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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

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text-based Scratch project editor, Take Two.

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