#!/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 "$@"