tree-sitter.tree-sitter/lib/binding_web/package.nix

{
  wasm-test-grammars,
  lib,
  buildNpmPackage,
  rustPlatform,
  cargo,
  pkg-config,
  emscripten,
  src,
  version,
  npmDepsHash,
}:
buildNpmPackage {
  inherit src version npmDepsHash;

  pname = "web-tree-sitter";

  nativeBuildInputs = [
    rustPlatform.cargoSetupHook
    cargo
    pkg-config
    emscripten
  ];

  cargoDeps = rustPlatform.importCargoLock {
    lockFile = ../../Cargo.lock;
  };

  # emscripten is super behind here compared to nixpkgs upstream
  doCheck = false;

  postPatch = ''
    cp lib/binding_web/package{,-lock}.json .
    cp LICENSE lib/binding_web/
  '';

  buildPhase = ''
    pushd lib/binding_web

    CJS=true npm run build
    CJS=true npm run build:debug
    npm run build:debug
    npm run build

    popd

    mkdir -p target/release

    for grammar in ${wasm-test-grammars}/*.wasm; do
      if [ -f "$grammar" ]; then
        cp "$grammar" target/release/
      fi
    done
  '';

  checkPhase = ''
    pushd lib/binding_web && npm test && popd
  '';

  preInstall = ''
    mv node_modules lib/binding_web/
    cd lib/binding_web
  '';

  # `postpack` deletes the LICENSE that postPatch staged, and npmInstallHook
  # copies the packed file list afterwards.
  npmPackFlags = [ "--ignore-scripts" ];

  meta = {
    description = "WebAssembly bindings to the Tree-sitter parsing library.";
    longDescription = ''
      web-tree-sitter provides WebAssembly bindings to the Tree-sitter parsing library.
      It can build a concrete syntax tree for a source file and efficiently update
      the syntax tree as the source file is edited. This package provides the WebAssembly bindings
      and a JavaScript API for using them in web browsers
    '';
    homepage = "https://tree-sitter.github.io/tree-sitter";
    changelog = "https://github.com/tree-sitter/tree-sitter/releases/tag/v${version}";
    license = lib.licenses.mit;
    maintainers = with lib.maintainers; [ amaanq ];
    platforms = lib.platforms.all;
  };
}