#compdef port
 
 local subcmds 
 
 # we cache the list of ports
 # we shall use some cache policy to avoid problems with new ports
 if (( ! $+portlist )); then
 	portlist=($(port echo all; echo "all current active inactive installed uninstalled outdated"))
 fi
 
 subcmds=(
 'activate'
 'archive'
 'build'
 'cat'
 'clean'
 'configure'
 'contents'
 'deactivate'
 'dependents'
 'deps'
 'destroot'
 'dir'
 'distcheck'
 'distclean'
 'dmg'
 'echo'
 'edit'
 'extract'
 'fetch'
 'file'
 'help'
 'info'
 'install' 
 'installed' 
 'list'
 'livecheck'
 'location'
 'mpkg'
 'outdated'
 'patch'
 'pkg'
 'provides'
 'rpmpackage'
 'search'
 'selfupdate'
 'sync'
 'test'
 'unarchive'
 'uninstall'
 'upgrade' 
 'variants'
 'version'
 )
 
 _arguments -C \
 '-v[verbose mode (generate verbose messages)]' \
 '-d[debug mode (generate debugging messages)]' \
 '-q[quiet mode (suppress messages)]' \
 '-D[specify portdir]' \
 '-k[keep mode (do not autoclean after install)]' \
 '-n[dont follow dependencies in upgrade (only for upgrading)]' \
 '-a[upgrade all installed ports (only for upgrading)]' \
 '-u[uninstall non-active ports when upgrading and uninstalling]' \
 '-f[force mode (ignore state file)]' \
 '-s[source-only mode]' \
 '-b[binary-only mode]' \
 '-o[honor state files older than Portfile]' \
 '*::command:->command' \
 && return 0
 
 case $state in
 	command)
 	if ((CURRENT == 1)); then
 		state=subcommands
 	else
 		state=portname
 	fi
 	;;
 esac
 
 case $state in
 	subcommands)
 	_describe -t commands 'port commands' subcmds
 	;;
 	portname)
 	_describe -t commands 'available ports' portlist
 	;;
 esac