debug.gradle

/**
 * This code is only meant for debugging and exploring what is happening when the build runs.
 * You should not use it unless you want to understand the internals of anroid build system.
 */

afterEvaluate {
    tasks.each {
        task ->
            task << {
                checkNewFiles()
            }
            println task
    }
}

ext.oldlist = new ArrayList<String>()

void checkNewFiles() {
    checkNewFiles(true)
}

void checkNewFiles(boolean print) {
    List<String> newlist = new ArrayList<>();
    readFileTree(file("build"), newlist)
    for (String path : newlist) {
        if (print && !oldlist.contains(path)) {
            println "=== ADD: " + path
        }
    }
    for (String path : oldlist) {
        if (!newlist.contains(path)) {
            println "=== SUB: " + path
        }
    }
    oldlist.clear();
    oldlist.addAll(newlist)
}

void readFileTree(File d, List l) {
    for (File f : d.listFiles()) {
        l.add(f.absolutePath)
        if (f.isDirectory()) {
            readFileTree(f, l)
        }
    }
}