tools/squisher

#!/bin/sh
#
# Squish a CM otapackage for distribution
# cyanogen
#

OUT_TARGET_HOST=`uname -a | grep Darwin`
if [ -z "$OUT_TARGET_HOST" ]
then
   OUT_TARGET_HOST=linux-x86
   MD5=md5sum
   XARGS="xargs --max-args=1 --max-procs `grep 'processor' /proc/cpuinfo|wc -l`"
   SED=sed
else
   OUT_TARGET_HOST=darwin-x86
   MD5=md5
   XARGS="xargs -n 1 -P `sysctl hw.ncpu | awk '{print $2}'`"
   SED=gsed
fi

if [ -z "$OUT" -o ! -d "$OUT" ]; then
	echo "ERROR: $0 only works with a full build environment. $OUT should exist."
	exit 1
fi

if [ "$TARGET_BUILD_TYPE" = "debug" ]; then
    OTAPACKAGE=$OUT/${TARGET_PRODUCT}_debug-ota-$TARGET_BUILD_VARIANT.$USER.zip
else
    OTAPACKAGE=$OUT/$TARGET_PRODUCT-ota-$TARGET_BUILD_VARIANT.$USER.zip
fi
if [ ! -f "$OTAPACKAGE" ]; then
	echo "$OTAPACKAGE doesn't exist!";
	exit 1
fi

OPTICHARGER=$ANDROID_BUILD_TOP/vendor/cyanogen/tools/opticharger
QUIET=-q
DELETE_BINS="applypatch applypatch_static check_prereq recovery updater"


# Some products want a squashfs for xbin for space
case "$TARGET_PRODUCT" in
	cyanogen_dream_sapphire) WANT_SQUASHFS=1 ;;
	*) WANT_SQUASHFS=0 ;;
esac

if [ "$WANT_SQUASHFS" -eq 1 ]; then
	fatal=0
	MKSQUASHFS_VER_REQ=4
	if type mksquashfs >/dev/null 2>&1; then
		if mksquashfs -version | grep -q "version $MKSQUASHFS_VER_REQ"; then :; else
			echo
			echo "ERROR: mksquashfs must be at least version $MKSQUASHFS_VER_REQ for this build."
			fatal=1
		fi
	else
		echo
		echo "ERROR: $TARGET_PRODUCT requires mksquashfs."
		fatal=1
	fi

	if [ "$fatal" -ne 0 ]; then
		echo
		echo "       Unoptimized package is still available at"
		echo "         $OTAPACKAGE"
		exit $fatal
	fi
fi

REPACK=$OUT/repack.d
printf "Sanitizing environment..."
rm -rf $REPACK
mkdir -p $REPACK
echo


# Unpack the otapackage and opticharge all apks
mkdir $REPACK/ota
(
cd $REPACK/ota
printf "Unpacking $OTAPACKAGE..."
unzip $QUIET $OTAPACKAGE
echo
cd $REPACK/ota/system/framework
$OPTICHARGER framework-res.apk
cd $REPACK/ota/system/app
find ./ -name \*.apk | $XARGS $OPTICHARGER
)


if [ "$WANT_SQUASHFS" -eq 1 ]; then
	squash_opts="-force-uid 1000 -force-gid 1000 -no-progress -noappend -no-exports -no-recovery"
	updater=$REPACK/ota/META-INF/com/google/android/updater-script

	# Relocate su
	cp -a $REPACK/ota/system/xbin $REPACK/_xbin/
	rm -f $REPACK/_xbin/su $REPACK/ota/system/bin/su
	mv $REPACK/ota/system/xbin/su $REPACK/ota/system/bin/su
	chmod -R 555 $REPACK/_xbin/*

	# Create symlinks for su and busybox (since updater-script can't work on the squashfs filesystem).
	# Forgive me for the regex hell here. 
	ln -s ../bin/su $REPACK/_xbin/su
	for link in `sed -n -e's/,//g' -e'/symlink(.*busybox/,/xbin.*);/p' $updater | tr '"' '\n' | sed -n -e'\,/system/xbin/,s,/system/xbin/,,p'`
	do
		ln -s busybox $REPACK/_xbin/$link
	done

	# Create the squashfs with new and improved symlinkage!
	mksquashfs $REPACK/_xbin/* $REPACK/_xbin.sqf $squash_opts
	rm -rf $REPACK/ota/system/xbin/*
	mv $REPACK/_xbin.sqf $REPACK/ota/system/xbin/xbin.sqf
	chmod 444 $REPACK/ota/system/xbin/xbin.sqf

	# Remove xbin stuff and fix up updater-script
	$SED -i -e's,system/xbin/su,system/bin/su,g' -e'/xbin/d' $updater
fi


# Fix build.prop
$SED -i \
	-e '/ro\.kernel\.android\.checkjni/d' \
	-e '/ro\.build\.type/s/eng/user/' \
	$REPACK/ota/system/build.prop


# Delete unnecessary binaries
( cd $REPACK/ota/system/bin; echo $DELETE_BINS | xargs rm -f; )

# Delete leftover wireless driver
# rm -rf $REPACK/ota/system/lib/modules/*/kernel/drivers/net

# No need for recovery
rm -rf $REPACK/ota/recovery

# Strip modules
[ -d $REPACK/ota/system/lib/modules ] && \
	find $REPACK/ota/system/lib/modules -name "*.ko" -print0 | xargs -0 arm-eabi-strip --strip-unneeded

# Determine what to name the new signed package
if [ -z "$CYANOGEN_NIGHTLY" ]; then
	MODVERSION=`sed -n -e'/ro\.modversion/s/^.*CyanogenMod-//p' $REPACK/ota/system/build.prop`
	: ${MODVERSION:=nightly}
	OUTFILE=$OUT/update-cm-$MODVERSION-signed.zip
else
	OUTFILE=$OUT/update-squished.zip
fi

# Pack it up and sign
printf "Zipping package..."
( cd $REPACK/ota; zip $QUIET -r $REPACK/update.zip . )
echo
printf "Signing package..."
SECURITYDIR=$ANDROID_BUILD_TOP/build/target/product/security
java -Xmx512m \
	-jar $ANDROID_BUILD_TOP/out/host/$OUT_TARGET_HOST/framework/signapk.jar \
	-w $SECURITYDIR/testkey.x509.pem $SECURITYDIR/testkey.pk8 \
	$REPACK/update.zip $OUTFILE
echo
printf "Cleaning up..."
rm -rf $REPACK
echo

# Create a md5 checksum image of the repacked package
(
img=`basename $OUTFILE`
cd `dirname $OUTFILE`
$MD5 $img >$img.md5sum
echo
echo "Package complete: $OUTFILE"
cat $img.md5sum
echo
)

exit 0