syncthing-android/syncthing/build.gradle

import org.gradle.internal.os.OperatingSystem

task buildNative(type: Exec) {
    outputs.upToDateWhen { false }
    if (OperatingSystem.current().isWindows()) {
        if (!file("../app/src/main/jniLibs").exists()) {
            throw new GradleException('Please run ./build-syncthing.bash via cygwin/MinGW manually')
        }
        executable = 'rundll32' // Does nothing
    } else {
        executable = './build-syncthing.bash'
    }
}

/**
 * Use separate task instead of standard clean(), so these folders aren't deleted by `gradle clean`.
 */
task cleanNative(type: Delete) {
    delete "../app/src/main/jniLibs/"
    delete "gobuild"
}