webpack/lib/dependencies/RequireEnsurePlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
var RequireEnsureItemDependency = require("./RequireEnsureItemDependency");
var RequireEnsureDependency = require("./RequireEnsureDependency");
var ConstDependency = require("./ConstDependency");

var NullFactory = require("../NullFactory");

var RequireEnsureDependenciesBlockParserPlugin = require("./RequireEnsureDependenciesBlockParserPlugin");

var BasicEvaluatedExpression = require("../BasicEvaluatedExpression");

function RequireEnsurePlugin() {
}
module.exports = RequireEnsurePlugin;

RequireEnsurePlugin.prototype.apply = function(compiler) {
	compiler.plugin("compilation", function(compilation, params) {
		var normalModuleFactory = params.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());
	});
	new RequireEnsureDependenciesBlockParserPlugin().apply(compiler.parser);
	compiler.parser.plugin("evaluate typeof require.ensure", function(expr) {
		return new BasicEvaluatedExpression().setString("function").setRange(expr.range);
	});
	compiler.parser.plugin("typeof require.ensure", function(expr) {
		var dep = new ConstDependency("'function'", expr.range);
		dep.loc = expr.loc;
		this.state.current.addDependency(dep);
		return true;
	});
};