esbuild.js

#!/usr/bin/env node

import esbuild from 'esbuild';

// Automatically exclude all node_modules from the bundled version
import { nodeExternalsPlugin } from 'esbuild-node-externals';

const build = async () => {
  const bundleCtx = await esbuild.context({
    entryPoints: ['./src/main.ts'],
    outfile: process.env.ESM_BUILD ? 'dist/bundle.js' : 'dist/bundle.cjs',
    bundle: true,
    platform: 'node',
    sourcemap: true,
    target: 'node12',
    format: process.env.ESM_BUILD ? 'esm' : 'cjs',
    minify: true,
    banner: {
      js: process.env.ESM_BUILD
        ? `
        import path from 'path';
        import { fileURLToPath } from 'url';
        import { createRequire as topLevelCreateRequire } from 'module';
        const require = topLevelCreateRequire(import.meta.url);
        const __filename = fileURLToPath(import.meta.url);
        const __dirname = path.dirname(__filename);
        `
        : ``,
    },
    plugins: [
      nodeExternalsPlugin(),
      {
        name: 'watch',
        setup(build) {
          build.onEnd((result) => {
            console.log('===========================================');
            // error if errors array have errors
            if (result.errors.length > 0) {
              console.log(`${new Date().toLocaleString()}: main module build failed.`);
              process.exit(1);
            } else {
              console.log(`${new Date().toLocaleString()}: main module build succeeded.`);
            }
          });
        },
      },
    ],
  });

  const cliCtx = await esbuild.context({
    entryPoints: ['./src/cli.ts'],
    outfile: process.env.ESM_BUILD ? 'dist/cli-bundle.js' : 'dist/cli-bundle.cjs',
    bundle: true,
    platform: 'node',
    sourcemap: true,
    target: 'node12',
    format: process.env.ESM_BUILD ? 'esm' : 'cjs',
    minify: true,
    banner: {
      js: process.env.ESM_BUILD
        ? `
        import path from 'path';
        import { fileURLToPath } from 'url';
        import { createRequire as topLevelCreateRequire } from 'module';
        const require = topLevelCreateRequire(import.meta.url);
        const __filename = fileURLToPath(import.meta.url);
        const __dirname = path.dirname(__filename);
        `
        : ``,
    },
    plugins: [
      nodeExternalsPlugin(),
      {
        name: 'watch',
        setup(build) {
          build.onEnd((result) => {
            console.log('===========================================');
            // error if errors array have errors
            if (result.errors.length > 0) {
              console.log(`${new Date().toLocaleString()}: cli module build failed.`);
              process.exit(1);
            } else {
              console.log(`${new Date().toLocaleString()}: cli module build succeeded.`);
            }
          });
        },
      },
    ],
  });

  if (process.env.NODE_ENV === 'production') {
    await bundleCtx.rebuild();
    bundleCtx.dispose();
    await cliCtx.rebuild();
    cliCtx.dispose();
  } else {
    await bundleCtx.watch();
    await cliCtx.watch();
  }
};

build();