#!/usr/bin/env bash
# unpack:
if [[ -z "$@" ]]; then
  echo " ${0##*/} <archive> - extract common file formats"
  exit
fi
req_progs=(7z unrar unzip)
for p in ${req_prog[@]}; do
  hash "$p" 2>&- || \
    { echo >&2 "Required program \"$p\" not installed."; exit 1; }
done
#if [[ ! -f "$@" ]]; then
#  echo "File "$@" doesn't exist"
#  exit
#fi
case "$@" in
  *.7z ) 7z x "$@" ;;
  *.tar.bz2 ) tar xvjf "$@" ;;
  *.bz2 ) bunzip2 "$@" ;;
  *.deb ) ar vx "$@" ;;
  *.tar.gz ) tar xvf "$@" ;;
  *.tbz2 ) tar xvzf "$@" ;;
  *.tar.xz ) tar xvf "$@" ;;
  *.tgz ) tar xvzf "$@" ;;
  *.rar ) unrar x "$@" ;;
  *.zip ) unzip "$@" ;;
  *.Z ) uncompress "$@" ;;
  *. ) echo "Unsupported file format" ;;
esac