extract-jars.sh

HOME_DIRECTORY=`pwd`

cd ~
USER_DIRECTORY=`pwd`

cd $HOME_DIRECTORY

LIB_DIRECTORY="$HOME_DIRECTORY"/lib

cfrFile="$LIB_DIRECTORY"/cfr_0_110.jar

foundJava=`type -p java`
if [ "`type -p java`" = "" ]; then
	echo "Command \"java\" not found. You may not install JDK on your machine."
	exit
fi

if [ "`type -p jar`" = "" ]; then
	echo "Command \"jar\" not found. You may not install JDK on your machine."
	exit
fi

if [ "$MODE" != "test" ]; then

    echo "-----"
    echo "Tool for extracting all .war and .jar files"
    read -p "1. Enter the full path of source directory (ex: $USER_DIRECTORY/.m2/repository): " sourceDirectory

    if [ ! -d "$sourceDirectory" ]; then
    	echo "\""$sourceDirectory"\" is not a valid directory"
    	exit
    fi

    read -p "2. Enter the full path of destination directory (ex: $USER_DIRECTORY/code-collection/target): " destinationDirectory

    if [ ! -d "$destinationDirectory" ]; then
    	echo "\""$destinationDirectory"\" is not a valid directory"
    	exit
    fi

fi

echo "Begin scan for jar files and extract them to the destination directory"
echo ">> Source: " $sourceDirectory
echo ">> Destination: " $destinationDirectory

totalJarFiles=0

startTime=`date`

cd $sourceDirectory

for jarFile in `find . -type f -name "*.jar" -o -name "*.war"`; do
	#Extract this jar file
  	jarFileWithExtension=`basename $jarFile`
  	#Directory
  	jarFileRegex="(.*).(jar|war)"
  	[[ $jarFileWithExtension =~ $jarFileRegex ]]
    extractDirectory="${BASH_REMATCH[1]}"
    fileExtension="${BASH_REMATCH[2]}"
    targetDirectory=$destinationDirectory/$extractDirectory

    #Extract
    echo "Begin extracting file: " $jarFileWithExtension " to directory " $targetDirectory
    if [ ! -d "$targetDirectory" ]; then
    	mkdir -p $targetDirectory
	fi

    cd $sourceDirectory
    cp $jarFile $targetDirectory
    cd $targetDirectory
    jar xf $jarFileWithExtension

    rm $jarFileWithExtension

    #decompile
    if [ "$fileExtension" = "jar" ]; then
    	#use decompile tool
    	echo "Begin decomplining jar file: " $jarFile
    	cd $sourceDirectory
		java -jar $cfrFile $jarFile --outputdir $targetDirectory --comments false
    fi

    #remove .class files
    cd $targetDirectory
    find . -type f -name "*.class" -exec rm {} +

	totalJarFiles=$((totalJarFiles+1))
done

endTime=`date`


echo "-----"
echo "Finished extract "$totalJarFiles" jar file(s) to destination directory. Start Time: " $startTime ". End Time: " $endTime
echo "-----"