upload-pack: actually use some upload_pack_data bitfields

As we cleanup 'upload-pack.c' by using 'struct upload_pack_data'
more thoroughly, let's actually start using some bitfields of
that struct, which were previously unused.

We could instead have just removed the following bitfields
from the struct:

unsigned use_thin_pack : 1;
unsigned use_ofs_delta : 1;
unsigned no_progress : 1;
unsigned use_include_tag : 1;

but using them makes it possible to remove a number of static
variables with the same name and purpose from 'upload-pack.c'.

This is a behavior change, as we accidentally used to let values
in those bitfields propagate from one v2 "fetch" command to
another for ssh/git/file connections (but not for http). That's
fixing a bug, but one nobody is likely to see, because it would
imply the client sending different capabilities for each request.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Christian Couder <chriscool@tuxfamily.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

upload-pack.c

@@ -46,8 +46,7 @@ static timestamp_t oldest_have;
 
 static int multi_ack;
 static int no_done;
-static int use_thin_pack, use_ofs_delta, use_include_tag;
-static int no_progress, daemon_mode;
+static int daemon_mode;
 /* Allow specifying sha1 if it is a ref tip. */
 #define ALLOW_TIP_SHA1	01
 /* Allow request of a sha1 if it is reachable from a ref (possibly hidden ref). */
@@ -186,17 +185,17 @@ static void create_pack_file(struct upload_pack_data *pack_data)
 	}
 	argv_array_push(&pack_objects.args, "pack-objects");
 	argv_array_push(&pack_objects.args, "--revs");
-	if (use_thin_pack)
+	if (pack_data->use_thin_pack)
 		argv_array_push(&pack_objects.args, "--thin");
 
 	argv_array_push(&pack_objects.args, "--stdout");
 	if (shallow_nr)
 		argv_array_push(&pack_objects.args, "--shallow");
-	if (!no_progress)
+	if (!pack_data->no_progress)
 		argv_array_push(&pack_objects.args, "--progress");
-	if (use_ofs_delta)
+	if (pack_data->use_ofs_delta)
 		argv_array_push(&pack_objects.args, "--delta-base-offset");
-	if (use_include_tag)
+	if (pack_data->use_include_tag)
 		argv_array_push(&pack_objects.args, "--include-tag");
 	if (pack_data->filter_options.choice) {
 		const char *spec =
@@ -955,17 +954,17 @@ static void receive_needs(struct upload_pack_data *data,
 		if (parse_feature_request(features, "no-done"))
 			no_done = 1;
 		if (parse_feature_request(features, "thin-pack"))
-			use_thin_pack = 1;
+			data->use_thin_pack = 1;
 		if (parse_feature_request(features, "ofs-delta"))
-			use_ofs_delta = 1;
+			data->use_ofs_delta = 1;
 		if (parse_feature_request(features, "side-band-64k"))
 			use_sideband = LARGE_PACKET_MAX;
 		else if (parse_feature_request(features, "side-band"))
 			use_sideband = DEFAULT_PACKET_MAX;
 		if (parse_feature_request(features, "no-progress"))
-			no_progress = 1;
+			data->no_progress = 1;
 		if (parse_feature_request(features, "include-tag"))
-			use_include_tag = 1;
+			data->use_include_tag = 1;
 		if (allow_filter && parse_feature_request(features, "filter"))
 			filter_capability_requested = 1;
 
@@ -997,7 +996,7 @@ static void receive_needs(struct upload_pack_data *data,
 		check_non_tip(data);
 
 	if (!use_sideband && daemon_mode)
-		no_progress = 1;
+		data->no_progress = 1;
 
 	if (data->depth == 0 && !data->deepen_rev_list && data->shallows.nr == 0)
 		return;
@@ -1279,19 +1278,19 @@ static void process_args(struct packet_reader *request,
 
 		/* process args like thin-pack */
 		if (!strcmp(arg, "thin-pack")) {
-			use_thin_pack = 1;
+			data->use_thin_pack = 1;
 			continue;
 		}
 		if (!strcmp(arg, "ofs-delta")) {
-			use_ofs_delta = 1;
+			data->use_ofs_delta = 1;
 			continue;
 		}
 		if (!strcmp(arg, "no-progress")) {
-			no_progress = 1;
+			data->no_progress = 1;
 			continue;
 		}
 		if (!strcmp(arg, "include-tag")) {
-			use_include_tag = 1;
+			data->use_include_tag = 1;
 			continue;
 		}
 		if (!strcmp(arg, "done")) {