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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); | |
47 | if (write_in_full(helper->helper->in, buffer->buf, buffer->len) | |
48 | != buffer->len) | |
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); | |
77 | if (write_in_full(fd, str, strlen(str)) != strlen(str)) | |
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 | |
a9154590 RS |
127 | argv_array_pushf(&helper->env_array, "%s=%s", GIT_DIR_ENVIRONMENT, |
128 | 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); |
6eb996b5 DB |
244 | free(data->helper); |
245 | data->helper = NULL; | |
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, |
ef08ef9e SP |
261 | }; |
262 | ||
263 | static int set_helper_option(struct transport *transport, | |
264 | const char *name, const char *value) | |
265 | { | |
266 | struct helper_data *data = transport->data; | |
ef08ef9e SP |
267 | struct strbuf buf = STRBUF_INIT; |
268 | int i, ret, is_bool = 0; | |
269 | ||
bf3c523c IL |
270 | get_helper(transport); |
271 | ||
ef08ef9e SP |
272 | if (!data->option) |
273 | return 1; | |
274 | ||
275 | for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) { | |
276 | if (!strcmp(name, unsupported_options[i])) | |
277 | return 1; | |
278 | } | |
279 | ||
280 | for (i = 0; i < ARRAY_SIZE(boolean_options); i++) { | |
281 | if (!strcmp(name, boolean_options[i])) { | |
282 | is_bool = 1; | |
283 | break; | |
284 | } | |
285 | } | |
286 | ||
287 | strbuf_addf(&buf, "option %s ", name); | |
288 | if (is_bool) | |
289 | strbuf_addstr(&buf, value ? "true" : "false"); | |
290 | else | |
291 | quote_c_style(value, &buf, NULL, 0); | |
292 | strbuf_addch(&buf, '\n'); | |
293 | ||
4a1b59c8 | 294 | sendline(data, &buf); |
5931b33e FC |
295 | if (recvline(data, &buf)) |
296 | exit(128); | |
ef08ef9e SP |
297 | |
298 | if (!strcmp(buf.buf, "ok")) | |
299 | ret = 0; | |
59556548 | 300 | else if (starts_with(buf.buf, "error")) { |
ef08ef9e SP |
301 | ret = -1; |
302 | } else if (!strcmp(buf.buf, "unsupported")) | |
303 | ret = 1; | |
304 | else { | |
305 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
306 | ret = 1; | |
307 | } | |
308 | strbuf_release(&buf); | |
309 | return ret; | |
310 | } | |
311 | ||
312 | static void standard_options(struct transport *t) | |
313 | { | |
314 | char buf[16]; | |
315 | int n; | |
316 | int v = t->verbose; | |
ef08ef9e | 317 | |
d01b3c02 | 318 | set_helper_option(t, "progress", t->progress ? "true" : "false"); |
ef08ef9e SP |
319 | |
320 | n = snprintf(buf, sizeof(buf), "%d", v + 1); | |
321 | if (n >= sizeof(buf)) | |
322 | die("impossibly large verbosity value"); | |
323 | set_helper_option(t, "verbosity", buf); | |
c915f11e EW |
324 | |
325 | switch (t->family) { | |
326 | case TRANSPORT_FAMILY_ALL: | |
327 | /* | |
328 | * this is already the default, | |
329 | * do not break old remote helpers by setting "all" here | |
330 | */ | |
331 | break; | |
332 | case TRANSPORT_FAMILY_IPV4: | |
333 | set_helper_option(t, "family", "ipv4"); | |
334 | break; | |
335 | case TRANSPORT_FAMILY_IPV6: | |
336 | set_helper_option(t, "family", "ipv6"); | |
337 | break; | |
338 | } | |
ef08ef9e SP |
339 | } |
340 | ||
f2a37151 DB |
341 | static int release_helper(struct transport *transport) |
342 | { | |
cc567322 | 343 | int res = 0; |
72ff8943 DB |
344 | struct helper_data *data = transport->data; |
345 | free_refspec(data->refspec_nr, data->refspecs); | |
346 | data->refspecs = NULL; | |
cc567322 | 347 | res = disconnect_helper(transport); |
f2a37151 | 348 | free(transport->data); |
cc567322 | 349 | return res; |
f2a37151 DB |
350 | } |
351 | ||
6eb996b5 | 352 | static int fetch_with_fetch(struct transport *transport, |
37148311 | 353 | int nr_heads, struct ref **to_fetch) |
6eb996b5 | 354 | { |
292ce46b | 355 | struct helper_data *data = transport->data; |
6eb996b5 DB |
356 | int i; |
357 | struct strbuf buf = STRBUF_INIT; | |
358 | ||
359 | for (i = 0; i < nr_heads; i++) { | |
1088261f | 360 | const struct ref *posn = to_fetch[i]; |
6eb996b5 DB |
361 | if (posn->status & REF_STATUS_UPTODATE) |
362 | continue; | |
2d14d65c DB |
363 | |
364 | strbuf_addf(&buf, "fetch %s %s\n", | |
f4e54d02 | 365 | oid_to_hex(&posn->old_oid), |
33cae542 | 366 | posn->symref ? posn->symref : posn->name); |
292ce46b | 367 | } |
2d14d65c | 368 | |
292ce46b | 369 | strbuf_addch(&buf, '\n'); |
bf3c523c | 370 | sendline(data, &buf); |
292ce46b SP |
371 | |
372 | while (1) { | |
5931b33e FC |
373 | if (recvline(data, &buf)) |
374 | exit(128); | |
292ce46b | 375 | |
59556548 | 376 | if (starts_with(buf.buf, "lock ")) { |
292ce46b SP |
377 | const char *name = buf.buf + 5; |
378 | if (transport->pack_lockfile) | |
379 | warning("%s also locked %s", data->name, name); | |
380 | else | |
381 | transport->pack_lockfile = xstrdup(name); | |
382 | } | |
9ba38048 NTND |
383 | else if (data->check_connectivity && |
384 | data->transport_options.check_self_contained_and_connected && | |
385 | !strcmp(buf.buf, "connectivity-ok")) | |
386 | data->transport_options.self_contained_and_connected = 1; | |
292ce46b SP |
387 | else if (!buf.len) |
388 | break; | |
389 | else | |
390 | warning("%s unexpectedly said: '%s'", data->name, buf.buf); | |
6eb996b5 | 391 | } |
292ce46b | 392 | strbuf_release(&buf); |
6eb996b5 DB |
393 | return 0; |
394 | } | |
395 | ||
e65e91ed DB |
396 | static int get_importer(struct transport *transport, struct child_process *fastimport) |
397 | { | |
398 | struct child_process *helper = get_helper(transport); | |
bfc366d9 | 399 | struct helper_data *data = transport->data; |
bfc366d9 | 400 | int cat_blob_fd, code; |
483bbd4e | 401 | child_process_init(fastimport); |
e65e91ed | 402 | fastimport->in = helper->out; |
173fd1a1 JK |
403 | argv_array_push(&fastimport->args, "fast-import"); |
404 | argv_array_push(&fastimport->args, debug ? "--stats" : "--quiet"); | |
e65e91ed | 405 | |
bfc366d9 FA |
406 | if (data->bidi_import) { |
407 | cat_blob_fd = xdup(helper->in); | |
173fd1a1 | 408 | argv_array_pushf(&fastimport->args, "--cat-blob-fd=%d", cat_blob_fd); |
bfc366d9 | 409 | } |
e65e91ed | 410 | fastimport->git_cmd = 1; |
bfc366d9 FA |
411 | |
412 | code = start_command(fastimport); | |
413 | return code; | |
e65e91ed DB |
414 | } |
415 | ||
73b49a75 SR |
416 | static int get_exporter(struct transport *transport, |
417 | struct child_process *fastexport, | |
73b49a75 SR |
418 | struct string_list *revlist_args) |
419 | { | |
a515ebe9 | 420 | struct helper_data *data = transport->data; |
73b49a75 | 421 | struct child_process *helper = get_helper(transport); |
2aeae40a | 422 | int i; |
852e54bc | 423 | |
8828f298 | 424 | child_process_init(fastexport); |
73b49a75 SR |
425 | |
426 | /* we need to duplicate helper->in because we want to use it after | |
427 | * fastexport is done with it. */ | |
428 | fastexport->out = dup(helper->in); | |
2aeae40a JK |
429 | argv_array_push(&fastexport->args, "fast-export"); |
430 | argv_array_push(&fastexport->args, "--use-done-feature"); | |
431 | argv_array_push(&fastexport->args, data->signed_tags ? | |
432 | "--signed-tags=verbatim" : "--signed-tags=warn-strip"); | |
433 | if (data->export_marks) | |
434 | argv_array_pushf(&fastexport->args, "--export-marks=%s.tmp", data->export_marks); | |
435 | if (data->import_marks) | |
436 | argv_array_pushf(&fastexport->args, "--import-marks=%s", data->import_marks); | |
73b49a75 SR |
437 | |
438 | for (i = 0; i < revlist_args->nr; i++) | |
2aeae40a | 439 | argv_array_push(&fastexport->args, revlist_args->items[i].string); |
73b49a75 SR |
440 | |
441 | fastexport->git_cmd = 1; | |
442 | return start_command(fastexport); | |
443 | } | |
444 | ||
e65e91ed DB |
445 | static int fetch_with_import(struct transport *transport, |
446 | int nr_heads, struct ref **to_fetch) | |
447 | { | |
448 | struct child_process fastimport; | |
72ff8943 | 449 | struct helper_data *data = transport->data; |
e65e91ed DB |
450 | int i; |
451 | struct ref *posn; | |
452 | struct strbuf buf = STRBUF_INIT; | |
453 | ||
bf3c523c IL |
454 | get_helper(transport); |
455 | ||
e65e91ed DB |
456 | if (get_importer(transport, &fastimport)) |
457 | die("Couldn't run fast-import"); | |
458 | ||
459 | for (i = 0; i < nr_heads; i++) { | |
460 | posn = to_fetch[i]; | |
461 | if (posn->status & REF_STATUS_UPTODATE) | |
462 | continue; | |
463 | ||
33cae542 MH |
464 | strbuf_addf(&buf, "import %s\n", |
465 | posn->symref ? posn->symref : posn->name); | |
bf3c523c | 466 | sendline(data, &buf); |
e65e91ed DB |
467 | strbuf_reset(&buf); |
468 | } | |
9504bc9d SR |
469 | |
470 | write_constant(data->helper->in, "\n"); | |
bfc366d9 FA |
471 | /* |
472 | * remote-helpers that advertise the bidi-import capability are required to | |
473 | * buffer the complete batch of import commands until this newline before | |
474 | * sending data to fast-import. | |
475 | * These helpers read back data from fast-import on their stdin, which could | |
476 | * be mixed with import commands, otherwise. | |
477 | */ | |
9504bc9d | 478 | |
cc567322 SR |
479 | if (finish_command(&fastimport)) |
480 | die("Error while running fast-import"); | |
e65e91ed | 481 | |
dff9d65d FA |
482 | /* |
483 | * The fast-import stream of a remote helper that advertises | |
484 | * the "refspec" capability writes to the refs named after the | |
485 | * right hand side of the first refspec matching each ref we | |
486 | * were fetching. | |
487 | * | |
488 | * (If no "refspec" capability was specified, for historical | |
7a43c554 | 489 | * reasons we default to the equivalent of *:*.) |
dff9d65d FA |
490 | * |
491 | * Store the result in to_fetch[i].old_sha1. Callers such | |
492 | * as "git fetch" can use the value to write feedback to the | |
493 | * terminal, populate FETCH_HEAD, and determine what new value | |
494 | * should be written to peer_ref if the update is a | |
495 | * fast-forward or this is a forced update. | |
496 | */ | |
e65e91ed | 497 | for (i = 0; i < nr_heads; i++) { |
33cae542 | 498 | char *private, *name; |
e65e91ed DB |
499 | posn = to_fetch[i]; |
500 | if (posn->status & REF_STATUS_UPTODATE) | |
501 | continue; | |
33cae542 | 502 | name = posn->symref ? posn->symref : posn->name; |
72ff8943 | 503 | if (data->refspecs) |
33cae542 | 504 | private = apply_refspecs(data->refspecs, data->refspec_nr, name); |
72ff8943 | 505 | else |
33cae542 | 506 | private = xstrdup(name); |
d51b720f | 507 | if (private) { |
f4e54d02 | 508 | if (read_ref(private, posn->old_oid.hash) < 0) |
ae25fd39 | 509 | die("Could not read ref %s", private); |
d51b720f MH |
510 | free(private); |
511 | } | |
e65e91ed | 512 | } |
b962dbdc | 513 | strbuf_release(&buf); |
e65e91ed DB |
514 | return 0; |
515 | } | |
516 | ||
fa8c097c IL |
517 | static int process_connect_service(struct transport *transport, |
518 | const char *name, const char *exec) | |
519 | { | |
520 | struct helper_data *data = transport->data; | |
521 | struct strbuf cmdbuf = STRBUF_INIT; | |
522 | struct child_process *helper; | |
523 | int r, duped, ret = 0; | |
524 | FILE *input; | |
525 | ||
526 | helper = get_helper(transport); | |
527 | ||
528 | /* | |
529 | * Yes, dup the pipe another time, as we need unbuffered version | |
530 | * of input pipe as FILE*. fclose() closes the underlying fd and | |
531 | * stream buffering only can be changed before first I/O operation | |
532 | * on it. | |
533 | */ | |
534 | duped = dup(helper->out); | |
535 | if (duped < 0) | |
536 | die_errno("Can't dup helper output fd"); | |
537 | input = xfdopen(duped, "r"); | |
538 | setvbuf(input, NULL, _IONBF, 0); | |
539 | ||
540 | /* | |
541 | * Handle --upload-pack and friends. This is fire and forget... | |
542 | * just warn if it fails. | |
543 | */ | |
544 | if (strcmp(name, exec)) { | |
545 | r = set_helper_option(transport, "servpath", exec); | |
546 | if (r > 0) | |
547 | warning("Setting remote service path not supported by protocol."); | |
548 | else if (r < 0) | |
549 | warning("Invalid remote service path."); | |
550 | } | |
551 | ||
552 | if (data->connect) | |
553 | strbuf_addf(&cmdbuf, "connect %s\n", name); | |
554 | else | |
555 | goto exit; | |
556 | ||
557 | sendline(data, &cmdbuf); | |
5931b33e FC |
558 | if (recvline_fh(input, &cmdbuf, name)) |
559 | exit(128); | |
560 | ||
fa8c097c IL |
561 | if (!strcmp(cmdbuf.buf, "")) { |
562 | data->no_disconnect_req = 1; | |
563 | if (debug) | |
564 | fprintf(stderr, "Debug: Smart transport connection " | |
565 | "ready.\n"); | |
566 | ret = 1; | |
567 | } else if (!strcmp(cmdbuf.buf, "fallback")) { | |
568 | if (debug) | |
569 | fprintf(stderr, "Debug: Falling back to dumb " | |
570 | "transport.\n"); | |
571 | } else | |
572 | die("Unknown response to connect: %s", | |
573 | cmdbuf.buf); | |
574 | ||
575 | exit: | |
576 | fclose(input); | |
577 | return ret; | |
578 | } | |
579 | ||
580 | static int process_connect(struct transport *transport, | |
581 | int for_push) | |
582 | { | |
583 | struct helper_data *data = transport->data; | |
584 | const char *name; | |
585 | const char *exec; | |
586 | ||
587 | name = for_push ? "git-receive-pack" : "git-upload-pack"; | |
588 | if (for_push) | |
589 | exec = data->transport_options.receivepack; | |
590 | else | |
591 | exec = data->transport_options.uploadpack; | |
592 | ||
593 | return process_connect_service(transport, name, exec); | |
594 | } | |
595 | ||
b236752a IL |
596 | static int connect_helper(struct transport *transport, const char *name, |
597 | const char *exec, int fd[2]) | |
598 | { | |
599 | struct helper_data *data = transport->data; | |
600 | ||
601 | /* Get_helper so connect is inited. */ | |
602 | get_helper(transport); | |
603 | if (!data->connect) | |
604 | die("Operation not supported by protocol."); | |
605 | ||
606 | if (!process_connect_service(transport, name, exec)) | |
607 | die("Can't connect to subservice %s.", name); | |
608 | ||
609 | fd[0] = data->helper->out; | |
610 | fd[1] = data->helper->in; | |
611 | return 0; | |
612 | } | |
613 | ||
6eb996b5 | 614 | static int fetch(struct transport *transport, |
37148311 | 615 | int nr_heads, struct ref **to_fetch) |
6eb996b5 DB |
616 | { |
617 | struct helper_data *data = transport->data; | |
618 | int i, count; | |
619 | ||
fa8c097c IL |
620 | if (process_connect(transport, 0)) { |
621 | do_take_over(transport); | |
622 | return transport->fetch(transport, nr_heads, to_fetch); | |
623 | } | |
624 | ||
6eb996b5 DB |
625 | count = 0; |
626 | for (i = 0; i < nr_heads; i++) | |
627 | if (!(to_fetch[i]->status & REF_STATUS_UPTODATE)) | |
628 | count++; | |
629 | ||
630 | if (!count) | |
631 | return 0; | |
632 | ||
aab1beb0 MH |
633 | if (data->check_connectivity && |
634 | data->transport_options.check_self_contained_and_connected) | |
635 | set_helper_option(transport, "check-connectivity", "true"); | |
636 | ||
637 | if (transport->cloning) | |
638 | set_helper_option(transport, "cloning", "true"); | |
639 | ||
640 | if (data->transport_options.update_shallow) | |
641 | set_helper_option(transport, "update-shallow", "true"); | |
642 | ||
6eb996b5 DB |
643 | if (data->fetch) |
644 | return fetch_with_fetch(transport, nr_heads, to_fetch); | |
645 | ||
e65e91ed DB |
646 | if (data->import) |
647 | return fetch_with_import(transport, nr_heads, to_fetch); | |
648 | ||
6eb996b5 DB |
649 | return -1; |
650 | } | |
651 | ||
664059fb | 652 | static int push_update_ref_status(struct strbuf *buf, |
d2e73c6f SR |
653 | struct ref **ref, |
654 | struct ref *remote_refs) | |
655 | { | |
656 | char *refname, *msg; | |
f9e3c6be | 657 | int status, forced = 0; |
d2e73c6f | 658 | |
59556548 | 659 | if (starts_with(buf->buf, "ok ")) { |
d2e73c6f SR |
660 | status = REF_STATUS_OK; |
661 | refname = buf->buf + 3; | |
59556548 | 662 | } else if (starts_with(buf->buf, "error ")) { |
d2e73c6f SR |
663 | status = REF_STATUS_REMOTE_REJECT; |
664 | refname = buf->buf + 6; | |
665 | } else | |
82247e9b | 666 | die("expected ok/error, helper said '%s'", buf->buf); |
d2e73c6f SR |
667 | |
668 | msg = strchr(refname, ' '); | |
669 | if (msg) { | |
670 | struct strbuf msg_buf = STRBUF_INIT; | |
671 | const char *end; | |
672 | ||
673 | *msg++ = '\0'; | |
674 | if (!unquote_c_style(&msg_buf, msg, &end)) | |
675 | msg = strbuf_detach(&msg_buf, NULL); | |
676 | else | |
677 | msg = xstrdup(msg); | |
678 | strbuf_release(&msg_buf); | |
679 | ||
680 | if (!strcmp(msg, "no match")) { | |
681 | status = REF_STATUS_NONE; | |
682 | free(msg); | |
683 | msg = NULL; | |
684 | } | |
685 | else if (!strcmp(msg, "up to date")) { | |
686 | status = REF_STATUS_UPTODATE; | |
687 | free(msg); | |
688 | msg = NULL; | |
689 | } | |
690 | else if (!strcmp(msg, "non-fast forward")) { | |
691 | status = REF_STATUS_REJECT_NONFASTFORWARD; | |
692 | free(msg); | |
693 | msg = NULL; | |
694 | } | |
dbfeddb1 CR |
695 | else if (!strcmp(msg, "already exists")) { |
696 | status = REF_STATUS_REJECT_ALREADY_EXISTS; | |
697 | free(msg); | |
698 | msg = NULL; | |
699 | } | |
75e5c0dc JH |
700 | else if (!strcmp(msg, "fetch first")) { |
701 | status = REF_STATUS_REJECT_FETCH_FIRST; | |
702 | free(msg); | |
703 | msg = NULL; | |
704 | } | |
705 | else if (!strcmp(msg, "needs force")) { | |
706 | status = REF_STATUS_REJECT_NEEDS_FORCE; | |
707 | free(msg); | |
708 | msg = NULL; | |
709 | } | |
631b5ef2 JH |
710 | else if (!strcmp(msg, "stale info")) { |
711 | status = REF_STATUS_REJECT_STALE; | |
712 | free(msg); | |
713 | msg = NULL; | |
714 | } | |
f9e3c6be FC |
715 | else if (!strcmp(msg, "forced update")) { |
716 | forced = 1; | |
717 | free(msg); | |
718 | msg = NULL; | |
719 | } | |
d2e73c6f SR |
720 | } |
721 | ||
722 | if (*ref) | |
723 | *ref = find_ref_by_name(*ref, refname); | |
724 | if (!*ref) | |
725 | *ref = find_ref_by_name(remote_refs, refname); | |
726 | if (!*ref) { | |
727 | warning("helper reported unexpected status of %s", refname); | |
664059fb | 728 | return 1; |
d2e73c6f SR |
729 | } |
730 | ||
731 | if ((*ref)->status != REF_STATUS_NONE) { | |
732 | /* | |
733 | * Earlier, the ref was marked not to be pushed, so ignore the ref | |
734 | * status reported by the remote helper if the latter is 'no match'. | |
735 | */ | |
736 | if (status == REF_STATUS_NONE) | |
664059fb | 737 | return 1; |
d2e73c6f SR |
738 | } |
739 | ||
740 | (*ref)->status = status; | |
cf31f70c | 741 | (*ref)->forced_update |= forced; |
d2e73c6f | 742 | (*ref)->remote_status = msg; |
126aac5c | 743 | return !(status == REF_STATUS_OK); |
d2e73c6f SR |
744 | } |
745 | ||
0551a06c | 746 | static int push_update_refs_status(struct helper_data *data, |
5a75353f FC |
747 | struct ref *remote_refs, |
748 | int flags) | |
d2e73c6f SR |
749 | { |
750 | struct strbuf buf = STRBUF_INIT; | |
751 | struct ref *ref = remote_refs; | |
0551a06c FC |
752 | int ret = 0; |
753 | ||
d2e73c6f | 754 | for (;;) { |
664059fb FC |
755 | char *private; |
756 | ||
0551a06c FC |
757 | if (recvline(data, &buf)) { |
758 | ret = 1; | |
759 | break; | |
760 | } | |
761 | ||
d2e73c6f SR |
762 | if (!buf.len) |
763 | break; | |
764 | ||
664059fb FC |
765 | if (push_update_ref_status(&buf, &ref, remote_refs)) |
766 | continue; | |
767 | ||
5a75353f | 768 | if (flags & TRANSPORT_PUSH_DRY_RUN || !data->refspecs || data->no_private_update) |
664059fb FC |
769 | continue; |
770 | ||
771 | /* propagate back the update to the remote namespace */ | |
772 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); | |
773 | if (!private) | |
774 | continue; | |
f4e54d02 | 775 | update_ref("update by helper", private, ref->new_oid.hash, NULL, 0, 0); |
664059fb | 776 | free(private); |
d2e73c6f SR |
777 | } |
778 | strbuf_release(&buf); | |
0551a06c | 779 | return ret; |
d2e73c6f SR |
780 | } |
781 | ||
30261094 DB |
782 | static void set_common_push_options(struct transport *transport, |
783 | const char *name, int flags) | |
784 | { | |
785 | if (flags & TRANSPORT_PUSH_DRY_RUN) { | |
786 | if (set_helper_option(transport, "dry-run", "true") != 0) | |
787 | die("helper %s does not support dry-run", name); | |
788 | } else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) { | |
789 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0) | |
790 | die("helper %s does not support --signed", name); | |
791 | } else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) { | |
792 | if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0) | |
793 | die("helper %s does not support --signed=if-asked", name); | |
794 | } | |
795 | } | |
796 | ||
73b49a75 | 797 | static int push_refs_with_push(struct transport *transport, |
05c1eb10 | 798 | struct ref *remote_refs, int flags) |
ae4efe19 SP |
799 | { |
800 | int force_all = flags & TRANSPORT_PUSH_FORCE; | |
801 | int mirror = flags & TRANSPORT_PUSH_MIRROR; | |
802 | struct helper_data *data = transport->data; | |
803 | struct strbuf buf = STRBUF_INIT; | |
ae4efe19 | 804 | struct ref *ref; |
05c1eb10 JH |
805 | struct string_list cas_options = STRING_LIST_INIT_DUP; |
806 | struct string_list_item *cas_option; | |
ae4efe19 | 807 | |
c0aa335c | 808 | get_helper(transport); |
ae4efe19 SP |
809 | if (!data->push) |
810 | return 1; | |
811 | ||
812 | for (ref = remote_refs; ref; ref = ref->next) { | |
20e8b465 | 813 | if (!ref->peer_ref && !mirror) |
ae4efe19 SP |
814 | continue; |
815 | ||
20e8b465 TRC |
816 | /* Check for statuses set by set_ref_status_for_push() */ |
817 | switch (ref->status) { | |
818 | case REF_STATUS_REJECT_NONFASTFORWARD: | |
631b5ef2 | 819 | case REF_STATUS_REJECT_STALE: |
dbfeddb1 | 820 | case REF_STATUS_REJECT_ALREADY_EXISTS: |
20e8b465 | 821 | case REF_STATUS_UPTODATE: |
ae4efe19 | 822 | continue; |
20e8b465 TRC |
823 | default: |
824 | ; /* do nothing */ | |
ae4efe19 SP |
825 | } |
826 | ||
827 | if (force_all) | |
828 | ref->force = 1; | |
829 | ||
830 | strbuf_addstr(&buf, "push "); | |
831 | if (!ref->deletion) { | |
832 | if (ref->force) | |
833 | strbuf_addch(&buf, '+'); | |
834 | if (ref->peer_ref) | |
835 | strbuf_addstr(&buf, ref->peer_ref->name); | |
836 | else | |
f4e54d02 | 837 | strbuf_addstr(&buf, oid_to_hex(&ref->new_oid)); |
ae4efe19 SP |
838 | } |
839 | strbuf_addch(&buf, ':'); | |
840 | strbuf_addstr(&buf, ref->name); | |
841 | strbuf_addch(&buf, '\n'); | |
05c1eb10 JH |
842 | |
843 | /* | |
844 | * The "--force-with-lease" options without explicit | |
845 | * values to expect have already been expanded into | |
f4e54d02 | 846 | * the ref->old_oid_expect[] field; we can ignore |
05c1eb10 JH |
847 | * transport->smart_options->cas altogether and instead |
848 | * can enumerate them from the refs. | |
849 | */ | |
850 | if (ref->expect_old_sha1) { | |
851 | struct strbuf cas = STRBUF_INIT; | |
852 | strbuf_addf(&cas, "%s:%s", | |
f4e54d02 | 853 | ref->name, oid_to_hex(&ref->old_oid_expect)); |
05c1eb10 JH |
854 | string_list_append(&cas_options, strbuf_detach(&cas, NULL)); |
855 | } | |
ae4efe19 | 856 | } |
05c1eb10 JH |
857 | if (buf.len == 0) { |
858 | string_list_clear(&cas_options, 0); | |
d8f67d20 | 859 | return 0; |
05c1eb10 | 860 | } |
ae4efe19 | 861 | |
05c1eb10 JH |
862 | for_each_string_list_item(cas_option, &cas_options) |
863 | set_helper_option(transport, "cas", cas_option->string); | |
30261094 | 864 | set_common_push_options(transport, data->name, flags); |
ae4efe19 SP |
865 | |
866 | strbuf_addch(&buf, '\n'); | |
bf3c523c | 867 | sendline(data, &buf); |
ae4efe19 | 868 | strbuf_release(&buf); |
d2e73c6f | 869 | |
0551a06c | 870 | return push_update_refs_status(data, remote_refs, flags); |
ae4efe19 SP |
871 | } |
872 | ||
73b49a75 SR |
873 | static int push_refs_with_export(struct transport *transport, |
874 | struct ref *remote_refs, int flags) | |
875 | { | |
876 | struct ref *ref; | |
877 | struct child_process *helper, exporter; | |
878 | struct helper_data *data = transport->data; | |
d98c8153 | 879 | struct string_list revlist_args = STRING_LIST_INIT_DUP; |
73b49a75 SR |
880 | struct strbuf buf = STRBUF_INIT; |
881 | ||
21610d82 FC |
882 | if (!data->refspecs) |
883 | die("remote-helper doesn't support push; refspec needed"); | |
884 | ||
30261094 | 885 | set_common_push_options(transport, data->name, flags); |
510fa6f5 FC |
886 | if (flags & TRANSPORT_PUSH_FORCE) { |
887 | if (set_helper_option(transport, "force", "true") != 0) | |
888 | warning("helper %s does not support 'force'", data->name); | |
889 | } | |
890 | ||
73b49a75 SR |
891 | helper = get_helper(transport); |
892 | ||
893 | write_constant(helper->in, "export\n"); | |
894 | ||
73b49a75 SR |
895 | for (ref = remote_refs; ref; ref = ref->next) { |
896 | char *private; | |
27912a03 | 897 | struct object_id oid; |
73b49a75 | 898 | |
73b49a75 | 899 | private = apply_refspecs(data->refspecs, data->refspec_nr, ref->name); |
27912a03 | 900 | if (private && !get_sha1(private, oid.hash)) { |
73b49a75 | 901 | strbuf_addf(&buf, "^%s", private); |
1d2f80fa | 902 | string_list_append(&revlist_args, strbuf_detach(&buf, NULL)); |
27912a03 | 903 | oidcpy(&ref->old_oid, &oid); |
73b49a75 | 904 | } |
2faa1527 | 905 | free(private); |
73b49a75 | 906 | |
67c9c782 | 907 | if (ref->peer_ref) { |
d98c8153 | 908 | if (strcmp(ref->name, ref->peer_ref->name)) { |
f3d03763 FC |
909 | if (!ref->deletion) { |
910 | const char *name; | |
911 | int flag; | |
912 | ||
913 | /* Follow symbolic refs (mainly for HEAD). */ | |
7695d118 RS |
914 | name = resolve_ref_unsafe( |
915 | ref->peer_ref->name, | |
916 | RESOLVE_REF_READING, | |
27912a03 | 917 | oid.hash, &flag); |
f3d03763 FC |
918 | if (!name || !(flag & REF_ISSYMREF)) |
919 | name = ref->peer_ref->name; | |
9193f742 | 920 | |
f3d03763 FC |
921 | strbuf_addf(&buf, "%s:%s", name, ref->name); |
922 | } else | |
923 | strbuf_addf(&buf, ":%s", ref->name); | |
9193f742 | 924 | |
d98c8153 FC |
925 | string_list_append(&revlist_args, "--refspec"); |
926 | string_list_append(&revlist_args, buf.buf); | |
927 | strbuf_release(&buf); | |
928 | } | |
f3d03763 FC |
929 | if (!ref->deletion) |
930 | string_list_append(&revlist_args, ref->peer_ref->name); | |
67c9c782 | 931 | } |
73b49a75 SR |
932 | } |
933 | ||
a515ebe9 | 934 | if (get_exporter(transport, &exporter, &revlist_args)) |
73b49a75 SR |
935 | die("Couldn't run fast-export"); |
936 | ||
d98c8153 FC |
937 | string_list_clear(&revlist_args, 1); |
938 | ||
cc567322 SR |
939 | if (finish_command(&exporter)) |
940 | die("Error while running fast-export"); | |
3994e64d FC |
941 | if (push_update_refs_status(data, remote_refs, flags)) |
942 | return 1; | |
943 | ||
944 | if (data->export_marks) { | |
945 | strbuf_addf(&buf, "%s.tmp", data->export_marks); | |
946 | rename(buf.buf, data->export_marks); | |
947 | strbuf_release(&buf); | |
948 | } | |
949 | ||
950 | return 0; | |
73b49a75 SR |
951 | } |
952 | ||
953 | static int push_refs(struct transport *transport, | |
954 | struct ref *remote_refs, int flags) | |
955 | { | |
956 | struct helper_data *data = transport->data; | |
957 | ||
958 | if (process_connect(transport, 1)) { | |
959 | do_take_over(transport); | |
960 | return transport->push_refs(transport, remote_refs, flags); | |
961 | } | |
962 | ||
963 | if (!remote_refs) { | |
964 | fprintf(stderr, "No refs in common and none specified; doing nothing.\n" | |
965 | "Perhaps you should specify a branch such as 'master'.\n"); | |
966 | return 0; | |
967 | } | |
968 | ||
969 | if (data->push) | |
970 | return push_refs_with_push(transport, remote_refs, flags); | |
971 | ||
972 | if (data->export) | |
973 | return push_refs_with_export(transport, remote_refs, flags); | |
974 | ||
975 | return -1; | |
976 | } | |
977 | ||
978 | ||
f8ec9167 DB |
979 | static int has_attribute(const char *attrs, const char *attr) { |
980 | int len; | |
981 | if (!attrs) | |
982 | return 0; | |
983 | ||
984 | len = strlen(attr); | |
985 | for (;;) { | |
986 | const char *space = strchrnul(attrs, ' '); | |
987 | if (len == space - attrs && !strncmp(attrs, attr, len)) | |
988 | return 1; | |
989 | if (!*space) | |
990 | return 0; | |
991 | attrs = space + 1; | |
992 | } | |
993 | } | |
994 | ||
6eb996b5 DB |
995 | static struct ref *get_refs_list(struct transport *transport, int for_push) |
996 | { | |
292ce46b | 997 | struct helper_data *data = transport->data; |
6eb996b5 DB |
998 | struct child_process *helper; |
999 | struct ref *ret = NULL; | |
1000 | struct ref **tail = &ret; | |
1001 | struct ref *posn; | |
1002 | struct strbuf buf = STRBUF_INIT; | |
6eb996b5 DB |
1003 | |
1004 | helper = get_helper(transport); | |
2d14d65c | 1005 | |
fa8c097c IL |
1006 | if (process_connect(transport, for_push)) { |
1007 | do_take_over(transport); | |
1008 | return transport->get_refs_list(transport, for_push); | |
1009 | } | |
1010 | ||
ae4efe19 SP |
1011 | if (data->push && for_push) |
1012 | write_str_in_full(helper->in, "list for-push\n"); | |
1013 | else | |
1014 | write_str_in_full(helper->in, "list\n"); | |
6eb996b5 | 1015 | |
6eb996b5 DB |
1016 | while (1) { |
1017 | char *eov, *eon; | |
5931b33e FC |
1018 | if (recvline(data, &buf)) |
1019 | exit(128); | |
6eb996b5 DB |
1020 | |
1021 | if (!*buf.buf) | |
1022 | break; | |
1023 | ||
1024 | eov = strchr(buf.buf, ' '); | |
1025 | if (!eov) | |
1026 | die("Malformed response in ref list: %s", buf.buf); | |
1027 | eon = strchr(eov + 1, ' '); | |
1028 | *eov = '\0'; | |
1029 | if (eon) | |
1030 | *eon = '\0'; | |
1031 | *tail = alloc_ref(eov + 1); | |
1032 | if (buf.buf[0] == '@') | |
1033 | (*tail)->symref = xstrdup(buf.buf + 1); | |
1034 | else if (buf.buf[0] != '?') | |
f4e54d02 | 1035 | get_oid_hex(buf.buf, &(*tail)->old_oid); |
f8ec9167 DB |
1036 | if (eon) { |
1037 | if (has_attribute(eon + 1, "unchanged")) { | |
1038 | (*tail)->status |= REF_STATUS_UPTODATE; | |
ae25fd39 | 1039 | if (read_ref((*tail)->name, |
f4e54d02 | 1040 | (*tail)->old_oid.hash) < 0) |
ae25fd39 SB |
1041 | die(N_("Could not read ref %s"), |
1042 | (*tail)->name); | |
f8ec9167 DB |
1043 | } |
1044 | } | |
6eb996b5 DB |
1045 | tail = &((*tail)->next); |
1046 | } | |
bf3c523c IL |
1047 | if (debug) |
1048 | fprintf(stderr, "Debug: Read ref listing.\n"); | |
6eb996b5 DB |
1049 | strbuf_release(&buf); |
1050 | ||
1051 | for (posn = ret; posn; posn = posn->next) | |
1052 | resolve_remote_symref(posn, ret); | |
1053 | ||
1054 | return ret; | |
1055 | } | |
1056 | ||
c9e388bb | 1057 | int transport_helper_init(struct transport *transport, const char *name) |
6eb996b5 | 1058 | { |
92e25b6b | 1059 | struct helper_data *data = xcalloc(1, sizeof(*data)); |
c9e388bb | 1060 | data->name = name; |
6eb996b5 | 1061 | |
a5adaced JK |
1062 | transport_check_allowed(name); |
1063 | ||
bf3c523c IL |
1064 | if (getenv("GIT_TRANSPORT_HELPER_DEBUG")) |
1065 | debug = 1; | |
1066 | ||
6eb996b5 | 1067 | transport->data = data; |
ef08ef9e | 1068 | transport->set_option = set_helper_option; |
6eb996b5 DB |
1069 | transport->get_refs_list = get_refs_list; |
1070 | transport->fetch = fetch; | |
ae4efe19 | 1071 | transport->push_refs = push_refs; |
f2a37151 | 1072 | transport->disconnect = release_helper; |
b236752a | 1073 | transport->connect = connect_helper; |
61b075bd | 1074 | transport->smart_options = &(data->transport_options); |
6eb996b5 DB |
1075 | return 0; |
1076 | } | |
419f37db IL |
1077 | |
1078 | /* | |
1079 | * Linux pipes can buffer 65536 bytes at once (and most platforms can | |
1080 | * buffer less), so attempt reads and writes with up to that size. | |
1081 | */ | |
1082 | #define BUFFERSIZE 65536 | |
1083 | /* This should be enough to hold debugging message. */ | |
1084 | #define PBUFFERSIZE 8192 | |
1085 | ||
1086 | /* Print bidirectional transfer loop debug message. */ | |
4621085b | 1087 | __attribute__((format (printf, 1, 2))) |
419f37db IL |
1088 | static void transfer_debug(const char *fmt, ...) |
1089 | { | |
1090 | va_list args; | |
1091 | char msgbuf[PBUFFERSIZE]; | |
1092 | static int debug_enabled = -1; | |
1093 | ||
1094 | if (debug_enabled < 0) | |
1095 | debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0; | |
1096 | if (!debug_enabled) | |
1097 | return; | |
1098 | ||
1099 | va_start(args, fmt); | |
1100 | vsnprintf(msgbuf, PBUFFERSIZE, fmt, args); | |
1101 | va_end(args); | |
1102 | fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf); | |
1103 | } | |
1104 | ||
1105 | /* Stream state: More data may be coming in this direction. */ | |
1106 | #define SSTATE_TRANSFERING 0 | |
1107 | /* | |
1108 | * Stream state: No more data coming in this direction, flushing rest of | |
1109 | * data. | |
1110 | */ | |
1111 | #define SSTATE_FLUSHING 1 | |
1112 | /* Stream state: Transfer in this direction finished. */ | |
1113 | #define SSTATE_FINISHED 2 | |
1114 | ||
1115 | #define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERING) | |
1116 | #define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING) | |
1117 | #define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING) | |
1118 | ||
1119 | /* Unidirectional transfer. */ | |
1120 | struct unidirectional_transfer { | |
1121 | /* Source */ | |
1122 | int src; | |
1123 | /* Destination */ | |
1124 | int dest; | |
1125 | /* Is source socket? */ | |
1126 | int src_is_sock; | |
1127 | /* Is destination socket? */ | |
1128 | int dest_is_sock; | |
41ccfdd9 | 1129 | /* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */ |
419f37db IL |
1130 | int state; |
1131 | /* Buffer. */ | |
1132 | char buf[BUFFERSIZE]; | |
1133 | /* Buffer used. */ | |
1134 | size_t bufuse; | |
1135 | /* Name of source. */ | |
1136 | const char *src_name; | |
1137 | /* Name of destination. */ | |
1138 | const char *dest_name; | |
1139 | }; | |
1140 | ||
1141 | /* Closes the target (for writing) if transfer has finished. */ | |
1142 | static void udt_close_if_finished(struct unidirectional_transfer *t) | |
1143 | { | |
1144 | if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) { | |
1145 | t->state = SSTATE_FINISHED; | |
1146 | if (t->dest_is_sock) | |
1147 | shutdown(t->dest, SHUT_WR); | |
1148 | else | |
1149 | close(t->dest); | |
1150 | transfer_debug("Closed %s.", t->dest_name); | |
1151 | } | |
1152 | } | |
1153 | ||
1154 | /* | |
1155 | * Tries to read read data from source into buffer. If buffer is full, | |
1156 | * no data is read. Returns 0 on success, -1 on error. | |
1157 | */ | |
1158 | static int udt_do_read(struct unidirectional_transfer *t) | |
1159 | { | |
1160 | ssize_t bytes; | |
1161 | ||
1162 | if (t->bufuse == BUFFERSIZE) | |
1163 | return 0; /* No space for more. */ | |
1164 | ||
1165 | transfer_debug("%s is readable", t->src_name); | |
1166 | bytes = read(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse); | |
1167 | if (bytes < 0 && errno != EWOULDBLOCK && errno != EAGAIN && | |
1168 | errno != EINTR) { | |
1169 | error("read(%s) failed: %s", t->src_name, strerror(errno)); | |
1170 | return -1; | |
1171 | } else if (bytes == 0) { | |
1172 | transfer_debug("%s EOF (with %i bytes in buffer)", | |
4621085b | 1173 | t->src_name, (int)t->bufuse); |
419f37db IL |
1174 | t->state = SSTATE_FLUSHING; |
1175 | } else if (bytes > 0) { | |
1176 | t->bufuse += bytes; | |
1177 | transfer_debug("Read %i bytes from %s (buffer now at %i)", | |
1178 | (int)bytes, t->src_name, (int)t->bufuse); | |
1179 | } | |
1180 | return 0; | |
1181 | } | |
1182 | ||
1183 | /* Tries to write data from buffer into destination. If buffer is empty, | |
1184 | * no data is written. Returns 0 on success, -1 on error. | |
1185 | */ | |
1186 | static int udt_do_write(struct unidirectional_transfer *t) | |
1187 | { | |
803dbdb9 | 1188 | ssize_t bytes; |
419f37db IL |
1189 | |
1190 | if (t->bufuse == 0) | |
1191 | return 0; /* Nothing to write. */ | |
1192 | ||
1193 | transfer_debug("%s is writable", t->dest_name); | |
7edc02f4 EFL |
1194 | bytes = xwrite(t->dest, t->buf, t->bufuse); |
1195 | if (bytes < 0 && errno != EWOULDBLOCK) { | |
419f37db IL |
1196 | error("write(%s) failed: %s", t->dest_name, strerror(errno)); |
1197 | return -1; | |
1198 | } else if (bytes > 0) { | |
1199 | t->bufuse -= bytes; | |
1200 | if (t->bufuse) | |
1201 | memmove(t->buf, t->buf + bytes, t->bufuse); | |
1202 | transfer_debug("Wrote %i bytes to %s (buffer now at %i)", | |
1203 | (int)bytes, t->dest_name, (int)t->bufuse); | |
1204 | } | |
1205 | return 0; | |
1206 | } | |
1207 | ||
1208 | ||
1209 | /* State of bidirectional transfer loop. */ | |
1210 | struct bidirectional_transfer_state { | |
1211 | /* Direction from program to git. */ | |
1212 | struct unidirectional_transfer ptg; | |
1213 | /* Direction from git to program. */ | |
1214 | struct unidirectional_transfer gtp; | |
1215 | }; | |
1216 | ||
1217 | static void *udt_copy_task_routine(void *udt) | |
1218 | { | |
1219 | struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt; | |
1220 | while (t->state != SSTATE_FINISHED) { | |
1221 | if (STATE_NEEDS_READING(t->state)) | |
1222 | if (udt_do_read(t)) | |
1223 | return NULL; | |
1224 | if (STATE_NEEDS_WRITING(t->state)) | |
1225 | if (udt_do_write(t)) | |
1226 | return NULL; | |
1227 | if (STATE_NEEDS_CLOSING(t->state)) | |
1228 | udt_close_if_finished(t); | |
1229 | } | |
1230 | return udt; /* Just some non-NULL value. */ | |
1231 | } | |
1232 | ||
1233 | #ifndef NO_PTHREADS | |
1234 | ||
1235 | /* | |
98e023de | 1236 | * Join thread, with appropriate errors on failure. Name is name for the |
419f37db IL |
1237 | * thread (for error messages). Returns 0 on success, 1 on failure. |
1238 | */ | |
1239 | static int tloop_join(pthread_t thread, const char *name) | |
1240 | { | |
1241 | int err; | |
1242 | void *tret; | |
1243 | err = pthread_join(thread, &tret); | |
1244 | if (!tret) { | |
1245 | error("%s thread failed", name); | |
1246 | return 1; | |
1247 | } | |
1248 | if (err) { | |
1249 | error("%s thread failed to join: %s", name, strerror(err)); | |
1250 | return 1; | |
1251 | } | |
1252 | return 0; | |
1253 | } | |
1254 | ||
1255 | /* | |
1256 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1257 | * -1 on failure. | |
1258 | */ | |
1259 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1260 | { | |
1261 | pthread_t gtp_thread; | |
1262 | pthread_t ptg_thread; | |
1263 | int err; | |
1264 | int ret = 0; | |
1265 | err = pthread_create(>p_thread, NULL, udt_copy_task_routine, | |
1266 | &s->gtp); | |
1267 | if (err) | |
1268 | die("Can't start thread for copying data: %s", strerror(err)); | |
1269 | err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine, | |
1270 | &s->ptg); | |
1271 | if (err) | |
1272 | die("Can't start thread for copying data: %s", strerror(err)); | |
1273 | ||
1274 | ret |= tloop_join(gtp_thread, "Git to program copy"); | |
1275 | ret |= tloop_join(ptg_thread, "Program to git copy"); | |
1276 | return ret; | |
1277 | } | |
1278 | #else | |
1279 | ||
1280 | /* Close the source and target (for writing) for transfer. */ | |
1281 | static void udt_kill_transfer(struct unidirectional_transfer *t) | |
1282 | { | |
1283 | t->state = SSTATE_FINISHED; | |
1284 | /* | |
1285 | * Socket read end left open isn't a disaster if nobody | |
1286 | * attempts to read from it (mingw compat headers do not | |
1287 | * have SHUT_RD)... | |
1288 | * | |
1289 | * We can't fully close the socket since otherwise gtp | |
1290 | * task would first close the socket it sends data to | |
1291 | * while closing the ptg file descriptors. | |
1292 | */ | |
1293 | if (!t->src_is_sock) | |
1294 | close(t->src); | |
1295 | if (t->dest_is_sock) | |
1296 | shutdown(t->dest, SHUT_WR); | |
1297 | else | |
1298 | close(t->dest); | |
1299 | } | |
1300 | ||
1301 | /* | |
98e023de | 1302 | * Join process, with appropriate errors on failure. Name is name for the |
419f37db IL |
1303 | * process (for error messages). Returns 0 on success, 1 on failure. |
1304 | */ | |
1305 | static int tloop_join(pid_t pid, const char *name) | |
1306 | { | |
1307 | int tret; | |
1308 | if (waitpid(pid, &tret, 0) < 0) { | |
1309 | error("%s process failed to wait: %s", name, strerror(errno)); | |
1310 | return 1; | |
1311 | } | |
1312 | if (!WIFEXITED(tret) || WEXITSTATUS(tret)) { | |
1313 | error("%s process failed", name); | |
1314 | return 1; | |
1315 | } | |
1316 | return 0; | |
1317 | } | |
1318 | ||
1319 | /* | |
1320 | * Spawn the transfer tasks and then wait for them. Returns 0 on success, | |
1321 | * -1 on failure. | |
1322 | */ | |
1323 | static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s) | |
1324 | { | |
1325 | pid_t pid1, pid2; | |
1326 | int ret = 0; | |
1327 | ||
1328 | /* Fork thread #1: git to program. */ | |
1329 | pid1 = fork(); | |
1330 | if (pid1 < 0) | |
1331 | die_errno("Can't start thread for copying data"); | |
1332 | else if (pid1 == 0) { | |
1333 | udt_kill_transfer(&s->ptg); | |
1334 | exit(udt_copy_task_routine(&s->gtp) ? 0 : 1); | |
1335 | } | |
1336 | ||
1337 | /* Fork thread #2: program to git. */ | |
1338 | pid2 = fork(); | |
1339 | if (pid2 < 0) | |
1340 | die_errno("Can't start thread for copying data"); | |
1341 | else if (pid2 == 0) { | |
1342 | udt_kill_transfer(&s->gtp); | |
1343 | exit(udt_copy_task_routine(&s->ptg) ? 0 : 1); | |
1344 | } | |
1345 | ||
1346 | /* | |
1347 | * Close both streams in parent as to not interfere with | |
1348 | * end of file detection and wait for both tasks to finish. | |
1349 | */ | |
1350 | udt_kill_transfer(&s->gtp); | |
1351 | udt_kill_transfer(&s->ptg); | |
1352 | ret |= tloop_join(pid1, "Git to program copy"); | |
1353 | ret |= tloop_join(pid2, "Program to git copy"); | |
1354 | return ret; | |
1355 | } | |
1356 | #endif | |
1357 | ||
1358 | /* | |
1359 | * Copies data from stdin to output and from input to stdout simultaneously. | |
1360 | * Additionally filtering through given filter. If filter is NULL, uses | |
1361 | * identity filter. | |
1362 | */ | |
1363 | int bidirectional_transfer_loop(int input, int output) | |
1364 | { | |
1365 | struct bidirectional_transfer_state state; | |
1366 | ||
1367 | /* Fill the state fields. */ | |
1368 | state.ptg.src = input; | |
1369 | state.ptg.dest = 1; | |
1370 | state.ptg.src_is_sock = (input == output); | |
1371 | state.ptg.dest_is_sock = 0; | |
1372 | state.ptg.state = SSTATE_TRANSFERING; | |
1373 | state.ptg.bufuse = 0; | |
1374 | state.ptg.src_name = "remote input"; | |
1375 | state.ptg.dest_name = "stdout"; | |
1376 | ||
1377 | state.gtp.src = 0; | |
1378 | state.gtp.dest = output; | |
1379 | state.gtp.src_is_sock = 0; | |
1380 | state.gtp.dest_is_sock = (input == output); | |
1381 | state.gtp.state = SSTATE_TRANSFERING; | |
1382 | state.gtp.bufuse = 0; | |
1383 | state.gtp.src_name = "stdin"; | |
1384 | state.gtp.dest_name = "remote output"; | |
1385 | ||
1386 | return tloop_spawnwait_tasks(&state); | |
1387 | } |