From 64aea34d06f71828b0bdd6ae177b9bcf22d752b4 Mon Sep 17 00:00:00 2001
From: Eric Wong <e@80x24.org>
Date: Tue, 24 May 2016 03:41:53 +0000
Subject: git-http-backend: use qspawn to limit running processes

Having an excessive amount of git-pack-objects processes is
dangerous to the health of the server.  Queue up process spawning
for long-running responses and serve them sequentially, instead.
---
 t/qspawn.t | 60 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 60 insertions(+)
 create mode 100644 t/qspawn.t

(limited to 't')

diff --git a/t/qspawn.t b/t/qspawn.t
new file mode 100644
index 00000000..05072e24
--- /dev/null
+++ b/t/qspawn.t
@@ -0,0 +1,60 @@
+# Copyright (C) 2016 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+use Test::More;
+use_ok 'PublicInbox::Qspawn';
+{
+	my $x = PublicInbox::Qspawn->new([qw(true)]);
+	my $run = 0;
+	$x->start(sub {
+		my ($rpipe) = @_;
+		is(0, sysread($rpipe, my $buf, 1), 'read zero bytes');
+		ok(!$x->finish, 'no error on finish');
+		$run = 1;
+	});
+	is($run, 1, 'callback ran alright');
+}
+
+{
+	my $x = PublicInbox::Qspawn->new([qw(false)]);
+	my $run = 0;
+	$x->start(sub {
+		my ($rpipe) = @_;
+		is(0, sysread($rpipe, my $buf, 1), 'read zero bytes from false');
+		my $err = $x->finish;
+		is($err, 256, 'error on finish');
+		$run = 1;
+	});
+	is($run, 1, 'callback ran alright');
+}
+
+foreach my $cmd ([qw(sleep 1)], [qw(sh -c), 'sleep 1; false']) {
+	my $s = PublicInbox::Qspawn->new($cmd);
+	my @run;
+	$s->start(sub {
+		my ($rpipe) = @_;
+		push @run, 'sleep';
+		is(0, sysread($rpipe, my $buf, 1), 'read zero bytes');
+	});
+	my $n = 0;
+	my @t = map {
+		my $i = $n++;
+		my $x = PublicInbox::Qspawn->new([qw(true)]);
+		$x->start(sub {
+			my ($rpipe) = @_;
+			push @run, $i;
+		});
+		[$x, $i]
+	} (0..2);
+
+	if ($cmd->[-1] =~ /false\z/) {
+		ok($s->finish, 'got error on false after sleep');
+	} else {
+		ok(!$s->finish, 'no error on sleep');
+	}
+	ok(!$_->[0]->finish, "true $_->[1] succeeded") foreach @t;
+	is_deeply([qw(sleep 0 1 2)], \@run, 'ran in order');
+}
+
+done_testing();
+
+1;
-- 
cgit v1.2.3-24-ge0c7