I created a little repository on github to parse or create wrapper files. I have not implemented everything, but it is a good base, i.e. if you want to create a galaxy wrapper from a standard help output !

Just clone it and have fun : 

git clone https://github.com/remyd1/XMLparser-wrapper.git

cd XMLparser-wrapper

python ParserConverterXML.py --help

python ParserConverterXML.py h2gw -c "ls --help" -o ../ls.gw.xml

Any help is welcome on this little project. Exemples : json for workflows...

Best regards,

Remy