extract.plugins.bash

# shellcheck shell=bash

cite about-plugin
about-plugin 'Extractor helper functions for various archive types'

extract () {
    local opt
    local OPTIND=1
    while getopts "hv" opt; do
        case "$opt" in
            h)
                cat <<End-Of-Usage
Usage: ${FUNCNAME[0]} [option] <archives>
    options:
        -h  show this message and exit
        -v  verbosely list files processed
End-Of-Usage
                return
                ;;
            v)
                local -r verbose='v'
                ;;
            ?)
                extract -h >&2
                return 1
                ;;
        esac
    done
    shift $((OPTIND-1))

    [[ $# -eq 0 ]] && extract -h && return 1
    while [[ $# -gt 0 ]]; do
        if [[ ! -f "$1" ]]; then
            echo "extract: '$1' is not a valid file" >&2
            shift
            continue
        fi

        local -r filename=$(basename -- $1)
        local -r filedirname=$(dirname -- $1)
        local targetdirname

        targetdirname=$(sed 's/\(\.tar\.bz2$\|\.tbz$\|\.tbz2$\|\.tar\.gz$\|\.tgz$\|\.tar$\|\.tar\.xz$\|\.txz$\|\.tar\.Z$\|\.7z$\)//g' <<< $filename)
        if [[ "$filename" = "$targetdirname" ]]; then
            # archive type either not supported or it doesn't need dir creation
            targetdirname=""
        else
            mkdir -v "$filedirname/$targetdirname"
        fi

        if [[ -f "$1" ]]; then
            case "$1" in
                *.tar.bz2|*.tbz|*.tbz2) tar "x${verbose}jf" "$1" -C "$filedirname/$targetdirname" ;;
                *.tar.gz|*.tgz) tar "x${verbose}zf" "$1" -C "$filedirname/$targetdirname" ;;
                *.tar.xz|*.txz) tar "x${verbose}Jf" "$1" -C "$filedirname/$targetdirname" ;;
                *.tar.Z) tar "x${verbose}Zf" "$1" -C "$filedirname/$targetdirname" ;;
                *.bz2) bunzip2 "$1" ;;
                *.deb) dpkg-deb -x${verbose} "$1" "${1:0:-4}" ;;
                *.pax.gz) gunzip "$1"; set -- "$@" "${1:0:-3}" ;;
                *.gz) gunzip "$1" ;;
                *.pax) pax -r -f "$1" ;;
                *.pkg) pkgutil --expand "$1" "${1:0:-4}" ;;
                *.rar) unrar x "$1" ;;
                *.rpm) rpm2cpio "$1" | cpio -idm${verbose} ;;
                *.tar) tar "x${verbose}f" "$1" -C "$filedirname/$targetdirname" ;;
                *.xz) xz --decompress "$1" ;;
                *.zip|*.war|*.jar) unzip "$1" ;;
                *.Z) uncompress "$1" ;;
                *.7z) 7za x "$1" ;;
                *) echo "'$1' cannot be extracted via extract" >&2;;
            esac
        fi

        shift
    done
}