index.js

"use strict";

exports.__esModule = true;
exports.default = definePolyfillProvider;

var _helperPluginUtils = require("@babel/helper-plugin-utils");

var _helperCompilationTargets = _interopRequireWildcard(require("@babel/helper-compilation-targets"));

var _utils = require("./utils");

var _importsCache = _interopRequireDefault(require("./imports-cache"));

var _debugUtils = require("./debug-utils");

var _normalizeOptions = require("./normalize-options");

var v = _interopRequireWildcard(require("./visitors"));

var deps = _interopRequireWildcard(require("./node/dependencies"));

var _metaResolver = _interopRequireDefault(require("./meta-resolver"));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }

function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }

function _objectWithoutPropertiesLoose(source, excluded) { if (source == null) return {}; var target = {}; var sourceKeys = Object.keys(source); var key, i; for (i = 0; i < sourceKeys.length; i++) { key = sourceKeys[i]; if (excluded.indexOf(key) >= 0) continue; target[key] = source[key]; } return target; }

const getTargets = _helperCompilationTargets.default.default || _helperCompilationTargets.default;

function resolveOptions(options, babelApi) {
  const {
    method,
    targets: targetsOption,
    ignoreBrowserslistConfig,
    configPath,
    debug,
    shouldInjectPolyfill,
    absoluteImports
  } = options,
        providerOptions = _objectWithoutPropertiesLoose(options, ["method", "targets", "ignoreBrowserslistConfig", "configPath", "debug", "shouldInjectPolyfill", "absoluteImports"]);

  let methodName;
  if (method === "usage-global") methodName = "usageGlobal";else if (method === "entry-global") methodName = "entryGlobal";else if (method === "usage-pure") methodName = "usagePure";else if (typeof method !== "string") {
    throw new Error(".method must be a string");
  } else {
    throw new Error(`.method must be one of "entry-global", "usage-global"` + ` or "usage-pure" (received ${JSON.stringify(method)})`);
  }

  if (typeof shouldInjectPolyfill === "function") {
    if (options.include || options.exclude) {
      throw new Error(`.include and .exclude are not supported when using the` + ` .shouldInjectPolyfill function.`);
    }
  } else if (shouldInjectPolyfill != null) {
    throw new Error(`.shouldInjectPolyfill must be a function, or undefined` + ` (received ${JSON.stringify(shouldInjectPolyfill)})`);
  }

  if (absoluteImports != null && typeof absoluteImports !== "boolean" && typeof absoluteImports !== "string") {
    throw new Error(`.absoluteImports must be a boolean, a string, or undefined` + ` (received ${JSON.stringify(absoluteImports)})`);
  }

  let targets;

  if ( // If any browserslist-related option is specified, fallback to the old
  // behavior of not using the targets specified in the top-level options.
  targetsOption || configPath || ignoreBrowserslistConfig) {
    const targetsObj = typeof targetsOption === "string" || Array.isArray(targetsOption) ? {
      browsers: targetsOption
    } : targetsOption;
    targets = getTargets(targetsObj, {
      ignoreBrowserslistConfig,
      configPath
    });
  } else {
    targets = babelApi.targets();
  }

  return {
    method,
    methodName,
    targets,
    absoluteImports: absoluteImports != null ? absoluteImports : false,
    shouldInjectPolyfill,
    debug: !!debug,
    providerOptions: providerOptions
  };
}

function instantiateProvider(factory, options, missingDependencies, dirname, debugLog, babelApi) {
  const {
    method,
    methodName,
    targets,
    debug,
    shouldInjectPolyfill,
    providerOptions,
    absoluteImports
  } = resolveOptions(options, babelApi);
  const getUtils = (0, _utils.createUtilsGetter)(new _importsCache.default(moduleName => deps.resolve(dirname, moduleName, absoluteImports))); // eslint-disable-next-line prefer-const

  let include, exclude;
  let polyfillsSupport;
  let polyfillsNames;
  let filterPolyfills;
  const depsCache = new Map();
  const api = {
    babel: babelApi,
    getUtils,
    method: options.method,
    targets,
    createMetaResolver: _metaResolver.default,

    shouldInjectPolyfill(name) {
      if (polyfillsNames === undefined) {
        throw new Error(`Internal error in the ${factory.name} provider: ` + `shouldInjectPolyfill() can't be called during initialization.`);
      }

      if (!polyfillsNames.has(name)) {
        console.warn(`Internal error in the ${provider.name} provider: ` + `unknown polyfill "${name}".`);
      }

      if (filterPolyfills && !filterPolyfills(name)) return false;
      let shouldInject = (0, _helperCompilationTargets.isRequired)(name, targets, {
        compatData: polyfillsSupport,
        includes: include,
        excludes: exclude
      });

      if (shouldInjectPolyfill) {
        shouldInject = shouldInjectPolyfill(name, shouldInject);

        if (typeof shouldInject !== "boolean") {
          throw new Error(`.shouldInjectPolyfill must return a boolean.`);
        }
      }

      return shouldInject;
    },

    debug(name) {
      debugLog().found = true;
      if (!debug || !name) return;
      if (debugLog().polyfills.has(provider.name)) return;
      debugLog().polyfills.set(name, polyfillsSupport && name && polyfillsSupport[name]);
    },

    assertDependency(name, version = "*") {
      if (missingDependencies === false) return;

      if (absoluteImports) {
        // If absoluteImports is not false, we will try resolving
        // the dependency and throw if it's not possible. We can
        // skip the check here.
        return;
      }

      const dep = version === "*" ? name : `${name}@^${version}`;
      const found = missingDependencies.all ? false : mapGetOr(depsCache, `${name} :: ${dirname}`, () => deps.has(dirname, name));

      if (!found) {
        debugLog().missingDeps.add(dep);
      }
    }

  };
  const provider = factory(api, providerOptions, dirname);

  if (typeof provider[methodName] !== "function") {
    throw new Error(`The "${provider.name || factory.name}" provider doesn't ` + `support the "${method}" polyfilling method.`);
  }

  if (Array.isArray(provider.polyfills)) {
    polyfillsNames = new Set(provider.polyfills);
    filterPolyfills = provider.filterPolyfills;
  } else if (provider.polyfills) {
    polyfillsNames = new Set(Object.keys(provider.polyfills));
    polyfillsSupport = provider.polyfills;
    filterPolyfills = provider.filterPolyfills;
  } else {
    polyfillsNames = new Set();
  }

  ({
    include,
    exclude
  } = (0, _normalizeOptions.validateIncludeExclude)(provider.name || factory.name, polyfillsNames, providerOptions.include || [], providerOptions.exclude || []));
  return {
    debug,
    method,
    targets,
    provider,

    callProvider(payload, path) {
      const utils = getUtils(path); // $FlowIgnore

      provider[methodName](payload, utils, path);
    }

  };
}

function definePolyfillProvider(factory) {
  return (0, _helperPluginUtils.declare)((babelApi, options, dirname) => {
    babelApi.assertVersion(7);
    const {
      traverse
    } = babelApi;
    let debugLog;
    const missingDependencies = (0, _normalizeOptions.applyMissingDependenciesDefaults)(options, babelApi);
    const {
      debug,
      method,
      targets,
      provider,
      callProvider
    } = instantiateProvider(factory, options, missingDependencies, dirname, () => debugLog, babelApi);
    const createVisitor = method === "entry-global" ? v.entry : v.usage;
    const visitor = provider.visitor ? traverse.visitors.merge([createVisitor(callProvider), provider.visitor]) : createVisitor(callProvider);

    if (debug && debug !== _debugUtils.presetEnvSilentDebugHeader) {
      console.log(`${provider.name}: \`DEBUG\` option`);
      console.log(`\nUsing targets: ${(0, _debugUtils.stringifyTargetsMultiline)(targets)}`);
      console.log(`\nUsing polyfills with \`${method}\` method:`);
    }

    return {
      name: "inject-polyfills",
      visitor,

      pre() {
        var _provider$pre;

        debugLog = {
          polyfills: new Map(),
          found: false,
          providers: new Set(),
          missingDeps: new Set()
        }; // $FlowIgnore - Flow doesn't support optional calls

        (_provider$pre = provider.pre) == null ? void 0 : _provider$pre.apply(this, arguments);
      },

      post() {
        var _provider$post;

        // $FlowIgnore - Flow doesn't support optional calls
        (_provider$post = provider.post) == null ? void 0 : _provider$post.apply(this, arguments);

        if (missingDependencies !== false) {
          if (missingDependencies.log === "per-file") {
            deps.logMissing(debugLog.missingDeps);
          } else {
            deps.laterLogMissing(debugLog.missingDeps);
          }
        }

        if (!debug) return;
        if (this.filename) console.log(`\n[${this.filename}]`);

        if (debugLog.polyfills.size === 0) {
          console.log(method === "entry-global" ? debugLog.found ? `Based on your targets, the ${provider.name} polyfill did not add any polyfill.` : `The entry point for the ${provider.name} polyfill has not been found.` : `Based on your code and targets, the ${provider.name} polyfill did not add any polyfill.`);
          return;
        }

        if (method === "entry-global") {
          console.log(`The ${provider.name} polyfill entry has been replaced with ` + `the following polyfills:`);
        } else {
          console.log(`The ${provider.name} polyfill added the following polyfills:`);
        }

        for (const [name, support] of debugLog.polyfills) {
          if (support) {
            const filteredTargets = (0, _helperCompilationTargets.getInclusionReasons)(name, targets, support);
            const formattedTargets = JSON.stringify(filteredTargets).replace(/,/g, ", ").replace(/^\{"/, '{ "').replace(/"\}$/, '" }');
            console.log(`  ${name} ${formattedTargets}`);
          } else {
            console.log(`  ${name}`);
          }
        }
      }

    };
  });
}

function mapGetOr(map, key, getDefault) {
  let val = map.get(key);

  if (val === undefined) {
    val = getDefault();
    map.set(key, val);
  }

  return val;
}