| #include "cache.h" |
| #include "refs.h" |
| #include "pkt-line.h" |
| |
| static const char clone_pack_usage[] = |
| "git-clone-pack [--exec=<git-upload-pack>] [<host>:]<directory> [<heads>]*"; |
| static const char *exec = "git-upload-pack"; |
| |
| static void clone_handshake(int fd[2], struct ref *ref) |
| { |
| unsigned char sha1[20]; |
| |
| while (ref) { |
| packet_write(fd[1], "want %s\n", sha1_to_hex(ref->old_sha1)); |
| ref = ref->next; |
| } |
| packet_flush(fd[1]); |
| |
| /* We don't have nuttin' */ |
| packet_write(fd[1], "done\n"); |
| if (get_ack(fd[0], sha1)) |
| error("Huh! git-clone-pack got positive ack for %s", sha1_to_hex(sha1)); |
| } |
| |
| static int is_master(struct ref *ref) |
| { |
| return !strcmp(ref->name, "refs/heads/master"); |
| } |
| |
| static void write_one_ref(struct ref *ref) |
| { |
| char *path = git_path("%s", ref->name); |
| int fd; |
| char *hex; |
| |
| if (!strncmp(ref->name, "refs/", 5) && |
| check_ref_format(ref->name + 5)) { |
| error("refusing to create funny ref '%s' locally", ref->name); |
| return; |
| } |
| |
| if (safe_create_leading_directories(path)) |
| die("unable to create leading directory for %s", ref->name); |
| fd = open(path, O_CREAT | O_EXCL | O_WRONLY, 0666); |
| if (fd < 0) |
| die("unable to create ref %s", ref->name); |
| hex = sha1_to_hex(ref->old_sha1); |
| hex[40] = '\n'; |
| if (write(fd, hex, 41) != 41) |
| die("unable to write ref %s", ref->name); |
| close(fd); |
| } |
| |
| static void write_refs(struct ref *ref) |
| { |
| struct ref *head = NULL, *head_ptr, *master_ref; |
| char *head_path; |
| |
| /* Upload-pack must report HEAD first */ |
| if (!strcmp(ref->name, "HEAD")) { |
| head = ref; |
| ref = ref->next; |
| } |
| head_ptr = NULL; |
| master_ref = NULL; |
| while (ref) { |
| if (is_master(ref)) |
| master_ref = ref; |
| if (head && |
| !memcmp(ref->old_sha1, head->old_sha1, 20) && |
| !strncmp(ref->name, "refs/heads/",11) && |
| (!head_ptr || ref == master_ref)) |
| head_ptr = ref; |
| |
| write_one_ref(ref); |
| ref = ref->next; |
| } |
| if (!head) { |
| fprintf(stderr, "No HEAD in remote.\n"); |
| return; |
| } |
| |
| head_path = strdup(git_path("HEAD")); |
| if (!head_ptr) { |
| /* |
| * If we had a master ref, and it wasn't HEAD, we need to undo the |
| * symlink, and write a standalone HEAD. Give a warning, because that's |
| * really really wrong. |
| */ |
| if (master_ref) { |
| error("HEAD doesn't point to any refs! Making standalone HEAD"); |
| unlink(head_path); |
| } |
| write_one_ref(head); |
| free(head_path); |
| return; |
| } |
| |
| /* We reset to the master branch if it's available */ |
| if (master_ref) |
| return; |
| |
| fprintf(stderr, "Setting HEAD to %s\n", head_ptr->name); |
| |
| /* |
| * Uhhuh. Other end didn't have master. We start HEAD off with |
| * the first branch with the same value. |
| */ |
| if (create_symref(head_path, head_ptr->name) < 0) |
| die("unable to link HEAD to %s", head_ptr->name); |
| free(head_path); |
| } |
| |
| static int clone_pack(int fd[2], int nr_match, char **match) |
| { |
| struct ref *refs; |
| int status; |
| |
| get_remote_heads(fd[0], &refs, nr_match, match, 1); |
| if (!refs) { |
| packet_flush(fd[1]); |
| die("no matching remote head"); |
| } |
| clone_handshake(fd, refs); |
| |
| status = receive_keep_pack(fd, "git-clone-pack"); |
| |
| if (!status) { |
| if (nr_match == 0) |
| write_refs(refs); |
| else |
| while (refs) { |
| printf("%s %s\n", |
| sha1_to_hex(refs->old_sha1), |
| refs->name); |
| refs = refs->next; |
| } |
| } |
| return status; |
| } |
| |
| int main(int argc, char **argv) |
| { |
| int i, ret, nr_heads; |
| char *dest = NULL, **heads; |
| int fd[2]; |
| pid_t pid; |
| |
| setup_git_directory(); |
| |
| nr_heads = 0; |
| heads = NULL; |
| for (i = 1; i < argc; i++) { |
| char *arg = argv[i]; |
| |
| if (*arg == '-') { |
| if (!strcmp("-q", arg)) |
| continue; |
| if (!strncmp("--exec=", arg, 7)) { |
| exec = arg + 7; |
| continue; |
| } |
| usage(clone_pack_usage); |
| } |
| dest = arg; |
| heads = argv + i + 1; |
| nr_heads = argc - i - 1; |
| break; |
| } |
| if (!dest) |
| usage(clone_pack_usage); |
| pid = git_connect(fd, dest, exec); |
| if (pid < 0) |
| return 1; |
| ret = clone_pack(fd, nr_heads, heads); |
| close(fd[0]); |
| close(fd[1]); |
| finish_connect(pid); |
| return ret; |
| } |