chushihua

node_modules/webpack/lib/CompatibilityPlugin.js

@@ -0,0 +1,57 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const ConstDependency = require("./dependencies/ConstDependency");
+
+const NullFactory = require("./NullFactory");
+
+const jsonLoaderPath = require.resolve("json-loader");
+const matchJson = /\.json$/i;
+
+class CompatibilityPlugin {
+
+	apply(compiler) {
+		compiler.plugin("compilation", (compilation, params) => {
+			compilation.dependencyFactories.set(ConstDependency, new NullFactory());
+			compilation.dependencyTemplates.set(ConstDependency, new ConstDependency.Template());
+
+			params.normalModuleFactory.plugin("parser", (parser, parserOptions) => {
+
+				if(typeof parserOptions.browserify !== "undefined" && !parserOptions.browserify)
+					return;
+
+				parser.plugin("call require", (expr) => {
+					// support for browserify style require delegator: "require(o, !0)"
+					if(expr.arguments.length !== 2) return;
+					const second = parser.evaluateExpression(expr.arguments[1]);
+					if(!second.isBoolean()) return;
+					if(second.asBool() !== true) return;
+					const dep = new ConstDependency("require", expr.callee.range);
+					dep.loc = expr.loc;
+					if(parser.state.current.dependencies.length > 1) {
+						const last = parser.state.current.dependencies[parser.state.current.dependencies.length - 1];
+						if(last.critical && last.request === "." && last.userRequest === "." && last.recursive)
+							parser.state.current.dependencies.pop();
+					}
+					parser.state.current.addDependency(dep);
+					return true;
+				});
+			});
+
+			params.normalModuleFactory.plugin("after-resolve", (data, done) => {
+				// if this is a json file and there are no loaders active, we use the json-loader in order to avoid parse errors
+				// @see https://github.com/webpack/webpack/issues/3363
+				if(matchJson.test(data.request) && data.loaders.length === 0) {
+					data.loaders.push({
+						loader: jsonLoaderPath
+					});
+				}
+				done(null, data);
+			});
+		});
+	}
+}
+module.exports = CompatibilityPlugin;