15 files changed, 937 insertions, 0 deletions
diff --git a/node_modules/webpack-chain/src/Chainable.js b/node_modules/webpack-chain/src/Chainable.js
new file mode 100644
index 00000000..f5704ae4
--- /dev/null
+++ b/node_modules/webpack-chain/src/Chainable.js
@@ -0,0 +1,14 @@
+module.exports = class {
+  constructor(parent) {
+    this.parent = parent;
+  }
+
+  batch(handler) {
+    handler(this);
+    return this;
+  }
+
+  end() {
+    return this.parent;
+  }
+};
diff --git a/node_modules/webpack-chain/src/ChainedMap.js b/node_modules/webpack-chain/src/ChainedMap.js
new file mode 100644
index 00000000..d7dff756
--- /dev/null
+++ b/node_modules/webpack-chain/src/ChainedMap.js
@@ -0,0 +1,151 @@
+const merge = require('deepmerge');
+const Chainable = require('./Chainable');
+
+module.exports = class extends Chainable {
+  constructor(parent) {
+    super(parent);
+    this.store = new Map();
+  }
+
+  extend(methods) {
+    this.shorthands = methods;
+    methods.forEach(method => {
+      this[method] = value => this.set(method, value);
+    });
+    return this;
+  }
+
+  clear() {
+    this.store.clear();
+    return this;
+  }
+
+  delete(key) {
+    this.store.delete(key);
+    return this;
+  }
+
+  order() {
+    const entries = [...this.store].reduce((acc, [key, value]) => {
+      acc[key] = value;
+      return acc;
+    }, {});
+    const names = Object.keys(entries);
+    const order = [...names];
+
+    names.forEach(name => {
+      if (!entries[name]) {
+        return;
+      }
+
+      const { __before, __after } = entries[name];
+
+      if (__before && order.includes(__before)) {
+        order.splice(order.indexOf(name), 1);
+        order.splice(order.indexOf(__before), 0, name);
+      } else if (__after && order.includes(__after)) {
+        order.splice(order.indexOf(name), 1);
+        order.splice(order.indexOf(__after) + 1, 0, name);
+      }
+    });
+
+    return { entries, order };
+  }
+
+  entries() {
+    const { entries, order } = this.order();
+
+    if (order.length) {
+      return entries;
+    }
+
+    return undefined;
+  }
+
+  values() {
+    const { entries, order } = this.order();
+
+    return order.map(name => entries[name]);
+  }
+
+  get(key) {
+    return this.store.get(key);
+  }
+
+  getOrCompute(key, fn) {
+    if (!this.has(key)) {
+      this.set(key, fn());
+    }
+    return this.get(key);
+  }
+
+  has(key) {
+    return this.store.has(key);
+  }
+
+  set(key, value) {
+    this.store.set(key, value);
+    return this;
+  }
+
+  merge(obj, omit = []) {
+    Object.keys(obj).forEach(key => {
+      if (omit.includes(key)) {
+        return;
+      }
+
+      const value = obj[key];
+
+      if (
+        (!Array.isArray(value) && typeof value !== 'object') ||
+        value === null ||
+        !this.has(key)
+      ) {
+        this.set(key, value);
+      } else {
+        this.set(key, merge(this.get(key), value));
+      }
+    });
+
+    return this;
+  }
+
+  clean(obj) {
+    return Object.keys(obj).reduce((acc, key) => {
+      const value = obj[key];
+
+      if (value === undefined) {
+        return acc;
+      }
+
+      if (Array.isArray(value) && !value.length) {
+        return acc;
+      }
+
+      if (
+        Object.prototype.toString.call(value) === '[object Object]' &&
+        !Object.keys(value).length
+      ) {
+        return acc;
+      }
+
+      acc[key] = value;
+
+      return acc;
+    }, {});
+  }
+
+  when(
+    condition,
+    whenTruthy = Function.prototype,
+    whenFalsy = Function.prototype
+  ) {
+    if (condition) {
+      whenTruthy(this);
+    } else {
+      whenFalsy(this);
+    }
+
+    return this;
+  }
+};
diff --git a/node_modules/webpack-chain/src/ChainedSet.js b/node_modules/webpack-chain/src/ChainedSet.js
new file mode 100644
index 00000000..ea469daa
--- /dev/null
+++ b/node_modules/webpack-chain/src/ChainedSet.js
@@ -0,0 +1,55 @@
+const Chainable = require('./Chainable');
+
+module.exports = class extends Chainable {
+  constructor(parent) {
+    super(parent);
+    this.store = new Set();
+  }
+
+  add(value) {
+    this.store.add(value);
+    return this;
+  }
+
+  prepend(value) {
+    this.store = new Set([value, ...this.store]);
+    return this;
+  }
+
+  clear() {
+    this.store.clear();
+    return this;
+  }
+
+  delete(value) {
+    this.store.delete(value);
+    return this;
+  }
+
+  values() {
+    return [...this.store];
+  }
+
+  has(value) {
+    return this.store.has(value);
+  }
+
+  merge(arr) {
+    this.store = new Set([...this.store, ...arr]);
+    return this;
+  }
+
+  when(
+    condition,
+    whenTruthy = Function.prototype,
+    whenFalsy = Function.prototype
+  ) {
+    if (condition) {
+      whenTruthy(this);
+    } else {
+      whenFalsy(this);
+    }
+
+    return this;
+  }
+};
diff --git a/node_modules/webpack-chain/src/Config.js b/node_modules/webpack-chain/src/Config.js
new file mode 100644
index 00000000..39ea6df0
--- /dev/null
+++ b/node_modules/webpack-chain/src/Config.js
@@ -0,0 +1,176 @@
+const ChainedMap = require('./ChainedMap');
+const ChainedSet = require('./ChainedSet');
+const Resolve = require('./Resolve');
+const ResolveLoader = require('./ResolveLoader');
+const Output = require('./Output');
+const DevServer = require('./DevServer');
+const Plugin = require('./Plugin');
+const Module = require('./Module');
+const Optimization = require('./Optimization');
+const Performance = require('./Performance');
+
+module.exports = class extends ChainedMap {
+  constructor() {
+    super();
+    this.devServer = new DevServer(this);
+    this.entryPoints = new ChainedMap(this);
+    this.module = new Module(this);
+    this.node = new ChainedMap(this);
+    this.optimization = new Optimization(this);
+    this.output = new Output(this);
+    this.performance = new Performance(this);
+    this.plugins = new ChainedMap(this);
+    this.resolve = new Resolve(this);
+    this.resolveLoader = new ResolveLoader(this);
+    this.extend([
+      'amd',
+      'bail',
+      'cache',
+      'context',
+      'devtool',
+      'externals',
+      'loader',
+      'mode',
+      'parallelism',
+      'profile',
+      'recordsInputPath',
+      'recordsPath',
+      'recordsOutputPath',
+      'stats',
+      'target',
+      'watch',
+      'watchOptions',
+    ]);
+  }
+
+  static toString(config, { verbose = false, configPrefix = 'config' } = {}) {
+    // eslint-disable-next-line global-require
+    const stringify = require('javascript-stringify');
+
+    return stringify(
+      config,
+      (value, indent, stringify) => {
+        // improve plugin output
+        if (value && value.__pluginName) {
+          const prefix = `/* ${configPrefix}.plugin('${
+            value.__pluginName
+          }') */\n`;
+          const constructorExpression = value.__pluginPath
+            ? // The path is stringified to ensure special characters are escaped
+              // (such as the backslashes in Windows-style paths).
+              `(require(${stringify(value.__pluginPath)}))`
+            : value.__pluginConstructorName;
+
+          if (constructorExpression) {
+            // get correct indentation for args by stringifying the args array and
+            // discarding the square brackets.
+            const args = stringify(value.__pluginArgs).slice(1, -1);
+            return `${prefix}new ${constructorExpression}(${args})`;
+          }
+          return (
+            prefix +
+            stringify(
+              value.__pluginArgs && value.__pluginArgs.length
+                ? { args: value.__pluginArgs }
+                : {}
+            )
+          );
+        }
+
+        // improve rule/use output
+        if (value && value.__ruleNames) {
+          const prefix = `/* ${configPrefix}.module.rule('${
+            value.__ruleNames[0]
+          }')${value.__ruleNames
+            .slice(1)
+            .map(r => `.oneOf('${r}')`)
+            .join('')}${
+            value.__useName ? `.use('${value.__useName}')` : ``
+          } */\n`;
+          return prefix + stringify(value);
+        }
+
+        // shorten long functions
+        if (typeof value === 'function') {
+          if (value.__expression) {
+            return value.__expression;
+          }
+          if (!verbose && value.toString().length > 100) {
+            return `function () { /* omitted long function */ }`;
+          }
+        }
+
+        return stringify(value);
+      },
+      2
+    );
+  }
+
+  entry(name) {
+    return this.entryPoints.getOrCompute(name, () => new ChainedSet(this));
+  }
+
+  plugin(name) {
+    return this.plugins.getOrCompute(name, () => new Plugin(this, name));
+  }
+
+  toConfig() {
+    const entryPoints = this.entryPoints.entries() || {};
+
+    return this.clean(
+      Object.assign(this.entries() || {}, {
+        node: this.node.entries(),
+        output: this.output.entries(),
+        resolve: this.resolve.toConfig(),
+        resolveLoader: this.resolveLoader.toConfig(),
+        devServer: this.devServer.toConfig(),
+        module: this.module.toConfig(),
+        optimization: this.optimization.entries(),
+        plugins: this.plugins.values().map(plugin => plugin.toConfig()),
+        performance: this.performance.entries(),
+        entry: Object.keys(entryPoints).reduce(
+          (acc, key) =>
+            Object.assign(acc, { [key]: entryPoints[key].values() }),
+          {}
+        ),
+      })
+    );
+  }
+
+  toString(options) {
+    return module.exports.toString(this.toConfig(), options);
+  }
+
+  merge(obj = {}, omit = []) {
+    const omissions = [
+      'node',
+      'output',
+      'resolve',
+      'resolveLoader',
+      'devServer',
+      'optimization',
+      'performance',
+      'module',
+    ];
+
+    if (!omit.includes('entry') && 'entry' in obj) {
+      Object.keys(obj.entry).forEach(name =>
+        this.entry(name).merge([].concat(obj.entry[name]))
+      );
+    }
+
+    if (!omit.includes('plugin') && 'plugin' in obj) {
+      Object.keys(obj.plugin).forEach(name =>
+        this.plugin(name).merge(obj.plugin[name])
+      );
+    }
+
+    omissions.forEach(key => {
+      if (!omit.includes(key) && key in obj) {
+        this[key].merge(obj[key]);
+      }
+    });
+
+    return super.merge(obj, [...omit, ...omissions, 'entry', 'plugin']);
+  }
+};
diff --git a/node_modules/webpack-chain/src/DevServer.js b/node_modules/webpack-chain/src/DevServer.js
new file mode 100644
index 00000000..23c13639
--- /dev/null
+++ b/node_modules/webpack-chain/src/DevServer.js
@@ -0,0 +1,68 @@
+const ChainedMap = require('./ChainedMap');
+const ChainedSet = require('./ChainedSet');
+
+module.exports = class extends ChainedMap {
+  constructor(parent) {
+    super(parent);
+
+    this.allowedHosts = new ChainedSet(this);
+
+    this.extend([
+      'bonjour',
+      'clientLogLevel',
+      'color',
+      'compress',
+      'contentBase',
+      'disableHostCheck',
+      'filename',
+      'headers',
+      'historyApiFallback',
+      'host',
+      'hot',
+      'hotOnly',
+      'https',
+      'info',
+      'inline',
+      'lazy',
+      'noInfo',
+      'open',
+      'openPage',
+      'overlay',
+      'pfx',
+      'pfxPassphrase',
+      'port',
+      'proxy',
+      'progress',
+      'public',
+      'publicPath',
+      'quiet',
+      'setup',
+      'socket',
+      'staticOptions',
+      'stats',
+      'stdin',
+      'useLocalIp',
+      'watchContentBase',
+      'watchOptions',
+    ]);
+  }
+
+  toConfig() {
+    return this.clean(
+      Object.assign(
+        {
+          allowedHosts: this.allowedHosts.values(),
+        },
+        this.entries() || {}
+      )
+    );
+  }
+
+  merge(obj, omit = []) {
+    if (!omit.includes('allowedHosts') && 'allowedHosts' in obj) {
+      this.allowedHosts.merge(obj.allowedHosts);
+    }
+
+    return super.merge(obj, ['allowedHosts']);
+  }
+};
diff --git a/node_modules/webpack-chain/src/Module.js b/node_modules/webpack-chain/src/Module.js
new file mode 100644
index 00000000..01993227
--- /dev/null
+++ b/node_modules/webpack-chain/src/Module.js
@@ -0,0 +1,44 @@
+const ChainedMap = require('./ChainedMap');
+const Rule = require('./Rule');
+
+module.exports = class extends ChainedMap {
+  constructor(parent) {
+    super(parent);
+    this.rules = new ChainedMap(this);
+    this.defaultRules = new ChainedMap(this);
+    this.extend(['noParse']);
+  }
+
+  defaultRule(name) {
+    return this.defaultRules.getOrCompute(name, () => new Rule(this, name));
+  }
+
+  rule(name) {
+    return this.rules.getOrCompute(name, () => new Rule(this, name));
+  }
+
+  toConfig() {
+    return this.clean(
+      Object.assign(this.entries() || {}, {
+        defaultRules: this.defaultRules.values().map(r => r.toConfig()),
+        rules: this.rules.values().map(r => r.toConfig()),
+      })
+    );
+  }
+
+  merge(obj, omit = []) {
+    if (!omit.includes('rule') && 'rule' in obj) {
+      Object.keys(obj.rule).forEach(name =>
+        this.rule(name).merge(obj.rule[name])
+      );
+    }
+
+    if (!omit.includes('defaultRule') && 'defaultRule' in obj) {
+      Object.keys(obj.defaultRule).forEach(name =>
+        this.defaultRule(name).merge(obj.defaultRule[name])
+      );
+    }
+
+    return super.merge(obj, ['rule', 'defaultRule']);
+  }
+};
diff --git a/node_modules/webpack-chain/src/Optimization.js b/node_modules/webpack-chain/src/Optimization.js
new file mode 100644
index 00000000..cb061f87
--- /dev/null
+++ b/node_modules/webpack-chain/src/Optimization.js
@@ -0,0 +1,27 @@
+const ChainedMap = require('./ChainedMap');
+
+module.exports = class extends ChainedMap {
+  constructor(parent) {
+    super(parent);
+    this.extend([
+      'concatenateModules',
+      'flagIncludedChunks',
+      'mergeDuplicateChunks',
+      'minimize',
+      'minimizer',
+      'namedChunks',
+      'namedModules',
+      'nodeEnv',
+      'noEmitOnErrors',
+      'occurrenceOrder',
+      'portableRecords',
+      'providedExports',
+      'removeAvailableModules',
+      'removeEmptyChunks',
+      'runtimeChunk',
+      'sideEffects',
+      'splitChunks',
+      'usedExports',
+    ]);
+  }
+};
diff --git a/node_modules/webpack-chain/src/Orderable.js b/node_modules/webpack-chain/src/Orderable.js
new file mode 100644
index 00000000..abb8a079
--- /dev/null
+++ b/node_modules/webpack-chain/src/Orderable.js
@@ -0,0 +1,40 @@
+module.exports = Class =>
+  class extends Class {
+    before(name) {
+      if (this.__after) {
+        throw new Error(
+          `Unable to set .before(${JSON.stringify(
+            name
+          )}) with existing value for .after()`
+        );
+      }
+
+      this.__before = name;
+      return this;
+    }
+
+    after(name) {
+      if (this.__before) {
+        throw new Error(
+          `Unable to set .after(${JSON.stringify(
+            name
+          )}) with existing value for .before()`
+        );
+      }
+
+      this.__after = name;
+      return this;
+    }
+
+    merge(obj, omit = []) {
+      if (obj.before) {
+        this.before(obj.before);
+      }
+
+      if (obj.after) {
+        this.after(obj.after);
+      }
+
+      return super.merge(obj, [...omit, 'before', 'after']);
+    }
+  };
diff --git a/node_modules/webpack-chain/src/Output.js b/node_modules/webpack-chain/src/Output.js
new file mode 100644
index 00000000..296c3674
--- /dev/null
+++ b/node_modules/webpack-chain/src/Output.js
@@ -0,0 +1,39 @@
+const ChainedMap = require('./ChainedMap');
+
+module.exports = class extends ChainedMap {
+  constructor(parent) {
+    super(parent);
+    this.extend([
+      'auxiliaryComment',
+      'chunkCallbackName',
+      'chunkFilename',
+      'chunkLoadTimeout',
+      'crossOriginLoading',
+      'devtoolFallbackModuleFilenameTemplate',
+      'devtoolLineToLine',
+      'devtoolModuleFilenameTemplate',
+      'devtoolNamespace',
+      'filename',
+      'globalObject',
+      'hashDigest',
+      'hashDigestLength',
+      'hashFunction',
+      'hashSalt',
+      'hotUpdateChunkFilename',
+      'hotUpdateFunction',
+      'hotUpdateMainFilename',
+      'jsonpFunction',
+      'library',
+      'libraryExport',
+      'libraryTarget',
+      'path',
+      'pathinfo',
+      'publicPath',
+      'sourceMapFilename',
+      'sourcePrefix',
+      'strictModuleExceptionHandling',
+      'umdNamedDefine',
+      'webassemblyModuleFilename',
+    ]);
+  }
+};
diff --git a/node_modules/webpack-chain/src/Performance.js b/node_modules/webpack-chain/src/Performance.js
new file mode 100644
index 00000000..79c23fa8
--- /dev/null
+++ b/node_modules/webpack-chain/src/Performance.js
@@ -0,0 +1,8 @@
+const ChainedMap = require('./ChainedMap');
+
+module.exports = class extends ChainedMap {
+  constructor(parent) {
+    super(parent);
+    this.extend(['assetFilter', 'hints', 'maxAssetSize', 'maxEntrypointSize']);
+  }
+};
diff --git a/node_modules/webpack-chain/src/Plugin.js b/node_modules/webpack-chain/src/Plugin.js
new file mode 100644
index 00000000..418b32d4
--- /dev/null
+++ b/node_modules/webpack-chain/src/Plugin.js
@@ -0,0 +1,71 @@
+const ChainedMap = require('./ChainedMap');
+const Orderable = require('./Orderable');
+
+module.exports = Orderable(
+  class extends ChainedMap {
+    constructor(parent, name) {
+      super(parent);
+      this.name = name;
+      this.extend(['init']);
+
+      this.init((Plugin, args = []) => {
+        if (typeof Plugin === 'function') {
+          return new Plugin(...args);
+        }
+        return Plugin;
+      });
+    }
+
+    use(plugin, args = []) {
+      return this.set('plugin', plugin).set('args', args);
+    }
+
+    tap(f) {
+      this.set('args', f(this.get('args') || []));
+      return this;
+    }
+
+    merge(obj, omit = []) {
+      if ('plugin' in obj) {
+        this.set('plugin', obj.plugin);
+      }
+
+      if ('args' in obj) {
+        this.set('args', obj.args);
+      }
+
+      return super.merge(obj, [...omit, 'args', 'plugin']);
+    }
+
+    toConfig() {
+      const init = this.get('init');
+      let plugin = this.get('plugin');
+      const args = this.get('args');
+      let pluginPath = null;
+
+      // Support using the path to a plugin rather than the plugin itself,
+      // allowing expensive require()s to be skipped in cases where the plugin
+      // or webpack configuration won't end up being used.
+      if (typeof plugin === 'string') {
+        pluginPath = plugin;
+        // eslint-disable-next-line global-require, import/no-dynamic-require
+        plugin = require(pluginPath);
+      }
+
+      const constructorName = plugin.__expression
+        ? `(${plugin.__expression})`
+        : plugin.name;
+
+      const config = init(plugin, args);
+
+      Object.defineProperties(config, {
+        __pluginName: { value: this.name },
+        __pluginArgs: { value: args },
+        __pluginConstructorName: { value: constructorName },
+        __pluginPath: { value: pluginPath },
+      });
+
+      return config;
+    }
+  }
+);
diff --git a/node_modules/webpack-chain/src/Resolve.js b/node_modules/webpack-chain/src/Resolve.js
new file mode 100644
index 00000000..48360714
--- /dev/null
+++ b/node_modules/webpack-chain/src/Resolve.js
@@ -0,0 +1,71 @@
+const ChainedMap = require('./ChainedMap');
+const ChainedSet = require('./ChainedSet');
+const Plugin = require('./Plugin');
+
+module.exports = class extends ChainedMap {
+  constructor(parent) {
+    super(parent);
+    this.alias = new ChainedMap(this);
+    this.aliasFields = new ChainedSet(this);
+    this.descriptionFiles = new ChainedSet(this);
+    this.extensions = new ChainedSet(this);
+    this.mainFields = new ChainedSet(this);
+    this.mainFiles = new ChainedSet(this);
+    this.modules = new ChainedSet(this);
+    this.plugins = new ChainedMap(this);
+    this.extend([
+      'cachePredicate',
+      'cacheWithContext',
+      'concord',
+      'enforceExtension',
+      'enforceModuleExtension',
+      'symlinks',
+      'unsafeCache',
+    ]);
+  }
+
+  plugin(name) {
+    return this.plugins.getOrCompute(name, () => new Plugin(this, name));
+  }
+
+  toConfig() {
+    return this.clean(
+      Object.assign(this.entries() || {}, {
+        alias: this.alias.entries(),
+        aliasFields: this.aliasFields.values(),
+        descriptionFiles: this.descriptionFiles.values(),
+        extensions: this.extensions.values(),
+        mainFields: this.mainFields.values(),
+        mainFiles: this.mainFiles.values(),
+        modules: this.modules.values(),
+        plugins: this.plugins.values().map(plugin => plugin.toConfig()),
+      })
+    );
+  }
+
+  merge(obj, omit = []) {
+    const omissions = [
+      'alias',
+      'aliasFields',
+      'descriptionFiles',
+      'extensions',
+      'mainFields',
+      'mainFiles',
+      'modules',
+    ];
+
+    if (!omit.includes('plugin') && 'plugin' in obj) {
+      Object.keys(obj.plugin).forEach(name =>
+        this.plugin(name).merge(obj.plugin[name])
+      );
+    }
+
+    omissions.forEach(key => {
+      if (!omit.includes(key) && key in obj) {
+        this[key].merge(obj[key]);
+      }
+    });
+
+    return super.merge(obj, [...omit, ...omissions, 'plugin']);
+  }
+};
diff --git a/node_modules/webpack-chain/src/ResolveLoader.js b/node_modules/webpack-chain/src/ResolveLoader.js
new file mode 100644
index 00000000..e1491a38
--- /dev/null
+++ b/node_modules/webpack-chain/src/ResolveLoader.js
@@ -0,0 +1,34 @@
+const Resolve = require('./Resolve');
+const ChainedSet = require('./ChainedSet');
+
+module.exports = class extends Resolve {
+  constructor(parent) {
+    super(parent);
+    this.moduleExtensions = new ChainedSet(this);
+    this.packageMains = new ChainedSet(this);
+  }
+
+  toConfig() {
+    return this.clean(
+      Object.assign(
+        {
+          moduleExtensions: this.moduleExtensions.values(),
+          packageMains: this.packageMains.values(),
+        },
+        super.toConfig()
+      )
+    );
+  }
+
+  merge(obj, omit = []) {
+    const omissions = ['moduleExtensions', 'packageMains'];
+
+    omissions.forEach(key => {
+      if (!omit.includes(key) && key in obj) {
+        this[key].merge(obj[key]);
+      }
+    });
+
+    return super.merge(obj, [...omit, ...omissions]);
+  }
+};
diff --git a/node_modules/webpack-chain/src/Rule.js b/node_modules/webpack-chain/src/Rule.js
new file mode 100644
index 00000000..45e16955
--- /dev/null
+++ b/node_modules/webpack-chain/src/Rule.js
@@ -0,0 +1,98 @@
+const ChainedMap = require('./ChainedMap');
+const ChainedSet = require('./ChainedSet');
+const Use = require('./Use');
+
+module.exports = class Rule extends ChainedMap {
+  constructor(parent, name) {
+    super(parent);
+    this.name = name;
+    this.names = [];
+
+    let rule = this;
+    while (rule instanceof Rule) {
+      this.names.unshift(rule.name);
+      rule = rule.parent;
+    }
+
+    this.uses = new ChainedMap(this);
+    this.include = new ChainedSet(this);
+    this.exclude = new ChainedSet(this);
+    this.oneOfs = new ChainedMap(this);
+    this.extend([
+      'enforce',
+      'issuer',
+      'parser',
+      'resource',
+      'resourceQuery',
+      'sideEffects',
+      'test',
+      'type',
+    ]);
+  }
+
+  use(name) {
+    return this.uses.getOrCompute(name, () => new Use(this, name));
+  }
+
+  oneOf(name) {
+    return this.oneOfs.getOrCompute(name, () => new Rule(this, name));
+  }
+
+  pre() {
+    return this.enforce('pre');
+  }
+
+  post() {
+    return this.enforce('post');
+  }
+
+  toConfig() {
+    const config = this.clean(
+      Object.assign(this.entries() || {}, {
+        include: this.include.values(),
+        exclude: this.exclude.values(),
+        oneOf: this.oneOfs.values().map(oneOf => oneOf.toConfig()),
+        use: this.uses.values().map(use => use.toConfig()),
+      })
+    );
+
+    Object.defineProperties(config, {
+      __ruleNames: { value: this.names },
+    });
+
+    return config;
+  }
+
+  merge(obj, omit = []) {
+    if (!omit.includes('include') && 'include' in obj) {
+      this.include.merge(obj.include);
+    }
+
+    if (!omit.includes('exclude') && 'exclude' in obj) {
+      this.exclude.merge(obj.exclude);
+    }
+
+    if (!omit.includes('use') && 'use' in obj) {
+      Object.keys(obj.use).forEach(name => this.use(name).merge(obj.use[name]));
+    }
+
+    if (!omit.includes('oneOf') && 'oneOf' in obj) {
+      Object.keys(obj.oneOf).forEach(name =>
+        this.oneOf(name).merge(obj.oneOf[name])
+      );
+    }
+
+    if (!omit.includes('test') && 'test' in obj) {
+      this.test(obj.test instanceof RegExp ? obj.test : new RegExp(obj.test));
+    }
+
+    return super.merge(obj, [
+      ...omit,
+      'include',
+      'exclude',
+      'use',
+      'oneOf',
+      'test',
+    ]);
+  }
+};
diff --git a/node_modules/webpack-chain/src/Use.js b/node_modules/webpack-chain/src/Use.js
new file mode 100644
index 00000000..8ab3078e
--- /dev/null
+++ b/node_modules/webpack-chain/src/Use.js
@@ -0,0 +1,41 @@
+const merge = require('deepmerge');
+const ChainedMap = require('./ChainedMap');
+const Orderable = require('./Orderable');
+
+module.exports = Orderable(
+  class extends ChainedMap {
+    constructor(parent, name) {
+      super(parent);
+      this.name = name;
+      this.extend(['loader', 'options']);
+    }
+
+    tap(f) {
+      this.options(f(this.get('options')));
+      return this;
+    }
+
+    merge(obj, omit = []) {
+      if (!omit.includes('loader') && 'loader' in obj) {
+        this.loader(obj.loader);
+      }
+
+      if (!omit.includes('options') && 'options' in obj) {
+        this.options(merge(this.store.get('options') || {}, obj.options));
+      }
+
+      return super.merge(obj, [...omit, 'loader', 'options']);
+    }
+
+    toConfig() {
+      const config = this.clean(this.entries() || {});
+
+      Object.defineProperties(config, {
+        __useName: { value: this.name },
+        __ruleNames: { value: this.parent && this.parent.names },
+      });
+
+      return config;
+    }
+  }
+);