def filteredSourceDir = file("${buildDir}/filtered")

sourceSets {
    ahem {
        java {
            srcDirs = [file("${buildDir}/sources/java")]
            //include 'com/kbi/qwertech/**'
            exclude 'com/kbi/qwertech/QwerTech.java'
        }
    }
}


// copy the main sources and filter any '$version' occurences.
task processVersion (type: Copy, dependsOn: 'sourceMainJava') {
    inputs.property "version", project.version
    inputs.property "mcversion", project.minecraft.version
    outputs.upToDateWhen { false }
    from "build/sources/java/com/kbi/qwertech/QwerTech.java"
    into filteredSourceDir
    expand 'version':project.version
}

compileJava.dependsOn processVersion

sourceSets {
    // This source set will contain all sources that we filter
    filtered {
        java {
            srcDirs = [sourceSets.ahem.java, filteredSourceDir]
        }
    }
}

// tell the compileJava task to compile the filtered source
compileJava.source = sourceSets.filtered.java