Improve vcregress.pl's handling of tap tests for client programs

The target is now named 'bincheck' rather than 'tapcheck' so that it
reflects what is checked instead of the test mechanism. Some of the
logic is improved, making it easier to add further sets of TAP based
tests in future. Also, the environment setting logic is imrpoved.

As discussed on -hackers a couple of months ago.

src/tools/msvc/vcregress.pl

@@ -34,7 +34,7 @@ if (-e "src/tools/msvc/buildenv.pl")
 
 my $what = shift || "";
 if ($what =~
-/^(check|installcheck|plcheck|contribcheck|modulescheck|ecpgcheck|isolationcheck|upgradecheck|tapcheck)$/i
+/^(check|installcheck|plcheck|contribcheck|modulescheck|ecpgcheck|isolationcheck|upgradecheck|bincheck)$/i
   )
 {
 	$what = uc $what;
@@ -61,7 +61,14 @@ unless ($schedule)
 	$schedule = "parallel" if ($what eq 'CHECK' || $what =~ /PARALLEL/);
 }
 
-$ENV{PERL5LIB} = "$topdir/src/tools/msvc;$ENV{PERL5LIB}";
+if ($ENV{PERL5LIB})
+{
+	$ENV{PERL5LIB} = "$topdir/src/tools/msvc;$ENV{PERL5LIB}";
+}
+else
+{
+	$ENV{PERL5LIB} = "$topdir/src/tools/msvc";
+}
 
 my $maxconn = "";
 $maxconn = "--max_connections=$ENV{MAX_CONNECTIONS}"
@@ -81,7 +88,7 @@ my %command = (
 	CONTRIBCHECK   => \&contribcheck,
 	MODULESCHECK   => \&modulescheck,
 	ISOLATIONCHECK => \&isolationcheck,
-	TAPCHECK       => \&tapcheck,
+	BINCHECK       => \&bincheck,
 	UPGRADECHECK   => \&upgradecheck,);
 
 my $proc = $command{$what};
@@ -168,41 +175,43 @@ sub isolationcheck
 	exit $status if $status;
 }
 
-sub tapcheck
+sub tap_check
 {
-	InstallTemp();
+	die "Tap tests not enabled in configuration"
+	  unless $config->{tap_tests};
+
+	my $dir = shift;
+	chdir $dir;
 
 	my @args = ( "prove", "--verbose", "t/*.pl");
-	my $mstat = 0;
 
+	# adjust the environment for just this test
+	local %ENV = %ENV;
 	$ENV{PERL5LIB} = "$topdir/src/test/perl;$ENV{PERL5LIB}";
 	$ENV{PG_REGRESS} = "$topdir/$Config/pg_regress/pg_regress";
 
+	$ENV{TESTDIR} = "$dir";
+
+	system(@args);
+	my $status = $? >> 8;
+	return $status;
+}
+
+sub bincheck
+{
+	InstallTemp();
+
+	my $mstat = 0;
+
 	# Find out all the existing TAP tests by looking for t/ directories
 	# in the tree.
-	my $tap_dirs = [];
-	my @top_dir = ($topdir);
-	File::Find::find(
-		{   wanted => sub {
-				/^t\z/s
-				  && push(@$tap_dirs, $File::Find::name);
-			  }
-		},
-		@top_dir);
+	my @bin_dirs = glob("$topdir/src/bin/*");
 
 	# Process each test
-	foreach my $test_path (@$tap_dirs)
+	foreach my $dir (@$bin_dirs)
 	{
-		# Like on Unix "make check-world", don't run the SSL test suite
-		# automatically.
-		next if ($test_path =~ /\/src\/test\/ssl\//);
-
-		my $dir = dirname($test_path);
-		chdir $dir;
-		# Reset those values, they may have been changed by another test.
-		$ENV{TESTDIR} = "$dir";
-		system(@args);
-		my $status = $? >> 8;
+		next unless -d "$dir/t";
+		my $status = tap_check($dir);
 		$mstat ||= $status;
 	}
 	exit $mstat if $mstat;