#!/usr/bin/env bash

ex () {
  file=$1
  [ -z "$file" ] && echo 'ex <compressed>' && return 1
  [ ! -f "$file" ] && echo 'Invalid file: `'$file'`' && return 1
  case $file in
    *.tar.bz2)   tar xjf $file;;
    *.tar.gz)    tar xzf $file;;
    *.bz2)       bunzip2 $file;;
    *.rar)       unrar x $file;;
    *.gz)        gunzip $file;;
    *.tar)       tar xf $file;;
    *.tbz2)      tar xjf $file;;
    *.tgz)       tar xzf $file;;
    *.zip)       unzip $file;;
    *.Z)         uncompress $file;;
    *.7z)        7z x $file;;
    *.xz)        unxz $file;;
    *)           echo 'Unknown suffix on file: `'$file'`'; return 1 ;;
  esac
}

ex "$@"