build-utils.js

import typescript from "@rollup/plugin-typescript";

const getExternals = (packageJson) => {
  return [
    ...Object.keys(packageJson.dependencies || {}),
    ...Object.keys(packageJson.peerDependencies || {}),
  ];
};

export const buildConfig = ({ packageJson }) => {
  const external = getExternals(packageJson);
  if (!external.includes("graphql")) external.push("graphql");
  return {
    input: "src/index.ts",
    output: [
      {
        dir: "dist",
        format: "es",
      },
      {
        file: "dist/index.cjs",
        format: "cjs",
      },
    ],
    plugins: [
      typescript({
        tsconfig: "./tsconfig.build.json",
        declaration: false,
      }),
    ],
    external,
  };
};