test case for transitive info/alternates
[gitweb.git] / receive-pack.c
index 06857eb77fef93788f54d17cca68924f5213c9db..93929b5371bc0b9578ee5d3cb21c8ae6ade8cd1b 100644 (file)
@@ -6,25 +6,38 @@
 
 static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
 
-static const char unpacker[] = "git-unpack-objects";
+static const char *unpacker[] = { "unpack-objects", NULL };
+
+static int report_status = 0;
+
+static char capabilities[] = "report-status";
+static int capabilities_sent = 0;
 
 static int show_ref(const char *path, const unsigned char *sha1)
 {
-       packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
+       if (capabilities_sent)
+               packet_write(1, "%s %s\n", sha1_to_hex(sha1), path);
+       else
+               packet_write(1, "%s %s%c%s\n",
+                            sha1_to_hex(sha1), path, 0, capabilities);
+       capabilities_sent = 1;
        return 0;
 }
 
 static void write_head_info(void)
 {
        for_each_ref(show_ref);
+       if (!capabilities_sent)
+               show_ref("capabilities^{}", null_sha1);
+
 }
 
 struct command {
        struct command *next;
-       unsigned char updated;
+       const char *error_string;
        unsigned char old_sha1[20];
        unsigned char new_sha1[20];
-       char ref_name[0];
+       char ref_name[FLEX_ARRAY]; /* more */
 };
 
 static struct command *commands = NULL;
@@ -71,30 +84,38 @@ static int run_update_hook(const char *refname,
        case 0:
                return 0;
        case -ERR_RUN_COMMAND_FORK:
-               die("hook fork failed");
+               return error("hook fork failed");
        case -ERR_RUN_COMMAND_EXEC:
-               die("hook execute failed");
+               return error("hook execute failed");
        case -ERR_RUN_COMMAND_WAITPID:
-               die("waitpid failed");
+               return error("waitpid failed");
        case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
-               die("waitpid is confused");
+               return error("waitpid is confused");
        case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
-               fprintf(stderr, "%s died of signal", update_hook);
-               return -1;
+               return error("%s died of signal", update_hook);
        case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
-               die("%s died strangely", update_hook);
+               return error("%s died strangely", update_hook);
        default:
                error("%s exited with error code %d", update_hook, -code);
                return -code;
        }
 }
 
-static int update(const char *name,
-                 unsigned char *old_sha1, unsigned char *new_sha1)
+static int update(struct command *cmd)
 {
+       const char *name = cmd->ref_name;
+       unsigned char *old_sha1 = cmd->old_sha1;
+       unsigned char *new_sha1 = cmd->new_sha1;
        char new_hex[60], *old_hex, *lock_name;
        int newfd, namelen, written;
 
+       cmd->error_string = NULL;
+       if (!strncmp(name, "refs/", 5) && check_ref_format(name + 5)) {
+               cmd->error_string = "funny refname";
+               return error("refusing to create funny ref '%s' locally",
+                            name);
+       }
+
        namelen = strlen(name);
        lock_name = xmalloc(namelen + 10);
        memcpy(lock_name, name, namelen);
@@ -102,16 +123,19 @@ static int update(const char *name,
 
        strcpy(new_hex, sha1_to_hex(new_sha1));
        old_hex = sha1_to_hex(old_sha1);
-       if (!has_sha1_file(new_sha1))
+       if (!has_sha1_file(new_sha1)) {
+               cmd->error_string = "bad pack";
                return error("unpack should have generated %s, "
                             "but I can't find it!", new_hex);
-
+       }
        safe_create_leading_directories(lock_name);
 
        newfd = open(lock_name, O_CREAT | O_EXCL | O_WRONLY, 0666);
-       if (newfd < 0)
+       if (newfd < 0) {
+               cmd->error_string = "can't lock";
                return error("unable to create %s (%s)",
                             lock_name, strerror(errno));
+       }
 
        /* Write the ref with an ending '\n' */
        new_hex[40] = '\n';
@@ -123,18 +147,22 @@ static int update(const char *name,
        close(newfd);
        if (written != 41) {
                unlink(lock_name);
+               cmd->error_string = "can't write";
                return error("unable to write %s", lock_name);
        }
        if (verify_old_ref(name, old_hex) < 0) {
                unlink(lock_name);
+               cmd->error_string = "raced";
                return error("%s changed during push", name);
        }
        if (run_update_hook(name, old_hex, new_hex)) {
                unlink(lock_name);
-               return error("hook declined to update %s\n", name);
+               cmd->error_string = "hook declined";
+               return error("hook declined to update %s", name);
        }
        else if (rename(lock_name, name) < 0) {
                unlink(lock_name);
+               cmd->error_string = "can't rename";
                return error("unable to replace %s", name);
        }
        else {
@@ -149,12 +177,12 @@ static void run_update_post_hook(struct command *cmd)
 {
        struct command *cmd_p;
        int argc;
-       char **argv;
+       const char **argv;
 
        if (access(update_post_hook, X_OK) < 0)
                return;
        for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
-               if (!cmd_p->updated)
+               if (cmd_p->error_string)
                        continue;
                argc++;
        }
@@ -162,14 +190,16 @@ static void run_update_post_hook(struct command *cmd)
        argv[0] = update_post_hook;
 
        for (argc = 1, cmd_p = cmd; cmd_p; cmd_p = cmd_p->next) {
-               if (!cmd_p->updated)
+               char *p;
+               if (cmd_p->error_string)
                        continue;
-               argv[argc] = xmalloc(strlen(cmd_p->ref_name) + 1);
-               strcpy(argv[argc], cmd_p->ref_name);
+               p = xmalloc(strlen(cmd_p->ref_name) + 1);
+               strcpy(p, cmd_p->ref_name);
+               argv[argc] = p;
                argc++;
        }
        argv[argc] = NULL;
-       run_command_v(argc, argv);
+       run_command_v_opt(argc, argv, RUN_COMMAND_NO_STDIO);
 }
 
 /*
@@ -181,8 +211,7 @@ static void execute_commands(void)
        struct command *cmd = commands;
 
        while (cmd) {
-               cmd->updated = !update(cmd->ref_name,
-                                      cmd->old_sha1, cmd->new_sha1);
+               update(cmd);
                cmd = cmd->next;
        }
        run_update_post_hook(commands);
@@ -195,7 +224,8 @@ static void read_head_info(void)
                static char line[1000];
                unsigned char old_sha1[20], new_sha1[20];
                struct command *cmd;
-               int len;
+               char *refname;
+               int len, reflen;
 
                len = packet_read_line(0, line, sizeof(line));
                if (!len)
@@ -207,48 +237,76 @@ static void read_head_info(void)
                    line[81] != ' ' ||
                    get_sha1_hex(line, old_sha1) ||
                    get_sha1_hex(line + 41, new_sha1))
-                       die("protocol error: expected old/new/ref, got '%s'", line);
+                       die("protocol error: expected old/new/ref, got '%s'",
+                           line);
+
+               refname = line + 82;
+               reflen = strlen(refname);
+               if (reflen + 82 < len) {
+                       if (strstr(refname + reflen + 1, "report-status"))
+                               report_status = 1;
+               }
                cmd = xmalloc(sizeof(struct command) + len - 80);
                memcpy(cmd->old_sha1, old_sha1, 20);
                memcpy(cmd->new_sha1, new_sha1, 20);
                memcpy(cmd->ref_name, line + 82, len - 81);
+               cmd->error_string = "n/a (unpacker error)";
                cmd->next = NULL;
                *p = cmd;
                p = &cmd->next;
        }
 }
 
-static void unpack(void)
+static const char *unpack(int *error_code)
 {
-       int code = run_command(unpacker, NULL);
+       int code = run_command_v_opt(1, unpacker, RUN_GIT_CMD);
+
+       *error_code = 0;
        switch (code) {
        case 0:
-               return;
+               return NULL;
        case -ERR_RUN_COMMAND_FORK:
-               die("unpack fork failed");
+               return "unpack fork failed";
        case -ERR_RUN_COMMAND_EXEC:
-               die("unpack execute failed");
+               return "unpack execute failed";
        case -ERR_RUN_COMMAND_WAITPID:
-               die("waitpid failed");
+               return "waitpid failed";
        case -ERR_RUN_COMMAND_WAITPID_WRONG_PID:
-               die("waitpid is confused");
+               return "waitpid is confused";
        case -ERR_RUN_COMMAND_WAITPID_SIGNAL:
-               die("%s died of signal", unpacker);
+               return "unpacker died of signal";
        case -ERR_RUN_COMMAND_WAITPID_NOEXIT:
-               die("%s died strangely", unpacker);
+               return "unpacker died strangely";
        default:
-               die("%s exited with error code %d", unpacker, -code);
+               *error_code = -code;
+               return "unpacker exited with error code";
        }
 }
 
+static void report(const char *unpack_status)
+{
+       struct command *cmd;
+       packet_write(1, "unpack %s\n",
+                    unpack_status ? unpack_status : "ok");
+       for (cmd = commands; cmd; cmd = cmd->next) {
+               if (!cmd->error_string)
+                       packet_write(1, "ok %s\n",
+                                    cmd->ref_name);
+               else
+                       packet_write(1, "ng %s %s\n",
+                                    cmd->ref_name, cmd->error_string);
+       }
+       packet_flush(1);
+}
+
 int main(int argc, char **argv)
 {
        int i;
-       const char *dir = NULL;
+       char *dir = NULL;
 
        argv++;
        for (i = 1; i < argc; i++) {
-               const char *arg = *argv++;
+               char *arg = *argv++;
 
                if (*arg == '-') {
                        /* Do flag handling here */
@@ -261,18 +319,9 @@ int main(int argc, char **argv)
        if (!dir)
                usage(receive_pack_usage);
 
-       /* chdir to the directory. If that fails, try appending ".git" */
-       if (chdir(dir) < 0) {
-               if (chdir(mkpath("%s.git", dir)) < 0)
-                       die("unable to cd to %s", dir);
-       }
-
-       /* If we have a ".git" directory, chdir to it */
-       chdir(".git");
-       putenv("GIT_DIR=.");
+       if(!enter_repo(dir, 0))
+               die("'%s': unable to chdir or not a git archive", dir);
 
-       if (access("objects", X_OK) < 0 || access("refs/heads", X_OK) < 0)
-               die("%s doesn't appear to be a git directory", dir);
        write_head_info();
 
        /* EOF */
@@ -280,8 +329,12 @@ int main(int argc, char **argv)
 
        read_head_info();
        if (commands) {
-               unpack();
-               execute_commands();
+               int code;
+               const char *unpack_status = unpack(&code);
+               if (!unpack_status)
+                       execute_commands();
+               if (report_status)
+                       report(unpack_status);
        }
        return 0;
 }