WIP - add extractor, generate snippet_data

node_modules/webpack-dev-middleware/CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+## [3.7.0](https://github.com/webpack/webpack-dev-middleware/compare/v3.6.2...v3.7.0) (2019-05-15)
+
+
+### Features
+
+* support `HEAD` method by default ([#398](https://github.com/webpack/webpack-dev-middleware/issues/398)) ([ec3d5eb](https://github.com/webpack/webpack-dev-middleware/commit/ec3d5eb))
+
+
+
+<a name="3.6.2"></a>
+## [3.6.2](https://github.com/webpack/webpack-dev-middleware/compare/v3.6.1...v3.6.2) (2019-04-03)
+
+
+### Bug Fixes
+
+* check existence of `res.getHeader` and set the correct Content-Type ([#385](https://github.com/webpack/webpack-dev-middleware/issues/385)) ([56dc705](https://github.com/webpack/webpack-dev-middleware/commit/56dc705))
+
+
+
+## [3.6.1](https://github.com/webpack/webpack-dev-middleware/compare/v3.6.0...v3.6.1) (2019-03-06)
+
+
+### Bug Fixes
+
+* do not overwrite Content-Type if header already exists ([#377](https://github.com/webpack/webpack-dev-middleware/issues/377)) ([b2a6fed](https://github.com/webpack/webpack-dev-middleware/commit/b2a6fed))
+
+
+
+<a name="3.5.2"></a>
+## [3.5.2](https://github.com/webpack/webpack-dev-middleware/compare/v3.5.1...v3.5.2) (2019-02-06)
+
+
+### Bug Fixes
+
+* don't add charset to `usdz` file type ([#357](https://github.com/webpack/webpack-dev-middleware/issues/357)) ([b135b3d](https://github.com/webpack/webpack-dev-middleware/commit/b135b3d))
+
+
+
+<a name="3.5.1"></a>
+## [3.5.1](https://github.com/webpack/webpack-dev-middleware/compare/v3.5.0...v3.5.1) (2019-01-17)
+
+
+### Bug Fixes
+
+* remove querystring from filenames when writing to disk ([#361](https://github.com/webpack/webpack-dev-middleware/issues/361)) ([90d0d94](https://github.com/webpack/webpack-dev-middleware/commit/90d0d94))
+
+
+
+<a name="3.5.0"></a>
+# [3.5.0](https://github.com/webpack/webpack-dev-middleware/compare/v3.4.0...v3.5.0) (2019-01-04)
+
+
+### Bug Fixes
+
+* **middleware:** do not add 'null' to Content-Type ([#355](https://github.com/webpack/webpack-dev-middleware/issues/355)) ([cf4d7a9](https://github.com/webpack/webpack-dev-middleware/commit/cf4d7a9))
+
+
+### Features
+
+* allow to redefine `mimeTypes` (possible to use `force` option) ([#349](https://github.com/webpack/webpack-dev-middleware/issues/349)) ([e56a181](https://github.com/webpack/webpack-dev-middleware/commit/e56a181))
+
+
+
+<a name="3.3.0"></a>
+# [3.3.0](https://github.com/webpack/webpack-dev-middleware/compare/v3.2.0...v3.3.0) (2018-09-10)
+
+
+### Features
+
+* **middleware:** expose the memory filesystem (`response.locals.fs`) ([#337](https://github.com/webpack/webpack-dev-middleware/issues/337)) ([f9a138e](https://github.com/webpack/webpack-dev-middleware/commit/f9a138e))
+
+
+
+<a name="3.2.0"></a>
+# [3.2.0](https://github.com/webpack/webpack-dev-middleware/compare/v3.1.3...v3.2.0) (2018-08-23)
+
+
+### Bug Fixes
+
+* **package:** 18 security vulnerabilities ([#329](https://github.com/webpack/webpack-dev-middleware/issues/329)) ([5951de9](https://github.com/webpack/webpack-dev-middleware/commit/5951de9))
+
+
+### Features
+
+* **middleware:** add `methods` option (`options.methods`) ([#319](https://github.com/webpack/webpack-dev-middleware/issues/319)) ([fe6bb86](https://github.com/webpack/webpack-dev-middleware/commit/fe6bb86))

node_modules/webpack-dev-middleware/LICENSE

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+Copyright JS Foundation and other contributors
+
+Permission is hereby granted, free of charge, to any person obtaining
+a copy of this software and associated documentation files (the
+'Software'), to deal in the Software without restriction, including
+without limitation the rights to use, copy, modify, merge, publish,
+distribute, sublicense, and/or sell copies of the Software, and to
+permit persons to whom the Software is furnished to do so, subject to
+the following conditions:
+
+The above copyright notice and this permission notice shall be
+included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

node_modules/webpack-dev-middleware/README.md

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+<div align="center">
+  <a href="https://github.com/webpack/webpack">
+    <img width="200" height="200" src="https://webpack.js.org/assets/icon-square-big.svg">
+  </a>
+</div>
+
+[![npm][npm]][npm-url]
+[![node][node]][node-url]
+[![deps][deps]][deps-url]
+[![tests][tests]][tests-url]
+[![coverage][cover]][cover-url]
+[![chat][chat]][chat-url]
+[![size][size]][size-url]
+
+# webpack-dev-middleware
+
+An express-style development middleware for use with [webpack](https://webpack.js.org)
+bundles and allows for serving of the files emitted from webpack.
+This should be used for **development only**.
+
+Some of the benefits of using this middleware include:
+
+- No files are written to disk, rather it handles files in memory
+- If files changed in watch mode, the middleware delays requests until compiling
+  has completed.
+- Supports hot module reload (HMR).
+
+## Requirements
+
+This module requires a minimum of Node v6.9.0 and Webpack v4.0.0, and must be used with a
+server that accepts express-style middleware.
+
+## Getting Started
+
+First thing's first, install the module:
+
+```console
+npm install webpack-dev-middleware --save-dev
+```
+
+_Note: We do not recommend installing this module globally._
+
+## Usage
+
+```js
+const webpack = require('webpack');
+const middleware = require('webpack-dev-middleware');
+const compiler = webpack({
+  // webpack options
+});
+const express = require('express');
+const app = express();
+
+app.use(
+  middleware(compiler, {
+    // webpack-dev-middleware options
+  })
+);
+
+app.listen(3000, () => console.log('Example app listening on port 3000!'));
+```
+
+## Options
+
+The middleware accepts an `options` Object. The following is a property reference
+for the Object.
+
+_Note: The `publicPath` property is required, whereas all other options are optional_
+
+### methods
+
+Type: `Array`  
+Default: `[ 'GET', 'HEAD' ]`
+
+This property allows a user to pass the list of HTTP request methods accepted by the server.
+
+### headers
+
+Type: `Object`  
+Default: `undefined`
+
+This property allows a user to pass custom HTTP headers on each request. eg.
+`{ "X-Custom-Header": "yes" }`
+
+### index
+
+Type: `String`  
+Default: `undefined`
+
+"index.html",
+// The index path for web server, defaults to "index.html".
+// If falsy (but not undefined), the server will not respond to requests to the root URL.
+
+### lazy
+
+Type: `Boolean`  
+Default: `undefined`
+
+This option instructs the module to operate in 'lazy' mode, meaning that it won't
+recompile when files change, but rather on each request.
+
+### logger
+
+Type: `Object`  
+Default: [`webpack-log`](https://github.com/webpack-contrib/webpack-log/blob/master/index.js)
+
+In the rare event that a user would like to provide a custom logging interface,
+this property allows the user to assign one. The module leverages
+[`webpack-log`](https://github.com/webpack-contrib/webpack-log#readme)
+for creating the [`loglevelnext`](https://github.com/shellscape/loglevelnext#readme)
+logging management by default. Any custom logger must adhere to the same
+exports for compatibility. Specifically, all custom loggers must have the
+following exported methods at a minimum:
+
+- `log.trace`
+- `log.debug`
+- `log.info`
+- `log.warn`
+- `log.error`
+
+Please see the documentation for `loglevel` for more information.
+
+### logLevel
+
+Type: `String`  
+Default: `'info'`
+
+This property defines the level of messages that the module will log. Valid levels
+include:
+
+- `trace`
+- `debug`
+- `info`
+- `warn`
+- `error`
+- `silent`
+
+Setting a log level means that all other levels below it will be visible in the
+console. Setting `logLevel: 'silent'` will hide all console output. The module
+leverages [`webpack-log`](https://github.com/webpack-contrib/webpack-log#readme)
+for logging management, and more information can be found on its page.
+
+### logTime
+
+Type: `Boolean`  
+Default: `false`
+
+If `true` the log output of the module will be prefixed by a timestamp in the
+`HH:mm:ss` format.
+
+### mimeTypes
+
+Type: `Object`  
+Default: `null`
+
+This property allows a user to register custom mime types or extension mappings.
+eg. `mimeTypes: { 'text/html': [ 'phtml' ] }`.
+
+By default node-mime will throw an error if you try to map a type to an extension
+that is already assigned to another type. Passing `force: true` will suppress this behavior
+(overriding any previous mapping).
+eg. `mimeTypes: { typeMap: { 'text/html': [ 'phtml' ] } }, force: true }`.
+
+Please see the documentation for
+[`node-mime`](https://github.com/broofa/node-mime#mimedefinetypemap-force--false) for more information.
+
+### publicPath
+
+Type: `String`  
+_Required_
+
+The public path that the middleware is bound to. _Best Practice: use the same
+`publicPath` defined in your webpack config. For more information about
+`publicPath`, please see
+[the webpack documentation](https://webpack.js.org/guides/public-path)._
+
+### reporter
+
+Type: `Object`  
+Default: `undefined`
+
+Allows users to provide a custom reporter to handle logging within the module.
+Please see the [default reporter](/lib/reporter.js)
+for an example.
+
+### serverSideRender
+
+Type: `Boolean`  
+Default: `undefined`
+
+Instructs the module to enable or disable the server-side rendering mode. Please
+see [Server-Side Rendering](#server-side-rendering) for more information.
+
+### stats
+
+Type: `Object`  
+Default: `{ context: process.cwd() }`
+
+Options for formatting statistics displayed during and after compile. For more
+information and property details, please see the
+[webpack documentation](https://webpack.js.org/configuration/stats/#stats).
+
+### watchOptions
+
+Type: `Object`  
+Default: `{ aggregateTimeout: 200 }`
+
+The module accepts an `Object` containing options for file watching, which is
+passed directly to the compiler provided. For more information on watch options
+please see the [webpack documentation](https://webpack.js.org/configuration/watch/#watchoptions)
+
+### writeToDisk
+
+Type: `Boolean|Function`  
+Default: `false`
+
+If `true`, the option will instruct the module to write files to the configured
+location on disk as specified in your `webpack` config file. _Setting
+`writeToDisk: true` won't change the behavior of the `webpack-dev-middleware`,
+and bundle files accessed through the browser will still be served from memory._
+This option provides the same capabilities as the
+[`WriteFilePlugin`](https://github.com/gajus/write-file-webpack-plugin/pulls).
+
+This option also accepts a `Function` value, which can be used to filter which
+files are written to disk. The function follows the same premise as
+[`Array#filter`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/filter)
+in which a return value of `false` _will not_ write the file, and a return value
+of `true` _will_ write the file to disk. eg.
+
+```js
+{
+  writeToDisk: (filePath) => {
+    return /superman\.css$/.test(filePath);
+  };
+}
+```
+
+### fs
+
+Type: `Object`  
+Default: `MemoryFileSystem`
+
+Set the default file system which will be used by webpack as primary destination of generated files. Default is set to webpack's default file system: [memory-fs](https://github.com/webpack/memory-fs). This option isn't affected by the [writeToDisk](#writeToDisk) option.
+
+**Note:** As of 3.5.x version of the middleware you have to provide `.join()` method to the `fs` instance manually. This can be done simply by using `path.join`:
+
+```js
+fs.join = path.join; // no need to bind
+```
+
+## API
+
+`webpack-dev-middleware` also provides convenience methods that can be use to
+interact with the middleware at runtime:
+
+### `close(callback)`
+
+Instructs a webpack-dev-middleware instance to stop watching for file changes.
+
+### Parameters
+
+#### callback
+
+Type: `Function`
+
+A function executed once the middleware has stopped watching.
+
+### `invalidate()`
+
+Instructs a webpack-dev-middleware instance to recompile the bundle.
+e.g. after a change to the configuration.
+
+```js
+const webpack = require('webpack');
+const compiler = webpack({ ... });
+const middleware = require('webpack-dev-middleware');
+const instance = middleware(compiler);
+
+app.use(instance);
+
+setTimeout(() => {
+  // After a short delay the configuration is changed and a banner plugin is added
+  // to the config
+  compiler.apply(new webpack.BannerPlugin('A new banner'));
+
+  // Recompile the bundle with the banner plugin:
+  instance.invalidate();
+}, 1000);
+```
+
+### `waitUntilValid(callback)`
+
+Executes a callback function when the compiler bundle is valid, typically after
+compilation.
+
+### Parameters
+
+#### callback
+
+Type: `Function`
+
+A function executed when the bundle becomes valid. If the bundle is
+valid at the time of calling, the callback is executed immediately.
+
+```js
+const webpack = require('webpack');
+const compiler = webpack({ ... });
+const middleware = require('webpack-dev-middleware');
+const instance = middleware(compiler);
+
+app.use(instance);
+
+instance.waitUntilValid(() => {
+  console.log('Package is in a valid state');
+});
+```
+
+## Known Issues
+
+### Multiple Successive Builds
+
+Watching (by means of `lazy: false`) will frequently cause multiple compilations
+as the bundle changes during compilation. This is due in part to cross-platform
+differences in file watchers, so that webpack doesn't loose file changes when
+watched files change rapidly. If you run into this situation, please make use of
+the [`TimeFixPlugin`](https://github.com/egoist/time-fix-plugin).
+
+## Server-Side Rendering
+
+_Note: this feature is experimental and may be removed or changed completely in the future._
+
+In order to develop an app using server-side rendering, we need access to the
+[`stats`](https://github.com/webpack/docs/wiki/node.js-api#stats), which is
+generated with each build.
+
+With server-side rendering enabled, `webpack-dev-middleware` sets the `stat` to
+`res.locals.webpackStats` and the memory filesystem to `res.locals.fs` before invoking the next middleware, allowing a
+developer to render the page body and manage the response to clients.
+
+_Note: Requests for bundle files will still be handled by
+`webpack-dev-middleware` and all requests will be pending until the build
+process is finished with server-side rendering enabled._
+
+Example Implementation:
+
+```js
+const webpack = require('webpack');
+const compiler = webpack({
+  // webpack options
+});
+const isObject = require('is-object');
+const middleware = require('webpack-dev-middleware');
+
+// This function makes server rendering of asset references consistent with different webpack chunk/entry configurations
+function normalizeAssets(assets) {
+  if (isObject(assets)) {
+    return Object.values(assets);
+  }
+
+  return Array.isArray(assets) ? assets : [assets];
+}
+
+app.use(middleware(compiler, { serverSideRender: true }));
+
+// The following middleware would not be invoked until the latest build is finished.
+app.use((req, res) => {
+  const assetsByChunkName = res.locals.webpackStats.toJson().assetsByChunkName;
+  const fs = res.locals.fs;
+  const outputPath = res.locals.webpackStats.toJson().outputPath;
+
+  // then use `assetsByChunkName` for server-sider rendering
+  // For example, if you have only one main chunk:
+  res.send(`
+<html>
+  <head>
+    <title>My App</title>
+    <style>
+    ${normalizeAssets(assetsByChunkName.main)
+      .filter((path) => path.endsWith('.css'))
+      .map((path) => fs.readFileSync(outputPath + '/' + path))
+      .join('\n')}
+    </style>
+  </head>
+  <body>
+    <div id="root"></div>
+    ${normalizeAssets(assetsByChunkName.main)
+      .filter((path) => path.endsWith('.js'))
+      .map((path) => `<script src="${path}"></script>`)
+      .join('\n')}
+  </body>
+</html>
+  `);
+});
+```
+
+## Support
+
+We do our best to keep Issues in the repository focused on bugs, features, and
+needed modifications to the code for the module. Because of that, we ask users
+with general support, "how-to", or "why isn't this working" questions to try one
+of the other support channels that are available.
+
+Your first-stop-shop for support for webpack-dev-server should by the excellent
+[documentation][docs-url] for the module. If you see an opportunity for improvement
+of those docs, please head over to the [webpack.js.org repo][wjo-url] and open a
+pull request.
+
+From there, we encourage users to visit the [webpack Gitter chat][chat-url] and
+talk to the fine folks there. If your quest for answers comes up dry in chat,
+head over to [StackOverflow][stack-url] and do a quick search or open a new
+question. Remember; It's always much easier to answer questions that include your
+`webpack.config.js` and relevant files!
+
+If you're twitter-savvy you can tweet [#webpack][hash-url] with your question
+and someone should be able to reach out and lend a hand.
+
+If you have discovered a :bug:, have a feature suggestion, of would like to see
+a modification, please feel free to create an issue on Github. _Note: The issue
+template isn't optional, so please be sure not to remove it, and please fill it
+out completely._
+
+## Contributing
+
+Please take a moment to read our contributing guidelines if you haven't yet done so.
+
+[CONTRIBUTING](./.github/CONTRIBUTING.md)
+
+## License
+
+[MIT](./LICENSE)
+
+[npm]: https://img.shields.io/npm/v/webpack-dev-middleware.svg
+[npm-url]: https://npmjs.com/package/webpack-dev-middleware
+[node]: https://img.shields.io/node/v/webpack-dev-middleware.svg
+[node-url]: https://nodejs.org
+[deps]: https://david-dm.org/webpack/webpack-dev-middleware.svg
+[deps-url]: https://david-dm.org/webpack/webpack-dev-middleware
+[tests]: https://dev.azure.com/webpack/webpack-dev-middleware/_apis/build/status/webpack.webpack-dev-middleware?branchName=master
+[tests-url]: https://dev.azure.com/webpack/webpack-dev-middleware/_build/latest?definitionId=8&branchName=master
+[cover]: https://codecov.io/gh/webpack/webpack-dev-middleware/branch/master/graph/badge.svg
+[cover-url]: https://codecov.io/gh/webpack/webpack-dev-middleware
+[chat]: https://badges.gitter.im/webpack/webpack.svg
+[chat-url]: https://gitter.im/webpack/webpack
+[size]: https://packagephobia.now.sh/badge?p=webpack-dev-middleware
+[size-url]: https://packagephobia.now.sh/result?p=webpack-dev-middleware
+[docs-url]: https://webpack.js.org/guides/development/#using-webpack-dev-middleware
+[hash-url]: https://twitter.com/search?q=webpack
+[middleware-url]: https://github.com/webpack/webpack-dev-middleware
+[stack-url]: https://stackoverflow.com/questions/tagged/webpack-dev-middleware
+[uglify-url]: https://github.com/webpack-contrib/uglifyjs-webpack-plugin
+[wjo-url]: https://github.com/webpack/webpack.js.org

node_modules/webpack-dev-middleware/index.js

@@ -0,0 +1,110 @@
+'use strict';
+
+const mime = require('mime');
+
+const createContext = require('./lib/context');
+const middleware = require('./lib/middleware');
+const reporter = require('./lib/reporter');
+const { setFs, toDisk } = require('./lib/fs');
+const { getFilenameFromUrl, noop, ready } = require('./lib/util');
+
+const defaults = {
+  logLevel: 'info',
+  logTime: false,
+  logger: null,
+  mimeTypes: null,
+  reporter,
+  stats: {
+    colors: true,
+    context: process.cwd(),
+  },
+  watchOptions: {
+    aggregateTimeout: 200,
+  },
+  writeToDisk: false,
+};
+
+module.exports = function wdm(compiler, opts) {
+  const options = Object.assign({}, defaults, opts);
+
+  if (options.lazy) {
+    if (typeof options.filename === 'string') {
+      const filename = options.filename
+        .replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, '\\$&') // eslint-disable-line no-useless-escape
+        .replace(/\\\[[a-z]+\\\]/gi, '.+');
+
+      options.filename = new RegExp(`^[/]{0,1}${filename}$`);
+    }
+  }
+
+  // defining custom MIME type
+  if (options.mimeTypes) {
+    const typeMap = options.mimeTypes.typeMap || options.mimeTypes;
+    const force = !!options.mimeTypes.force;
+    mime.define(typeMap, force);
+  }
+
+  const context = createContext(compiler, options);
+
+  // start watching
+  if (!options.lazy) {
+    context.watching = compiler.watch(options.watchOptions, (err) => {
+      if (err) {
+        context.log.error(err.stack || err);
+        if (err.details) {
+          context.log.error(err.details);
+        }
+      }
+    });
+  } else {
+    context.state = true;
+  }
+
+  if (options.writeToDisk) {
+    toDisk(context);
+  }
+
+  setFs(context, compiler);
+
+  return Object.assign(middleware(context), {
+    close(callback) {
+      // eslint-disable-next-line no-param-reassign
+      callback = callback || noop;
+
+      if (context.watching) {
+        context.watching.close(callback);
+      } else {
+        callback();
+      }
+    },
+
+    context,
+
+    fileSystem: context.fs,
+
+    getFilenameFromUrl: getFilenameFromUrl.bind(
+      this,
+      context.options.publicPath,
+      context.compiler
+    ),
+
+    invalidate(callback) {
+      // eslint-disable-next-line no-param-reassign
+      callback = callback || noop;
+
+      if (context.watching) {
+        ready(context, callback, {});
+        context.watching.invalidate();
+      } else {
+        callback();
+      }
+    },
+
+    waitUntilValid(callback) {
+      // eslint-disable-next-line no-param-reassign
+      callback = callback || noop;
+
+      ready(context, callback, {});
+    },
+  });
+};

node_modules/webpack-dev-middleware/lib/DevMiddlewareError.js

@@ -0,0 +1,3 @@
+'use strict';
+
+module.exports = class DevMiddlewareError extends Error {};

node_modules/webpack-dev-middleware/lib/context.js

@@ -0,0 +1,106 @@
+'use strict';
+
+const weblog = require('webpack-log');
+
+module.exports = function ctx(compiler, options) {
+  const context = {
+    state: false,
+    webpackStats: null,
+    callbacks: [],
+    options,
+    compiler,
+    watching: null,
+    forceRebuild: false,
+  };
+
+  if (options.logger) {
+    context.log = options.logger;
+  } else {
+    context.log = weblog({
+      level: options.logLevel || 'info',
+      name: 'wdm',
+      timestamp: options.logTime,
+    });
+  }
+
+  const { log } = context;
+
+  function done(stats) {
+    // We are now on valid state
+    context.state = true;
+    context.webpackStats = stats;
+
+    // Do the stuff in nextTick, because bundle may be invalidated
+    // if a change happened while compiling
+    process.nextTick(() => {
+      // check if still in valid state
+      if (!context.state) {
+        return;
+      }
+
+      // print webpack output
+      context.options.reporter(context.options, {
+        log,
+        state: true,
+        stats,
+      });
+
+      // execute callback that are delayed
+      const cbs = context.callbacks;
+      context.callbacks = [];
+      cbs.forEach((cb) => {
+        cb(stats);
+      });
+    });
+
+    // In lazy mode, we may issue another rebuild
+    if (context.forceRebuild) {
+      context.forceRebuild = false;
+      rebuild();
+    }
+  }
+
+  function invalid(callback) {
+    if (context.state) {
+      context.options.reporter(context.options, {
+        log,
+        state: false,
+      });
+    }
+
+    // We are now in invalid state
+    context.state = false;
+    if (typeof callback === 'function') {
+      callback();
+    }
+  }
+
+  function rebuild() {
+    if (context.state) {
+      context.state = false;
+      context.compiler.run((err) => {
+        if (err) {
+          log.error(err.stack || err);
+          if (err.details) {
+            log.error(err.details);
+          }
+        }
+      });
+    } else {
+      context.forceRebuild = true;
+    }
+  }
+
+  context.rebuild = rebuild;
+  context.compiler.hooks.invalid.tap('WebpackDevMiddleware', invalid);
+  context.compiler.hooks.run.tap('WebpackDevMiddleware', invalid);
+  context.compiler.hooks.done.tap('WebpackDevMiddleware', done);
+  context.compiler.hooks.watchRun.tap(
+    'WebpackDevMiddleware',
+    (comp, callback) => {
+      invalid(callback);
+    }
+  );
+
+  return context;
+};

node_modules/webpack-dev-middleware/lib/fs.js

@@ -0,0 +1,124 @@
+'use strict';
+
+const fs = require('fs');
+const path = require('path');
+
+const MemoryFileSystem = require('memory-fs');
+const { colors } = require('webpack-log');
+const NodeOutputFileSystem = require('webpack/lib/node/NodeOutputFileSystem');
+
+const DevMiddlewareError = require('./DevMiddlewareError');
+
+const { mkdirp } = new NodeOutputFileSystem();
+
+module.exports = {
+  toDisk(context) {
+    const compilers = context.compiler.compilers || [context.compiler];
+    for (const compiler of compilers) {
+      compiler.hooks.afterEmit.tap('WebpackDevMiddleware', (compilation) => {
+        const { assets } = compilation;
+        const { log } = context;
+        const { writeToDisk: filter } = context.options;
+        let { outputPath } = compiler;
+
+        if (outputPath === '/') {
+          outputPath = compiler.context;
+        }
+
+        for (const assetPath of Object.keys(assets)) {
+          let targetFile = assetPath;
+
+          const queryStringIdx = targetFile.indexOf('?');
+
+          if (queryStringIdx >= 0) {
+            targetFile = targetFile.substr(0, queryStringIdx);
+          }
+
+          const targetPath = path.isAbsolute(targetFile)
+            ? targetFile
+            : path.join(outputPath, targetFile);
+          const allowWrite =
+            filter && typeof filter === 'function' ? filter(targetPath) : true;
+
+          if (allowWrite) {
+            const asset = assets[assetPath];
+            let content = asset.source();
+
+            if (!Buffer.isBuffer(content)) {
+              // TODO need remove in next major release
+              if (Array.isArray(content)) {
+                content = content.join('\n');
+              }
+
+              content = Buffer.from(content, 'utf8');
+            }
+
+            mkdirp.sync(path.dirname(targetPath));
+
+            try {
+              fs.writeFileSync(targetPath, content, 'utf-8');
+
+              log.debug(
+                colors.cyan(
+                  `Asset written to disk: ${path.relative(
+                    process.cwd(),
+                    targetPath
+                  )}`
+                )
+              );
+            } catch (e) {
+              log.error(`Unable to write asset to disk:\n${e}`);
+            }
+          }
+        }
+      });
+    }
+  },
+
+  setFs(context, compiler) {
+    if (
+      typeof compiler.outputPath === 'string' &&
+      !path.posix.isAbsolute(compiler.outputPath) &&
+      !path.win32.isAbsolute(compiler.outputPath)
+    ) {
+      throw new DevMiddlewareError(
+        '`output.path` needs to be an absolute path or `/`.'
+      );
+    }
+
+    let fileSystem;
+
+    // store our files in memory
+    const isConfiguredFs = context.options.fs;
+    const isMemoryFs =
+      !isConfiguredFs &&
+      !compiler.compilers &&
+      compiler.outputFileSystem instanceof MemoryFileSystem;
+
+    if (isConfiguredFs) {
+      // eslint-disable-next-line no-shadow
+      const { fs } = context.options;
+
+      if (typeof fs.join !== 'function') {
+        // very shallow check
+        throw new Error(
+          'Invalid options: options.fs.join() method is expected'
+        );
+      }
+
+      // eslint-disable-next-line no-param-reassign
+      compiler.outputFileSystem = fs;
+      fileSystem = fs;
+    } else if (isMemoryFs) {
+      fileSystem = compiler.outputFileSystem;
+    } else {
+      fileSystem = new MemoryFileSystem();
+
+      // eslint-disable-next-line no-param-reassign
+      compiler.outputFileSystem = fileSystem;
+    }
+
+    // eslint-disable-next-line no-param-reassign
+    context.fs = fileSystem;
+  },
+};

node_modules/webpack-dev-middleware/lib/middleware.js

@@ -0,0 +1,136 @@
+'use strict';
+
+const path = require('path');
+
+const mime = require('mime');
+
+const DevMiddlewareError = require('./DevMiddlewareError');
+const {
+  getFilenameFromUrl,
+  handleRangeHeaders,
+  handleRequest,
+  ready,
+} = require('./util');
+
+// Do not add a charset to the Content-Type header of these file types
+// otherwise the client will fail to render them correctly.
+const NonCharsetFileTypes = /\.(wasm|usdz)$/;
+
+module.exports = function wrapper(context) {
+  return function middleware(req, res, next) {
+    // fixes #282. credit @cexoso. in certain edge situations res.locals is
+    // undefined.
+    // eslint-disable-next-line no-param-reassign
+    res.locals = res.locals || {};
+
+    function goNext() {
+      if (!context.options.serverSideRender) {
+        return next();
+      }
+
+      return new Promise((resolve) => {
+        ready(
+          context,
+          () => {
+            // eslint-disable-next-line no-param-reassign
+            res.locals.webpackStats = context.webpackStats;
+            // eslint-disable-next-line no-param-reassign
+            res.locals.fs = context.fs;
+
+            resolve(next());
+          },
+          req
+        );
+      });
+    }
+
+    const acceptedMethods = context.options.methods || ['GET', 'HEAD'];
+
+    if (acceptedMethods.indexOf(req.method) === -1) {
+      return goNext();
+    }
+
+    let filename = getFilenameFromUrl(
+      context.options.publicPath,
+      context.compiler,
+      req.url
+    );
+
+    if (filename === false) {
+      return goNext();
+    }
+
+    return new Promise((resolve) => {
+      handleRequest(context, filename, processRequest, req);
+      // eslint-disable-next-line consistent-return
+      function processRequest() {
+        try {
+          let stat = context.fs.statSync(filename);
+
+          if (!stat.isFile()) {
+            if (stat.isDirectory()) {
+              let { index } = context.options;
+
+              // eslint-disable-next-line no-undefined
+              if (index === undefined || index === true) {
+                index = 'index.html';
+              } else if (!index) {
+                throw new DevMiddlewareError('next');
+              }
+
+              filename = path.posix.join(filename, index);
+              stat = context.fs.statSync(filename);
+
+              if (!stat.isFile()) {
+                throw new DevMiddlewareError('next');
+              }
+            } else {
+              throw new DevMiddlewareError('next');
+            }
+          }
+        } catch (e) {
+          return resolve(goNext());
+        }
+
+        // server content
+        let content = context.fs.readFileSync(filename);
+
+        content = handleRangeHeaders(content, req, res);
+
+        let contentType = mime.getType(filename) || '';
+
+        if (!NonCharsetFileTypes.test(filename)) {
+          contentType += '; charset=UTF-8';
+        }
+
+        if (!res.getHeader || !res.getHeader('Content-Type')) {
+          res.setHeader('Content-Type', contentType);
+        }
+
+        res.setHeader('Content-Length', content.length);
+
+        const { headers } = context.options;
+
+        if (headers) {
+          for (const name in headers) {
+            if ({}.hasOwnProperty.call(headers, name)) {
+              res.setHeader(name, context.options.headers[name]);
+            }
+          }
+        }
+
+        // Express automatically sets the statusCode to 200, but not all servers do (Koa).
+        // eslint-disable-next-line no-param-reassign
+        res.statusCode = res.statusCode || 200;
+
+        if (res.send) {
+          res.send(content);
+        } else {
+          res.end(content);
+        }
+
+        resolve();
+      }
+    });
+  };
+};

node_modules/webpack-dev-middleware/lib/reporter.js

@@ -0,0 +1,30 @@
+'use strict';
+
+module.exports = function reporter(middlewareOptions, options) {
+  const { log, state, stats } = options;
+
+  if (state) {
+    const displayStats = middlewareOptions.stats !== false;
+
+    if (displayStats) {
+      if (stats.hasErrors()) {
+        log.error(stats.toString(middlewareOptions.stats));
+      } else if (stats.hasWarnings()) {
+        log.warn(stats.toString(middlewareOptions.stats));
+      } else {
+        log.info(stats.toString(middlewareOptions.stats));
+      }
+    }
+
+    let message = 'Compiled successfully.';
+
+    if (stats.hasErrors()) {
+      message = 'Failed to compile.';
+    } else if (stats.hasWarnings()) {
+      message = 'Compiled with warnings.';
+    }
+    log.info(message);
+  } else {
+    log.info('Compiling...');
+  }
+};

node_modules/webpack-dev-middleware/lib/util.js

@@ -0,0 +1,191 @@
+'use strict';
+
+const path = require('path');
+const { parse } = require('url');
+const querystring = require('querystring');
+
+const parseRange = require('range-parser');
+
+const HASH_REGEXP = /[0-9a-f]{10,}/;
+
+// support for multi-compiler configuration
+// see: https://github.com/webpack/webpack-dev-server/issues/641
+function getPaths(publicPath, compiler, url) {
+  const compilers = compiler && compiler.compilers;
+  if (Array.isArray(compilers)) {
+    let compilerPublicPath;
+
+    // the path portion of compilerPublicPath
+    let compilerPublicPathBase;
+
+    for (let i = 0; i < compilers.length; i++) {
+      compilerPublicPath =
+        compilers[i].options &&
+        compilers[i].options.output &&
+        compilers[i].options.output.publicPath;
+
+      if (compilerPublicPath) {
+        if (compilerPublicPath.indexOf('/') === 0) {
+          compilerPublicPathBase = compilerPublicPath;
+        } else {
+          // handle the case where compilerPublicPath is a URL with hostname
+          compilerPublicPathBase = parse(compilerPublicPath).pathname;
+        }
+
+        // check the url vs the path part of the compilerPublicPath
+        if (url.indexOf(compilerPublicPathBase) === 0) {
+          return {
+            publicPath: compilerPublicPath,
+            outputPath: compilers[i].outputPath,
+          };
+        }
+      }
+    }
+  }
+  return {
+    publicPath,
+    outputPath: compiler.outputPath,
+  };
+}
+
+// eslint-disable-next-line consistent-return
+function ready(context, fn, req) {
+  if (context.state) {
+    return fn(context.webpackStats);
+  }
+
+  context.log.info(`wait until bundle finished: ${req.url || fn.name}`);
+  context.callbacks.push(fn);
+}
+
+module.exports = {
+  getFilenameFromUrl(pubPath, compiler, url) {
+    const { outputPath, publicPath } = getPaths(pubPath, compiler, url);
+    // localPrefix is the folder our bundle should be in
+    const localPrefix = parse(publicPath || '/', false, true);
+    const urlObject = parse(url);
+    let filename;
+
+    // publicPath has the hostname that is not the same as request url's, should fail
+    if (
+      localPrefix.hostname !== null &&
+      urlObject.hostname !== null &&
+      localPrefix.hostname !== urlObject.hostname
+    ) {
+      return false;
+    }
+
+    // publicPath is not in url, so it should fail
+    if (
+      publicPath &&
+      localPrefix.hostname === urlObject.hostname &&
+      url.indexOf(publicPath) !== 0
+    ) {
+      return false;
+    }
+
+    // strip localPrefix from the start of url
+    if (urlObject.pathname.indexOf(localPrefix.pathname) === 0) {
+      filename = urlObject.pathname.substr(localPrefix.pathname.length);
+    }
+
+    if (
+      !urlObject.hostname &&
+      localPrefix.hostname &&
+      url.indexOf(localPrefix.path) !== 0
+    ) {
+      return false;
+    }
+
+    let uri = outputPath;
+
+    /* istanbul ignore if */
+    if (process.platform === 'win32') {
+      // Path Handling for Microsoft Windows
+      if (filename) {
+        uri = path.posix.join(outputPath || '', querystring.unescape(filename));
+
+        if (!path.win32.isAbsolute(uri)) {
+          uri = `/${uri}`;
+        }
+      }
+
+      return uri;
+    }
+
+    // Path Handling for all other operating systems
+    if (filename) {
+      uri = path.posix.join(outputPath || '', filename);
+
+      if (!path.posix.isAbsolute(uri)) {
+        uri = `/${uri}`;
+      }
+    }
+
+    // if no matches, use outputPath as filename
+    return querystring.unescape(uri);
+  },
+
+  handleRangeHeaders(content, req, res) {
+    // assumes express API. For other servers, need to add logic to access
+    // alternative header APIs
+    res.setHeader('Accept-Ranges', 'bytes');
+
+    if (req.headers.range) {
+      const ranges = parseRange(content.length, req.headers.range);
+
+      // unsatisfiable
+      if (ranges === -1) {
+        res.setHeader('Content-Range', `bytes */${content.length}`);
+        // eslint-disable-next-line no-param-reassign
+        res.statusCode = 416;
+      }
+
+      // valid (syntactically invalid/multiple ranges are treated as a
+      // regular response)
+      if (ranges !== -2 && ranges.length === 1) {
+        const { length } = content;
+
+        // Content-Range
+        // eslint-disable-next-line no-param-reassign
+        res.statusCode = 206;
+        res.setHeader(
+          'Content-Range',
+          `bytes ${ranges[0].start}-${ranges[0].end}/${length}`
+        );
+
+        // eslint-disable-next-line no-param-reassign
+        content = content.slice(ranges[0].start, ranges[0].end + 1);
+      }
+    }
+
+    return content;
+  },
+
+  handleRequest(context, filename, processRequest, req) {
+    // in lazy mode, rebuild on bundle request
+    if (
+      context.options.lazy &&
+      (!context.options.filename || context.options.filename.test(filename))
+    ) {
+      context.rebuild();
+    }
+
+    if (HASH_REGEXP.test(filename)) {
+      try {
+        if (context.fs.statSync(filename).isFile()) {
+          processRequest();
+          return;
+        }
+      } catch (e) {
+        // eslint-disable-line
+      }
+    }
+
+    ready(context, processRequest, req);
+  },
+
+  noop: () => {},
+
+  ready,
+};

node_modules/webpack-dev-middleware/package.json

@@ -0,0 +1,104 @@
+{
+  "_from": "webpack-dev-middleware@^3.0.1",
+  "_id": "webpack-dev-middleware@3.7.0",
+  "_inBundle": false,
+  "_integrity": "sha512-qvDesR1QZRIAZHOE3iQ4CXLZZSQ1lAUsSpnQmlB1PBfoN/xdRjmge3Dok0W4IdaVLJOGJy3sGI4sZHwjRU0PCA==",
+  "_location": "/webpack-dev-middleware",
+  "_phantomChildren": {},
+  "_requested": {
+    "type": "range",
+    "registry": true,
+    "raw": "webpack-dev-middleware@^3.0.1",
+    "name": "webpack-dev-middleware",
+    "escapedName": "webpack-dev-middleware",
+    "rawSpec": "^3.0.1",
+    "saveSpec": null,
+    "fetchSpec": "^3.0.1"
+  },
+  "_requiredBy": [
+    "/gatsby",
+    "/webpack-dev-server"
+  ],
+  "_resolved": "https://registry.npmjs.org/webpack-dev-middleware/-/webpack-dev-middleware-3.7.0.tgz",
+  "_shasum": "ef751d25f4e9a5c8a35da600c5fda3582b5c6cff",
+  "_spec": "webpack-dev-middleware@^3.0.1",
+  "_where": "/Users/stefanfejes/Projects/30-seconds-of-python-code/node_modules/gatsby",
+  "author": {
+    "name": "Tobias Koppers @sokra"
+  },
+  "bugs": {
+    "url": "https://github.com/webpack/webpack-dev-middleware/issues"
+  },
+  "bundleDependencies": false,
+  "dependencies": {
+    "memory-fs": "^0.4.1",
+    "mime": "^2.4.2",
+    "range-parser": "^1.2.1",
+    "webpack-log": "^2.0.0"
+  },
+  "deprecated": false,
+  "description": "A development middleware for webpack",
+  "devDependencies": {
+    "@babel/cli": "7.4.4",
+    "@babel/core": "7.4.4",
+    "@babel/preset-env": "7.4.4",
+    "@commitlint/cli": "7.6.1",
+    "@commitlint/config-conventional": "7.6.0",
+    "@webpack-contrib/defaults": "4.0.1",
+    "@webpack-contrib/eslint-config-webpack": "3.0.0",
+    "babel-jest": "24.8.0",
+    "commitlint-azure-pipelines-cli": "1.0.1",
+    "cross-env": "5.2.0",
+    "del": "4.1.1",
+    "del-cli": "1.1.0",
+    "eslint": "5.16.0",
+    "eslint-plugin-import": "2.17.2",
+    "eslint-plugin-prettier": "3.1.0",
+    "express": "4.16.4",
+    "file-loader": "3.0.1",
+    "husky": "2.3.0",
+    "jest": "24.8.0",
+    "jest-junit": "6.4.0",
+    "lint-staged": "8.1.7",
+    "prettier": "1.17.1",
+    "standard-version": "6.0.1",
+    "supertest": "4.0.2",
+    "webpack": "4.31.0"
+  },
+  "engines": {
+    "node": ">= 6"
+  },
+  "files": [
+    "lib",
+    "index.js"
+  ],
+  "homepage": "https://github.com/webpack/webpack-dev-middleware",
+  "keywords": [
+    "webpack",
+    "middleware",
+    "develompent"
+  ],
+  "license": "MIT",
+  "main": "index.js",
+  "name": "webpack-dev-middleware",
+  "peerDependencies": {
+    "webpack": "^4.0.0"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/webpack/webpack-dev-middleware.git"
+  },
+  "scripts": {
+    "commitlint": "commitlint --from=master",
+    "defaults": "webpack-defaults",
+    "lint": "eslint --cache lib test",
+    "pretest": "npm run lint",
+    "release": "standard-version",
+    "security": "npm audit",
+    "test": "npm run test:coverage",
+    "test:coverage": "npm run test:only -- --coverage",
+    "test:only": "jest",
+    "test:watch": "npm run test:only --watch"
+  },
+  "version": "3.7.0"
+}