libBuilder.ts

#!/bin/node
import * as fs from 'fs';
import path = require('path');

const removeImports = (s: string) => s.replace(/import\s(\n|\w|{|}|\s|,)*.*;(?! \/\/ keep)/gm, '');
const toTemplateString = (s: string) => '`' + s.replace(/\$\{/gm, '\\${').replace(/`/gm, '\\`') + '`';

const bundleFunctions = () => {
  const baseDirFunctions = path.join(process.cwd(), 'packages/graphql-zeus-core/TreeToTS/functions');
  const baseDir = path.join(baseDirFunctions, 'new');
  const directories = fs.readdirSync(baseDir);
  const allFunctions = directories
    .filter((d) => d !== 'mocks.ts')
    .filter((d) => !d.endsWith('spec.ts'))
    .map((d) => path.join(baseDir, d))
    .map((d) => {
      const content = fs.readFileSync(d).toString('utf-8');
      return removeImports(content).replace(/\\/gm, '\\\\').trim();
    });

  const subscriptionDir = path.join(baseDirFunctions, 'apiSubscription');
  const subscriptionFunctions = fs.readdirSync(subscriptionDir).map((file) => {
    // The key is the filename without its extension
    const key = path.basename(file, '.ts');
    const content = fs.readFileSync(path.join(subscriptionDir, file)).toString('utf-8');
    const code = removeImports(content).replace(/\\/gm, '\\\\').trim();
    return [key, code];
  });

  const content = `
  export default ${toTemplateString(allFunctions.join('\n\n'))};

  export const subscriptionFunctions = {${subscriptionFunctions
    .map(([key, value]) => JSON.stringify(key) + ': ' + toTemplateString(value))
    .join(',\n')}}`;

  fs.writeFileSync(path.join(baseDirFunctions, 'generated.ts'), content);
};

bundleFunctions();