esbuild.config.js

const esbuild = require('esbuild')
const { red, cyan, green, dim } = require('kolorist')

// // Automatically exclude all node_modules from the bundled version
const { nodeExternalsPlugin } = require('esbuild-node-externals')

function logChange(metafile) {
  console.log('Detected change in files: ', green(Object.keys(metafile.inputs).join(', ')))
  console.log('Generated output: ', green(Object.keys(metafile.outputs).join(', ')))
  console.log('')
}

esbuild
  .build({
    entryPoints: ['./src/index.ts'],
    outfile: 'dist/index.js',
    bundle: true,
    minify: false,
    metafile: true,
    watch: {
      onRebuild(error, result) {
        if (error) {
          console.error('There was an error rebuilding changes.', error)
          console.log(dim(error.stack))
        } else {
          logChange(result.metafile)
          if (result.errors.length) {
            console.log(red('Erros: '), result.errors)
          }
          if (result.errors.warnings) {
            console.log(cyan('Warnings: '), result.warnings)
          }
        }
      }
    },
    platform: 'node',
    target: 'node14',
    plugins: [
      nodeExternalsPlugin({
        dependencies: false
      })
    ]
  })
  .catch(() => process.exit(1))