5 #include "run-command.h"
10 static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
12 static int deny_non_fast_forwards = 0;
13 static int receive_unpack_limit = -1;
14 static int transfer_unpack_limit = -1;
15 static int unpack_limit = 100;
16 static int report_status;
18 static char capabilities[] = " report-status delete-refs ";
19 static int capabilities_sent;
21 static int receive_pack_config(const char *var, const char *value)
23 if (strcmp(var, "receive.denynonfastforwards") == 0) {
24 deny_non_fast_forwards = git_config_bool(var, value);
28 if (strcmp(var, "receive.unpacklimit") == 0) {
29 receive_unpack_limit = git_config_int(var, value);
33 if (strcmp(var, "transfer.unpacklimit") == 0) {
34 transfer_unpack_limit = git_config_int(var, value);
38 return git_default_config(var, value);
41 static int show_ref(const char *path, const unsigned char *sha1, int flag, void *cb_data)
43 if (capabilities_sent)
44 packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
46 packet_write(1, "%s %s%c%s\n",
47 sha1_to_hex(sha1), path, 0, capabilities);
48 capabilities_sent = 1;
52 static void write_head_info(void)
54 for_each_ref(show_ref, NULL);
55 if (!capabilities_sent)
56 show_ref("capabilities^{}", null_sha1, 0, NULL);
62 const char *error_string;
63 unsigned char old_sha1[20];
64 unsigned char new_sha1[20];
65 char ref_name[FLEX_ARRAY]; /* more */
68 static struct command *commands;
70 static const char pre_receive_hook[] = "hooks/pre-receive";
71 static const char post_receive_hook[] = "hooks/post-receive";
73 static int hook_status(int code, const char *hook_name)
78 case -ERR_RUN_COMMAND_FORK:
79 return error("hook fork failed");
80 case -ERR_RUN_COMMAND_EXEC:
81 return error("hook execute failed");
82 case -ERR_RUN_COMMAND_PIPE:
83 return error("hook pipe failed");
84 case -ERR_RUN_COMMAND_WAITPID:
85 return error("waitpid failed");
86 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
87 return error("waitpid is confused");
88 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
89 return error("%s died of signal", hook_name);
90 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
91 return error("%s died strangely", hook_name);
93 error("%s exited with error code %d", hook_name, -code);
98 static int run_hook(const char *hook_name)
100 static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
102 struct child_process proc;
104 int have_input = 0, code;
106 for (cmd = commands; !have_input && cmd; cmd = cmd->next) {
107 if (!cmd->error_string)
111 if (!have_input || access(hook_name, X_OK) < 0)
117 memset(&proc, 0, sizeof(proc));
120 proc.stdout_to_stderr = 1;
122 code = start_command(&proc);
124 return hook_status(code, hook_name);
125 for (cmd = commands; cmd; cmd = cmd->next) {
126 if (!cmd->error_string) {
127 size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n",
128 sha1_to_hex(cmd->old_sha1),
129 sha1_to_hex(cmd->new_sha1),
131 if (write_in_full(proc.in, buf, n) != n)
135 return hook_status(finish_command(&proc), hook_name);
138 static int run_update_hook(struct command *cmd)
140 static const char update_hook[] = "hooks/update";
141 struct child_process proc;
144 if (access(update_hook, X_OK) < 0)
147 argv[0] = update_hook;
148 argv[1] = cmd->ref_name;
149 argv[2] = sha1_to_hex(cmd->old_sha1);
150 argv[3] = sha1_to_hex(cmd->new_sha1);
153 memset(&proc, 0, sizeof(proc));
156 proc.stdout_to_stderr = 1;
158 return hook_status(run_command(&proc), update_hook);
161 static const char *update(struct command *cmd)
163 const char *name = cmd->ref_name;
164 unsigned char *old_sha1 = cmd->old_sha1;
165 unsigned char *new_sha1 = cmd->new_sha1;
166 struct ref_lock *lock;
168 if (!prefixcmp(name, "refs/") && check_ref_format(name + 5)) {
169 error("refusing to create funny ref '%s' remotely", name);
170 return "funny refname";
173 if (!is_null_sha1(new_sha1) && !has_sha1_file(new_sha1)) {
174 error("unpack should have generated %s, "
175 "but I can't find it!", sha1_to_hex(new_sha1));
178 if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
179 !is_null_sha1(old_sha1) &&
180 !prefixcmp(name, "refs/heads/")) {
181 struct object *old_object, *new_object;
182 struct commit *old_commit, *new_commit;
183 struct commit_list *bases, *ent;
185 old_object = parse_object(old_sha1);
186 new_object = parse_object(new_sha1);
188 if (!old_object || !new_object ||
189 old_object->type != OBJ_COMMIT ||
190 new_object->type != OBJ_COMMIT) {
191 error("bad sha1 objects for %s", name);
194 old_commit = (struct commit *)old_object;
195 new_commit = (struct commit *)new_object;
196 bases = get_merge_bases(old_commit, new_commit, 1);
197 for (ent = bases; ent; ent = ent->next)
198 if (!hashcmp(old_sha1, ent->item->object.sha1))
200 free_commit_list(bases);
202 error("denying non-fast forward %s"
203 " (you should pull first)", name);
204 return "non-fast forward";
207 if (run_update_hook(cmd)) {
208 error("hook declined to update %s", name);
209 return "hook declined";
212 if (is_null_sha1(new_sha1)) {
213 if (!parse_object(old_sha1)) {
214 warning ("Allowing deletion of corrupt ref.");
217 if (delete_ref(name, old_sha1)) {
218 error("failed to delete %s", name);
219 return "failed to delete";
221 return NULL; /* good */
224 lock = lock_any_ref_for_update(name, old_sha1, 0);
226 error("failed to lock %s", name);
227 return "failed to lock";
229 if (write_ref_sha1(lock, new_sha1, "push")) {
230 return "failed to write"; /* error() already called */
232 return NULL; /* good */
236 static char update_post_hook[] = "hooks/post-update";
238 static void run_update_post_hook(struct command *cmd)
240 struct command *cmd_p;
244 for (argc = 0, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
245 if (cmd_p->error_string)
249 if (!argc || access(update_post_hook, X_OK) < 0)
251 argv = xmalloc(sizeof(*argv) * (2 + argc));
252 argv[0] = update_post_hook;
254 for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
256 if (cmd_p->error_string)
258 p = xmalloc(strlen(cmd_p->ref_name) + 1);
259 strcpy(p, cmd_p->ref_name);
264 run_command_v_opt(argv, RUN_COMMAND_NO_STDIN
265 | RUN_COMMAND_STDOUT_TO_STDERR);
268 static void execute_commands(const char *unpacker_error)
270 struct command *cmd = commands;
272 if (unpacker_error) {
274 cmd->error_string = "n/a (unpacker error)";
280 if (run_hook(pre_receive_hook)) {
282 cmd->error_string = "pre-receive hook declined";
289 cmd->error_string = update(cmd);
294 static void read_head_info(void)
296 struct command **p = &commands;
298 static char line[1000];
299 unsigned char old_sha1[20], new_sha1[20];
304 len = packet_read_line(0, line, sizeof(line));
307 if (line[len-1] == '\n')
312 get_sha1_hex(line, old_sha1) ||
313 get_sha1_hex(line + 41, new_sha1))
314 die("protocol error: expected old/new/ref, got '%s'",
318 reflen = strlen(refname);
319 if (reflen + 82 < len) {
320 if (strstr(refname + reflen + 1, "report-status"))
323 cmd = xmalloc(sizeof(struct command) + len - 80);
324 hashcpy(cmd->old_sha1, old_sha1);
325 hashcpy(cmd->new_sha1, new_sha1);
326 memcpy(cmd->ref_name, line + 82, len - 81);
327 cmd->error_string = NULL;
334 static const char *parse_pack_header(struct pack_header *hdr)
336 switch (read_pack_header(0, hdr)) {
338 return "eof before pack header was fully read";
340 case PH_ERROR_PACK_SIGNATURE:
341 return "protocol error (pack signature mismatch detected)";
343 case PH_ERROR_PROTOCOL:
344 return "protocol error (pack version unsupported)";
347 return "unknown error in parse_pack_header";
354 static const char *pack_lockfile;
356 static const char *unpack(void)
358 struct pack_header hdr;
362 hdr_err = parse_pack_header(&hdr);
365 snprintf(hdr_arg, sizeof(hdr_arg), "--pack_header=%u,%u",
366 ntohl(hdr.hdr_version), ntohl(hdr.hdr_entries));
368 if (ntohl(hdr.hdr_entries) < unpack_limit) {
370 const char *unpacker[3];
371 unpacker[0] = "unpack-objects";
372 unpacker[1] = hdr_arg;
374 code = run_command_v_opt(unpacker, RUN_GIT_CMD);
378 case -ERR_RUN_COMMAND_FORK:
379 return "unpack fork failed";
380 case -ERR_RUN_COMMAND_EXEC:
381 return "unpack execute failed";
382 case -ERR_RUN_COMMAND_WAITPID:
383 return "waitpid failed";
384 case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
385 return "waitpid is confused";
386 case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
387 return "unpacker died of signal";
388 case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
389 return "unpacker died strangely";
391 return "unpacker exited with error code";
394 const char *keeper[6];
397 struct child_process ip;
399 s = sprintf(keep_arg, "--keep=receive-pack %i on ", getpid());
400 if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
401 strcpy(keep_arg + s, "localhost");
403 keeper[0] = "index-pack";
404 keeper[1] = "--stdin";
405 keeper[2] = "--fix-thin";
407 keeper[4] = keep_arg;
409 memset(&ip, 0, sizeof(ip));
413 if (start_command(&ip))
414 return "index-pack fork failed";
415 pack_lockfile = index_pack_lockfile(ip.out);
416 status = finish_command(&ip);
418 reprepare_packed_git();
421 return "index-pack abnormal exit";
425 static void report(const char *unpack_status)
428 packet_write(1, "unpack %s\n",
429 unpack_status ? unpack_status : "ok");
430 for (cmd = commands; cmd; cmd = cmd->next) {
431 if (!cmd->error_string)
432 packet_write(1, "ok %s\n",
435 packet_write(1, "ng %s %s\n",
436 cmd->ref_name, cmd->error_string);
441 static int delete_only(struct command *cmd)
444 if (!is_null_sha1(cmd->new_sha1))
451 int main(int argc, char **argv)
457 for (i = 1; i < argc; i++) {
461 /* Do flag handling here */
462 usage(receive_pack_usage);
465 usage(receive_pack_usage);
469 usage(receive_pack_usage);
471 if (!enter_repo(dir, 0))
472 die("'%s': unable to chdir or not a git archive", dir);
474 if (is_repository_shallow())
475 die("attempt to push into a shallow repository");
477 git_config(receive_pack_config);
479 if (0 <= transfer_unpack_limit)
480 unpack_limit = transfer_unpack_limit;
481 else if (0 <= receive_unpack_limit)
482 unpack_limit = receive_unpack_limit;
491 const char *unpack_status = NULL;
493 if (!delete_only(commands))
494 unpack_status = unpack();
495 execute_commands(unpack_status);
497 unlink(pack_lockfile);
499 report(unpack_status);
500 run_hook(post_receive_hook);
501 run_update_post_hook(commands);