Provide for contrib and pgxs modules to install include files.

This allows out-of-tree PLs and similar code to get access to
definitions needed to work with extension data types.

The following existing modules now install headers: contrib/cube,
contrib/hstore, contrib/isn, contrib/ltree, contrib/seg.

Discussion: https://postgr.es/m/87y3euomjh.fsf%40news-spur.riddles.org.uk

1 files changed, 43 insertions, 0 deletions

diff --git a/src/tools/msvc/Install.pm b/src/tools/msvc/Install.pm
index 429608fde61..60b5639df85 100644
--- a/src/tools/msvc/Install.pm
+++ b/src/tools/msvc/Install.pm
@@ -554,6 +554,49 @@ sub CopySubdirFiles
 		}
 	}
 
+	{
+		$flist = '';
+		if ($mf =~ /^HEADERS\s*=\s*(.*)$/m) { $flist .= $1 }
+		my @modlist = ();
+		my %fmodlist = ();
+		while ($mf =~ /^HEADERS_([^\s=]+)\s*=\s*(.*)$/mg) { $fmodlist{$1} .= $2 }
+
+		if ($mf =~ /^MODULE_big\s*=\s*(.*)$/m)
+		{
+			push @modlist, $1;
+			if ($flist ne '')
+			{
+				$fmodlist{$1} = $flist;
+				$flist = '';
+			}
+		}
+		elsif ($mf =~ /^MODULES\s*=\s*(.*)$/m)
+		{
+			push @modlist, split /\s+/, $1;
+		}
+
+		croak "HEADERS requires MODULE_big in $subdir $module"
+		  if $flist ne '';
+
+		foreach my $mod (keys %fmodlist)
+		{
+			croak "HEADERS_$mod for unknown module in $subdir $module"
+			  unless grep { $_ eq $mod } @modlist;
+			$flist = ParseAndCleanRule($fmodlist{$mod}, $mf);
+			EnsureDirectories($target,
+							  "include", "include/server",
+							  "include/server/$moduledir",
+							  "include/server/$moduledir/$mod");
+			foreach my $f (split /\s+/, $flist)
+			{
+				lcopy("$subdir/$module/$f",
+					  "$target/include/server/$moduledir/$mod/" . basename($f))
+				  || croak("Could not copy file $f in $subdir $module");
+				print '.';
+			}
+		}
+	}
+
 	$flist = '';
 	if ($mf =~ /^DOCS\s*=\s*(.*)$/mg) { $flist .= $1 }
 	if ($flist ne '')