# 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