text: /*
  	MIT License http://www.opensource.org/licenses/mit-license.php
  	Author Tobias Koppers @sokra
  */
  "use strict";
  
  const RequireEnsureItemDependency = require("./RequireEnsureItemDependency");
  const RequireEnsureDependency = require("./RequireEnsureDependency");
  
  const NullFactory = require("../NullFactory");
  
  const RequireEnsureDependenciesBlockParserPlugin = require("./RequireEnsureDependenciesBlockParserPlugin");
  
  const ParserHelpers = require("../ParserHelpers");
  
  class RequireEnsurePlugin {
  
  	apply(compiler) {
  		compiler.hooks.compilation.tap("RequireEnsurePlugin", (compilation, {
  			normalModuleFactory
  		}) => {
  			compilation.dependencyFactories.set(RequireEnsureItemDependency, normalModuleFactory);
  			compilation.dependencyTemplates.set(RequireEnsureItemDependency, new RequireEnsureItemDependency.Template());
  
  			compilation.dependencyFactories.set(RequireEnsureDependency, new NullFactory());
  			compilation.dependencyTemplates.set(RequireEnsureDependency, new RequireEnsureDependency.Template());
  
  			const handler = (parser, parserOptions) => {
  				if(typeof parserOptions.requireEnsure !== "undefined" && !parserOptions.requireEnsure)
  					return;
  
  				new RequireEnsureDependenciesBlockParserPlugin().apply(parser);
  				parser.hooks.evaluateTypeof.for("require.ensure").tap("RequireEnsurePlugin", ParserHelpers.evaluateToString("function"));
  				parser.hooks.typeof.for("require.ensure").tap("RequireEnsurePlugin", ParserHelpers.toConstantDependency(parser, JSON.stringify("function")));
  			};
  
  			normalModuleFactory.hooks.parser.for("javascript/auto").tap("RequireEnsurePlugin", handler);
  			normalModuleFactory.hooks.parser.for("javascript/dynamic").tap("RequireEnsurePlugin", handler);
  		});
  	}
  }
  module.exports = RequireEnsurePlugin;
  