xml-c14n: metanorma/metanorma#390

metanorma-plugin-lutaml.gemspec

@@ -42,4 +42,5 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency "timecop", "~> 0.9"
   spec.add_development_dependency "vcr", "~> 5.0.0"
   spec.add_development_dependency "webmock"
+  spec.add_development_dependency "xml-c14n"
 end

spec/spec_helper.rb

@@ -22,6 +22,7 @@
 require "metanorma-standoc"
 require "rspec/matchers"
 require "equivalent-xml"
+require "xml-c14n"
 
 Dir[File.expand_path("./support/**/**/*.rb", __dir__)].sort.each do |f|
   require f
@@ -80,10 +81,12 @@ def strip_guid(xml)
   xml
     .gsub(%r{ id="_[^"]+"}, ' id="_"')
     .gsub(%r{ target="_[^"]+"}, ' target="_"')
+    .gsub(%r{<fetched>[^<]+</fetched>}, "<fetched/>")
+    .gsub(%r{ schema-version="[^"]+"}, "")
 end
 
 def xml_string_content(xml)
-  strip_guid(xmlpp(Nokogiri::XML(xml).to_s))
+  strip_guid(Xml::C14n.format(Nokogiri::XML(xml).to_s))
 end
 
 def metanorma_process(input)
@@ -102,26 +105,3 @@ def strip_src(xml)
   xml.gsub(/\ssrc="[^"]+"/, ' src="_"')
 end
 
-XSL = Nokogiri::XSLT(<<~XSL.freeze)
-  <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
-    <xsl:output method="xml" encoding="UTF-8" indent="yes"/>
-    <xsl:strip-space elements="*"/>
-    <xsl:template match="/">
-      <xsl:copy-of select="."/>
-    </xsl:template>
-  </xsl:stylesheet>
-XSL
-
-def xmlpp(xml)
-  c = HTMLEntities.new
-  xml &&= xml.split(/(&\S+?;)/).map do |n|
-    if /^&\S+?;$/.match?(n)
-      c.encode(c.decode(n), :hexadecimal)
-    else n
-    end
-  end.join
-  XSL.transform(Nokogiri::XML(xml, &:noblanks))
-    .to_xml(indent: 2, encoding: "UTF-8")
-    .gsub(%r{<fetched>[^<]+</fetched>}, "<fetched/>")
-    .gsub(%r{ schema-version="[^"]+"}, "")
-end