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-rw-r--r--third_party/git/transport-helper.c1604
1 files changed, 0 insertions, 1604 deletions
diff --git a/third_party/git/transport-helper.c b/third_party/git/transport-helper.c
deleted file mode 100644
index b573b6c730cc..000000000000
--- a/third_party/git/transport-helper.c
+++ /dev/null
@@ -1,1604 +0,0 @@
-#include "cache.h"
-#include "transport.h"
-#include "quote.h"
-#include "run-command.h"
-#include "commit.h"
-#include "diff.h"
-#include "revision.h"
-#include "remote.h"
-#include "string-list.h"
-#include "thread-utils.h"
-#include "sigchain.h"
-#include "strvec.h"
-#include "refs.h"
-#include "refspec.h"
-#include "transport-internal.h"
-#include "protocol.h"
-
-static int debug;
-
-struct helper_data {
-	const char *name;
-	struct child_process *helper;
-	FILE *out;
-	unsigned fetch : 1,
-		import : 1,
-		bidi_import : 1,
-		export : 1,
-		option : 1,
-		push : 1,
-		connect : 1,
-		stateless_connect : 1,
-		signed_tags : 1,
-		check_connectivity : 1,
-		no_disconnect_req : 1,
-		no_private_update : 1,
-		object_format : 1;
-
-	/*
-	 * As an optimization, the transport code may invoke fetch before
-	 * get_refs_list. If this happens, and if the transport helper doesn't
-	 * support connect or stateless_connect, we need to invoke
-	 * get_refs_list ourselves if we haven't already done so. Keep track of
-	 * whether we have invoked get_refs_list.
-	 */
-	unsigned get_refs_list_called : 1;
-
-	char *export_marks;
-	char *import_marks;
-	/* These go from remote name (as in "list") to private name */
-	struct refspec rs;
-	/* Transport options for fetch-pack/send-pack (should one of
-	 * those be invoked).
-	 */
-	struct git_transport_options transport_options;
-};
-
-static void sendline(struct helper_data *helper, struct strbuf *buffer)
-{
-	if (debug)
-		fprintf(stderr, "Debug: Remote helper: -> %s", buffer->buf);
-	if (write_in_full(helper->helper->in, buffer->buf, buffer->len) < 0)
-		die_errno(_("full write to remote helper failed"));
-}
-
-static int recvline_fh(FILE *helper, struct strbuf *buffer)
-{
-	strbuf_reset(buffer);
-	if (debug)
-		fprintf(stderr, "Debug: Remote helper: Waiting...\n");
-	if (strbuf_getline(buffer, helper) == EOF) {
-		if (debug)
-			fprintf(stderr, "Debug: Remote helper quit.\n");
-		return 1;
-	}
-
-	if (debug)
-		fprintf(stderr, "Debug: Remote helper: <- %s\n", buffer->buf);
-	return 0;
-}
-
-static int recvline(struct helper_data *helper, struct strbuf *buffer)
-{
-	return recvline_fh(helper->out, buffer);
-}
-
-static void write_constant(int fd, const char *str)
-{
-	if (debug)
-		fprintf(stderr, "Debug: Remote helper: -> %s", str);
-	if (write_in_full(fd, str, strlen(str)) < 0)
-		die_errno(_("full write to remote helper failed"));
-}
-
-static const char *remove_ext_force(const char *url)
-{
-	if (url) {
-		const char *colon = strchr(url, ':');
-		if (colon && colon[1] == ':')
-			return colon + 2;
-	}
-	return url;
-}
-
-static void do_take_over(struct transport *transport)
-{
-	struct helper_data *data;
-	data = (struct helper_data *)transport->data;
-	transport_take_over(transport, data->helper);
-	fclose(data->out);
-	free(data);
-}
-
-static void standard_options(struct transport *t);
-
-static struct child_process *get_helper(struct transport *transport)
-{
-	struct helper_data *data = transport->data;
-	struct strbuf buf = STRBUF_INIT;
-	struct child_process *helper;
-	int duped;
-	int code;
-
-	if (data->helper)
-		return data->helper;
-
-	helper = xmalloc(sizeof(*helper));
-	child_process_init(helper);
-	helper->in = -1;
-	helper->out = -1;
-	helper->err = 0;
-	strvec_pushf(&helper->args, "remote-%s", data->name);
-	strvec_push(&helper->args, transport->remote->name);
-	strvec_push(&helper->args, remove_ext_force(transport->url));
-	helper->git_cmd = 1;
-	helper->silent_exec_failure = 1;
-
-	if (have_git_dir())
-		strvec_pushf(&helper->env_array, "%s=%s",
-			     GIT_DIR_ENVIRONMENT, get_git_dir());
-
-	helper->trace2_child_class = helper->args.v[0]; /* "remote-<name>" */
-
-	code = start_command(helper);
-	if (code < 0 && errno == ENOENT)
-		die(_("unable to find remote helper for '%s'"), data->name);
-	else if (code != 0)
-		exit(code);
-
-	data->helper = helper;
-	data->no_disconnect_req = 0;
-	refspec_init(&data->rs, REFSPEC_FETCH);
-
-	/*
-	 * Open the output as FILE* so strbuf_getline_*() family of
-	 * functions can be used.
-	 * Do this with duped fd because fclose() will close the fd,
-	 * and stuff like taking over will require the fd to remain.
-	 */
-	duped = dup(helper->out);
-	if (duped < 0)
-		die_errno(_("can't dup helper output fd"));
-	data->out = xfdopen(duped, "r");
-
-	write_constant(helper->in, "capabilities\n");
-
-	while (1) {
-		const char *capname, *arg;
-		int mandatory = 0;
-		if (recvline(data, &buf))
-			exit(128);
-
-		if (!*buf.buf)
-			break;
-
-		if (*buf.buf == '*') {
-			capname = buf.buf + 1;
-			mandatory = 1;
-		} else
-			capname = buf.buf;
-
-		if (debug)
-			fprintf(stderr, "Debug: Got cap %s\n", capname);
-		if (!strcmp(capname, "fetch"))
-			data->fetch = 1;
-		else if (!strcmp(capname, "option"))
-			data->option = 1;
-		else if (!strcmp(capname, "push"))
-			data->push = 1;
-		else if (!strcmp(capname, "import"))
-			data->import = 1;
-		else if (!strcmp(capname, "bidi-import"))
-			data->bidi_import = 1;
-		else if (!strcmp(capname, "export"))
-			data->export = 1;
-		else if (!strcmp(capname, "check-connectivity"))
-			data->check_connectivity = 1;
-		else if (skip_prefix(capname, "refspec ", &arg)) {
-			refspec_append(&data->rs, arg);
-		} else if (!strcmp(capname, "connect")) {
-			data->connect = 1;
-		} else if (!strcmp(capname, "stateless-connect")) {
-			data->stateless_connect = 1;
-		} else if (!strcmp(capname, "signed-tags")) {
-			data->signed_tags = 1;
-		} else if (skip_prefix(capname, "export-marks ", &arg)) {
-			data->export_marks = xstrdup(arg);
-		} else if (skip_prefix(capname, "import-marks ", &arg)) {
-			data->import_marks = xstrdup(arg);
-		} else if (starts_with(capname, "no-private-update")) {
-			data->no_private_update = 1;
-		} else if (starts_with(capname, "object-format")) {
-			data->object_format = 1;
-		} else if (mandatory) {
-			die(_("unknown mandatory capability %s; this remote "
-			      "helper probably needs newer version of Git"),
-			    capname);
-		}
-	}
-	if (!data->rs.nr && (data->import || data->bidi_import || data->export)) {
-		warning(_("this remote helper should implement refspec capability"));
-	}
-	strbuf_release(&buf);
-	if (debug)
-		fprintf(stderr, "Debug: Capabilities complete.\n");
-	standard_options(transport);
-	return data->helper;
-}
-
-static int disconnect_helper(struct transport *transport)
-{
-	struct helper_data *data = transport->data;
-	int res = 0;
-
-	if (data->helper) {
-		if (debug)
-			fprintf(stderr, "Debug: Disconnecting.\n");
-		if (!data->no_disconnect_req) {
-			/*
-			 * Ignore write errors; there's nothing we can do,
-			 * since we're about to close the pipe anyway. And the
-			 * most likely error is EPIPE due to the helper dying
-			 * to report an error itself.
-			 */
-			sigchain_push(SIGPIPE, SIG_IGN);
-			xwrite(data->helper->in, "\n", 1);
-			sigchain_pop(SIGPIPE);
-		}
-		close(data->helper->in);
-		close(data->helper->out);
-		fclose(data->out);
-		res = finish_command(data->helper);
-		FREE_AND_NULL(data->helper);
-	}
-	return res;
-}
-
-static const char *unsupported_options[] = {
-	TRANS_OPT_UPLOADPACK,
-	TRANS_OPT_RECEIVEPACK,
-	TRANS_OPT_THIN,
-	TRANS_OPT_KEEP
-	};
-
-static const char *boolean_options[] = {
-	TRANS_OPT_THIN,
-	TRANS_OPT_KEEP,
-	TRANS_OPT_FOLLOWTAGS,
-	TRANS_OPT_DEEPEN_RELATIVE
-	};
-
-static int strbuf_set_helper_option(struct helper_data *data,
-				    struct strbuf *buf)
-{
-	int ret;
-
-	sendline(data, buf);
-	if (recvline(data, buf))
-		exit(128);
-
-	if (!strcmp(buf->buf, "ok"))
-		ret = 0;
-	else if (starts_with(buf->buf, "error"))
-		ret = -1;
-	else if (!strcmp(buf->buf, "unsupported"))
-		ret = 1;
-	else {
-		warning(_("%s unexpectedly said: '%s'"), data->name, buf->buf);
-		ret = 1;
-	}
-	return ret;
-}
-
-static int string_list_set_helper_option(struct helper_data *data,
-					 const char *name,
-					 struct string_list *list)
-{
-	struct strbuf buf = STRBUF_INIT;
-	int i, ret = 0;
-
-	for (i = 0; i < list->nr; i++) {
-		strbuf_addf(&buf, "option %s ", name);
-		quote_c_style(list->items[i].string, &buf, NULL, 0);
-		strbuf_addch(&buf, '\n');
-
-		if ((ret = strbuf_set_helper_option(data, &buf)))
-			break;
-		strbuf_reset(&buf);
-	}
-	strbuf_release(&buf);
-	return ret;
-}
-
-static int set_helper_option(struct transport *transport,
-			  const char *name, const char *value)
-{
-	struct helper_data *data = transport->data;
-	struct strbuf buf = STRBUF_INIT;
-	int i, ret, is_bool = 0;
-
-	get_helper(transport);
-
-	if (!data->option)
-		return 1;
-
-	if (!strcmp(name, "deepen-not"))
-		return string_list_set_helper_option(data, name,
-						     (struct string_list *)value);
-
-	for (i = 0; i < ARRAY_SIZE(unsupported_options); i++) {
-		if (!strcmp(name, unsupported_options[i]))
-			return 1;
-	}
-
-	for (i = 0; i < ARRAY_SIZE(boolean_options); i++) {
-		if (!strcmp(name, boolean_options[i])) {
-			is_bool = 1;
-			break;
-		}
-	}
-
-	strbuf_addf(&buf, "option %s ", name);
-	if (is_bool)
-		strbuf_addstr(&buf, value ? "true" : "false");
-	else
-		quote_c_style(value, &buf, NULL, 0);
-	strbuf_addch(&buf, '\n');
-
-	ret = strbuf_set_helper_option(data, &buf);
-	strbuf_release(&buf);
-	return ret;
-}
-
-static void standard_options(struct transport *t)
-{
-	char buf[16];
-	int v = t->verbose;
-
-	set_helper_option(t, "progress", t->progress ? "true" : "false");
-
-	xsnprintf(buf, sizeof(buf), "%d", v + 1);
-	set_helper_option(t, "verbosity", buf);
-
-	switch (t->family) {
-	case TRANSPORT_FAMILY_ALL:
-		/*
-		 * this is already the default,
-		 * do not break old remote helpers by setting "all" here
-		 */
-		break;
-	case TRANSPORT_FAMILY_IPV4:
-		set_helper_option(t, "family", "ipv4");
-		break;
-	case TRANSPORT_FAMILY_IPV6:
-		set_helper_option(t, "family", "ipv6");
-		break;
-	}
-}
-
-static int release_helper(struct transport *transport)
-{
-	int res = 0;
-	struct helper_data *data = transport->data;
-	refspec_clear(&data->rs);
-	res = disconnect_helper(transport);
-	free(transport->data);
-	return res;
-}
-
-static int fetch_with_fetch(struct transport *transport,
-			    int nr_heads, struct ref **to_fetch)
-{
-	struct helper_data *data = transport->data;
-	int i;
-	struct strbuf buf = STRBUF_INIT;
-
-	for (i = 0; i < nr_heads; i++) {
-		const struct ref *posn = to_fetch[i];
-		if (posn->status & REF_STATUS_UPTODATE)
-			continue;
-
-		strbuf_addf(&buf, "fetch %s %s\n",
-			    oid_to_hex(&posn->old_oid),
-			    posn->symref ? posn->symref : posn->name);
-	}
-
-	strbuf_addch(&buf, '\n');
-	sendline(data, &buf);
-
-	while (1) {
-		const char *name;
-
-		if (recvline(data, &buf))
-			exit(128);
-
-		if (skip_prefix(buf.buf, "lock ", &name)) {
-			if (transport->pack_lockfiles.nr)
-				warning(_("%s also locked %s"), data->name, name);
-			else
-				string_list_append(&transport->pack_lockfiles,
-						   name);
-		}
-		else if (data->check_connectivity &&
-			 data->transport_options.check_self_contained_and_connected &&
-			 !strcmp(buf.buf, "connectivity-ok"))
-			data->transport_options.self_contained_and_connected = 1;
-		else if (!buf.len)
-			break;
-		else
-			warning(_("%s unexpectedly said: '%s'"), data->name, buf.buf);
-	}
-	strbuf_release(&buf);
-	return 0;
-}
-
-static int get_importer(struct transport *transport, struct child_process *fastimport)
-{
-	struct child_process *helper = get_helper(transport);
-	struct helper_data *data = transport->data;
-	int cat_blob_fd, code;
-	child_process_init(fastimport);
-	fastimport->in = xdup(helper->out);
-	strvec_push(&fastimport->args, "fast-import");
-	strvec_push(&fastimport->args, "--allow-unsafe-features");
-	strvec_push(&fastimport->args, debug ? "--stats" : "--quiet");
-
-	if (data->bidi_import) {
-		cat_blob_fd = xdup(helper->in);
-		strvec_pushf(&fastimport->args, "--cat-blob-fd=%d", cat_blob_fd);
-	}
-	fastimport->git_cmd = 1;
-
-	code = start_command(fastimport);
-	return code;
-}
-
-static int get_exporter(struct transport *transport,
-			struct child_process *fastexport,
-			struct string_list *revlist_args)
-{
-	struct helper_data *data = transport->data;
-	struct child_process *helper = get_helper(transport);
-	int i;
-
-	child_process_init(fastexport);
-
-	/* we need to duplicate helper->in because we want to use it after
-	 * fastexport is done with it. */
-	fastexport->out = dup(helper->in);
-	strvec_push(&fastexport->args, "fast-export");
-	strvec_push(&fastexport->args, "--use-done-feature");
-	strvec_push(&fastexport->args, data->signed_tags ?
-		"--signed-tags=verbatim" : "--signed-tags=warn-strip");
-	if (data->export_marks)
-		strvec_pushf(&fastexport->args, "--export-marks=%s.tmp", data->export_marks);
-	if (data->import_marks)
-		strvec_pushf(&fastexport->args, "--import-marks=%s", data->import_marks);
-
-	for (i = 0; i < revlist_args->nr; i++)
-		strvec_push(&fastexport->args, revlist_args->items[i].string);
-
-	fastexport->git_cmd = 1;
-	return start_command(fastexport);
-}
-
-static int fetch_with_import(struct transport *transport,
-			     int nr_heads, struct ref **to_fetch)
-{
-	struct child_process fastimport;
-	struct helper_data *data = transport->data;
-	int i;
-	struct ref *posn;
-	struct strbuf buf = STRBUF_INIT;
-
-	get_helper(transport);
-
-	if (get_importer(transport, &fastimport))
-		die(_("couldn't run fast-import"));
-
-	for (i = 0; i < nr_heads; i++) {
-		posn = to_fetch[i];
-		if (posn->status & REF_STATUS_UPTODATE)
-			continue;
-
-		strbuf_addf(&buf, "import %s\n",
-			    posn->symref ? posn->symref : posn->name);
-		sendline(data, &buf);
-		strbuf_reset(&buf);
-	}
-
-	write_constant(data->helper->in, "\n");
-	/*
-	 * remote-helpers that advertise the bidi-import capability are required to
-	 * buffer the complete batch of import commands until this newline before
-	 * sending data to fast-import.
-	 * These helpers read back data from fast-import on their stdin, which could
-	 * be mixed with import commands, otherwise.
-	 */
-
-	if (finish_command(&fastimport))
-		die(_("error while running fast-import"));
-
-	/*
-	 * The fast-import stream of a remote helper that advertises
-	 * the "refspec" capability writes to the refs named after the
-	 * right hand side of the first refspec matching each ref we
-	 * were fetching.
-	 *
-	 * (If no "refspec" capability was specified, for historical
-	 * reasons we default to the equivalent of *:*.)
-	 *
-	 * Store the result in to_fetch[i].old_sha1.  Callers such
-	 * as "git fetch" can use the value to write feedback to the
-	 * terminal, populate FETCH_HEAD, and determine what new value
-	 * should be written to peer_ref if the update is a
-	 * fast-forward or this is a forced update.
-	 */
-	for (i = 0; i < nr_heads; i++) {
-		char *private, *name;
-		posn = to_fetch[i];
-		if (posn->status & REF_STATUS_UPTODATE)
-			continue;
-		name = posn->symref ? posn->symref : posn->name;
-		if (data->rs.nr)
-			private = apply_refspecs(&data->rs, name);
-		else
-			private = xstrdup(name);
-		if (private) {
-			if (read_ref(private, &posn->old_oid) < 0)
-				die(_("could not read ref %s"), private);
-			free(private);
-		}
-	}
-	strbuf_release(&buf);
-	return 0;
-}
-
-static int run_connect(struct transport *transport, struct strbuf *cmdbuf)
-{
-	struct helper_data *data = transport->data;
-	int ret = 0;
-	int duped;
-	FILE *input;
-	struct child_process *helper;
-
-	helper = get_helper(transport);
-
-	/*
-	 * Yes, dup the pipe another time, as we need unbuffered version
-	 * of input pipe as FILE*. fclose() closes the underlying fd and
-	 * stream buffering only can be changed before first I/O operation
-	 * on it.
-	 */
-	duped = dup(helper->out);
-	if (duped < 0)
-		die_errno(_("can't dup helper output fd"));
-	input = xfdopen(duped, "r");
-	setvbuf(input, NULL, _IONBF, 0);
-
-	sendline(data, cmdbuf);
-	if (recvline_fh(input, cmdbuf))
-		exit(128);
-
-	if (!strcmp(cmdbuf->buf, "")) {
-		data->no_disconnect_req = 1;
-		if (debug)
-			fprintf(stderr, "Debug: Smart transport connection "
-				"ready.\n");
-		ret = 1;
-	} else if (!strcmp(cmdbuf->buf, "fallback")) {
-		if (debug)
-			fprintf(stderr, "Debug: Falling back to dumb "
-				"transport.\n");
-	} else {
-		die(_("unknown response to connect: %s"),
-		    cmdbuf->buf);
-	}
-
-	fclose(input);
-	return ret;
-}
-
-static int process_connect_service(struct transport *transport,
-				   const char *name, const char *exec)
-{
-	struct helper_data *data = transport->data;
-	struct strbuf cmdbuf = STRBUF_INIT;
-	int ret = 0;
-
-	/*
-	 * Handle --upload-pack and friends. This is fire and forget...
-	 * just warn if it fails.
-	 */
-	if (strcmp(name, exec)) {
-		int r = set_helper_option(transport, "servpath", exec);
-		if (r > 0)
-			warning(_("setting remote service path not supported by protocol"));
-		else if (r < 0)
-			warning(_("invalid remote service path"));
-	}
-
-	if (data->connect) {
-		strbuf_addf(&cmdbuf, "connect %s\n", name);
-		ret = run_connect(transport, &cmdbuf);
-	} else if (data->stateless_connect &&
-		   (get_protocol_version_config() == protocol_v2) &&
-		   !strcmp("git-upload-pack", name)) {
-		strbuf_addf(&cmdbuf, "stateless-connect %s\n", name);
-		ret = run_connect(transport, &cmdbuf);
-		if (ret)
-			transport->stateless_rpc = 1;
-	}
-
-	strbuf_release(&cmdbuf);
-	return ret;
-}
-
-static int process_connect(struct transport *transport,
-				     int for_push)
-{
-	struct helper_data *data = transport->data;
-	const char *name;
-	const char *exec;
-
-	name = for_push ? "git-receive-pack" : "git-upload-pack";
-	if (for_push)
-		exec = data->transport_options.receivepack;
-	else
-		exec = data->transport_options.uploadpack;
-
-	return process_connect_service(transport, name, exec);
-}
-
-static int connect_helper(struct transport *transport, const char *name,
-		   const char *exec, int fd[2])
-{
-	struct helper_data *data = transport->data;
-
-	/* Get_helper so connect is inited. */
-	get_helper(transport);
-	if (!data->connect)
-		die(_("operation not supported by protocol"));
-
-	if (!process_connect_service(transport, name, exec))
-		die(_("can't connect to subservice %s"), name);
-
-	fd[0] = data->helper->out;
-	fd[1] = data->helper->in;
-	return 0;
-}
-
-static struct ref *get_refs_list_using_list(struct transport *transport,
-					    int for_push);
-
-static int fetch(struct transport *transport,
-		 int nr_heads, struct ref **to_fetch)
-{
-	struct helper_data *data = transport->data;
-	int i, count;
-
-	get_helper(transport);
-
-	if (process_connect(transport, 0)) {
-		do_take_over(transport);
-		return transport->vtable->fetch(transport, nr_heads, to_fetch);
-	}
-
-	if (!data->get_refs_list_called)
-		get_refs_list_using_list(transport, 0);
-
-	count = 0;
-	for (i = 0; i < nr_heads; i++)
-		if (!(to_fetch[i]->status & REF_STATUS_UPTODATE))
-			count++;
-
-	if (!count)
-		return 0;
-
-	if (data->check_connectivity &&
-	    data->transport_options.check_self_contained_and_connected)
-		set_helper_option(transport, "check-connectivity", "true");
-
-	if (transport->cloning)
-		set_helper_option(transport, "cloning", "true");
-
-	if (data->transport_options.update_shallow)
-		set_helper_option(transport, "update-shallow", "true");
-
-	if (data->transport_options.filter_options.choice) {
-		const char *spec = expand_list_objects_filter_spec(
-			&data->transport_options.filter_options);
-		set_helper_option(transport, "filter", spec);
-	}
-
-	if (data->transport_options.negotiation_tips)
-		warning("Ignoring --negotiation-tip because the protocol does not support it.");
-
-	if (data->fetch)
-		return fetch_with_fetch(transport, nr_heads, to_fetch);
-
-	if (data->import)
-		return fetch_with_import(transport, nr_heads, to_fetch);
-
-	return -1;
-}
-
-struct push_update_ref_state {
-	struct ref *hint;
-	struct ref_push_report *report;
-	int new_report;
-};
-
-static int push_update_ref_status(struct strbuf *buf,
-				   struct push_update_ref_state *state,
-				   struct ref *remote_refs)
-{
-	char *refname, *msg;
-	int status, forced = 0;
-
-	if (starts_with(buf->buf, "option ")) {
-		struct object_id old_oid, new_oid;
-		const char *key, *val;
-		char *p;
-
-		if (!state->hint || !(state->report || state->new_report))
-			die(_("'option' without a matching 'ok/error' directive"));
-		if (state->new_report) {
-			if (!state->hint->report) {
-				state->hint->report = xcalloc(1, sizeof(struct ref_push_report));
-				state->report = state->hint->report;
-			} else {
-				state->report = state->hint->report;
-				while (state->report->next)
-					state->report = state->report->next;
-				state->report->next = xcalloc(1, sizeof(struct ref_push_report));
-				state->report = state->report->next;
-			}
-			state->new_report = 0;
-		}
-		key = buf->buf + 7;
-		p = strchr(key, ' ');
-		if (p)
-			*p++ = '\0';
-		val = p;
-		if (!strcmp(key, "refname"))
-			state->report->ref_name = xstrdup_or_null(val);
-		else if (!strcmp(key, "old-oid") && val &&
-			 !parse_oid_hex(val, &old_oid, &val))
-			state->report->old_oid = oiddup(&old_oid);
-		else if (!strcmp(key, "new-oid") && val &&
-			 !parse_oid_hex(val, &new_oid, &val))
-			state->report->new_oid = oiddup(&new_oid);
-		else if (!strcmp(key, "forced-update"))
-			state->report->forced_update = 1;
-		/* Not update remote namespace again. */
-		return 1;
-	}
-
-	state->report = NULL;
-	state->new_report = 0;
-
-	if (starts_with(buf->buf, "ok ")) {
-		status = REF_STATUS_OK;
-		refname = buf->buf + 3;
-	} else if (starts_with(buf->buf, "error ")) {
-		status = REF_STATUS_REMOTE_REJECT;
-		refname = buf->buf + 6;
-	} else
-		die(_("expected ok/error, helper said '%s'"), buf->buf);
-
-	msg = strchr(refname, ' ');
-	if (msg) {
-		struct strbuf msg_buf = STRBUF_INIT;
-		const char *end;
-
-		*msg++ = '\0';
-		if (!unquote_c_style(&msg_buf, msg, &end))
-			msg = strbuf_detach(&msg_buf, NULL);
-		else
-			msg = xstrdup(msg);
-		strbuf_release(&msg_buf);
-
-		if (!strcmp(msg, "no match")) {
-			status = REF_STATUS_NONE;
-			FREE_AND_NULL(msg);
-		}
-		else if (!strcmp(msg, "up to date")) {
-			status = REF_STATUS_UPTODATE;
-			FREE_AND_NULL(msg);
-		}
-		else if (!strcmp(msg, "non-fast forward")) {
-			status = REF_STATUS_REJECT_NONFASTFORWARD;
-			FREE_AND_NULL(msg);
-		}
-		else if (!strcmp(msg, "already exists")) {
-			status = REF_STATUS_REJECT_ALREADY_EXISTS;
-			FREE_AND_NULL(msg);
-		}
-		else if (!strcmp(msg, "fetch first")) {
-			status = REF_STATUS_REJECT_FETCH_FIRST;
-			FREE_AND_NULL(msg);
-		}
-		else if (!strcmp(msg, "needs force")) {
-			status = REF_STATUS_REJECT_NEEDS_FORCE;
-			FREE_AND_NULL(msg);
-		}
-		else if (!strcmp(msg, "stale info")) {
-			status = REF_STATUS_REJECT_STALE;
-			FREE_AND_NULL(msg);
-		}
-		else if (!strcmp(msg, "forced update")) {
-			forced = 1;
-			FREE_AND_NULL(msg);
-		}
-	}
-
-	if (state->hint)
-		state->hint = find_ref_by_name(state->hint, refname);
-	if (!state->hint)
-		state->hint = find_ref_by_name(remote_refs, refname);
-	if (!state->hint) {
-		warning(_("helper reported unexpected status of %s"), refname);
-		return 1;
-	}
-
-	if (state->hint->status != REF_STATUS_NONE) {
-		/*
-		 * Earlier, the ref was marked not to be pushed, so ignore the ref
-		 * status reported by the remote helper if the latter is 'no match'.
-		 */
-		if (status == REF_STATUS_NONE)
-			return 1;
-	}
-
-	if (status == REF_STATUS_OK)
-		state->new_report = 1;
-	state->hint->status = status;
-	state->hint->forced_update |= forced;
-	state->hint->remote_status = msg;
-	return !(status == REF_STATUS_OK);
-}
-
-static int push_update_refs_status(struct helper_data *data,
-				    struct ref *remote_refs,
-				    int flags)
-{
-	struct ref *ref;
-	struct ref_push_report *report;
-	struct strbuf buf = STRBUF_INIT;
-	struct push_update_ref_state state = { remote_refs, NULL, 0 };
-
-	for (;;) {
-		if (recvline(data, &buf)) {
-			strbuf_release(&buf);
-			return 1;
-		}
-		if (!buf.len)
-			break;
-		push_update_ref_status(&buf, &state, remote_refs);
-	}
-	strbuf_release(&buf);
-
-	if (flags & TRANSPORT_PUSH_DRY_RUN || !data->rs.nr || data->no_private_update)
-		return 0;
-
-	/* propagate back the update to the remote namespace */
-	for (ref = remote_refs; ref; ref = ref->next) {
-		char *private;
-
-		if (ref->status != REF_STATUS_OK)
-			continue;
-
-		if (!ref->report) {
-			private = apply_refspecs(&data->rs, ref->name);
-			if (!private)
-				continue;
-			update_ref("update by helper", private, &(ref->new_oid),
-				   NULL, 0, 0);
-			free(private);
-		} else {
-			for (report = ref->report; report; report = report->next) {
-				private = apply_refspecs(&data->rs,
-							 report->ref_name
-							 ? report->ref_name
-							 : ref->name);
-				if (!private)
-					continue;
-				update_ref("update by helper", private,
-					   report->new_oid
-					   ? report->new_oid
-					   : &(ref->new_oid),
-					   NULL, 0, 0);
-				free(private);
-			}
-		}
-	}
-	return 0;
-}
-
-static void set_common_push_options(struct transport *transport,
-				   const char *name, int flags)
-{
-	if (flags & TRANSPORT_PUSH_DRY_RUN) {
-		if (set_helper_option(transport, "dry-run", "true") != 0)
-			die(_("helper %s does not support dry-run"), name);
-	} else if (flags & TRANSPORT_PUSH_CERT_ALWAYS) {
-		if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "true") != 0)
-			die(_("helper %s does not support --signed"), name);
-	} else if (flags & TRANSPORT_PUSH_CERT_IF_ASKED) {
-		if (set_helper_option(transport, TRANS_OPT_PUSH_CERT, "if-asked") != 0)
-			die(_("helper %s does not support --signed=if-asked"), name);
-	}
-
-	if (flags & TRANSPORT_PUSH_ATOMIC)
-		if (set_helper_option(transport, TRANS_OPT_ATOMIC, "true") != 0)
-			die(_("helper %s does not support --atomic"), name);
-
-	if (flags & TRANSPORT_PUSH_OPTIONS) {
-		struct string_list_item *item;
-		for_each_string_list_item(item, transport->push_options)
-			if (set_helper_option(transport, "push-option", item->string) != 0)
-				die(_("helper %s does not support 'push-option'"), name);
-	}
-}
-
-static int push_refs_with_push(struct transport *transport,
-			       struct ref *remote_refs, int flags)
-{
-	int force_all = flags & TRANSPORT_PUSH_FORCE;
-	int mirror = flags & TRANSPORT_PUSH_MIRROR;
-	int atomic = flags & TRANSPORT_PUSH_ATOMIC;
-	struct helper_data *data = transport->data;
-	struct strbuf buf = STRBUF_INIT;
-	struct ref *ref;
-	struct string_list cas_options = STRING_LIST_INIT_DUP;
-	struct string_list_item *cas_option;
-
-	get_helper(transport);
-	if (!data->push)
-		return 1;
-
-	for (ref = remote_refs; ref; ref = ref->next) {
-		if (!ref->peer_ref && !mirror)
-			continue;
-
-		/* Check for statuses set by set_ref_status_for_push() */
-		switch (ref->status) {
-		case REF_STATUS_REJECT_NONFASTFORWARD:
-		case REF_STATUS_REJECT_STALE:
-		case REF_STATUS_REJECT_ALREADY_EXISTS:
-			if (atomic) {
-				reject_atomic_push(remote_refs, mirror);
-				string_list_clear(&cas_options, 0);
-				return 0;
-			} else
-				continue;
-		case REF_STATUS_UPTODATE:
-			continue;
-		default:
-			; /* do nothing */
-		}
-
-		if (force_all)
-			ref->force = 1;
-
-		strbuf_addstr(&buf, "push ");
-		if (!ref->deletion) {
-			if (ref->force)
-				strbuf_addch(&buf, '+');
-			if (ref->peer_ref)
-				strbuf_addstr(&buf, ref->peer_ref->name);
-			else
-				strbuf_addstr(&buf, oid_to_hex(&ref->new_oid));
-		}
-		strbuf_addch(&buf, ':');
-		strbuf_addstr(&buf, ref->name);
-		strbuf_addch(&buf, '\n');
-
-		/*
-		 * The "--force-with-lease" options without explicit
-		 * values to expect have already been expanded into
-		 * the ref->old_oid_expect[] field; we can ignore
-		 * transport->smart_options->cas altogether and instead
-		 * can enumerate them from the refs.
-		 */
-		if (ref->expect_old_sha1) {
-			struct strbuf cas = STRBUF_INIT;
-			strbuf_addf(&cas, "%s:%s",
-				    ref->name, oid_to_hex(&ref->old_oid_expect));
-			string_list_append_nodup(&cas_options,
-						 strbuf_detach(&cas, NULL));
-		}
-	}
-	if (buf.len == 0) {
-		string_list_clear(&cas_options, 0);
-		return 0;
-	}
-
-	for_each_string_list_item(cas_option, &cas_options)
-		set_helper_option(transport, "cas", cas_option->string);
-	set_common_push_options(transport, data->name, flags);
-
-	strbuf_addch(&buf, '\n');
-	sendline(data, &buf);
-	strbuf_release(&buf);
-	string_list_clear(&cas_options, 0);
-
-	return push_update_refs_status(data, remote_refs, flags);
-}
-
-static int push_refs_with_export(struct transport *transport,
-		struct ref *remote_refs, int flags)
-{
-	struct ref *ref;
-	struct child_process *helper, exporter;
-	struct helper_data *data = transport->data;
-	struct string_list revlist_args = STRING_LIST_INIT_DUP;
-	struct strbuf buf = STRBUF_INIT;
-
-	if (!data->rs.nr)
-		die(_("remote-helper doesn't support push; refspec needed"));
-
-	set_common_push_options(transport, data->name, flags);
-	if (flags & TRANSPORT_PUSH_FORCE) {
-		if (set_helper_option(transport, "force", "true") != 0)
-			warning(_("helper %s does not support 'force'"), data->name);
-	}
-
-	helper = get_helper(transport);
-
-	write_constant(helper->in, "export\n");
-
-	for (ref = remote_refs; ref; ref = ref->next) {
-		char *private;
-		struct object_id oid;
-
-		private = apply_refspecs(&data->rs, ref->name);
-		if (private && !get_oid(private, &oid)) {
-			strbuf_addf(&buf, "^%s", private);
-			string_list_append_nodup(&revlist_args,
-						 strbuf_detach(&buf, NULL));
-			oidcpy(&ref->old_oid, &oid);
-		}
-		free(private);
-
-		if (ref->peer_ref) {
-			if (strcmp(ref->name, ref->peer_ref->name)) {
-				if (!ref->deletion) {
-					const char *name;
-					int flag;
-
-					/* Follow symbolic refs (mainly for HEAD). */
-					name = resolve_ref_unsafe(ref->peer_ref->name,
-								  RESOLVE_REF_READING,
-								  &oid, &flag);
-					if (!name || !(flag & REF_ISSYMREF))
-						name = ref->peer_ref->name;
-
-					strbuf_addf(&buf, "%s:%s", name, ref->name);
-				} else
-					strbuf_addf(&buf, ":%s", ref->name);
-
-				string_list_append(&revlist_args, "--refspec");
-				string_list_append(&revlist_args, buf.buf);
-				strbuf_release(&buf);
-			}
-			if (!ref->deletion)
-				string_list_append(&revlist_args, ref->peer_ref->name);
-		}
-	}
-
-	if (get_exporter(transport, &exporter, &revlist_args))
-		die(_("couldn't run fast-export"));
-
-	string_list_clear(&revlist_args, 1);
-
-	if (finish_command(&exporter))
-		die(_("error while running fast-export"));
-	if (push_update_refs_status(data, remote_refs, flags))
-		return 1;
-
-	if (data->export_marks) {
-		strbuf_addf(&buf, "%s.tmp", data->export_marks);
-		rename(buf.buf, data->export_marks);
-		strbuf_release(&buf);
-	}
-
-	return 0;
-}
-
-static int push_refs(struct transport *transport,
-		struct ref *remote_refs, int flags)
-{
-	struct helper_data *data = transport->data;
-
-	if (process_connect(transport, 1)) {
-		do_take_over(transport);
-		return transport->vtable->push_refs(transport, remote_refs, flags);
-	}
-
-	if (!remote_refs) {
-		fprintf(stderr,
-			_("No refs in common and none specified; doing nothing.\n"
-			  "Perhaps you should specify a branch.\n"));
-		return 0;
-	}
-
-	if (data->push)
-		return push_refs_with_push(transport, remote_refs, flags);
-
-	if (data->export)
-		return push_refs_with_export(transport, remote_refs, flags);
-
-	return -1;
-}
-
-
-static int has_attribute(const char *attrs, const char *attr)
-{
-	int len;
-	if (!attrs)
-		return 0;
-
-	len = strlen(attr);
-	for (;;) {
-		const char *space = strchrnul(attrs, ' ');
-		if (len == space - attrs && !strncmp(attrs, attr, len))
-			return 1;
-		if (!*space)
-			return 0;
-		attrs = space + 1;
-	}
-}
-
-static struct ref *get_refs_list(struct transport *transport, int for_push,
-				 const struct strvec *ref_prefixes)
-{
-	get_helper(transport);
-
-	if (process_connect(transport, for_push)) {
-		do_take_over(transport);
-		return transport->vtable->get_refs_list(transport, for_push, ref_prefixes);
-	}
-
-	return get_refs_list_using_list(transport, for_push);
-}
-
-static struct ref *get_refs_list_using_list(struct transport *transport,
-					    int for_push)
-{
-	struct helper_data *data = transport->data;
-	struct child_process *helper;
-	struct ref *ret = NULL;
-	struct ref **tail = &ret;
-	struct ref *posn;
-	struct strbuf buf = STRBUF_INIT;
-
-	data->get_refs_list_called = 1;
-	helper = get_helper(transport);
-
-	if (data->object_format) {
-		write_str_in_full(helper->in, "option object-format\n");
-		if (recvline(data, &buf) || strcmp(buf.buf, "ok"))
-			exit(128);
-	}
-
-	if (data->push && for_push)
-		write_str_in_full(helper->in, "list for-push\n");
-	else
-		write_str_in_full(helper->in, "list\n");
-
-	while (1) {
-		char *eov, *eon;
-		if (recvline(data, &buf))
-			exit(128);
-
-		if (!*buf.buf)
-			break;
-		else if (buf.buf[0] == ':') {
-			const char *value;
-			if (skip_prefix(buf.buf, ":object-format ", &value)) {
-				int algo = hash_algo_by_name(value);
-				if (algo == GIT_HASH_UNKNOWN)
-					die(_("unsupported object format '%s'"),
-					    value);
-				transport->hash_algo = &hash_algos[algo];
-			}
-			continue;
-		}
-
-		eov = strchr(buf.buf, ' ');
-		if (!eov)
-			die(_("malformed response in ref list: %s"), buf.buf);
-		eon = strchr(eov + 1, ' ');
-		*eov = '\0';
-		if (eon)
-			*eon = '\0';
-		*tail = alloc_ref(eov + 1);
-		if (buf.buf[0] == '@')
-			(*tail)->symref = xstrdup(buf.buf + 1);
-		else if (buf.buf[0] != '?')
-			get_oid_hex_algop(buf.buf, &(*tail)->old_oid, transport->hash_algo);
-		if (eon) {
-			if (has_attribute(eon + 1, "unchanged")) {
-				(*tail)->status |= REF_STATUS_UPTODATE;
-				if (read_ref((*tail)->name, &(*tail)->old_oid) < 0)
-					die(_("could not read ref %s"),
-					    (*tail)->name);
-			}
-		}
-		tail = &((*tail)->next);
-	}
-	if (debug)
-		fprintf(stderr, "Debug: Read ref listing.\n");
-	strbuf_release(&buf);
-
-	for (posn = ret; posn; posn = posn->next)
-		resolve_remote_symref(posn, ret);
-
-	return ret;
-}
-
-static struct transport_vtable vtable = {
-	set_helper_option,
-	get_refs_list,
-	fetch,
-	push_refs,
-	connect_helper,
-	release_helper
-};
-
-int transport_helper_init(struct transport *transport, const char *name)
-{
-	struct helper_data *data = xcalloc(1, sizeof(*data));
-	data->name = name;
-
-	transport_check_allowed(name);
-
-	if (getenv("GIT_TRANSPORT_HELPER_DEBUG"))
-		debug = 1;
-
-	transport->data = data;
-	transport->vtable = &vtable;
-	transport->smart_options = &(data->transport_options);
-	return 0;
-}
-
-/*
- * Linux pipes can buffer 65536 bytes at once (and most platforms can
- * buffer less), so attempt reads and writes with up to that size.
- */
-#define BUFFERSIZE 65536
-/* This should be enough to hold debugging message. */
-#define PBUFFERSIZE 8192
-
-/* Print bidirectional transfer loop debug message. */
-__attribute__((format (printf, 1, 2)))
-static void transfer_debug(const char *fmt, ...)
-{
-	/*
-	 * NEEDSWORK: This function is sometimes used from multiple threads, and
-	 * we end up using debug_enabled racily. That "should not matter" since
-	 * we always write the same value, but it's still wrong. This function
-	 * is listed in .tsan-suppressions for the time being.
-	 */
-
-	va_list args;
-	char msgbuf[PBUFFERSIZE];
-	static int debug_enabled = -1;
-
-	if (debug_enabled < 0)
-		debug_enabled = getenv("GIT_TRANSLOOP_DEBUG") ? 1 : 0;
-	if (!debug_enabled)
-		return;
-
-	va_start(args, fmt);
-	vsnprintf(msgbuf, PBUFFERSIZE, fmt, args);
-	va_end(args);
-	fprintf(stderr, "Transfer loop debugging: %s\n", msgbuf);
-}
-
-/* Stream state: More data may be coming in this direction. */
-#define SSTATE_TRANSFERRING 0
-/*
- * Stream state: No more data coming in this direction, flushing rest of
- * data.
- */
-#define SSTATE_FLUSHING 1
-/* Stream state: Transfer in this direction finished. */
-#define SSTATE_FINISHED 2
-
-#define STATE_NEEDS_READING(state) ((state) <= SSTATE_TRANSFERRING)
-#define STATE_NEEDS_WRITING(state) ((state) <= SSTATE_FLUSHING)
-#define STATE_NEEDS_CLOSING(state) ((state) == SSTATE_FLUSHING)
-
-/* Unidirectional transfer. */
-struct unidirectional_transfer {
-	/* Source */
-	int src;
-	/* Destination */
-	int dest;
-	/* Is source socket? */
-	int src_is_sock;
-	/* Is destination socket? */
-	int dest_is_sock;
-	/* Transfer state (TRANSFERRING/FLUSHING/FINISHED) */
-	int state;
-	/* Buffer. */
-	char buf[BUFFERSIZE];
-	/* Buffer used. */
-	size_t bufuse;
-	/* Name of source. */
-	const char *src_name;
-	/* Name of destination. */
-	const char *dest_name;
-};
-
-/* Closes the target (for writing) if transfer has finished. */
-static void udt_close_if_finished(struct unidirectional_transfer *t)
-{
-	if (STATE_NEEDS_CLOSING(t->state) && !t->bufuse) {
-		t->state = SSTATE_FINISHED;
-		if (t->dest_is_sock)
-			shutdown(t->dest, SHUT_WR);
-		else
-			close(t->dest);
-		transfer_debug("Closed %s.", t->dest_name);
-	}
-}
-
-/*
- * Tries to read data from source into buffer. If buffer is full,
- * no data is read. Returns 0 on success, -1 on error.
- */
-static int udt_do_read(struct unidirectional_transfer *t)
-{
-	ssize_t bytes;
-
-	if (t->bufuse == BUFFERSIZE)
-		return 0;	/* No space for more. */
-
-	transfer_debug("%s is readable", t->src_name);
-	bytes = xread(t->src, t->buf + t->bufuse, BUFFERSIZE - t->bufuse);
-	if (bytes < 0) {
-		error_errno(_("read(%s) failed"), t->src_name);
-		return -1;
-	} else if (bytes == 0) {
-		transfer_debug("%s EOF (with %i bytes in buffer)",
-			t->src_name, (int)t->bufuse);
-		t->state = SSTATE_FLUSHING;
-	} else if (bytes > 0) {
-		t->bufuse += bytes;
-		transfer_debug("Read %i bytes from %s (buffer now at %i)",
-			(int)bytes, t->src_name, (int)t->bufuse);
-	}
-	return 0;
-}
-
-/* Tries to write data from buffer into destination. If buffer is empty,
- * no data is written. Returns 0 on success, -1 on error.
- */
-static int udt_do_write(struct unidirectional_transfer *t)
-{
-	ssize_t bytes;
-
-	if (t->bufuse == 0)
-		return 0;	/* Nothing to write. */
-
-	transfer_debug("%s is writable", t->dest_name);
-	bytes = xwrite(t->dest, t->buf, t->bufuse);
-	if (bytes < 0) {
-		error_errno(_("write(%s) failed"), t->dest_name);
-		return -1;
-	} else if (bytes > 0) {
-		t->bufuse -= bytes;
-		if (t->bufuse)
-			memmove(t->buf, t->buf + bytes, t->bufuse);
-		transfer_debug("Wrote %i bytes to %s (buffer now at %i)",
-			(int)bytes, t->dest_name, (int)t->bufuse);
-	}
-	return 0;
-}
-
-
-/* State of bidirectional transfer loop. */
-struct bidirectional_transfer_state {
-	/* Direction from program to git. */
-	struct unidirectional_transfer ptg;
-	/* Direction from git to program. */
-	struct unidirectional_transfer gtp;
-};
-
-static void *udt_copy_task_routine(void *udt)
-{
-	struct unidirectional_transfer *t = (struct unidirectional_transfer *)udt;
-	while (t->state != SSTATE_FINISHED) {
-		if (STATE_NEEDS_READING(t->state))
-			if (udt_do_read(t))
-				return NULL;
-		if (STATE_NEEDS_WRITING(t->state))
-			if (udt_do_write(t))
-				return NULL;
-		if (STATE_NEEDS_CLOSING(t->state))
-			udt_close_if_finished(t);
-	}
-	return udt;	/* Just some non-NULL value. */
-}
-
-#ifndef NO_PTHREADS
-
-/*
- * Join thread, with appropriate errors on failure. Name is name for the
- * thread (for error messages). Returns 0 on success, 1 on failure.
- */
-static int tloop_join(pthread_t thread, const char *name)
-{
-	int err;
-	void *tret;
-	err = pthread_join(thread, &tret);
-	if (!tret) {
-		error(_("%s thread failed"), name);
-		return 1;
-	}
-	if (err) {
-		error(_("%s thread failed to join: %s"), name, strerror(err));
-		return 1;
-	}
-	return 0;
-}
-
-/*
- * Spawn the transfer tasks and then wait for them. Returns 0 on success,
- * -1 on failure.
- */
-static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s)
-{
-	pthread_t gtp_thread;
-	pthread_t ptg_thread;
-	int err;
-	int ret = 0;
-	err = pthread_create(&gtp_thread, NULL, udt_copy_task_routine,
-		&s->gtp);
-	if (err)
-		die(_("can't start thread for copying data: %s"), strerror(err));
-	err = pthread_create(&ptg_thread, NULL, udt_copy_task_routine,
-		&s->ptg);
-	if (err)
-		die(_("can't start thread for copying data: %s"), strerror(err));
-
-	ret |= tloop_join(gtp_thread, "Git to program copy");
-	ret |= tloop_join(ptg_thread, "Program to git copy");
-	return ret;
-}
-#else
-
-/* Close the source and target (for writing) for transfer. */
-static void udt_kill_transfer(struct unidirectional_transfer *t)
-{
-	t->state = SSTATE_FINISHED;
-	/*
-	 * Socket read end left open isn't a disaster if nobody
-	 * attempts to read from it (mingw compat headers do not
-	 * have SHUT_RD)...
-	 *
-	 * We can't fully close the socket since otherwise gtp
-	 * task would first close the socket it sends data to
-	 * while closing the ptg file descriptors.
-	 */
-	if (!t->src_is_sock)
-		close(t->src);
-	if (t->dest_is_sock)
-		shutdown(t->dest, SHUT_WR);
-	else
-		close(t->dest);
-}
-
-/*
- * Join process, with appropriate errors on failure. Name is name for the
- * process (for error messages). Returns 0 on success, 1 on failure.
- */
-static int tloop_join(pid_t pid, const char *name)
-{
-	int tret;
-	if (waitpid(pid, &tret, 0) < 0) {
-		error_errno(_("%s process failed to wait"), name);
-		return 1;
-	}
-	if (!WIFEXITED(tret) || WEXITSTATUS(tret)) {
-		error(_("%s process failed"), name);
-		return 1;
-	}
-	return 0;
-}
-
-/*
- * Spawn the transfer tasks and then wait for them. Returns 0 on success,
- * -1 on failure.
- */
-static int tloop_spawnwait_tasks(struct bidirectional_transfer_state *s)
-{
-	pid_t pid1, pid2;
-	int ret = 0;
-
-	/* Fork thread #1: git to program. */
-	pid1 = fork();
-	if (pid1 < 0)
-		die_errno(_("can't start thread for copying data"));
-	else if (pid1 == 0) {
-		udt_kill_transfer(&s->ptg);
-		exit(udt_copy_task_routine(&s->gtp) ? 0 : 1);
-	}
-
-	/* Fork thread #2: program to git. */
-	pid2 = fork();
-	if (pid2 < 0)
-		die_errno(_("can't start thread for copying data"));
-	else if (pid2 == 0) {
-		udt_kill_transfer(&s->gtp);
-		exit(udt_copy_task_routine(&s->ptg) ? 0 : 1);
-	}
-
-	/*
-	 * Close both streams in parent as to not interfere with
-	 * end of file detection and wait for both tasks to finish.
-	 */
-	udt_kill_transfer(&s->gtp);
-	udt_kill_transfer(&s->ptg);
-	ret |= tloop_join(pid1, "Git to program copy");
-	ret |= tloop_join(pid2, "Program to git copy");
-	return ret;
-}
-#endif
-
-/*
- * Copies data from stdin to output and from input to stdout simultaneously.
- * Additionally filtering through given filter. If filter is NULL, uses
- * identity filter.
- */
-int bidirectional_transfer_loop(int input, int output)
-{
-	struct bidirectional_transfer_state state;
-
-	/* Fill the state fields. */
-	state.ptg.src = input;
-	state.ptg.dest = 1;
-	state.ptg.src_is_sock = (input == output);
-	state.ptg.dest_is_sock = 0;
-	state.ptg.state = SSTATE_TRANSFERRING;
-	state.ptg.bufuse = 0;
-	state.ptg.src_name = "remote input";
-	state.ptg.dest_name = "stdout";
-
-	state.gtp.src = 0;
-	state.gtp.dest = output;
-	state.gtp.src_is_sock = 0;
-	state.gtp.dest_is_sock = (input == output);
-	state.gtp.state = SSTATE_TRANSFERRING;
-	state.gtp.bufuse = 0;
-	state.gtp.src_name = "stdin";
-	state.gtp.dest_name = "remote output";
-
-	return tloop_spawnwait_tasks(&state);
-}
-
-void reject_atomic_push(struct ref *remote_refs, int mirror_mode)
-{
-	struct ref *ref;
-
-	/* Mark other refs as failed */
-	for (ref = remote_refs; ref; ref = ref->next) {
-		if (!ref->peer_ref && !mirror_mode)
-			continue;
-
-		switch (ref->status) {
-		case REF_STATUS_NONE:
-		case REF_STATUS_OK:
-		case REF_STATUS_EXPECTING_REPORT:
-			ref->status = REF_STATUS_ATOMIC_PUSH_FAILED;
-			continue;
-		default:
-			break; /* do nothing */
-		}
-	}
-	return;
-}