+++ /dev/null
-git-clone-pack(1)
-=================
-
-NAME
-----
-git-clone-pack - Clones a repository by receiving packed objects
-
-
-SYNOPSIS
---------
-'git-clone-pack' [--exec=<git-upload-pack>] [<host>:]<directory> [<head>...]
-
-DESCRIPTION
------------
-Clones a repository into the current repository by invoking
-'git-upload-pack', possibly on the remote host via ssh, in
-the named repository, and stores the sent pack in the local
-repository.
-
-OPTIONS
--------
---exec=<git-upload-pack>::
- Use this to specify the path to 'git-upload-pack' on the
- remote side, if it is not found on your $PATH.
- Installations of sshd ignore the user's environment
- setup scripts for login shells (e.g. .bash_profile) and
- your privately installed git may not be found on the system
- default $PATH. Another workaround suggested is to set
- up your $PATH in ".bashrc", but this flag is for people
- who do not want to pay the overhead for non-interactive
- shells by having a lean .bashrc file (they set most of
- the things up in .bash_profile).
-
-<host>::
- A remote host that houses the repository. When this
- part is specified, 'git-upload-pack' is invoked via
- ssh.
-
-<directory>::
- The repository to sync from.
-
-<head>...::
- The heads to update. This is relative to $GIT_DIR
- (e.g. "HEAD", "refs/heads/master"). When unspecified,
- all heads are updated to match the remote repository.
-+
-Usually all the refs from existing repository are stored
-under the same name in the new repository. Giving explicit
-<head> arguments instead writes the object names and refs to
-the standard output, just like get-fetch-pack does.
-
-Author
-------
-Written by Linus Torvalds <torvalds@osdl.org>
-
-Documentation
---------------
-Documentation by Junio C Hamano.
-
-
-GIT
----
-Part of the gitlink:git[7] suite
-
+++ /dev/null
-#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 int quiet = 0;
-
-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", quiet);
- if (!quiet)
- fprintf(stderr, "\n");
-
- 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)) {
- quiet = 1;
- 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;
-}
projects / thirdparty / git.git / commitdiff
