1 files changed, 258 insertions, 171 deletions

diff --git a/remote-curl.c b/remote-curl.c
index 9a8b123507..52c2d96ce6 100644
--- a/remote-curl.c
+++ b/remote-curl.c
@@ -6,20 +6,29 @@
 #include "exec_cmd.h"
 #include "run-command.h"
 #include "pkt-line.h"
+#include "string-list.h"
 #include "sideband.h"
+#include "argv-array.h"
+#include "credential.h"
+#include "sha1-array.h"
 
 static struct remote *remote;
-static const char *url; /* always ends with a trailing slash */
+/* always ends with a trailing slash */
+static struct strbuf url = STRBUF_INIT;
 
 struct options {
 	int verbosity;
 	unsigned long depth;
 	unsigned progress : 1,
+		check_self_contained_and_connected : 1,
+		cloning : 1,
+		update_shallow : 1,
 		followtags : 1,
 		dry_run : 1,
 		thin : 1;
 };
 static struct options options;
+static struct string_list cas_options = STRING_LIST_INIT_DUP;
 
 static int set_option(const char *name, const char *value)
 {
@@ -66,7 +75,38 @@ static int set_option(const char *name, const char *value)
 			return -1;
 		return 0;
 	}
-	else {
+	else if (!strcmp(name, "check-connectivity")) {
+		if (!strcmp(value, "true"))
+			options.check_self_contained_and_connected = 1;
+		else if (!strcmp(value, "false"))
+			options.check_self_contained_and_connected = 0;
+		else
+			return -1;
+		return 0;
+	}
+	else if (!strcmp(name, "cas")) {
+		struct strbuf val = STRBUF_INIT;
+		strbuf_addf(&val, "--" CAS_OPT_NAME "=%s", value);
+		string_list_append(&cas_options, val.buf);
+		strbuf_release(&val);
+		return 0;
+	} else if (!strcmp(name, "cloning")) {
+		if (!strcmp(value, "true"))
+			options.cloning = 1;
+		else if (!strcmp(value, "false"))
+			options.cloning = 0;
+		else
+			return -1;
+		return 0;
+	} else if (!strcmp(name, "update-shallow")) {
+		if (!strcmp(value, "true"))
+			options.update_shallow = 1;
+		else if (!strcmp(value, "false"))
+			options.update_shallow = 0;
+		else
+			return -1;
+		return 0;
+	} else {
 		return 1 /* unsupported */;
 	}
 }
@@ -76,55 +116,157 @@ struct discovery {
 	char *buf_alloc;
 	char *buf;
 	size_t len;
+	struct ref *refs;
+	struct sha1_array shallow;
 	unsigned proto_git : 1;
 };
 static struct discovery *last_discovery;
 
+static struct ref *parse_git_refs(struct discovery *heads, int for_push)
+{
+	struct ref *list = NULL;
+	get_remote_heads(-1, heads->buf, heads->len, &list,
+			 for_push ? REF_NORMAL : 0, NULL, &heads->shallow);
+	return list;
+}
+
+static struct ref *parse_info_refs(struct discovery *heads)
+{
+	char *data, *start, *mid;
+	char *ref_name;
+	int i = 0;
+
+	struct ref *refs = NULL;
+	struct ref *ref = NULL;
+	struct ref *last_ref = NULL;
+
+	data = heads->buf;
+	start = NULL;
+	mid = data;
+	while (i < heads->len) {
+		if (!start) {
+			start = &data[i];
+		}
+		if (data[i] == '\t')
+			mid = &data[i];
+		if (data[i] == '\n') {
+			if (mid - start != 40)
+				die("%sinfo/refs not valid: is this a git repository?",
+				    url.buf);
+			data[i] = 0;
+			ref_name = mid + 1;
+			ref = xmalloc(sizeof(struct ref) +
+				      strlen(ref_name) + 1);
+			memset(ref, 0, sizeof(struct ref));
+			strcpy(ref->name, ref_name);
+			get_sha1_hex(start, ref->old_sha1);
+			if (!refs)
+				refs = ref;
+			if (last_ref)
+				last_ref->next = ref;
+			last_ref = ref;
+			start = NULL;
+		}
+		i++;
+	}
+
+	ref = alloc_ref("HEAD");
+	if (!http_fetch_ref(url.buf, ref) &&
+	    !resolve_remote_symref(ref, refs)) {
+		ref->next = refs;
+		refs = ref;
+	} else {
+		free(ref);
+	}
+
+	return refs;
+}
+
 static void free_discovery(struct discovery *d)
 {
 	if (d) {
 		if (d == last_discovery)
 			last_discovery = NULL;
+		free(d->shallow.sha1);
 		free(d->buf_alloc);
+		free_refs(d->refs);
 		free(d);
 	}
 }
 
-static struct discovery* discover_refs(const char *service)
+static int show_http_message(struct strbuf *type, struct strbuf *msg)
 {
+	const char *p, *eol;
+
+	/*
+	 * We only show text/plain parts, as other types are likely
+	 * to be ugly to look at on the user's terminal.
+	 *
+	 * TODO should handle "; charset=XXX", and re-encode into
+	 * logoutputencoding
+	 */
+	if (strcasecmp(type->buf, "text/plain"))
+		return -1;
+
+	strbuf_trim(msg);
+	if (!msg->len)
+		return -1;
+
+	p = msg->buf;
+	do {
+		eol = strchrnul(p, '\n');
+		fprintf(stderr, "remote: %.*s\n", (int)(eol - p), p);
+		p = eol + 1;
+	} while(*eol);
+	return 0;
+}
+
+static struct discovery* discover_refs(const char *service, int for_push)
+{
+	struct strbuf exp = STRBUF_INIT;
+	struct strbuf type = STRBUF_INIT;
 	struct strbuf buffer = STRBUF_INIT;
+	struct strbuf refs_url = STRBUF_INIT;
+	struct strbuf effective_url = STRBUF_INIT;
 	struct discovery *last = last_discovery;
-	char *refs_url;
 	int http_ret, maybe_smart = 0;
+	struct http_get_options options;
 
 	if (last && !strcmp(service, last->service))
 		return last;
 	free_discovery(last);
 
-	strbuf_addf(&buffer, "%sinfo/refs", url);
-	if ((!prefixcmp(url, "http://") || !prefixcmp(url, "https://")) &&
+	strbuf_addf(&refs_url, "%sinfo/refs", url.buf);
+	if ((starts_with(url.buf, "http://") || starts_with(url.buf, "https://")) &&
 	     git_env_bool("GIT_SMART_HTTP", 1)) {
 		maybe_smart = 1;
-		if (!strchr(url, '?'))
-			strbuf_addch(&buffer, '?');
+		if (!strchr(url.buf, '?'))
+			strbuf_addch(&refs_url, '?');
 		else
-			strbuf_addch(&buffer, '&');
-		strbuf_addf(&buffer, "service=%s", service);
+			strbuf_addch(&refs_url, '&');
+		strbuf_addf(&refs_url, "service=%s", service);
 	}
-	refs_url = strbuf_detach(&buffer, NULL);
 
-	http_ret = http_get_strbuf(refs_url, &buffer, HTTP_NO_CACHE);
+	memset(&options, 0, sizeof(options));
+	options.content_type = &type;
+	options.effective_url = &effective_url;
+	options.base_url = &url;
+	options.no_cache = 1;
+	options.keep_error = 1;
+
+	http_ret = http_get_strbuf(refs_url.buf, &buffer, &options);
 	switch (http_ret) {
 	case HTTP_OK:
 		break;
 	case HTTP_MISSING_TARGET:
-		die("%s not found: did you run git update-server-info on the"
-		    " server?", refs_url);
+		show_http_message(&type, &buffer);
+		die("repository '%s' not found", url.buf);
 	case HTTP_NOAUTH:
-		die("Authentication failed");
+		show_http_message(&type, &buffer);
+		die("Authentication failed for '%s'", url.buf);
 	default:
-		http_error(refs_url, http_ret);
-		die("HTTP request failed");
+		show_http_message(&type, &buffer);
+		die("unable to access '%s': %s", url.buf, curl_errorstr);
 	}
 
 	last= xcalloc(1, sizeof(*last_discovery));
@@ -132,132 +274,58 @@ static struct discovery* discover_refs(const char *service)
 	last->buf_alloc = strbuf_detach(&buffer, &last->len);
 	last->buf = last->buf_alloc;
 
-	if (maybe_smart && 5 <= last->len && last->buf[4] == '#') {
-		/* smart HTTP response; validate that the service
+	strbuf_addf(&exp, "application/x-%s-advertisement", service);
+	if (maybe_smart &&
+	    (5 <= last->len && last->buf[4] == '#') &&
+	    !strbuf_cmp(&exp, &type)) {
+		char *line;
+
+		/*
+		 * smart HTTP response; validate that the service
 		 * pkt-line matches our request.
 		 */
-		struct strbuf exp = STRBUF_INIT;
-
-		if (packet_get_line(&buffer, &last->buf, &last->len) <= 0)
-			die("%s has invalid packet header", refs_url);
-		if (buffer.len && buffer.buf[buffer.len - 1] == '\n')
-			strbuf_setlen(&buffer, buffer.len - 1);
+		line = packet_read_line_buf(&last->buf, &last->len, NULL);
 
+		strbuf_reset(&exp);
 		strbuf_addf(&exp, "# service=%s", service);
-		if (strbuf_cmp(&exp, &buffer))
-			die("invalid server response; got '%s'", buffer.buf);
+		if (strcmp(line, exp.buf))
+			die("invalid server response; got '%s'", line);
 		strbuf_release(&exp);
 
 		/* The header can include additional metadata lines, up
 		 * until a packet flush marker.  Ignore these now, but
 		 * in the future we might start to scan them.
 		 */
-		strbuf_reset(&buffer);
-		while (packet_get_line(&buffer, &last->buf, &last->len) > 0)
-			strbuf_reset(&buffer);
+		while (packet_read_line_buf(&last->buf, &last->len, NULL))
+			;
 
 		last->proto_git = 1;
 	}
 
-	free(refs_url);
+	if (last->proto_git)
+		last->refs = parse_git_refs(last, for_push);
+	else
+		last->refs = parse_info_refs(last);
+
+	strbuf_release(&refs_url);
+	strbuf_release(&exp);
+	strbuf_release(&type);
+	strbuf_release(&effective_url);
 	strbuf_release(&buffer);
 	last_discovery = last;
 	return last;
 }
 
-static int write_discovery(int in, int out, void *data)
-{
-	struct discovery *heads = data;
-	int err = 0;
-	if (write_in_full(out, heads->buf, heads->len) != heads->len)
-		err = 1;
-	close(out);
-	return err;
-}
-
-static struct ref *parse_git_refs(struct discovery *heads, int for_push)
-{
-	struct ref *list = NULL;
-	struct async async;
-
-	memset(&async, 0, sizeof(async));
-	async.proc = write_discovery;
-	async.data = heads;
-	async.out = -1;
-
-	if (start_async(&async))
-		die("cannot start thread to parse advertised refs");
-	get_remote_heads(async.out, &list,
-			for_push ? REF_NORMAL : 0, NULL);
-	close(async.out);
-	if (finish_async(&async))
-		die("ref parsing thread failed");
-	return list;
-}
-
-static struct ref *parse_info_refs(struct discovery *heads)
-{
-	char *data, *start, *mid;
-	char *ref_name;
-	int i = 0;
-
-	struct ref *refs = NULL;
-	struct ref *ref = NULL;
-	struct ref *last_ref = NULL;
-
-	data = heads->buf;
-	start = NULL;
-	mid = data;
-	while (i < heads->len) {
-		if (!start) {
-			start = &data[i];
-		}
-		if (data[i] == '\t')
-			mid = &data[i];
-		if (data[i] == '\n') {
-			if (mid - start != 40)
-				die("%sinfo/refs not valid: is this a git repository?", url);
-			data[i] = 0;
-			ref_name = mid + 1;
-			ref = xmalloc(sizeof(struct ref) +
-				      strlen(ref_name) + 1);
-			memset(ref, 0, sizeof(struct ref));
-			strcpy(ref->name, ref_name);
-			get_sha1_hex(start, ref->old_sha1);
-			if (!refs)
-				refs = ref;
-			if (last_ref)
-				last_ref->next = ref;
-			last_ref = ref;
-			start = NULL;
-		}
-		i++;
-	}
-
-	ref = alloc_ref("HEAD");
-	if (!http_fetch_ref(url, ref) &&
-	    !resolve_remote_symref(ref, refs)) {
-		ref->next = refs;
-		refs = ref;
-	} else {
-		free(ref);
-	}
-
-	return refs;
-}
-
 static struct ref *get_refs(int for_push)
 {
 	struct discovery *heads;
 
 	if (for_push)
-		heads = discover_refs("git-receive-pack");
+		heads = discover_refs("git-receive-pack", for_push);
 	else
-		heads = discover_refs("git-upload-pack");
+		heads = discover_refs("git-upload-pack", for_push);
 
-	if (heads->proto_git)
-		return parse_git_refs(heads, for_push);
-	return parse_info_refs(heads);
+	return heads->refs;
 }
 
 static void output_refs(struct ref *refs)
@@ -271,7 +339,6 @@ static void output_refs(struct ref *refs)
 	}
 	printf("\n");
 	fflush(stdout);
-	free_refs(refs);
 }
 
 struct rpc_state {
@@ -301,7 +368,7 @@ static size_t rpc_out(void *ptr, size_t eltsize,
 
 	if (!avail) {
 		rpc->initial_buffer = 0;
-		avail = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
+		avail = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 		if (!avail)
 			return 0;
 		rpc->pos = 0;
@@ -347,25 +414,26 @@ static size_t rpc_in(char *ptr, size_t eltsize,
 	return size;
 }
 
-static int run_slot(struct active_request_slot *slot)
+static int run_slot(struct active_request_slot *slot,
+		    struct slot_results *results)
 {
 	int err;
-	struct slot_results results;
+	struct slot_results results_buf;
 
-	slot->results = &results;
-	slot->curl_result = curl_easy_perform(slot->curl);
-	finish_active_slot(slot);
+	if (!results)
+		results = &results_buf;
+
+	err = run_one_slot(slot, results);
 
-	err = handle_curl_result(&results);
 	if (err != HTTP_OK && err != HTTP_REAUTH) {
 		error("RPC failed; result=%d, HTTP code = %ld",
-		      results.curl_result, results.http_code);
+		      results->curl_result, results->http_code);
 	}
 
 	return err;
 }
 
-static int probe_rpc(struct rpc_state *rpc)
+static int probe_rpc(struct rpc_state *rpc, struct slot_results *results)
 {
 	struct active_request_slot *slot;
 	struct curl_slist *headers = NULL;
@@ -387,7 +455,7 @@ static int probe_rpc(struct rpc_state *rpc)
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, fwrite_buffer);
 	curl_easy_setopt(slot->curl, CURLOPT_FILE, &buf);
 
-	err = run_slot(slot);
+	err = run_slot(slot, results);
 
 	curl_slist_free_all(headers);
 	strbuf_release(&buf);
@@ -402,6 +470,7 @@ static int post_rpc(struct rpc_state *rpc)
 	char *gzip_body = NULL;
 	size_t gzip_size = 0;
 	int err, large_request = 0;
+	int needs_100_continue = 0;
 
 	/* Try to load the entire request, if we can fit it into the
 	 * allocated buffer space we can use HTTP/1.0 and avoid the
@@ -418,23 +487,31 @@ static int post_rpc(struct rpc_state *rpc)
 			break;
 		}
 
-		n = packet_read_line(rpc->out, buf, left);
+		n = packet_read(rpc->out, NULL, NULL, buf, left, 0);
 		if (!n)
 			break;
 		rpc->len += n;
 	}
 
 	if (large_request) {
+		struct slot_results results;
+
 		do {
-			err = probe_rpc(rpc);
+			err = probe_rpc(rpc, &results);
+			if (err == HTTP_REAUTH)
+				credential_fill(&http_auth);
 		} while (err == HTTP_REAUTH);
 		if (err != HTTP_OK)
 			return -1;
+
+		if (results.auth_avail & CURLAUTH_GSSNEGOTIATE)
+			needs_100_continue = 1;
 	}
 
 	headers = curl_slist_append(headers, rpc->hdr_content_type);
 	headers = curl_slist_append(headers, rpc->hdr_accept);
-	headers = curl_slist_append(headers, "Expect:");
+	headers = curl_slist_append(headers, needs_100_continue ?
+		"Expect: 100-continue" : "Expect:");
 
 retry:
 	slot = get_active_slot();
@@ -525,9 +602,11 @@ retry:
 	curl_easy_setopt(slot->curl, CURLOPT_WRITEFUNCTION, rpc_in);
 	curl_easy_setopt(slot->curl, CURLOPT_FILE, rpc);
 
-	err = run_slot(slot);
-	if (err == HTTP_REAUTH && !large_request)
+	err = run_slot(slot, NULL);
+	if (err == HTTP_REAUTH && !large_request) {
+		credential_fill(&http_auth);
 		goto retry;
+	}
 	if (err != HTTP_OK)
 		err = -1;
 
@@ -562,7 +641,7 @@ static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 	rpc->out = client.out;
 	strbuf_init(&rpc->result, 0);
 
-	strbuf_addf(&buf, "%s%s", url, svc);
+	strbuf_addf(&buf, "%s%s", url.buf, svc);
 	rpc->service_url = strbuf_detach(&buf, NULL);
 
 	strbuf_addf(&buf, "Content-Type: application/x-%s-request", svc);
@@ -572,7 +651,7 @@ static int rpc_service(struct rpc_state *rpc, struct discovery *heads)
 	rpc->hdr_accept = strbuf_detach(&buf, NULL);
 
 	while (!err) {
-		int n = packet_read_line(rpc->out, rpc->buf, rpc->alloc);
+		int n = packet_read(rpc->out, NULL, NULL, rpc->buf, rpc->alloc, 0);
 		if (!n)
 			break;
 		rpc->pos = 0;
@@ -614,7 +693,7 @@ static int fetch_dumb(int nr_heads, struct ref **to_fetch)
 	for (i = 0; i < nr_heads; i++)
 		targets[i] = xstrdup(sha1_to_hex(to_fetch[i]->old_sha1));
 
-	walker = get_http_walker(url);
+	walker = get_http_walker(url.buf);
 	walker->get_all = 1;
 	walker->get_tree = 1;
 	walker->get_history = 1;
@@ -637,7 +716,7 @@ static int fetch_git(struct discovery *heads,
 	struct strbuf preamble = STRBUF_INIT;
 	char *depth_arg = NULL;
 	int argc = 0, i, err;
-	const char *argv[15];
+	const char *argv[17];
 
 	argv[argc++] = "fetch-pack";
 	argv[argc++] = "--stateless-rpc";
@@ -651,6 +730,12 @@ static int fetch_git(struct discovery *heads,
 		argv[argc++] = "-v";
 		argv[argc++] = "-v";
 	}
+	if (options.check_self_contained_and_connected)
+		argv[argc++] = "--check-self-contained-and-connected";
+	if (options.cloning)
+		argv[argc++] = "--cloning";
+	if (options.update_shallow)
+		argv[argc++] = "--update-shallow";
 	if (!options.progress)
 		argv[argc++] = "--no-progress";
 	if (options.depth) {
@@ -659,14 +744,15 @@ static int fetch_git(struct discovery *heads,
 		depth_arg = strbuf_detach(&buf, NULL);
 		argv[argc++] = depth_arg;
 	}
-	argv[argc++] = url;
+	argv[argc++] = url.buf;
 	argv[argc++] = NULL;
 
 	for (i = 0; i < nr_heads; i++) {
 		struct ref *ref = to_fetch[i];
 		if (!ref->name || !*ref->name)
 			die("cannot fetch by sha1 over smart http");
-		packet_buf_write(&preamble, "%s\n", ref->name);
+		packet_buf_write(&preamble, "%s %s\n",
+				 sha1_to_hex(ref->old_sha1), ref->name);
 	}
 	packet_buf_flush(&preamble);
 
@@ -678,7 +764,7 @@ static int fetch_git(struct discovery *heads,
 
 	err = rpc_service(&rpc, heads);
 	if (rpc.result.len)
-		safe_write(1, rpc.result.buf, rpc.result.len);
+		write_or_die(1, rpc.result.buf, rpc.result.len);
 	strbuf_release(&rpc.result);
 	strbuf_release(&preamble);
 	free(depth_arg);
@@ -687,7 +773,7 @@ static int fetch_git(struct discovery *heads,
 
 static int fetch(int nr_heads, struct ref **to_fetch)
 {
-	struct discovery *d = discover_refs("git-upload-pack");
+	struct discovery *d = discover_refs("git-upload-pack", 0);
 	if (d->proto_git)
 		return fetch_git(d, nr_heads, to_fetch);
 	else
@@ -702,7 +788,7 @@ static void parse_fetch(struct strbuf *buf)
 	int alloc_heads = 0, nr_heads = 0;
 
 	do {
-		if (!prefixcmp(buf->buf, "fetch ")) {
+		if (starts_with(buf->buf, "fetch ")) {
 			char *p = buf->buf + strlen("fetch ");
 			char *name;
 			struct ref *ref;
@@ -757,7 +843,7 @@ static int push_dav(int nr_spec, char **specs)
 		argv[argc++] = "--dry-run";
 	if (options.verbosity > 1)
 		argv[argc++] = "--verbose";
-	argv[argc++] = url;
+	argv[argc++] = url.buf;
 	for (i = 0; i < nr_spec; i++)
 		argv[argc++] = specs[i];
 	argv[argc++] = NULL;
@@ -771,42 +857,44 @@ static int push_dav(int nr_spec, char **specs)
 static int push_git(struct discovery *heads, int nr_spec, char **specs)
 {
 	struct rpc_state rpc;
-	const char **argv;
-	int argc = 0, i, err;
+	int i, err;
+	struct argv_array args;
+	struct string_list_item *cas_option;
+
+	argv_array_init(&args);
+	argv_array_pushl(&args, "send-pack", "--stateless-rpc", "--helper-status",
+			 NULL);
 
-	argv = xmalloc((10 + nr_spec) * sizeof(char*));
-	argv[argc++] = "send-pack";
-	argv[argc++] = "--stateless-rpc";
-	argv[argc++] = "--helper-status";
 	if (options.thin)
-		argv[argc++] = "--thin";
+		argv_array_push(&args, "--thin");
 	if (options.dry_run)
-		argv[argc++] = "--dry-run";
+		argv_array_push(&args, "--dry-run");
 	if (options.verbosity == 0)
-		argv[argc++] = "--quiet";
+		argv_array_push(&args, "--quiet");
 	else if (options.verbosity > 1)
-		argv[argc++] = "--verbose";
-	argv[argc++] = options.progress ? "--progress" : "--no-progress";
-	argv[argc++] = url;
+		argv_array_push(&args, "--verbose");
+	argv_array_push(&args, options.progress ? "--progress" : "--no-progress");
+	for_each_string_list_item(cas_option, &cas_options)
+		argv_array_push(&args, cas_option->string);
+	argv_array_push(&args, url.buf);
 	for (i = 0; i < nr_spec; i++)
-		argv[argc++] = specs[i];
-	argv[argc++] = NULL;
+		argv_array_push(&args, specs[i]);
 
 	memset(&rpc, 0, sizeof(rpc));
 	rpc.service_name = "git-receive-pack",
-	rpc.argv = argv;
+	rpc.argv = args.argv;
 
 	err = rpc_service(&rpc, heads);
 	if (rpc.result.len)
-		safe_write(1, rpc.result.buf, rpc.result.len);
+		write_or_die(1, rpc.result.buf, rpc.result.len);
 	strbuf_release(&rpc.result);
-	free(argv);
+	argv_array_clear(&args);
 	return err;
 }
 
 static int push(int nr_spec, char **specs)
 {
-	struct discovery *heads = discover_refs("git-receive-pack");
+	struct discovery *heads = discover_refs("git-receive-pack", 1);
 	int ret;
 
 	if (heads->proto_git)
@@ -823,7 +911,7 @@ static void parse_push(struct strbuf *buf)
 	int alloc_spec = 0, nr_spec = 0, i, ret;
 
 	do {
-		if (!prefixcmp(buf->buf, "push ")) {
+		if (starts_with(buf->buf, "push ")) {
 			ALLOC_GROW(specs, nr_spec + 1, alloc_spec);
 			specs[nr_spec++] = xstrdup(buf->buf + 5);
 		}
@@ -869,14 +957,12 @@ int main(int argc, const char **argv)
 	remote = remote_get(argv[1]);
 
 	if (argc > 2) {
-		end_url_with_slash(&buf, argv[2]);
+		end_url_with_slash(&url, argv[2]);
 	} else {
-		end_url_with_slash(&buf, remote->url[0]);
+		end_url_with_slash(&url, remote->url[0]);
 	}
 
-	url = strbuf_detach(&buf, NULL);
-
-	http_init(remote, url, 0);
+	http_init(remote, url.buf, 0);
 
 	do {
 		if (strbuf_getline(&buf, stdin, '\n') == EOF) {
@@ -888,19 +974,19 @@ int main(int argc, const char **argv)
 		}
 		if (buf.len == 0)
 			break;
-		if (!prefixcmp(buf.buf, "fetch ")) {
+		if (starts_with(buf.buf, "fetch ")) {
 			if (nongit)
 				die("Fetch attempted without a local repo");
 			parse_fetch(&buf);
 
-		} else if (!strcmp(buf.buf, "list") || !prefixcmp(buf.buf, "list ")) {
+		} else if (!strcmp(buf.buf, "list") || starts_with(buf.buf, "list ")) {
 			int for_push = !!strstr(buf.buf + 4, "for-push");
 			output_refs(get_refs(for_push));
 
-		} else if (!prefixcmp(buf.buf, "push ")) {
+		} else if (starts_with(buf.buf, "push ")) {
 			parse_push(&buf);
 
-		} else if (!prefixcmp(buf.buf, "option ")) {
+		} else if (starts_with(buf.buf, "option ")) {
 			char *name = buf.buf + strlen("option ");
 			char *value = strchr(name, ' ');
 			int result;
@@ -923,6 +1009,7 @@ int main(int argc, const char **argv)
 			printf("fetch\n");
 			printf("option\n");
 			printf("push\n");
+			printf("check-connectivity\n");
 			printf("\n");
 			fflush(stdout);
 		} else {