guido/lib/utils/watchMissingNodeModulesPlugin.js

基于webpack4的一键式开发工具，集成handlebars、雪碧图、SVG Sprite、自定义资源注入等方式

/**
 * Copyright (c) 2015-present, Facebook, Inc.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 */

// This Webpack plugin ensures `npm install <library>` forces a project rebuild.
// We’re not sure why this isn't Webpack's default behavior.
// See https://github.com/facebook/create-react-app/issues/186.

'use strict';

class WatchMissingNodeModulesPlugin {
	constructor(nodeModulesPath) {
		this.nodeModulesPath = nodeModulesPath;
	}

	apply(compiler) {
		compiler.hooks.emit.tap(
			'WatchMissingNodeModulesPlugin',
			compilation => {
				var missingDeps = Array.from(compilation.missingDependencies);
				var nodeModulesPath = this.nodeModulesPath;

				// If any missing files are expected to appear in node_modules...
				if (missingDeps.some(file => file.includes(nodeModulesPath))) {
					// ...tell webpack to watch node_modules recursively until they appear.
					compilation.contextDependencies.add(nodeModulesPath);
				}
			}
		);
	}
}

module.exports = WatchMissingNodeModulesPlugin;