Back-patch fixes to make TAP tests work on Windows.

This back-ports commit 13d856e177e69083 and assorted followon patches
into 9.4 and 9.5.  9.5 and HEAD are now substantially identical in all
the files touched by this commit, except that 010_pg_basebackup.pl has
a few more tests related to the new --slot option.  9.4 has many fewer
TAP tests, but the test infrastructure files are substantially the same,
with the exception that 9.4 lacks the single-tmp-install infrastructure
introduced in 9.5 (commit dcae5faccab64776).

The primary motivation for this patch is to ensure that TAP test case
fixes can be back-patched without hazards of the kind seen in commits
34557f544/06dd4b44f.  In principle it should also make the world safe
for running the TAP tests in the buildfarm in these branches; although
we might want to think about back-porting dcae5faccab64776 to 9.4 if
we're going to do that for real, because the TAP tests are quite disk
space hungry without it.

Michael Paquier did the back-porting work; original patches were by
him and assorted other people.

2 files changed, 49 insertions, 2 deletions

diff --git a/src/tools/msvc/clean.bat b/src/tools/msvc/clean.bat
index e06838cc1ef..b071cb740cc 100755
--- a/src/tools/msvc/clean.bat
+++ b/src/tools/msvc/clean.bat
@@ -74,6 +74,12 @@ if exist src\test\regress\regress.dll del /q src\test\regress\regress.dll
 if exist src\test\regress\refint.dll del /q src\test\regress\refint.dll
 if exist src\test\regress\autoinc.dll del /q src\test\regress\autoinc.dll
 
+if exist src\bin\initdb\tmp_check rd /s /q src\bin\initdb\tmp_check
+if exist src\bin\pg_basebackup\tmp_check rd /s /q src\bin\pg_basebackup\tmp_check
+if exist src\bin\pg_config\tmp_check rd /s /q src\bin\pg_config\tmp_check
+if exist src\bin\pg_ctl\tmp_check rd /s /q src\bin\pg_ctl\tmp_check
+if exist src\bin\scripts\tmp_check rd /s /q src\bin\scripts\tmp_check
+
 REM Clean up datafiles built with contrib
 REM cd contrib
 REM for /r %%f in (*.sql) do if exist %%f.in del %%f
diff --git a/src/tools/msvc/vcregress.pl b/src/tools/msvc/vcregress.pl
index 8f9fc790e30..84114205bb5 100644
--- a/src/tools/msvc/vcregress.pl
+++ b/src/tools/msvc/vcregress.pl
@@ -7,7 +7,9 @@ use strict;
 our $config;
 
 use Cwd;
+use File::Basename;
 use File::Copy;
+use File::Find ();
 
 use Install qw(Install);
 
@@ -31,7 +33,7 @@ if (-e "src/tools/msvc/buildenv.pl")
 
 my $what = shift || "";
 if ($what =~
-/^(check|installcheck|plcheck|contribcheck|ecpgcheck|isolationcheck|upgradecheck)$/i
+/^(check|installcheck|plcheck|contribcheck|ecpgcheck|isolationcheck|upgradecheck|tapcheck)$/i
   )
 {
 	$what = uc $what;
@@ -58,7 +60,7 @@ unless ($schedule)
 	$schedule = "parallel" if ($what eq 'CHECK' || $what =~ /PARALLEL/);
 }
 
-$ENV{PERL5LIB} = "$topdir/src/tools/msvc";
+$ENV{PERL5LIB} = "$topdir/src/tools/msvc;$ENV{PERL5LIB}";
 
 my $maxconn = "";
 $maxconn = "--max_connections=$ENV{MAX_CONNECTIONS}"
@@ -77,6 +79,7 @@ my %command = (
 	ECPGCHECK      => \&ecpgcheck,
 	CONTRIBCHECK   => \&contribcheck,
 	ISOLATIONCHECK => \&isolationcheck,
+	TAPCHECK       => \&tapcheck,
 	UPGRADECHECK   => \&upgradecheck,);
 
 my $proc = $command{$what};
@@ -162,6 +165,44 @@ sub isolationcheck
 	exit $status if $status;
 }
 
+sub tapcheck
+{
+	my @args = ( "prove", "--verbose", "t/*.pl");
+	my $mstat = 0;
+
+	$ENV{PERL5LIB} = "$topdir/src/test/perl;$ENV{PERL5LIB}";
+	$ENV{PG_REGRESS} = "$topdir/$Config/pg_regress/pg_regress";
+
+	# 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);
+
+	# Process each test
+	foreach my $test_path (@$tap_dirs)
+	{
+		my $dir = dirname($test_path);
+		my $tmp_root = "$dir/tmp_check";
+		(mkdir $tmp_root || die $!) unless -d $tmp_root;
+		my $tmp_install = "$tmp_root/install";
+		Install($tmp_install, "all", $config);
+		chdir $dir;
+		# Reset those values, they may have been changed by another test.
+		$ENV{TESTDIR} = "$dir";
+		system(@args);
+		my $status = $? >> 8;
+		$mstat ||= $status;
+	}
+	exit $mstat if $mstat;
+}
+
 sub plcheck
 {
 	chdir "../../pl";