test-repo/tests_config/require_standalone.js

"use strict";

const fs = require("fs");
const path = require("path");
const vm = require("vm");

const sources = [
  "standalone.js",
  "parser-babylon.js",
  "parser-flow.js",
  "parser-typescript.js",
  "parser-postcss.js",
  "parser-graphql.js",
  "parser-markdown.js",
  "parser-vue.js",
  "parser-yaml.js"
].map(filename =>
  fs.readFileSync(path.join(process.env.PRETTIER_DIR, filename), "utf-8")
);

const sandbox = vm.createContext();
vm.runInContext(sources.join(";"), sandbox);

// TODO: maybe expose (and write tests) for `format`, `utils`, and
// `__debug` methods
module.exports = {
  formatWithCursor(input, options) {
    return vm.runInNewContext(
      `prettier.formatWithCursor(
        $$$input,
        Object.assign({ plugins: prettierPlugins }, $$$options)
      );`,
      Object.assign({ $$$input: input, $$$options: options }, sandbox)
    );
  },

  __debug: {
    parse(input, options, massage) {
      return vm.runInNewContext(
        `prettier.__debug.parse(
          $$$input,
          Object.assign({ plugins: prettierPlugins }, $$$options),
          ${JSON.stringify(massage)}
        );`,
        Object.assign({ $$$input: input, $$$options: options }, sandbox)
      );
    }
  }
};