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!7

static new Flag taken;
static Android3 android;
static Lock lock = lock();

p {
  android = androidAtPrecisePort(preSpunVMPort(), "A pre-spun VM.", mc());
  if (android != null)
    print("Using primary port!");
  else {
    print("Using regular port.");
    android = makeAndroid3("A pre-spun VM.");
  }
  hideVM();
  taken.waitUntilUp();
}

static S answer(S s, L<S> history) {
  lock lock;
  new Matches m;
  
  if (match3("please start program *", s, m)) {
    final S progID = formatSnippetID(unquote(m.m[0]));
    return startIt(progID, "");
  }
  
  if (match3("please start program * with arguments *", s, m)) {
    final S progID = formatSnippetID(unquote(m.m[0]));
    final S args = unquote(m.m[1]);
    return startIt(progID, args);
  }
  
  if (match3("are you free to start a program?", s))
    ret !taken.isUp() ? "Yes." : "No.";

  ret null;
}

static S startIt(final S progID, S args) {
  lock lock;
  if (taken.isUp()) ret "Sorry, not free anymore.";
  taken.raise();
  
  // Remove my injection (without cleanup) so program becomes first injection
  synchronized(javax()) {
    L injections = (L) get(javax(), 'injectable_programsInjected);
    injections.remove(0);
  }
  
  final S[] splitArgs = toStringArray(codeTokensOnly(javaTok(args))); // yeah this is bad...
  
  thread {
    Class c = hotwire(progID);
    callMain(c, splitArgs);
  }
  
  thread {
    setConsoleTitle(snippetTitle(progID));
  }
  
  if (android != null) {
    android.dispose();
    android = null;
  }
  
  if (usePreSpunVMs()) startPreSpunVM(); // Start another one
  
  unhideVM();

  ret "OK.";
}