tree-sitter-cue

Cue grammar for tree-sitter.

Development

This project uses Nix flakes to provide a reproducible development environment with tree-sitter, node, bc, and python3. You need Nix with flakes and nix-command experimental features enabled (see Nix flakes - Enable flakes).

nix develop
npm install

After modifying grammar.js, regenerate the parser and run tests:

tree-sitter generate
tree-sitter test

Testing

# Run all tests (corpus tests + parse real CUE files)
npm test

# Run only tree-sitter corpus tests
tree-sitter test

# Parse example CUE files from cue-lang/cue
script/parse-examples

# Lint grammar.js
npm run lint

Editor Setup

Neovim

Using lazy.nvim

return {
  "nvim-treesitter/nvim-treesitter",
  build = ":TSUpdate",
  event = { "BufReadPost", "BufNewFile" },
  --- @type TSConfig
  opts = {
    ensure_installed = {
      "cue",
    },
  },
  ---@param opts TSConfig
    config = function(_, opts)
      require("nvim-treesitter.configs").setup(opts)
    end,
}