grabAppFromCydia.sh

#!/bin/sh
##
##  grabAppFromCydia.sh
##  Random scripts / Public domain
##
##  Created by Nicholas Penree on 10/16/09.
##  Copyright 2009 Conceited Software. All rights reserved.
##

version="0.5"
components=("$@")
parentFolder="/tmp"
applicationsFolder="Applications"
dataFile="data.tar.gz"
controlFile="control.tar.gz"
binaryFile="debian-binary"

if [ ${#components[@]} -ge 1 ]; then
	debURL="${components[0]}"
	debFile=`basename "$debURL"`
	folderName=`basename "$debURL" .deb`

	# step 1: create working folder	
	if [ -d "$parentFolder/$folderName" ]; then
		rm -rf "$parentFolder/$folderName"
	fi
	
	mkdir "$parentFolder/$folderName" || (echo "error: could not create $parentFolder/$folderName! aborting" && exit 1)
	cd "$parentFolder/$folderName" || (echo "error: could not change directory to $parentFolder/$folderName! aborting" && exit 1)
	
	# step 2: download .deb
	curl -O "$debURL" || (echo "error: download attempt failed! aborting" && exit 1)

	# step 3: extract .deb
	if [ -e "$debFile" ]; then
		ar -x "$debFile" &> /dev/null
		
		if [ $? -ne 0 ]; then
			echo "error: .deb extract failed! check file format. aborting"
			rm -rf "$parentFolder/$folderName"
			exit 1
		fi
	else
		echo "error: download failed, $debFile does not exist! aborting" && exit 1
	fi		
	
	# step 4: extract data tarball
	if [ -e "$dataFile" ]; then
		tar zxf "$dataFile"
	else
		echo "error: data extract failed! aborting" && exit 1
	fi
	
	# step 5: clean up
	rm -f "$debFile" &> /dev/null
	rm -f "$dataFile"  &> /dev/null
	rm -f "$controlFile"  &> /dev/null
	rm -f "$binaryFile"  &> /dev/null
	
	# step 6: re-sign app with your certificate
	## TODO: Add me!
	## export CODESIGN_ALLOCATE=/Developer/Platforms/iPhoneOS.platform\
	## /Developer/usr/bin/codesign_allocate
 	## codesign -f -s "iPhone Developer" $1.app
	
	# step 7: show finder window
	
	if [ -d "$parentFolder/$folderName/$applicationsFolder" ]; then
		open "$parentFolder/$folderName/$applicationsFolder"
	else
		open "$parentFolder/$folderName"
	fi
else
	echo "getAppFromCydia.sh version $version"
	echo "   usage: getAppFromCydia.sh <url to .deb>"
fi