extract

#!/bin/sh
NAME=$(basename $0)

if [[ $NAME == extract ]] ; then

	[[ -z $1 ]] && echo "Usage: $NAME <file to extract>" && exit
	[[ ! -f $1 ]] && echo "$1 is not a valid file" && exit

	echo "Extracting"
	case $1 in
		*.tar.bz2)   tar xjf $1 ;;
		*.tar.gz)    tar xzf $1 ;;
		*.bz2)       bunzip2 $1 ;;
		*.rar)       unrar x $1 ;;
		*.gz)        gunzip $1 ;;
		*.tar)       tar xf $1 ;;
		*.tbz2)      tar xjf $1 ;;
		*.tgz)       tar xzf $1 ;;
		*.zip)       unzip $1 ;;
		*.Z)         uncompress $1 ;;
		*.7z)        7z x $1 ;;
		*.lzma)      unlzma $1 ;;
		*.lzo)       lzop -x $1 ;;
		*)           echo "Unknown file '$1'..." ;;
	esac

else
	[[ -z $1 ]] && echo "Usage: $NAME <files to compress>" && exit

	echo "Compressing"
	case $1 in
		tbz)       tar cjvf $2.tar.bz2 $2 ;;
		tgz)       tar czvf $2.tar.gz  $2 ;;
		tar)       tar cpvf $2.tar $2 ;;
		bz2)       bzip2 -c $2 > $2.bz2 ;;
		lzma)      lzma -c $2 > $2.lzma ;;
		gz)        gzip -c -9 -n $2 > $2.gz ;;
		zip)       zip -r $2.zip $2 ;;
		7z)        7z a $2.7z $2 ;;
		lzo)       lzop $2 ;;
		*)         echo "'$1' cannot be packed via $NAME" ;;
	esac

fi