Get rid of forest/ folder with this one weird trick

app.js

const Express          = require('express');
const Liana            = require('forest-express-sequelize');
const config           = require('./config');
const models           = require('./models');
const smartCollections = require('./smart-collections');

const app       = Express();
const {Schemas} = Liana;

// - Hijack Schemas.perform to load Liana collections ourselves
//   → definitely prevent forest-express from trapping our errors, YAY!
// - Hijack integrator.defineCollections to throw before apimap updates
//   → prevent deploys from overwriting production layout, YAY!
Schemas._perform = Schemas.perform;
Schemas.perform = function(Implementation, integrator) {
  // Hijack integrator.defineCollections
  integrator._defineCollections = integrator.defineCollections;
  integrator.defineCollections = function() {
    integrator._defineCollections.apply(integrator, arguments);
    if ( process.env.NODE_ENV === 'production' ) {
      throw new Error('You shall not pass!');
    }
  };

  return Schemas._perform.apply(Schemas, arguments).tap(() => {
    // load collections for models
    Object.keys(models).forEach((modelName) => {
      if ('collection' in models[modelName]) {
        Liana.collection( modelName, models[modelName].collection(models) );
      }
    });
    // load smart collections
    Object.keys(smartCollections).forEach((name) => {
      Liana.collection( name, smartCollections[name](models) );
    });
  });
};

/*
 * Forest middleware
 */
app.use(Liana.init({
  sequelize: models.sequelize,
  envSecret: config.FOREST_ENV_SECRET,
  authSecret: config.FOREST_AUTH_SECRET,
}));

module.exports = app;

sample-apartement-collection.js

const {TRASH_SEGMENTS} = require('../../const');

module.exports = function(models) {
  return {
    fields: [{
      field: 'current-clients',
      type: ['String'],
      reference: 'Client.id',
    }],
    actions: [{
      name: 'Restore Apartment',
    }, {
      name: 'Destroy Apartment',
    }],
    segments: TRASH_SEGMENTS.concat([{
      name: 'Lyon',
      scope: 'lyon',
    }, {
      name: 'Montpellier',
      scope: 'montpellier',
    }, {
      name: 'Paris',
      scope: 'paris',
    }]),
  };
};