const path = require('path'); require('dotenv').config({ path: path.resolve(__dirname, '..', '.env') }); const fs = require('fs'); const stylePath = path.resolve(__dirname, '..', 'src', 'assets', 'stylesheets'); const destinationFilename = 'application.css'; let filename; if (process.env.APP_STYLES === 'classic') { filename = 'application.classic.css' } else { filename = 'application.core.css' } fs.copyFileSync(path.resolve(stylePath, filename), path.resolve(stylePath, destinationFilename));