | /* propagate back the update to the remote namespace */ | |
796 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); | |
797 | if (!private) | |
798 | continue; | |
ae077771 | 799 | update_ref("update by helper", private, &ref->new_oid, NULL, |
800 | 0, 0); | |
664059fb | 801 | free(private); |
d2e73c6f SR |
802 | } |
803 | strbuf_release(&buf); | |
0551a06c | 804 | return ret; |
d2e73c6f SR |
805 | } |
806 | ||
30261094 DB |
807 | static void set_common_push_options(struct transport *transport, |
808 | const char *name, int flags) | |
809 | { | |
810 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
811 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
812 | die("helper %s does not support dry-run", name); | |
813 | } else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) { | |
814 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0) | |
815 | die("helper %s does not support --signed", name); | |
816 | } else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) { | |
817 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0) | |
818 | die("helper %s does not support --signed=if-asked", name); | |
819 | } | |
438fc684 SB |
820 | |
821 | if (flags & TRANSPORT_PUSH_OPTIONS) { | |
822 | struct string_list_item *item; | |
823 | for_each_string_list_item(item, transport->push_options) | |
824 | if (set_helper_option(transport, "push-option", item->string) != 0) | |
825 | die("helper %s does not support 'push-option'", name); | |
826 | } | |
30261094 DB |
827 | } |
828 | ||
73b49a75 | 829 | static int push_refs_with_push(struct transport *transport, |
05c1eb10 | 830 | struct ref *remote_refs, int flags) |
ae4efe19 SP |
831 | { |
832 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
833 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
834 | struct helper_data *data = transport->data; | |
835 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 | 836 | struct ref *ref; |
05c1eb10 JH |
837 | struct string_list cas_options = STRING_LIST_INIT_DUP; |
838 | struct string_list_item *cas_option; | |
ae4efe19 | 839 | |
c0aa335c | 840 | get_helper(transport); |
ae4efe19 SP |
841 | if (!data->push) |
842 | return 1; | |
843 | ||
844 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 845 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
846 | continue; |
847 | ||
20e8b465 TRC |
848 | /* Check for statuses set by set_ref_status_for_push() */ |
849 | switch (ref->status) { | |
850 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
631b5ef2 | 851 | case REF_STATUS_REJECT_STALE: |
dbfeddb1 | 852 | case REF_STATUS_REJECT_ALREADY_EXISTS: |
20e8b465 | 853 | case REF_STATUS_UPTODATE: |
ae4efe19 | 854 | continue; |
20e8b465 TRC |
855 | default: |
856 | ; /* do nothing */ | |
ae4efe19 SP |
857 | } |
858 | ||
859 | if (force_all) | |
860 | ref->force = 1; | |
861 | ||
862 | strbuf_addstr(&buf, "push "); | |
863 | if (!ref->deletion) { | |
864 | if (ref->force) | |
865 | strbuf_addch(&buf, '+'); | |
866 | if (ref->peer_ref) | |
867 | strbuf_addstr(&buf, ref->peer_ref->name); | |
868 | else | |
f4e54d02 | 869 | strbuf_addstr(&buf, oid_to_hex(&ref->new_oid)); |
ae4efe19 SP |
870 | } |
871 | strbuf_addch(&buf, ':'); | |
872 | strbuf_addstr(&buf, ref->name); | |
873 | strbuf_addch(&buf, '\n'); | |
05c1eb10 JH |
874 | |
875 | /* | |
876 | * The "--force-with-lease" options without explicit | |
877 | * values to expect have already been expanded into | |
f4e54d02 | 878 | * the ref->old_oid_expect[] field; we can ignore |
05c1eb10 JH |
879 | * transport->smart_options->cas altogether and instead |
880 | * can enumerate them from the refs. | |
881 | */ | |
882 | if (ref->expect_old_sha1) { | |
883 | struct strbuf cas = STRBUF_INIT; | |
884 | strbuf_addf(&cas, "%s:%s", | |
f4e54d02 | 885 | ref->name, oid_to_hex(&ref->old_oid_expect)); |
176cb979 RS |
886 | string_list_append_nodup(&cas_options, |
887 | strbuf_detach(&cas, NULL)); | |
05c1eb10 | 888 | } |
ae4efe19 | 889 | } |
05c1eb10 JH |
890 | if (buf.len == 0) { |
891 | string_list_clear(&cas_options, 0); | |
d8f67d20 | 892 | return 0; |
05c1eb10 | 893 | } |
ae4efe19 | 894 | |
05c1eb10 JH |
895 | for_each_string_list_item(cas_option, &cas_options) |
896 | set_helper_option(transport, "cas", cas_option->string); | |
30261094 | 897 | set_common_push_options(transport, data->name, flags); |
ae4efe19 SP |
898 | |
899 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 900 | sendline(data, &buf); |
ae4efe19 | 901 | strbuf_release(&buf); |
176cb979 | 902 | string_list_clear(&cas_options, 0); |
d2e73c6f | 903 | |
0551a06c | 904 | return push_update_refs_status(data, remote_refs, flags); |
ae4efe19 SP |
905 | } |
906 | ||
73b49a75 SR |
907 | static int push_refs_with_export(struct transport *transport, |
908 | struct ref *remote_refs, int flags) | |
909 | { | |
910 | struct ref *ref; | |
911 | struct child_process *helper, exporter; | |
912 | struct helper_data *data = transport->data; | |
d98c8153 | 913 | struct string_list revlist_args = STRING_LIST_INIT_DUP; |
73b49a75 SR |
914 | struct strbuf buf = STRBUF_INIT; |
915 | ||
21610d82 FC |
916 | if (!data->refspecs) |
917 | die("remote-helper doesn't support push; refspec needed"); | |
918 | ||
30261094 | 919 | set_common_push_options(transport, data->name, flags); |
510fa6f5 FC |
920 | if (flags & TRANSPORT_PUSH_FORCE) { |
921 | if (set_helper_option(transport, "force", "true") != 0) | |
922 | warning("helper %s does not support 'force'", data->name); | |
923 | } | |
924 | ||
73b49a75 SR |
925 | helper = get_helper(transport); |
926 | ||
927 | write_constant(helper->in, "export\n"); | |
928 | ||
73b49a75 SR |
929 | for (ref = remote_refs; ref; ref = ref->next) { |
930 | char *private; | |
27912a03 | 931 | struct object_id oid; |
73b49a75 | 932 | |
73b49a75 | 933 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); |
e82caf38 | 934 | if (private && !get_oid(private, &oid)) { |
73b49a75 | 935 | strbuf_addf(&buf, "^%s", private); |
176cb979 RS |
936 | string_list_append_nodup(&revlist_args, |
937 | strbuf_detach(&buf, NULL)); | |
27912a03 | 938 | oidcpy(&ref->old_oid, &oid); |
73b49a75 | 939 | } |
2faa1527 | 940 | free(private); |
73b49a75 | 941 | |
67c9c782 | 942 | if (ref->peer_ref) { |
d98c8153 | 943 | if (strcmp(ref->name, ref->peer_ref->name)) { |
f3d03763 FC |
944 | if (!ref->deletion) { |
945 | const char *name; | |
946 | int flag; | |
947 | ||
948 | /* Follow symbolic refs (mainly for HEAD). */ | |
49e61479 | 949 | name = resolve_ref_unsafe(ref->peer_ref->name, |
950 | RESOLVE_REF_READING, | |
951 | &oid, &flag); | |
f3d03763 FC |
952 | if (!name || !(flag & REF_ISSYMREF)) |
953 | name = ref->peer_ref->name; | |
9193f742 | 954 | |
f3d03763 FC |
955 | strbuf_addf(&buf, "%s:%s", name, ref->name); |
956 | } else | |
957 | strbuf_addf(&buf, ":%s", ref->name); | |
9193f742 | 958 | |
d98c8153 FC |
959 | string_list_append(&revlist_args, "--refspec"); |
960 | string_list_append(&revlist_args, buf.buf); | |
961 | strbuf_release(&buf); | |
962 | } | |
f3d03763 FC |
963 | if (!ref->deletion) |
964 | string_list_append(&revlist_args, ref->peer_ref->name); | |
67c9c782 | 965 | } |
73b49a75 SR |
966 | } |
967 | ||
a515ebe9 | 968 | if (get_exporter(transport, &exporter, &revlist_args)) |
73b49a75 SR |
969 | die("Couldn't run fast-export"); |
970 | ||
d98c8153 FC |
971 | string_list_clear(&revlist_args, 1); |
972 | ||
cc567322 SR |
973 | if (finish_command(&exporter)) |
974 | die("Error while running fast-export"); | |
3994e64d FC |
975 | if (push_update_refs_status(data, remote_refs, flags)) |
976 | return 1; | |
977 | ||
978 | if (data->export_marks) { | |
979 | strbuf_addf(&buf, "%s.tmp", data->export_marks); | |
980 | rename(buf.buf, data->export_marks); | |
981 | strbuf_release(&buf); | |
982 | } | |
983 | ||
984 | return 0; | |
73b49a75 SR |
985 | } |
986 | ||
987 | static int push_refs(struct transport *transport, | |
988 | struct ref *remote_refs, int flags) | |
989 | { | |
990 | struct helper_data *data = transport->data; | |
991 | ||
992 | if (process_connect(transport, 1)) { | |
993 | do_take_over(transport); | |
e967ca38 | 994 | return transport->vtable->push_refs(transport, remote_refs, flags); |
73b49a75 SR |
995 | } |
996 | ||
997 | if (!remote_refs) { | |
998 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
999 | "Perhaps you should specify a branch such as 'master'.\n"); | |
1000 | return 0; | |
1001 | } | |
1002 | ||
1003 | if (data->push) | |
1004 | return push_refs_with_push(transport, remote_refs, flags); | |
1005 | ||
1006 | if (data->export) | |
1007 | return push_refs_with_export(transport, remote_refs, flags); | |
1008 | ||
1009 | return -1; | |
1010 | } | |
1011 | ||
1012 | ||
f8ec9167 DB |
1013 | static int has_attribute(const char *attrs, const char *attr) { |
1014 | int len; | |
1015 | if (!attrs) | |
1016 | return 0; | |
1017 | ||
1018 | len = strlen(attr); | |
1019 | for (;;) { | |
1020 | const char *space = strchrnul(attrs, ' '); | |
1021 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
1022 | return 1; | |
1023 | if (!*space) | |
1024 | return 0; | |
1025 | attrs = space + 1; | |
1026 | } | |
1027 | } | |
1028 | ||
6eb996b5 DB |
1029 | static struct ref *get_refs_list(struct transport *transport, int for_push) |
1030 | { | |
292ce46b | 1031 | struct helper_data *data = transport->data; |
6eb996b5 DB |
1032 | struct child_process *helper; |
1033 | struct ref *ret = NULL; | |
1034 | struct ref **tail = &ret; | |
1035 | struct ref *posn; | |
1036 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
1037 | |
1038 | helper = get_helper(transport); | |
2d14d65c | 1039 | |
fa8c097c IL |
1040 | if (process_connect(transport, for_push)) { |
1041 | do_take_over(transport); | |
e967ca38 | 1042 | return transport->vtable->get_refs_list(transport, for_push); |
fa8c097c IL |
1043 | } |
1044 | ||
ae4efe19 SP |
1045 | if (data->push && for_push) |
1046 | write_str_in_full(helper->in, "list for-push\n"); | |
1047 | else | |
1048 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 1049 | |
6eb996b5 DB |
1050 | while (1) { |
1051 | char *eov, *eon; | |
5931b33e FC |
1052 | if (recvline(data, &buf)) |
1053 | exit(128); | |
6eb996b5 DB |
1054 | |
1055 | if (!*buf.buf) | |
1056 | break; | |
1057 | ||
1058 | eov = strchr(buf.buf, ' '); | |
1059 | if (!eov) | |
1060 | die("Malformed response in ref list: %s", buf.buf); | |
1061 | eon = strchr(eov + 1, ' '); | |
1062 | *eov = '\0'; | |
1063 | if (eon) | |
1064 | *eon = '\0'; | |
1065 | *tail = alloc_ref(eov + 1); | |
1066 | if (buf.buf[0] == '@') | |
1067 | (*tail)->symref = xstrdup(buf.buf + 1); | |
1068 | else if (buf.buf[0] != '?') | |
f4e54d02 | 1069 | get_oid_hex(buf.buf, &(*tail)->old_oid); |
f8ec9167 DB |
1070 | if (eon) { |
1071 | if (has_attribute(eon + 1, "unchanged")) { | |
1072 | (*tail)->status |= REF_STATUS_UPTODATE; | |
34c290a6 | 1073 | if (read_ref((*tail)->name, &(*tail)->old_oid) < 0) |
3c5077fe | 1074 | die(_("Could not read ref %s"), |
ae25fd39 | 1075 | (*tail)->name); |
f8ec9167 DB |
1076 | } |
1077 | } | |
6eb996b5 DB |
1078 | tail = &((*tail)->next); |
1079 | } | |
bf3c523c IL |
1080 | if (debug) |
1081 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
1082 | strbuf_release(&buf); |
1083 | ||
1084 | for (posn = ret; posn; posn = posn->next) | |
1085 | resolve_remote_symref(posn, ret); | |
1086 | ||
1087 | return ret; | |
1088 | } | |
1089 | ||
e967ca38 JT |
1090 | static struct transport_vtable vtable = { |
1091 | set_helper_option, | |
1092 | get_refs_list, | |
1093 | fetch, | |
1094 | push_refs, | |
1095 | connect_helper, | |
1096 | release_helper | |
1097 | }; | |
1098 | ||
c9e388bb | 1099 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 | 1100 | { |
92e25b6b | 1101 | struct helper_data *data = xcalloc(1, sizeof(*data)); |
c9e388bb | 1102 | data->name = name; |
6eb996b5 | 1103 | |
a5adaced JK |
1104 | transport_check_allowed(name); |
1105 | ||
bf3c523c IL |
1106 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
1107 | debug = 1; | |
1108 | ||
6eb996b5 | 1109 | transport->data = data; |
e967ca38 | 1110 | transport->vtable = &vtable; |
61b075bd | 1111 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
1112 | return 0; |
1113 | } | |
419f37db IL |
1114 | |
1115 | /* | |
1116 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
1117 | * buffer less), so attempt reads and writes with up to that size. | |
1118 | */ | |
1119 | #define BUFFERSIZE 65536 | |
1120 | /* This should be enough to hold debugging message. */ | |
1121 | #define PBUFFERSIZE 8192 | |
1122 | ||
1123 | /* Print bidirectional transfer loop debug message. */ | |
4621085b | 1124 | __attribute__((format (printf, 1, 2))) |
419f37db IL |
1125 | static void transfer_debug(const char *fmt, ...) |
1126 | { | |
6cdf8a79 MÅ |
1127 | /* |
1128 | * NEEDSWORK: This function is sometimes used from multiple threads, and | |
1129 | * we end up using debug_enabled racily. That "should not matter" since | |
1130 | * we always write the same value, but it's still wrong. This function | |
1131 | * is listed in .tsan-suppressions for the time being. | |
1132 | */ | |
1133 | ||
419f37db IL |
1134 | va_list args; |
1135 | char msgbuf[PBUFFERSIZE]; | |
1136 | static int debug_enabled = -1; | |
1137 | ||
1138 | if (debug_enabled < 0) | |
1139 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
1140 | if (!debug_enabled) | |
1141 | return; | |
1142 | ||
1143 | va_start(args, fmt); | |
1144 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
1145 | va_end(args); | |
1146 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
1147 | } | |
1148 | ||
1149 | /* Stream state: More data may be coming in this direction. */ | |
2e3a16b2 | 1150 | #define SSTATE_TRANSFERRING 0 |
419f37db IL |
1151 | /* |
1152 | * Stream state: No more data coming in this direction, flushing rest of | |
1153 | * data. | |
1154 | */ | |
1155 | #define SSTATE_FLUSHING 1 | |
1156 | /* Stream state: Transfer in this direction finished. */ | |
1157 | #define SSTATE_FINISHED 2 | |
1158 | ||
2e3a16b2 | 1159 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING) |
419f37db IL |
1160 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) |
1161 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
1162 | ||
1163 | /* Unidirectional transfer. */ | |
1164 | struct unidirectional_transfer { | |
1165 | /* Source */ | |
1166 | int src; | |
1167 | /* Destination */ | |
1168 | int dest; | |
1169 | /* Is source socket? */ | |
1170 | int src_is_sock; | |
1171 | /* Is destination socket? */ | |
1172 | int dest_is_sock; | |
41ccfdd9 | 1173 | /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */ |
419f37db IL |
1174 | int state; |
1175 | /* Buffer. */ | |
1176 | char buf[BUFFERSIZE]; | |
1177 | /* Buffer used. */ | |
1178 | size_t bufuse; | |
1179 | /* Name of source. */ | |
1180 | const char *src_name; | |
1181 | /* Name of destination. */ | |
1182 | const char *dest_name; | |
1183 | }; | |
1184 | ||
1185 | /* Closes the target (for writing) if transfer has finished. */ | |
1186 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
1187 | { | |
1188 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
1189 | t->state = SSTATE_FINISHED; | |
1190 | if (t->dest_is_sock) | |
1191 | shutdown(t->dest, SHUT_WR); | |
1192 | else | |
1193 | close(t->dest); | |
1194 | transfer_debug("Closed %s.", t->dest_name); | |
1195 | } | |
1196 | } | |
1197 | ||
1198 | /* | |
832c0e5e | 1199 | * Tries to read data from source into buffer. If buffer is full, |
419f37db IL |
1200 | * no data is read. Returns 0 on success, -1 on error. |
1201 | */ | |
1202 | static int udt_do_read(struct unidirectional_transfer *t) | |
1203 | { | |
1204 | ssize_t bytes; | |
1205 | ||
1206 | if (t->bufuse == BUFFERSIZE) | |
1207 | return 0; /* No space for more. */ | |
1208 | ||
1209 | transfer_debug("%s is readable", t->src_name); | |
1210 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
1211 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1212 | errno != EINTR) { | |
1fee1dce | 1213 | error_errno("read(%s) failed", t->src_name); |
419f37db IL |
1214 | return -1; |
1215 | } else if (bytes == 0) { | |
1216 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
4621085b | 1217 | t->src_name, (int)t->bufuse); |
419f37db IL |
1218 | t->state = SSTATE_FLUSHING; |
1219 | } else if (bytes > 0) { | |
1220 | t->bufuse += bytes; | |
1221 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
1222 | (int)bytes, t->src_name, (int)t->bufuse); | |
1223 | } | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | /* Tries to write data from buffer into destination. If buffer is empty, | |
1228 | * no data is written. Returns 0 on success, -1 on error. | |
1229 | */ | |
1230 | static int udt_do_write(struct unidirectional_transfer *t) | |
1231 | { | |
803dbdb9 | 1232 | ssize_t bytes; |
419f37db IL |
1233 | |
1234 | if (t->bufuse == 0) | |
1235 | return 0; /* Nothing to write. */ | |
1236 | ||
1237 | transfer_debug("%s is writable", t->dest_name); | |
7edc02f4 EFL |
1238 | bytes = xwrite(t->dest, t->buf, t->bufuse); |
1239 | if (bytes < 0 && errno != EWOULDBLOCK) { | |
1fee1dce | 1240 | error_errno("write(%s) failed", t->dest_name); |
419f37db IL |
1241 | return -1; |
1242 | } else if (bytes > 0) { | |
1243 | t->bufuse -= bytes; | |
1244 | if (t->bufuse) | |
1245 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1246 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1247 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1248 | } | |
1249 | return 0; | |
1250 | } | |
1251 | ||
1252 | ||
1253 | /* State of bidirectional transfer loop. */ | |
1254 | struct bidirectional_transfer_state { | |
1255 | /* Direction from program to git. */ | |
1256 | struct unidirectional_transfer ptg; | |
1257 | /* Direction from git to program. */ | |
1258 | struct unidirectional_transfer gtp; | |
1259 | }; | |
1260 | ||
1261 | static void *udt_copy_task_routine(void *udt) | |
1262 | { | |
1263 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1264 | while (t->state != SSTATE_FINISHED) { | |
1265 | if (STATE_NEEDS_READING(t->state)) | |
1266 | if (udt_do_read(t)) | |
1267 | return NULL; | |
1268 | if (STATE_NEEDS_WRITING(t->state)) | |
1269 | if (udt_do_write(t)) | |
1270 | return NULL; | |
1271 | if (STATE_NEEDS_CLOSING(t->state)) | |
1272 | udt_close_if_finished(t); | |
1273 | } | |
1274 | return udt; /* Just some non-NULL value. */ | |
1275 | } | |
1276 | ||
1277 | #ifndef NO_PTHREADS | |
1278 | ||
1279 | /* | |
98e023de | 1280 | * Join thread, with appropriate errors on failure. Name is name for the |
419f37db IL |
1281 | * thread (for error messages). Returns 0 on success, 1 on failure. |
1282 | */ | |
1283 | static int tloop_join(pthread_t thread, const char *name) | |
1284 | { | |
1285 | int err; | |
1286 | void *tret; | |
1287 | err = pthread_join(thread, &tret); | |
1288 | if (!tret) { | |
1289 | error("%s thread failed", name); | |
1290 | return 1; | |
1291 | } | |
1292 | if (err) { | |
1293 | error("%s thread failed to join: %s", name, strerror(err)); | |
1294 | return 1; | |
1295 | } | |
1296 | return 0; | |
1297 | } | |
1298 | ||
1299 | /* | |
1300 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1301 | * -1 on failure. | |
1302 | */ | |
1303 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1304 | { | |
1305 | pthread_t gtp_thread; | |
1306 | pthread_t ptg_thread; | |
1307 | int err; | |
1308 | int ret = 0; | |
1309 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1310 | &s->gtp); | |
1311 | if (err) | |
1312 | die("Can't start thread for copying data: %s", strerror(err)); | |
1313 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, | |
1314 | &s->ptg); | |
1315 | if (err) | |
1316 | die("Can't start thread for copying data: %s", strerror(err)); | |
1317 | ||
1318 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1319 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1320 | return ret; | |
1321 | } | |
1322 | #else | |
1323 | ||
1324 | /* Close the source and target (for writing) for transfer. */ | |
1325 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1326 | { | |
1327 | t->state = SSTATE_FINISHED; | |
1328 | /* | |
1329 | * Socket read end left open isn't a disaster if nobody | |
1330 | * attempts to read from it (mingw compat headers do not | |
1331 | * have SHUT_RD)... | |
1332 | * | |
1333 | * We can't fully close the socket since otherwise gtp | |
1334 | * task would first close the socket it sends data to | |
1335 | * while closing the ptg file descriptors. | |
1336 | */ | |
1337 | if (!t->src_is_sock) | |
1338 | close(t->src); | |
1339 | if (t->dest_is_sock) | |
1340 | shutdown(t->dest, SHUT_WR); | |
1341 | else | |
1342 | close(t->dest); | |
1343 | } | |
1344 | ||
1345 | /* | |
98e023de | 1346 | * Join process, with appropriate errors on failure. Name is name for the |
419f37db IL |
1347 | * process (for error messages). Returns 0 on success, 1 on failure. |
1348 | */ | |
1349 | static int tloop_join(pid_t pid, const char *name) | |
1350 | { | |
1351 | int tret; | |
1352 | if (waitpid(pid, &tret, 0) < 0) { | |
1fee1dce | 1353 | error_errno("%s process failed to wait", name); |
419f37db IL |
1354 | return 1; |
1355 | } | |
1356 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
1357 | error("%s process failed", name); | |
1358 | return 1; | |
1359 | } | |
1360 | return 0; | |
1361 | } | |
1362 | ||
1363 | /* | |
1364 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1365 | * -1 on failure. | |
1366 | */ | |
1367 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1368 | { | |
1369 | pid_t pid1, pid2; | |
1370 | int ret = 0; | |
1371 | ||
1372 | /* Fork thread #1: git to program. */ | |
1373 | pid1 = fork(); | |
1374 | if (pid1 < 0) | |
1375 | die_errno("Can't start thread for copying data"); | |
1376 | else if (pid1 == 0) { | |
1377 | udt_kill_transfer(&s->ptg); | |
1378 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1379 | } | |
1380 | ||
1381 | /* Fork thread #2: program to git. */ | |
1382 | pid2 = fork(); | |
1383 | if (pid2 < 0) | |
1384 | die_errno("Can't start thread for copying data"); | |
1385 | else if (pid2 == 0) { | |
1386 | udt_kill_transfer(&s->gtp); | |
1387 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1388 | } | |
1389 | ||
1390 | /* | |
1391 | * Close both streams in parent as to not interfere with | |
1392 | * end of file detection and wait for both tasks to finish. | |
1393 | */ | |
1394 | udt_kill_transfer(&s->gtp); | |
1395 | udt_kill_transfer(&s->ptg); | |
1396 | ret |= tloop_join(pid1, "Git to program copy"); | |
1397 | ret |= tloop_join(pid2, "Program to git copy"); | |
1398 | return ret; | |
1399 | } | |
1400 | #endif | |
1401 | ||
1402 | /* | |
1403 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1404 | * Additionally filtering through given filter. If filter is NULL, uses | |
1405 | * identity filter. | |
1406 | */ | |
1407 | int bidirectional_transfer_loop(int input, int output) | |
1408 | { | |
1409 | struct bidirectional_transfer_state state; | |
1410 | ||
1411 | /* Fill the state fields. */ | |
1412 | state.ptg.src = input; | |
1413 | state.ptg.dest = 1; | |
1414 | state.ptg.src_is_sock = (input == output); | |
1415 | state.ptg.dest_is_sock = 0; | |
2e3a16b2 | 1416 | state.ptg.state = SSTATE_TRANSFERRING; |
419f37db IL |
1417 | state.ptg.bufuse = 0; |
1418 | state.ptg.src_name = "remote input"; | |
1419 | state.ptg.dest_name = "stdout"; | |
1420 | ||
1421 | state.gtp.src = 0; | |
1422 | state.gtp.dest = output; | |
1423 | state.gtp.src_is_sock = 0; | |
1424 | state.gtp.dest_is_sock = (input == output); | |
2e3a16b2 | 1425 | state.gtp.state = SSTATE_TRANSFERRING; |
419f37db IL |
1426 | state.gtp.bufuse = 0; |
1427 | state.gtp.src_name = "stdin"; | |
1428 | state.gtp.dest_name = "remote output"; | |
1429 | ||
1430 | return tloop_spawnwait_tasks(&state); | |
1431 | } |