This is a rewrite of Tosh, my text-based Scratch project editor.

This version is open-source, with a readable, modern codebase.

Dependencies

• Project player thanks to Nathan's Phosphorus, as before
• Uses Nearley for parsing. (Originally Tosh used a home-grown Earley parser for performance reasons; I've now rolled lots of perf improvements into Nearley :-))
• Uses my optimised lexer Moo
• Uses nearley-reverse for transforming Scratch AST into Tosh code (on load); this is the opposite of parsing, which happens on save/run
• Uses Nathan's v2 for views, model, undo, menus, etc

Current status

• Load/save seems to work

• Importing / compiling scripts is there, but needs extensive testing & improvement

• Measuring scripts is fully implemented & tested (so we can "clean up" when saving to sb2)

• Playing projects seems to work

• No sprite management

• No costume management (nor am I particularly interested in adding this!)

• Highlighting almost works

• Completion is in-progress but goodness it's a difficult problem

Future plans:

• A desktop version for Win/Mac based on my unreleased lightweight Electron clone

Running

git clone --recursive https://github.com/tjvr/tosh2
cd tosh2
echo ';window.P = P' >> phosphorus/phosphorus.js
yarn
yarn grammar && yarn test
yarn start

http://localhost:8080/app/

If someone wants to set up browserify/babelify for bundling, that would be excellent