# This function is required by _dpkg and _dpkg-reconfigure -*- shell-script -*-

_have grep-status && {
    _comp_dpkg_installed_packages()
    {
        grep-status -P -e "^$1" -a -FStatus 'ok installed' -n -s Package
    }
} || {
    _comp_dpkg_installed_packages()
    {
        command grep -A 1 "Package: $1" /var/lib/dpkg/status 2>/dev/null |
            command grep -B 1 -Ee "ok installed|half-installed|unpacked| \
            half-configured" \
                -Ee "^Essential: yes" |
            awk "/Package: $1/ { print \$2 }" 2>/dev/null
    }
}

_have grep-status && {
    _comp_dpkg_purgeable_packages()
    {
        grep-status -P -e "^$1" -a -FStatus 'ok installed' -o -FStatus 'ok config-files' -n -s Package
    }
} || {
    _comp_dpkg_purgeable_packages()
    {
        command grep -A 1 "Package: $1" /var/lib/dpkg/status 2>/dev/null |
            command grep -B 1 -Ee "ok installed|half-installed|unpacked| \
            half-configured|config-files" \
                -Ee "^Essential: yes" |
            awk "/Package: $1/ { print \$2 }" 2>/dev/null
    }
}

# Debian dpkg(1) completion
#
_dpkg()
{
    local cur prev words cword split
    _init_completion -s || return

    local i=$cword

    # find the last option flag
    if [[ $cur != -* ]]; then
        while [[ $prev != -* && $i -ne 1 ]]; do
            prev=${words[--i - 1]}
        done
    fi

    case $prev in
        --install | --unpack | --record-avail | --contents | --info | --fsys-tarfile | \
            --field | --control | --extract | --vextract | --raw-extract | -!(-*)[ciAIfexX])
            _filedir '?(u|d)deb'
            return
            ;;
        --build | -!(-*)b)
            _filedir -d
            return
            ;;
        --status | --print-avail | --list | -!(-*)[spl])
            COMPREPLY=($(_xfunc apt-cache _apt_cache_packages))
            return
            ;;
        --show | -!(-*)W)
            if [[ $1 == *dpkg-query ]]; then
                COMPREPLY=($(_xfunc apt-cache _apt_cache_packages))
            else
                _filedir '?(u|d)deb'
            fi
            return
            ;;
        --search | -!(-*)S)
            _filedir
            return
            ;;
        --remove | --verify | -!(-*)[rV])
            COMPREPLY=($(_comp_dpkg_installed_packages "$cur"))
            return
            ;;
        --listfiles | --purge | -!(-*)[LP])
            COMPREPLY=($(_comp_dpkg_purgeable_packages "$cur"))
            return
            ;;
    esac

    $split && return

    COMPREPLY=($(compgen -W '$(_parse_help "$1")' -- "$cur"))
    [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
} &&
    complete -F _dpkg dpkg dpkg-query

# Debian dpkg-deb(1) completion
#
_dpkg_deb()
{
    local cur prev words cword split
    _init_completion -s || return

    _expand || return 0

    local i=$cword

    # find the last option flag
    if [[ $cur != -* ]]; then
        while [[ $prev != -* && $i -ne 1 ]]; do
            i=$((i-1))
            prev=${words[i-1]}
        done
    fi

    case $prev in
        -c|-I|-W|-f|-e|-x|-X|-R|--contents|--info|--show|--field|--control| \
        --extract|--vextract|--raw-extract|--fsys-tarfile)
            _filedir '?(u|d)deb'
            return 0
            ;;
        -b|--build)
            _filedir -d
            return 0
            ;;
    esac

    $split && return

    COMPREPLY=( $( compgen -W '$( _parse_help "$1" )' -- "$cur" ) )
    [[ $COMPREPLY == *= ]] && compopt -o nospace
} &&
complete -F _dpkg_deb dpkg-deb

# Debian GNU dpkg-reconfigure(8) completion
#
_dpkg_reconfigure()
{
    local cur prev words cword
    _init_completion || return

    local opt

    case $prev in
        --frontend | -!(-*)f)
            opt=($(printf '%s\n' /usr/share/perl5/Debconf/FrontEnd/*))
            opt=(${opt[@]##*/})
            opt=(${opt[@]%.pm})
            COMPREPLY=($(compgen -W '${opt[@]}' -- "$cur"))
            return
            ;;
        --priority | -!(-*)p)
            COMPREPLY=($(compgen -W 'low medium high critical' -- "$cur"))
            return
            ;;
    esac

    if [[ $cur == -* ]]; then
        COMPREPLY=($(compgen -W '--frontend --priority --all --unseen-only
            --help --showold --force --terse' -- "$cur"))
    else
        COMPREPLY=($(_comp_dpkg_installed_packages "$cur"))
    fi
} &&
    complete -F _dpkg_reconfigure -o default dpkg-reconfigure

# ex: filetype=sh
