#include "refs.h"
#include "pkt-line.h"
#include "run-command.h"
+#include "commit.h"
+#include "object.h"
static const char receive_pack_usage[] = "git-receive-pack <git-dir>";
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,
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)) {
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 (deny_non_fast_forwards && !is_null_sha1(old_sha1)) {
+ 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);
+ bases = get_merge_bases(old_commit, new_commit, 1);
+ for (ent = bases; ent; ent = ent->next)
+ if (!hashcmp(old_sha1, ent->item->object.sha1))
+ break;
+ free_commit_list(bases);
+ if (!ent)
+ return error("denying non-fast forward;"
+ " you should pull first");
}
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";
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);
+ setup_ident();
+ git_config(git_default_config);
+
write_head_info();
/* EOF */