# bash completion for gzip                                 -*- shell-script -*-

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

    case $prev in
        --blocksize | --suffix | --help | --version | -!(-*)[bShV])
            return
            ;;
        --processes | -!(-*)p)
            COMPREPLY=($(compgen -W "{1..$(_ncpus)}" -- "$cur"))
            return
            ;;
    esac

    if [[ $cur == -* ]]; then
        COMPREPLY=($(compgen -W '$(_parse_help "$1") {-1..-9}' -- "$cur"))
        [[ ${COMPREPLY-} == *= ]] && compopt -o nospace
        return
    fi

    local IFS=$'\n' xspec="*.@(gz|t[ag]z)"
    [[ ${1##*/} == pigz ]] && xspec="*.@([gz]z|t[ag]z)"

    if [[ $prev == --* ]]; then
        [[ $prev == --@(decompress|list|test) ]] && xspec="!"$xspec
        [[ $prev == --force ]] && xspec=
    elif [[ $prev == -* ]]; then
        [[ $prev == -*[dlt]* ]] && xspec="!"$xspec
        [[ $prev == -*f* ]] && xspec=
    fi

    _tilde "$cur" || return

    compopt -o filenames
    COMPREPLY=($(compgen -f -X "$xspec" -- "$cur")
    $(compgen -d -- "$cur"))
} &&
    complete -F _gzip gzip pigz

# ex: filetype=sh