webpack/lib/dependencies/AMDRequireDependenciesBlockParserPlugin.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 AMDRequireItemDependency = require("./AMDRequireItemDependency");
var AMDRequireArrayDependency = require("./AMDRequireArrayDependency");
var AMDRequireContextDependency = require("./AMDRequireContextDependency");
var AMDRequireDependenciesBlock = require("./AMDRequireDependenciesBlock");
var LocalModuleDependency = require("./LocalModuleDependency");
var ContextDependencyHelpers = require("./ContextDependencyHelpers");
var LocalModulesHelpers = require("./LocalModulesHelpers");

function AMDRequireDependenciesBlockParserPlugin(options) {
	this.options = options;
}

module.exports = AMDRequireDependenciesBlockParserPlugin;

AMDRequireDependenciesBlockParserPlugin.prototype.apply = function(parser) {
	var options = this.options;
	parser.plugin("call require", function(expr) {
		switch(expr.arguments.length) {
		case 1:
			var param = this.evaluateExpression(expr.arguments[0]);
			var result;
			var dep = new AMDRequireDependenciesBlock(expr, param.range, null, this.state.module, expr.loc);
			var old = this.state.current;
			this.state.current = dep;
			this.inScope([], function() {
				result = this.applyPluginsBailResult("call require:amd:array", expr, param);
			}.bind(this));
			this.state.current = old;
			if(!result) return;
			this.state.current.addBlock(dep);
			return true;
		case 2:
			var param = this.evaluateExpression(expr.arguments[0]);
			var dep = new AMDRequireDependenciesBlock(expr, param.range, expr.arguments[1].range, this.state.module, expr.loc);
			dep.loc = expr.loc;
			var old = this.state.current;
			this.state.current = dep;
			try {
				var result;
				this.inScope([], function() {
					result = this.applyPluginsBailResult("call require:amd:array", expr, param);
				}.bind(this));
				if(!result) return;
				if(expr.arguments[1].type === "FunctionExpression") {
					this.inScope(expr.arguments[1].params.filter(function(i) {
						return ["require", "module", "exports"].indexOf(i.name) < 0;
					}), function() {
						if(expr.arguments[1].body.type === "BlockStatement")
							this.walkStatement(expr.arguments[1].body);
						else
							this.walkExpression(expr.arguments[1].body);
					}.bind(this));
				}
			} finally {
				this.state.current = old;
				this.state.current.addBlock(dep);
			}
			return true;
		}
	});
	parser.plugin("call require:amd:array", function(expr, param) {
		if(param.isArray()) {
			param.items.forEach(function(param) {
				var result = this.applyPluginsBailResult("call require:amd:item", expr, param);
				if(result === undefined) {
					this.applyPluginsBailResult("call require:amd:context", expr, param);
				}
			}, this);
			return true;
		} else if(param.isConstArray()) {
			var deps = [];
			param.array.forEach(function(request) {
				var dep, localModule;
				if(request === "require") {
					dep = "__webpack_require__";
				} else if(["exports", "module"].indexOf(request) >= 0) {
					dep = request;
				} else if(localModule = LocalModulesHelpers.getLocalModule(this.state, request)) {
					dep = new LocalModuleDependency(localModule);
					dep.loc = expr.loc;
					this.state.current.addDependency(dep);
				} else {
					dep = new AMDRequireItemDependency(request);
					dep.loc = expr.loc;
					dep.optional = !!this.scope.inTry;
					this.state.current.addDependency(dep);
				}
				deps.push(dep);
			}, this);
			var dep = new AMDRequireArrayDependency(deps, param.range);
			dep.loc = expr.loc;
			dep.optional = !!this.scope.inTry;
			this.state.current.addDependency(dep);
			return true;
		}
	});
	parser.plugin("call require:amd:item", function(expr, param) {
		if(param.isConditional()) {
			param.options.forEach(function(param) {
				var result = this.applyPluginsBailResult("call require:amd:item", expr, param);
				if(result === undefined) {
					this.applyPluginsBailResult("call require:amd:context", expr, param);
				}
			}, this);
			return true;
		} else if(param.isString()) {
			var dep, localModule;
			if(param.string === "require") {
				dep = new ConstDependency("__webpack_require__", param.string);
			} else if(["exports", "module"].indexOf(param.string) >= 0) {
				dep = new ConstDependency(param.string, param.range);
			} else if(localModule = LocalModulesHelpers.getLocalModule(this.state, param.string)) {
				dep = new LocalModuleDependency(localModule, param.range);
			} else {
				dep = new AMDRequireItemDependency(param.string, param.range);
			}
			dep.loc = expr.loc;
			dep.optional = !!this.scope.inTry;
			this.state.current.addDependency(dep);
			return true;
		}
	});
	parser.plugin("call require:amd:context", function(expr, param) {
		var dep = ContextDependencyHelpers.create(AMDRequireContextDependency, param.range, param, expr, options);
		if(!dep) return;
		dep.loc = expr.loc;
		dep.optional = !!this.scope.inTry;
		this.state.current.addDependency(dep);
		return true;
	});
};