Transpile lisp to JS with Grunt

Read the Grunt getting started guide. Add the dependecy to your package.json:

"devDependencies": {
  "@javanut13/grunt-lisp.js": "0.0.3",
  "grunt": "^0.4.5"
}

Add the task config in your Gruntfile:

lisp_js: {
  options: {
    extension: 'lsp',
    cut: 'src/',
    extend: require('./test/extend')
  },
  src: [
    'src/**/*.lsp'
  ],
  dest: 'build/'
},
...
grunt.loadNpmTasks('@javanut13/grunt-lisp.js');

All the files in the src will be transpiled and output to the dest folder in the same structure as the input. If the exension of the file matches the extension option it will be removed from the filename before adding .js. The cut option lets you remove a part of the path when outputting to the destination.

The Lisp.js generator can be extended with custom functions. A function should be passed in that will be used to add definitions to the language. These can obviously be in a separate file and require-ed. For example:

module.exports = function(lisp) {
  lisp.extend('not', function(items) {
    return '(!' + this.get(items[0]) + ')';
  });
}

You can use watch to run Lisp.js whenever you edit a lisp file:

watch: {
  scripts: {
    files: ['src/**/*.lsp'],
    tasks: ['lisp_js'],
    options: {
      spawn: false,
    },
  },
}
...
grunt.loadNpmTasks('grunt-contrib-watch');

Then run grunt watch and nodemon build/server.js (nodemon) to auto-restart the server when the files are transpiled.