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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" |
575f4974 | 15 | |
34263de0 | 16 | static const char receive_pack_usage[] = "git receive-pack <git-dir>"; |
575f4974 | 17 | |
986e8239 | 18 | enum deny_action { |
3d95d92b | 19 | DENY_UNCONFIGURED, |
986e8239 JK |
20 | DENY_IGNORE, |
21 | DENY_WARN, | |
4b05548f | 22 | DENY_REFUSE |
986e8239 JK |
23 | }; |
24 | ||
1b53a076 JH |
25 | static int deny_deletes; |
26 | static int deny_non_fast_forwards; | |
3d95d92b | 27 | static enum deny_action deny_current_branch = DENY_UNCONFIGURED; |
747ca245 | 28 | static enum deny_action deny_delete_current = DENY_UNCONFIGURED; |
dab76d3a JH |
29 | static int receive_fsck_objects = -1; |
30 | static int transfer_fsck_objects = -1; | |
e28714c5 JH |
31 | static int receive_unpack_limit = -1; |
32 | static int transfer_unpack_limit = -1; | |
46732fae | 33 | static int unpack_limit = 100; |
96f1e58f | 34 | static int report_status; |
38a81b4e | 35 | static int use_sideband; |
c207e34f | 36 | static int quiet; |
b74fce16 | 37 | static int prefer_ofs_delta = 1; |
77e3efbf JH |
38 | static int auto_update_server_info; |
39 | static int auto_gc = 1; | |
747ca245 | 40 | static const char *head_name; |
96ec7b1e | 41 | static void *head_name_to_free; |
185c04e0 | 42 | static int sent_capabilities; |
cfee10a7 | 43 | |
986e8239 JK |
44 | static enum deny_action parse_deny_action(const char *var, const char *value) |
45 | { | |
46 | if (value) { | |
47 | if (!strcasecmp(value, "ignore")) | |
48 | return DENY_IGNORE; | |
49 | if (!strcasecmp(value, "warn")) | |
50 | return DENY_WARN; | |
51 | if (!strcasecmp(value, "refuse")) | |
52 | return DENY_REFUSE; | |
53 | } | |
54 | if (git_config_bool(var, value)) | |
55 | return DENY_REFUSE; | |
56 | return DENY_IGNORE; | |
57 | } | |
58 | ||
ef90d6d4 | 59 | static int receive_pack_config(const char *var, const char *value, void *cb) |
6fb75bed | 60 | { |
a240de11 JK |
61 | if (strcmp(var, "receive.denydeletes") == 0) { |
62 | deny_deletes = git_config_bool(var, value); | |
63 | return 0; | |
64 | } | |
65 | ||
e28714c5 | 66 | if (strcmp(var, "receive.denynonfastforwards") == 0) { |
6fb75bed SP |
67 | deny_non_fast_forwards = git_config_bool(var, value); |
68 | return 0; | |
69 | } | |
70 | ||
e28714c5 JH |
71 | if (strcmp(var, "receive.unpacklimit") == 0) { |
72 | receive_unpack_limit = git_config_int(var, value); | |
fc04c412 SP |
73 | return 0; |
74 | } | |
75 | ||
e28714c5 JH |
76 | if (strcmp(var, "transfer.unpacklimit") == 0) { |
77 | transfer_unpack_limit = git_config_int(var, value); | |
78 | return 0; | |
79 | } | |
80 | ||
20dc0016 MK |
81 | if (strcmp(var, "receive.fsckobjects") == 0) { |
82 | receive_fsck_objects = git_config_bool(var, value); | |
83 | return 0; | |
84 | } | |
85 | ||
dab76d3a JH |
86 | if (strcmp(var, "transfer.fsckobjects") == 0) { |
87 | transfer_fsck_objects = git_config_bool(var, value); | |
88 | return 0; | |
89 | } | |
90 | ||
986e8239 JK |
91 | if (!strcmp(var, "receive.denycurrentbranch")) { |
92 | deny_current_branch = parse_deny_action(var, value); | |
93 | return 0; | |
94 | } | |
95 | ||
747ca245 JH |
96 | if (strcmp(var, "receive.denydeletecurrent") == 0) { |
97 | deny_delete_current = parse_deny_action(var, value); | |
98 | return 0; | |
99 | } | |
100 | ||
b74fce16 NP |
101 | if (strcmp(var, "repack.usedeltabaseoffset") == 0) { |
102 | prefer_ofs_delta = git_config_bool(var, value); | |
103 | return 0; | |
104 | } | |
105 | ||
77e3efbf JH |
106 | if (strcmp(var, "receive.updateserverinfo") == 0) { |
107 | auto_update_server_info = git_config_bool(var, value); | |
108 | return 0; | |
109 | } | |
110 | ||
111 | if (strcmp(var, "receive.autogc") == 0) { | |
112 | auto_gc = git_config_bool(var, value); | |
113 | return 0; | |
114 | } | |
115 | ||
ef90d6d4 | 116 | return git_default_config(var, value, cb); |
6fb75bed SP |
117 | } |
118 | ||
bc98201d | 119 | static void show_ref(const char *path, const unsigned char *sha1) |
575f4974 | 120 | { |
185c04e0 | 121 | if (sent_capabilities) |
cfee10a7 JH |
122 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), path); |
123 | else | |
185c04e0 SP |
124 | packet_write(1, "%s %s%c%s%s\n", |
125 | sha1_to_hex(sha1), path, 0, | |
c207e34f | 126 | " report-status delete-refs side-band-64k quiet", |
185c04e0 SP |
127 | prefer_ofs_delta ? " ofs-delta" : ""); |
128 | sent_capabilities = 1; | |
575f4974 LT |
129 | } |
130 | ||
bc98201d | 131 | static int show_ref_cb(const char *path, const unsigned char *sha1, int flag, void *unused) |
6b01ecfe JT |
132 | { |
133 | path = strip_namespace(path); | |
134 | /* | |
135 | * Advertise refs outside our current namespace as ".have" | |
136 | * refs, so that the client can use them to minimize data | |
137 | * transfer but will otherwise ignore them. This happens to | |
138 | * cover ".have" that are thrown in by add_one_alternate_ref() | |
139 | * to mark histories that are complete in our alternates as | |
140 | * well. | |
141 | */ | |
142 | if (!path) | |
143 | path = ".have"; | |
bc98201d MH |
144 | show_ref(path, sha1); |
145 | return 0; | |
6b01ecfe JT |
146 | } |
147 | ||
85f25104 | 148 | static void show_one_alternate_sha1(const unsigned char sha1[20], void *unused) |
b7a025d9 | 149 | { |
85f25104 | 150 | show_ref(".have", sha1); |
b7a025d9 MH |
151 | } |
152 | ||
153 | static void collect_one_alternate_ref(const struct ref *ref, void *data) | |
154 | { | |
155 | struct sha1_array *sa = data; | |
156 | sha1_array_append(sa, ref->old_sha1); | |
6b01ecfe JT |
157 | } |
158 | ||
8a65ff76 | 159 | static void write_head_info(void) |
575f4974 | 160 | { |
b7a025d9 MH |
161 | struct sha1_array sa = SHA1_ARRAY_INIT; |
162 | for_each_alternate_ref(collect_one_alternate_ref, &sa); | |
85f25104 | 163 | sha1_array_for_each_unique(&sa, show_one_alternate_sha1, NULL); |
b7a025d9 | 164 | sha1_array_clear(&sa); |
6b01ecfe | 165 | for_each_ref(show_ref_cb, NULL); |
185c04e0 | 166 | if (!sent_capabilities) |
bc98201d | 167 | show_ref("capabilities^{}", null_sha1); |
cfee10a7 | 168 | |
b7a025d9 MH |
169 | /* EOF */ |
170 | packet_flush(1); | |
575f4974 LT |
171 | } |
172 | ||
eb1af2df LT |
173 | struct command { |
174 | struct command *next; | |
cfee10a7 | 175 | const char *error_string; |
160b81ed PYH |
176 | unsigned int skip_update:1, |
177 | did_not_exist:1; | |
eb1af2df LT |
178 | unsigned char old_sha1[20]; |
179 | unsigned char new_sha1[20]; | |
8f1d2e6f | 180 | char ref_name[FLEX_ARRAY]; /* more */ |
575f4974 LT |
181 | }; |
182 | ||
05ef58ec SP |
183 | static const char pre_receive_hook[] = "hooks/pre-receive"; |
184 | static const char post_receive_hook[] = "hooks/post-receive"; | |
b1bf95bb | 185 | |
466dbc42 SP |
186 | static void rp_error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
187 | static void rp_warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
188 | ||
189 | static void report_message(const char *prefix, const char *err, va_list params) | |
190 | { | |
191 | int sz = strlen(prefix); | |
192 | char msg[4096]; | |
193 | ||
194 | strncpy(msg, prefix, sz); | |
195 | sz += vsnprintf(msg + sz, sizeof(msg) - sz, err, params); | |
196 | if (sz > (sizeof(msg) - 1)) | |
197 | sz = sizeof(msg) - 1; | |
198 | msg[sz++] = '\n'; | |
199 | ||
200 | if (use_sideband) | |
201 | send_sideband(1, 2, msg, sz, use_sideband); | |
202 | else | |
203 | xwrite(2, msg, sz); | |
204 | } | |
205 | ||
206 | static void rp_warning(const char *err, ...) | |
207 | { | |
208 | va_list params; | |
209 | va_start(params, err); | |
210 | report_message("warning: ", err, params); | |
211 | va_end(params); | |
212 | } | |
213 | ||
214 | static void rp_error(const char *err, ...) | |
215 | { | |
216 | va_list params; | |
217 | va_start(params, err); | |
218 | report_message("error: ", err, params); | |
219 | va_end(params); | |
220 | } | |
221 | ||
6d525d38 SP |
222 | static int copy_to_sideband(int in, int out, void *arg) |
223 | { | |
224 | char data[128]; | |
225 | while (1) { | |
226 | ssize_t sz = xread(in, data, sizeof(data)); | |
227 | if (sz <= 0) | |
228 | break; | |
229 | send_sideband(1, 2, data, sz, use_sideband); | |
230 | } | |
231 | close(in); | |
232 | return 0; | |
233 | } | |
234 | ||
9684e44a JH |
235 | typedef int (*feed_fn)(void *, const char **, size_t *); |
236 | static int run_and_feed_hook(const char *hook_name, feed_fn feed, void *feed_state) | |
b1bf95bb | 237 | { |
f43cd49f | 238 | struct child_process proc; |
6d525d38 | 239 | struct async muxer; |
f43cd49f | 240 | const char *argv[2]; |
9684e44a | 241 | int code; |
b1bf95bb | 242 | |
9684e44a | 243 | if (access(hook_name, X_OK) < 0) |
b1bf95bb | 244 | return 0; |
c8dd2771 | 245 | |
c8dd2771 | 246 | argv[0] = hook_name; |
f43cd49f SP |
247 | argv[1] = NULL; |
248 | ||
249 | memset(&proc, 0, sizeof(proc)); | |
250 | proc.argv = argv; | |
251 | proc.in = -1; | |
252 | proc.stdout_to_stderr = 1; | |
253 | ||
6d525d38 SP |
254 | if (use_sideband) { |
255 | memset(&muxer, 0, sizeof(muxer)); | |
256 | muxer.proc = copy_to_sideband; | |
257 | muxer.in = -1; | |
258 | code = start_async(&muxer); | |
259 | if (code) | |
260 | return code; | |
261 | proc.err = muxer.in; | |
262 | } | |
263 | ||
f43cd49f | 264 | code = start_command(&proc); |
6d525d38 SP |
265 | if (code) { |
266 | if (use_sideband) | |
267 | finish_async(&muxer); | |
90e41a89 | 268 | return code; |
6d525d38 SP |
269 | } |
270 | ||
9684e44a JH |
271 | while (1) { |
272 | const char *buf; | |
273 | size_t n; | |
274 | if (feed(feed_state, &buf, &n)) | |
275 | break; | |
276 | if (write_in_full(proc.in, buf, n) != n) | |
277 | break; | |
c8dd2771 | 278 | } |
e72ae288 | 279 | close(proc.in); |
6d525d38 SP |
280 | if (use_sideband) |
281 | finish_async(&muxer); | |
90e41a89 | 282 | return finish_command(&proc); |
b1bf95bb JW |
283 | } |
284 | ||
9684e44a JH |
285 | struct receive_hook_feed_state { |
286 | struct command *cmd; | |
cdc2b2f3 | 287 | int skip_broken; |
9684e44a JH |
288 | struct strbuf buf; |
289 | }; | |
290 | ||
291 | static int feed_receive_hook(void *state_, const char **bufp, size_t *sizep) | |
292 | { | |
293 | struct receive_hook_feed_state *state = state_; | |
294 | struct command *cmd = state->cmd; | |
295 | ||
cdc2b2f3 JH |
296 | while (cmd && |
297 | state->skip_broken && (cmd->error_string || cmd->did_not_exist)) | |
9684e44a JH |
298 | cmd = cmd->next; |
299 | if (!cmd) | |
300 | return -1; /* EOF */ | |
301 | strbuf_reset(&state->buf); | |
302 | strbuf_addf(&state->buf, "%s %s %s\n", | |
303 | sha1_to_hex(cmd->old_sha1), sha1_to_hex(cmd->new_sha1), | |
304 | cmd->ref_name); | |
305 | state->cmd = cmd->next; | |
306 | if (bufp) { | |
307 | *bufp = state->buf.buf; | |
308 | *sizep = state->buf.len; | |
309 | } | |
310 | return 0; | |
311 | } | |
312 | ||
cdc2b2f3 JH |
313 | static int run_receive_hook(struct command *commands, const char *hook_name, |
314 | int skip_broken) | |
9684e44a JH |
315 | { |
316 | struct receive_hook_feed_state state; | |
317 | int status; | |
318 | ||
319 | strbuf_init(&state.buf, 0); | |
320 | state.cmd = commands; | |
cdc2b2f3 | 321 | state.skip_broken = skip_broken; |
9684e44a JH |
322 | if (feed_receive_hook(&state, NULL, NULL)) |
323 | return 0; | |
324 | state.cmd = commands; | |
325 | status = run_and_feed_hook(hook_name, feed_receive_hook, &state); | |
326 | strbuf_release(&state.buf); | |
327 | return status; | |
328 | } | |
329 | ||
1d9e8b56 SP |
330 | static int run_update_hook(struct command *cmd) |
331 | { | |
332 | static const char update_hook[] = "hooks/update"; | |
1d9e8b56 | 333 | const char *argv[5]; |
6d525d38 SP |
334 | struct child_process proc; |
335 | int code; | |
1d9e8b56 SP |
336 | |
337 | if (access(update_hook, X_OK) < 0) | |
338 | return 0; | |
339 | ||
340 | argv[0] = update_hook; | |
341 | argv[1] = cmd->ref_name; | |
342 | argv[2] = sha1_to_hex(cmd->old_sha1); | |
343 | argv[3] = sha1_to_hex(cmd->new_sha1); | |
344 | argv[4] = NULL; | |
345 | ||
6d525d38 SP |
346 | memset(&proc, 0, sizeof(proc)); |
347 | proc.no_stdin = 1; | |
348 | proc.stdout_to_stderr = 1; | |
349 | proc.err = use_sideband ? -1 : 0; | |
350 | proc.argv = argv; | |
351 | ||
352 | code = start_command(&proc); | |
353 | if (code) | |
354 | return code; | |
355 | if (use_sideband) | |
356 | copy_to_sideband(proc.err, -1, NULL); | |
357 | return finish_command(&proc); | |
1d9e8b56 SP |
358 | } |
359 | ||
986e8239 JK |
360 | static int is_ref_checked_out(const char *ref) |
361 | { | |
986e8239 JK |
362 | if (is_bare_repository()) |
363 | return 0; | |
364 | ||
747ca245 | 365 | if (!head_name) |
986e8239 | 366 | return 0; |
747ca245 | 367 | return !strcmp(head_name, ref); |
986e8239 JK |
368 | } |
369 | ||
acd2a45b JH |
370 | static char *refuse_unconfigured_deny_msg[] = { |
371 | "By default, updating the current branch in a non-bare repository", | |
372 | "is denied, because it will make the index and work tree inconsistent", | |
373 | "with what you pushed, and will require 'git reset --hard' to match", | |
374 | "the work tree to HEAD.", | |
3d95d92b JH |
375 | "", |
376 | "You can set 'receive.denyCurrentBranch' configuration variable to", | |
acd2a45b JH |
377 | "'ignore' or 'warn' in the remote repository to allow pushing into", |
378 | "its current branch; however, this is not recommended unless you", | |
379 | "arranged to update its work tree to match what you pushed in some", | |
380 | "other way.", | |
3d95d92b | 381 | "", |
acd2a45b JH |
382 | "To squelch this message and still keep the default behaviour, set", |
383 | "'receive.denyCurrentBranch' configuration variable to 'refuse'." | |
3d95d92b JH |
384 | }; |
385 | ||
acd2a45b | 386 | static void refuse_unconfigured_deny(void) |
3d95d92b JH |
387 | { |
388 | int i; | |
acd2a45b | 389 | for (i = 0; i < ARRAY_SIZE(refuse_unconfigured_deny_msg); i++) |
a886ba28 | 390 | rp_error("%s", refuse_unconfigured_deny_msg[i]); |
3d95d92b JH |
391 | } |
392 | ||
375881fa JH |
393 | static char *refuse_unconfigured_deny_delete_current_msg[] = { |
394 | "By default, deleting the current branch is denied, because the next", | |
395 | "'git clone' won't result in any file checked out, causing confusion.", | |
747ca245 JH |
396 | "", |
397 | "You can set 'receive.denyDeleteCurrent' configuration variable to", | |
375881fa JH |
398 | "'warn' or 'ignore' in the remote repository to allow deleting the", |
399 | "current branch, with or without a warning message.", | |
747ca245 | 400 | "", |
375881fa | 401 | "To squelch this message, you can set it to 'refuse'." |
747ca245 JH |
402 | }; |
403 | ||
375881fa | 404 | static void refuse_unconfigured_deny_delete_current(void) |
747ca245 JH |
405 | { |
406 | int i; | |
407 | for (i = 0; | |
375881fa | 408 | i < ARRAY_SIZE(refuse_unconfigured_deny_delete_current_msg); |
747ca245 | 409 | i++) |
a886ba28 | 410 | rp_error("%s", refuse_unconfigured_deny_delete_current_msg[i]); |
747ca245 JH |
411 | } |
412 | ||
8aaf7d64 | 413 | static const char *update(struct command *cmd) |
2eca23da | 414 | { |
cfee10a7 | 415 | const char *name = cmd->ref_name; |
6b01ecfe JT |
416 | struct strbuf namespaced_name_buf = STRBUF_INIT; |
417 | const char *namespaced_name; | |
cfee10a7 JH |
418 | unsigned char *old_sha1 = cmd->old_sha1; |
419 | unsigned char *new_sha1 = cmd->new_sha1; | |
3159c8dc | 420 | struct ref_lock *lock; |
2eca23da | 421 | |
061d6b9a | 422 | /* only refs/... are allowed */ |
8d9c5010 | 423 | if (prefixcmp(name, "refs/") || check_refname_format(name + 5, 0)) { |
466dbc42 | 424 | rp_error("refusing to create funny ref '%s' remotely", name); |
8aaf7d64 | 425 | return "funny refname"; |
cfee10a7 | 426 | } |
d8a1deec | 427 | |
6b01ecfe JT |
428 | strbuf_addf(&namespaced_name_buf, "%s%s", get_git_namespace(), name); |
429 | namespaced_name = strbuf_detach(&namespaced_name_buf, NULL); | |
430 | ||
431 | if (is_ref_checked_out(namespaced_name)) { | |
3d95d92b JH |
432 | switch (deny_current_branch) { |
433 | case DENY_IGNORE: | |
986e8239 | 434 | break; |
3d95d92b | 435 | case DENY_WARN: |
466dbc42 | 436 | rp_warning("updating the current branch"); |
986e8239 | 437 | break; |
3d95d92b | 438 | case DENY_REFUSE: |
acd2a45b | 439 | case DENY_UNCONFIGURED: |
466dbc42 | 440 | rp_error("refusing to update checked out branch: %s", name); |
acd2a45b JH |
441 | if (deny_current_branch == DENY_UNCONFIGURED) |
442 | refuse_unconfigured_deny(); | |
3d95d92b JH |
443 | return "branch is currently checked out"; |
444 | } | |
986e8239 JK |
445 | } |
446 | ||
d4f694ba | 447 | if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) { |
8aaf7d64 SP |
448 | error("unpack should have generated %s, " |
449 | "but I can't find it!", sha1_to_hex(new_sha1)); | |
450 | return "bad pack"; | |
cfee10a7 | 451 | } |
747ca245 JH |
452 | |
453 | if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) { | |
454 | if (deny_deletes && !prefixcmp(name, "refs/heads/")) { | |
466dbc42 | 455 | rp_error("denying ref deletion for %s", name); |
747ca245 JH |
456 | return "deletion prohibited"; |
457 | } | |
458 | ||
6b01ecfe | 459 | if (!strcmp(namespaced_name, head_name)) { |
747ca245 JH |
460 | switch (deny_delete_current) { |
461 | case DENY_IGNORE: | |
462 | break; | |
463 | case DENY_WARN: | |
466dbc42 | 464 | rp_warning("deleting the current branch"); |
747ca245 JH |
465 | break; |
466 | case DENY_REFUSE: | |
375881fa JH |
467 | case DENY_UNCONFIGURED: |
468 | if (deny_delete_current == DENY_UNCONFIGURED) | |
469 | refuse_unconfigured_deny_delete_current(); | |
466dbc42 | 470 | rp_error("refusing to delete the current branch: %s", name); |
747ca245 JH |
471 | return "deletion of the current branch prohibited"; |
472 | } | |
473 | } | |
a240de11 | 474 | } |
747ca245 | 475 | |
d4f694ba | 476 | if (deny_non_fast_forwards && !is_null_sha1(new_sha1) && |
ba988a83 | 477 | !is_null_sha1(old_sha1) && |
cc44c765 | 478 | !prefixcmp(name, "refs/heads/")) { |
eab82707 | 479 | struct object *old_object, *new_object; |
11031d7e | 480 | struct commit *old_commit, *new_commit; |
9edd7e46 | 481 | struct commit_list *bases, *ent; |
11031d7e | 482 | |
eab82707 MK |
483 | old_object = parse_object(old_sha1); |
484 | new_object = parse_object(new_sha1); | |
485 | ||
486 | if (!old_object || !new_object || | |
487 | old_object->type != OBJ_COMMIT || | |
488 | new_object->type != OBJ_COMMIT) { | |
489 | error("bad sha1 objects for %s", name); | |
490 | return "bad ref"; | |
491 | } | |
492 | old_commit = (struct commit *)old_object; | |
493 | new_commit = (struct commit *)new_object; | |
9edd7e46 JS |
494 | bases = get_merge_bases(old_commit, new_commit, 1); |
495 | for (ent = bases; ent; ent = ent->next) | |
496 | if (!hashcmp(old_sha1, ent->item->object.sha1)) | |
11031d7e | 497 | break; |
9edd7e46 | 498 | free_commit_list(bases); |
8aaf7d64 | 499 | if (!ent) { |
466dbc42 SP |
500 | rp_error("denying non-fast-forward %s" |
501 | " (you should pull first)", name); | |
a75d7b54 | 502 | return "non-fast-forward"; |
8aaf7d64 | 503 | } |
11031d7e | 504 | } |
1d9e8b56 | 505 | if (run_update_hook(cmd)) { |
466dbc42 | 506 | rp_error("hook declined to update %s", name); |
8aaf7d64 | 507 | return "hook declined"; |
b1bf95bb | 508 | } |
3159c8dc | 509 | |
d4f694ba | 510 | if (is_null_sha1(new_sha1)) { |
28391a80 | 511 | if (!parse_object(old_sha1)) { |
28391a80 | 512 | old_sha1 = NULL; |
160b81ed PYH |
513 | if (ref_exists(name)) { |
514 | rp_warning("Allowing deletion of corrupt ref."); | |
515 | } else { | |
516 | rp_warning("Deleting a non-existent ref."); | |
517 | cmd->did_not_exist = 1; | |
518 | } | |
28391a80 | 519 | } |
6b01ecfe | 520 | if (delete_ref(namespaced_name, old_sha1, 0)) { |
466dbc42 | 521 | rp_error("failed to delete %s", name); |
8aaf7d64 | 522 | return "failed to delete"; |
d4f694ba | 523 | } |
8aaf7d64 | 524 | return NULL; /* good */ |
d4f694ba JH |
525 | } |
526 | else { | |
6b01ecfe | 527 | lock = lock_any_ref_for_update(namespaced_name, old_sha1, 0); |
d4f694ba | 528 | if (!lock) { |
466dbc42 | 529 | rp_error("failed to lock %s", name); |
8aaf7d64 | 530 | return "failed to lock"; |
d4f694ba | 531 | } |
ef203f08 | 532 | if (write_ref_sha1(lock, new_sha1, "push")) { |
8aaf7d64 | 533 | return "failed to write"; /* error() already called */ |
ef203f08 | 534 | } |
8aaf7d64 | 535 | return NULL; /* good */ |
19614330 | 536 | } |
2eca23da LT |
537 | } |
538 | ||
19614330 JH |
539 | static char update_post_hook[] = "hooks/post-update"; |
540 | ||
5e1c71fd | 541 | static void run_update_post_hook(struct command *commands) |
19614330 | 542 | { |
5e1c71fd | 543 | struct command *cmd; |
6d525d38 | 544 | int argc; |
9201c707 | 545 | const char **argv; |
6d525d38 | 546 | struct child_process proc; |
19614330 | 547 | |
5e1c71fd | 548 | for (argc = 0, cmd = commands; cmd; cmd = cmd->next) { |
160b81ed | 549 | if (cmd->error_string || cmd->did_not_exist) |
19614330 JH |
550 | continue; |
551 | argc++; | |
552 | } | |
3e6e152c SP |
553 | if (!argc || access(update_post_hook, X_OK) < 0) |
554 | return; | |
555 | argv = xmalloc(sizeof(*argv) * (2 + argc)); | |
19614330 JH |
556 | argv[0] = update_post_hook; |
557 | ||
5e1c71fd | 558 | for (argc = 1, cmd = commands; cmd; cmd = cmd->next) { |
9201c707 | 559 | char *p; |
160b81ed | 560 | if (cmd->error_string || cmd->did_not_exist) |
19614330 | 561 | continue; |
5e1c71fd JS |
562 | p = xmalloc(strlen(cmd->ref_name) + 1); |
563 | strcpy(p, cmd->ref_name); | |
9201c707 | 564 | argv[argc] = p; |
19614330 JH |
565 | argc++; |
566 | } | |
567 | argv[argc] = NULL; | |
6d525d38 SP |
568 | |
569 | memset(&proc, 0, sizeof(proc)); | |
570 | proc.no_stdin = 1; | |
571 | proc.stdout_to_stderr = 1; | |
572 | proc.err = use_sideband ? -1 : 0; | |
573 | proc.argv = argv; | |
574 | ||
575 | if (!start_command(&proc)) { | |
576 | if (use_sideband) | |
577 | copy_to_sideband(proc.err, -1, NULL); | |
578 | finish_command(&proc); | |
579 | } | |
19614330 | 580 | } |
2eca23da | 581 | |
da3efdb1 JS |
582 | static void check_aliased_update(struct command *cmd, struct string_list *list) |
583 | { | |
6b01ecfe JT |
584 | struct strbuf buf = STRBUF_INIT; |
585 | const char *dst_name; | |
da3efdb1 JS |
586 | struct string_list_item *item; |
587 | struct command *dst_cmd; | |
588 | unsigned char sha1[20]; | |
589 | char cmd_oldh[41], cmd_newh[41], dst_oldh[41], dst_newh[41]; | |
590 | int flag; | |
591 | ||
6b01ecfe | 592 | strbuf_addf(&buf, "%s%s", get_git_namespace(), cmd->ref_name); |
8cad4744 | 593 | dst_name = resolve_ref_unsafe(buf.buf, sha1, 0, &flag); |
6b01ecfe | 594 | strbuf_release(&buf); |
da3efdb1 JS |
595 | |
596 | if (!(flag & REF_ISSYMREF)) | |
597 | return; | |
598 | ||
6b01ecfe JT |
599 | dst_name = strip_namespace(dst_name); |
600 | if (!dst_name) { | |
601 | rp_error("refusing update to broken symref '%s'", cmd->ref_name); | |
602 | cmd->skip_update = 1; | |
603 | cmd->error_string = "broken symref"; | |
604 | return; | |
605 | } | |
606 | ||
e8c8b713 | 607 | if ((item = string_list_lookup(list, dst_name)) == NULL) |
da3efdb1 JS |
608 | return; |
609 | ||
610 | cmd->skip_update = 1; | |
611 | ||
612 | dst_cmd = (struct command *) item->util; | |
613 | ||
614 | if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) && | |
615 | !hashcmp(cmd->new_sha1, dst_cmd->new_sha1)) | |
616 | return; | |
617 | ||
618 | dst_cmd->skip_update = 1; | |
619 | ||
620 | strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV)); | |
0e71bc30 | 621 | strcpy(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 | 622 | strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV)); |
0e71bc30 | 623 | strcpy(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 JS |
624 | rp_error("refusing inconsistent update between symref '%s' (%s..%s) and" |
625 | " its target '%s' (%s..%s)", | |
626 | cmd->ref_name, cmd_oldh, cmd_newh, | |
627 | dst_cmd->ref_name, dst_oldh, dst_newh); | |
628 | ||
629 | cmd->error_string = dst_cmd->error_string = | |
630 | "inconsistent aliased update"; | |
631 | } | |
632 | ||
633 | static void check_aliased_updates(struct command *commands) | |
634 | { | |
635 | struct command *cmd; | |
183113a5 | 636 | struct string_list ref_list = STRING_LIST_INIT_NODUP; |
da3efdb1 JS |
637 | |
638 | for (cmd = commands; cmd; cmd = cmd->next) { | |
639 | struct string_list_item *item = | |
1d2f80fa | 640 | string_list_append(&ref_list, cmd->ref_name); |
da3efdb1 JS |
641 | item->util = (void *)cmd; |
642 | } | |
643 | sort_string_list(&ref_list); | |
644 | ||
ef7e93d9 CB |
645 | for (cmd = commands; cmd; cmd = cmd->next) { |
646 | if (!cmd->error_string) | |
647 | check_aliased_update(cmd, &ref_list); | |
648 | } | |
da3efdb1 JS |
649 | |
650 | string_list_clear(&ref_list, 0); | |
651 | } | |
652 | ||
52fed6e1 JH |
653 | static int command_singleton_iterator(void *cb_data, unsigned char sha1[20]) |
654 | { | |
655 | struct command **cmd_list = cb_data; | |
656 | struct command *cmd = *cmd_list; | |
657 | ||
ee6dfb2d | 658 | if (!cmd || is_null_sha1(cmd->new_sha1)) |
52fed6e1 JH |
659 | return -1; /* end of list */ |
660 | *cmd_list = NULL; /* this returns only one */ | |
661 | hashcpy(sha1, cmd->new_sha1); | |
662 | return 0; | |
663 | } | |
664 | ||
665 | static void set_connectivity_errors(struct command *commands) | |
666 | { | |
667 | struct command *cmd; | |
668 | ||
669 | for (cmd = commands; cmd; cmd = cmd->next) { | |
670 | struct command *singleton = cmd; | |
671 | if (!check_everything_connected(command_singleton_iterator, | |
672 | 0, &singleton)) | |
673 | continue; | |
674 | cmd->error_string = "missing necessary objects"; | |
675 | } | |
676 | } | |
677 | ||
678 | static int iterate_receive_command_list(void *cb_data, unsigned char sha1[20]) | |
679 | { | |
680 | struct command **cmd_list = cb_data; | |
681 | struct command *cmd = *cmd_list; | |
682 | ||
ee6dfb2d JH |
683 | while (cmd) { |
684 | if (!is_null_sha1(cmd->new_sha1)) { | |
685 | hashcpy(sha1, cmd->new_sha1); | |
686 | *cmd_list = cmd->next; | |
687 | return 0; | |
688 | } | |
689 | cmd = cmd->next; | |
690 | } | |
691 | *cmd_list = NULL; | |
692 | return -1; /* end of list */ | |
52fed6e1 JH |
693 | } |
694 | ||
5e1c71fd | 695 | static void execute_commands(struct command *commands, const char *unpacker_error) |
575f4974 | 696 | { |
5e1c71fd | 697 | struct command *cmd; |
747ca245 | 698 | unsigned char sha1[20]; |
8aaf7d64 SP |
699 | |
700 | if (unpacker_error) { | |
5e1c71fd | 701 | for (cmd = commands; cmd; cmd = cmd->next) |
8aaf7d64 | 702 | cmd->error_string = "n/a (unpacker error)"; |
8aaf7d64 SP |
703 | return; |
704 | } | |
705 | ||
52fed6e1 JH |
706 | cmd = commands; |
707 | if (check_everything_connected(iterate_receive_command_list, | |
708 | 0, &cmd)) | |
709 | set_connectivity_errors(commands); | |
710 | ||
cdc2b2f3 | 711 | if (run_receive_hook(commands, pre_receive_hook, 0)) { |
ef7e93d9 CB |
712 | for (cmd = commands; cmd; cmd = cmd->next) { |
713 | if (!cmd->error_string) | |
714 | cmd->error_string = "pre-receive hook declined"; | |
715 | } | |
05ef58ec SP |
716 | return; |
717 | } | |
718 | ||
da3efdb1 JS |
719 | check_aliased_updates(commands); |
720 | ||
96ec7b1e NTND |
721 | free(head_name_to_free); |
722 | head_name = head_name_to_free = resolve_refdup("HEAD", sha1, 0, NULL); | |
747ca245 | 723 | |
ef7e93d9 CB |
724 | for (cmd = commands; cmd; cmd = cmd->next) { |
725 | if (cmd->error_string) | |
726 | continue; | |
727 | ||
728 | if (cmd->skip_update) | |
729 | continue; | |
730 | ||
731 | cmd->error_string = update(cmd); | |
732 | } | |
575f4974 LT |
733 | } |
734 | ||
5e1c71fd | 735 | static struct command *read_head_info(void) |
575f4974 | 736 | { |
5e1c71fd | 737 | struct command *commands = NULL; |
eb1af2df | 738 | struct command **p = &commands; |
575f4974 LT |
739 | for (;;) { |
740 | static char line[1000]; | |
eb1af2df LT |
741 | unsigned char old_sha1[20], new_sha1[20]; |
742 | struct command *cmd; | |
cfee10a7 JH |
743 | char *refname; |
744 | int len, reflen; | |
eb1af2df LT |
745 | |
746 | len = packet_read_line(0, line, sizeof(line)); | |
575f4974 LT |
747 | if (!len) |
748 | break; | |
eb1af2df LT |
749 | if (line[len-1] == '\n') |
750 | line[--len] = 0; | |
751 | if (len < 83 || | |
752 | line[40] != ' ' || | |
753 | line[81] != ' ' || | |
754 | get_sha1_hex(line, old_sha1) || | |
755 | get_sha1_hex(line + 41, new_sha1)) | |
cfee10a7 JH |
756 | die("protocol error: expected old/new/ref, got '%s'", |
757 | line); | |
758 | ||
759 | refname = line + 82; | |
760 | reflen = strlen(refname); | |
761 | if (reflen + 82 < len) { | |
f47182c8 JH |
762 | const char *feature_list = refname + reflen + 1; |
763 | if (parse_feature_request(feature_list, "report-status")) | |
cfee10a7 | 764 | report_status = 1; |
f47182c8 | 765 | if (parse_feature_request(feature_list, "side-band-64k")) |
38a81b4e | 766 | use_sideband = LARGE_PACKET_MAX; |
c207e34f CB |
767 | if (parse_feature_request(feature_list, "quiet")) |
768 | quiet = 1; | |
cfee10a7 | 769 | } |
da3efdb1 | 770 | cmd = xcalloc(1, sizeof(struct command) + len - 80); |
e702496e SP |
771 | hashcpy(cmd->old_sha1, old_sha1); |
772 | hashcpy(cmd->new_sha1, new_sha1); | |
eb1af2df | 773 | memcpy(cmd->ref_name, line + 82, len - 81); |
eb1af2df LT |
774 | *p = cmd; |
775 | p = &cmd->next; | |
575f4974 | 776 | } |
5e1c71fd | 777 | return commands; |
575f4974 LT |
778 | } |
779 | ||
fc04c412 SP |
780 | static const char *parse_pack_header(struct pack_header *hdr) |
781 | { | |
a69e5429 JH |
782 | switch (read_pack_header(0, hdr)) { |
783 | case PH_ERROR_EOF: | |
784 | return "eof before pack header was fully read"; | |
785 | ||
786 | case PH_ERROR_PACK_SIGNATURE: | |
fc04c412 | 787 | return "protocol error (pack signature mismatch detected)"; |
a69e5429 JH |
788 | |
789 | case PH_ERROR_PROTOCOL: | |
fc04c412 | 790 | return "protocol error (pack version unsupported)"; |
a69e5429 JH |
791 | |
792 | default: | |
793 | return "unknown error in parse_pack_header"; | |
794 | ||
795 | case 0: | |
796 | return NULL; | |
797 | } | |
fc04c412 SP |
798 | } |
799 | ||
576162a4 NP |
800 | static const char *pack_lockfile; |
801 | ||
5a277f3f | 802 | static const char *unpack(void) |
575f4974 | 803 | { |
fc04c412 SP |
804 | struct pack_header hdr; |
805 | const char *hdr_err; | |
806 | char hdr_arg[38]; | |
dab76d3a JH |
807 | int fsck_objects = (receive_fsck_objects >= 0 |
808 | ? receive_fsck_objects | |
809 | : transfer_fsck_objects >= 0 | |
810 | ? transfer_fsck_objects | |
811 | : 0); | |
fc04c412 SP |
812 | |
813 | hdr_err = parse_pack_header(&hdr); | |
814 | if (hdr_err) | |
815 | return hdr_err; | |
6e1c2344 RJ |
816 | snprintf(hdr_arg, sizeof(hdr_arg), |
817 | "--pack_header=%"PRIu32",%"PRIu32, | |
fc04c412 SP |
818 | ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries)); |
819 | ||
820 | if (ntohl(hdr.hdr_entries) < unpack_limit) { | |
20dc0016 | 821 | int code, i = 0; |
c207e34f | 822 | const char *unpacker[5]; |
20dc0016 | 823 | unpacker[i++] = "unpack-objects"; |
c207e34f CB |
824 | if (quiet) |
825 | unpacker[i++] = "-q"; | |
dab76d3a | 826 | if (fsck_objects) |
20dc0016 MK |
827 | unpacker[i++] = "--strict"; |
828 | unpacker[i++] = hdr_arg; | |
829 | unpacker[i++] = NULL; | |
9b0b5093 | 830 | code = run_command_v_opt(unpacker, RUN_GIT_CMD); |
2ff4d1ab | 831 | if (!code) |
fc04c412 | 832 | return NULL; |
2ff4d1ab | 833 | return "unpack-objects abnormal exit"; |
576162a4 | 834 | } else { |
20dc0016 MK |
835 | const char *keeper[7]; |
836 | int s, status, i = 0; | |
576162a4 | 837 | char keep_arg[256]; |
e8016abf | 838 | struct child_process ip; |
576162a4 | 839 | |
85e72830 | 840 | s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid()); |
576162a4 NP |
841 | if (gethostname(keep_arg + s, sizeof(keep_arg) - s)) |
842 | strcpy(keep_arg + s, "localhost"); | |
843 | ||
20dc0016 MK |
844 | keeper[i++] = "index-pack"; |
845 | keeper[i++] = "--stdin"; | |
dab76d3a | 846 | if (fsck_objects) |
20dc0016 MK |
847 | keeper[i++] = "--strict"; |
848 | keeper[i++] = "--fix-thin"; | |
849 | keeper[i++] = hdr_arg; | |
850 | keeper[i++] = keep_arg; | |
851 | keeper[i++] = NULL; | |
e8016abf SP |
852 | memset(&ip, 0, sizeof(ip)); |
853 | ip.argv = keeper; | |
854 | ip.out = -1; | |
855 | ip.git_cmd = 1; | |
2ff4d1ab JS |
856 | status = start_command(&ip); |
857 | if (status) { | |
576162a4 | 858 | return "index-pack fork failed"; |
2ff4d1ab | 859 | } |
106764e6 | 860 | pack_lockfile = index_pack_lockfile(ip.out); |
e72ae288 | 861 | close(ip.out); |
e8016abf SP |
862 | status = finish_command(&ip); |
863 | if (!status) { | |
576162a4 NP |
864 | reprepare_packed_git(); |
865 | return NULL; | |
866 | } | |
867 | return "index-pack abnormal exit"; | |
cfee10a7 JH |
868 | } |
869 | } | |
870 | ||
5e1c71fd | 871 | static void report(struct command *commands, const char *unpack_status) |
cfee10a7 JH |
872 | { |
873 | struct command *cmd; | |
38a81b4e SP |
874 | struct strbuf buf = STRBUF_INIT; |
875 | ||
876 | packet_buf_write(&buf, "unpack %s\n", | |
877 | unpack_status ? unpack_status : "ok"); | |
cfee10a7 JH |
878 | for (cmd = commands; cmd; cmd = cmd->next) { |
879 | if (!cmd->error_string) | |
38a81b4e SP |
880 | packet_buf_write(&buf, "ok %s\n", |
881 | cmd->ref_name); | |
cfee10a7 | 882 | else |
38a81b4e SP |
883 | packet_buf_write(&buf, "ng %s %s\n", |
884 | cmd->ref_name, cmd->error_string); | |
575f4974 | 885 | } |
38a81b4e SP |
886 | packet_buf_flush(&buf); |
887 | ||
888 | if (use_sideband) | |
889 | send_sideband(1, 1, buf.buf, buf.len, use_sideband); | |
890 | else | |
891 | safe_write(1, buf.buf, buf.len); | |
892 | strbuf_release(&buf); | |
575f4974 LT |
893 | } |
894 | ||
5e1c71fd | 895 | static int delete_only(struct command *commands) |
d4f694ba | 896 | { |
5e1c71fd JS |
897 | struct command *cmd; |
898 | for (cmd = commands; cmd; cmd = cmd->next) { | |
d4f694ba JH |
899 | if (!is_null_sha1(cmd->new_sha1)) |
900 | return 0; | |
d4f694ba JH |
901 | } |
902 | return 1; | |
903 | } | |
904 | ||
be5908ae | 905 | int cmd_receive_pack(int argc, const char **argv, const char *prefix) |
575f4974 | 906 | { |
42526b47 SP |
907 | int advertise_refs = 0; |
908 | int stateless_rpc = 0; | |
d0efc8a7 | 909 | int i; |
8d630132 | 910 | char *dir = NULL; |
5e1c71fd | 911 | struct command *commands; |
575f4974 | 912 | |
bbc30f99 JK |
913 | packet_trace_identity("receive-pack"); |
914 | ||
575f4974 LT |
915 | argv++; |
916 | for (i = 1; i < argc; i++) { | |
be5908ae | 917 | const char *arg = *argv++; |
575f4974 LT |
918 | |
919 | if (*arg == '-') { | |
c207e34f CB |
920 | if (!strcmp(arg, "--quiet")) { |
921 | quiet = 1; | |
922 | continue; | |
923 | } | |
924 | ||
42526b47 SP |
925 | if (!strcmp(arg, "--advertise-refs")) { |
926 | advertise_refs = 1; | |
927 | continue; | |
928 | } | |
929 | if (!strcmp(arg, "--stateless-rpc")) { | |
930 | stateless_rpc = 1; | |
931 | continue; | |
932 | } | |
933 | ||
575f4974 LT |
934 | usage(receive_pack_usage); |
935 | } | |
d0efc8a7 LT |
936 | if (dir) |
937 | usage(receive_pack_usage); | |
be5908ae | 938 | dir = xstrdup(arg); |
575f4974 LT |
939 | } |
940 | if (!dir) | |
941 | usage(receive_pack_usage); | |
942 | ||
e1464ca7 | 943 | setup_path(); |
5c09f321 | 944 | |
3159c8dc | 945 | if (!enter_repo(dir, 0)) |
05ac6b34 | 946 | die("'%s' does not appear to be a git repository", dir); |
575f4974 | 947 | |
a0022eeb JH |
948 | if (is_repository_shallow()) |
949 | die("attempt to push into a shallow repository"); | |
950 | ||
ef90d6d4 | 951 | git_config(receive_pack_config, NULL); |
6fb75bed | 952 | |
e28714c5 JH |
953 | if (0 <= transfer_unpack_limit) |
954 | unpack_limit = transfer_unpack_limit; | |
955 | else if (0 <= receive_unpack_limit) | |
956 | unpack_limit = receive_unpack_limit; | |
957 | ||
42526b47 | 958 | if (advertise_refs || !stateless_rpc) { |
42526b47 | 959 | write_head_info(); |
42526b47 SP |
960 | } |
961 | if (advertise_refs) | |
962 | return 0; | |
575f4974 | 963 | |
5e1c71fd | 964 | if ((commands = read_head_info()) != NULL) { |
d4f694ba JH |
965 | const char *unpack_status = NULL; |
966 | ||
967 | if (!delete_only(commands)) | |
5a277f3f | 968 | unpack_status = unpack(); |
5e1c71fd | 969 | execute_commands(commands, unpack_status); |
576162a4 | 970 | if (pack_lockfile) |
691f1a28 | 971 | unlink_or_warn(pack_lockfile); |
cfee10a7 | 972 | if (report_status) |
5e1c71fd | 973 | report(commands, unpack_status); |
cdc2b2f3 | 974 | run_receive_hook(commands, post_receive_hook, 1); |
8e663d9e | 975 | run_update_post_hook(commands); |
77e3efbf JH |
976 | if (auto_gc) { |
977 | const char *argv_gc_auto[] = { | |
978 | "gc", "--auto", "--quiet", NULL, | |
979 | }; | |
980 | run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); | |
981 | } | |
982 | if (auto_update_server_info) | |
983 | update_server_info(0); | |
7f8e9828 | 984 | } |
38a81b4e SP |
985 | if (use_sideband) |
986 | packet_flush(1); | |
575f4974 LT |
987 | return 0; |
988 | } |