Teach receive-pack about ref-log

This converts receive-pack to use the standard ref locking code
instead of its own.  As a side effect, it automatically records
the "push" event to ref-log if enabled.

Signed-off-by: Junio C Hamano <junkio@cox.net>

diff --git a/receive-pack.c b/receive-pack.c
index abbcb6af0b61ba5d31db878ccd78e5d7c9c64971..f0b4cb47c78434a27faaedaeac030d9ce1187edd 100644 (file)
--- a/receive-pack.c
+++ b/receive-pack.c
@@ -41,34 +41,6 @@ struct command {
 
 static struct command *commands;
 
-static int is_all_zeroes(const char *hex)
-{
-       int i;
-       for (i = 0; i < 40; i++)
-               if (*hex++ != '0')
-                       return 0;
-       return 1;
-}
-
-static int verify_old_ref(const char *name, char *hex_contents)
-{
-       int fd, ret;
-       char buffer[60];
-
-       if (is_all_zeroes(hex_contents))
-               return 0;
-       fd = open(name, O_RDONLY);
-       if (fd < 0)
-               return -1;
-       ret = read(fd, buffer, 40);
-       close(fd);
-       if (ret != 40)
-               return -1;
-       if (memcmp(buffer, hex_contents, 40))
-               return -1;
-       return 0;
-}
-
 static char update_hook[] = "hooks/update";
 
 static int run_update_hook(const char *refname,
@@ -105,8 +77,8 @@ 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;
+       char new_hex[41], old_hex[41];
+       struct ref_lock *lock;
 
        cmd->error_string = NULL;
        if (!strncmp(name, "refs/", 5) && check_ref_format(name + 5)) {
@@ -115,59 +87,27 @@ static int update(struct command *cmd)
                             name);
        }
 
-       namelen = strlen(name);
-       lock_name = xmalloc(namelen + 10);
-       memcpy(lock_name, name, namelen);
-       memcpy(lock_name + namelen, ".lock", 6);
-
        strcpy(new_hex, sha1_to_hex(new_sha1));
-       old_hex = sha1_to_hex(old_sha1);
+       strcpy(old_hex, sha1_to_hex(old_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) {
-               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';
-       new_hex[41] = 0;
-       written = write(newfd, new_hex, 41);
-       /* Remove the '\n' again */
-       new_hex[40] = 0;
-
-       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);
                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 {
-               fprintf(stderr, "%s: %s -> %s\n", name, old_hex, new_hex);
-               return 0;
+
+       lock = lock_any_ref_for_update(name, old_sha1);
+       if (!lock) {
+               cmd->error_string = "failed to lock";
+               return error("failed to lock %s", name);
        }
+       write_ref_sha1(lock, new_sha1, "push");
+
+       fprintf(stderr, "%s: %s -> %s\n", name, old_hex, new_hex);
+       return 0;
 }
 
 static char update_post_hook[] = "hooks/post-update";
@@ -318,9 +258,11 @@ int main(int argc, char **argv)
        if (!dir)
                usage(receive_pack_usage);
 
-       if(!enter_repo(dir, 0))
+       if (!enter_repo(dir, 0))
                die("'%s': unable to chdir or not a git archive", dir);
 
+       git_config(git_default_config);
+
        write_head_info();
 
        /* EOF */