Change to improve development process

- use local build script instead of xcratch-build
- build automatically
- use local setup script instead of xcratch-register
- no modify scratch-vm/scratch-gui
- eslint according to origin
- test using Mocha

.eslintignore

@@ -0,0 +1,5 @@
+coverage/*
+dist/*
+node_modules/*
+playground/*
+benchmark/*

.gitignore

@@ -1 +1,5 @@
-/node_modules
+node_modules/
+
+src/vm/*
+!src/vm/extensions/
+!src/vm/.*

.mocharc.js

@@ -0,0 +1,4 @@
+module.exports = {
+  require: ["@babel/register", "./test/setup-test.js"],
+  spec: "test/unit/**/*.test.js",
+};

LICENSE

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2021 Koji Yokokawa
+Copyright (c) 2021-2024 Koji Yokokawa
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -23,12 +23,18 @@ https://xcratch.github.io/xcx-example/dist/xcratchExample.mjs
 
 ## Development
 
-### Register on the local Xcratch
+### Install Dependencies
 
-Run register script to install this extension on the local Xcratch for testing.
+```sh
+npm install
+```
+
+### Setup Development Environment
+
+Change ```vmSrcOrg``` to your local ```scratch-vm``` directory in ```./scripts/setup-dev.js``` then run setup-dev script to setup development environment.
 
 ```sh
-npm run register
+npm run setup-dev
 ```
 
 ### Bundle into a Module
@@ -39,12 +45,20 @@ Run build script to bundle this extension into a module file which could be load
 npm run build
 ```
 
-### Linting
+### Watch and Bundle
 
-Install eslint-config following Scratch team.
+Run watch script to watch the changes of source files and bundle automatically.
 
 ```sh
-npm install
+npm run watch
+```
+
+### Test
+
+Run test script to test this extension.
+
+```sh
+npm run test
 ```
 
 

babel.config.json

@@ -0,0 +1,13 @@
+{
+    "presets": [
+      [
+        "@babel/preset-env",
+        {
+          "targets": {
+            "node": true
+          },
+          "useBuiltIns": "entry"
+        }
+      ]
+    ]
+  }