milis21-mirror/bin/unpack

#!/bin/bash
# source: https://gist.github.com/markusfisch/871266/d522bf6589197724d8fcccb2b6c6e2a93bb366fc
##
# Unpack archive safely (means always in its own directory)
#
# @param 1 - name and path of archive to extract
#
unpack()
{
	local ARCHIVE=$1
	local TMP=.unpack-$USER-$$
	local EXTRACT=`basename "$ARCHIVE" | cut -d '.' -f 1`

	[ -f "$ARCHIVE" ] || {
		echo "$ARCHIVE not found"
		return 1
	}

	# ensure extracted directory is not yet there
	{
		local BASE="$EXTRACT"
		local N=2

		while [ -d "$EXTRACT" ]; do
			EXTRACT="$BASE-$N"
			(( N++ ))
		done
	}

	mkdir $TMP || {
		echo "cannot create temporary directory"
		return 1
	}

	cd $TMP || {
		echo "cannot change into temporary directory"
		return 1
	}

	case "$ARCHIVE" in
		*.zip)
			unzip "../$ARCHIVE"
			;;
		*.rar)
			unrar x "../$ARCHIVE"
			;;
		*.tbz2|*.tar.bz2)
			tar xjvf "../$ARCHIVE"
			;;
		*.tgz|*.tar.gz)
			tar xzvf "../$ARCHIVE"
			;;
		*.lz)
			tar xvf "../$ARCHIVE"
			;;
		*.gz)
			gzip -d "../$ARCHIVE"
			;;
		*.bzip2|*.bz2)
			bzip2 -d "../$ARCHIVE"
			;;
	esac

	# move into place
	{
		local FILES=0

		for FILE in *
		do
			(( FILES++ ))
		done

		cd ..

		if (( FILES == 1 )); then
			mv -i $TMP/* .
			mv -i $TMP/.[!.]* .
			rmdir $TMP
		else
			mv -i $TMP $EXTRACT
		fi
	}

	return 0
}

for ARCHIVE in $@
do
	# milisarge fixed this for full path extract
	cd `dirname $ARCHIVE`
	unpack "`basename $ARCHIVE`" || exit 1
done