Items in [] may be unnecessary after upstreaming.

Install SSH key for access to raspberrypi-ui GitHub

bash <(curl -sL https://raw.githubusercontent.com/node-red/linux-installers/master/deb/update-nodejs-and-nodered) (run without local repo overrides)

sudo apt install closure-compiler

git clone [email protected]:raspberrypi-ui/scratch-gui.git

git clone https://github.com/LLK/scratch-desktop.git

npm install

In scripts/electron-builder-wrapper.js, add the section

case 'linux':
    return ['appimage'];

to the calculateTargets function, and (for 32-bit ARM builds only), change the relevant line in the getPlatformFlag function to

case 'linux': return '--linux --armv7l';

In electron-builder.yaml, add a section

linux:
  target: dir

rm -rf scratch-gui

git clone https://github.com/LLK/scratch-gui.git

git checkout scratch-desktop

cp -r ~/scratch-gui/src/lib/libraries/extensions/* src/lib/libraries/extensions/

In package.json, in the "devDependencies" section, remove the line starting “chromedriver”

npm install

[cp ~/scratch-gui/node_modules/scratch-blocks/blocks_common/* blocks_common/]

[cp ~/scratch-gui/node_modules/scratch-blocks/core/* core/]

[In package.json, in the "devDependencies" section, remove the line starting “chromedriver”]

[npm install (ignore errors at end)]

In package.json, replace "browser" section with

"browser": {
    "fs": false,
    "child_process": false
},

npm install

cp -r ~/scratch-gui/node_modules/scratch-vm/src/extensions/* src/extensions/

cp ~/scratch-gui/node_modules/scratch-vm/src/extension-support/* src/extension-support/

[cp ~/scratch-gui/node_modules/scratch-vm/src/engine/* src/engine/]

npm run build

npm run build

npm run dist

Built standalone files will be in dist/linux-arm??-unpacked