zengenti-buildstartup-package/src/buildStartup.js

Post-build scripts to generate the startup scripts for any configured environments

const fs = require("fs");
const path = require("path");
const _module = path.basename(__filename);
var buildUtils = require("./start/startup.utils").buildUtils;

var {
  loadConfig,
  makeReplacements,
  readModuleFileSync,
  writeModuleFileSync,
} = buildUtils;

function readDotEnvFiles() {
  var envs = [];
  fs.readdirSync(process.cwd()).forEach((filename) => {
    if (filename.startsWith(".env")) {
      envs.push(filename);
    }
  });
  return envs;
}
try {
  console.log("/* ", _module, "- Building server start scripts for .env* file(s)", "*/");

  // read all files in root called .env* and create separate
  // startup files for all configured environments, so the production
  // bundles can be started with any of these scripts
  var envs = readDotEnvFiles();

  // the base startup template we are going to make environment specific
  // replacements on
  var template = readModuleFileSync(__dirname + "/start/startup.template.js");

  envs.forEach((env) => {
    // for each env we will load the .env.* file into process.env.* variables
    // then make replacements to the template
    var config = loadConfig(env);
    var staticPath = config.STATIC_PATH || "static";

    var clientStartup = makeReplacements(config, template, true)
      .replace(/\s+/g, " ")
      .trim();
    var serverStartup = makeReplacements(config, template);

    if (process.env.dotenv == ".env") {
      // write the 'default' project startup (.env) as just start.js
      // so it is ready to launch with just a default server start script
      // and serve a default client bundle
      writeModuleFileSync("dist/" + staticPath + "/startup.js", clientStartup);
      writeModuleFileSync("dist/server/start.js", serverStartup);
    }

    // write a startup.projectId.alias.js file for the environment alias read from
    // the .env.* file so the script can be used to start the server
    // and serve the bundle configuration for that specific environment
    writeModuleFileSync(
      `dist/server/start.${config.PROJECT.toLowerCase()}.${config.ALIAS.toLowerCase()}.js`,
      serverStartup
    );
  });

  console.log("Deploying server start scripts");
  fs.copyFileSync(__dirname + "/start/start.js", "dist/start.js");
  fs.copyFileSync(
    __dirname + "/start/startup.utils.js",
    "dist/server/startup.utils.js"
  );
  // Copying these new files for the ability to generate a targeted server
  // start script inside the container for an unknown CMS
  fs.copyFileSync(__dirname + "/start/launcher.js", "dist/server/launcher.js");
  fs.copyFileSync(
    __dirname + "/start/startup.template.js",
    "dist/server/startup.template.js"
  );

  console.log("/* 👏 ", _module, "completed successfully", "*/");
} catch (e) {
  console.log("/* !! ", _module, "encountered a problem: ", "*/", e.stack);
}