Esbuild: plugin throws a warning when the entry point doesn't have a default export

[nikolovlazar]

Environment

• node: 23.9.0
• esbuild: 0.25.5
• @sentry/esbuild-plugin: 3.5.0

Steps to Reproduce

Just added the @sentry/esbuild-plugin:

import 'dotenv/config';
import esbuild from 'esbuild';
import { sentryEsbuildPlugin } from '@sentry/esbuild-plugin';

esbuild.build({
  entryPoints: ['index.ts'],
  sourcemap: true,
  bundle: true,
  minify: true,
  platform: 'node',
  outdir: 'dist',
  allowOverwrite: true,
  plugins: [
    sentryEsbuildPlugin({
      authToken: process.env.SENTRY_AUTH_TOKEN,
      org: process.env.SENTRY_ORG,
      project: process.env.SENTRY_PROJECT,
      sourcemaps: {
        filesToDeleteAfterUpload: ['**/*.js.map'],
      },
    }),
  ],
});

If I comment out the plugin the warning is not being displayed. My entry point index.ts file does not have any exports. It's an express.js app so I don't have anything to export.

Expected Result

Not see a warning

Actual Result

I'm getting the following warning when I'm running the build:

▲ [WARNING] Import "default" will always be undefined because there is no matching export in "index.ts" [import-is-undefined]

    index.ts?sentryProxyModule=true:4:44:
      4 │               export default OriginalModule.default;
        ╵                                             ~~~~~~~

[andreiborza]

Hi Lazar, thanks for filing this! Not sure when we'll get to this but this seems like a good first issue for potential outside contributors.