lezer-parser-nix

This is a Nix grammar for the lezer parser system.

The code is licensed under an MIT license.

Dev

To watch & test, with entr installed run npm run watch

usage

• monaco-lezer-parser - use lezer parsers in monaco-editor
  • also has a grammar file for nix: monaco-lezer-parser/grammars/nix.json
• codemirror editor has native support for lezer parsers
  • pro: lightweight, modular
  • con: less mature than monaco-editor

demos

• nixos-config-webui - web editor for nix files
• nix-eval-js - nix interpreter in javascript

similar projects

• codemirror-lang-nix - nix language for codemirror editor
  • syntax.grammar - nix grammar for lezer parser

related

this project is based on

• https://lezer.codemirror.net/docs/guide/#writing-a-grammar
• https://lezer.codemirror.net/docs/ref/
• https://github.com/lezer-parser/clojure/blob/master/src/clojure.grammar
  • hard fork from commit 172cf31
• https://github.com/lezer-parser/javascript/blob/main/src/javascript.grammar
  • https://github.com/lezer-parser/javascript/blob/main/src/tokens.js
• https://github.com/lezer-parser/xml/blob/main/src/tokens.js

other Nix parsers

• https://github.com/cstrahan/tree-sitter-nix/blob/master/grammar.js
  • https://github.com/cstrahan/tree-sitter-nix/blob/master/src/scanner.c
• https://github.com/NixOS/nix/blob/master/src/libexpr/parser.y

Nix language spec

• https://nixos.org/manual/nix/unstable/expressions/expression-language.html
• https://nixos.wiki/wiki/Nix_Expression_Language
• https://nixery.dev/nix-1p.html