예제 #1
0
static void find_non_local_tags(struct transport *transport,
			struct ref **head,
			struct ref ***tail)
{
	struct string_list existing_refs = { NULL, 0, 0, 0 };
	struct string_list new_refs = { NULL, 0, 0, 1 };
	char *ref_name;
	int ref_name_len;
	const unsigned char *ref_sha1;
	const struct ref *tag_ref;
	struct ref *rm = NULL;
	const struct ref *ref;

	for_each_ref(add_existing, &existing_refs);
	for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
		if (prefixcmp(ref->name, "refs/tags"))
			continue;

		ref_name = xstrdup(ref->name);
		ref_name_len = strlen(ref_name);
		ref_sha1 = ref->old_sha1;

		if (!strcmp(ref_name + ref_name_len - 3, "^{}")) {
			ref_name[ref_name_len - 3] = 0;
			tag_ref = transport_get_remote_refs(transport);
			while (tag_ref) {
				if (!strcmp(tag_ref->name, ref_name)) {
					ref_sha1 = tag_ref->old_sha1;
					break;
				}
				tag_ref = tag_ref->next;
			}
		}

		if (!string_list_has_string(&existing_refs, ref_name) &&
		    !string_list_has_string(&new_refs, ref_name) &&
		    (has_sha1_file(ref->old_sha1) ||
		     will_fetch(head, ref->old_sha1))) {
			string_list_insert(ref_name, &new_refs);

			rm = alloc_ref(ref_name);
			rm->peer_ref = alloc_ref(ref_name);
			hashcpy(rm->old_sha1, ref_sha1);

			**tail = rm;
			*tail = &rm->next;
		}
		free(ref_name);
	}
	string_list_clear(&existing_refs, 0);
	string_list_clear(&new_refs, 0);
}
예제 #2
0
파일: builtin-clone.c 프로젝트: astubbs/git
static void setup_reference(const char *repo)
{
	const char *ref_git;
	char *ref_git_copy;

	struct remote *remote;
	struct transport *transport;
	const struct ref *extra;

	ref_git = make_absolute_path(option_reference);

	if (is_directory(mkpath("%s/.git/objects", ref_git)))
		ref_git = mkpath("%s/.git", ref_git);
	else if (!is_directory(mkpath("%s/objects", ref_git)))
		die("reference repository '%s' is not a local directory.",
		    option_reference);

	ref_git_copy = xstrdup(ref_git);

	add_to_alternates_file(ref_git_copy);

	remote = remote_get(ref_git_copy);
	transport = transport_get(remote, ref_git_copy);
	for (extra = transport_get_remote_refs(transport); extra;
	     extra = extra->next)
		add_extra_ref(extra->name, extra->old_sha1, 0);

	transport_disconnect(transport);

	free(ref_git_copy);
}
예제 #3
0
파일: transport.c 프로젝트: ruoso/git
static int refs_from_alternate_cb(struct alternate_object_database *e,
				  void *data)
{
	char *other;
	size_t len;
	struct remote *remote;
	struct transport *transport;
	const struct ref *extra;
	struct alternate_refs_data *cb = data;

	e->name[-1] = '\0';
	other = xstrdup(real_path(e->base));
	e->name[-1] = '/';
	len = strlen(other);

	while (other[len-1] == '/')
		other[--len] = '\0';
	if (len < 8 || memcmp(other + len - 8, "/objects", 8))
		return 0;
	/* Is this a git repository with refs? */
	memcpy(other + len - 8, "/refs", 6);
	if (!is_directory(other))
		return 0;
	other[len - 8] = '\0';
	remote = remote_get(other);
	transport = transport_get(remote, other);
	for (extra = transport_get_remote_refs(transport);
	     extra;
	     extra = extra->next)
		cb->fn(extra, cb->data);
	transport_disconnect(transport);
	free(other);
	return 0;
}
예제 #4
0
static int add_refs_from_alternate(struct alternate_object_database *e, void *unused)
{
	char *other;
	size_t len;
	struct remote *remote;
	struct transport *transport;
	const struct ref *extra;

	e->name[-1] = '\0';
	other = xstrdup(make_absolute_path(e->base));
	e->name[-1] = '/';
	len = strlen(other);

	while (other[len-1] == '/')
		other[--len] = '\0';
	if (len < 8 || memcmp(other + len - 8, "/objects", 8))
		return 0;
	/* Is this a git repository with refs? */
	memcpy(other + len - 8, "/refs", 6);
	if (!is_directory(other))
		return 0;
	other[len - 8] = '\0';
	remote = remote_get(other);
	transport = transport_get(remote, other);
	for (extra = transport_get_remote_refs(transport);
	     extra;
	     extra = extra->next) {
		add_extra_ref(".have", extra->old_sha1, 0);
	}
	transport_disconnect(transport);
	free(other);
	return 0;
}
예제 #5
0
static const struct ref *clone_local(const char *src_repo,
				     const char *dest_repo)
{
	const struct ref *ret;
	struct remote *remote;
	struct transport *transport;

	if (option_shared) {
		struct strbuf alt = STRBUF_INIT;
		strbuf_addf(&alt, "%s/objects", src_repo);
		add_to_alternates_file(alt.buf);
		strbuf_release(&alt);
	} else {
		struct strbuf src = STRBUF_INIT;
		struct strbuf dest = STRBUF_INIT;
		strbuf_addf(&src, "%s/objects", src_repo);
		strbuf_addf(&dest, "%s/objects", dest_repo);
		copy_or_link_directory(&src, &dest, src_repo, src.len);
		strbuf_release(&src);
		strbuf_release(&dest);
	}

	remote = remote_get(src_repo);
	transport = transport_get(remote, src_repo);
	ret = transport_get_remote_refs(transport);
	transport_disconnect(transport);
	if (0 <= option_verbosity)
		printf(_("done.\n"));
	return ret;
}
예제 #6
0
static int add_one_reference(struct string_list_item *item, void *cb_data)
{
	char *ref_git;
	struct strbuf alternate = STRBUF_INIT;
	struct remote *remote;
	struct transport *transport;
	const struct ref *extra;

	/* Beware: real_path() and mkpath() return static buffer */
	ref_git = xstrdup(real_path(item->string));
	if (is_directory(mkpath("%s/.git/objects", ref_git))) {
		char *ref_git_git = xstrdup(mkpath("%s/.git", ref_git));
		free(ref_git);
		ref_git = ref_git_git;
	} else if (!is_directory(mkpath("%s/objects", ref_git)))
		die(_("reference repository '%s' is not a local directory."),
		    item->string);

	strbuf_addf(&alternate, "%s/objects", ref_git);
	add_to_alternates_file(alternate.buf);
	strbuf_release(&alternate);

	remote = remote_get(ref_git);
	transport = transport_get(remote, ref_git);
	for (extra = transport_get_remote_refs(transport); extra;
	     extra = extra->next)
		add_extra_ref(extra->name, extra->old_sha1, 0);

	transport_disconnect(transport);
	free(ref_git);
	return 0;
}
예제 #7
0
파일: builtin-clone.c 프로젝트: astubbs/git
static const struct ref *clone_local(const char *src_repo,
				     const char *dest_repo)
{
	const struct ref *ret;
	struct strbuf src = STRBUF_INIT;
	struct strbuf dest = STRBUF_INIT;
	struct remote *remote;
	struct transport *transport;

	if (option_shared)
		add_to_alternates_file(src_repo);
	else {
		strbuf_addf(&src, "%s/objects", src_repo);
		strbuf_addf(&dest, "%s/objects", dest_repo);
		copy_or_link_directory(&src, &dest);
		strbuf_release(&src);
		strbuf_release(&dest);
	}

	remote = remote_get(src_repo);
	transport = transport_get(remote, src_repo);
	ret = transport_get_remote_refs(transport);
	transport_disconnect(transport);
	return ret;
}
예제 #8
0
파일: fetch.c 프로젝트: davvid/git
static struct ref *get_ref_map(struct transport *transport,
			       struct refspec *refs, int ref_count, int tags,
			       int *autotags)
{
	int i;
	struct ref *rm;
	struct ref *ref_map = NULL;
	struct ref **tail = &ref_map;

	const struct ref *remote_refs = transport_get_remote_refs(transport);

	if (ref_count || tags == TAGS_SET) {
		for (i = 0; i < ref_count; i++) {
			get_fetch_map(remote_refs, &refs[i], &tail, 0);
			if (refs[i].dst && refs[i].dst[0])
				*autotags = 1;
		}
		/* Merge everything on the command line, but not --tags */
		for (rm = ref_map; rm; rm = rm->next)
			rm->merge = 1;
		if (tags == TAGS_SET)
			get_fetch_map(remote_refs, tag_refspec, &tail, 0);
	} else {
		/* Use the defaults */
		struct remote *remote = transport->remote;
		struct branch *branch = branch_get(NULL);
		int has_merge = branch_has_merge_config(branch);
		if (remote && (remote->fetch_refspec_nr || has_merge)) {
			for (i = 0; i < remote->fetch_refspec_nr; i++) {
				get_fetch_map(remote_refs, &remote->fetch[i], &tail, 0);
				if (remote->fetch[i].dst &&
				    remote->fetch[i].dst[0])
					*autotags = 1;
				if (!i && !has_merge && ref_map &&
				    !remote->fetch[0].pattern)
					ref_map->merge = 1;
			}
			/*
			 * if the remote we're fetching from is the same
			 * as given in branch.<name>.remote, we add the
			 * ref given in branch.<name>.merge, too.
			 */
			if (has_merge &&
			    !strcmp(branch->remote_name, remote->name))
				add_merge_config(&ref_map, remote_refs, branch, &tail);
		} else {
			ref_map = get_remote_ref(remote_refs, "HEAD");
			if (!ref_map)
				die("Couldn't find remote ref HEAD");
			ref_map->merge = 1;
			tail = &ref_map->next;
		}
	}
	if (tags == TAGS_DEFAULT && *autotags)
		find_non_local_tags(transport, &ref_map, &tail);
	ref_remove_duplicates(ref_map);

	return ref_map;
}
예제 #9
0
int transport_fetch_refs(struct transport *transport, struct ref *refs)
{
	int rc;
	int nr_heads = 0, nr_alloc = 0, nr_refs = 0;
	struct ref **heads = NULL;
	struct ref *rm;

	if (!transport->vtable->fetch_without_list)
		/*
		 * Some transports (e.g. the built-in bundle transport and the
		 * transport helper interface) do not work when fetching is
		 * done immediately after transport creation. List the remote
		 * refs anyway (if not already listed) as a workaround.
		 */
		transport_get_remote_refs(transport, NULL);

	for (rm = refs; rm; rm = rm->next) {
		nr_refs++;
		if (rm->peer_ref &&
		    !is_null_oid(&rm->old_oid) &&
		    oideq(&rm->peer_ref->old_oid, &rm->old_oid))
			continue;
		ALLOC_GROW(heads, nr_heads + 1, nr_alloc);
		heads[nr_heads++] = rm;
	}

	if (!nr_heads) {
		/*
		 * When deepening of a shallow repository is requested,
		 * then local and remote refs are likely to still be equal.
		 * Just feed them all to the fetch method in that case.
		 * This condition shouldn't be met in a non-deepening fetch
		 * (see builtin/fetch.c:quickfetch()).
		 */
		ALLOC_ARRAY(heads, nr_refs);
		for (rm = refs; rm; rm = rm->next)
			heads[nr_heads++] = rm;
	}

	rc = transport->vtable->fetch(transport, nr_heads, heads);

	free(heads);
	return rc;
}
예제 #10
0
파일: builtin-clone.c 프로젝트: Inkdit/git
static const struct ref *clone_local(const char *src_repo,
				     const char *dest_repo)
{
	const struct ref *ret;
	char src[PATH_MAX];
	char dest[PATH_MAX];
	struct remote *remote;
	struct transport *transport;

	if (option_shared)
		add_to_alternates_file(src_repo);
	else {
		snprintf(src, PATH_MAX, "%s/objects", src_repo);
		snprintf(dest, PATH_MAX, "%s/objects", dest_repo);
		copy_or_link_directory(src, dest);
	}

	remote = remote_get(src_repo);
	transport = transport_get(remote, src_repo);
	ret = transport_get_remote_refs(transport);
	transport_disconnect(transport);
	return ret;
}
예제 #11
0
int cmd_ls_remote(int argc, const char **argv, const char *prefix)
{
	int i;
	const char *dest = NULL;
	int nongit;
	unsigned flags = 0;
	const char *uploadpack = NULL;
	const char **pattern = NULL;

	struct remote *remote;
	struct transport *transport;
	const struct ref *ref;

	setup_git_directory_gently(&nongit);

	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];

		if (*arg == '-') {
			if (!prefixcmp(arg, "--upload-pack=")) {
				uploadpack = arg + 14;
				continue;
			}
			if (!prefixcmp(arg, "--exec=")) {
				uploadpack = arg + 7;
				continue;
			}
			if (!strcmp("--tags", arg) || !strcmp("-t", arg)) {
				flags |= REF_TAGS;
				continue;
			}
			if (!strcmp("--heads", arg) || !strcmp("-h", arg)) {
				flags |= REF_HEADS;
				continue;
			}
			if (!strcmp("--refs", arg)) {
				flags |= REF_NORMAL;
				continue;
			}
			usage(ls_remote_usage);
		}
		dest = arg;
		i++;
		break;
	}

	if (!dest)
		usage(ls_remote_usage);

	if (argv[i]) {
		int j;
		pattern = xcalloc(sizeof(const char *), argc - i + 1);
		for (j = i; j < argc; j++) {
			int len = strlen(argv[j]);
			char *p = xmalloc(len + 3);
			sprintf(p, "*/%s", argv[j]);
			pattern[j - i] = p;
		}
	}
	remote = nongit ? NULL : remote_get(dest);
	if (remote && !remote->url_nr)
		die("remote %s has no configured URL", dest);
	transport = transport_get(remote, remote ? remote->url[0] : dest);
	if (uploadpack != NULL)
		transport_set_option(transport, TRANS_OPT_UPLOADPACK, uploadpack);

	ref = transport_get_remote_refs(transport);
	if (transport_disconnect(transport))
		return 1;
	for ( ; ref; ref = ref->next) {
		if (!check_ref_type(ref, flags))
			continue;
		if (!tail_match(pattern, ref->name))
			continue;
		printf("%s	%s\n", sha1_to_hex(ref->old_sha1), ref->name);
	}
	return 0;
}
예제 #12
0
파일: ls-remote.c 프로젝트: DoWonJin/git
int cmd_ls_remote(int argc, const char **argv, const char *prefix)
{
	const char *dest = NULL;
	unsigned flags = 0;
	int get_url = 0;
	int quiet = 0;
	int status = 0;
	int show_symref_target = 0;
	const char *uploadpack = NULL;
	const char **pattern = NULL;
	struct argv_array ref_prefixes = ARGV_ARRAY_INIT;
	int i;

	struct remote *remote;
	struct transport *transport;
	const struct ref *ref;
	struct ref_array ref_array;
	static struct ref_sorting *sorting = NULL, **sorting_tail = &sorting;

	struct option options[] = {
		OPT__QUIET(&quiet, N_("do not print remote URL")),
		OPT_STRING(0, "upload-pack", &uploadpack, N_("exec"),
			   N_("path of git-upload-pack on the remote host")),
		{ OPTION_STRING, 0, "exec", &uploadpack, N_("exec"),
			   N_("path of git-upload-pack on the remote host"),
			   PARSE_OPT_HIDDEN },
		OPT_BIT('t', "tags", &flags, N_("limit to tags"), REF_TAGS),
		OPT_BIT('h', "heads", &flags, N_("limit to heads"), REF_HEADS),
		OPT_BIT(0, "refs", &flags, N_("do not show peeled tags"), REF_NORMAL),
		OPT_BOOL(0, "get-url", &get_url,
			 N_("take url.<base>.insteadOf into account")),
		OPT_CALLBACK(0 , "sort", sorting_tail, N_("key"),
			     N_("field name to sort on"), &parse_opt_ref_sorting),
		OPT_SET_INT_F(0, "exit-code", &status,
			      N_("exit with exit code 2 if no matching refs are found"),
			      2, PARSE_OPT_NOCOMPLETE),
		OPT_BOOL(0, "symref", &show_symref_target,
			 N_("show underlying ref in addition to the object pointed by it")),
		OPT_END()
	};

	memset(&ref_array, 0, sizeof(ref_array));

	argc = parse_options(argc, argv, prefix, options, ls_remote_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);
	dest = argv[0];

	if (argc > 1) {
		int i;
		pattern = xcalloc(argc, sizeof(const char *));
		for (i = 1; i < argc; i++) {
			const char *glob;
			pattern[i - 1] = xstrfmt("*/%s", argv[i]);

			glob = strchr(argv[i], '*');
			if (glob)
				argv_array_pushf(&ref_prefixes, "%.*s",
						 (int)(glob - argv[i]), argv[i]);
			else
				expand_ref_prefix(&ref_prefixes, argv[i]);
		}
	}

	remote = remote_get(dest);
	if (!remote) {
		if (dest)
			die("bad repository '%s'", dest);
		die("No remote configured to list refs from.");
	}
	if (!remote->url_nr)
		die("remote %s has no configured URL", dest);

	if (get_url) {
		printf("%s\n", *remote->url);
		UNLEAK(sorting);
		return 0;
	}

	transport = transport_get(remote, NULL);
	if (uploadpack != NULL)
		transport_set_option(transport, TRANS_OPT_UPLOADPACK, uploadpack);

	ref = transport_get_remote_refs(transport, &ref_prefixes);
	if (transport_disconnect(transport)) {
		UNLEAK(sorting);
		return 1;
	}

	if (!dest && !quiet)
		fprintf(stderr, "From %s\n", *remote->url);
	for ( ; ref; ref = ref->next) {
		struct ref_array_item *item;
		if (!check_ref_type(ref, flags))
			continue;
		if (!tail_match(pattern, ref->name))
			continue;
		item = ref_array_push(&ref_array, ref->name, &ref->old_oid);
		item->symref = xstrdup_or_null(ref->symref);
	}

	if (sorting)
		ref_array_sort(sorting, &ref_array);

	for (i = 0; i < ref_array.nr; i++) {
		const struct ref_array_item *ref = ref_array.items[i];
		if (show_symref_target && ref->symref)
			printf("ref: %s\t%s\n", ref->symref, ref->refname);
		printf("%s\t%s\n", oid_to_hex(&ref->objectname), ref->refname);
		status = 0; /* we found something */
	}

	UNLEAK(sorting);
	UNLEAK(ref_array);
	return status;
}
예제 #13
0
파일: clone.c 프로젝트: IAmAnubhavSaini/git
int cmd_clone(int argc, const char **argv, const char *prefix)
{
	int is_bundle = 0, is_local;
	struct stat buf;
	const char *repo_name, *repo, *work_tree, *git_dir;
	char *path, *dir;
	int dest_exists;
	const struct ref *refs, *remote_head;
	const struct ref *remote_head_points_at;
	const struct ref *our_head_points_at;
	struct ref *mapped_refs;
	const struct ref *ref;
	struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
	struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
	struct transport *transport = NULL;
	const char *src_ref_prefix = "refs/heads/";
	struct remote *remote;
	int err = 0, complete_refs_before_fetch = 1;

	struct refspec *refspec;
	const char *fetch_pattern;

	packet_trace_identity("clone");
	argc = parse_options(argc, argv, prefix, builtin_clone_options,
			     builtin_clone_usage, 0);

	if (argc > 2)
		usage_msg_opt(_("Too many arguments."),
			builtin_clone_usage, builtin_clone_options);

	if (argc == 0)
		usage_msg_opt(_("You must specify a repository to clone."),
			builtin_clone_usage, builtin_clone_options);

	if (option_single_branch == -1)
		option_single_branch = option_depth ? 1 : 0;

	if (option_mirror)
		option_bare = 1;

	if (option_bare) {
		if (option_origin)
			die(_("--bare and --origin %s options are incompatible."),
			    option_origin);
		if (real_git_dir)
			die(_("--bare and --separate-git-dir are incompatible."));
		option_no_checkout = 1;
	}

	if (!option_origin)
		option_origin = "origin";

	repo_name = argv[0];

	path = get_repo_path(repo_name, &is_bundle);
	if (path)
		repo = xstrdup(absolute_path(repo_name));
	else if (!strchr(repo_name, ':'))
		die(_("repository '%s' does not exist"), repo_name);
	else
		repo = repo_name;

	/* no need to be strict, transport_set_option() will validate it again */
	if (option_depth && atoi(option_depth) < 1)
		die(_("depth %s is not a positive number"), option_depth);

	if (argc == 2)
		dir = xstrdup(argv[1]);
	else
		dir = guess_dir_name(repo_name, is_bundle, option_bare);
	strip_trailing_slashes(dir);

	dest_exists = !stat(dir, &buf);
	if (dest_exists && !is_empty_dir(dir))
		die(_("destination path '%s' already exists and is not "
			"an empty directory."), dir);

	strbuf_addf(&reflog_msg, "clone: from %s", repo);

	if (option_bare)
		work_tree = NULL;
	else {
		work_tree = getenv("GIT_WORK_TREE");
		if (work_tree && !stat(work_tree, &buf))
			die(_("working tree '%s' already exists."), work_tree);
	}

	if (option_bare || work_tree)
		git_dir = xstrdup(dir);
	else {
		work_tree = dir;
		git_dir = mkpathdup("%s/.git", dir);
	}

	if (!option_bare) {
		junk_work_tree = work_tree;
		if (safe_create_leading_directories_const(work_tree) < 0)
			die_errno(_("could not create leading directories of '%s'"),
				  work_tree);
		if (!dest_exists && mkdir(work_tree, 0777))
			die_errno(_("could not create work tree dir '%s'."),
				  work_tree);
		set_git_work_tree(work_tree);
	}
	junk_git_dir = git_dir;
	atexit(remove_junk);
	sigchain_push_common(remove_junk_on_signal);

	if (safe_create_leading_directories_const(git_dir) < 0)
		die(_("could not create leading directories of '%s'"), git_dir);

	set_git_dir_init(git_dir, real_git_dir, 0);
	if (real_git_dir) {
		git_dir = real_git_dir;
		junk_git_dir = real_git_dir;
	}

	if (0 <= option_verbosity) {
		if (option_bare)
			fprintf(stderr, _("Cloning into bare repository '%s'...\n"), dir);
		else
			fprintf(stderr, _("Cloning into '%s'...\n"), dir);
	}
	init_db(option_template, INIT_DB_QUIET);
	write_config(&option_config);

	git_config(git_default_config, NULL);

	if (option_bare) {
		if (option_mirror)
			src_ref_prefix = "refs/";
		strbuf_addstr(&branch_top, src_ref_prefix);

		git_config_set("core.bare", "true");
	} else {
		strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
	}

	strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);
	strbuf_addf(&key, "remote.%s.url", option_origin);
	git_config_set(key.buf, repo);
	strbuf_reset(&key);

	if (option_reference.nr)
		setup_reference();
	else if (option_dissociate) {
		warning(_("--dissociate given, but there is no --reference"));
		option_dissociate = 0;
	}

	fetch_pattern = value.buf;
	refspec = parse_fetch_refspec(1, &fetch_pattern);

	strbuf_reset(&value);

	remote = remote_get(option_origin);
	transport = transport_get(remote, remote->url[0]);
	path = get_repo_path(remote->url[0], &is_bundle);
	is_local = option_local != 0 && path && !is_bundle;
	if (is_local) {
		if (option_depth)
			warning(_("--depth is ignored in local clones; use file:// instead."));
		if (!access(mkpath("%s/shallow", path), F_OK)) {
			if (option_local > 0)
				warning(_("source repository is shallow, ignoring --local"));
			is_local = 0;
		}
	}
	if (option_local > 0 && !is_local)
		warning(_("--local is ignored"));
	transport->cloning = 1;

	if (!transport->get_refs_list || (!is_local && !transport->fetch))
		die(_("Don't know how to clone %s"), transport->url);

	transport_set_option(transport, TRANS_OPT_KEEP, "yes");

	if (option_depth)
		transport_set_option(transport, TRANS_OPT_DEPTH,
				     option_depth);
	if (option_single_branch)
		transport_set_option(transport, TRANS_OPT_FOLLOWTAGS, "1");

	transport_set_verbosity(transport, option_verbosity, option_progress);

	if (option_upload_pack)
		transport_set_option(transport, TRANS_OPT_UPLOADPACK,
				     option_upload_pack);

	if (transport->smart_options && !option_depth)
		transport->smart_options->check_self_contained_and_connected = 1;

	refs = transport_get_remote_refs(transport);

	if (refs) {
		mapped_refs = wanted_peer_refs(refs, refspec);
		/*
		 * transport_get_remote_refs() may return refs with null sha-1
		 * in mapped_refs (see struct transport->get_refs_list
		 * comment). In that case we need fetch it early because
		 * remote_head code below relies on it.
		 *
		 * for normal clones, transport_get_remote_refs() should
		 * return reliable ref set, we can delay cloning until after
		 * remote HEAD check.
		 */
		for (ref = refs; ref; ref = ref->next)
			if (is_null_sha1(ref->old_sha1)) {
				complete_refs_before_fetch = 0;
				break;
			}

		if (!is_local && !complete_refs_before_fetch)
			transport_fetch_refs(transport, mapped_refs);

		remote_head = find_ref_by_name(refs, "HEAD");
		remote_head_points_at =
			guess_remote_head(remote_head, mapped_refs, 0);

		if (option_branch) {
			our_head_points_at =
				find_remote_branch(mapped_refs, option_branch);

			if (!our_head_points_at)
				die(_("Remote branch %s not found in upstream %s"),
				    option_branch, option_origin);
		}
		else
			our_head_points_at = remote_head_points_at;
	}
	else {
		if (option_branch)
			die(_("Remote branch %s not found in upstream %s"),
					option_branch, option_origin);

		warning(_("You appear to have cloned an empty repository."));
		mapped_refs = NULL;
		our_head_points_at = NULL;
		remote_head_points_at = NULL;
		remote_head = NULL;
		option_no_checkout = 1;
		if (!option_bare)
			install_branch_config(0, "master", option_origin,
					      "refs/heads/master");
	}

	write_refspec_config(src_ref_prefix, our_head_points_at,
			remote_head_points_at, &branch_top);

	if (is_local)
		clone_local(path, git_dir);
	else if (refs && complete_refs_before_fetch)
		transport_fetch_refs(transport, mapped_refs);

	update_remote_refs(refs, mapped_refs, remote_head_points_at,
			   branch_top.buf, reflog_msg.buf, transport, !is_local);

	update_head(our_head_points_at, remote_head, reflog_msg.buf);

	transport_unlock_pack(transport);
	transport_disconnect(transport);

	if (option_dissociate)
		dissociate_from_references();

	junk_mode = JUNK_LEAVE_REPO;
	err = checkout();

	strbuf_release(&reflog_msg);
	strbuf_release(&branch_top);
	strbuf_release(&key);
	strbuf_release(&value);
	junk_mode = JUNK_LEAVE_ALL;

	free(refspec);
	return err;
}
예제 #14
0
파일: ls-remote.c 프로젝트: avar/git
int cmd_ls_remote(int argc, const char **argv, const char *prefix)
{
	const char *dest = NULL;
	unsigned flags = 0;
	int get_url = 0;
	int quiet = 0;
	int status = 0;
	int show_symref_target = 0;
	const char *uploadpack = NULL;
	const char **pattern = NULL;

	struct remote *remote;
	struct transport *transport;
	const struct ref *ref;

	struct option options[] = {
		OPT__QUIET(&quiet, N_("do not print remote URL")),
		OPT_STRING(0, "upload-pack", &uploadpack, N_("exec"),
			   N_("path of git-upload-pack on the remote host")),
		{ OPTION_STRING, 0, "exec", &uploadpack, N_("exec"),
			   N_("path of git-upload-pack on the remote host"),
			   PARSE_OPT_HIDDEN },
		OPT_BIT('t', "tags", &flags, N_("limit to tags"), REF_TAGS),
		OPT_BIT('h', "heads", &flags, N_("limit to heads"), REF_HEADS),
		OPT_BIT(0, "refs", &flags, N_("do not show peeled tags"), REF_NORMAL),
		OPT_BOOL(0, "get-url", &get_url,
			 N_("take url.<base>.insteadOf into account")),
		OPT_SET_INT(0, "exit-code", &status,
			    N_("exit with exit code 2 if no matching refs are found"), 2),
		OPT_BOOL(0, "symref", &show_symref_target,
			 N_("show underlying ref in addition to the object pointed by it")),
		OPT_END()
	};

	argc = parse_options(argc, argv, prefix, options, ls_remote_usage,
			     PARSE_OPT_STOP_AT_NON_OPTION);
	dest = argv[0];

	if (argc > 1) {
		int i;
		pattern = xcalloc(argc, sizeof(const char *));
		for (i = 1; i < argc; i++)
			pattern[i - 1] = xstrfmt("*/%s", argv[i]);
	}

	remote = remote_get(dest);
	if (!remote) {
		if (dest)
			die("bad repository '%s'", dest);
		die("No remote configured to list refs from.");
	}
	if (!remote->url_nr)
		die("remote %s has no configured URL", dest);

	if (get_url) {
		printf("%s\n", *remote->url);
		return 0;
	}

	transport = transport_get(remote, NULL);
	if (uploadpack != NULL)
		transport_set_option(transport, TRANS_OPT_UPLOADPACK, uploadpack);

	ref = transport_get_remote_refs(transport);
	if (transport_disconnect(transport))
		return 1;

	if (!dest && !quiet)
		fprintf(stderr, "From %s\n", *remote->url);
	for ( ; ref; ref = ref->next) {
		if (!check_ref_type(ref, flags))
			continue;
		if (!tail_match(pattern, ref->name))
			continue;
		if (show_symref_target && ref->symref)
			printf("ref: %s\t%s\n", ref->symref, ref->name);
		printf("%s\t%s\n", oid_to_hex(&ref->old_oid), ref->name);
		status = 0; /* we found something */
	}
	return status;
}
예제 #15
0
파일: ls-remote.c 프로젝트: 7sOddities/git
int cmd_ls_remote(int argc, const char **argv, const char *prefix)
{
	int i;
	const char *dest = NULL;
	unsigned flags = 0;
	int get_url = 0;
	int quiet = 0;
	int status = 0;
	const char *uploadpack = NULL;
	const char **pattern = NULL;

	struct remote *remote;
	struct transport *transport;
	const struct ref *ref;

	if (argc == 2 && !strcmp("-h", argv[1]))
		usage(ls_remote_usage);

	for (i = 1; i < argc; i++) {
		const char *arg = argv[i];

		if (*arg == '-') {
			if (starts_with(arg, "--upload-pack=")) {
				uploadpack = arg + 14;
				continue;
			}
			if (starts_with(arg, "--exec=")) {
				uploadpack = arg + 7;
				continue;
			}
			if (!strcmp("--tags", arg) || !strcmp("-t", arg)) {
				flags |= REF_TAGS;
				continue;
			}
			if (!strcmp("--heads", arg) || !strcmp("-h", arg)) {
				flags |= REF_HEADS;
				continue;
			}
			if (!strcmp("--refs", arg)) {
				flags |= REF_NORMAL;
				continue;
			}
			if (!strcmp("--quiet", arg) || !strcmp("-q", arg)) {
				quiet = 1;
				continue;
			}
			if (!strcmp("--get-url", arg)) {
				get_url = 1;
				continue;
			}
			if (!strcmp("--exit-code", arg)) {
				/* return this code if no refs are reported */
				status = 2;
				continue;
			}
			usage(ls_remote_usage);
		}
		dest = arg;
		i++;
		break;
	}

	if (argv[i]) {
		int j;
		pattern = xcalloc(sizeof(const char *), argc - i + 1);
		for (j = i; j < argc; j++) {
			int len = strlen(argv[j]);
			char *p = xmalloc(len + 3);
			sprintf(p, "*/%s", argv[j]);
			pattern[j - i] = p;
		}
	}
	remote = remote_get(dest);
	if (!remote) {
		if (dest)
			die("bad repository '%s'", dest);
		die("No remote configured to list refs from.");
	}
	if (!remote->url_nr)
		die("remote %s has no configured URL", dest);

	if (get_url) {
		printf("%s\n", *remote->url);
		return 0;
	}

	transport = transport_get(remote, NULL);
	if (uploadpack != NULL)
		transport_set_option(transport, TRANS_OPT_UPLOADPACK, uploadpack);

	ref = transport_get_remote_refs(transport);
	if (transport_disconnect(transport))
		return 1;

	if (!dest && !quiet)
		fprintf(stderr, "From %s\n", *remote->url);
	for ( ; ref; ref = ref->next) {
		if (!check_ref_type(ref, flags))
			continue;
		if (!tail_match(pattern, ref->name))
			continue;
		printf("%s	%s\n", sha1_to_hex(ref->old_sha1), ref->name);
		status = 0; /* we found something */
	}
	return status;
}
예제 #16
0
파일: fetch.c 프로젝트: davvid/git
static void find_non_local_tags(struct transport *transport,
			struct ref **head,
			struct ref ***tail)
{
	struct string_list existing_refs = { NULL, 0, 0, 0 };
	struct string_list remote_refs = { NULL, 0, 0, 0 };
	struct tag_data data = {head, tail};
	const struct ref *ref;
	struct string_list_item *item = NULL;

	for_each_ref(add_existing, &existing_refs);
	for (ref = transport_get_remote_refs(transport); ref; ref = ref->next) {
		if (prefixcmp(ref->name, "refs/tags"))
			continue;

		/*
		 * The peeled ref always follows the matching base
		 * ref, so if we see a peeled ref that we don't want
		 * to fetch then we can mark the ref entry in the list
		 * as one to ignore by setting util to NULL.
		 */
		if (!suffixcmp(ref->name, "^{}")) {
			if (item && !has_sha1_file(ref->old_sha1) &&
			    !will_fetch(head, ref->old_sha1) &&
			    !has_sha1_file(item->util) &&
			    !will_fetch(head, item->util))
				item->util = NULL;
			item = NULL;
			continue;
		}

		/*
		 * If item is non-NULL here, then we previously saw a
		 * ref not followed by a peeled reference, so we need
		 * to check if it is a lightweight tag that we want to
		 * fetch.
		 */
		if (item && !has_sha1_file(item->util) &&
		    !will_fetch(head, item->util))
			item->util = NULL;

		item = NULL;

		/* skip duplicates and refs that we already have */
		if (string_list_has_string(&remote_refs, ref->name) ||
		    string_list_has_string(&existing_refs, ref->name))
			continue;

		item = string_list_insert(ref->name, &remote_refs);
		item->util = (void *)ref->old_sha1;
	}
	string_list_clear(&existing_refs, 0);

	/*
	 * We may have a final lightweight tag that needs to be
	 * checked to see if it needs fetching.
	 */
	if (item && !has_sha1_file(item->util) &&
	    !will_fetch(head, item->util))
		item->util = NULL;

	/*
	 * For all the tags in the remote_refs string list, call
	 * add_to_tail to add them to the list of refs to be fetched
	 */
	for_each_string_list(add_to_tail, &remote_refs, &data);

	string_list_clear(&remote_refs, 0);
}
예제 #17
0
파일: builtin-clone.c 프로젝트: Inkdit/git
int cmd_clone(int argc, const char **argv, const char *prefix)
{
	int use_local_hardlinks = 1;
	int use_separate_remote = 1;
	int is_bundle = 0;
	struct stat buf;
	const char *repo_name, *repo, *work_tree, *git_dir;
	char *path, *dir;
	const struct ref *refs, *head_points_at, *remote_head, *mapped_refs;
	char branch_top[256], key[256], value[256];
	struct strbuf reflog_msg = STRBUF_INIT;
	struct transport *transport = NULL;
	char *src_ref_prefix = "refs/heads/";

	struct refspec refspec;

	junk_pid = getpid();

	argc = parse_options(argc, argv, builtin_clone_options,
			     builtin_clone_usage, 0);

	if (argc == 0)
		die("You must specify a repository to clone.");

	if (option_no_hardlinks)
		use_local_hardlinks = 0;

	if (option_mirror)
		option_bare = 1;

	if (option_bare) {
		if (option_origin)
			die("--bare and --origin %s options are incompatible.",
			    option_origin);
		option_no_checkout = 1;
		use_separate_remote = 0;
	}

	if (!option_origin)
		option_origin = "origin";

	repo_name = argv[0];

	path = get_repo_path(repo_name, &is_bundle);
	if (path)
		repo = xstrdup(make_nonrelative_path(repo_name));
	else if (!strchr(repo_name, ':'))
		repo = xstrdup(make_absolute_path(repo_name));
	else
		repo = repo_name;

	if (argc == 2)
		dir = xstrdup(argv[1]);
	else
		dir = guess_dir_name(repo_name, is_bundle, option_bare);
	strip_trailing_slashes(dir);

	if (!stat(dir, &buf))
		die("destination directory '%s' already exists.", dir);

	strbuf_addf(&reflog_msg, "clone: from %s", repo);

	if (option_bare)
		work_tree = NULL;
	else {
		work_tree = getenv("GIT_WORK_TREE");
		if (work_tree && !stat(work_tree, &buf))
			die("working tree '%s' already exists.", work_tree);
	}

	if (option_bare || work_tree)
		git_dir = xstrdup(dir);
	else {
		work_tree = dir;
		git_dir = xstrdup(mkpath("%s/.git", dir));
	}

	if (!option_bare) {
		junk_work_tree = work_tree;
		if (safe_create_leading_directories_const(work_tree) < 0)
			die("could not create leading directories of '%s': %s",
					work_tree, strerror(errno));
		if (mkdir(work_tree, 0755))
			die("could not create work tree dir '%s': %s.",
					work_tree, strerror(errno));
		set_git_work_tree(work_tree);
	}
	junk_git_dir = git_dir;
	atexit(remove_junk);
	signal(SIGINT, remove_junk_on_signal);

	setenv(CONFIG_ENVIRONMENT, xstrdup(mkpath("%s/config", git_dir)), 1);

	if (safe_create_leading_directories_const(git_dir) < 0)
		die("could not create leading directories of '%s'", git_dir);
	set_git_dir(make_absolute_path(git_dir));

	init_db(option_template, option_quiet ? INIT_DB_QUIET : 0);

	/*
	 * At this point, the config exists, so we do not need the
	 * environment variable.  We actually need to unset it, too, to
	 * re-enable parsing of the global configs.
	 */
	unsetenv(CONFIG_ENVIRONMENT);

	if (option_reference)
		setup_reference(git_dir);

	git_config(git_default_config, NULL);

	if (option_bare) {
		if (option_mirror)
			src_ref_prefix = "refs/";
		strcpy(branch_top, src_ref_prefix);

		git_config_set("core.bare", "true");
	} else {
		snprintf(branch_top, sizeof(branch_top),
			 "refs/remotes/%s/", option_origin);
	}

	if (option_mirror || !option_bare) {
		/* Configure the remote */
		if (option_mirror) {
			snprintf(key, sizeof(key),
					"remote.%s.mirror", option_origin);
			git_config_set(key, "true");
		}

		snprintf(key, sizeof(key), "remote.%s.url", option_origin);
		git_config_set(key, repo);

		snprintf(key, sizeof(key), "remote.%s.fetch", option_origin);
		snprintf(value, sizeof(value),
				"+%s*:%s*", src_ref_prefix, branch_top);
		git_config_set_multivar(key, value, "^$", 0);
	}

	refspec.force = 0;
	refspec.pattern = 1;
	refspec.src = src_ref_prefix;
	refspec.dst = branch_top;

	if (path && !is_bundle)
		refs = clone_local(path, git_dir);
	else {
		struct remote *remote = remote_get(argv[0]);
		transport = transport_get(remote, remote->url[0]);

		if (!transport->get_refs_list || !transport->fetch)
			die("Don't know how to clone %s", transport->url);

		transport_set_option(transport, TRANS_OPT_KEEP, "yes");

		if (option_depth)
			transport_set_option(transport, TRANS_OPT_DEPTH,
					     option_depth);

		if (option_quiet)
			transport->verbose = -1;
		else if (option_verbose)
			transport->progress = 1;

		if (option_upload_pack)
			transport_set_option(transport, TRANS_OPT_UPLOADPACK,
					     option_upload_pack);

		refs = transport_get_remote_refs(transport);
		transport_fetch_refs(transport, refs);
	}

	clear_extra_refs();

	mapped_refs = write_remote_refs(refs, &refspec, reflog_msg.buf);

	head_points_at = locate_head(refs, mapped_refs, &remote_head);

	if (head_points_at) {
		/* Local default branch link */
		create_symref("HEAD", head_points_at->name, NULL);

		if (!option_bare) {
			struct strbuf head_ref = STRBUF_INIT;
			const char *head = head_points_at->name;

			if (!prefixcmp(head, "refs/heads/"))
				head += 11;

			/* Set up the initial local branch */

			/* Local branch initial value */
			update_ref(reflog_msg.buf, "HEAD",
				   head_points_at->old_sha1,
				   NULL, 0, DIE_ON_ERR);

			strbuf_addstr(&head_ref, branch_top);
			strbuf_addstr(&head_ref, "HEAD");

			/* Remote branch link */
			create_symref(head_ref.buf,
				      head_points_at->peer_ref->name,
				      reflog_msg.buf);

			snprintf(key, sizeof(key), "branch.%s.remote", head);
			git_config_set(key, option_origin);
			snprintf(key, sizeof(key), "branch.%s.merge", head);
			git_config_set(key, head_points_at->name);
		}
	} else if (remote_head) {
		/* Source had detached HEAD pointing somewhere. */
		if (!option_bare)
			update_ref(reflog_msg.buf, "HEAD",
				   remote_head->old_sha1,
				   NULL, REF_NODEREF, DIE_ON_ERR);
	} else {
		/* Nothing to checkout out */
		if (!option_no_checkout)
			warning("remote HEAD refers to nonexistent ref, "
				"unable to checkout.\n");
		option_no_checkout = 1;
	}

	if (transport)
		transport_unlock_pack(transport);

	if (!option_no_checkout) {
		struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
		struct unpack_trees_options opts;
		struct tree *tree;
		struct tree_desc t;
		int fd;

		/* We need to be in the new work tree for the checkout */
		setup_work_tree();

		fd = hold_locked_index(lock_file, 1);

		memset(&opts, 0, sizeof opts);
		opts.update = 1;
		opts.merge = 1;
		opts.fn = oneway_merge;
		opts.verbose_update = !option_quiet;
		opts.src_index = &the_index;
		opts.dst_index = &the_index;

		tree = parse_tree_indirect(remote_head->old_sha1);
		parse_tree(tree);
		init_tree_desc(&t, tree->buffer, tree->size);
		unpack_trees(1, &t, &opts);

		if (write_cache(fd, active_cache, active_nr) ||
		    commit_locked_index(lock_file))
			die("unable to write new index file");
	}

	strbuf_release(&reflog_msg);
	junk_pid = 0;
	return 0;
}
예제 #18
0
파일: builtin-clone.c 프로젝트: astubbs/git
int cmd_clone(int argc, const char **argv, const char *prefix)
{
	int is_bundle = 0;
	struct stat buf;
	const char *repo_name, *repo, *work_tree, *git_dir;
	char *path, *dir;
	int dest_exists;
	const struct ref *refs, *remote_head;
	const struct ref *remote_head_points_at;
	const struct ref *our_head_points_at;
	struct ref *mapped_refs;
	struct strbuf key = STRBUF_INIT, value = STRBUF_INIT;
	struct strbuf branch_top = STRBUF_INIT, reflog_msg = STRBUF_INIT;
	struct transport *transport = NULL;
	char *src_ref_prefix = "refs/heads/";
	int err = 0;

	struct refspec *refspec;
	const char *fetch_pattern;

	junk_pid = getpid();

	argc = parse_options(argc, argv, prefix, builtin_clone_options,
			     builtin_clone_usage, 0);

	if (argc > 2)
		usage_msg_opt("Too many arguments.",
			builtin_clone_usage, builtin_clone_options);

	if (argc == 0)
		usage_msg_opt("You must specify a repository to clone.",
			builtin_clone_usage, builtin_clone_options);

	if (option_mirror)
		option_bare = 1;

	if (option_bare) {
		if (option_origin)
			die("--bare and --origin %s options are incompatible.",
			    option_origin);
		option_no_checkout = 1;
	}

	if (!option_origin)
		option_origin = "origin";

	repo_name = argv[0];

	path = get_repo_path(repo_name, &is_bundle);
	if (path)
		repo = xstrdup(make_nonrelative_path(repo_name));
	else if (!strchr(repo_name, ':'))
		repo = xstrdup(make_absolute_path(repo_name));
	else
		repo = repo_name;

	if (argc == 2)
		dir = xstrdup(argv[1]);
	else
		dir = guess_dir_name(repo_name, is_bundle, option_bare);
	strip_trailing_slashes(dir);

	dest_exists = !stat(dir, &buf);
	if (dest_exists && !is_empty_dir(dir))
		die("destination path '%s' already exists and is not "
			"an empty directory.", dir);

	strbuf_addf(&reflog_msg, "clone: from %s", repo);

	if (option_bare)
		work_tree = NULL;
	else {
		work_tree = getenv("GIT_WORK_TREE");
		if (work_tree && !stat(work_tree, &buf))
			die("working tree '%s' already exists.", work_tree);
	}

	if (option_bare || work_tree)
		git_dir = xstrdup(dir);
	else {
		work_tree = dir;
		git_dir = xstrdup(mkpath("%s/.git", dir));
	}

	if (!option_bare) {
		junk_work_tree = work_tree;
		if (safe_create_leading_directories_const(work_tree) < 0)
			die_errno("could not create leading directories of '%s'",
				  work_tree);
		if (!dest_exists && mkdir(work_tree, 0755))
			die_errno("could not create work tree dir '%s'.",
				  work_tree);
		set_git_work_tree(work_tree);
	}
	junk_git_dir = git_dir;
	atexit(remove_junk);
	sigchain_push_common(remove_junk_on_signal);

	setenv(CONFIG_ENVIRONMENT, mkpath("%s/config", git_dir), 1);

	if (safe_create_leading_directories_const(git_dir) < 0)
		die("could not create leading directories of '%s'", git_dir);
	set_git_dir(make_absolute_path(git_dir));

	init_db(option_template, option_quiet ? INIT_DB_QUIET : 0);

	/*
	 * At this point, the config exists, so we do not need the
	 * environment variable.  We actually need to unset it, too, to
	 * re-enable parsing of the global configs.
	 */
	unsetenv(CONFIG_ENVIRONMENT);

	if (option_reference)
		setup_reference(git_dir);

	git_config(git_default_config, NULL);

	if (option_bare) {
		if (option_mirror)
			src_ref_prefix = "refs/";
		strbuf_addstr(&branch_top, src_ref_prefix);

		git_config_set("core.bare", "true");
	} else {
		strbuf_addf(&branch_top, "refs/remotes/%s/", option_origin);
	}

	strbuf_addf(&value, "+%s*:%s*", src_ref_prefix, branch_top.buf);

	if (option_mirror || !option_bare) {
		/* Configure the remote */
		strbuf_addf(&key, "remote.%s.fetch", option_origin);
		git_config_set_multivar(key.buf, value.buf, "^$", 0);
		strbuf_reset(&key);

		if (option_mirror) {
			strbuf_addf(&key, "remote.%s.mirror", option_origin);
			git_config_set(key.buf, "true");
			strbuf_reset(&key);
		}

		strbuf_addf(&key, "remote.%s.url", option_origin);
		git_config_set(key.buf, repo);
		strbuf_reset(&key);
	}

	fetch_pattern = value.buf;
	refspec = parse_fetch_refspec(1, &fetch_pattern);

	strbuf_reset(&value);

	if (path && !is_bundle) {
		refs = clone_local(path, git_dir);
		mapped_refs = wanted_peer_refs(refs, refspec);
	} else {
		struct remote *remote = remote_get(argv[0]);
		transport = transport_get(remote, remote->url[0]);

		if (!transport->get_refs_list || !transport->fetch)
			die("Don't know how to clone %s", transport->url);

		transport_set_option(transport, TRANS_OPT_KEEP, "yes");

		if (option_depth)
			transport_set_option(transport, TRANS_OPT_DEPTH,
					     option_depth);

		if (option_quiet)
			transport->verbose = -1;
		else if (option_verbose)
			transport->verbose = 1;

		if (option_progress)
			transport->progress = 1;

		if (option_upload_pack)
			transport_set_option(transport, TRANS_OPT_UPLOADPACK,
					     option_upload_pack);

		refs = transport_get_remote_refs(transport);
		if (refs) {
			mapped_refs = wanted_peer_refs(refs, refspec);
			transport_fetch_refs(transport, mapped_refs);
		}
	}

	if (refs) {
		clear_extra_refs();

		write_remote_refs(mapped_refs);

		remote_head = find_ref_by_name(refs, "HEAD");
		remote_head_points_at =
			guess_remote_head(remote_head, mapped_refs, 0);

		if (option_branch) {
			struct strbuf head = STRBUF_INIT;
			strbuf_addstr(&head, src_ref_prefix);
			strbuf_addstr(&head, option_branch);
			our_head_points_at =
				find_ref_by_name(mapped_refs, head.buf);
			strbuf_release(&head);

			if (!our_head_points_at) {
				warning("Remote branch %s not found in "
					"upstream %s, using HEAD instead",
					option_branch, option_origin);
				our_head_points_at = remote_head_points_at;
			}
		}
		else
			our_head_points_at = remote_head_points_at;
	}
	else {
		warning("You appear to have cloned an empty repository.");
		our_head_points_at = NULL;
		remote_head_points_at = NULL;
		remote_head = NULL;
		option_no_checkout = 1;
		if (!option_bare)
			install_branch_config(0, "master", option_origin,
					      "refs/heads/master");
	}

	if (remote_head_points_at && !option_bare) {
		struct strbuf head_ref = STRBUF_INIT;
		strbuf_addstr(&head_ref, branch_top.buf);
		strbuf_addstr(&head_ref, "HEAD");
		create_symref(head_ref.buf,
			      remote_head_points_at->peer_ref->name,
			      reflog_msg.buf);
	}

	if (our_head_points_at) {
		/* Local default branch link */
		create_symref("HEAD", our_head_points_at->name, NULL);
		if (!option_bare) {
			const char *head = skip_prefix(our_head_points_at->name,
						       "refs/heads/");
			update_ref(reflog_msg.buf, "HEAD",
				   our_head_points_at->old_sha1,
				   NULL, 0, DIE_ON_ERR);
			install_branch_config(0, head, option_origin,
					      our_head_points_at->name);
		}
	} else if (remote_head) {
		/* Source had detached HEAD pointing somewhere. */
		if (!option_bare) {
			update_ref(reflog_msg.buf, "HEAD",
				   remote_head->old_sha1,
				   NULL, REF_NODEREF, DIE_ON_ERR);
			our_head_points_at = remote_head;
		}
	} else {
		/* Nothing to checkout out */
		if (!option_no_checkout)
			warning("remote HEAD refers to nonexistent ref, "
				"unable to checkout.\n");
		option_no_checkout = 1;
	}

	if (transport) {
		transport_unlock_pack(transport);
		transport_disconnect(transport);
	}

	if (!option_no_checkout) {
		struct lock_file *lock_file = xcalloc(1, sizeof(struct lock_file));
		struct unpack_trees_options opts;
		struct tree *tree;
		struct tree_desc t;
		int fd;

		/* We need to be in the new work tree for the checkout */
		setup_work_tree();

		fd = hold_locked_index(lock_file, 1);

		memset(&opts, 0, sizeof opts);
		opts.update = 1;
		opts.merge = 1;
		opts.fn = oneway_merge;
		opts.verbose_update = !option_quiet;
		opts.src_index = &the_index;
		opts.dst_index = &the_index;

		tree = parse_tree_indirect(our_head_points_at->old_sha1);
		parse_tree(tree);
		init_tree_desc(&t, tree->buffer, tree->size);
		unpack_trees(1, &t, &opts);

		if (write_cache(fd, active_cache, active_nr) ||
		    commit_locked_index(lock_file))
			die("unable to write new index file");

		err |= run_hook(NULL, "post-checkout", sha1_to_hex(null_sha1),
				sha1_to_hex(our_head_points_at->old_sha1), "1",
				NULL);

		if (!err && option_recursive)
			err = run_command_v_opt(argv_submodule, RUN_GIT_CMD);
	}

	strbuf_release(&reflog_msg);
	strbuf_release(&branch_top);
	strbuf_release(&key);
	strbuf_release(&value);
	junk_pid = 0;
	return err;
}