I need to remove the attribute tags <types> </types> without any value in an xml file using ant script - regex

Question

I need to remove the attribute tags without any value in an xml file using ant script
Below is the XML I have:
<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
<types>
<members>DoNothingTest</members>
<name>ApexClass</name>
</types>
<types>
</types>
<types>
</types>
<types>
</types>
<types>
</types>
<version>42.0</version>
</Package>
All the tags that does not have a nesting tag or value should be removed from this xml . The output should look like below:
<?xml version="1.0" encoding="UTF-8"?>
<Package xmlns="http://soap.sforce.com/2006/04/metadata">
<types>
<members>DoNothingTest</members>
<name>ApexClass</name>
</types>
<version>42.0</version>
</Package>
How can I achieve this using ANT script?
I am using the below ant script to perform the job, however, it trims only one occurence of 'types' tag.
<!--Format the generated XML file -->
<target name="formatXML" depends="generatePackage.xml">
<property name="final-xml.file" value="temp/src/package.xml"/>
<for param="src-xml.absolute-path" list="${final-xml.file}">
<fileset dir="temp/src/" includes="*.xml"/>
<sequential>
<replaceregexp file="${final-xml.file}"
flags="s"
match="\s*(?:<\/([a-z]+)>)(\s*<\1>)"
replace=""/>
</sequential>
</for>
</target>
How to iterate over the xml file and replace all occurences of 'types' tags?

Answer 1

You can invoke an XSLT transformation from Ant using the XSLT ant task. A stylesheet to remove empty <types> elements in namespace http://soap.sforce.com/2006/04/metadata consists of a boilerplate identity rule to copy all elements unchanged, plus the rule
<xsl:template match="x:types[not(*) and not(text()[normalize-space()])]"
xmlns:x="http://soap.sforce.com/2006/04/metadata"/>