Generate file to export TypeORM entities in an ts file

create-entities-index.ts

// https://medium.com/@p3rf/solving-issue-with-entities-loading-for-a-nx-dev-monorepo-setup-with-nest-js-and-typeorm-282d4491f0bc
// npm install --save-dev fast-glob

// ...
// "scripts": {
//   ...
//   "create-entities-index": "ts-node --pretty --project=tools/tsconfig.tools.json tools/create-entities-index.ts",
//   ...
// }

// ...
// import * as entities from '../database/entities-index';
// ...
// @Module({
//   imports: [TypeOrmModule.forRoot({
//     ...
//     entities: Object.values(entities),
//     ...
//   })],
//   ...
// })
// ...

import * as fg from 'fast-glob';
import * as fs from 'fs';
import * as path from 'path';
function createEntitiesIndex() {
  console.log('Creating entity-index.ts for api app');
  const src = `${path.dirname(__dirname)}/apps/api/src`;
  if (!fs.existsSync(src)) {
    console.log(`App api cannot be found. Path not exist: ${src}`);
    process.exit(1);
  }
  const outDir = `${src}/database`;
  const tmpFile = `${outDir}/tmp-entities-index.ts`;
  const outFile = `${outDir}/entities-index.ts`;
  if (!fs.existsSync(outDir)) {
    fs.mkdirSync(outDir);
  }
  for (const item of fg.sync(`${src}/**/*.entity.ts`)) {
    const filePath = path.relative(outDir, item).replace(/\.ts$/, '');
    const data = `export * from '${filePath}'\n`;
    fs.writeFileSync(tmpFile, data, { flag: 'a+' });
  }
  if (fs.existsSync(outFile) && fs.existsSync(tmpFile)) {
    fs.unlinkSync(outFile);
    console.log(`Old file '${outFile}' removed`);
  }
  if (fs.existsSync(tmpFile)) {
    fs.renameSync(tmpFile, outFile);
    console.log(`New file ${outFile} saved`);
  }
}
createEntitiesIndex();