Using getResource with ProGuard results in null result

Question

Using ProGuard on my jar files has broken my calls to class.getResource(""). I have seen that in the ProGuard manual you need to specify the -keepdirectories mypackage (manual link). However, I have specified the -keepdirectories option and it doesn't seem to be working. I think there is something wrong with my ProGuard configuration. I have also looked at this related question, but I am having trouble getting the -keeppackagenames working as well.

In my code I have something similar to the following.

package com.example.mypackage;
public class MyClass{
    public static void main(String [] args){
        //url is always returned as null
        URL url = MyClass.class.getResource("");
        //do additional stuff including retrieving manifest file
    }
}

ProGuard Configuration

-injars ...
-outjars ...
-libraryjars ...

-dontoptimize
-keepattributes SourceFile,LineNumber,Table,LocalVariable*Table,*Annotation*
-renamesourcefileattribute SourceFile

-repackageclasses
-overloadaggressively

-keep public class com.example.mypackage.MyClass{
    public static void main(java.lang.String[]);
}
-keepdirectories com.example.mypackage,com.example.mypackage.MyClass
-keeppackagenames com.example.mypackage,com.example.mypackage.MyClass

score 7 · Accepted Answer · answered Jun 20 '13 at 00:55

7

ProGuard expects dots in packages names, and slashes in file names and directory names:

-keeppackagenames com.example.mypackage
-keepdirectories  com/example/mypackage

answered Jun 20 '13 at 00:55

Eric Lafortune

45,150
8
114
106

Adding the `/` to `keepdirectories` did the trick! I've marked this as the correct answer. – Gregory Peck Jun 21 '13 at 15:03
Beware! The specified path may not end with a slash: https://sourceforge.net/p/proguard/bugs/521/ – Gili May 06 '14 at 06:45

score 0 · Answer 2 · answered Jun 14 '13 at 20:46

0

I found that I was able to get it working with the following modification to -keepdirectories

-keepdirectories **mypackage**

However, this feels sort of clunky, and while it works, I feel as if there is a better solution out there.

answered Jun 14 '13 at 20:46

Gregory Peck

636
7
22

Using getResource with ProGuard results in null result

2 Answers2