strip_play_services.sh

#!/bin/sh

# 
# Strips the Google Play Services JAR archive and removes the folders that are specified below.
# This should lower the methods count of the final DEX file and should lower the chance of hitting
# the (dreaded) 64K methods limit.
#

#
# Author: Sebastiano Gottardo
# @rotxed - dextorer[at]gmail[dot]com
# 

PLAY_SERVICES_FILENAME="google-play-services.jar"
PLAY_SERVICES_TEMP_DIR="google-play-services-temp"
PLAY_SERVICES_STRIP_FILE="strip.conf"
PLAY_SERVICES_NESTED_PATH="com/google/android/gms"
PLAY_SERVICES_OUTPUT_FILE="google-play-services-STRIPPED.jar"

# Check if file exists in the same directory
if [ ! -f $PLAY_SERVICES_FILENAME ]; then
	echo "\nPlease put this script in the Play Services JAR location, then run it again\n\n"
	exit -1
fi

# Preventive cleanup 
rm -rf $PLAY_SERVICES_TEMP_DIR

# Create temporary work folder
mkdir $PLAY_SERVICES_TEMP_DIR
cp $PLAY_SERVICES_FILENAME $PLAY_SERVICES_TEMP_DIR/
cd $PLAY_SERVICES_TEMP_DIR

# Extract the content of the Play Services JAR archive
echo "Extracting archive, please wait.."
jar xvf $PLAY_SERVICES_FILENAME > /dev/null
echo "Extracted.\n"

# If the configuration file doesn't exist, create it
if [ ! -f ../$PLAY_SERVICES_STRIP_FILE ]; then
	# Create the file
	touch ../$PLAY_SERVICES_STRIP_FILE
	FOLDERS=`ls $PLAY_SERVICES_NESTED_PATH`
	for index in $FOLDERS
	do
    	echo "$index=true" >> ../$PLAY_SERVICES_STRIP_FILE
	done
fi

# Read configuration from file
while read -r FOLDERS
do
    CURRENT_FOLDER=$FOLDERS
    CURRENT_FOLDER_NAME=`echo $CURRENT_FOLDER | awk -F'=' '{print $1}'`
    CURRENT_FOLDER_ENABLED=`echo $CURRENT_FOLDER | awk -F'=' '{print $2}'`
    if [ "$CURRENT_FOLDER_ENABLED" = false ]; then
    	echo "Removed $CURRENT_FOLDER_NAME folder"
		rm -rf "$PLAY_SERVICES_NESTED_PATH/$CURRENT_FOLDER_NAME"
	fi
done < ../"$PLAY_SERVICES_STRIP_FILE"

# Create final stripped JAR
jar cf $PLAY_SERVICES_OUTPUT_FILE com/
cp $PLAY_SERVICES_OUTPUT_FILE ../
cd ..

# Clean up
echo "\nFolders removed, cleaning up.."
rm -rf $PLAY_SERVICES_TEMP_DIR

echo "All done, exiting!"
exit 0