Gradle: adding assets folder dynamically

Question

I have a project with many flavors, for each flavor I have a configuration file which specifies which assets to include.

here is what I have so far:

    applicationVariants.all { variant ->
    variant.outputs.each { output ->
        def config = getFlavourConfig(variant.getFlavorName());
        if(config!=null) {
            if(config.get("font-assets") != null ) {
                config.get("font-assets").each {
                    println it
/*this is not working ->*/ variant.assets.srcDirs += ['src/extensions/assets/'+it]
                }
            }
        }
    }
}

getFlavourConfig parses a gson configuration file. The json has ["font-assets":["fontfolder1","fontfolder2"]

In this line

variant.assets.srcDirs += ['src/extensions/assets/'+it]

I want to add the assets dir to the flavor. Any ideas?

Answer 1

You might be overthinking the work required. Just create the productFlavor then define the flavor's assets.srcDirs. Now we can sit back and let Android's gradle plugin do all the work.

android {
    //...
    productFlavors {
        blah {}
        more {}
    }
    sourceSets {
        blah {
            assets.srcDirs = files(getFlavorConfig(it.name))
        }
        more {
            assets.srcDirs = files(getFlavorConfig(it.name))
        }
    }
}

// simplified method for example
def getFlavorConfig(String str) {
    return ["$projectDir.absolutePath/src/extensions/assets/first", "$projectDir.absolutePath/src/extensions/assets/second"];
}

After the build our files will be where we expect:

$ ls app/build/intermediates/assets/blah/debug/
hello.txt world.txt

$ ls app/build/intermediates/assets/more/debug/
hello.txt world.txt

$ ls app/build/intermediates/assets/blah/release/
hello.txt world.txt

$ ls app/build/intermediates/assets/more/release/
hello.txt world.txt

Answer 2

I ended up using one flavour at a build time and used the following line:

android.sourceSets.main.assets.srcDirs += ['src/extensions/assets/'+it]