rollup.template.mjs

import commonjs from '@rollup/plugin-commonjs'
import typescript from '@rollup/plugin-typescript'
import cleaner from 'rollup-plugin-cleaner'
//import terser from "@rollup/plugin-terser";

function configure (esm, external) {
  return {
    input: 'src/index.ts',
    output: esm
      ? {
          format: 'es',
          dir: 'lib',
          entryFileNames: '[name].mjs',
          sourcemap: true
        }
      : {
          format: 'cjs',
          dir: 'lib',
          entryFileNames: '[name].js',
          sourcemap: true,
          exports: 'auto'
        },
    external: external,
    plugins: esm
      ? [typescript({
          exclude: ["**/__tests__", "**/*.test.ts"]
        }), commonjs()]
      : [
          cleaner({ targets: ['./lib']}),
          typescript({
            exclude: ["**/__tests__", "**/*.test.ts"]
          }),
          commonjs()
          //terser(),
        ]
  }
}
function setExternal (external) {
  return [configure(false, external), configure(true, external)]
}
export default setExternal