Gradle android optimize packagingOptions

Question

I have that project structure:

-gradle root
           |-clients
                    |-client 1
                    |-client 2
                        ... 
                    |-client N
           |-libs
                    |-android lib 1
                    |-android lib 2
                        ...
                    |-android lib N
                    |-java lib 1
                    |-java lib 2
                        ...     
                    |-java lib N

In each client build file I have the packagingOptions to exclude options. Something like that:

packagingOptions {
    exclude 'META-INF/DEPENDENCIES.txt'
    exclude 'META-INF/NOTICE'
    exclude 'META-INF/NOTICE.txt'
    exclude 'META-INF/LICENSE'
    exclude 'META-INF/LICENSE.txt'
}

How could I optimize that block and move it for example in my root gradle build file? I don't really want to copy paste it across all clients.

Answer 1

Found solution. Credits: https://github.com/frankdu/android-gradle-dagger-tutorial

I've created separate build file and moved that settings there. File android_common.gradle

android {
    packagingOptions {
        exclude 'META-INF/DEPENDENCIES.txt'
        exclude 'META-INF/NOTICE'
        exclude 'META-INF/NOTICE.txt'
        exclude 'META-INF/LICENSE'
        exclude 'META-INF/LICENSE.txt'
    }
}

Then in each client put that line:

apply from: "${rootDir}/android_common.gradle"

And finally excluded packagingOptions from my clients build files. In additional I've moved another common configurations there. Looks clean, simple and nice after that.

Answer 2

For the record, most of your package options are already the default.

See PackagingOptions Gradle documentation

Pick first: none
Merge: /META-INF/services/**
Exclude:
/META-INF/LICENSE
/META-INF/LICENSE.txt
/META-INF/NOTICE
/META-INF/NOTICE.txt
/LICENSE
/LICENSE.txt
/NOTICE
/NOTICE.txt
/META-INF/*.DSA (all DSA signature files)
/META-INF/*.EC (all EC signature files)
/META-INF/*.SF (all signature files)
/META-INF/*.RSA (all RSA signature files)
/META-INF/maven/** (all files in the maven meta inf directory)
/META-INF/proguard/* (all files in the proguard meta inf directory)
**/.svn/** (all .svn directory contents)
**/CVS/** (all CVS directory contents)
**/SCCS/** (all SCCS directory contents)
**/.* (all UNIX hidden files)
**/.*/** (all contents of UNIX hidden directories)
**/*~ (temporary files)
**/thumbs.db
**/picasa.ini
**/protobuf.meta
**/about.html
**/package.html
**/overview.html
**/_*
**/_*/**

Answer 3

For those who cant find fresh documentation link for PackagingOptions.

This must be comment to LanDenLabs answer but I cant post a comment without 50 rep :(