chushihua

node_modules/webpack/lib/ConstPlugin.js

@@ -0,0 +1,60 @@
+/*
+	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 ParserHelpers = require("./ParserHelpers");
+
+const getQuery = (request) => {
+	const i = request.indexOf("?");
+	return request.indexOf("?") < 0 ? "" : request.substr(i);
+};
+
+class ConstPlugin {
+	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 => {
+				parser.plugin("statement if", function(statement) {
+					const param = this.evaluateExpression(statement.test);
+					const bool = param.asBool();
+					if(typeof bool === "boolean") {
+						if(statement.test.type !== "Literal") {
+							const dep = new ConstDependency(`${bool}`, param.range);
+							dep.loc = statement.loc;
+							this.state.current.addDependency(dep);
+						}
+						return bool;
+					}
+				});
+				parser.plugin("expression ?:", function(expression) {
+					const param = this.evaluateExpression(expression.test);
+					const bool = param.asBool();
+					if(typeof bool === "boolean") {
+						if(expression.test.type !== "Literal") {
+							const dep = new ConstDependency(` ${bool}`, param.range);
+							dep.loc = expression.loc;
+							this.state.current.addDependency(dep);
+						}
+						return bool;
+					}
+				});
+				parser.plugin("evaluate Identifier __resourceQuery", function(expr) {
+					if(!this.state.module) return;
+					return ParserHelpers.evaluateToString(getQuery(this.state.module.resource))(expr);
+				});
+				parser.plugin("expression __resourceQuery", function() {
+					if(!this.state.module) return;
+					this.state.current.addVariable("__resourceQuery", JSON.stringify(getQuery(this.state.module.resource)));
+					return true;
+				});
+			});
+		});
+	}
+}
+
+module.exports = ConstPlugin;