tsup.config.ts

// tsup.config.ts
import { defineConfig } from 'tsup';
import * as preset from 'tsup-preset-solid';

const preset_options: preset.PresetOptions = {
  // array or single object
  entries: [
    // default entry (index)
    {
      // entries with '.tsx' extension will have `solid` export condition generated
      entry: 'src/index.tsx',
    },
  ],
  // Set to `true` to remove all `console.*` calls and `debugger` statements in prod builds
  drop_console: true,
  // Set to `true` to generate a CommonJS build alongside ESM
  cjs: true,
};

export default defineConfig((config) => {
  const watching = !!config.watch;

  const parsed_data = preset.parsePresetOptions(preset_options, watching);

  if (!watching) {
    const package_fields = preset.generatePackageExports(parsed_data);

    console.log(
      `\npackage.json: \n${JSON.stringify(package_fields, null, 2)}\n\n`,
    );

    /*
            will update ./package.json with the correct export fields
        */
    preset.writePackageJson(package_fields);
  }

  return preset.generateTsupOptions(parsed_data);
});