teach send-pack about --[no-]progress

The send_pack function gets a "progress" flag saying "yes,
definitely show progress" or "no, definitely do not show
progress". This gets set properly by transport_push when
send_pack is called directly.

However, when the send-pack command is executed separately
(as it is for the remote-curl helper), there is no way to
tell it "definitely do this". As a result, we do not
properly respect "git push --no-progress" for smart-http
remotes; you will still get progress if stderr is a tty.

This patch teaches send-pack --progress and --no-progress,
and teaches remote-curl to pass the appropriate option to
override send-pack's isatty check. This fixes the
--no-progress case above, and as a bonus, also makes "git
push --progress" work when stderr is not a tty.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin/send-pack.c

@@ -410,6 +410,7 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
 	const char *receivepack = "git-receive-pack";
 	int flags;
 	int nonfastforward = 0;
+	int progress = -1;
 
 	argv++;
 	for (i = 1; i < argc; i++, argv++) {
@@ -452,6 +453,14 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
 				args.verbose = 1;
 				continue;
 			}
+			if (!strcmp(arg, "--progress")) {
+				progress = 1;
+				continue;
+			}
+			if (!strcmp(arg, "--no-progress")) {
+				progress = 0;
+				continue;
+			}
 			if (!strcmp(arg, "--thin")) {
 				args.use_thin_pack = 1;
 				continue;
@@ -492,8 +501,9 @@ int cmd_send_pack(int argc, const char **argv, const char *prefix)
 		}
 	}
 
-	if (!args.quiet)
-		args.progress = isatty(2);
+	if (progress == -1)
+		progress = !args.quiet && isatty(2);
+	args.progress = progress;
 
 	if (args.stateless_rpc) {
 		conn = NULL;

remote-curl.c

@@ -774,6 +774,7 @@ static int push_git(struct discovery *heads, int nr_spec, char **specs)
 		argv[argc++] = "--quiet";
 	else if (options.verbosity > 1)
 		argv[argc++] = "--verbose";
+	argv[argc++] = options.progress ? "--progress" : "--no-progress";
 	argv[argc++] = url;
 	for (i = 0; i < nr_spec; i++)
 		argv[argc++] = specs[i];