create-expo-cljs-app/template/node_modules/metro-babel-transformer/src/index.js

Create a react native application with Expo and Shadow-CLJS!

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *
 * @format
 */
"use strict";

const nullthrows = require("nullthrows");

const _require = require("@babel/core"),
  parseSync = _require.parseSync,
  transformFromAstSync = _require.transformFromAstSync;

const _require2 = require("metro-source-map"),
  generateFunctionMap = _require2.generateFunctionMap;

function transform(_ref) {
  let filename = _ref.filename,
    options = _ref.options,
    plugins = _ref.plugins,
    src = _ref.src;
  const OLD_BABEL_ENV = process.env.BABEL_ENV;
  process.env.BABEL_ENV = options.dev
    ? "development"
    : process.env.BABEL_ENV || "production";

  try {
    const babelConfig = {
      caller: {
        name: "metro",
        bundler: "metro",
        platform: options.platform
      },
      ast: true,
      babelrc: options.enableBabelRCLookup,
      code: false,
      highlightCode: true,
      filename,
      plugins,
      sourceType: "module"
    };
    const sourceAst = parseSync(src, babelConfig);

    const _transformFromAstSync = transformFromAstSync(
        sourceAst,
        src,
        babelConfig
      ),
      ast = _transformFromAstSync.ast;

    const functionMap = generateFunctionMap(sourceAst, {
      filename
    });
    return {
      ast: nullthrows(ast),
      functionMap
    };
  } finally {
    if (OLD_BABEL_ENV) {
      process.env.BABEL_ENV = OLD_BABEL_ENV;
    }
  }
}

module.exports = {
  transform
};