# bash completion for update-alternatives -*- shell-script -*-

_installed_alternatives()
{
local admindir
# find the admin dir
for i in alternatives dpkg/alternatives rpm/alternatives; do
[[ -d /var/lib/$i ]] && admindir=/var/lib/$i && break
done
for (( i=1; i < cword; i++ )); do
if [[ "${words[i]}" == --admindir ]]; then
admindir=${words[i+1]}
break
fi
done
COMPREPLY=( $( compgen -W '$( command ls $admindir )' -- "$cur" ) )
}

_update_alternatives()
{
local cur prev words cword
_init_completion || return

case $prev in
--altdir|--admindir)
_filedir -d
return 0
;;
--help|--usage|--version)
return 0
;;
esac

local mode args i

# find which mode to use and how many real args used so far
for (( i=1; i < cword; i++ )); do
if [[ "${words[i]}" == --@(install|remove|auto|display|config|remove-all|set) ]]; then
mode=${words[i]}
args=$(($cword - i))
break
fi
done

case $mode in
--install)
case $args in
1|3)
_filedir
;;
2)
_installed_alternatives
;;
4)
# priority - no completions
;;
*)
case $((args % 4)) in
0|2)
_filedir
;;
1)
COMPREPLY=( $( compgen -W '--slave' -- "$cur" ) )
;;
3)
_installed_alternatives
;;
esac
esac
;;
--remove|--set)
case $args in
1)
_installed_alternatives
;;
2)
_filedir
;;
esac
;;
--auto|--remove-all|--display|--config)
_installed_alternatives
;;
*)
COMPREPLY=( $( compgen -W '--verbose --quiet --help --version
--altdir --admindir --install --remove --auto --display
--config --set' -- "$cur" ) )
esac
} &&
complete -F _update_alternatives update-alternatives alternatives

# ex: ts=4 sw=4 et filetype=sh