chushihua

node_modules/webpack/lib/ExternalModule.js

@@ -0,0 +1,128 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+const Module = require("./Module");
+const OriginalSource = require("webpack-sources").OriginalSource;
+const RawSource = require("webpack-sources").RawSource;
+const WebpackMissingModule = require("./dependencies/WebpackMissingModule");
+const Template = require("./Template");
+
+class ExternalModule extends Module {
+	constructor(request, type, userRequest) {
+		super();
+		this.request = request;
+		this.userRequest = userRequest;
+		this.type = type;
+		this.built = false;
+		this.external = true;
+	}
+
+	libIdent() {
+		return this.userRequest;
+	}
+
+	chunkCondition(chunk) {
+		return chunk.hasEntryModule();
+	}
+
+	identifier() {
+		return "external " + JSON.stringify(this.request);
+	}
+
+	readableIdentifier() {
+		return "external " + JSON.stringify(this.request);
+	}
+
+	needRebuild() {
+		return false;
+	}
+
+	build(options, compilation, resolver, fs, callback) {
+		this.builtTime = Date.now();
+		callback();
+	}
+
+	getSourceForGlobalVariableExternal(variableName, type) {
+		if(!Array.isArray(variableName)) {
+			// make it an array as the look up works the same basically
+			variableName = [variableName];
+		}
+
+		// needed for e.g. window["some"]["thing"]
+		const objectLookup = variableName.map(r => `[${JSON.stringify(r)}]`).join("");
+		return `(function() { module.exports = ${type}${objectLookup}; }());`;
+	}
+
+	getSourceForCommonJsExternal(moduleAndSpecifiers) {
+		if(!Array.isArray(moduleAndSpecifiers)) {
+			return `module.exports = require(${JSON.stringify(moduleAndSpecifiers)});`;
+		}
+
+		const moduleName = moduleAndSpecifiers[0];
+		const objectLookup = moduleAndSpecifiers.slice(1).map(r => `[${JSON.stringify(r)}]`).join("");
+		return `module.exports = require(${moduleName})${objectLookup};`;
+	}
+
+	checkExternalVariable(variableToCheck, request) {
+		return `if(typeof ${variableToCheck} === 'undefined') {${WebpackMissingModule.moduleCode(request)}}\n`;
+	}
+
+	getSourceForAmdOrUmdExternal(id, optional, request) {
+		const externalVariable = Template.toIdentifier(`__WEBPACK_EXTERNAL_MODULE_${id}__`);
+		const missingModuleError = optional ? this.checkExternalVariable(externalVariable, request) : "";
+		return `${missingModuleError}module.exports = ${externalVariable};`;
+	}
+
+	getSourceForDefaultCase(optional, request) {
+		const missingModuleError = optional ? this.checkExternalVariable(request, request) : "";
+		return `${missingModuleError}module.exports = ${request};`;
+	}
+
+	getSourceString() {
+		const request = typeof this.request === "object" ? this.request[this.type] : this.request;
+		switch(this.type) {
+			case "this":
+			case "window":
+			case "global":
+				return this.getSourceForGlobalVariableExternal(request, this.type);
+			case "commonjs":
+			case "commonjs2":
+				return this.getSourceForCommonJsExternal(request);
+			case "amd":
+			case "umd":
+			case "umd2":
+				return this.getSourceForAmdOrUmdExternal(this.id, this.optional, request);
+			default:
+				return this.getSourceForDefaultCase(this.optional, request);
+		}
+	}
+
+	getSource(sourceString) {
+		if(this.useSourceMap) {
+			return new OriginalSource(sourceString, this.identifier());
+		}
+
+		return new RawSource(sourceString);
+	}
+
+	source() {
+		return this.getSource(
+			this.getSourceString()
+		);
+	}
+
+	size() {
+		return 42;
+	}
+
+	updateHash(hash) {
+		hash.update(this.type);
+		hash.update(JSON.stringify(this.request));
+		hash.update(JSON.stringify(Boolean(this.optional)));
+		super.updateHash(hash);
+	}
+}
+
+module.exports = ExternalModule;