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

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

proc _update_alternatives {
    local cur prev words cword
    _init_completion || return

    case (prev) {
        --altdir|--admindir {
            _filedir -d
            return 0
            }
        --help|--usage|--version {
            return 0
            }
    }

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

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