Allow vcregress.pl to run an arbitrary TAP test set

Currently only provision for running the bin checks in a single step is
provided for. Now these tests can be run individually, as well as tests
in other locations (e.g. src.test/recover).

Also provide for suppressing unnecessary temp installs by setting the
NO_TEMP_INSTALL environment variable just as the Makefiles do.

Backpatch to 9.4.

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|bincheck|recoverycheck)$/i
+/^(check|installcheck|plcheck|contribcheck|modulescheck|ecpgcheck|isolationcheck|upgradecheck|bincheck|recoverycheck|taptest)$/i
   )
 {
 	$what = uc $what;
@@ -54,13 +54,6 @@ copy("$Config/dummy_seclabel/dummy_seclabel.dll", "src/test/regress");
 
 $ENV{PATH} = "$topdir/$Config/libpq;$ENV{PATH}";
 
-my $schedule = shift;
-unless ($schedule)
-{
-	$schedule = "serial";
-	$schedule = "parallel" if ($what eq 'CHECK' || $what =~ /PARALLEL/);
-}
-
 if ($ENV{PERL5LIB})
 {
 	$ENV{PERL5LIB} = "$topdir/src/tools/msvc;$ENV{PERL5LIB}";
@@ -90,13 +83,14 @@ my %command = (
 	ISOLATIONCHECK => \&isolationcheck,
 	BINCHECK       => \&bincheck,
 	RECOVERYCHECK  => \&recoverycheck,
-	UPGRADECHECK   => \&upgradecheck,);
+	UPGRADECHECK   => \&upgradecheck,
+	TAPTEST        => \&taptest,);
 
 my $proc = $command{$what};
 
 exit 3 unless $proc;
 
-&$proc();
+&$proc(@_);
 
 exit 0;
 
@@ -104,6 +98,7 @@ exit 0;
 
 sub installcheck
 {
+	my $schedule = shift || 'serial';
 	my @args = (
 		"../../../$Config/pg_regress/pg_regress",
 		"--dlpath=.",
@@ -119,6 +114,7 @@ sub installcheck
 
 sub check
 {
+	my $schedule = shift || 'parallel';
 	InstallTemp();
 	chdir "${topdir}/src/test/regress";
 	my @args = (
@@ -145,7 +141,7 @@ sub ecpgcheck
 	exit $status if $status;
 	InstallTemp();
 	chdir "$topdir/src/interfaces/ecpg/test";
-	$schedule = "ecpg";
+	my $schedule = "ecpg";
 	my @args     = (
 		"../../../../$Config/pg_regress_ecpg/pg_regress_ecpg",
 		"--bindir=",
@@ -219,6 +215,17 @@ sub bincheck
 	exit $mstat if $mstat;
 }
 
+sub taptest
+{
+	my $dir = shift;
+
+	die "no tests found!" unless -d "$topdir/$dir/t";
+
+	InstallTemp();
+	my $status = tap_check("$topdir/$dir");
+	exit $status if $status;
+}
+
 sub plcheck
 {
 	chdir "../../pl";
@@ -516,7 +523,6 @@ sub fetchRegressOpts
 	$m =~ s{\\\r?\n}{}g;
 	if ($m =~ /^\s*REGRESS_OPTS\s*\+?=(.*)/m)
 	{
-
 		# Substitute known Makefile variables, then ignore options that retain
 		# an unhandled variable reference.  Ignore anything that isn't an
 		# option starting with "--".
@@ -587,16 +593,19 @@ sub GetTests
 }
 
 sub InstallTemp
+{
+	unless ($ENV{NO_TEMP_INSTALL})
 	{
 		print "Setting up temp install\n\n";
 		Install("$tmp_installdir", "all", $config);
+	}
 	$ENV{PATH} = "$tmp_installdir/bin;$ENV{PATH}";
 }
 
 sub usage
 {
 	print STDERR
-	  "Usage: vcregress.pl <mode> [ <schedule> ]\n\n",
+	  "Usage: vcregress.pl <mode> [ <arg>]\n\n",
 	  "Options for <mode>:\n",
 	  "  bincheck       run tests of utilities in src/bin/\n",
 	  "  check          deploy instance and run regression tests on it\n",
@@ -607,9 +616,12 @@ sub usage
 	  "  modulescheck   run tests of modules in src/test/modules/\n",
 	  "  plcheck        run tests of PL languages\n",
 	  "  recoverycheck  run recovery test suite\n",
+	  "  taptest        run an arbitrary TAP test set\n",
 	  "  upgradecheck   run tests of pg_upgrade\n",
-	  "\nOptions for <schedule>:\n",
+	  "\nOptions for <arg>: (used by check and installcheck)\n",
 	  "  serial         serial mode\n",
-	  "  parallel       parallel mode\n";
+	  "  parallel       parallel mode\n",
+	  "\nOption for <arg>: for taptest\n",
+	  "  TEST_DIR       (required) directory where tests reside\n";
 	exit(1);
 }