rollup.config.js

// @flow
/* eslint-disable import/no-dynamic-require */

import babel from "rollup-plugin-babel";
import commonjs from "rollup-plugin-commonjs";
import globby from "globby";
import pascalCase from "pascal-case";
import resolve from "rollup-plugin-node-resolve";

// $FlowFixMe
const pkg = require(`${process.cwd()}/package.json`);

const dirs = {
  input: "src",
  output: "dist",
  compat: "compat"
};

const plugins = {
  babel: babel({
    configFile: "../../.babelrc",
    exclude: ["node_modules/**", "../../node_modules/**"],
    runtimeHelpers: true
  }),
  commonjs: commonjs({
    namedExports: {
      "apollo-utilities": [
        "addTypenameToDocument",
        "argumentsObjectFromField",
        "assign",
        "checkDocument",
        "cloneDeep",
        "createFragmentMap",
        "flattenSelections",
        "getDefaultValues",
        "getDirectiveInfoFromField",
        "getDirectiveNames",
        "getEnv",
        "getFragmentDefinition",
        "getFragmentDefinitions",
        "getFragmentQueryDocument",
        "getMainDefinition",
        "getMutationDefinition",
        "getOperationDefinition",
        "getOperationDefinitionOrDie",
        "getOperationName",
        "getQueryDefinition",
        "getStoreKeyName",
        "graphQLResultHasError",
        "hasDirectives",
        "isDevelopment",
        "isEnv",
        "isEqual",
        "isField",
        "isIdValue",
        "isInlineFragment",
        "isJsonValue",
        "isNumberValue",
        "isProduction",
        "isScalarValue",
        "isTest",
        "maybeDeepFreeze",
        "removeConnectionDirectiveFromDocument",
        "removeDirectivesFromDocument",
        "resultKeyNameFromField",
        "shouldInclude",
        "storeKeyNameFromField",
        "toIdValue",
        "tryFunctionOrLogError",
        "valueFromNode",
        "valueToObjectRepresentation",
        "variablesInOperation",
        "warnOnceInDevelopment"
      ],
      phoenix: ["Ajax", "Channel", "LongPoll", "Presence", "Socket"]
    }
  }),
  resolve: resolve()
};

const getCjsAndEsConfig = fileName => ({
  input: `${dirs.input}/${fileName}`,
  output: [
    {
      file: `${dirs.output}/${fileName}`,
      format: "es",
      sourcemap: true
    },
    {
      file: `${dirs.compat}/cjs/${fileName}`,
      format: "cjs",
      sourcemap: true
    }
  ],
  plugins: [plugins.babel]
});

const sources = globby.sync("**/*js", {cwd: dirs.input});

// eslint-disable-next-line no-unused-vars
const getUnscopedName = pkg => {
  const [scope, name] = pkg.name.split("/");

  return pascalCase(scope) + pascalCase(name);
};

export default [
  {
    input: `${dirs.input}/index.js`,
    output: {
      file: `${dirs.compat}/umd/index.js`,
      format: "umd",
      name: pascalCase(getUnscopedName(pkg)),
      sourcemap: true
    },
    plugins: [plugins.babel, plugins.resolve, plugins.commonjs]
  },
  ...sources.map(getCjsAndEsConfig)
];