Usage: jar <args>
--download-uri|-u <uri>     uri that goes to SRC_URI
--ebuild|-e <file>          path to ebuild that should be created
--generate-ebuild|-g        generates ebuild from pom.xml
--keywords|-k <keywords>    arch keywords
--license|-l <license>      license name
--pom|-p <file>             path to pom.xml that should be parsed, the path must
                            be relative to workdir (can be specified multiple
                            times)
--portage-tree|-t           path to portage tree that should be parsed when
                            refreshing cache (default is /usr/portage)
--cache-file		    location of output cache file (default is ~/.java-ebuilder/cache)
--refresh-cache|-c          refreshes java ebuild cache
--slot|-s  <slot>           SLOT number
--workdir|-w <dir>          path to workdir (default is current directory)
