!7

p-subst {
  File srcDir = makeTempDir();
  File classesDir = makeTempDir();
  print(classesDir);
  saveTextFile(newFile(srcDir, "main.java"), myJavaSource());
  time {
    compileWholeDir(srcDir, myLibraryFiles(), classesDir);
  }
  deleteDirectory(classesDir, true, false);
}