checkout: tone down the "forked status" diagnostic messages
[gitweb.git] / receive-pack.c
index 675c88f4924086667deddc945011f6037ee8a8eb..326749583221d0f5e81f58608a23ab1dc1601177 100644 (file)
@@ -67,47 +67,11 @@ struct command {
 
 static struct command *commands;
 
-static const char update_hook[] = "hooks/update";
 static const char pre_receive_hook[] = "hooks/pre-receive";
 static const char post_receive_hook[] = "hooks/post-receive";
 
-static int run_hook(const char *hook_name,
-       struct command *first_cmd,
-       int single)
+static int hook_status(int code, const char *hook_name)
 {
-       struct command *cmd;
-       int argc, code;
-       const char **argv;
-
-       for (argc = 0, cmd = first_cmd; cmd; cmd = cmd->next) {
-               if (!cmd->error_string)
-                       argc += 3;
-               if (single)
-                       break;
-       }
-
-       if (!argc || access(hook_name, X_OK) < 0)
-               return 0;
-
-       argv = xmalloc(sizeof(*argv) * (2 + argc));
-       argv[0] = hook_name;
-       for (argc = 1, cmd = first_cmd; cmd; cmd = cmd->next) {
-               if (!cmd->error_string) {
-                       argv[argc++] = xstrdup(cmd->ref_name);
-                       argv[argc++] = xstrdup(sha1_to_hex(cmd->old_sha1));
-                       argv[argc++] = xstrdup(sha1_to_hex(cmd->new_sha1));
-               }
-               if (single)
-                       break;
-       }
-       argv[argc] = NULL;
-
-       code = run_command_v_opt(argv,
-               RUN_COMMAND_NO_STDIN | RUN_COMMAND_STDOUT_TO_STDERR);
-       while (--argc > 0)
-               free((char*)argv[argc]);
-       free(argv);
-
        switch (code) {
        case 0:
                return 0;
@@ -115,6 +79,8 @@ static int run_hook(const char *hook_name,
                return error("hook fork failed");
        case -ERR_RUN_COMMAND_EXEC:
                return error("hook execute failed");
+       case -ERR_RUN_COMMAND_PIPE:
+               return error("hook pipe failed");
        case -ERR_RUN_COMMAND_WAITPID:
                return error("waitpid failed");
        case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
@@ -129,6 +95,69 @@ static int run_hook(const char *hook_name,
        }
 }
 
+static int run_hook(const char *hook_name)
+{
+       static char buf[sizeof(commands->old_sha1) * 2 + PATH_MAX + 4];
+       struct command *cmd;
+       struct child_process proc;
+       const char *argv[2];
+       int have_input = 0, code;
+
+       for (cmd = commands; !have_input && cmd; cmd = cmd->next) {
+               if (!cmd->error_string)
+                       have_input = 1;
+       }
+
+       if (!have_input || access(hook_name, X_OK) < 0)
+               return 0;
+
+       argv[0] = hook_name;
+       argv[1] = NULL;
+
+       memset(&proc, 0, sizeof(proc));
+       proc.argv = argv;
+       proc.in = -1;
+       proc.stdout_to_stderr = 1;
+
+       code = start_command(&proc);
+       if (code)
+               return hook_status(code, hook_name);
+       for (cmd = commands; cmd; cmd = cmd->next) {
+               if (!cmd->error_string) {
+                       size_t n = snprintf(buf, sizeof(buf), "%s %s %s\n",
+                               sha1_to_hex(cmd->old_sha1),
+                               sha1_to_hex(cmd->new_sha1),
+                               cmd->ref_name);
+                       if (write_in_full(proc.in, buf, n) != n)
+                               break;
+               }
+       }
+       return hook_status(finish_command(&proc), hook_name);
+}
+
+static int run_update_hook(struct command *cmd)
+{
+       static const char update_hook[] = "hooks/update";
+       struct child_process proc;
+       const char *argv[5];
+
+       if (access(update_hook, X_OK) < 0)
+               return 0;
+
+       argv[0] = update_hook;
+       argv[1] = cmd->ref_name;
+       argv[2] = sha1_to_hex(cmd->old_sha1);
+       argv[3] = sha1_to_hex(cmd->new_sha1);
+       argv[4] = NULL;
+
+       memset(&proc, 0, sizeof(proc));
+       proc.argv = argv;
+       proc.no_stdin = 1;
+       proc.stdout_to_stderr = 1;
+
+       return hook_status(run_command(&proc), update_hook);
+}
+
 static const char *update(struct command *cmd)
 {
        const char *name = cmd->ref_name;
@@ -136,8 +165,9 @@ static const char *update(struct command *cmd)
        unsigned char *new_sha1 = cmd->new_sha1;
        struct ref_lock *lock;
 
-       if (!prefixcmp(name, "refs/") && check_ref_format(name + 5)) {
-               error("refusing to create funny ref '%s' locally", name);
+       /* only refs/... are allowed */
+       if (prefixcmp(name, "refs/") || check_ref_format(name + 5)) {
+               error("refusing to create funny ref '%s' remotely", name);
                return "funny refname";
        }
 
@@ -149,11 +179,21 @@ static const char *update(struct command *cmd)
        if (deny_non_fast_forwards && !is_null_sha1(new_sha1) &&
            !is_null_sha1(old_sha1) &&
            !prefixcmp(name, "refs/heads/")) {
+               struct object *old_object, *new_object;
                struct commit *old_commit, *new_commit;
                struct commit_list *bases, *ent;
 
-               old_commit = (struct commit *)parse_object(old_sha1);
-               new_commit = (struct commit *)parse_object(new_sha1);
+               old_object = parse_object(old_sha1);
+               new_object = parse_object(new_sha1);
+
+               if (!old_object || !new_object ||
+                   old_object->type != OBJ_COMMIT ||
+                   new_object->type != OBJ_COMMIT) {
+                       error("bad sha1 objects for %s", name);
+                       return "bad ref";
+               }
+               old_commit = (struct commit *)old_object;
+               new_commit = (struct commit *)new_object;
                bases = get_merge_bases(old_commit, new_commit, 1);
                for (ent = bases; ent; ent = ent->next)
                        if (!hashcmp(old_sha1, ent->item->object.sha1))
@@ -165,22 +205,24 @@ static const char *update(struct command *cmd)
                        return "non-fast forward";
                }
        }
-       if (run_hook(update_hook, cmd, 1)) {
+       if (run_update_hook(cmd)) {
                error("hook declined to update %s", name);
                return "hook declined";
        }
 
        if (is_null_sha1(new_sha1)) {
+               if (!parse_object(old_sha1)) {
+                       warning ("Allowing deletion of corrupt ref.");
+                       old_sha1 = NULL;
+               }
                if (delete_ref(name, old_sha1)) {
                        error("failed to delete %s", name);
                        return "failed to delete";
                }
-               fprintf(stderr, "%s: %s -> deleted\n", name,
-                       sha1_to_hex(old_sha1));
                return NULL; /* good */
        }
        else {
-               lock = lock_any_ref_for_update(name, old_sha1);
+               lock = lock_any_ref_for_update(name, old_sha1, 0);
                if (!lock) {
                        error("failed to lock %s", name);
                        return "failed to lock";
@@ -188,8 +230,6 @@ static const char *update(struct command *cmd)
                if (write_ref_sha1(lock, new_sha1, "push")) {
                        return "failed to write"; /* error() already called */
                }
-               fprintf(stderr, "%s: %s -> %s\n", name,
-                       sha1_to_hex(old_sha1), sha1_to_hex(new_sha1));
                return NULL; /* good */
        }
 }
@@ -238,7 +278,7 @@ static void execute_commands(const char *unpacker_error)
                return;
        }
 
-       if (run_hook(pre_receive_hook, commands, 0)) {
+       if (run_hook(pre_receive_hook)) {
                while (cmd) {
                        cmd->error_string = "pre-receive hook declined";
                        cmd = cmd->next;
@@ -353,10 +393,9 @@ static const char *unpack(void)
                }
        } else {
                const char *keeper[6];
-               int fd[2], s, len, status;
-               pid_t pid;
+               int s, status;
                char keep_arg[256];
-               char packname[46];
+               struct child_process ip;
 
                s = sprintf(keep_arg, "--keep=receive-pack %i on ", getpid());
                if (gethostname(keep_arg + s, sizeof(keep_arg) - s))
@@ -368,49 +407,15 @@ static const char *unpack(void)
                keeper[3] = hdr_arg;
                keeper[4] = keep_arg;
                keeper[5] = NULL;
-
-               if (pipe(fd) < 0)
-                       return "index-pack pipe failed";
-               pid = fork();
-               if (pid < 0)
+               memset(&ip, 0, sizeof(ip));
+               ip.argv = keeper;
+               ip.out = -1;
+               ip.git_cmd = 1;
+               if (start_command(&ip))
                        return "index-pack fork failed";
-               if (!pid) {
-                       dup2(fd[1], 1);
-                       close(fd[1]);
-                       close(fd[0]);
-                       execv_git_cmd(keeper);
-                       die("execv of index-pack failed");
-               }
-               close(fd[1]);
-
-               /*
-                * The first thing we expects from index-pack's output
-                * is "pack\t%40s\n" or "keep\t%40s\n" (46 bytes) where
-                * %40s is the newly created pack SHA1 name.  In the "keep"
-                * case, we need it to remove the corresponding .keep file
-                * later on.  If we don't get that then tough luck with it.
-                */
-               for (len = 0;
-                    len < 46 && (s = xread(fd[0], packname+len, 46-len)) > 0;
-                    len += s);
-               close(fd[0]);
-               if (len == 46 && packname[45] == '\n' &&
-                   memcmp(packname, "keep\t", 5) == 0) {
-                       char path[PATH_MAX];
-                       packname[45] = 0;
-                       snprintf(path, sizeof(path), "%s/pack/pack-%s.keep",
-                                get_object_directory(), packname + 5);
-                       pack_lockfile = xstrdup(path);
-               }
-
-               /* Then wrap our index-pack process. */
-               while (waitpid(pid, &status, 0) < 0)
-                       if (errno != EINTR)
-                               return "waitpid failed";
-               if (WIFEXITED(status)) {
-                       int code = WEXITSTATUS(status);
-                       if (code)
-                               return "index-pack exited with error code";
+               pack_lockfile = index_pack_lockfile(ip.out);
+               status = finish_command(&ip);
+               if (!status) {
                        reprepare_packed_git();
                        return NULL;
                }
@@ -493,7 +498,7 @@ int main(int argc, char **argv)
                        unlink(pack_lockfile);
                if (report_status)
                        report(unpack_status);
-               run_hook(post_receive_hook, commands, 0);
+               run_hook(post_receive_hook);
                run_update_post_hook(commands);
        }
        return 0;