helm/bin/unarchive

#!/usr/bin/env bash

# Extracts the contents of archives.
#
# Adapted from a script by Sorin Ionescu <sorin.ionescu@gmail.com>

success=
file_name=
extract_dir=
while (( $# > 0 )); do
    if [[ ! -s $1 ]]; then
        print "$0: file not valid: $1" >&2
        shift
        continue
    fi

    success=0
    file_name="${1:t}"
    extract_dir="${file_name:r}"
    case ${1:l} in
        *.tar.gz|*.tgz) tar xvzf "$1" ;;
        *.tar.bz2|*.tbz|*.tbz2) tar xvjf "$1" ;;
        *.tar.xz|*.txz) tar --xz --help &> /dev/null \
            && tar --xz -xvf "$1" \
            || xzcat "$1" | tar xvf - ;;
        *.tar.zma|*.tlz) tar --lzma --help &> /dev/null \
            && tar --lzma -xvf "$1" \
            || lzcat "$1" | tar xvf - ;;
        *.tar) tar xvf "$1" ;;
        *.gz) gunzip "$1" ;;
        *.bz2) bunzip2 "$1" ;;
        *.xz) unxz "$1" ;;
        *.lzma) unlzma "$1" ;;
        *.Z) uncompress "$1" ;;
        *.zip) unzip "$1" -d $extract_dir ;;
        *.rar) unrar &> /dev/null \
            && unrar x -ad "$1" \
            || rar x -ad "$1" ;;
        *.7z) 7za x "$1" ;;
        *.deb)
            mkdir -p "$extract_dir/control"
            mkdir -p "$extract_dir/data"
            cd "$extract_dir"; ar vx "../${1}" > /dev/null
            cd control; tar xzvf ../control.tar.gz
            cd ../data; tar xzvf ../data.tar.gz
            cd ..; rm *.tar.gz debian-binary
            cd ..
            ;;
        *)  print "$0: cannot extract: $1" >&2
            success=1
            ;;
    esac
    shift
done