From 17b87b3049fa7e3ddc68bf9daaffa3b01d7b8be2 Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 9 Jul 2020 17:38:52 -0400
Subject: [PATCH] Tighten up Windows CRLF conversion in our TAP test scripts.

Back-patch commits 91bdf499b and ffb4cee43, so that all branches
agree on when and how to do Windows CRLF conversion.

This should close the referenced thread.  Thanks to Andrew Dunstan
for discussion/review.

Discussion: https://postgr.es/m/412ae8da-76bb-640f-039a-f3513499e53d@gmx.net
---
 src/bin/pg_rewind/t/RewindTest.pm |  2 +-
 src/test/perl/PostgresNode.pm     | 17 ++++++++++-------
 src/test/perl/TestLib.pm          |  2 +-
 3 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/src/bin/pg_rewind/t/RewindTest.pm b/src/bin/pg_rewind/t/RewindTest.pm
index 7dabf395e1..77fa632ce9 100644
--- a/src/bin/pg_rewind/t/RewindTest.pm
+++ b/src/bin/pg_rewind/t/RewindTest.pm
@@ -112,7 +112,7 @@ sub check_query
 	}
 	else
 	{
-		$stdout =~ s/\r//g if $Config{osname} eq 'msys';
+		$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		is($stdout, $expected_stdout, "$test_name: query result matches");
 	}
 	return;
diff --git a/src/test/perl/PostgresNode.pm b/src/test/perl/PostgresNode.pm
index 1407359aef..1dedba4785 100644
--- a/src/test/perl/PostgresNode.pm
+++ b/src/test/perl/PostgresNode.pm
@@ -1324,7 +1324,6 @@ sub safe_psql
 		print "\n#### End standard error\n";
 	}
 
-	$stdout =~ s/\r//g if $TestLib::windows_os;
 	return $stdout;
 }
 
@@ -1513,16 +1512,20 @@ 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 $$stdout;
-		$$stdout =~ s/\r//g if $TestLib::windows_os;
 	}
 
 	if (defined $$stderr)
 	{
+		$$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp $$stderr;
-		$$stderr =~ s/\r//g if $TestLib::windows_os;
 	}
 
 	# See http://perldoc.perl.org/perlvar.html#%24CHILD_ERROR
@@ -1652,8 +1655,8 @@ sub poll_query_until
 	{
 		my $result = IPC::Run::run $cmd, '>', \$stdout, '2>', \$stderr;
 
+		$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 		chomp($stdout);
-		$stdout =~ s/\r//g if $TestLib::windows_os;
 
 		if ($stdout eq $expected)
 		{
@@ -1668,8 +1671,8 @@ sub poll_query_until
 
 	# The query result didn't change in 180 seconds. Give up. Print the
 	# output from the last attempt, hopefully that's useful for debugging.
+	$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	chomp($stderr);
-	$stderr =~ s/\r//g if $TestLib::windows_os;
 	diag qq(poll_query_until timed out executing this query:
 $query
 expecting this output:
@@ -2113,8 +2116,8 @@ sub pg_recvlogical_upto
 		}
 	};
 
-	$stdout =~ s/\r//g if $TestLib::windows_os;
-	$stderr =~ s/\r//g if $TestLib::windows_os;
+	$stdout =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
+	$stderr =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 
 	if (wantarray)
 	{
diff --git a/src/test/perl/TestLib.pm b/src/test/perl/TestLib.pm
index d579d5c177..a7490d2ce7 100644
--- a/src/test/perl/TestLib.pm
+++ b/src/test/perl/TestLib.pm
@@ -430,7 +430,7 @@ sub slurp_file
 		CloseHandle($fHandle)
 		  or die "could not close \"$filename\": $^E\n";
 	}
-	$contents =~ s/\r//g if $Config{osname} eq 'msys';
+	$contents =~ s/\r\n/\n/g if $Config{osname} eq 'msys';
 	return $contents;
 }