clone-pack.c

#include "cache.h"
#include "refs.h"
#include "pkt-line.h"
#include <sys/wait.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 &&