Remove most msys special processing in TAP tests

Following migration of Windows buildfarm members running TAP tests to
use of ucrt64 perl for those tests, special processing for msys perl is
no longer necessary and so is removed.

Backpatch to release 10

Discussion: https://postgr.es/m/c65a8781-77ac-ea95-d185-6db291e1baeb@dunslane.net

src/bin/pg_ctl/t/001_start_stop.pl

@@ -46,16 +46,7 @@ my $ctlcmd = [
 	'pg_ctl', 'start', '-D', "$tempdir/data", '-l',
 	"$TestLib::log_path/001_start_stop_server.log"
 ];
-if ($Config{osname} ne 'msys')
-{
-	command_like($ctlcmd, qr/done.*server started/s, 'pg_ctl start');
-}
-else
-{
-
-	# use the version of command_like that doesn't hang on Msys here
-	command_like_safe($ctlcmd, qr/done.*server started/s, 'pg_ctl start');
-}
+command_like($ctlcmd, qr/done.*server started/s, 'pg_ctl start');
 
 # sleep here is because Windows builds can't check postmaster.pid exactly,
 # so they may mistake a pre-existing postmaster.pid for one created by the

src/bin/pg_rewind/t/RewindTest.pm

@@ -115,7 +115,6 @@ sub check_query
 	}
 	else
 	{
-		$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		is($stdout, $expected_stdout, "$test_name: query result matches");
 	}
 	return;

src/test/perl/PostgresNode.pm

@@ -846,9 +846,7 @@ sub kill9
 	local %ENV = $self->_get_env();
 
 	print "### Killing node \"$name\" using signal 9\n";
-	# kill(9, ...) fails under msys Perl 5.8.8, so fall back on pg_ctl.
-	kill(9, $self->{_pid})
-	  or TestLib::system_or_bail('pg_ctl', 'kill', 'KILL', $self->{_pid});
+	kill(9, $self->{_pid});
 	$self->{_pid} = undef;
 	return;
 }
@@ -1772,19 +1770,13 @@ sub psql
 		}
 	};
 
-	# Note: on Windows, IPC::Run seems to convert \r\n to \n in program output
-	# if we're using native Perl, but not if we're using MSys Perl.  So do it
-	# by hand in the latter case, here and elsewhere.
-
 	if (defined $$stdout)
 	{
-		$$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp $$stdout;
 	}
 
 	if (defined $$stderr)
 	{
-		$$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp $$stderr;
 	}
 
@@ -2261,9 +2253,7 @@ sub poll_query_until
 		my $result = IPC::Run::run $cmd, '<', \$query,
 		  '>', \$stdout, '2>', \$stderr;
 
-		$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp($stdout);
-		$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp($stderr);
 
 		if ($stdout eq $expected && $stderr eq '')
@@ -2717,9 +2707,6 @@ sub pg_recvlogical_upto
 		}
 	};
 
-	$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
-	$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
-
 	if (wantarray)
 	{
 		return ($ret, $stdout, $stderr, $timeout);

src/test/perl/TestLib.pm

@@ -382,7 +382,6 @@ sub run_command
 	my ($cmd) = @_;
 	my ($stdout, $stderr);
 	my $result = IPC::Run::run $cmd, '>', \$stdout, '2>', \$stderr;
-	foreach ($stderr, $stdout) { s/\r\n/\n/g if $Config{osname} eq 'msys'; }
 	chomp($stdout);
 	chomp($stderr);
 	return ($stdout, $stderr);
@@ -467,7 +466,6 @@ sub slurp_file
 	$contents = <$fh>;
 	close $fh;
 
-	$contents =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	return $contents;
 }
 
@@ -825,7 +823,6 @@ sub command_like
 	my $result = IPC::Run::run $cmd, '>', \$stdout, '2>', \$stderr;
 	ok($result, "$test_name: exit code 0");
 	is($stderr, '', "$test_name: no stderr");
-	$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	like($stdout, $expected_stdout, "$test_name: matches");
 	return;
 }
@@ -878,7 +875,6 @@ sub command_fails_like
 	print("# Running: " . join(" ", @{$cmd}) . "\n");
 	my $result = IPC::Run::run $cmd, '>', \$stdout, '2>', \$stderr;
 	ok(!$result, "$test_name: exit code not 0");
-	$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	like($stderr, $expected_stderr, "$test_name: matches");
 	return;
 }
@@ -923,8 +919,6 @@ sub command_checks_all
 	  if $ret & 127;
 	$ret = $ret >> 8;
 
-	foreach ($stderr, $stdout) { s/\r\n/\n/g if $Config{osname} eq 'msys'; }
-
 	# check status
 	ok($ret == $expected_ret,
 		"$test_name status (got $ret vs expected $expected_ret)");

src/test/recovery/t/021_row_visibility.pl

@@ -187,9 +187,6 @@ sub send_query_and_wait
 	$$psql{run}->pump_nb();
 	while (1)
 	{
-		# See PostgresNode.pm's psql()
-		$$psql{stdout} =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
-
 		last if $$psql{stdout} =~ /$untl/;
 
 		if ($psql_timeout->is_expired)

src/test/recovery/t/cp_history_files

@@ -7,11 +7,4 @@ use warnings;
 die "wrong number of arguments" if @ARGV != 2;
 my ($source, $target) = @ARGV;
 exit if $source !~ /history/;
-if ($^O eq 'msys')
-{
-    # make a windows path look like an msys path if necessary
-    $source =~ s!^([A-Za-z]):!'/' . lc($1)!e;
-    $source =~ s!\\!/!g;
-}
-
 copy($source, $target) or die "couldn't copy $source to $target: $!";