jfparadis

Rollup demo

Here is how to run the demo after you download the zip file containing this gist.

Native ESM

$ node main.mjs
[Function: foo] [Function: foo] [Function: bar] [Function: bar]

jfparadis

Testing global powers in XS

This test checks the status of global powers, in top level main and in a compartment.

Output

*** Testing from main
new Date(): Thu Jan 23 2020 20:13:36 GMT-0800
Date.now(): 1579839216141

jfparadis

A compartment module resolver function for XS

This gist shows that the compartment module map doesn't have to be deterministic.

On each subsequent run, the module map resolves to different modules depending on the current seconds on the clock.

Output

Example of executing the same code without recompile before the second run:

jfparadis

trace(`Compartment imported\n`);

const XSCompartment = globalThis.Compartment;
trace('Compartment.map: ' + Object.keys(XSCompartment.map)+'\n');

// Mappin utility function.
// Create the child XS map from the parent XS map.
function createXSMap(modules) {
  // Need to at least allow new compartments to be created.
  const result = { Compartment: XSCompartment.map.Compartment };

jfparadis

A Compartment object abstracts the notion of a distinct global environment, with its own global object, copy of the standard library, but shares the "intrinsics" (standard objects that are not bound to global variables, like the initial value of Object.prototype) with the current execution environment.

Compartment Constructor

class Compartment {
  constructor: (
    globals : object?,                  // extra globals added to the global object
    modules: object?,                   // module map, specifier to specifier
  ) -> object,

jfparadis

/*
 * Copyright (c) 2019  Moddable Tech, Inc.
 *
 *   This file is part of the Moddable SDK.
 *
 *   This work is licensed under the
 *       Creative Commons Attribution 4.0 International License.
 *   To view a copy of this license, visit
 *       <http://creativecommons.org/licenses/by/4.0>.
 *   or send a letter to Creative Commons, PO Box 1866,

jfparadis

Compartment dynamic import & multiple imports per compartment

Output

mod1
getting g1: g1 original value
g1 original value
setting g1: g1 original value -> new value 1
mod1 done.
mod2

jfparadis

XS module map vs namespace

Results

1. Module map can only be populated from Compartment map
2. Any attempt to use the namespaces fails

Type check

typeof Compartment.map.mod
// symbol

jfparadis

Keybase proof

I hereby claim:

• I am jfparadis on github.
• I am jfparadis (https://keybase.io/jfparadis) on keybase.
• I have a public key ASB5XxeA-KDrLKr4CvESPvXtBQIfFKHk5zGlNPuE4HF8pwo

To claim this, I am signing this object:

jfparadis

#!/bin/bash

# IMPORTANT: You will need to disable SIP aka Rootless in order to fully execute this script, you can reenable it after.
# WARNING: It might disable things that you may not like. Please double check the services in the TODISABLE vars.

# Get active services: launchctl list | grep -v "\-\t0"
# Find a service: grep -lR [service] /System/Library/Launch* /Library/Launch* ~/Library/LaunchAgents

# Agents to disable
TODISABLE=('com.apple.security.keychainsyncingoveridsproxy' 'com.apple.personad' 'com.apple.passd' 'com.apple.screensharing.MessagesAgent' 'com.apple.CommCenter-osx' 'com.apple.Maps.mapspushd' 'com.apple.Maps.pushdaemon' 'com.apple.photoanalysisd' 'com.apple.telephonyutilities.callservicesd' 'com.apple.AirPlayUIAgent' 'com.apple.AirPortBaseStationAgent' 'com.apple.CalendarAgent' 'com.apple.DictationIM' 'com.apple.iCloudUserNotifications' 'com.apple.familycircled' 'com.apple.familycontrols.useragent' 'com.apple.familynotificationd' 'com.apple.gamed' 'com.apple.icloud.findmydeviced.findmydevi