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Commit | Line | Data |
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575f4974 | 1 | #include "cache.h" |
fc04c412 | 2 | #include "pack.h" |
8a65ff76 | 3 | #include "refs.h" |
f3a3214e | 4 | #include "pkt-line.h" |
38a81b4e | 5 | #include "sideband.h" |
b1bf95bb | 6 | #include "run-command.h" |
576162a4 | 7 | #include "exec_cmd.h" |
11031d7e JS |
8 | #include "commit.h" |
9 | #include "object.h" | |
d79796bc JH |
10 | #include "remote.h" |
11 | #include "transport.h" | |
da3efdb1 | 12 | #include "string-list.h" |
575f4974 | 13 | |
34263de0 | 14 | static const char receive_pack_usage[] = "git receive-pack <git-dir>"; |
575f4974 | 15 | |
986e8239 | 16 | enum deny_action { |
3d95d92b | 17 | DENY_UNCONFIGURED, |
986e8239 JK |
18 | DENY_IGNORE, |
19 | DENY_WARN, | |
4b05548f | 20 | DENY_REFUSE |
986e8239 JK |
21 | }; |
22 | ||
1b53a076 JH |
23 | static int deny_deletes; |
24 | static int deny_non_fast_forwards; | |
3d95d92b | 25 | static enum deny_action deny_current_branch = DENY_UNCONFIGURED; |
747ca245 | 26 | static enum deny_action deny_delete_current = DENY_UNCONFIGURED; |
20dc0016 | 27 | static int receive_fsck_objects; |
e28714c5 JH |
28 | static int receive_unpack_limit = -1; |
29 | static int transfer_unpack_limit = -1; | |
46732fae | 30 | static int unpack_limit = 100; |
96f1e58f | 31 | static int report_status; |
38a81b4e | 32 | static int use_sideband; |
b74fce16 | 33 | static int prefer_ofs_delta = 1; |
77e3efbf JH |
34 | static int auto_update_server_info; |
35 | static int auto_gc = 1; | |
747ca245 | 36 | static const char *head_name; |
185c04e0 | 37 | static int sent_capabilities; |
cfee10a7 | 38 | |
986e8239 JK |
39 | static enum deny_action parse_deny_action(const char *var, const char *value) |
40 | { | |
41 | if (value) { | |
42 | if (!strcasecmp(value, "ignore")) | |
43 | return DENY_IGNORE; | |
44 | if (!strcasecmp(value, "warn")) | |
45 | return DENY_WARN; | |
46 | if (!strcasecmp(value, "refuse")) | |
47 | return DENY_REFUSE; | |
48 | } | |
49 | if (git_config_bool(var, value)) | |
50 | return DENY_REFUSE; | |
51 | return DENY_IGNORE; | |
52 | } | |
53 | ||
ef90d6d4 | 54 | static int receive_pack_config(const char *var, const char *value, void *cb) |
6fb75bed | 55 | { |
a240de11 JK |
56 | if (strcmp(var, "receive.denydeletes") == 0) { |
57 | deny_deletes = git_config_bool(var, value); | |
58 | return 0; | |
59 | } | |
60 | ||
e28714c5 | 61 | if (strcmp(var, "receive.denynonfastforwards") == 0) { |
6fb75bed SP |
62 | deny_non_fast_forwards = git_config_bool(var, value); |
63 | return 0; | |
64 | } | |
65 | ||
e28714c5 JH |
66 | if (strcmp(var, "receive.unpacklimit") == 0) { |
67 | receive_unpack_limit = git_config_int(var, value); | |
fc04c412 SP |
68 | return 0; |
69 | } | |
70 | ||
e28714c5 JH |
71 | if (strcmp(var, "transfer.unpacklimit") == 0) { |
72 | transfer_unpack_limit = git_config_int(var, value); | |
73 | return 0; | |
74 | } | |
75 | ||
20dc0016 MK |
76 | if (strcmp(var, "receive.fsckobjects") == 0) { |
77 | receive_fsck_objects = git_config_bool(var, value); | |
78 | return 0; | |
79 | } | |
80 | ||
986e8239 JK |
81 | if (!strcmp(var, "receive.denycurrentbranch")) { |
82 | deny_current_branch = parse_deny_action(var, value); | |
83 | return 0; | |
84 | } | |
85 | ||
747ca245 JH |
86 | if (strcmp(var, "receive.denydeletecurrent") == 0) { |
87 | deny_delete_current = parse_deny_action(var, value); | |
88 | return 0; | |
89 | } | |
90 | ||
b74fce16 NP |
91 | if (strcmp(var, "repack.usedeltabaseoffset") == 0) { |
92 | prefer_ofs_delta = git_config_bool(var, value); | |
93 | return 0; | |
94 | } | |
95 | ||
77e3efbf JH |
96 | if (strcmp(var, "receive.updateserverinfo") == 0) { |
97 | auto_update_server_info = git_config_bool(var, value); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | if (strcmp(var, "receive.autogc") == 0) { | |
102 | auto_gc = git_config_bool(var, value); | |
103 | return 0; | |
104 | } | |
105 | ||
ef90d6d4 | 106 | return git_default_config(var, value, cb); |
6fb75bed SP |
107 | } |
108 | ||
8da19775 | 109 | static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data) |
575f4974 | 110 | { |
185c04e0 | 111 | if (sent_capabilities) |
cfee10a7 JH |
112 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), path); |
113 | else | |
185c04e0 SP |
114 | packet_write(1, "%s %s%c%s%s\n", |
115 | sha1_to_hex(sha1), path, 0, | |
38a81b4e | 116 | " report-status delete-refs side-band-64k", |
185c04e0 SP |
117 | prefer_ofs_delta ? " ofs-delta" : ""); |
118 | sent_capabilities = 1; | |
8a65ff76 | 119 | return 0; |
575f4974 LT |
120 | } |
121 | ||
8a65ff76 | 122 | static void write_head_info(void) |
575f4974 | 123 | { |
cb5d709f | 124 | for_each_ref(show_ref, NULL); |
185c04e0 | 125 | if (!sent_capabilities) |
8da19775 | 126 | show_ref("capabilities^{}", null_sha1, 0, NULL); |
cfee10a7 | 127 | |
575f4974 LT |
128 | } |
129 | ||
eb1af2df LT |
130 | struct command { |
131 | struct command *next; | |
cfee10a7 | 132 | const char *error_string; |
da3efdb1 | 133 | unsigned int skip_update; |
eb1af2df LT |
134 | unsigned char old_sha1[20]; |
135 | unsigned char new_sha1[20]; | |
8f1d2e6f | 136 | char ref_name[FLEX_ARRAY]; /* more */ |
575f4974 LT |
137 | }; |
138 | ||
05ef58ec SP |
139 | static const char pre_receive_hook[] = "hooks/pre-receive"; |
140 | static const char post_receive_hook[] = "hooks/post-receive"; | |
b1bf95bb | 141 | |
466dbc42 SP |
142 | static void rp_error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
143 | static void rp_warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
144 | ||
145 | static void report_message(const char *prefix, const char *err, va_list params) | |
146 | { | |
147 | int sz = strlen(prefix); | |
148 | char msg[4096]; | |
149 | ||
150 | strncpy(msg, prefix, sz); | |
151 | sz += vsnprintf(msg + sz, sizeof(msg) - sz, err, params); | |
152 | if (sz > (sizeof(msg) - 1)) | |
153 | sz = sizeof(msg) - 1; | |
154 | msg[sz++] = '\n'; | |
155 | ||
156 | if (use_sideband) | |
157 | send_sideband(1, 2, msg, sz, use_sideband); | |
158 | else | |
159 | xwrite(2, msg, sz); | |
160 | } | |
161 | ||
162 | static void rp_warning(const char *err, ...) | |
163 | { | |
164 | va_list params; | |
165 | va_start(params, err); | |
166 | report_message("warning: ", err, params); | |
167 | va_end(params); | |
168 | } | |
169 | ||
170 | static void rp_error(const char *err, ...) | |
171 | { | |
172 | va_list params; | |
173 | va_start(params, err); | |
174 | report_message("error: ", err, params); | |
175 | va_end(params); | |
176 | } | |
177 | ||
6d525d38 SP |
178 | static int copy_to_sideband(int in, int out, void *arg) |
179 | { | |
180 | char data[128]; | |
181 | while (1) { | |
182 | ssize_t sz = xread(in, data, sizeof(data)); | |
183 | if (sz <= 0) | |
184 | break; | |
185 | send_sideband(1, 2, data, sz, use_sideband); | |
186 | } | |
187 | close(in); | |
188 | return 0; | |
189 | } | |
190 | ||
5e1c71fd | 191 | static int run_receive_hook(struct command *commands, const char *hook_name) |
b1bf95bb | 192 | { |
f43cd49f | 193 | static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4]; |
c8dd2771 | 194 | struct command *cmd; |
f43cd49f | 195 | struct child_process proc; |
6d525d38 | 196 | struct async muxer; |
f43cd49f SP |
197 | const char *argv[2]; |
198 | int have_input = 0, code; | |
c8dd2771 | 199 | |
f43cd49f | 200 | for (cmd = commands; !have_input && cmd; cmd = cmd->next) { |
c8dd2771 | 201 | if (!cmd->error_string) |
f43cd49f | 202 | have_input = 1; |
c8dd2771 | 203 | } |
b1bf95bb | 204 | |
f43cd49f | 205 | if (!have_input || access(hook_name, X_OK) < 0) |
b1bf95bb | 206 | return 0; |
c8dd2771 | 207 | |
c8dd2771 | 208 | argv[0] = hook_name; |
f43cd49f SP |
209 | argv[1] = NULL; |
210 | ||
211 | memset(&proc, 0, sizeof(proc)); | |
212 | proc.argv = argv; | |
213 | proc.in = -1; | |
214 | proc.stdout_to_stderr = 1; | |
215 | ||
6d525d38 SP |
216 | if (use_sideband) { |
217 | memset(&muxer, 0, sizeof(muxer)); | |
218 | muxer.proc = copy_to_sideband; | |
219 | muxer.in = -1; | |
220 | code = start_async(&muxer); | |
221 | if (code) | |
222 | return code; | |
223 | proc.err = muxer.in; | |
224 | } | |
225 | ||
f43cd49f | 226 | code = start_command(&proc); |
6d525d38 SP |
227 | if (code) { |
228 | if (use_sideband) | |
229 | finish_async(&muxer); | |
90e41a89 | 230 | return code; |
6d525d38 SP |
231 | } |
232 | ||
f43cd49f | 233 | for (cmd = commands; cmd; cmd = cmd->next) { |
c8dd2771 | 234 | if (!cmd->error_string) { |
f43cd49f SP |
235 | size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n", |
236 | sha1_to_hex(cmd->old_sha1), | |
237 | sha1_to_hex(cmd->new_sha1), | |
238 | cmd->ref_name); | |
239 | if (write_in_full(proc.in, buf, n) != n) | |
240 | break; | |
c8dd2771 | 241 | } |
c8dd2771 | 242 | } |
e72ae288 | 243 | close(proc.in); |
6d525d38 SP |
244 | if (use_sideband) |
245 | finish_async(&muxer); | |
90e41a89 | 246 | return finish_command(&proc); |
b1bf95bb JW |
247 | } |
248 | ||
1d9e8b56 SP |
249 | static int run_update_hook(struct command *cmd) |
250 | { | |
251 | static const char update_hook[] = "hooks/update"; | |
1d9e8b56 | 252 | const char *argv[5]; |
6d525d38 SP |
253 | struct child_process proc; |
254 | int code; | |
1d9e8b56 SP |
255 | |
256 | if (access(update_hook, X_OK) < 0) | |
257 | return 0; | |
258 | ||
259 | argv[0] = update_hook; | |
260 | argv[1] = cmd->ref_name; | |
261 | argv[2] = sha1_to_hex(cmd->old_sha1); | |
262 | argv[3] = sha1_to_hex(cmd->new_sha1); | |
263 | argv[4] = NULL; | |
264 | ||
6d525d38 SP |
265 | memset(&proc, 0, sizeof(proc)); |
266 | proc.no_stdin = 1; | |
267 | proc.stdout_to_stderr = 1; | |
268 | proc.err = use_sideband ? -1 : 0; | |
269 | proc.argv = argv; | |
270 | ||
271 | code = start_command(&proc); | |
272 | if (code) | |
273 | return code; | |
274 | if (use_sideband) | |
275 | copy_to_sideband(proc.err, -1, NULL); | |
276 | return finish_command(&proc); | |
1d9e8b56 SP |
277 | } |
278 | ||
986e8239 JK |
279 | static int is_ref_checked_out(const char *ref) |
280 | { | |
986e8239 JK |
281 | if (is_bare_repository()) |
282 | return 0; | |
283 | ||
747ca245 | 284 | if (!head_name) |
986e8239 | 285 | return 0; |
747ca245 | 286 | return !strcmp(head_name, ref); |
986e8239 JK |
287 | } |
288 | ||
acd2a45b JH |
289 | static char *refuse_unconfigured_deny_msg[] = { |
290 | "By default, updating the current branch in a non-bare repository", | |
291 | "is denied, because it will make the index and work tree inconsistent", | |
292 | "with what you pushed, and will require 'git reset --hard' to match", | |
293 | "the work tree to HEAD.", | |
3d95d92b JH |
294 | "", |
295 | "You can set 'receive.denyCurrentBranch' configuration variable to", | |
acd2a45b JH |
296 | "'ignore' or 'warn' in the remote repository to allow pushing into", |
297 | "its current branch; however, this is not recommended unless you", | |
298 | "arranged to update its work tree to match what you pushed in some", | |
299 | "other way.", | |
3d95d92b | 300 | "", |
acd2a45b JH |
301 | "To squelch this message and still keep the default behaviour, set", |
302 | "'receive.denyCurrentBranch' configuration variable to 'refuse'." | |
3d95d92b JH |
303 | }; |
304 | ||
acd2a45b | 305 | static void refuse_unconfigured_deny(void) |
3d95d92b JH |
306 | { |
307 | int i; | |
acd2a45b | 308 | for (i = 0; i < ARRAY_SIZE(refuse_unconfigured_deny_msg); i++) |
a886ba28 | 309 | rp_error("%s", refuse_unconfigured_deny_msg[i]); |
3d95d92b JH |
310 | } |
311 | ||
375881fa JH |
312 | static char *refuse_unconfigured_deny_delete_current_msg[] = { |
313 | "By default, deleting the current branch is denied, because the next", | |
314 | "'git clone' won't result in any file checked out, causing confusion.", | |
747ca245 JH |
315 | "", |
316 | "You can set 'receive.denyDeleteCurrent' configuration variable to", | |
375881fa JH |
317 | "'warn' or 'ignore' in the remote repository to allow deleting the", |
318 | "current branch, with or without a warning message.", | |
747ca245 | 319 | "", |
375881fa | 320 | "To squelch this message, you can set it to 'refuse'." |
747ca245 JH |
321 | }; |
322 | ||
375881fa | 323 | static void refuse_unconfigured_deny_delete_current(void) |
747ca245 JH |
324 | { |
325 | int i; | |
326 | for (i = 0; | |
375881fa | 327 | i < ARRAY_SIZE(refuse_unconfigured_deny_delete_current_msg); |
747ca245 | 328 | i++) |
a886ba28 | 329 | rp_error("%s", refuse_unconfigured_deny_delete_current_msg[i]); |
747ca245 JH |
330 | } |
331 | ||
8aaf7d64 | 332 | static const char *update(struct command *cmd) |
2eca23da | 333 | { |
cfee10a7 JH |
334 | const char *name = cmd->ref_name; |
335 | unsigned char *old_sha1 = cmd->old_sha1; | |
336 | unsigned char *new_sha1 = cmd->new_sha1; | |
3159c8dc | 337 | struct ref_lock *lock; |
2eca23da | 338 | |
061d6b9a MK |
339 | /* only refs/... are allowed */ |
340 | if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) { | |
466dbc42 | 341 | rp_error("refusing to create funny ref '%s' remotely", name); |
8aaf7d64 | 342 | return "funny refname"; |
cfee10a7 | 343 | } |
d8a1deec | 344 | |
3d95d92b JH |
345 | if (is_ref_checked_out(name)) { |
346 | switch (deny_current_branch) { | |
347 | case DENY_IGNORE: | |
986e8239 | 348 | break; |
3d95d92b | 349 | case DENY_WARN: |
466dbc42 | 350 | rp_warning("updating the current branch"); |
986e8239 | 351 | break; |
3d95d92b | 352 | case DENY_REFUSE: |
acd2a45b | 353 | case DENY_UNCONFIGURED: |
466dbc42 | 354 | rp_error("refusing to update checked out branch: %s", name); |
acd2a45b JH |
355 | if (deny_current_branch == DENY_UNCONFIGURED) |
356 | refuse_unconfigured_deny(); | |
3d95d92b JH |
357 | return "branch is currently checked out"; |
358 | } | |
986e8239 JK |
359 | } |
360 | ||
d4f694ba | 361 | if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) { |
8aaf7d64 SP |
362 | error("unpack should have generated %s, " |
363 | "but I can't find it!", sha1_to_hex(new_sha1)); | |
364 | return "bad pack"; | |
cfee10a7 | 365 | } |
747ca245 JH |
366 | |
367 | if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) { | |
368 | if (deny_deletes && !prefixcmp(name, "refs/heads/")) { | |
466dbc42 | 369 | rp_error("denying ref deletion for %s", name); |
747ca245 JH |
370 | return "deletion prohibited"; |
371 | } | |
372 | ||
373 | if (!strcmp(name, head_name)) { | |
374 | switch (deny_delete_current) { | |
375 | case DENY_IGNORE: | |
376 | break; | |
377 | case DENY_WARN: | |
466dbc42 | 378 | rp_warning("deleting the current branch"); |
747ca245 JH |
379 | break; |
380 | case DENY_REFUSE: | |
375881fa JH |
381 | case DENY_UNCONFIGURED: |
382 | if (deny_delete_current == DENY_UNCONFIGURED) | |
383 | refuse_unconfigured_deny_delete_current(); | |
466dbc42 | 384 | rp_error("refusing to delete the current branch: %s", name); |
747ca245 JH |
385 | return "deletion of the current branch prohibited"; |
386 | } | |
387 | } | |
a240de11 | 388 | } |
747ca245 | 389 | |
d4f694ba | 390 | if (deny_non_fast_forwards && !is_null_sha1(new_sha1) && |
ba988a83 | 391 | !is_null_sha1(old_sha1) && |
cc44c765 | 392 | !prefixcmp(name, "refs/heads/")) { |
eab82707 | 393 | struct object *old_object, *new_object; |
11031d7e | 394 | struct commit *old_commit, *new_commit; |
9edd7e46 | 395 | struct commit_list *bases, *ent; |
11031d7e | 396 | |
eab82707 MK |
397 | old_object = parse_object(old_sha1); |
398 | new_object = parse_object(new_sha1); | |
399 | ||
400 | if (!old_object || !new_object || | |
401 | old_object->type != OBJ_COMMIT || | |
402 | new_object->type != OBJ_COMMIT) { | |
403 | error("bad sha1 objects for %s", name); | |
404 | return "bad ref"; | |
405 | } | |
406 | old_commit = (struct commit *)old_object; | |
407 | new_commit = (struct commit *)new_object; | |
9edd7e46 JS |
408 | bases = get_merge_bases(old_commit, new_commit, 1); |
409 | for (ent = bases; ent; ent = ent->next) | |
410 | if (!hashcmp(old_sha1, ent->item->object.sha1)) | |
11031d7e | 411 | break; |
9edd7e46 | 412 | free_commit_list(bases); |
8aaf7d64 | 413 | if (!ent) { |
466dbc42 SP |
414 | rp_error("denying non-fast-forward %s" |
415 | " (you should pull first)", name); | |
a75d7b54 | 416 | return "non-fast-forward"; |
8aaf7d64 | 417 | } |
11031d7e | 418 | } |
1d9e8b56 | 419 | if (run_update_hook(cmd)) { |
466dbc42 | 420 | rp_error("hook declined to update %s", name); |
8aaf7d64 | 421 | return "hook declined"; |
b1bf95bb | 422 | } |
3159c8dc | 423 | |
d4f694ba | 424 | if (is_null_sha1(new_sha1)) { |
28391a80 | 425 | if (!parse_object(old_sha1)) { |
466dbc42 | 426 | rp_warning("Allowing deletion of corrupt ref."); |
28391a80 JS |
427 | old_sha1 = NULL; |
428 | } | |
eca35a25 | 429 | if (delete_ref(name, old_sha1, 0)) { |
466dbc42 | 430 | rp_error("failed to delete %s", name); |
8aaf7d64 | 431 | return "failed to delete"; |
d4f694ba | 432 | } |
8aaf7d64 | 433 | return NULL; /* good */ |
d4f694ba JH |
434 | } |
435 | else { | |
68db31cc | 436 | lock = lock_any_ref_for_update(name, old_sha1, 0); |
d4f694ba | 437 | if (!lock) { |
466dbc42 | 438 | rp_error("failed to lock %s", name); |
8aaf7d64 | 439 | return "failed to lock"; |
d4f694ba | 440 | } |
ef203f08 | 441 | if (write_ref_sha1(lock, new_sha1, "push")) { |
8aaf7d64 | 442 | return "failed to write"; /* error() already called */ |
ef203f08 | 443 | } |
8aaf7d64 | 444 | return NULL; /* good */ |
19614330 | 445 | } |
2eca23da LT |
446 | } |
447 | ||
19614330 JH |
448 | static char update_post_hook[] = "hooks/post-update"; |
449 | ||
5e1c71fd | 450 | static void run_update_post_hook(struct command *commands) |
19614330 | 451 | { |
5e1c71fd | 452 | struct command *cmd; |
6d525d38 | 453 | int argc; |
9201c707 | 454 | const char **argv; |
6d525d38 | 455 | struct child_process proc; |
19614330 | 456 | |
5e1c71fd JS |
457 | for (argc = 0, cmd = commands; cmd; cmd = cmd->next) { |
458 | if (cmd->error_string) | |
19614330 JH |
459 | continue; |
460 | argc++; | |
461 | } | |
3e6e152c SP |
462 | if (!argc || access(update_post_hook, X_OK) < 0) |
463 | return; | |
464 | argv = xmalloc(sizeof(*argv) * (2 + argc)); | |
19614330 JH |
465 | argv[0] = update_post_hook; |
466 | ||
5e1c71fd | 467 | for (argc = 1, cmd = commands; cmd; cmd = cmd->next) { |
9201c707 | 468 | char *p; |
5e1c71fd | 469 | if (cmd->error_string) |
19614330 | 470 | continue; |
5e1c71fd JS |
471 | p = xmalloc(strlen(cmd->ref_name) + 1); |
472 | strcpy(p, cmd->ref_name); | |
9201c707 | 473 | argv[argc] = p; |
19614330 JH |
474 | argc++; |
475 | } | |
476 | argv[argc] = NULL; | |
6d525d38 SP |
477 | |
478 | memset(&proc, 0, sizeof(proc)); | |
479 | proc.no_stdin = 1; | |
480 | proc.stdout_to_stderr = 1; | |
481 | proc.err = use_sideband ? -1 : 0; | |
482 | proc.argv = argv; | |
483 | ||
484 | if (!start_command(&proc)) { | |
485 | if (use_sideband) | |
486 | copy_to_sideband(proc.err, -1, NULL); | |
487 | finish_command(&proc); | |
488 | } | |
19614330 | 489 | } |
2eca23da | 490 | |
da3efdb1 JS |
491 | static void check_aliased_update(struct command *cmd, struct string_list *list) |
492 | { | |
493 | struct string_list_item *item; | |
494 | struct command *dst_cmd; | |
495 | unsigned char sha1[20]; | |
496 | char cmd_oldh[41], cmd_newh[41], dst_oldh[41], dst_newh[41]; | |
497 | int flag; | |
498 | ||
499 | const char *dst_name = resolve_ref(cmd->ref_name, sha1, 0, &flag); | |
500 | ||
501 | if (!(flag & REF_ISSYMREF)) | |
502 | return; | |
503 | ||
e8c8b713 | 504 | if ((item = string_list_lookup(list, dst_name)) == NULL) |
da3efdb1 JS |
505 | return; |
506 | ||
507 | cmd->skip_update = 1; | |
508 | ||
509 | dst_cmd = (struct command *) item->util; | |
510 | ||
511 | if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) && | |
512 | !hashcmp(cmd->new_sha1, dst_cmd->new_sha1)) | |
513 | return; | |
514 | ||
515 | dst_cmd->skip_update = 1; | |
516 | ||
517 | strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV)); | |
0e71bc30 | 518 | strcpy(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 | 519 | strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV)); |
0e71bc30 | 520 | strcpy(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 JS |
521 | rp_error("refusing inconsistent update between symref '%s' (%s..%s) and" |
522 | " its target '%s' (%s..%s)", | |
523 | cmd->ref_name, cmd_oldh, cmd_newh, | |
524 | dst_cmd->ref_name, dst_oldh, dst_newh); | |
525 | ||
526 | cmd->error_string = dst_cmd->error_string = | |
527 | "inconsistent aliased update"; | |
528 | } | |
529 | ||
530 | static void check_aliased_updates(struct command *commands) | |
531 | { | |
532 | struct command *cmd; | |
533 | struct string_list ref_list = { NULL, 0, 0, 0 }; | |
534 | ||
535 | for (cmd = commands; cmd; cmd = cmd->next) { | |
536 | struct string_list_item *item = | |
1d2f80fa | 537 | string_list_append(&ref_list, cmd->ref_name); |
da3efdb1 JS |
538 | item->util = (void *)cmd; |
539 | } | |
540 | sort_string_list(&ref_list); | |
541 | ||
542 | for (cmd = commands; cmd; cmd = cmd->next) | |
543 | check_aliased_update(cmd, &ref_list); | |
544 | ||
545 | string_list_clear(&ref_list, 0); | |
546 | } | |
547 | ||
5e1c71fd | 548 | static void execute_commands(struct command *commands, const char *unpacker_error) |
575f4974 | 549 | { |
5e1c71fd | 550 | struct command *cmd; |
747ca245 | 551 | unsigned char sha1[20]; |
8aaf7d64 SP |
552 | |
553 | if (unpacker_error) { | |
5e1c71fd | 554 | for (cmd = commands; cmd; cmd = cmd->next) |
8aaf7d64 | 555 | cmd->error_string = "n/a (unpacker error)"; |
8aaf7d64 SP |
556 | return; |
557 | } | |
558 | ||
5e1c71fd JS |
559 | if (run_receive_hook(commands, pre_receive_hook)) { |
560 | for (cmd = commands; cmd; cmd = cmd->next) | |
05ef58ec | 561 | cmd->error_string = "pre-receive hook declined"; |
05ef58ec SP |
562 | return; |
563 | } | |
564 | ||
da3efdb1 JS |
565 | check_aliased_updates(commands); |
566 | ||
747ca245 JH |
567 | head_name = resolve_ref("HEAD", sha1, 0, NULL); |
568 | ||
5e1c71fd | 569 | for (cmd = commands; cmd; cmd = cmd->next) |
da3efdb1 JS |
570 | if (!cmd->skip_update) |
571 | cmd->error_string = update(cmd); | |
575f4974 LT |
572 | } |
573 | ||
5e1c71fd | 574 | static struct command *read_head_info(void) |
575f4974 | 575 | { |
5e1c71fd | 576 | struct command *commands = NULL; |
eb1af2df | 577 | struct command **p = &commands; |
575f4974 LT |
578 | for (;;) { |
579 | static char line[1000]; | |
eb1af2df LT |
580 | unsigned char old_sha1[20], new_sha1[20]; |
581 | struct command *cmd; | |
cfee10a7 JH |
582 | char *refname; |
583 | int len, reflen; | |
eb1af2df LT |
584 | |
585 | len = packet_read_line(0, line, sizeof(line)); | |
575f4974 LT |
586 | if (!len) |
587 | break; | |
eb1af2df LT |
588 | if (line[len-1] == '\n') |
589 | line[--len] = 0; | |
590 | if (len < 83 || | |
591 | line[40] != ' ' || | |
592 | line[81] != ' ' || | |
593 | get_sha1_hex(line, old_sha1) || | |
594 | get_sha1_hex(line + 41, new_sha1)) | |
cfee10a7 JH |
595 | die("protocol error: expected old/new/ref, got '%s'", |
596 | line); | |
597 | ||
598 | refname = line + 82; | |
599 | reflen = strlen(refname); | |
600 | if (reflen + 82 < len) { | |
601 | if (strstr(refname + reflen + 1, "report-status")) | |
602 | report_status = 1; | |
38a81b4e SP |
603 | if (strstr(refname + reflen + 1, "side-band-64k")) |
604 | use_sideband = LARGE_PACKET_MAX; | |
cfee10a7 | 605 | } |
da3efdb1 | 606 | cmd = xcalloc(1, sizeof(struct command) + len - 80); |
e702496e SP |
607 | hashcpy(cmd->old_sha1, old_sha1); |
608 | hashcpy(cmd->new_sha1, new_sha1); | |
eb1af2df | 609 | memcpy(cmd->ref_name, line + 82, len - 81); |
eb1af2df LT |
610 | *p = cmd; |
611 | p = &cmd->next; | |
575f4974 | 612 | } |
5e1c71fd | 613 | return commands; |
575f4974 LT |
614 | } |
615 | ||
fc04c412 SP |
616 | static const char *parse_pack_header(struct pack_header *hdr) |
617 | { | |
a69e5429 JH |
618 | switch (read_pack_header(0, hdr)) { |
619 | case PH_ERROR_EOF: | |
620 | return "eof before pack header was fully read"; | |
621 | ||
622 | case PH_ERROR_PACK_SIGNATURE: | |
fc04c412 | 623 | return "protocol error (pack signature mismatch detected)"; |
a69e5429 JH |
624 | |
625 | case PH_ERROR_PROTOCOL: | |
fc04c412 | 626 | return "protocol error (pack version unsupported)"; |
a69e5429 JH |
627 | |
628 | default: | |
629 | return "unknown error in parse_pack_header"; | |
630 | ||
631 | case 0: | |
632 | return NULL; | |
633 | } | |
fc04c412 SP |
634 | } |
635 | ||
576162a4 NP |
636 | static const char *pack_lockfile; |
637 | ||
861ed121 | 638 | static const char *unpack(void) |
575f4974 | 639 | { |
fc04c412 SP |
640 | struct pack_header hdr; |
641 | const char *hdr_err; | |
642 | char hdr_arg[38]; | |
fc04c412 SP |
643 | |
644 | hdr_err = parse_pack_header(&hdr); | |
645 | if (hdr_err) | |
646 | return hdr_err; | |
6e1c2344 RJ |
647 | snprintf(hdr_arg, sizeof(hdr_arg), |
648 | "--pack_header=%"PRIu32",%"PRIu32, | |
fc04c412 SP |
649 | ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries)); |
650 | ||
651 | if (ntohl(hdr.hdr_entries) < unpack_limit) { | |
20dc0016 MK |
652 | int code, i = 0; |
653 | const char *unpacker[4]; | |
654 | unpacker[i++] = "unpack-objects"; | |
655 | if (receive_fsck_objects) | |
656 | unpacker[i++] = "--strict"; | |
657 | unpacker[i++] = hdr_arg; | |
658 | unpacker[i++] = NULL; | |
9b0b5093 | 659 | code = run_command_v_opt(unpacker, RUN_GIT_CMD); |
2ff4d1ab | 660 | if (!code) |
fc04c412 | 661 | return NULL; |
2ff4d1ab | 662 | return "unpack-objects abnormal exit"; |
576162a4 | 663 | } else { |
20dc0016 MK |
664 | const char *keeper[7]; |
665 | int s, status, i = 0; | |
576162a4 | 666 | char keep_arg[256]; |
e8016abf | 667 | struct child_process ip; |
576162a4 | 668 | |
85e72830 | 669 | s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid()); |
576162a4 NP |
670 | if (gethostname(keep_arg + s, sizeof(keep_arg) - s)) |
671 | strcpy(keep_arg + s, "localhost"); | |
672 | ||
20dc0016 MK |
673 | keeper[i++] = "index-pack"; |
674 | keeper[i++] = "--stdin"; | |
675 | if (receive_fsck_objects) | |
676 | keeper[i++] = "--strict"; | |
677 | keeper[i++] = "--fix-thin"; | |
678 | keeper[i++] = hdr_arg; | |
679 | keeper[i++] = keep_arg; | |
680 | keeper[i++] = NULL; | |
e8016abf SP |
681 | memset(&ip, 0, sizeof(ip)); |
682 | ip.argv = keeper; | |
683 | ip.out = -1; | |
684 | ip.git_cmd = 1; | |
2ff4d1ab JS |
685 | status = start_command(&ip); |
686 | if (status) { | |
576162a4 | 687 | return "index-pack fork failed"; |
2ff4d1ab | 688 | } |
106764e6 | 689 | pack_lockfile = index_pack_lockfile(ip.out); |
e72ae288 | 690 | close(ip.out); |
e8016abf SP |
691 | status = finish_command(&ip); |
692 | if (!status) { | |
576162a4 NP |
693 | reprepare_packed_git(); |
694 | return NULL; | |
695 | } | |
696 | return "index-pack abnormal exit"; | |
cfee10a7 JH |
697 | } |
698 | } | |
699 | ||
5e1c71fd | 700 | static void report(struct command *commands, const char *unpack_status) |
cfee10a7 JH |
701 | { |
702 | struct command *cmd; | |
38a81b4e SP |
703 | struct strbuf buf = STRBUF_INIT; |
704 | ||
705 | packet_buf_write(&buf, "unpack %s\n", | |
706 | unpack_status ? unpack_status : "ok"); | |
cfee10a7 JH |
707 | for (cmd = commands; cmd; cmd = cmd->next) { |
708 | if (!cmd->error_string) | |
38a81b4e SP |
709 | packet_buf_write(&buf, "ok %s\n", |
710 | cmd->ref_name); | |
cfee10a7 | 711 | else |
38a81b4e SP |
712 | packet_buf_write(&buf, "ng %s %s\n", |
713 | cmd->ref_name, cmd->error_string); | |
575f4974 | 714 | } |
38a81b4e SP |
715 | packet_buf_flush(&buf); |
716 | ||
717 | if (use_sideband) | |
718 | send_sideband(1, 1, buf.buf, buf.len, use_sideband); | |
719 | else | |
720 | safe_write(1, buf.buf, buf.len); | |
721 | strbuf_release(&buf); | |
575f4974 LT |
722 | } |
723 | ||
5e1c71fd | 724 | static int delete_only(struct command *commands) |
d4f694ba | 725 | { |
5e1c71fd JS |
726 | struct command *cmd; |
727 | for (cmd = commands; cmd; cmd = cmd->next) { | |
d4f694ba JH |
728 | if (!is_null_sha1(cmd->new_sha1)) |
729 | return 0; | |
d4f694ba JH |
730 | } |
731 | return 1; | |
732 | } | |
733 | ||
d79796bc JH |
734 | static int add_refs_from_alternate(struct alternate_object_database *e, void *unused) |
735 | { | |
b8492539 JH |
736 | char *other; |
737 | size_t len; | |
d79796bc JH |
738 | struct remote *remote; |
739 | struct transport *transport; | |
740 | const struct ref *extra; | |
741 | ||
b8492539 JH |
742 | e->name[-1] = '\0'; |
743 | other = xstrdup(make_absolute_path(e->base)); | |
744 | e->name[-1] = '/'; | |
745 | len = strlen(other); | |
746 | ||
d79796bc JH |
747 | while (other[len-1] == '/') |
748 | other[--len] = '\0'; | |
749 | if (len < 8 || memcmp(other + len - 8, "/objects", 8)) | |
750 | return 0; | |
751 | /* Is this a git repository with refs? */ | |
752 | memcpy(other + len - 8, "/refs", 6); | |
753 | if (!is_directory(other)) | |
754 | return 0; | |
755 | other[len - 8] = '\0'; | |
756 | remote = remote_get(other); | |
757 | transport = transport_get(remote, other); | |
758 | for (extra = transport_get_remote_refs(transport); | |
759 | extra; | |
760 | extra = extra->next) { | |
761 | add_extra_ref(".have", extra->old_sha1, 0); | |
762 | } | |
763 | transport_disconnect(transport); | |
764 | free(other); | |
765 | return 0; | |
766 | } | |
767 | ||
768 | static void add_alternate_refs(void) | |
769 | { | |
770 | foreach_alt_odb(add_refs_from_alternate, NULL); | |
771 | } | |
772 | ||
be5908ae | 773 | int cmd_receive_pack(int argc, const char **argv, const char *prefix) |
575f4974 | 774 | { |
42526b47 SP |
775 | int advertise_refs = 0; |
776 | int stateless_rpc = 0; | |
d0efc8a7 | 777 | int i; |
8d630132 | 778 | char *dir = NULL; |
5e1c71fd | 779 | struct command *commands; |
575f4974 LT |
780 | |
781 | argv++; | |
782 | for (i = 1; i < argc; i++) { | |
be5908ae | 783 | const char *arg = *argv++; |
575f4974 LT |
784 | |
785 | if (*arg == '-') { | |
42526b47 SP |
786 | if (!strcmp(arg, "--advertise-refs")) { |
787 | advertise_refs = 1; | |
788 | continue; | |
789 | } | |
790 | if (!strcmp(arg, "--stateless-rpc")) { | |
791 | stateless_rpc = 1; | |
792 | continue; | |
793 | } | |
794 | ||
575f4974 LT |
795 | usage(receive_pack_usage); |
796 | } | |
d0efc8a7 LT |
797 | if (dir) |
798 | usage(receive_pack_usage); | |
be5908ae | 799 | dir = xstrdup(arg); |
575f4974 LT |
800 | } |
801 | if (!dir) | |
802 | usage(receive_pack_usage); | |
803 | ||
e1464ca7 | 804 | setup_path(); |
5c09f321 | 805 | |
3159c8dc | 806 | if (!enter_repo(dir, 0)) |
05ac6b34 | 807 | die("'%s' does not appear to be a git repository", dir); |
575f4974 | 808 | |
a0022eeb JH |
809 | if (is_repository_shallow()) |
810 | die("attempt to push into a shallow repository"); | |
811 | ||
ef90d6d4 | 812 | git_config(receive_pack_config, NULL); |
6fb75bed | 813 | |
e28714c5 JH |
814 | if (0 <= transfer_unpack_limit) |
815 | unpack_limit = transfer_unpack_limit; | |
816 | else if (0 <= receive_unpack_limit) | |
817 | unpack_limit = receive_unpack_limit; | |
818 | ||
42526b47 SP |
819 | if (advertise_refs || !stateless_rpc) { |
820 | add_alternate_refs(); | |
821 | write_head_info(); | |
822 | clear_extra_refs(); | |
575f4974 | 823 | |
42526b47 SP |
824 | /* EOF */ |
825 | packet_flush(1); | |
826 | } | |
827 | if (advertise_refs) | |
828 | return 0; | |
575f4974 | 829 | |
5e1c71fd | 830 | if ((commands = read_head_info()) != NULL) { |
d4f694ba JH |
831 | const char *unpack_status = NULL; |
832 | ||
833 | if (!delete_only(commands)) | |
834 | unpack_status = unpack(); | |
5e1c71fd | 835 | execute_commands(commands, unpack_status); |
576162a4 | 836 | if (pack_lockfile) |
691f1a28 | 837 | unlink_or_warn(pack_lockfile); |
cfee10a7 | 838 | if (report_status) |
5e1c71fd JS |
839 | report(commands, unpack_status); |
840 | run_receive_hook(commands, post_receive_hook); | |
8e663d9e | 841 | run_update_post_hook(commands); |
77e3efbf JH |
842 | if (auto_gc) { |
843 | const char *argv_gc_auto[] = { | |
844 | "gc", "--auto", "--quiet", NULL, | |
845 | }; | |
846 | run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); | |
847 | } | |
848 | if (auto_update_server_info) | |
849 | update_server_info(0); | |
7f8e9828 | 850 | } |
38a81b4e SP |
851 | if (use_sideband) |
852 | packet_flush(1); | |
575f4974 LT |
853 | return 0; |
854 | } |