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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" |
575f4974 | 14 | |
34263de0 | 15 | static const char receive_pack_usage[] = "git receive-pack <git-dir>"; |
575f4974 | 16 | |
986e8239 | 17 | enum deny_action { |
3d95d92b | 18 | DENY_UNCONFIGURED, |
986e8239 JK |
19 | DENY_IGNORE, |
20 | DENY_WARN, | |
4b05548f | 21 | DENY_REFUSE |
986e8239 JK |
22 | }; |
23 | ||
1b53a076 JH |
24 | static int deny_deletes; |
25 | static int deny_non_fast_forwards; | |
3d95d92b | 26 | static enum deny_action deny_current_branch = DENY_UNCONFIGURED; |
747ca245 | 27 | static enum deny_action deny_delete_current = DENY_UNCONFIGURED; |
20dc0016 | 28 | static int receive_fsck_objects; |
e28714c5 JH |
29 | static int receive_unpack_limit = -1; |
30 | static int transfer_unpack_limit = -1; | |
46732fae | 31 | static int unpack_limit = 100; |
96f1e58f | 32 | static int report_status; |
38a81b4e | 33 | static int use_sideband; |
b74fce16 | 34 | static int prefer_ofs_delta = 1; |
77e3efbf JH |
35 | static int auto_update_server_info; |
36 | static int auto_gc = 1; | |
747ca245 | 37 | static const char *head_name; |
185c04e0 | 38 | static int sent_capabilities; |
cfee10a7 | 39 | |
986e8239 JK |
40 | static enum deny_action parse_deny_action(const char *var, const char *value) |
41 | { | |
42 | if (value) { | |
43 | if (!strcasecmp(value, "ignore")) | |
44 | return DENY_IGNORE; | |
45 | if (!strcasecmp(value, "warn")) | |
46 | return DENY_WARN; | |
47 | if (!strcasecmp(value, "refuse")) | |
48 | return DENY_REFUSE; | |
49 | } | |
50 | if (git_config_bool(var, value)) | |
51 | return DENY_REFUSE; | |
52 | return DENY_IGNORE; | |
53 | } | |
54 | ||
ef90d6d4 | 55 | static int receive_pack_config(const char *var, const char *value, void *cb) |
6fb75bed | 56 | { |
a240de11 JK |
57 | if (strcmp(var, "receive.denydeletes") == 0) { |
58 | deny_deletes = git_config_bool(var, value); | |
59 | return 0; | |
60 | } | |
61 | ||
e28714c5 | 62 | if (strcmp(var, "receive.denynonfastforwards") == 0) { |
6fb75bed SP |
63 | deny_non_fast_forwards = git_config_bool(var, value); |
64 | return 0; | |
65 | } | |
66 | ||
e28714c5 JH |
67 | if (strcmp(var, "receive.unpacklimit") == 0) { |
68 | receive_unpack_limit = git_config_int(var, value); | |
fc04c412 SP |
69 | return 0; |
70 | } | |
71 | ||
e28714c5 JH |
72 | if (strcmp(var, "transfer.unpacklimit") == 0) { |
73 | transfer_unpack_limit = git_config_int(var, value); | |
74 | return 0; | |
75 | } | |
76 | ||
20dc0016 MK |
77 | if (strcmp(var, "receive.fsckobjects") == 0) { |
78 | receive_fsck_objects = git_config_bool(var, value); | |
79 | return 0; | |
80 | } | |
81 | ||
986e8239 JK |
82 | if (!strcmp(var, "receive.denycurrentbranch")) { |
83 | deny_current_branch = parse_deny_action(var, value); | |
84 | return 0; | |
85 | } | |
86 | ||
747ca245 JH |
87 | if (strcmp(var, "receive.denydeletecurrent") == 0) { |
88 | deny_delete_current = parse_deny_action(var, value); | |
89 | return 0; | |
90 | } | |
91 | ||
b74fce16 NP |
92 | if (strcmp(var, "repack.usedeltabaseoffset") == 0) { |
93 | prefer_ofs_delta = git_config_bool(var, value); | |
94 | return 0; | |
95 | } | |
96 | ||
77e3efbf JH |
97 | if (strcmp(var, "receive.updateserverinfo") == 0) { |
98 | auto_update_server_info = git_config_bool(var, value); | |
99 | return 0; | |
100 | } | |
101 | ||
102 | if (strcmp(var, "receive.autogc") == 0) { | |
103 | auto_gc = git_config_bool(var, value); | |
104 | return 0; | |
105 | } | |
106 | ||
ef90d6d4 | 107 | return git_default_config(var, value, cb); |
6fb75bed SP |
108 | } |
109 | ||
8da19775 | 110 | static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data) |
575f4974 | 111 | { |
185c04e0 | 112 | if (sent_capabilities) |
cfee10a7 JH |
113 | packet_write(1, "%s %s\n", sha1_to_hex(sha1), path); |
114 | else | |
185c04e0 SP |
115 | packet_write(1, "%s %s%c%s%s\n", |
116 | sha1_to_hex(sha1), path, 0, | |
38a81b4e | 117 | " report-status delete-refs side-band-64k", |
185c04e0 SP |
118 | prefer_ofs_delta ? " ofs-delta" : ""); |
119 | sent_capabilities = 1; | |
8a65ff76 | 120 | return 0; |
575f4974 LT |
121 | } |
122 | ||
6b01ecfe JT |
123 | static int show_ref_cb(const char *path, const unsigned char *sha1, int flag, void *cb_data) |
124 | { | |
125 | path = strip_namespace(path); | |
126 | /* | |
127 | * Advertise refs outside our current namespace as ".have" | |
128 | * refs, so that the client can use them to minimize data | |
129 | * transfer but will otherwise ignore them. This happens to | |
130 | * cover ".have" that are thrown in by add_one_alternate_ref() | |
131 | * to mark histories that are complete in our alternates as | |
132 | * well. | |
133 | */ | |
134 | if (!path) | |
135 | path = ".have"; | |
136 | return show_ref(path, sha1, flag, cb_data); | |
137 | } | |
138 | ||
8a65ff76 | 139 | static void write_head_info(void) |
575f4974 | 140 | { |
6b01ecfe | 141 | for_each_ref(show_ref_cb, NULL); |
185c04e0 | 142 | if (!sent_capabilities) |
8da19775 | 143 | show_ref("capabilities^{}", null_sha1, 0, NULL); |
cfee10a7 | 144 | |
575f4974 LT |
145 | } |
146 | ||
eb1af2df LT |
147 | struct command { |
148 | struct command *next; | |
cfee10a7 | 149 | const char *error_string; |
da3efdb1 | 150 | unsigned int skip_update; |
eb1af2df LT |
151 | unsigned char old_sha1[20]; |
152 | unsigned char new_sha1[20]; | |
8f1d2e6f | 153 | char ref_name[FLEX_ARRAY]; /* more */ |
575f4974 LT |
154 | }; |
155 | ||
05ef58ec SP |
156 | static const char pre_receive_hook[] = "hooks/pre-receive"; |
157 | static const char post_receive_hook[] = "hooks/post-receive"; | |
b1bf95bb | 158 | |
466dbc42 SP |
159 | static void rp_error(const char *err, ...) __attribute__((format (printf, 1, 2))); |
160 | static void rp_warning(const char *err, ...) __attribute__((format (printf, 1, 2))); | |
161 | ||
162 | static void report_message(const char *prefix, const char *err, va_list params) | |
163 | { | |
164 | int sz = strlen(prefix); | |
165 | char msg[4096]; | |
166 | ||
167 | strncpy(msg, prefix, sz); | |
168 | sz += vsnprintf(msg + sz, sizeof(msg) - sz, err, params); | |
169 | if (sz > (sizeof(msg) - 1)) | |
170 | sz = sizeof(msg) - 1; | |
171 | msg[sz++] = '\n'; | |
172 | ||
173 | if (use_sideband) | |
174 | send_sideband(1, 2, msg, sz, use_sideband); | |
175 | else | |
176 | xwrite(2, msg, sz); | |
177 | } | |
178 | ||
179 | static void rp_warning(const char *err, ...) | |
180 | { | |
181 | va_list params; | |
182 | va_start(params, err); | |
183 | report_message("warning: ", err, params); | |
184 | va_end(params); | |
185 | } | |
186 | ||
187 | static void rp_error(const char *err, ...) | |
188 | { | |
189 | va_list params; | |
190 | va_start(params, err); | |
191 | report_message("error: ", err, params); | |
192 | va_end(params); | |
193 | } | |
194 | ||
6d525d38 SP |
195 | static int copy_to_sideband(int in, int out, void *arg) |
196 | { | |
197 | char data[128]; | |
198 | while (1) { | |
199 | ssize_t sz = xread(in, data, sizeof(data)); | |
200 | if (sz <= 0) | |
201 | break; | |
202 | send_sideband(1, 2, data, sz, use_sideband); | |
203 | } | |
204 | close(in); | |
205 | return 0; | |
206 | } | |
207 | ||
5e1c71fd | 208 | static int run_receive_hook(struct command *commands, const char *hook_name) |
b1bf95bb | 209 | { |
f43cd49f | 210 | static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4]; |
c8dd2771 | 211 | struct command *cmd; |
f43cd49f | 212 | struct child_process proc; |
6d525d38 | 213 | struct async muxer; |
f43cd49f SP |
214 | const char *argv[2]; |
215 | int have_input = 0, code; | |
c8dd2771 | 216 | |
f43cd49f | 217 | for (cmd = commands; !have_input && cmd; cmd = cmd->next) { |
c8dd2771 | 218 | if (!cmd->error_string) |
f43cd49f | 219 | have_input = 1; |
c8dd2771 | 220 | } |
b1bf95bb | 221 | |
f43cd49f | 222 | if (!have_input || access(hook_name, X_OK) < 0) |
b1bf95bb | 223 | return 0; |
c8dd2771 | 224 | |
c8dd2771 | 225 | argv[0] = hook_name; |
f43cd49f SP |
226 | argv[1] = NULL; |
227 | ||
228 | memset(&proc, 0, sizeof(proc)); | |
229 | proc.argv = argv; | |
230 | proc.in = -1; | |
231 | proc.stdout_to_stderr = 1; | |
232 | ||
6d525d38 SP |
233 | if (use_sideband) { |
234 | memset(&muxer, 0, sizeof(muxer)); | |
235 | muxer.proc = copy_to_sideband; | |
236 | muxer.in = -1; | |
237 | code = start_async(&muxer); | |
238 | if (code) | |
239 | return code; | |
240 | proc.err = muxer.in; | |
241 | } | |
242 | ||
f43cd49f | 243 | code = start_command(&proc); |
6d525d38 SP |
244 | if (code) { |
245 | if (use_sideband) | |
246 | finish_async(&muxer); | |
90e41a89 | 247 | return code; |
6d525d38 SP |
248 | } |
249 | ||
f43cd49f | 250 | for (cmd = commands; cmd; cmd = cmd->next) { |
c8dd2771 | 251 | if (!cmd->error_string) { |
f43cd49f SP |
252 | size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n", |
253 | sha1_to_hex(cmd->old_sha1), | |
254 | sha1_to_hex(cmd->new_sha1), | |
255 | cmd->ref_name); | |
256 | if (write_in_full(proc.in, buf, n) != n) | |
257 | break; | |
c8dd2771 | 258 | } |
c8dd2771 | 259 | } |
e72ae288 | 260 | close(proc.in); |
6d525d38 SP |
261 | if (use_sideband) |
262 | finish_async(&muxer); | |
90e41a89 | 263 | return finish_command(&proc); |
b1bf95bb JW |
264 | } |
265 | ||
1d9e8b56 SP |
266 | static int run_update_hook(struct command *cmd) |
267 | { | |
268 | static const char update_hook[] = "hooks/update"; | |
1d9e8b56 | 269 | const char *argv[5]; |
6d525d38 SP |
270 | struct child_process proc; |
271 | int code; | |
1d9e8b56 SP |
272 | |
273 | if (access(update_hook, X_OK) < 0) | |
274 | return 0; | |
275 | ||
276 | argv[0] = update_hook; | |
277 | argv[1] = cmd->ref_name; | |
278 | argv[2] = sha1_to_hex(cmd->old_sha1); | |
279 | argv[3] = sha1_to_hex(cmd->new_sha1); | |
280 | argv[4] = NULL; | |
281 | ||
6d525d38 SP |
282 | memset(&proc, 0, sizeof(proc)); |
283 | proc.no_stdin = 1; | |
284 | proc.stdout_to_stderr = 1; | |
285 | proc.err = use_sideband ? -1 : 0; | |
286 | proc.argv = argv; | |
287 | ||
288 | code = start_command(&proc); | |
289 | if (code) | |
290 | return code; | |
291 | if (use_sideband) | |
292 | copy_to_sideband(proc.err, -1, NULL); | |
293 | return finish_command(&proc); | |
1d9e8b56 SP |
294 | } |
295 | ||
986e8239 JK |
296 | static int is_ref_checked_out(const char *ref) |
297 | { | |
986e8239 JK |
298 | if (is_bare_repository()) |
299 | return 0; | |
300 | ||
747ca245 | 301 | if (!head_name) |
986e8239 | 302 | return 0; |
747ca245 | 303 | return !strcmp(head_name, ref); |
986e8239 JK |
304 | } |
305 | ||
acd2a45b JH |
306 | static char *refuse_unconfigured_deny_msg[] = { |
307 | "By default, updating the current branch in a non-bare repository", | |
308 | "is denied, because it will make the index and work tree inconsistent", | |
309 | "with what you pushed, and will require 'git reset --hard' to match", | |
310 | "the work tree to HEAD.", | |
3d95d92b JH |
311 | "", |
312 | "You can set 'receive.denyCurrentBranch' configuration variable to", | |
acd2a45b JH |
313 | "'ignore' or 'warn' in the remote repository to allow pushing into", |
314 | "its current branch; however, this is not recommended unless you", | |
315 | "arranged to update its work tree to match what you pushed in some", | |
316 | "other way.", | |
3d95d92b | 317 | "", |
acd2a45b JH |
318 | "To squelch this message and still keep the default behaviour, set", |
319 | "'receive.denyCurrentBranch' configuration variable to 'refuse'." | |
3d95d92b JH |
320 | }; |
321 | ||
acd2a45b | 322 | static void refuse_unconfigured_deny(void) |
3d95d92b JH |
323 | { |
324 | int i; | |
acd2a45b | 325 | for (i = 0; i < ARRAY_SIZE(refuse_unconfigured_deny_msg); i++) |
a886ba28 | 326 | rp_error("%s", refuse_unconfigured_deny_msg[i]); |
3d95d92b JH |
327 | } |
328 | ||
375881fa JH |
329 | static char *refuse_unconfigured_deny_delete_current_msg[] = { |
330 | "By default, deleting the current branch is denied, because the next", | |
331 | "'git clone' won't result in any file checked out, causing confusion.", | |
747ca245 JH |
332 | "", |
333 | "You can set 'receive.denyDeleteCurrent' configuration variable to", | |
375881fa JH |
334 | "'warn' or 'ignore' in the remote repository to allow deleting the", |
335 | "current branch, with or without a warning message.", | |
747ca245 | 336 | "", |
375881fa | 337 | "To squelch this message, you can set it to 'refuse'." |
747ca245 JH |
338 | }; |
339 | ||
375881fa | 340 | static void refuse_unconfigured_deny_delete_current(void) |
747ca245 JH |
341 | { |
342 | int i; | |
343 | for (i = 0; | |
375881fa | 344 | i < ARRAY_SIZE(refuse_unconfigured_deny_delete_current_msg); |
747ca245 | 345 | i++) |
a886ba28 | 346 | rp_error("%s", refuse_unconfigured_deny_delete_current_msg[i]); |
747ca245 JH |
347 | } |
348 | ||
8aaf7d64 | 349 | static const char *update(struct command *cmd) |
2eca23da | 350 | { |
cfee10a7 | 351 | const char *name = cmd->ref_name; |
6b01ecfe JT |
352 | struct strbuf namespaced_name_buf = STRBUF_INIT; |
353 | const char *namespaced_name; | |
cfee10a7 JH |
354 | unsigned char *old_sha1 = cmd->old_sha1; |
355 | unsigned char *new_sha1 = cmd->new_sha1; | |
3159c8dc | 356 | struct ref_lock *lock; |
2eca23da | 357 | |
061d6b9a MK |
358 | /* only refs/... are allowed */ |
359 | if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) { | |
466dbc42 | 360 | rp_error("refusing to create funny ref '%s' remotely", name); |
8aaf7d64 | 361 | return "funny refname"; |
cfee10a7 | 362 | } |
d8a1deec | 363 | |
6b01ecfe JT |
364 | strbuf_addf(&namespaced_name_buf, "%s%s", get_git_namespace(), name); |
365 | namespaced_name = strbuf_detach(&namespaced_name_buf, NULL); | |
366 | ||
367 | if (is_ref_checked_out(namespaced_name)) { | |
3d95d92b JH |
368 | switch (deny_current_branch) { |
369 | case DENY_IGNORE: | |
986e8239 | 370 | break; |
3d95d92b | 371 | case DENY_WARN: |
466dbc42 | 372 | rp_warning("updating the current branch"); |
986e8239 | 373 | break; |
3d95d92b | 374 | case DENY_REFUSE: |
acd2a45b | 375 | case DENY_UNCONFIGURED: |
466dbc42 | 376 | rp_error("refusing to update checked out branch: %s", name); |
acd2a45b JH |
377 | if (deny_current_branch == DENY_UNCONFIGURED) |
378 | refuse_unconfigured_deny(); | |
3d95d92b JH |
379 | return "branch is currently checked out"; |
380 | } | |
986e8239 JK |
381 | } |
382 | ||
d4f694ba | 383 | if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) { |
8aaf7d64 SP |
384 | error("unpack should have generated %s, " |
385 | "but I can't find it!", sha1_to_hex(new_sha1)); | |
386 | return "bad pack"; | |
cfee10a7 | 387 | } |
747ca245 JH |
388 | |
389 | if (!is_null_sha1(old_sha1) && is_null_sha1(new_sha1)) { | |
390 | if (deny_deletes && !prefixcmp(name, "refs/heads/")) { | |
466dbc42 | 391 | rp_error("denying ref deletion for %s", name); |
747ca245 JH |
392 | return "deletion prohibited"; |
393 | } | |
394 | ||
6b01ecfe | 395 | if (!strcmp(namespaced_name, head_name)) { |
747ca245 JH |
396 | switch (deny_delete_current) { |
397 | case DENY_IGNORE: | |
398 | break; | |
399 | case DENY_WARN: | |
466dbc42 | 400 | rp_warning("deleting the current branch"); |
747ca245 JH |
401 | break; |
402 | case DENY_REFUSE: | |
375881fa JH |
403 | case DENY_UNCONFIGURED: |
404 | if (deny_delete_current == DENY_UNCONFIGURED) | |
405 | refuse_unconfigured_deny_delete_current(); | |
466dbc42 | 406 | rp_error("refusing to delete the current branch: %s", name); |
747ca245 JH |
407 | return "deletion of the current branch prohibited"; |
408 | } | |
409 | } | |
a240de11 | 410 | } |
747ca245 | 411 | |
d4f694ba | 412 | if (deny_non_fast_forwards && !is_null_sha1(new_sha1) && |
ba988a83 | 413 | !is_null_sha1(old_sha1) && |
cc44c765 | 414 | !prefixcmp(name, "refs/heads/")) { |
eab82707 | 415 | struct object *old_object, *new_object; |
11031d7e | 416 | struct commit *old_commit, *new_commit; |
9edd7e46 | 417 | struct commit_list *bases, *ent; |
11031d7e | 418 | |
eab82707 MK |
419 | old_object = parse_object(old_sha1); |
420 | new_object = parse_object(new_sha1); | |
421 | ||
422 | if (!old_object || !new_object || | |
423 | old_object->type != OBJ_COMMIT || | |
424 | new_object->type != OBJ_COMMIT) { | |
425 | error("bad sha1 objects for %s", name); | |
426 | return "bad ref"; | |
427 | } | |
428 | old_commit = (struct commit *)old_object; | |
429 | new_commit = (struct commit *)new_object; | |
9edd7e46 JS |
430 | bases = get_merge_bases(old_commit, new_commit, 1); |
431 | for (ent = bases; ent; ent = ent->next) | |
432 | if (!hashcmp(old_sha1, ent->item->object.sha1)) | |
11031d7e | 433 | break; |
9edd7e46 | 434 | free_commit_list(bases); |
8aaf7d64 | 435 | if (!ent) { |
466dbc42 SP |
436 | rp_error("denying non-fast-forward %s" |
437 | " (you should pull first)", name); | |
a75d7b54 | 438 | return "non-fast-forward"; |
8aaf7d64 | 439 | } |
11031d7e | 440 | } |
1d9e8b56 | 441 | if (run_update_hook(cmd)) { |
466dbc42 | 442 | rp_error("hook declined to update %s", name); |
8aaf7d64 | 443 | return "hook declined"; |
b1bf95bb | 444 | } |
3159c8dc | 445 | |
d4f694ba | 446 | if (is_null_sha1(new_sha1)) { |
28391a80 | 447 | if (!parse_object(old_sha1)) { |
466dbc42 | 448 | rp_warning("Allowing deletion of corrupt ref."); |
28391a80 JS |
449 | old_sha1 = NULL; |
450 | } | |
6b01ecfe | 451 | if (delete_ref(namespaced_name, old_sha1, 0)) { |
466dbc42 | 452 | rp_error("failed to delete %s", name); |
8aaf7d64 | 453 | return "failed to delete"; |
d4f694ba | 454 | } |
8aaf7d64 | 455 | return NULL; /* good */ |
d4f694ba JH |
456 | } |
457 | else { | |
6b01ecfe | 458 | lock = lock_any_ref_for_update(namespaced_name, old_sha1, 0); |
d4f694ba | 459 | if (!lock) { |
466dbc42 | 460 | rp_error("failed to lock %s", name); |
8aaf7d64 | 461 | return "failed to lock"; |
d4f694ba | 462 | } |
ef203f08 | 463 | if (write_ref_sha1(lock, new_sha1, "push")) { |
8aaf7d64 | 464 | return "failed to write"; /* error() already called */ |
ef203f08 | 465 | } |
8aaf7d64 | 466 | return NULL; /* good */ |
19614330 | 467 | } |
2eca23da LT |
468 | } |
469 | ||
19614330 JH |
470 | static char update_post_hook[] = "hooks/post-update"; |
471 | ||
5e1c71fd | 472 | static void run_update_post_hook(struct command *commands) |
19614330 | 473 | { |
5e1c71fd | 474 | struct command *cmd; |
6d525d38 | 475 | int argc; |
9201c707 | 476 | const char **argv; |
6d525d38 | 477 | struct child_process proc; |
19614330 | 478 | |
5e1c71fd JS |
479 | for (argc = 0, cmd = commands; cmd; cmd = cmd->next) { |
480 | if (cmd->error_string) | |
19614330 JH |
481 | continue; |
482 | argc++; | |
483 | } | |
3e6e152c SP |
484 | if (!argc || access(update_post_hook, X_OK) < 0) |
485 | return; | |
486 | argv = xmalloc(sizeof(*argv) * (2 + argc)); | |
19614330 JH |
487 | argv[0] = update_post_hook; |
488 | ||
5e1c71fd | 489 | for (argc = 1, cmd = commands; cmd; cmd = cmd->next) { |
9201c707 | 490 | char *p; |
5e1c71fd | 491 | if (cmd->error_string) |
19614330 | 492 | continue; |
5e1c71fd JS |
493 | p = xmalloc(strlen(cmd->ref_name) + 1); |
494 | strcpy(p, cmd->ref_name); | |
9201c707 | 495 | argv[argc] = p; |
19614330 JH |
496 | argc++; |
497 | } | |
498 | argv[argc] = NULL; | |
6d525d38 SP |
499 | |
500 | memset(&proc, 0, sizeof(proc)); | |
501 | proc.no_stdin = 1; | |
502 | proc.stdout_to_stderr = 1; | |
503 | proc.err = use_sideband ? -1 : 0; | |
504 | proc.argv = argv; | |
505 | ||
506 | if (!start_command(&proc)) { | |
507 | if (use_sideband) | |
508 | copy_to_sideband(proc.err, -1, NULL); | |
509 | finish_command(&proc); | |
510 | } | |
19614330 | 511 | } |
2eca23da | 512 | |
da3efdb1 JS |
513 | static void check_aliased_update(struct command *cmd, struct string_list *list) |
514 | { | |
6b01ecfe JT |
515 | struct strbuf buf = STRBUF_INIT; |
516 | const char *dst_name; | |
da3efdb1 JS |
517 | struct string_list_item *item; |
518 | struct command *dst_cmd; | |
519 | unsigned char sha1[20]; | |
520 | char cmd_oldh[41], cmd_newh[41], dst_oldh[41], dst_newh[41]; | |
521 | int flag; | |
522 | ||
6b01ecfe JT |
523 | strbuf_addf(&buf, "%s%s", get_git_namespace(), cmd->ref_name); |
524 | dst_name = resolve_ref(buf.buf, sha1, 0, &flag); | |
525 | strbuf_release(&buf); | |
da3efdb1 JS |
526 | |
527 | if (!(flag & REF_ISSYMREF)) | |
528 | return; | |
529 | ||
6b01ecfe JT |
530 | dst_name = strip_namespace(dst_name); |
531 | if (!dst_name) { | |
532 | rp_error("refusing update to broken symref '%s'", cmd->ref_name); | |
533 | cmd->skip_update = 1; | |
534 | cmd->error_string = "broken symref"; | |
535 | return; | |
536 | } | |
537 | ||
e8c8b713 | 538 | if ((item = string_list_lookup(list, dst_name)) == NULL) |
da3efdb1 JS |
539 | return; |
540 | ||
541 | cmd->skip_update = 1; | |
542 | ||
543 | dst_cmd = (struct command *) item->util; | |
544 | ||
545 | if (!hashcmp(cmd->old_sha1, dst_cmd->old_sha1) && | |
546 | !hashcmp(cmd->new_sha1, dst_cmd->new_sha1)) | |
547 | return; | |
548 | ||
549 | dst_cmd->skip_update = 1; | |
550 | ||
551 | strcpy(cmd_oldh, find_unique_abbrev(cmd->old_sha1, DEFAULT_ABBREV)); | |
0e71bc30 | 552 | strcpy(cmd_newh, find_unique_abbrev(cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 | 553 | strcpy(dst_oldh, find_unique_abbrev(dst_cmd->old_sha1, DEFAULT_ABBREV)); |
0e71bc30 | 554 | strcpy(dst_newh, find_unique_abbrev(dst_cmd->new_sha1, DEFAULT_ABBREV)); |
da3efdb1 JS |
555 | rp_error("refusing inconsistent update between symref '%s' (%s..%s) and" |
556 | " its target '%s' (%s..%s)", | |
557 | cmd->ref_name, cmd_oldh, cmd_newh, | |
558 | dst_cmd->ref_name, dst_oldh, dst_newh); | |
559 | ||
560 | cmd->error_string = dst_cmd->error_string = | |
561 | "inconsistent aliased update"; | |
562 | } | |
563 | ||
564 | static void check_aliased_updates(struct command *commands) | |
565 | { | |
566 | struct command *cmd; | |
183113a5 | 567 | struct string_list ref_list = STRING_LIST_INIT_NODUP; |
da3efdb1 JS |
568 | |
569 | for (cmd = commands; cmd; cmd = cmd->next) { | |
570 | struct string_list_item *item = | |
1d2f80fa | 571 | string_list_append(&ref_list, cmd->ref_name); |
da3efdb1 JS |
572 | item->util = (void *)cmd; |
573 | } | |
574 | sort_string_list(&ref_list); | |
575 | ||
576 | for (cmd = commands; cmd; cmd = cmd->next) | |
577 | check_aliased_update(cmd, &ref_list); | |
578 | ||
579 | string_list_clear(&ref_list, 0); | |
580 | } | |
581 | ||
5e1c71fd | 582 | static void execute_commands(struct command *commands, const char *unpacker_error) |
575f4974 | 583 | { |
5e1c71fd | 584 | struct command *cmd; |
747ca245 | 585 | unsigned char sha1[20]; |
8aaf7d64 SP |
586 | |
587 | if (unpacker_error) { | |
5e1c71fd | 588 | for (cmd = commands; cmd; cmd = cmd->next) |
8aaf7d64 | 589 | cmd->error_string = "n/a (unpacker error)"; |
8aaf7d64 SP |
590 | return; |
591 | } | |
592 | ||
5e1c71fd JS |
593 | if (run_receive_hook(commands, pre_receive_hook)) { |
594 | for (cmd = commands; cmd; cmd = cmd->next) | |
05ef58ec | 595 | cmd->error_string = "pre-receive hook declined"; |
05ef58ec SP |
596 | return; |
597 | } | |
598 | ||
da3efdb1 JS |
599 | check_aliased_updates(commands); |
600 | ||
747ca245 JH |
601 | head_name = resolve_ref("HEAD", sha1, 0, NULL); |
602 | ||
5e1c71fd | 603 | for (cmd = commands; cmd; cmd = cmd->next) |
da3efdb1 JS |
604 | if (!cmd->skip_update) |
605 | cmd->error_string = update(cmd); | |
575f4974 LT |
606 | } |
607 | ||
5e1c71fd | 608 | static struct command *read_head_info(void) |
575f4974 | 609 | { |
5e1c71fd | 610 | struct command *commands = NULL; |
eb1af2df | 611 | struct command **p = &commands; |
575f4974 LT |
612 | for (;;) { |
613 | static char line[1000]; | |
eb1af2df LT |
614 | unsigned char old_sha1[20], new_sha1[20]; |
615 | struct command *cmd; | |
cfee10a7 JH |
616 | char *refname; |
617 | int len, reflen; | |
eb1af2df LT |
618 | |
619 | len = packet_read_line(0, line, sizeof(line)); | |
575f4974 LT |
620 | if (!len) |
621 | break; | |
eb1af2df LT |
622 | if (line[len-1] == '\n') |
623 | line[--len] = 0; | |
624 | if (len < 83 || | |
625 | line[40] != ' ' || | |
626 | line[81] != ' ' || | |
627 | get_sha1_hex(line, old_sha1) || | |
628 | get_sha1_hex(line + 41, new_sha1)) | |
cfee10a7 JH |
629 | die("protocol error: expected old/new/ref, got '%s'", |
630 | line); | |
631 | ||
632 | refname = line + 82; | |
633 | reflen = strlen(refname); | |
634 | if (reflen + 82 < len) { | |
635 | if (strstr(refname + reflen + 1, "report-status")) | |
636 | report_status = 1; | |
38a81b4e SP |
637 | if (strstr(refname + reflen + 1, "side-band-64k")) |
638 | use_sideband = LARGE_PACKET_MAX; | |
cfee10a7 | 639 | } |
da3efdb1 | 640 | cmd = xcalloc(1, sizeof(struct command) + len - 80); |
e702496e SP |
641 | hashcpy(cmd->old_sha1, old_sha1); |
642 | hashcpy(cmd->new_sha1, new_sha1); | |
eb1af2df | 643 | memcpy(cmd->ref_name, line + 82, len - 81); |
eb1af2df LT |
644 | *p = cmd; |
645 | p = &cmd->next; | |
575f4974 | 646 | } |
5e1c71fd | 647 | return commands; |
575f4974 LT |
648 | } |
649 | ||
fc04c412 SP |
650 | static const char *parse_pack_header(struct pack_header *hdr) |
651 | { | |
a69e5429 JH |
652 | switch (read_pack_header(0, hdr)) { |
653 | case PH_ERROR_EOF: | |
654 | return "eof before pack header was fully read"; | |
655 | ||
656 | case PH_ERROR_PACK_SIGNATURE: | |
fc04c412 | 657 | return "protocol error (pack signature mismatch detected)"; |
a69e5429 JH |
658 | |
659 | case PH_ERROR_PROTOCOL: | |
fc04c412 | 660 | return "protocol error (pack version unsupported)"; |
a69e5429 JH |
661 | |
662 | default: | |
663 | return "unknown error in parse_pack_header"; | |
664 | ||
665 | case 0: | |
666 | return NULL; | |
667 | } | |
fc04c412 SP |
668 | } |
669 | ||
576162a4 NP |
670 | static const char *pack_lockfile; |
671 | ||
5a277f3f | 672 | static const char *unpack(void) |
575f4974 | 673 | { |
fc04c412 SP |
674 | struct pack_header hdr; |
675 | const char *hdr_err; | |
676 | char hdr_arg[38]; | |
fc04c412 SP |
677 | |
678 | hdr_err = parse_pack_header(&hdr); | |
679 | if (hdr_err) | |
680 | return hdr_err; | |
6e1c2344 RJ |
681 | snprintf(hdr_arg, sizeof(hdr_arg), |
682 | "--pack_header=%"PRIu32",%"PRIu32, | |
fc04c412 SP |
683 | ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries)); |
684 | ||
685 | if (ntohl(hdr.hdr_entries) < unpack_limit) { | |
20dc0016 | 686 | int code, i = 0; |
5a277f3f | 687 | const char *unpacker[4]; |
20dc0016 MK |
688 | unpacker[i++] = "unpack-objects"; |
689 | if (receive_fsck_objects) | |
690 | unpacker[i++] = "--strict"; | |
691 | unpacker[i++] = hdr_arg; | |
692 | unpacker[i++] = NULL; | |
9b0b5093 | 693 | code = run_command_v_opt(unpacker, RUN_GIT_CMD); |
2ff4d1ab | 694 | if (!code) |
fc04c412 | 695 | return NULL; |
2ff4d1ab | 696 | return "unpack-objects abnormal exit"; |
576162a4 | 697 | } else { |
20dc0016 MK |
698 | const char *keeper[7]; |
699 | int s, status, i = 0; | |
576162a4 | 700 | char keep_arg[256]; |
e8016abf | 701 | struct child_process ip; |
576162a4 | 702 | |
85e72830 | 703 | s = sprintf(keep_arg, "--keep=receive-pack %"PRIuMAX" on ", (uintmax_t) getpid()); |
576162a4 NP |
704 | if (gethostname(keep_arg + s, sizeof(keep_arg) - s)) |
705 | strcpy(keep_arg + s, "localhost"); | |
706 | ||
20dc0016 MK |
707 | keeper[i++] = "index-pack"; |
708 | keeper[i++] = "--stdin"; | |
709 | if (receive_fsck_objects) | |
710 | keeper[i++] = "--strict"; | |
711 | keeper[i++] = "--fix-thin"; | |
712 | keeper[i++] = hdr_arg; | |
713 | keeper[i++] = keep_arg; | |
714 | keeper[i++] = NULL; | |
e8016abf SP |
715 | memset(&ip, 0, sizeof(ip)); |
716 | ip.argv = keeper; | |
717 | ip.out = -1; | |
718 | ip.git_cmd = 1; | |
2ff4d1ab JS |
719 | status = start_command(&ip); |
720 | if (status) { | |
576162a4 | 721 | return "index-pack fork failed"; |
2ff4d1ab | 722 | } |
106764e6 | 723 | pack_lockfile = index_pack_lockfile(ip.out); |
e72ae288 | 724 | close(ip.out); |
e8016abf SP |
725 | status = finish_command(&ip); |
726 | if (!status) { | |
576162a4 NP |
727 | reprepare_packed_git(); |
728 | return NULL; | |
729 | } | |
730 | return "index-pack abnormal exit"; | |
cfee10a7 JH |
731 | } |
732 | } | |
733 | ||
5e1c71fd | 734 | static void report(struct command *commands, const char *unpack_status) |
cfee10a7 JH |
735 | { |
736 | struct command *cmd; | |
38a81b4e SP |
737 | struct strbuf buf = STRBUF_INIT; |
738 | ||
739 | packet_buf_write(&buf, "unpack %s\n", | |
740 | unpack_status ? unpack_status : "ok"); | |
cfee10a7 JH |
741 | for (cmd = commands; cmd; cmd = cmd->next) { |
742 | if (!cmd->error_string) | |
38a81b4e SP |
743 | packet_buf_write(&buf, "ok %s\n", |
744 | cmd->ref_name); | |
cfee10a7 | 745 | else |
38a81b4e SP |
746 | packet_buf_write(&buf, "ng %s %s\n", |
747 | cmd->ref_name, cmd->error_string); | |
575f4974 | 748 | } |
38a81b4e SP |
749 | packet_buf_flush(&buf); |
750 | ||
751 | if (use_sideband) | |
752 | send_sideband(1, 1, buf.buf, buf.len, use_sideband); | |
753 | else | |
754 | safe_write(1, buf.buf, buf.len); | |
755 | strbuf_release(&buf); | |
575f4974 LT |
756 | } |
757 | ||
5e1c71fd | 758 | static int delete_only(struct command *commands) |
d4f694ba | 759 | { |
5e1c71fd JS |
760 | struct command *cmd; |
761 | for (cmd = commands; cmd; cmd = cmd->next) { | |
d4f694ba JH |
762 | if (!is_null_sha1(cmd->new_sha1)) |
763 | return 0; | |
d4f694ba JH |
764 | } |
765 | return 1; | |
766 | } | |
767 | ||
cff38a5e | 768 | static void add_one_alternate_sha1(const unsigned char sha1[20], void *unused) |
d79796bc | 769 | { |
cff38a5e JK |
770 | add_extra_ref(".have", sha1, 0); |
771 | } | |
772 | ||
773 | static void collect_one_alternate_ref(const struct ref *ref, void *data) | |
774 | { | |
775 | struct sha1_array *sa = data; | |
776 | sha1_array_append(sa, ref->old_sha1); | |
d79796bc JH |
777 | } |
778 | ||
779 | static void add_alternate_refs(void) | |
780 | { | |
cff38a5e JK |
781 | struct sha1_array sa = SHA1_ARRAY_INIT; |
782 | for_each_alternate_ref(collect_one_alternate_ref, &sa); | |
783 | sha1_array_for_each_unique(&sa, add_one_alternate_sha1, NULL); | |
784 | sha1_array_clear(&sa); | |
d79796bc JH |
785 | } |
786 | ||
be5908ae | 787 | int cmd_receive_pack(int argc, const char **argv, const char *prefix) |
575f4974 | 788 | { |
42526b47 SP |
789 | int advertise_refs = 0; |
790 | int stateless_rpc = 0; | |
d0efc8a7 | 791 | int i; |
8d630132 | 792 | char *dir = NULL; |
5e1c71fd | 793 | struct command *commands; |
575f4974 | 794 | |
bbc30f99 JK |
795 | packet_trace_identity("receive-pack"); |
796 | ||
575f4974 LT |
797 | argv++; |
798 | for (i = 1; i < argc; i++) { | |
be5908ae | 799 | const char *arg = *argv++; |
575f4974 LT |
800 | |
801 | if (*arg == '-') { | |
42526b47 SP |
802 | if (!strcmp(arg, "--advertise-refs")) { |
803 | advertise_refs = 1; | |
804 | continue; | |
805 | } | |
806 | if (!strcmp(arg, "--stateless-rpc")) { | |
807 | stateless_rpc = 1; | |
808 | continue; | |
809 | } | |
810 | ||
575f4974 LT |
811 | usage(receive_pack_usage); |
812 | } | |
d0efc8a7 LT |
813 | if (dir) |
814 | usage(receive_pack_usage); | |
be5908ae | 815 | dir = xstrdup(arg); |
575f4974 LT |
816 | } |
817 | if (!dir) | |
818 | usage(receive_pack_usage); | |
819 | ||
e1464ca7 | 820 | setup_path(); |
5c09f321 | 821 | |
3159c8dc | 822 | if (!enter_repo(dir, 0)) |
05ac6b34 | 823 | die("'%s' does not appear to be a git repository", dir); |
575f4974 | 824 | |
a0022eeb JH |
825 | if (is_repository_shallow()) |
826 | die("attempt to push into a shallow repository"); | |
827 | ||
ef90d6d4 | 828 | git_config(receive_pack_config, NULL); |
6fb75bed | 829 | |
e28714c5 JH |
830 | if (0 <= transfer_unpack_limit) |
831 | unpack_limit = transfer_unpack_limit; | |
832 | else if (0 <= receive_unpack_limit) | |
833 | unpack_limit = receive_unpack_limit; | |
834 | ||
42526b47 SP |
835 | if (advertise_refs || !stateless_rpc) { |
836 | add_alternate_refs(); | |
837 | write_head_info(); | |
838 | clear_extra_refs(); | |
575f4974 | 839 | |
42526b47 SP |
840 | /* EOF */ |
841 | packet_flush(1); | |
842 | } | |
843 | if (advertise_refs) | |
844 | return 0; | |
575f4974 | 845 | |
5e1c71fd | 846 | if ((commands = read_head_info()) != NULL) { |
d4f694ba JH |
847 | const char *unpack_status = NULL; |
848 | ||
849 | if (!delete_only(commands)) | |
5a277f3f | 850 | unpack_status = unpack(); |
5e1c71fd | 851 | execute_commands(commands, unpack_status); |
576162a4 | 852 | if (pack_lockfile) |
691f1a28 | 853 | unlink_or_warn(pack_lockfile); |
cfee10a7 | 854 | if (report_status) |
5e1c71fd JS |
855 | report(commands, unpack_status); |
856 | run_receive_hook(commands, post_receive_hook); | |
8e663d9e | 857 | run_update_post_hook(commands); |
77e3efbf JH |
858 | if (auto_gc) { |
859 | const char *argv_gc_auto[] = { | |
860 | "gc", "--auto", "--quiet", NULL, | |
861 | }; | |
862 | run_command_v_opt(argv_gc_auto, RUN_GIT_CMD); | |
863 | } | |
864 | if (auto_update_server_info) | |
865 | update_server_info(0); | |
7f8e9828 | 866 | } |
38a81b4e SP |
867 | if (use_sideband) |
868 | packet_flush(1); | |
575f4974 LT |
869 | return 0; |
870 | } |