Adding global variables functions to nunjucks

add-global-variables-to-nunjucks.js

// Create express server
const app = express();

// Create nunjucks fileloader instance for the views folder
const nunjucksFileLoader = new nunjucks.FileSystemLoader(path.resolve('/path/to/views/folder'), {
  noCache: true,
});

// Create a nunjucks instance to be used for the view engine
// This instance can be used to add filters and globals
let env = new nunjucks.Environment(nunjucksFileLoader, {
  autoescape: false,
  web: {
    useCache: false,
  },
});

// Add lodash as a
// global for view templates
env.addGlobal('_', _);

// Loops through views/parials
// folder and get full path for each file
const getMacroFilePaths = async () => {
  // Creates a promise since the function uses a callback
  return new Promise((resolve, reject) => {
    nodeDir.paths(path.resolve(CONFIG.paths.views.base, 'macros'), (err, paths) => {
      // Handles error
      if (err) {
        // Returns a reject promise response
        return reject(err);
      }
      // Returns a resolved promise resonse
      return resolve(paths.files);
    });
  });
};

// Add all macro file paths to be accessible inside view templates
env.addGlobal('macroFilePaths', await getMacroFilePaths());