Schema Changes: 2.11.4

CREATE OR REPLACE FUNCTION evergreen.oils_xslt_process(TEXT, TEXT) RETURNS TEXT AS $func$
  use strict;

  use XML::LibXSLT;
  use XML::LibXML;

  my $doc = shift;
  my $xslt = shift;

  # The following approach uses the older XML::LibXML 1.69 / XML::LibXSLT 1.68
  # methods of parsing XML documents and stylesheets, in the hopes of broader
  # compatibility with distributions
  my $parser = $_SHARED{'_xslt_process'}{parsers}{xml} || XML::LibXML->new();

  # Cache the XML parser, if we do not already have one
  $_SHARED{'_xslt_process'}{parsers}{xml} = $parser
    unless ($_SHARED{'_xslt_process'}{parsers}{xml});

  my $xslt_parser = $_SHARED{'_xslt_process'}{parsers}{xslt} || XML::LibXSLT->new();

  # Cache the XSLT processor, if we do not already have one
  $_SHARED{'_xslt_process'}{parsers}{xslt} = $xslt_parser
    unless ($_SHARED{'_xslt_process'}{parsers}{xslt});

  my $stylesheet = $_SHARED{'_xslt_process'}{stylesheets}{$xslt} ||
    $xslt_parser->parse_stylesheet( $parser->parse_string($xslt) );

  $_SHARED{'_xslt_process'}{stylesheets}{$xslt} = $stylesheet
    unless ($_SHARED{'_xslt_process'}{stylesheets}{$xslt});

  return $stylesheet->output_as_chars(
    $stylesheet->transform(
      $parser->parse_string($doc)
    )
  );

$func$ LANGUAGE 'plperlu' STRICT IMMUTABLE;