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Commit | Line | Data |
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1e4cd68c | 1 | #include "builtin.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" |
cff38a5e | 13 | #include "sha1-array.h" |
52fed6e1 | 14 | #include "connected.h" |
ff5effdf | 15 | #include "version.h" |
575f4974 | 16 | |
34263de0 | 17 | static const char receive_pack_usage[] = "git receive-pack <git-dir>"; |
575f4974 | 18 | |
986e8239 | 19 | enum deny_action { |
3d95d92b | 20 | DENY_UNCONFIGURED, |
986e8239 JK |
21 | DENY_IGNORE, |
22 | DENY_WARN, | |
4b05548f | 23 | DENY_REFUSE |
986e8239 JK |
24 | }; |
25 | ||
1b53a076 JH |
26 | static int deny_deletes; |
27 | static int deny_non_fast_forwards; | |
3d95d92b | 28 | static enum deny_action deny_current_branch = DENY_UNCONFIGURED; |
747ca245 | 29 | static enum deny_action deny_delete_current = DENY_UNCONFIGURED; |
dab76d3a JH |
30 | static int receive_fsck_objects = -1; |
31 | static int transfer_fsck_objects = -1; | |
e28714c5 JH |
32 | static int receive_unpack_limit = -1; |
33 | static int transfer_unpack_limit = -1; | |
46732fae | 34 | static int unpack_limit = 100; |
96f1e58f | 35 | static int report_status; |
38a81b4e | 36 | static int use_sideband; |
c207e34f | 37 | static int quiet; |
b74fce16 | 38 | static int prefer_ofs_delta = 1; |
77e3efbf JH |
39 | static int auto_update_server_info; |
40 | static int auto_gc = 1; | |
747ca245 | 41 | static const char *head_name; |
96ec7b1e | 42 | static void *head_name_to_free; |
185c04e0 | 43 | static int sent_capabilities; |
cfee10a7 | 44 | |
986e8239 JK |
45 | static enum deny_action parse_deny_action(const char *var, const char *value) |
46 | { | |
47 | if (value) { | |
48 | if (!strcasecmp(value, "ignore")) | |
49 | return DENY_IGNORE; | |
50 | if (!strcasecmp(value, "warn")) | |
51 | return DENY_WARN; | |
52 | if (!strcasecmp(value, "refuse")) | |
53 | return DENY_REFUSE; | |
54 | } | |
55 | if (git_config_bool(var, value)) | |
56 | return DENY_REFUSE; | |
57 | return DENY_IGNORE; | |
58 | } | |
59 | ||
ef90d6d4 | 60 | static int receive_pack_config(const char *var, const char *value, void *cb) |
6fb75bed | 61 | { |
a240de11 JK |
62 | if (strcmp(var, "receive.denydeletes") == 0) { |
63 | deny_deletes = git_config_bool(var, value); | |
64 | return 0; | |
65 | } | |
66 | ||
e28714c5 | 67 | if (strcmp(var, "receive.denynonfastforwards") == 0) { |
6fb75bed SP |
68 | deny_non_fast_forwards = git_config_bool(var, value); |
69 | return 0; | |
70 | } | |
71 | ||
e28714c5 JH |
72 | if (strcmp(var, "receive.unpacklimit") == 0) { |
73 | receive_unpack_limit = git_config_int(var, value); | |
fc04c412 SP |
74 | return 0; |
75 | } | |
76 | ||
e28714c5 JH |
77 | if (strcmp(var, "transfer.unpacklimit") == 0) { |
78 | transfer_unpack_limit = git_config_int(var, value); | |
79 | return 0; | |
80 | } | |
81 | ||
20dc0016 MK |
82 | if (strcmp(var, "receive.fsckobjects") == 0) { |
83 | receive_fsck_objects = git_config_bool(var, value); | |
84 | return 0; | |
85 | } | |
86 | ||
dab76d3a JH |
87 | if (strcmp(var, "transfer.fsckobjects") == 0) { |
88 | transfer_fsck_objects = git_config_bool(var, value); | |
89 | return 0; | |
90 | } | |
91 | ||
986e8239 JK |
92 | if (!strcmp(var, "receive.denycurrentbranch")) { |
93 | deny_current_branch = parse_deny_action(var, value); | |
94 | return 0; | |
95 | } | |
96 | ||
747ca245 JH |
97 | if (strcmp(var, "receive.denydeletecurrent") == 0) { |
98 | deny_delete_current = parse_deny_action(var, value); | |
99 | return 0; | |
100 | } | |
101 | ||
b74fce16 NP |
102 | if (strcmp(var, "repack.usedeltabaseoffset") == 0) { |
103 | prefer_ofs_delta = git_config_bool(var, value); | |
104 | return 0; | |
105 | } | |
106 | ||
77e3efbf JH |
107 | if (strcmp(var, "receive.updateserverinfo") == 0) { |
108 | auto_update_server_info = git_config_bool(var, value); | |
109 | return 0; | |
110 | } | |
111 | ||
112 | if (strcmp(var, "receive.autogc") == 0) { | |
113 | auto_gc = git_config_bool(var, value); | |
114 | return 0; | |
115 | } | |
116 | ||
ef90d6d4 | 117 | return git_default_config(var, value, cb); |
6fb75bed SP |
118 | } |
119 | ||
bc98201d | 120 | static void show_ref(const char *path, const unsigned char *sha1) |
575f4974 | 121 | { |
185c04e0 | 122 | if (sent_capabilities) |
cfee10a7 JH |
123 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), path); |
124 | else | |
ff5effdf | 125 | packet_write(1, "%s %s%c%s%s agent=%s\n", |
185c04e0 | 126 | sha1_to_hex(sha1), path, 0, |
c207e34f | 127 | " report-status delete-refs side-band-64k quiet", |
ff5effdf JK |
128 | prefer_ofs_delta ? " ofs-delta" : "", |
129 | git_user_agent_sanitized()); | |
185c04e0 | 130 | sent_capabilities = 1; |
575f4974 LT |
131 | } |
132 | ||
bc98201d | 133 | static int show_ref_cb(const char *path, const unsigned char *sha1, int flag, void *unused) |
6b01ecfe JT |
134 | { |
135 | path = strip_namespace(path); | |
136 | /* | |
137 | * Advertise refs outside our current namespace as ".have" | |
138 | * refs, so that the client can use them to minimize data | |
139 | * transfer but will otherwise ignore them. This happens to | |
140 | * cover ".have" that are thrown in by add_one_alternate_ref() | |
141 | * to mark histories that are complete in our alternates as | |
142 | * well. | |
143 | */ | |
144 | if (!path) | |
145 | path = ".have"; | |
bc98201d MH |
146 | show_ref(path, sha1); |
147 | return 0; | |
6b01ecfe JT |
148 | } |
149 | ||
85f25104 | 150 | static void show_one_alternate_sha1(const unsigned char sha1[20], void *unused) |
b7a025d9 | 151 | { |
85f25104 | 152 | show_ref(".have", sha1); |
b7a025d9 MH |
153 | } |
154 | ||
155 | static void collect_one_alternate_ref(const struct ref *ref, void *data) | |
156 | { | |
157 | struct sha1_array *sa = data; | |
158 | sha1_array_append(sa, ref->old_sha1); | |
6b01ecfe JT |
159 | } |
160 | ||
8a65ff76 | 161 | static void write_head_info(void) |
575f4974 | 162 | { |
b7a025d9 MH |
163 | struct sha1_array sa = SHA1_ARRAY_INIT; |
164 | for_each_alternate_ref(collect_one_alternate_ref, &sa); | |
85f25104 | 165 | sha1_array_for_each_unique(&sa, show_one_alternate_sha1, NULL); |
b7a025d9 | 166 | sha1_array_clear(&sa); |
6b01ecfe | 167 | for_each_ref(show_ref_cb, NULL); |
185c04e0 | 168 | if (!sent_capabilities) |
bc98201d | 169 | show_ref("capabilities^{}", null_sha1); |
cfee10a7 | 170 | |
b7a025d9 MH |
171 | /* EOF */ |
172 | packet_flush(1); | |
575f4974 LT |
173 | } |
174 | ||
eb1af2df LT |
175 | struct command { |
176 | struct command *next; | |
cfee10a7 | 177 | const char *error_string; |
160b81ed PYH |
178 | unsigned int skip_update:1, |
179 | did_not_exist:1; | |
eb1af2df LT |
180 | unsigned char old_sha1[20]; |
181 | unsigned char new_sha1[20]; | |
8f1d2e6f | 182 | char ref_name[FLEX_ARRAY]; /* more */ |
575f4974 LT |
183 | }; |
184 | ||
05ef58ec SP |
185 | static const char pre_receive_hook[] = "hooks/pre-receive"; |
186 | static const char post_receive_hook[] = "hooks/post-receive"; | |
b1bf95bb | 187 | |
466dbc42 SP |
188 | static void rp_error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
189 | static void rp_warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
190 | ||
191 | static void report_message(const char *prefix, const char *err, va_list params) | |
192 | { | |
193 | int sz = strlen(prefix); | |
194 | char msg[4096]; | |
195 | ||
196 | strncpy(msg, prefix, sz); | |
197 | sz += vsnprintf(msg + sz, sizeof(msg) - sz, err, params); | |
198 | if (sz > (sizeof(msg) - 1)) | |
199 | sz = sizeof(msg) - 1; | |
200 | msg[sz++] = '\n'; | |
201 | ||
202 | if (use_sideband) | |
203 | send_sideband(1, 2, msg, sz, use_sideband); | |
204 | else | |
205 | xwrite(2, msg, sz); | |
206 | } | |
207 | ||
208 | static void rp_warning(const char *err, ...) | |
209 | { | |
210 | va_list params; | |
211 | va_start(params, err); | |
212 | report_message("warning: ", err, params); | |
213 | va_end(params); | |
214 | } | |
215 | ||
216 | static void rp_error(const char *err, ...) | |
217 | { | |
218 | va_list params; | |
219 | va_start(params, err); | |
220 | report_message("error: ", err, params); | |
221 | va_end(params); | |
222 | } | |
223 | ||
6d525d38 SP |
224 | static int copy_to_sideband(int in, int out, void *arg) |
225 | { | |
226 | char data[128]; | |
227 | while (1) { | |
228 | ssize_t sz = xread(in, data, sizeof(data)); | |
229 | if (sz <= 0) | |
230 | break; | |
231 | send_sideband(1, 2, data, sz, use_sideband); | |
232 | } | |
233 | close(in); | |
234 | return 0; | |
235 | } | |
236 | ||
9684e44a JH |
237 | typedef int (*feed_fn)(void *, const char **, size_t *); |
238 | static int run_and_feed_hook(const char *hook_name, feed_fn feed, void *feed_state) | |
b1bf95bb | 239 | { |
f43cd49f | 240 | struct child_process proc; |
6d525d38 | 241 | struct async muxer; |
f43cd49f | 242 | const char *argv[2]; |
9684e44a | 243 | int code; |
b1bf95bb | 244 | |
9684e44a | 245 | if (access(hook_name, X_OK) < 0) |
b1bf95bb | 246 | return 0; |
c8dd2771 | 247 | |
c8dd2771 | 248 | argv[0] = hook_name; |
f43cd49f SP |
249 | argv[1] = NULL; |
250 | ||
251 | memset(&proc, 0, sizeof(proc)); | |
252 | proc.argv = argv; | |
253 | proc.in = -1; | |
254 | proc.stdout_to_stderr = 1; | |
255 | ||
6d525d38 SP |
256 | if (use_sideband) { |
257 | memset(&muxer, 0, sizeof(muxer)); | |
258 | muxer.proc = copy_to_sideband; | |
259 | muxer.in = -1; | |
260 | code = start_async(&muxer); | |
261 | if (code) | |
262 | return code; | |
263 | proc.err = muxer.in; | |
264 | } | |
265 | ||
f43cd49f | 266 | code = start_command(&proc); |
6d525d38 SP |
267 | if (code) { |
268 | if (use_sideband) | |
269 | finish_async(&muxer); | |
90e41a89 | 270 | return code; |
6d525d38 SP |
271 | } |
272 | ||
9684e44a JH |
273 | while (1) { |
274 | const char *buf; | |
275 | size_t n; | |
276 | if (feed(feed_state, &buf, &n)) | |
277 | break; | |
278 | if (write_in_full(proc.in, buf, n) != n) | |
279 | break; | |
c8dd2771 | 280 | } |
e72ae288 | 281 | close(proc.in); |
6d525d38 SP |
282 | if (use_sideband) |
283 | finish_async(&muxer); | |
90e41a89 | 284 | return finish_command(&proc); |
b1bf95bb JW |
285 | } |
286 | ||
9684e44a JH |
287 | struct receive_hook_feed_state { |
288 | struct command *cmd; | |
cdc2b2f3 | 289 | int skip_broken; |
9684e44a JH |
290 | struct strbuf buf; |
291 | }; | |
292 | ||
293 | static int feed_receive_hook(void *state_, const char **bufp, size_t *sizep) | |
294 | { | |
295 | struct receive_hook_feed_state *state = state_; | |
296 | struct command *cmd = state->cmd; | |
297 | ||
cdc2b2f3 JH |
298 | while (cmd && |
299 | state->skip_broken && (cmd->error_string || cmd->did_not_exist)) | |
9684e44a JH |
300 | cmd = cmd->next; |
301 | if (!cmd) | |
302 | return -1; /* EOF */ | |
303 | strbuf_reset(&state->buf); | |
304 | strbuf_addf(&state->buf, "%s %s %s\n", | |
305 | sha1_to_hex(cmd->old_sha1), sha1_to_hex(cmd->new_sha1), | |
306 | cmd->ref_name); | |
307 | state->cmd = cmd->next; | |
308 | if (bufp) { | |
309 | *bufp = state->buf.buf; | |
310 | *sizep = state->buf.len; | |
311 | } | |
312 | return 0; | |
313 | } | |
314 | ||
cdc2b2f3 JH |
315 | static int run_receive_hook(struct command *commands, const char *hook_name, |
316 | int skip_broken) | |
9684e44a JH |
317 | { |
318 | struct receive_hook_feed_state state; | |
319 | int status; | |
320 | ||
321 | strbuf_init(&state.buf, 0); | |
322 | state.cmd = commands; | |
cdc2b2f3 | 323 | state.skip_broken = skip_broken; |
9684e44a JH |
324 | if (feed_receive_hook(&state, NULL, NULL)) |
325 | return 0; | |
326 | state.cmd = commands; | |
327 | status = run_and_feed_hook(hook_name, feed_receive_hook, &state); | |
328 | strbuf_release(&state.buf); | |
329 | return status; | |
330 | } | |
331 | ||
1d9e8b56 SP |
332 | static int run_update_hook(struct command *cmd) |
333 | { | |
334 | static const char update_hook[] = "hooks/update"; | |
1d9e8b56 | 335 | const char *argv[5]; |
6d525d38 SP |
336 | struct child_process proc; |
337 | int code; | |
1d9e8b56 SP |
338 | |
339 | if (access(update_hook, X_OK) < 0) | |
340 | return 0; | |
341 | ||
342 | argv[0] = update_hook; | |
343 | argv[1] = cmd->ref_name; | |
344 | argv[2] = sha1_to_hex(cmd->old_sha1); | |
345 | argv[3] = sha1_to_hex(cmd->new_sha1); | |
346 | argv[4] = NULL; | |
347 | ||
6d525d38 SP |
348 | memset(&proc, 0, sizeof(proc)); |
349 | proc.no_stdin = 1; | |
350 | proc.stdout_to_stderr = 1; | |
351 | proc.err = use_sideband ? -1 : 0; | |
352 | proc.argv = argv; | |
353 | ||
354 | code = start_command(&proc); | |
355 | if (code) | |
356 | return code; | |
357 | if (use_sideband) | |
358 | copy_to_sideband(proc.err, -1, NULL); | |
359 | return finish_command(&proc); | |
1d9e8b56 SP |
360 | } |
361 | ||
986e8239 JK |
362 | static int is_ref_checked_out(const char *ref) |
363 | { | |
986e8239 JK |
364 | if (is_bare_repository()) |
365 | return 0; | |
366 | ||
747ca245 | 367 | if (!head_name) |
986e8239 | 368 | return 0; |
747ca245 | 369 | return !strcmp(head_name, ref); |
986e8239 JK |
370 | } |
371 | ||
acd2a45b JH |
372 | static char *refuse_unconfigured_deny_msg[] = { |
373 | "By default, updating the current branch in a non-bare repository", | |
374 | "is denied, because it will make the index and work tree inconsistent", | |
375 | "with what you pushed, and will require 'git reset --hard' to match", | |
376 | "the work tree to HEAD.", | |
3d95d92b JH |
377 | "", |
378 | "You can set 'receive.denyCurrentBranch' configuration variable to", | |
acd2a45b JH |
379 | "'ignore' or 'warn' in the remote repository to allow pushing into", |
380 | "its current branch; however, this is not recommended unless you", | |
381 | "arranged to update its work tree to match what you pushed in some", | |
382 | "other way.", | |
3d95d92b | 383 | "", |
acd2a45b JH |
384 | "To squelch this message and still keep the default behaviour, set", |
385 | "'receive.denyCurrentBranch' configuration variable to 'refuse'." | |
3d95d92b JH |
386 | }; |
387 | ||
acd2a45b | 388 | static void refuse_unconfigured_deny(void) |
3d95d92b JH |
389 | { |
390 | int i; | |
acd2a45b | 391 | for (i = 0; i < ARRAY_SIZE(refuse_unconfigured_deny_msg); i++) |
a886ba28 | 392 | rp_error("%s", refuse_unconfigured_deny_msg[i]); |
3d95d92b JH |
393 | } |
394 | ||
375881fa JH |
395 | static char *refuse_unconfigured_deny_delete_current_msg[] = { |
396 | "By default, deleting the current branch is denied, because the next", | |
397 | "'git clone' won't result in any file checked out, causing confusion.", | |
747ca245 JH |
398 | "", |
399 | "You can set 'receive.denyDeleteCurrent' configuration variable to", | |
375881fa JH |
400 | "'warn' or 'ignore' in the remote repository to allow deleting the", |
401 | "current branch, with or without a warning message.", | |
747ca245 | 402 | "", |
375881fa | 403 | "To squelch this message, you can set it to 'refuse'." |
747ca245 JH |
404 | }; |
405 | ||
375881fa | 406 | static void refuse_unconfigured_deny_delete_current(void) |
747ca245 JH |
407 | { |
408 | int i; | |
409 | for (i = 0; | |
375881fa | 410 | i < ARRAY_SIZE(refuse_unconfigured_deny_delete_current_msg); |
747ca245 | 411 | i++) |
a886ba28 | 412 | rp_error("%s", refuse_unconfigured_deny_delete_current_msg[i]); |
747ca245 JH |
413 | } |
414 | ||
8aaf7d64 | 415 | static const char *update(struct command *cmd) |
2eca23da | 416 | { |
cfee10a7 | 417 | const char *name = cmd->ref_name; |
6b01ecfe JT |
418 | struct strbuf namespaced_name_buf = STRBUF_INIT; |
419 | const char *namespaced_name; | |
cfee10a7 JH |
420 | unsigned char *old_sha1 = cmd->old_sha1; |
421 | unsigned char *new_sha1 = cmd->new_sha1; | |
3159c8dc | 422 | struct ref_lock *lock; |
2eca23da | 423 | |
061d6b9a | 424 | /* only refs/... are allowed */ |
8d9c5010 | 425 | if (prefixcmp(name, "refs/") || check_refname_format(name + 5, 0)) { |
466dbc42 | 426 | rp_error("refusing to create funny ref '%s' remotely", name); |
8aaf7d64 | 427 | return "funny refname"; |
cfee10a7 | 428 | } |
d8a1deec | 429 | |
6b01ecfe JT |
430 | strbuf_addf(&namespaced_name_buf, "%s%s", get_git_namespace(), name); |
431 | namespaced_name = strbuf_detach(&namespaced_name_buf, NULL); | |
432 | ||
433 | if (is_ref_checked_out(namespaced_name)) { | |
3d95d92b JH |
434 | switch (deny_current_branch) { |
435 | case DENY_IGNORE: | |
986e8239 | 436 | break; |
3d95d92b | 437 | case DENY_WARN: |
466dbc42 | 438 | rp_warning("updating the current branch"); |
986e8239 | 439 | break; |
3d95d92b | 440 | case DENY_REFUSE: |
acd2a45b | 441 | case DENY_UNCONFIGURED: |
466dbc42 | 442 | rp_error("refusing to update checked out branch: %s", name); |
acd2a45b JH |
443 | if (deny_current_branch == DENY_UNCONFIGURED) |
444 | refuse_unconfigured_deny(); | |
3d95d92b JH |
445 | return "branch is currently checked out"; |
446 | } | |
986e8239 JK |
447 | } |
448 | ||
d4f694ba | 449 | if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) { |
8aaf7d64 SP |
450 | error("unpack should have generated %s, " |
451 | "but I can't find it!", sha1_to_hex(new_sha1)); | |
452 | return "bad pack"; | |
cfee10a7 | 453 | } |
747ca245 JH |
454 | |
455 | if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) { | |
456 | if (deny_deletes && !prefixcmp(name, "refs/heads/")) { | |
466dbc42 | 457 | rp_error("denying ref deletion for %s", name); |
747ca245 JH |
458 | return "deletion prohibited"; |
459 | } | |
460 | ||
6b01ecfe | 461 | if (!strcmp(namespaced_name, head_name)) { |
747ca245 JH |
462 | switch (deny_delete_current) { |
463 | case DENY_IGNORE: | |
464 | break; | |
465 | case DENY_WARN: | |
466dbc42 | 466 | rp_warning("deleting the current branch"); |
747ca245 JH |
467 | break; |
468 | case DENY_REFUSE: | |
375881fa JH |
469 | case DENY_UNCONFIGURED: |
470 | if (deny_delete_current == DENY_UNCONFIGURED) | |
471 | refuse_unconfigured_deny_delete_current(); | |
466dbc42 | 472 | rp_error("refusing to delete the current branch: %s", name); |
747ca245 JH |
473 | return "deletion of the current branch prohibited"; |
474 | } | |
475 | } | |
a240de11 | 476 | } |
747ca245 | 477 | |
d4f694ba | 478 | if (deny_non_fast_forwards && !is_null_sha1(new_sha1) && |
ba988a83 | 479 | !is_null_sha1(old_sha1) && |
cc44c765 | 480 | !prefixcmp(name, "refs/heads/")) { |
eab82707 | 481 | struct object *old_object, *new_object; |
11031d7e | 482 | struct commit *old_commit, *new_commit; |
11031d7e | 483 | |
eab82707 MK |
484 | old_object = parse_object(old_sha1); |
485 | new_object = parse_object(new_sha1); | |
486 | ||
487 | if (!old_object || !new_object || | |
488 | old_object->type != OBJ_COMMIT || | |
489 | new_object->type != OBJ_COMMIT) { | |
490 | error("bad sha1 objects for %s", name); | |
491 | return "bad ref"; | |
492 | } | |
493 | old_commit = (struct commit *)old_object; | |
494 | new_commit = (struct commit *)new_object; | |
5d55915c | 495 | if (!in_merge_bases(old_commit, new_commit)) { |
466dbc42 SP |
496 | rp_error("denying non-fast-forward %s" |
497 | " (you should pull first)", name); | |
a75d7b54 | 498 | return "non-fast-forward"; |
8aaf7d64 | 499 | } |
11031d7e | 500 | } |
1d9e8b56 | 501 | if (run_update_hook(cmd)) { |
466dbc42 | 502 | rp_error("hook declined to update %s", name); |
8aaf7d64 | 503 | return "hook declined"; |
b1bf95bb | 504 | } |
3159c8dc | 505 | |
d4f694ba | 506 | if (is_null_sha1(new_sha1)) { |
28391a80 | 507 | if (!parse_object(old_sha1)) { |
28391a80 | 508 | old_sha1 = NULL; |
160b81ed PYH |
509 | if (ref_exists(name)) { |
510 | rp_warning("Allowing deletion of corrupt ref."); | |
511 | } else { | |
512 | rp_warning("Deleting a non-existent ref."); | |
513 | cmd->did_not_exist = 1; | |
514 | } | |
28391a80 | 515 | } |
6b01ecfe | 516 | if (delete_ref(namespaced_name, old_sha1, 0)) { |
466dbc42 | 517 | rp_error("failed to delete %s", name); |
8aaf7d64 | 518 | return "failed to delete"; |
d4f694ba | 519 | } |
8aaf7d64 | 520 | return NULL; /* good */ |
d4f694ba JH |
521 | } |
522 | else { | |
6b01ecfe | 523 | lock = lock_any_ref_for_update(namespaced_name, old_sha1, 0); |
d4f694ba | 524 | if (!lock) { |
466dbc42 | 525 | rp_error("failed to lock %s", name); |
8aaf7d64 | 526 | return "failed to lock"; |
d4f694ba | 527 | } |
ef203f08 | 528 | if (write_ref_sha1(lock, new_sha1, "push")) { |
8aaf7d64 | 529 | return "failed to write"; /* error() already called */ |
ef203f08 | 530 | } |
8aaf7d64 | 531 | return NULL; /* good */ |
19614330 | 532 | } |
2eca23da LT |
533 | } |
534 | ||
19614330 JH |
535 | static char update_post_hook[] = "hooks/post-update"; |
536 | ||
5e1c71fd | 537 | static void run_update_post_hook(struct command *commands) |
19614330 | 538 | { |
5e1c71fd | 539 | struct command *cmd; |
6d525d38 | 540 | int argc; |
9201c707 | 541 | const char **argv; |
6d525d38 | 542 | struct child_process proc; |
19614330 | 543 | |
5e1c71fd | 544 | for (argc = 0, cmd = commands; cmd; cmd = cmd->next) { |
160b81ed | 545 | if (cmd->error_string || cmd->did_not_exist) |
19614330 JH |
546 | continue; |
547 | argc++; | |
548 | } | |
3e6e152c SP |
549 | if (!argc || access(update_post_hook, X_OK) < 0) |
550 | return; | |
551 | argv = xmalloc(sizeof(*argv) * (2 + argc)); | |
19614330 JH |
552 | argv[0] = update_post_hook; |
553 | ||
5e1c71fd | 554 | for (argc = 1, cmd = commands; cmd; cmd = cmd->next) { |
9201c707 | 555 | char *p; |
160b81ed | 556 | if (cmd->error_string || cmd->did_not_exist) |
19614330 | 557 | continue; |
5e1c71fd JS |
558 | p = xmalloc(strlen(cmd->ref_name) + 1); |
559 | strcpy(p, cmd->ref_name); | |
9201c707 | 560 | argv[argc] = p; |
19614330 JH |
561 | argc++; |
562 | } | |
563 | argv[argc] = NULL; | |
6d525d38 SP |
564 | |
565 | memset(&proc, 0, sizeof(proc)); | |
566 | proc.no_stdin = 1; | |
567 | proc.stdout_to_stderr = 1; | |
568 | proc.err = use_sideband ? -1 : 0; | |
569 | proc.argv = argv; | |
570 | ||
571 | if (!start_command(&proc)) { | |
572 | if (use_sideband) | |
573 | copy_to_sideband(proc.err, -1, NULL); | |
574 | finish_command(&proc); | |
575 | } | |
19614330 | 576 | } |
2eca23da | 577 | |
da3efdb1 JS |
578 | static void check_aliased_update(struct command *cmd, struct string_list *list) |
579 | { | |
6b01ecfe JT |
580 | struct strbuf buf = STRBUF_INIT; |
581 | const char *dst_name; | |
da3efdb1 JS |
582 | struct string_list_item *item; |
583 | struct command *dst_cmd; | |
584 | unsigned char sha1[20]; | |
585 | char cmd_oldh[41], cmd_newh[41], dst_oldh[41], dst_newh[41]; | |
586 | int flag; | |
587 | ||
6b01ecfe | 588 | strbuf_addf(&buf, "%s%s", get_git_namespace(), cmd->ref_name); |
8cad4744 | 589 | dst_name = resolve_ref_unsafe(buf.buf, sha1, 0, &flag); |
6b01ecfe | 590 | strbuf_release(&buf); |
da3efdb1 JS |
591 | |
592 | if (!(flag & REF_ISSYMREF)) | |
593 | return; | |
594 | ||
6b01ecfe JT |
595 | dst_name = strip_namespace(dst_name); |
596 | if (!dst_name) { | |
597 | rp_error("refusing update to broken symref '%s'", cmd->ref_name); | |
598 | cmd->skip_update = 1; | |
599 | cmd->error_string = "broken symref"; | |
600 | return; | |
601 | } | |
602 | ||
e8c8b713 | 603 | if ((item = string_list_lookup(list, dst_name)) == NULL) |
da3efdb1 JS |
604 | return; |
605 | ||
606 | cmd->skip_update = 1; | |
607 | ||
608 | dst_cmd = (struct command *) item->util; | |
609 | ||
610 | if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) && | |
611 | !hashcmp(cmd->new_sha1, dst_cmd->new_sha1)) | |
612 | return; | |
613 | ||
614 | dst_cmd->skip_update = 1; | |
615 | ||
616 | strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV)); | |
0e71bc30 | 617 | strcpy(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 | 618 | strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV)); |
0e71bc30 | 619 | strcpy(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 JS |
620 | rp_error("refusing inconsistent update between symref '%s' (%s..%s) and" |
621 | " its target '%s' (%s..%s)", | |
622 | cmd->ref_name, cmd_oldh, cmd_newh, | |
623 | dst_cmd->ref_name, dst_oldh, dst_newh); | |
624 | ||
625 | cmd->error_string = dst_cmd->error_string = | |
626 | "inconsistent aliased update"; | |
627 | } | |
628 | ||
629 | static void check_aliased_updates(struct command *commands) | |
630 | { | |
631 | struct command *cmd; | |
183113a5 | 632 | struct string_list ref_list = STRING_LIST_INIT_NODUP; |
da3efdb1 JS |
633 | |
634 | for (cmd = commands; cmd; cmd = cmd->next) { | |
635 | struct string_list_item *item = | |
1d2f80fa | 636 | string_list_append(&ref_list, cmd->ref_name); |
da3efdb1 JS |
637 | item->util = (void *)cmd; |
638 | } | |
639 | sort_string_list(&ref_list); | |
640 | ||
ef7e93d9 CB |
641 | for (cmd = commands; cmd; cmd = cmd->next) { |
642 | if (!cmd->error_string) | |
643 | check_aliased_update(cmd, &ref_list); | |
644 | } | |
da3efdb1 JS |
645 | |
646 | string_list_clear(&ref_list, 0); | |
647 | } | |
648 | ||
52fed6e1 JH |
649 | static int command_singleton_iterator(void *cb_data, unsigned char sha1[20]) |
650 | { | |
651 | struct command **cmd_list = cb_data; | |
652 | struct command *cmd = *cmd_list; | |
653 | ||
ee6dfb2d | 654 | if (!cmd || is_null_sha1(cmd->new_sha1)) |
52fed6e1 JH |
655 | return -1; /* end of list */ |
656 | *cmd_list = NULL; /* this returns only one */ | |
657 | hashcpy(sha1, cmd->new_sha1); | |
658 | return 0; | |
659 | } | |
660 | ||
661 | static void set_connectivity_errors(struct command *commands) | |
662 | { | |
663 | struct command *cmd; | |
664 | ||
665 | for (cmd = commands; cmd; cmd = cmd->next) { | |
666 | struct command *singleton = cmd; | |
667 | if (!check_everything_connected(command_singleton_iterator, | |
668 | 0, &singleton)) | |
669 | continue; | |
670 | cmd->error_string = "missing necessary objects"; | |
671 | } | |
672 | } | |
673 | ||
674 | static int iterate_receive_command_list(void *cb_data, unsigned char sha1[20]) | |
675 | { | |
676 | struct command **cmd_list = cb_data; | |
677 | struct command *cmd = *cmd_list; | |
678 | ||
ee6dfb2d JH |
679 | while (cmd) { |
680 | if (!is_null_sha1(cmd->new_sha1)) { | |
681 | hashcpy(sha1, cmd->new_sha1); | |
682 | *cmd_list = cmd->next; | |
683 | return 0; | |
684 | } | |
685 | cmd = cmd->next; | |
686 | } | |
687 | *cmd_list = NULL; | |
688 | return -1; /* end of list */ | |
52fed6e1 JH |
689 | } |
690 | ||
5e1c71fd | 691 | static void execute_commands(struct command *commands, const char *unpacker_error) |
575f4974 | 692 | { |
5e1c71fd | 693 | struct command *cmd; |
747ca245 | 694 | unsigned char sha1[20]; |
8aaf7d64 SP |
695 | |
696 | if (unpacker_error) { | |
5e1c71fd | 697 | for (cmd = commands; cmd; cmd = cmd->next) |
74eb32d3 | 698 | cmd->error_string = "unpacker error"; |
8aaf7d64 SP |
699 | return; |
700 | } | |
701 | ||
52fed6e1 JH |
702 | cmd = commands; |
703 | if (check_everything_connected(iterate_receive_command_list, | |
704 | 0, &cmd)) | |
705 | set_connectivity_errors(commands); | |
706 | ||
cdc2b2f3 | 707 | if (run_receive_hook(commands, pre_receive_hook, 0)) { |
ef7e93d9 CB |
708 | for (cmd = commands; cmd; cmd = cmd->next) { |
709 | if (!cmd->error_string) | |
710 | cmd->error_string = "pre-receive hook declined"; | |
711 | } | |
05ef58ec SP |
712 | return; |
713 | } | |
714 | ||
da3efdb1 JS |
715 | check_aliased_updates(commands); |
716 | ||
96ec7b1e NTND |
717 | free(head_name_to_free); |
718 | head_name = head_name_to_free = resolve_refdup("HEAD", sha1, 0, NULL); | |
747ca245 | 719 | |
ef7e93d9 CB |
720 | for (cmd = commands; cmd; cmd = cmd->next) { |
721 | if (cmd->error_string) | |
722 | continue; | |
723 | ||
724 | if (cmd->skip_update) | |
725 | continue; | |
726 | ||
727 | cmd->error_string = update(cmd); | |
728 | } | |
575f4974 LT |
729 | } |
730 | ||
5e1c71fd | 731 | static struct command *read_head_info(void) |
575f4974 | 732 | { |
5e1c71fd | 733 | struct command *commands = NULL; |
eb1af2df | 734 | struct command **p = &commands; |
575f4974 LT |
735 | for (;;) { |
736 | static char line[1000]; | |
eb1af2df LT |
737 | unsigned char old_sha1[20], new_sha1[20]; |
738 | struct command *cmd; | |
cfee10a7 JH |
739 | char *refname; |
740 | int len, reflen; | |
eb1af2df LT |
741 | |
742 | len = packet_read_line(0, line, sizeof(line)); | |
575f4974 LT |
743 | if (!len) |
744 | break; | |
eb1af2df LT |
745 | if (line[len-1] == '\n') |
746 | line[--len] = 0; | |
747 | if (len < 83 || | |
748 | line[40] != ' ' || | |
749 | line[81] != ' ' || | |
750 | get_sha1_hex(line, old_sha1) || | |
751 | get_sha1_hex(line + 41, new_sha1)) | |
cfee10a7 JH |
752 | die("protocol error: expected old/new/ref, got '%s'", |
753 | line); | |
754 | ||
755 | refname = line + 82; | |
756 | reflen = strlen(refname); | |
757 | if (reflen + 82 < len) { | |
f47182c8 JH |
758 | const char *feature_list = refname + reflen + 1; |
759 | if (parse_feature_request(feature_list, "report-status")) | |
cfee10a7 | 760 | report_status = 1; |
f47182c8 | 761 | if (parse_feature_request(feature_list, "side-band-64k")) |
38a81b4e | 762 | use_sideband = LARGE_PACKET_MAX; |
c207e34f CB |
763 | if (parse_feature_request(feature_list, "quiet")) |
764 | quiet = 1; | |
cfee10a7 | 765 | } |
da3efdb1 | 766 | cmd = xcalloc(1, sizeof(struct command) + len - 80); |
e702496e SP |
767 | hashcpy(cmd->old_sha1, old_sha1); |
768 | hashcpy(cmd->new_sha1, new_sha1); | |
eb1af2df | 769 | memcpy(cmd->ref_name, line + 82, len - 81); |
eb1af2df LT |
770 | *p = cmd; |
771 | p = &cmd->next; | |
575f4974 | 772 | } |
5e1c71fd | 773 | return commands; |
575f4974 LT |
774 | } |
775 | ||
fc04c412 SP |
776 | static const char *parse_pack_header(struct pack_header *hdr) |
777 | { | |
a69e5429 JH |
778 | switch (read_pack_header(0, hdr)) { |
779 | case PH_ERROR_EOF: | |
780 | return "eof before pack header was fully read"; | |
781 | ||
782 | case PH_ERROR_PACK_SIGNATURE: | |
fc04c412 | 783 | return "protocol error (pack signature mismatch detected)"; |
a69e5429 JH |
784 | |
785 | case PH_ERROR_PROTOCOL: | |
fc04c412 | 786 | return "protocol error (pack version unsupported)"; |
a69e5429 JH |
787 | |
788 | default: | |
789 | return "unknown error in parse_pack_header"; | |
790 | ||
791 | case 0: | |
792 | return NULL; | |
793 | } | |
fc04c412 SP |
794 | } |
795 | ||
576162a4 NP |
796 | static const char *pack_lockfile; |
797 | ||
a22e6f85 | 798 | static const char *unpack(int err_fd) |
575f4974 | 799 | { |
fc04c412 SP |
800 | struct pack_header hdr; |
801 | const char *hdr_err; | |
802 | char hdr_arg[38]; | |
dab76d3a JH |
803 | int fsck_objects = (receive_fsck_objects >= 0 |
804 | ? receive_fsck_objects | |
805 | : transfer_fsck_objects >= 0 | |
806 | ? transfer_fsck_objects | |
807 | : 0); | |
fc04c412 SP |
808 | |
809 | hdr_err = parse_pack_header(&hdr); | |
810 | if (hdr_err) | |
811 | return hdr_err; | |
6e1c2344 RJ |
812 | snprintf(hdr_arg, sizeof(hdr_arg), |
813 | "--pack_header=%"PRIu32",%"PRIu32, | |
fc04c412 SP |
814 | ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries)); |
815 | ||
816 | if (ntohl(hdr.hdr_entries) < unpack_limit) { | |
20dc0016 | 817 | int code, i = 0; |
59bfdfb8 | 818 | struct child_process child; |
c207e34f | 819 | const char *unpacker[5]; |
20dc0016 | 820 | unpacker[i++] = "unpack-objects"; |
c207e34f CB |
821 | if (quiet) |
822 | unpacker[i++] = "-q"; | |
dab76d3a | 823 | if (fsck_objects) |
20dc0016 MK |
824 | unpacker[i++] = "--strict"; |
825 | unpacker[i++] = hdr_arg; | |
826 | unpacker[i++] = NULL; | |
59bfdfb8 JK |
827 | memset(&child, 0, sizeof(child)); |
828 | child.argv = unpacker; | |
829 | child.no_stdout = 1; | |
a22e6f85 | 830 | child.err = err_fd; |
59bfdfb8 JK |
831 | child.git_cmd = 1; |
832 | code = run_command(&child); | |
2ff4d1ab | 833 | if (!code) |
fc04c412 | 834 | return NULL; |
2ff4d1ab | 835 | return "unpack-objects abnormal exit"; |
576162a4 | 836 | } else { |
20dc0016 MK |
837 | const char *keeper[7]; |
838 | int s, status, i = 0; | |
576162a4 | 839 | char keep_arg[256]; |
e8016abf | 840 | struct child_process ip; |
576162a4 | 841 | |
85e72830 | 842 | s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid()); |
576162a4 NP |
843 | if (gethostname(keep_arg + s, sizeof(keep_arg) - s)) |
844 | strcpy(keep_arg + s, "localhost"); | |
845 | ||
20dc0016 MK |
846 | keeper[i++] = "index-pack"; |
847 | keeper[i++] = "--stdin"; | |
dab76d3a | 848 | if (fsck_objects) |
20dc0016 MK |
849 | keeper[i++] = "--strict"; |
850 | keeper[i++] = "--fix-thin"; | |
851 | keeper[i++] = hdr_arg; | |
852 | keeper[i++] = keep_arg; | |
853 | keeper[i++] = NULL; | |
e8016abf SP |
854 | memset(&ip, 0, sizeof(ip)); |
855 | ip.argv = keeper; | |
856 | ip.out = -1; | |
a22e6f85 | 857 | ip.err = err_fd; |
e8016abf | 858 | ip.git_cmd = 1; |
2ff4d1ab JS |
859 | status = start_command(&ip); |
860 | if (status) { | |
576162a4 | 861 | return "index-pack fork failed"; |
2ff4d1ab | 862 | } |
106764e6 | 863 | pack_lockfile = index_pack_lockfile(ip.out); |
e72ae288 | 864 | close(ip.out); |
e8016abf SP |
865 | status = finish_command(&ip); |
866 | if (!status) { | |
576162a4 NP |
867 | reprepare_packed_git(); |
868 | return NULL; | |
869 | } | |
870 | return "index-pack abnormal exit"; | |
cfee10a7 JH |
871 | } |
872 | } | |
873 | ||
a22e6f85 JK |
874 | static const char *unpack_with_sideband(void) |
875 | { | |
876 | struct async muxer; | |
877 | const char *ret; | |
878 | ||
879 | if (!use_sideband) | |
880 | return unpack(0); | |
881 | ||
882 | memset(&muxer, 0, sizeof(muxer)); | |
883 | muxer.proc = copy_to_sideband; | |
884 | muxer.in = -1; | |
885 | if (start_async(&muxer)) | |
886 | return NULL; | |
887 | ||
888 | ret = unpack(muxer.in); | |
889 | ||
890 | finish_async(&muxer); | |
891 | return ret; | |
892 | } | |
893 | ||
5e1c71fd | 894 | static void report(struct command *commands, const char *unpack_status) |
cfee10a7 JH |
895 | { |
896 | struct command *cmd; | |
38a81b4e SP |
897 | struct strbuf buf = STRBUF_INIT; |
898 | ||
899 | packet_buf_write(&buf, "unpack %s\n", | |
900 | unpack_status ? unpack_status : "ok"); | |
cfee10a7 JH |
901 | for (cmd = commands; cmd; cmd = cmd->next) { |
902 | if (!cmd->error_string) | |
38a81b4e SP |
903 | packet_buf_write(&buf, "ok %s\n", |
904 | cmd->ref_name); | |
cfee10a7 | 905 | else |
38a81b4e SP |
906 | packet_buf_write(&buf, "ng %s %s\n", |
907 | cmd->ref_name, cmd->error_string); | |
575f4974 | 908 | } |
38a81b4e SP |
909 | packet_buf_flush(&buf); |
910 | ||
911 | if (use_sideband) | |
912 | send_sideband(1, 1, buf.buf, buf.len, use_sideband); | |
913 | else | |
914 | safe_write(1, buf.buf, buf.len); | |
915 | strbuf_release(&buf); | |
575f4974 LT |
916 | } |
917 | ||
5e1c71fd | 918 | static int delete_only(struct command *commands) |
d4f694ba | 919 | { |
5e1c71fd JS |
920 | struct command *cmd; |
921 | for (cmd = commands; cmd; cmd = cmd->next) { | |
d4f694ba JH |
922 | if (!is_null_sha1(cmd->new_sha1)) |
923 | return 0; | |
d4f694ba JH |
924 | } |
925 | return 1; | |
926 | } | |
927 | ||
be5908ae | 928 | int cmd_receive_pack(int argc, const char **argv, const char *prefix) |
575f4974 | 929 | { |
42526b47 SP |
930 | int advertise_refs = 0; |
931 | int stateless_rpc = 0; | |
d0efc8a7 | 932 | int i; |
8d630132 | 933 | char *dir = NULL; |
5e1c71fd | 934 | struct command *commands; |
575f4974 | 935 | |
bbc30f99 JK |
936 | packet_trace_identity("receive-pack"); |
937 | ||
575f4974 LT |
938 | argv++; |
939 | for (i = 1; i < argc; i++) { | |
be5908ae | 940 | const char *arg = *argv++; |
575f4974 LT |
941 | |
942 | if (*arg == '-') { | |
c207e34f CB |
943 | if (!strcmp(arg, "--quiet")) { |
944 | quiet = 1; | |
945 | continue; | |
946 | } | |
947 | ||
42526b47 SP |
948 | if (!strcmp(arg, "--advertise-refs")) { |
949 | advertise_refs = 1; | |
950 | continue; | |
951 | } | |
952 | if (!strcmp(arg, "--stateless-rpc")) { | |
953 | stateless_rpc = 1; | |
954 | continue; | |
955 | } | |
956 | ||
575f4974 LT |
957 | usage(receive_pack_usage); |
958 | } | |
d0efc8a7 LT |
959 | if (dir) |
960 | usage(receive_pack_usage); | |
be5908ae | 961 | dir = xstrdup(arg); |
575f4974 LT |
962 | } |
963 | if (!dir) | |
964 | usage(receive_pack_usage); | |
965 | ||
e1464ca7 | 966 | setup_path(); |
5c09f321 | 967 | |
3159c8dc | 968 | if (!enter_repo(dir, 0)) |
05ac6b34 | 969 | die("'%s' does not appear to be a git repository", dir); |
575f4974 | 970 | |
a0022eeb JH |
971 | if (is_repository_shallow()) |
972 | die("attempt to push into a shallow repository"); | |
973 | ||
ef90d6d4 | 974 | git_config(receive_pack_config, NULL); |
6fb75bed | 975 | |
e28714c5 JH |
976 | if (0 <= transfer_unpack_limit) |
977 | unpack_limit = transfer_unpack_limit; | |
978 | else if (0 <= receive_unpack_limit) | |
979 | unpack_limit = receive_unpack_limit; | |
980 | ||
42526b47 | 981 | if (advertise_refs || !stateless_rpc) { |
42526b47 | 982 | write_head_info(); |
42526b47 SP |
983 | } |
984 | if (advertise_refs) | |
985 | return 0; | |
575f4974 | 986 | |
5e1c71fd | 987 | if ((commands = read_head_info()) != NULL) { |
d4f694ba JH |
988 | const char *unpack_status = NULL; |
989 | ||
990 | if (!delete_only(commands)) | |
a22e6f85 | 991 | unpack_status = unpack_with_sideband(); |
5e1c71fd | 992 | execute_commands(commands, unpack_status); |
576162a4 | 993 | if (pack_lockfile) |
691f1a28 | 994 | unlink_or_warn(pack_lockfile); |
cfee10a7 | 995 | if (report_status) |
5e1c71fd | 996 | report(commands, unpack_status); |
cdc2b2f3 | 997 | run_receive_hook(commands, post_receive_hook, 1); |
8e663d9e | 998 | run_update_post_hook(commands); |
77e3efbf JH |
999 | if (auto_gc) { |
1000 | const char *argv_gc_auto[] = { | |
1001 | "gc", "--auto", "--quiet", NULL, | |
1002 | }; | |
4b7f2fa4 JH |
1003 | int opt = RUN_GIT_CMD | RUN_COMMAND_STDOUT_TO_STDERR; |
1004 | run_command_v_opt(argv_gc_auto, opt); | |
77e3efbf JH |
1005 | } |
1006 | if (auto_update_server_info) | |
1007 | update_server_info(0); | |
7f8e9828 | 1008 | } |
38a81b4e SP |
1009 | if (use_sideband) |
1010 | packet_flush(1); | |
575f4974 LT |
1011 | return 0; |
1012 | } |