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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" |
7851b1e6 | 14 | |
bf3c523c IL |
15 | static int debug; |
16 | ||
9cba13ca | 17 | struct helper_data { |
6eb996b5 DB |
18 | const char *name; |
19 | struct child_process *helper; | |
292ce46b | 20 | FILE *out; |
ef08ef9e | 21 | unsigned fetch : 1, |
a24a32dd | 22 | import : 1, |
bfc366d9 | 23 | bidi_import : 1, |
73b49a75 | 24 | export : 1, |
ae4efe19 | 25 | option : 1, |
fa8c097c IL |
26 | push : 1, |
27 | connect : 1, | |
0d957a4d | 28 | signed_tags : 1, |
9ba38048 | 29 | check_connectivity : 1, |
597b831a MM |
30 | no_disconnect_req : 1, |
31 | no_private_update : 1; | |
a515ebe9 SR |
32 | char *export_marks; |
33 | char *import_marks; | |
72ff8943 DB |
34 | /* These go from remote name (as in "list") to private name */ |
35 | struct refspec *refspecs; | |
36 | int refspec_nr; | |
61b075bd IL |
37 | /* Transport options for fetch-pack/send-pack (should one of |
38 | * those be invoked). | |
39 | */ | |
40 | struct git_transport_options transport_options; | |
6eb996b5 DB |
41 | }; |
42 | ||
bf3c523c IL |
43 | static void sendline(struct helper_data *helper, struct strbuf *buffer) |
44 | { | |
45 | if (debug) | |
46 | fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf); | |
06f46f23 | 47 | if (write_in_full(helper->helper->in, buffer->buf, buffer->len) < 0) |
bf3c523c IL |
48 | die_errno("Full write to remote helper failed"); |
49 | } | |
50 | ||
c096955c | 51 | static int recvline_fh(FILE *helper, struct strbuf *buffer, const char *name) |
bf3c523c IL |
52 | { |
53 | strbuf_reset(buffer); | |
54 | if (debug) | |
55 | fprintf(stderr, "Debug: Remote helper: Waiting...\n"); | |
692dfdfa | 56 | if (strbuf_getline(buffer, helper) == EOF) { |
bf3c523c IL |
57 | if (debug) |
58 | fprintf(stderr, "Debug: Remote helper quit.\n"); | |
5931b33e | 59 | return 1; |
bf3c523c IL |
60 | } |
61 | ||
62 | if (debug) | |
63 | fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf); | |
64 | return 0; | |
65 | } | |
66 | ||
fa8c097c IL |
67 | static int recvline(struct helper_data *helper, struct strbuf *buffer) |
68 | { | |
c096955c | 69 | return recvline_fh(helper->out, buffer, helper->name); |
fa8c097c IL |
70 | } |
71 | ||
bf3c523c IL |
72 | static void write_constant(int fd, const char *str) |
73 | { | |
74 | if (debug) | |
75 | fprintf(stderr, "Debug: Remote helper: -> %s", str); | |
06f46f23 | 76 | if (write_in_full(fd, str, strlen(str)) < 0) |
bf3c523c IL |
77 | die_errno("Full write to remote helper failed"); |
78 | } | |
79 | ||
c2e86add | 80 | static const char *remove_ext_force(const char *url) |
25d5cc48 IL |
81 | { |
82 | if (url) { | |
83 | const char *colon = strchr(url, ':'); | |
84 | if (colon && colon[1] == ':') | |
85 | return colon + 2; | |
86 | } | |
87 | return url; | |
88 | } | |
89 | ||
fa8c097c IL |
90 | static void do_take_over(struct transport *transport) |
91 | { | |
92 | struct helper_data *data; | |
93 | data = (struct helper_data *)transport->data; | |
94 | transport_take_over(transport, data->helper); | |
95 | fclose(data->out); | |
96 | free(data); | |
97 | } | |
98 | ||
2879bc3b MH |
99 | static void standard_options(struct transport *t); |
100 | ||
6eb996b5 DB |
101 | static struct child_process *get_helper(struct transport *transport) |
102 | { | |
103 | struct helper_data *data = transport->data; | |
104 | struct strbuf buf = STRBUF_INIT; | |
105 | struct child_process *helper; | |
72ff8943 DB |
106 | const char **refspecs = NULL; |
107 | int refspec_nr = 0; | |
108 | int refspec_alloc = 0; | |
61b075bd | 109 | int duped; |
6b02de3b | 110 | int code; |
6eb996b5 DB |
111 | |
112 | if (data->helper) | |
113 | return data->helper; | |
114 | ||
483bbd4e RS |
115 | helper = xmalloc(sizeof(*helper)); |
116 | child_process_init(helper); | |
6eb996b5 DB |
117 | helper->in = -1; |
118 | helper->out = -1; | |
119 | helper->err = 0; | |
e0ab2ac6 JK |
120 | argv_array_pushf(&helper->args, "git-remote-%s", data->name); |
121 | argv_array_push(&helper->args, transport->remote->name); | |
122 | argv_array_push(&helper->args, remove_ext_force(transport->url)); | |
6b02de3b IL |
123 | helper->git_cmd = 0; |
124 | helper->silent_exec_failure = 1; | |
e1735872 | 125 | |
4b0c3c77 JN |
126 | if (have_git_dir()) |
127 | argv_array_pushf(&helper->env_array, "%s=%s", | |
128 | GIT_DIR_ENVIRONMENT, get_git_dir()); | |
e1735872 | 129 | |
6b02de3b IL |
130 | code = start_command(helper); |
131 | if (code < 0 && errno == ENOENT) | |
132 | die("Unable to find remote helper for '%s'", data->name); | |
133 | else if (code != 0) | |
134 | exit(code); | |
135 | ||
6eb996b5 | 136 | data->helper = helper; |
fa8c097c | 137 | data->no_disconnect_req = 0; |
6eb996b5 | 138 | |
61b075bd | 139 | /* |
1a0c8dfd JH |
140 | * Open the output as FILE* so strbuf_getline_*() family of |
141 | * functions can be used. | |
61b075bd IL |
142 | * Do this with duped fd because fclose() will close the fd, |
143 | * and stuff like taking over will require the fd to remain. | |
61b075bd IL |
144 | */ |
145 | duped = dup(helper->out); | |
146 | if (duped < 0) | |
147 | die_errno("Can't dup helper output fd"); | |
148 | data->out = xfdopen(duped, "r"); | |
149 | ||
bf3c523c | 150 | write_constant(helper->in, "capabilities\n"); |
2d14d65c | 151 | |
6eb996b5 | 152 | while (1) { |
21a2d4ad | 153 | const char *capname, *arg; |
28ed5b35 | 154 | int mandatory = 0; |
5931b33e FC |
155 | if (recvline(data, &buf)) |
156 | exit(128); | |
6eb996b5 DB |
157 | |
158 | if (!*buf.buf) | |
159 | break; | |
28ed5b35 IL |
160 | |
161 | if (*buf.buf == '*') { | |
162 | capname = buf.buf + 1; | |
163 | mandatory = 1; | |
164 | } else | |
165 | capname = buf.buf; | |
166 | ||
bf3c523c | 167 | if (debug) |
28ed5b35 IL |
168 | fprintf(stderr, "Debug: Got cap %s\n", capname); |
169 | if (!strcmp(capname, "fetch")) | |
6eb996b5 | 170 | data->fetch = 1; |
28ed5b35 | 171 | else if (!strcmp(capname, "option")) |
ef08ef9e | 172 | data->option = 1; |
28ed5b35 | 173 | else if (!strcmp(capname, "push")) |
ae4efe19 | 174 | data->push = 1; |
28ed5b35 | 175 | else if (!strcmp(capname, "import")) |
e65e91ed | 176 | data->import = 1; |
bfc366d9 FA |
177 | else if (!strcmp(capname, "bidi-import")) |
178 | data->bidi_import = 1; | |
73b49a75 SR |
179 | else if (!strcmp(capname, "export")) |
180 | data->export = 1; | |
9ba38048 NTND |
181 | else if (!strcmp(capname, "check-connectivity")) |
182 | data->check_connectivity = 1; | |
21a2d4ad | 183 | else if (!data->refspecs && skip_prefix(capname, "refspec ", &arg)) { |
72ff8943 DB |
184 | ALLOC_GROW(refspecs, |
185 | refspec_nr + 1, | |
186 | refspec_alloc); | |
21a2d4ad | 187 | refspecs[refspec_nr++] = xstrdup(arg); |
fa8c097c IL |
188 | } else if (!strcmp(capname, "connect")) { |
189 | data->connect = 1; | |
0d957a4d JK |
190 | } else if (!strcmp(capname, "signed-tags")) { |
191 | data->signed_tags = 1; | |
21a2d4ad JK |
192 | } else if (skip_prefix(capname, "export-marks ", &arg)) { |
193 | data->export_marks = xstrdup(arg); | |
194 | } else if (skip_prefix(capname, "import-marks ", &arg)) { | |
195 | data->import_marks = xstrdup(arg); | |
59556548 | 196 | } else if (starts_with(capname, "no-private-update")) { |
597b831a | 197 | data->no_private_update = 1; |
28ed5b35 | 198 | } else if (mandatory) { |
9517e6b8 | 199 | die("Unknown mandatory capability %s. This remote " |
82247e9b | 200 | "helper probably needs newer version of Git.", |
28ed5b35 | 201 | capname); |
72ff8943 DB |
202 | } |
203 | } | |
204 | if (refspecs) { | |
205 | int i; | |
206 | data->refspec_nr = refspec_nr; | |
207 | data->refspecs = parse_fetch_refspec(refspec_nr, refspecs); | |
b120ef3e | 208 | for (i = 0; i < refspec_nr; i++) |
72ff8943 | 209 | free((char *)refspecs[i]); |
72ff8943 | 210 | free(refspecs); |
a93b4a09 FC |
211 | } else if (data->import || data->bidi_import || data->export) { |
212 | warning("This remote helper should implement refspec capability."); | |
6eb996b5 | 213 | } |
b962dbdc | 214 | strbuf_release(&buf); |
bf3c523c IL |
215 | if (debug) |
216 | fprintf(stderr, "Debug: Capabilities complete.\n"); | |
2879bc3b | 217 | standard_options(transport); |
6eb996b5 DB |
218 | return data->helper; |
219 | } | |
220 | ||
221 | static int disconnect_helper(struct transport *transport) | |
222 | { | |
223 | struct helper_data *data = transport->data; | |
cc567322 | 224 | int res = 0; |
bf3c523c | 225 | |
6eb996b5 | 226 | if (data->helper) { |
bf3c523c IL |
227 | if (debug) |
228 | fprintf(stderr, "Debug: Disconnecting.\n"); | |
fa8c097c | 229 | if (!data->no_disconnect_req) { |
c34fe630 JK |
230 | /* |
231 | * Ignore write errors; there's nothing we can do, | |
232 | * since we're about to close the pipe anyway. And the | |
233 | * most likely error is EPIPE due to the helper dying | |
234 | * to report an error itself. | |
235 | */ | |
236 | sigchain_push(SIGPIPE, SIG_IGN); | |
237 | xwrite(data->helper->in, "\n", 1); | |
238 | sigchain_pop(SIGPIPE); | |
fa8c097c | 239 | } |
6eb996b5 | 240 | close(data->helper->in); |
61b075bd | 241 | close(data->helper->out); |
292ce46b | 242 | fclose(data->out); |
cc567322 | 243 | res = finish_command(data->helper); |
6a83d902 | 244 | FREE_AND_NULL(data->helper); |
6eb996b5 | 245 | } |
cc567322 | 246 | return res; |
6eb996b5 DB |
247 | } |
248 | ||
ef08ef9e SP |
249 | static const char *unsupported_options[] = { |
250 | TRANS_OPT_UPLOADPACK, | |
251 | TRANS_OPT_RECEIVEPACK, | |
252 | TRANS_OPT_THIN, | |
253 | TRANS_OPT_KEEP | |
254 | }; | |
23cd01ec | 255 | |
ef08ef9e SP |
256 | static const char *boolean_options[] = { |
257 | TRANS_OPT_THIN, | |
258 | TRANS_OPT_KEEP, | |
0ea47f9d | 259 | TRANS_OPT_FOLLOWTAGS, |
cccf74e2 | 260 | TRANS_OPT_DEEPEN_RELATIVE |
ef08ef9e SP |
261 | }; |
262 | ||
9318c5dd NTND |
263 | static int strbuf_set_helper_option(struct helper_data *data, |
264 | struct strbuf *buf) | |
265 | { | |
266 | int ret; | |
267 | ||
268 | sendline(data, buf); | |
269 | if (recvline(data, buf)) | |
270 | exit(128); | |
271 | ||
272 | if (!strcmp(buf->buf, "ok")) | |
273 | ret = 0; | |
274 | else if (starts_with(buf->buf, "error")) | |
275 | ret = -1; | |
276 | else if (!strcmp(buf->buf, "unsupported")) | |
277 | ret = 1; | |
278 | else { | |
279 | warning("%s unexpectedly said: '%s'", data->name, buf->buf); | |
280 | ret = 1; | |
281 | } | |
282 | return ret; | |
283 | } | |
284 | ||
a45a2600 NTND |
285 | static int string_list_set_helper_option(struct helper_data *data, |
286 | const char *name, | |
287 | struct string_list *list) | |
288 | { | |
289 | struct strbuf buf = STRBUF_INIT; | |
290 | int i, ret = 0; | |
291 | ||
292 | for (i = 0; i < list->nr; i++) { | |
293 | strbuf_addf(&buf, "option %s ", name); | |
294 | quote_c_style(list->items[i].string, &buf, NULL, 0); | |
295 | strbuf_addch(&buf, '\n'); | |
296 | ||
297 | if ((ret = strbuf_set_helper_option(data, &buf))) | |
298 | break; | |
299 | strbuf_reset(&buf); | |
300 | } | |
301 | strbuf_release(&buf); | |
302 | return ret; | |
303 | } | |
304 | ||
ef08ef9e SP |
305 | static int set_helper_option(struct transport *transport, |
306 | const char *name, const char *value) | |
307 | { | |
308 | struct helper_data *data = transport->data; | |
ef08ef9e SP |
309 | struct strbuf buf = STRBUF_INIT; |
310 | int i, ret, is_bool = 0; | |
311 | ||
bf3c523c IL |
312 | get_helper(transport); |
313 | ||
ef08ef9e SP |
314 | if (!data->option) |
315 | return 1; | |
316 | ||
a45a2600 NTND |
317 | if (!strcmp(name, "deepen-not")) |
318 | return string_list_set_helper_option(data, name, | |
319 | (struct string_list *)value); | |
320 | ||
ef08ef9e SP |
321 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { |
322 | if (!strcmp(name, unsupported_options[i])) | |
323 | return 1; | |
324 | } | |
325 | ||
326 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
327 | if (!strcmp(name, boolean_options[i])) { | |
328 | is_bool = 1; | |
329 | break; | |
330 | } | |
331 | } | |
332 | ||
333 | strbuf_addf(&buf, "option %s ", name); | |
334 | if (is_bool) | |
335 | strbuf_addstr(&buf, value ? "true" : "false"); | |
336 | else | |
337 | quote_c_style(value, &buf, NULL, 0); | |
338 | strbuf_addch(&buf, '\n'); | |
339 | ||
9318c5dd | 340 | ret = strbuf_set_helper_option(data, &buf); |
ef08ef9e SP |
341 | strbuf_release(&buf); |
342 | return ret; | |
343 | } | |
344 | ||
345 | static void standard_options(struct transport *t) | |
346 | { | |
347 | char buf[16]; | |
ef08ef9e | 348 | int v = t->verbose; |
ef08ef9e | 349 | |
d01b3c02 | 350 | set_helper_option(t, "progress", t->progress ? "true" : "false"); |
ef08ef9e | 351 | |
8c5acfb9 | 352 | xsnprintf(buf, sizeof(buf), "%d", v + 1); |
ef08ef9e | 353 | set_helper_option(t, "verbosity", buf); |
c915f11e EW |
354 | |
355 | switch (t->family) { | |
356 | case TRANSPORT_FAMILY_ALL: | |
357 | /* | |
358 | * this is already the default, | |
359 | * do not break old remote helpers by setting "all" here | |
360 | */ | |
361 | break; | |
362 | case TRANSPORT_FAMILY_IPV4: | |
363 | set_helper_option(t, "family", "ipv4"); | |
364 | break; | |
365 | case TRANSPORT_FAMILY_IPV6: | |
366 | set_helper_option(t, "family", "ipv6"); | |
367 | break; | |
368 | } | |
ef08ef9e SP |
369 | } |
370 | ||
f2a37151 DB |
371 | static int release_helper(struct transport *transport) |
372 | { | |
cc567322 | 373 | int res = 0; |
72ff8943 DB |
374 | struct helper_data *data = transport->data; |
375 | free_refspec(data->refspec_nr, data->refspecs); | |
376 | data->refspecs = NULL; | |
cc567322 | 377 | res = disconnect_helper(transport); |
f2a37151 | 378 | free(transport->data); |
cc567322 | 379 | return res; |
f2a37151 DB |
380 | } |
381 | ||
6eb996b5 | 382 | static int fetch_with_fetch(struct transport *transport, |
37148311 | 383 | int nr_heads, struct ref **to_fetch) |
6eb996b5 | 384 | { |
292ce46b | 385 | struct helper_data *data = transport->data; |
6eb996b5 DB |
386 | int i; |
387 | struct strbuf buf = STRBUF_INIT; | |
388 | ||
389 | for (i = 0; i < nr_heads; i++) { | |
1088261f | 390 | const struct ref *posn = to_fetch[i]; |
6eb996b5 DB |
391 | if (posn->status & REF_STATUS_UPTODATE) |
392 | continue; | |
2d14d65c DB |
393 | |
394 | strbuf_addf(&buf, "fetch %s %s\n", | |
f4e54d02 | 395 | oid_to_hex(&posn->old_oid), |
33cae542 | 396 | posn->symref ? posn->symref : posn->name); |
292ce46b | 397 | } |
2d14d65c | 398 | |
292ce46b | 399 | strbuf_addch(&buf, '\n'); |
bf3c523c | 400 | sendline(data, &buf); |
292ce46b SP |
401 | |
402 | while (1) { | |
5931b33e FC |
403 | if (recvline(data, &buf)) |
404 | exit(128); | |
292ce46b | 405 | |
59556548 | 406 | if (starts_with(buf.buf, "lock ")) { |
292ce46b SP |
407 | const char *name = buf.buf + 5; |
408 | if (transport->pack_lockfile) | |
409 | warning("%s also locked %s", data->name, name); | |
410 | else | |
411 | transport->pack_lockfile = xstrdup(name); | |
412 | } | |
9ba38048 NTND |
413 | else if (data->check_connectivity && |
414 | data->transport_options.check_self_contained_and_connected && | |
415 | !strcmp(buf.buf, "connectivity-ok")) | |
416 | data->transport_options.self_contained_and_connected = 1; | |
292ce46b SP |
417 | else if (!buf.len) |
418 | break; | |
419 | else | |
420 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
6eb996b5 | 421 | } |
292ce46b | 422 | strbuf_release(&buf); |
6eb996b5 DB |
423 | return 0; |
424 | } | |
425 | ||
e65e91ed DB |
426 | static int get_importer(struct transport *transport, struct child_process *fastimport) |
427 | { | |
428 | struct child_process *helper = get_helper(transport); | |
bfc366d9 | 429 | struct helper_data *data = transport->data; |
bfc366d9 | 430 | int cat_blob_fd, code; |
483bbd4e | 431 | child_process_init(fastimport); |
e65e91ed | 432 | fastimport->in = helper->out; |
173fd1a1 JK |
433 | argv_array_push(&fastimport->args, "fast-import"); |
434 | argv_array_push(&fastimport->args, debug ? "--stats" : "--quiet"); | |
e65e91ed | 435 | |
bfc366d9 FA |
436 | if (data->bidi_import) { |
437 | cat_blob_fd = xdup(helper->in); | |
173fd1a1 | 438 | argv_array_pushf(&fastimport->args, "--cat-blob-fd=%d", cat_blob_fd); |
bfc366d9 | 439 | } |
e65e91ed | 440 | fastimport->git_cmd = 1; |
bfc366d9 FA |
441 | |
442 | code = start_command(fastimport); | |
443 | return code; | |
e65e91ed DB |
444 | } |
445 | ||
73b49a75 SR |
446 | static int get_exporter(struct transport *transport, |
447 | struct child_process *fastexport, | |
73b49a75 SR |
448 | struct string_list *revlist_args) |
449 | { | |
a515ebe9 | 450 | struct helper_data *data = transport->data; |
73b49a75 | 451 | struct child_process *helper = get_helper(transport); |
2aeae40a | 452 | int i; |
852e54bc | 453 | |
8828f298 | 454 | child_process_init(fastexport); |
73b49a75 SR |
455 | |
456 | /* we need to duplicate helper->in because we want to use it after | |
457 | * fastexport is done with it. */ | |
458 | fastexport->out = dup(helper->in); | |
2aeae40a JK |
459 | argv_array_push(&fastexport->args, "fast-export"); |
460 | argv_array_push(&fastexport->args, "--use-done-feature"); | |
461 | argv_array_push(&fastexport->args, data->signed_tags ? | |
462 | "--signed-tags=verbatim" : "--signed-tags=warn-strip"); | |
463 | if (data->export_marks) | |
464 | argv_array_pushf(&fastexport->args, "--export-marks=%s.tmp", data->export_marks); | |
465 | if (data->import_marks) | |
466 | argv_array_pushf(&fastexport->args, "--import-marks=%s", data->import_marks); | |
73b49a75 SR |
467 | |
468 | for (i = 0; i < revlist_args->nr; i++) | |
2aeae40a | 469 | argv_array_push(&fastexport->args, revlist_args->items[i].string); |
73b49a75 SR |
470 | |
471 | fastexport->git_cmd = 1; | |
472 | return start_command(fastexport); | |
473 | } | |
474 | ||
e65e91ed DB |
475 | static int fetch_with_import(struct transport *transport, |
476 | int nr_heads, struct ref **to_fetch) | |
477 | { | |
478 | struct child_process fastimport; | |
72ff8943 | 479 | struct helper_data *data = transport->data; |
e65e91ed DB |
480 | int i; |
481 | struct ref *posn; | |
482 | struct strbuf buf = STRBUF_INIT; | |
483 | ||
bf3c523c IL |
484 | get_helper(transport); |
485 | ||
e65e91ed DB |
486 | if (get_importer(transport, &fastimport)) |
487 | die("Couldn't run fast-import"); | |
488 | ||
489 | for (i = 0; i < nr_heads; i++) { | |
490 | posn = to_fetch[i]; | |
491 | if (posn->status & REF_STATUS_UPTODATE) | |
492 | continue; | |
493 | ||
33cae542 MH |
494 | strbuf_addf(&buf, "import %s\n", |
495 | posn->symref ? posn->symref : posn->name); | |
bf3c523c | 496 | sendline(data, &buf); |
e65e91ed DB |
497 | strbuf_reset(&buf); |
498 | } | |
9504bc9d SR |
499 | |
500 | write_constant(data->helper->in, "\n"); | |
bfc366d9 FA |
501 | /* |
502 | * remote-helpers that advertise the bidi-import capability are required to | |
503 | * buffer the complete batch of import commands until this newline before | |
504 | * sending data to fast-import. | |
505 | * These helpers read back data from fast-import on their stdin, which could | |
506 | * be mixed with import commands, otherwise. | |
507 | */ | |
9504bc9d | 508 | |
cc567322 SR |
509 | if (finish_command(&fastimport)) |
510 | die("Error while running fast-import"); | |
e65e91ed | 511 | |
dff9d65d FA |
512 | /* |
513 | * The fast-import stream of a remote helper that advertises | |
514 | * the "refspec" capability writes to the refs named after the | |
515 | * right hand side of the first refspec matching each ref we | |
516 | * were fetching. | |
517 | * | |
518 | * (If no "refspec" capability was specified, for historical | |
7a43c554 | 519 | * reasons we default to the equivalent of *:*.) |
dff9d65d FA |
520 | * |
521 | * Store the result in to_fetch[i].old_sha1. Callers such | |
522 | * as "git fetch" can use the value to write feedback to the | |
523 | * terminal, populate FETCH_HEAD, and determine what new value | |
524 | * should be written to peer_ref if the update is a | |
525 | * fast-forward or this is a forced update. | |
526 | */ | |
e65e91ed | 527 | for (i = 0; i < nr_heads; i++) { |
33cae542 | 528 | char *private, *name; |
e65e91ed DB |
529 | posn = to_fetch[i]; |
530 | if (posn->status & REF_STATUS_UPTODATE) | |
531 | continue; | |
33cae542 | 532 | name = posn->symref ? posn->symref : posn->name; |
72ff8943 | 533 | if (data->refspecs) |
33cae542 | 534 | private = apply_refspecs(data->refspecs, data->refspec_nr, name); |
72ff8943 | 535 | else |
33cae542 | 536 | private = xstrdup(name); |
d51b720f | 537 | if (private) { |
f4e54d02 | 538 | if (read_ref(private, posn->old_oid.hash) < 0) |
ae25fd39 | 539 | die("Could not read ref %s", private); |
d51b720f MH |
540 | free(private); |
541 | } | |
e65e91ed | 542 | } |
b962dbdc | 543 | strbuf_release(&buf); |
e65e91ed DB |
544 | return 0; |
545 | } | |
546 | ||
fa8c097c IL |
547 | static int process_connect_service(struct transport *transport, |
548 | const char *name, const char *exec) | |
549 | { | |
550 | struct helper_data *data = transport->data; | |
551 | struct strbuf cmdbuf = STRBUF_INIT; | |
552 | struct child_process *helper; | |
553 | int r, duped, ret = 0; | |
554 | FILE *input; | |
555 | ||
556 | helper = get_helper(transport); | |
557 | ||
558 | /* | |
559 | * Yes, dup the pipe another time, as we need unbuffered version | |
560 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
561 | * stream buffering only can be changed before first I/O operation | |
562 | * on it. | |
563 | */ | |
564 | duped = dup(helper->out); | |
565 | if (duped < 0) | |
566 | die_errno("Can't dup helper output fd"); | |
567 | input = xfdopen(duped, "r"); | |
568 | setvbuf(input, NULL, _IONBF, 0); | |
569 | ||
570 | /* | |
571 | * Handle --upload-pack and friends. This is fire and forget... | |
572 | * just warn if it fails. | |
573 | */ | |
574 | if (strcmp(name, exec)) { | |
575 | r = set_helper_option(transport, "servpath", exec); | |
576 | if (r > 0) | |
577 | warning("Setting remote service path not supported by protocol."); | |
578 | else if (r < 0) | |
579 | warning("Invalid remote service path."); | |
580 | } | |
581 | ||
582 | if (data->connect) | |
583 | strbuf_addf(&cmdbuf, "connect %s\n", name); | |
584 | else | |
585 | goto exit; | |
586 | ||
587 | sendline(data, &cmdbuf); | |
5931b33e FC |
588 | if (recvline_fh(input, &cmdbuf, name)) |
589 | exit(128); | |
590 | ||
fa8c097c IL |
591 | if (!strcmp(cmdbuf.buf, "")) { |
592 | data->no_disconnect_req = 1; | |
593 | if (debug) | |
594 | fprintf(stderr, "Debug: Smart transport connection " | |
595 | "ready.\n"); | |
596 | ret = 1; | |
597 | } else if (!strcmp(cmdbuf.buf, "fallback")) { | |
598 | if (debug) | |
599 | fprintf(stderr, "Debug: Falling back to dumb " | |
600 | "transport.\n"); | |
601 | } else | |
602 | die("Unknown response to connect: %s", | |
603 | cmdbuf.buf); | |
604 | ||
605 | exit: | |
4168be8e | 606 | strbuf_release(&cmdbuf); |
fa8c097c IL |
607 | fclose(input); |
608 | return ret; | |
609 | } | |
610 | ||
611 | static int process_connect(struct transport *transport, | |
612 | int for_push) | |
613 | { | |
614 | struct helper_data *data = transport->data; | |
615 | const char *name; | |
616 | const char *exec; | |
617 | ||
618 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
619 | if (for_push) | |
620 | exec = data->transport_options.receivepack; | |
621 | else | |
622 | exec = data->transport_options.uploadpack; | |
623 | ||
624 | return process_connect_service(transport, name, exec); | |
625 | } | |
626 | ||
b236752a IL |
627 | static int connect_helper(struct transport *transport, const char *name, |
628 | const char *exec, int fd[2]) | |
629 | { | |
630 | struct helper_data *data = transport->data; | |
631 | ||
632 | /* Get_helper so connect is inited. */ | |
633 | get_helper(transport); | |
634 | if (!data->connect) | |
635 | die("Operation not supported by protocol."); | |
636 | ||
637 | if (!process_connect_service(transport, name, exec)) | |
638 | die("Can't connect to subservice %s.", name); | |
639 | ||
640 | fd[0] = data->helper->out; | |
641 | fd[1] = data->helper->in; | |
642 | return 0; | |
643 | } | |
644 | ||
6eb996b5 | 645 | static int fetch(struct transport *transport, |
37148311 | 646 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
647 | { |
648 | struct helper_data *data = transport->data; | |
649 | int i, count; | |
650 | ||
fa8c097c IL |
651 | if (process_connect(transport, 0)) { |
652 | do_take_over(transport); | |
653 | return transport->fetch(transport, nr_heads, to_fetch); | |
654 | } | |
655 | ||
6eb996b5 DB |
656 | count = 0; |
657 | for (i = 0; i < nr_heads; i++) | |
658 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
659 | count++; | |
660 | ||
661 | if (!count) | |
662 | return 0; | |
663 | ||
aab1beb0 MH |
664 | if (data->check_connectivity && |
665 | data->transport_options.check_self_contained_and_connected) | |
666 | set_helper_option(transport, "check-connectivity", "true"); | |
667 | ||
668 | if (transport->cloning) | |
669 | set_helper_option(transport, "cloning", "true"); | |
670 | ||
671 | if (data->transport_options.update_shallow) | |
672 | set_helper_option(transport, "update-shallow", "true"); | |
673 | ||
6eb996b5 DB |
674 | if (data->fetch) |
675 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
676 | ||
e65e91ed DB |
677 | if (data->import) |
678 | return fetch_with_import(transport, nr_heads, to_fetch); | |
679 | ||
6eb996b5 DB |
680 | return -1; |
681 | } | |
682 | ||
664059fb | 683 | static int push_update_ref_status(struct strbuf *buf, |
d2e73c6f SR |
684 | struct ref **ref, |
685 | struct ref *remote_refs) | |
686 | { | |
687 | char *refname, *msg; | |
f9e3c6be | 688 | int status, forced = 0; |
d2e73c6f | 689 | |
59556548 | 690 | if (starts_with(buf->buf, "ok ")) { |
d2e73c6f SR |
691 | status = REF_STATUS_OK; |
692 | refname = buf->buf + 3; | |
59556548 | 693 | } else if (starts_with(buf->buf, "error ")) { |
d2e73c6f SR |
694 | status = REF_STATUS_REMOTE_REJECT; |
695 | refname = buf->buf + 6; | |
696 | } else | |
82247e9b | 697 | die("expected ok/error, helper said '%s'", buf->buf); |
d2e73c6f SR |
698 | |
699 | msg = strchr(refname, ' '); | |
700 | if (msg) { | |
701 | struct strbuf msg_buf = STRBUF_INIT; | |
702 | const char *end; | |
703 | ||
704 | *msg++ = '\0'; | |
705 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
706 | msg = strbuf_detach(&msg_buf, NULL); | |
707 | else | |
708 | msg = xstrdup(msg); | |
709 | strbuf_release(&msg_buf); | |
710 | ||
711 | if (!strcmp(msg, "no match")) { | |
712 | status = REF_STATUS_NONE; | |
6a83d902 | 713 | FREE_AND_NULL(msg); |
d2e73c6f SR |
714 | } |
715 | else if (!strcmp(msg, "up to date")) { | |
716 | status = REF_STATUS_UPTODATE; | |
6a83d902 | 717 | FREE_AND_NULL(msg); |
d2e73c6f SR |
718 | } |
719 | else if (!strcmp(msg, "non-fast forward")) { | |
720 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
6a83d902 | 721 | FREE_AND_NULL(msg); |
d2e73c6f | 722 | } |
dbfeddb1 CR |
723 | else if (!strcmp(msg, "already exists")) { |
724 | status = REF_STATUS_REJECT_ALREADY_EXISTS; | |
6a83d902 | 725 | FREE_AND_NULL(msg); |
dbfeddb1 | 726 | } |
75e5c0dc JH |
727 | else if (!strcmp(msg, "fetch first")) { |
728 | status = REF_STATUS_REJECT_FETCH_FIRST; | |
6a83d902 | 729 | FREE_AND_NULL(msg); |
75e5c0dc JH |
730 | } |
731 | else if (!strcmp(msg, "needs force")) { | |
732 | status = REF_STATUS_REJECT_NEEDS_FORCE; | |
6a83d902 | 733 | FREE_AND_NULL(msg); |
75e5c0dc | 734 | } |
631b5ef2 JH |
735 | else if (!strcmp(msg, "stale info")) { |
736 | status = REF_STATUS_REJECT_STALE; | |
6a83d902 | 737 | FREE_AND_NULL(msg); |
631b5ef2 | 738 | } |
f9e3c6be FC |
739 | else if (!strcmp(msg, "forced update")) { |
740 | forced = 1; | |
6a83d902 | 741 | FREE_AND_NULL(msg); |
f9e3c6be | 742 | } |
d2e73c6f SR |
743 | } |
744 | ||
745 | if (*ref) | |
746 | *ref = find_ref_by_name(*ref, refname); | |
747 | if (!*ref) | |
748 | *ref = find_ref_by_name(remote_refs, refname); | |
749 | if (!*ref) { | |
750 | warning("helper reported unexpected status of %s", refname); | |
664059fb | 751 | return 1; |
d2e73c6f SR |
752 | } |
753 | ||
754 | if ((*ref)->status != REF_STATUS_NONE) { | |
755 | /* | |
756 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
757 | * status reported by the remote helper if the latter is 'no match'. | |
758 | */ | |
759 | if (status == REF_STATUS_NONE) | |
664059fb | 760 | return 1; |
d2e73c6f SR |
761 | } |
762 | ||
763 | (*ref)->status = status; | |
cf31f70c | 764 | (*ref)->forced_update |= forced; |
d2e73c6f | 765 | (*ref)->remote_status = msg; |
126aac5c | 766 | return !(status == REF_STATUS_OK); |
d2e73c6f SR |
767 | } |
768 | ||
0551a06c | 769 | static int push_update_refs_status(struct helper_data *data, |
5a75353f FC |
770 | struct ref *remote_refs, |
771 | int flags) | |
d2e73c6f SR |
772 | { |
773 | struct strbuf buf = STRBUF_INIT; | |
774 | struct ref *ref = remote_refs; | |
0551a06c FC |
775 | int ret = 0; |
776 | ||
d2e73c6f | 777 | for (;;) { |
664059fb FC |
778 | char *private; |
779 | ||
0551a06c FC |
780 | if (recvline(data, &buf)) { |
781 | ret = 1; | |
782 | break; | |
783 | } | |
784 | ||
d2e73c6f SR |
785 | if (!buf.len) |
786 | break; | |
787 | ||
664059fb FC |
788 | if (push_update_ref_status(&buf, &ref, remote_refs)) |
789 | continue; | |
790 | ||
5a75353f | 791 | if (flags & TRANSPORT_PUSH_DRY_RUN || !data->refspecs || data->no_private_update) |
664059fb FC |
792 | continue; |
793 | ||
794 | /* propagate back the update to the remote namespace */ | |
795 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); | |
796 | if (!private) | |
797 | continue; | |
f4e54d02 | 798 | update_ref("update by helper", private, ref->new_oid.hash, NULL, 0, 0); |
664059fb | 799 | free(private); |
d2e73c6f SR |
800 | } |
801 | strbuf_release(&buf); | |
0551a06c | 802 | return ret; |
d2e73c6f SR |
803 | } |
804 | ||
30261094 DB |
805 | static void set_common_push_options(struct transport *transport, |
806 | const char *name, int flags) | |
807 | { | |
808 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
809 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
810 | die("helper %s does not support dry-run", name); | |
811 | } else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) { | |
812 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0) | |
813 | die("helper %s does not support --signed", name); | |
814 | } else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) { | |
815 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0) | |
816 | die("helper %s does not support --signed=if-asked", name); | |
817 | } | |
438fc684 SB |
818 | |
819 | if (flags & TRANSPORT_PUSH_OPTIONS) { | |
820 | struct string_list_item *item; | |
821 | for_each_string_list_item(item, transport->push_options) | |
822 | if (set_helper_option(transport, "push-option", item->string) != 0) | |
823 | die("helper %s does not support 'push-option'", name); | |
824 | } | |
30261094 DB |
825 | } |
826 | ||
73b49a75 | 827 | static int push_refs_with_push(struct transport *transport, |
05c1eb10 | 828 | struct ref *remote_refs, int flags) |
ae4efe19 SP |
829 | { |
830 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
831 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
832 | struct helper_data *data = transport->data; | |
833 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 | 834 | struct ref *ref; |
05c1eb10 JH |
835 | struct string_list cas_options = STRING_LIST_INIT_DUP; |
836 | struct string_list_item *cas_option; | |
ae4efe19 | 837 | |
c0aa335c | 838 | get_helper(transport); |
ae4efe19 SP |
839 | if (!data->push) |
840 | return 1; | |
841 | ||
842 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 843 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
844 | continue; |
845 | ||
20e8b465 TRC |
846 | /* Check for statuses set by set_ref_status_for_push() */ |
847 | switch (ref->status) { | |
848 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
631b5ef2 | 849 | case REF_STATUS_REJECT_STALE: |
dbfeddb1 | 850 | case REF_STATUS_REJECT_ALREADY_EXISTS: |
20e8b465 | 851 | case REF_STATUS_UPTODATE: |
ae4efe19 | 852 | continue; |
20e8b465 TRC |
853 | default: |
854 | ; /* do nothing */ | |
ae4efe19 SP |
855 | } |
856 | ||
857 | if (force_all) | |
858 | ref->force = 1; | |
859 | ||
860 | strbuf_addstr(&buf, "push "); | |
861 | if (!ref->deletion) { | |
862 | if (ref->force) | |
863 | strbuf_addch(&buf, '+'); | |
864 | if (ref->peer_ref) | |
865 | strbuf_addstr(&buf, ref->peer_ref->name); | |
866 | else | |
f4e54d02 | 867 | strbuf_addstr(&buf, oid_to_hex(&ref->new_oid)); |
ae4efe19 SP |
868 | } |
869 | strbuf_addch(&buf, ':'); | |
870 | strbuf_addstr(&buf, ref->name); | |
871 | strbuf_addch(&buf, '\n'); | |
05c1eb10 JH |
872 | |
873 | /* | |
874 | * The "--force-with-lease" options without explicit | |
875 | * values to expect have already been expanded into | |
f4e54d02 | 876 | * the ref->old_oid_expect[] field; we can ignore |
05c1eb10 JH |
877 | * transport->smart_options->cas altogether and instead |
878 | * can enumerate them from the refs. | |
879 | */ | |
880 | if (ref->expect_old_sha1) { | |
881 | struct strbuf cas = STRBUF_INIT; | |
882 | strbuf_addf(&cas, "%s:%s", | |
f4e54d02 | 883 | ref->name, oid_to_hex(&ref->old_oid_expect)); |
05c1eb10 JH |
884 | string_list_append(&cas_options, strbuf_detach(&cas, NULL)); |
885 | } | |
ae4efe19 | 886 | } |
05c1eb10 JH |
887 | if (buf.len == 0) { |
888 | string_list_clear(&cas_options, 0); | |
d8f67d20 | 889 | return 0; |
05c1eb10 | 890 | } |
ae4efe19 | 891 | |
05c1eb10 JH |
892 | for_each_string_list_item(cas_option, &cas_options) |
893 | set_helper_option(transport, "cas", cas_option->string); | |
30261094 | 894 | set_common_push_options(transport, data->name, flags); |
ae4efe19 SP |
895 | |
896 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 897 | sendline(data, &buf); |
ae4efe19 | 898 | strbuf_release(&buf); |
d2e73c6f | 899 | |
0551a06c | 900 | return push_update_refs_status(data, remote_refs, flags); |
ae4efe19 SP |
901 | } |
902 | ||
73b49a75 SR |
903 | static int push_refs_with_export(struct transport *transport, |
904 | struct ref *remote_refs, int flags) | |
905 | { | |
906 | struct ref *ref; | |
907 | struct child_process *helper, exporter; | |
908 | struct helper_data *data = transport->data; | |
d98c8153 | 909 | struct string_list revlist_args = STRING_LIST_INIT_DUP; |
73b49a75 SR |
910 | struct strbuf buf = STRBUF_INIT; |
911 | ||
21610d82 FC |
912 | if (!data->refspecs) |
913 | die("remote-helper doesn't support push; refspec needed"); | |
914 | ||
30261094 | 915 | set_common_push_options(transport, data->name, flags); |
510fa6f5 FC |
916 | if (flags & TRANSPORT_PUSH_FORCE) { |
917 | if (set_helper_option(transport, "force", "true") != 0) | |
918 | warning("helper %s does not support 'force'", data->name); | |
919 | } | |
920 | ||
73b49a75 SR |
921 | helper = get_helper(transport); |
922 | ||
923 | write_constant(helper->in, "export\n"); | |
924 | ||
73b49a75 SR |
925 | for (ref = remote_refs; ref; ref = ref->next) { |
926 | char *private; | |
27912a03 | 927 | struct object_id oid; |
73b49a75 | 928 | |
73b49a75 | 929 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); |
e82caf38 | 930 | if (private && !get_oid(private, &oid)) { |
73b49a75 | 931 | strbuf_addf(&buf, "^%s", private); |
1d2f80fa | 932 | string_list_append(&revlist_args, strbuf_detach(&buf, NULL)); |
27912a03 | 933 | oidcpy(&ref->old_oid, &oid); |
73b49a75 | 934 | } |
2faa1527 | 935 | free(private); |
73b49a75 | 936 | |
67c9c782 | 937 | if (ref->peer_ref) { |
d98c8153 | 938 | if (strcmp(ref->name, ref->peer_ref->name)) { |
f3d03763 FC |
939 | if (!ref->deletion) { |
940 | const char *name; | |
941 | int flag; | |
942 | ||
943 | /* Follow symbolic refs (mainly for HEAD). */ | |
7695d118 RS |
944 | name = resolve_ref_unsafe( |
945 | ref->peer_ref->name, | |
946 | RESOLVE_REF_READING, | |
27912a03 | 947 | oid.hash, &flag); |
f3d03763 FC |
948 | if (!name || !(flag & REF_ISSYMREF)) |
949 | name = ref->peer_ref->name; | |
9193f742 | 950 | |
f3d03763 FC |
951 | strbuf_addf(&buf, "%s:%s", name, ref->name); |
952 | } else | |
953 | strbuf_addf(&buf, ":%s", ref->name); | |
9193f742 | 954 | |
d98c8153 FC |
955 | string_list_append(&revlist_args, "--refspec"); |
956 | string_list_append(&revlist_args, buf.buf); | |
957 | strbuf_release(&buf); | |
958 | } | |
f3d03763 FC |
959 | if (!ref->deletion) |
960 | string_list_append(&revlist_args, ref->peer_ref->name); | |
67c9c782 | 961 | } |
73b49a75 SR |
962 | } |
963 | ||
a515ebe9 | 964 | if (get_exporter(transport, &exporter, &revlist_args)) |
73b49a75 SR |
965 | die("Couldn't run fast-export"); |
966 | ||
d98c8153 FC |
967 | string_list_clear(&revlist_args, 1); |
968 | ||
cc567322 SR |
969 | if (finish_command(&exporter)) |
970 | die("Error while running fast-export"); | |
3994e64d FC |
971 | if (push_update_refs_status(data, remote_refs, flags)) |
972 | return 1; | |
973 | ||
974 | if (data->export_marks) { | |
975 | strbuf_addf(&buf, "%s.tmp", data->export_marks); | |
976 | rename(buf.buf, data->export_marks); | |
977 | strbuf_release(&buf); | |
978 | } | |
979 | ||
980 | return 0; | |
73b49a75 SR |
981 | } |
982 | ||
983 | static int push_refs(struct transport *transport, | |
984 | struct ref *remote_refs, int flags) | |
985 | { | |
986 | struct helper_data *data = transport->data; | |
987 | ||
988 | if (process_connect(transport, 1)) { | |
989 | do_take_over(transport); | |
990 | return transport->push_refs(transport, remote_refs, flags); | |
991 | } | |
992 | ||
993 | if (!remote_refs) { | |
994 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
995 | "Perhaps you should specify a branch such as 'master'.\n"); | |
996 | return 0; | |
997 | } | |
998 | ||
999 | if (data->push) | |
1000 | return push_refs_with_push(transport, remote_refs, flags); | |
1001 | ||
1002 | if (data->export) | |
1003 | return push_refs_with_export(transport, remote_refs, flags); | |
1004 | ||
1005 | return -1; | |
1006 | } | |
1007 | ||
1008 | ||
f8ec9167 DB |
1009 | static int has_attribute(const char *attrs, const char *attr) { |
1010 | int len; | |
1011 | if (!attrs) | |
1012 | return 0; | |
1013 | ||
1014 | len = strlen(attr); | |
1015 | for (;;) { | |
1016 | const char *space = strchrnul(attrs, ' '); | |
1017 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
1018 | return 1; | |
1019 | if (!*space) | |
1020 | return 0; | |
1021 | attrs = space + 1; | |
1022 | } | |
1023 | } | |
1024 | ||
6eb996b5 DB |
1025 | static struct ref *get_refs_list(struct transport *transport, int for_push) |
1026 | { | |
292ce46b | 1027 | struct helper_data *data = transport->data; |
6eb996b5 DB |
1028 | struct child_process *helper; |
1029 | struct ref *ret = NULL; | |
1030 | struct ref **tail = &ret; | |
1031 | struct ref *posn; | |
1032 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
1033 | |
1034 | helper = get_helper(transport); | |
2d14d65c | 1035 | |
fa8c097c IL |
1036 | if (process_connect(transport, for_push)) { |
1037 | do_take_over(transport); | |
1038 | return transport->get_refs_list(transport, for_push); | |
1039 | } | |
1040 | ||
ae4efe19 SP |
1041 | if (data->push && for_push) |
1042 | write_str_in_full(helper->in, "list for-push\n"); | |
1043 | else | |
1044 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 1045 | |
6eb996b5 DB |
1046 | while (1) { |
1047 | char *eov, *eon; | |
5931b33e FC |
1048 | if (recvline(data, &buf)) |
1049 | exit(128); | |
6eb996b5 DB |
1050 | |
1051 | if (!*buf.buf) | |
1052 | break; | |
1053 | ||
1054 | eov = strchr(buf.buf, ' '); | |
1055 | if (!eov) | |
1056 | die("Malformed response in ref list: %s", buf.buf); | |
1057 | eon = strchr(eov + 1, ' '); | |
1058 | *eov = '\0'; | |
1059 | if (eon) | |
1060 | *eon = '\0'; | |
1061 | *tail = alloc_ref(eov + 1); | |
1062 | if (buf.buf[0] == '@') | |
1063 | (*tail)->symref = xstrdup(buf.buf + 1); | |
1064 | else if (buf.buf[0] != '?') | |
f4e54d02 | 1065 | get_oid_hex(buf.buf, &(*tail)->old_oid); |
f8ec9167 DB |
1066 | if (eon) { |
1067 | if (has_attribute(eon + 1, "unchanged")) { | |
1068 | (*tail)->status |= REF_STATUS_UPTODATE; | |
ae25fd39 | 1069 | if (read_ref((*tail)->name, |
f4e54d02 | 1070 | (*tail)->old_oid.hash) < 0) |
3c5077fe | 1071 | die(_("Could not read ref %s"), |
ae25fd39 | 1072 | (*tail)->name); |
f8ec9167 DB |
1073 | } |
1074 | } | |
6eb996b5 DB |
1075 | tail = &((*tail)->next); |
1076 | } | |
bf3c523c IL |
1077 | if (debug) |
1078 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
1079 | strbuf_release(&buf); |
1080 | ||
1081 | for (posn = ret; posn; posn = posn->next) | |
1082 | resolve_remote_symref(posn, ret); | |
1083 | ||
1084 | return ret; | |
1085 | } | |
1086 | ||
c9e388bb | 1087 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 | 1088 | { |
92e25b6b | 1089 | struct helper_data *data = xcalloc(1, sizeof(*data)); |
c9e388bb | 1090 | data->name = name; |
6eb996b5 | 1091 | |
a5adaced JK |
1092 | transport_check_allowed(name); |
1093 | ||
bf3c523c IL |
1094 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
1095 | debug = 1; | |
1096 | ||
6eb996b5 | 1097 | transport->data = data; |
ef08ef9e | 1098 | transport->set_option = set_helper_option; |
6eb996b5 DB |
1099 | transport->get_refs_list = get_refs_list; |
1100 | transport->fetch = fetch; | |
ae4efe19 | 1101 | transport->push_refs = push_refs; |
f2a37151 | 1102 | transport->disconnect = release_helper; |
b236752a | 1103 | transport->connect = connect_helper; |
61b075bd | 1104 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
1105 | return 0; |
1106 | } | |
419f37db IL |
1107 | |
1108 | /* | |
1109 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
1110 | * buffer less), so attempt reads and writes with up to that size. | |
1111 | */ | |
1112 | #define BUFFERSIZE 65536 | |
1113 | /* This should be enough to hold debugging message. */ | |
1114 | #define PBUFFERSIZE 8192 | |
1115 | ||
1116 | /* Print bidirectional transfer loop debug message. */ | |
4621085b | 1117 | __attribute__((format (printf, 1, 2))) |
419f37db IL |
1118 | static void transfer_debug(const char *fmt, ...) |
1119 | { | |
6cdf8a79 MÅ |
1120 | /* |
1121 | * NEEDSWORK: This function is sometimes used from multiple threads, and | |
1122 | * we end up using debug_enabled racily. That "should not matter" since | |
1123 | * we always write the same value, but it's still wrong. This function | |
1124 | * is listed in .tsan-suppressions for the time being. | |
1125 | */ | |
1126 | ||
419f37db IL |
1127 | va_list args; |
1128 | char msgbuf[PBUFFERSIZE]; | |
1129 | static int debug_enabled = -1; | |
1130 | ||
1131 | if (debug_enabled < 0) | |
1132 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
1133 | if (!debug_enabled) | |
1134 | return; | |
1135 | ||
1136 | va_start(args, fmt); | |
1137 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
1138 | va_end(args); | |
1139 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
1140 | } | |
1141 | ||
1142 | /* Stream state: More data may be coming in this direction. */ | |
2e3a16b2 | 1143 | #define SSTATE_TRANSFERRING 0 |
419f37db IL |
1144 | /* |
1145 | * Stream state: No more data coming in this direction, flushing rest of | |
1146 | * data. | |
1147 | */ | |
1148 | #define SSTATE_FLUSHING 1 | |
1149 | /* Stream state: Transfer in this direction finished. */ | |
1150 | #define SSTATE_FINISHED 2 | |
1151 | ||
2e3a16b2 | 1152 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING) |
419f37db IL |
1153 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) |
1154 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
1155 | ||
1156 | /* Unidirectional transfer. */ | |
1157 | struct unidirectional_transfer { | |
1158 | /* Source */ | |
1159 | int src; | |
1160 | /* Destination */ | |
1161 | int dest; | |
1162 | /* Is source socket? */ | |
1163 | int src_is_sock; | |
1164 | /* Is destination socket? */ | |
1165 | int dest_is_sock; | |
41ccfdd9 | 1166 | /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */ |
419f37db IL |
1167 | int state; |
1168 | /* Buffer. */ | |
1169 | char buf[BUFFERSIZE]; | |
1170 | /* Buffer used. */ | |
1171 | size_t bufuse; | |
1172 | /* Name of source. */ | |
1173 | const char *src_name; | |
1174 | /* Name of destination. */ | |
1175 | const char *dest_name; | |
1176 | }; | |
1177 | ||
1178 | /* Closes the target (for writing) if transfer has finished. */ | |
1179 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
1180 | { | |
1181 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
1182 | t->state = SSTATE_FINISHED; | |
1183 | if (t->dest_is_sock) | |
1184 | shutdown(t->dest, SHUT_WR); | |
1185 | else | |
1186 | close(t->dest); | |
1187 | transfer_debug("Closed %s.", t->dest_name); | |
1188 | } | |
1189 | } | |
1190 | ||
1191 | /* | |
832c0e5e | 1192 | * Tries to read data from source into buffer. If buffer is full, |
419f37db IL |
1193 | * no data is read. Returns 0 on success, -1 on error. |
1194 | */ | |
1195 | static int udt_do_read(struct unidirectional_transfer *t) | |
1196 | { | |
1197 | ssize_t bytes; | |
1198 | ||
1199 | if (t->bufuse == BUFFERSIZE) | |
1200 | return 0; /* No space for more. */ | |
1201 | ||
1202 | transfer_debug("%s is readable", t->src_name); | |
1203 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
1204 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1205 | errno != EINTR) { | |
1fee1dce | 1206 | error_errno("read(%s) failed", t->src_name); |
419f37db IL |
1207 | return -1; |
1208 | } else if (bytes == 0) { | |
1209 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
4621085b | 1210 | t->src_name, (int)t->bufuse); |
419f37db IL |
1211 | t->state = SSTATE_FLUSHING; |
1212 | } else if (bytes > 0) { | |
1213 | t->bufuse += bytes; | |
1214 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
1215 | (int)bytes, t->src_name, (int)t->bufuse); | |
1216 | } | |
1217 | return 0; | |
1218 | } | |
1219 | ||
1220 | /* Tries to write data from buffer into destination. If buffer is empty, | |
1221 | * no data is written. Returns 0 on success, -1 on error. | |
1222 | */ | |
1223 | static int udt_do_write(struct unidirectional_transfer *t) | |
1224 | { | |
803dbdb9 | 1225 | ssize_t bytes; |
419f37db IL |
1226 | |
1227 | if (t->bufuse == 0) | |
1228 | return 0; /* Nothing to write. */ | |
1229 | ||
1230 | transfer_debug("%s is writable", t->dest_name); | |
7edc02f4 EFL |
1231 | bytes = xwrite(t->dest, t->buf, t->bufuse); |
1232 | if (bytes < 0 && errno != EWOULDBLOCK) { | |
1fee1dce | 1233 | error_errno("write(%s) failed", t->dest_name); |
419f37db IL |
1234 | return -1; |
1235 | } else if (bytes > 0) { | |
1236 | t->bufuse -= bytes; | |
1237 | if (t->bufuse) | |
1238 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1239 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1240 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1241 | } | |
1242 | return 0; | |
1243 | } | |
1244 | ||
1245 | ||
1246 | /* State of bidirectional transfer loop. */ | |
1247 | struct bidirectional_transfer_state { | |
1248 | /* Direction from program to git. */ | |
1249 | struct unidirectional_transfer ptg; | |
1250 | /* Direction from git to program. */ | |
1251 | struct unidirectional_transfer gtp; | |
1252 | }; | |
1253 | ||
1254 | static void *udt_copy_task_routine(void *udt) | |
1255 | { | |
1256 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1257 | while (t->state != SSTATE_FINISHED) { | |
1258 | if (STATE_NEEDS_READING(t->state)) | |
1259 | if (udt_do_read(t)) | |
1260 | return NULL; | |
1261 | if (STATE_NEEDS_WRITING(t->state)) | |
1262 | if (udt_do_write(t)) | |
1263 | return NULL; | |
1264 | if (STATE_NEEDS_CLOSING(t->state)) | |
1265 | udt_close_if_finished(t); | |
1266 | } | |
1267 | return udt; /* Just some non-NULL value. */ | |
1268 | } | |
1269 | ||
1270 | #ifndef NO_PTHREADS | |
1271 | ||
1272 | /* | |
98e023de | 1273 | * Join thread, with appropriate errors on failure. Name is name for the |
419f37db IL |
1274 | * thread (for error messages). Returns 0 on success, 1 on failure. |
1275 | */ | |
1276 | static int tloop_join(pthread_t thread, const char *name) | |
1277 | { | |
1278 | int err; | |
1279 | void *tret; | |
1280 | err = pthread_join(thread, &tret); | |
1281 | if (!tret) { | |
1282 | error("%s thread failed", name); | |
1283 | return 1; | |
1284 | } | |
1285 | if (err) { | |
1286 | error("%s thread failed to join: %s", name, strerror(err)); | |
1287 | return 1; | |
1288 | } | |
1289 | return 0; | |
1290 | } | |
1291 | ||
1292 | /* | |
1293 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1294 | * -1 on failure. | |
1295 | */ | |
1296 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1297 | { | |
1298 | pthread_t gtp_thread; | |
1299 | pthread_t ptg_thread; | |
1300 | int err; | |
1301 | int ret = 0; | |
1302 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1303 | &s->gtp); | |
1304 | if (err) | |
1305 | die("Can't start thread for copying data: %s", strerror(err)); | |
1306 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, | |
1307 | &s->ptg); | |
1308 | if (err) | |
1309 | die("Can't start thread for copying data: %s", strerror(err)); | |
1310 | ||
1311 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1312 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1313 | return ret; | |
1314 | } | |
1315 | #else | |
1316 | ||
1317 | /* Close the source and target (for writing) for transfer. */ | |
1318 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1319 | { | |
1320 | t->state = SSTATE_FINISHED; | |
1321 | /* | |
1322 | * Socket read end left open isn't a disaster if nobody | |
1323 | * attempts to read from it (mingw compat headers do not | |
1324 | * have SHUT_RD)... | |
1325 | * | |
1326 | * We can't fully close the socket since otherwise gtp | |
1327 | * task would first close the socket it sends data to | |
1328 | * while closing the ptg file descriptors. | |
1329 | */ | |
1330 | if (!t->src_is_sock) | |
1331 | close(t->src); | |
1332 | if (t->dest_is_sock) | |
1333 | shutdown(t->dest, SHUT_WR); | |
1334 | else | |
1335 | close(t->dest); | |
1336 | } | |
1337 | ||
1338 | /* | |
98e023de | 1339 | * Join process, with appropriate errors on failure. Name is name for the |
419f37db IL |
1340 | * process (for error messages). Returns 0 on success, 1 on failure. |
1341 | */ | |
1342 | static int tloop_join(pid_t pid, const char *name) | |
1343 | { | |
1344 | int tret; | |
1345 | if (waitpid(pid, &tret, 0) < 0) { | |
1fee1dce | 1346 | error_errno("%s process failed to wait", name); |
419f37db IL |
1347 | return 1; |
1348 | } | |
1349 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
1350 | error("%s process failed", name); | |
1351 | return 1; | |
1352 | } | |
1353 | return 0; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1358 | * -1 on failure. | |
1359 | */ | |
1360 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1361 | { | |
1362 | pid_t pid1, pid2; | |
1363 | int ret = 0; | |
1364 | ||
1365 | /* Fork thread #1: git to program. */ | |
1366 | pid1 = fork(); | |
1367 | if (pid1 < 0) | |
1368 | die_errno("Can't start thread for copying data"); | |
1369 | else if (pid1 == 0) { | |
1370 | udt_kill_transfer(&s->ptg); | |
1371 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1372 | } | |
1373 | ||
1374 | /* Fork thread #2: program to git. */ | |
1375 | pid2 = fork(); | |
1376 | if (pid2 < 0) | |
1377 | die_errno("Can't start thread for copying data"); | |
1378 | else if (pid2 == 0) { | |
1379 | udt_kill_transfer(&s->gtp); | |
1380 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1381 | } | |
1382 | ||
1383 | /* | |
1384 | * Close both streams in parent as to not interfere with | |
1385 | * end of file detection and wait for both tasks to finish. | |
1386 | */ | |
1387 | udt_kill_transfer(&s->gtp); | |
1388 | udt_kill_transfer(&s->ptg); | |
1389 | ret |= tloop_join(pid1, "Git to program copy"); | |
1390 | ret |= tloop_join(pid2, "Program to git copy"); | |
1391 | return ret; | |
1392 | } | |
1393 | #endif | |
1394 | ||
1395 | /* | |
1396 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1397 | * Additionally filtering through given filter. If filter is NULL, uses | |
1398 | * identity filter. | |
1399 | */ | |
1400 | int bidirectional_transfer_loop(int input, int output) | |
1401 | { | |
1402 | struct bidirectional_transfer_state state; | |
1403 | ||
1404 | /* Fill the state fields. */ | |
1405 | state.ptg.src = input; | |
1406 | state.ptg.dest = 1; | |
1407 | state.ptg.src_is_sock = (input == output); | |
1408 | state.ptg.dest_is_sock = 0; | |
2e3a16b2 | 1409 | state.ptg.state = SSTATE_TRANSFERRING; |
419f37db IL |
1410 | state.ptg.bufuse = 0; |
1411 | state.ptg.src_name = "remote input"; | |
1412 | state.ptg.dest_name = "stdout"; | |
1413 | ||
1414 | state.gtp.src = 0; | |
1415 | state.gtp.dest = output; | |
1416 | state.gtp.src_is_sock = 0; | |
1417 | state.gtp.dest_is_sock = (input == output); | |
2e3a16b2 | 1418 | state.gtp.state = SSTATE_TRANSFERRING; |
419f37db IL |
1419 | state.gtp.bufuse = 0; |
1420 | state.gtp.src_name = "stdin"; | |
1421 | state.gtp.dest_name = "remote output"; | |
1422 | ||
1423 | return tloop_spawnwait_tasks(&state); | |
1424 | } |