gem file to install locally. Note: this will install the gem in ${gem.home} so in general that is only
useful if some other goal does something with it
Command line -Dgem=...
gem -
Variable in class de.saumya.mojo.gem.PushMojo
arguments for the ruby script given through file parameter.
if the pom.xml has no runtime dependency to a jruby-complete.jar then
this version is used to resolve the jruby-complete dependency from the
local/remote maven repository.