WIP - add extractor, generate snippet_data

node_modules/webpack/lib/node/NodeSourcePlugin.js

@@ -0,0 +1,141 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+const AliasPlugin = require("enhanced-resolve/lib/AliasPlugin");
+const ParserHelpers = require("../ParserHelpers");
+const nodeLibsBrowser = require("node-libs-browser");
+
+module.exports = class NodeSourcePlugin {
+	constructor(options) {
+		this.options = options;
+	}
+	apply(compiler) {
+		const options = this.options;
+		if (options === false) {
+			// allow single kill switch to turn off this plugin
+			return;
+		}
+
+		const getPathToModule = (module, type) => {
+			if (type === true || (type === undefined && nodeLibsBrowser[module])) {
+				if (!nodeLibsBrowser[module]) {
+					throw new Error(
+						`No browser version for node.js core module ${module} available`
+					);
+				}
+				return nodeLibsBrowser[module];
+			} else if (type === "mock") {
+				return require.resolve(`node-libs-browser/mock/${module}`);
+			} else if (type === "empty") {
+				return require.resolve("node-libs-browser/mock/empty");
+			} else {
+				return module;
+			}
+		};
+
+		const addExpression = (parser, name, module, type, suffix) => {
+			suffix = suffix || "";
+			parser.hooks.expression.for(name).tap("NodeSourcePlugin", () => {
+				if (
+					parser.state.module &&
+					parser.state.module.resource === getPathToModule(module, type)
+				)
+					return;
+				const mockModule = ParserHelpers.requireFileAsExpression(
+					parser.state.module.context,
+					getPathToModule(module, type)
+				);
+				return ParserHelpers.addParsedVariableToModule(
+					parser,
+					name,
+					mockModule + suffix
+				);
+			});
+		};
+
+		compiler.hooks.compilation.tap(
+			"NodeSourcePlugin",
+			(compilation, { normalModuleFactory }) => {
+				const handler = (parser, parserOptions) => {
+					if (parserOptions.node === false) return;
+
+					let localOptions = options;
+					if (parserOptions.node) {
+						localOptions = Object.assign({}, localOptions, parserOptions.node);
+					}
+					if (localOptions.global) {
+						parser.hooks.expression
+							.for("global")
+							.tap("NodeSourcePlugin", () => {
+								const retrieveGlobalModule = ParserHelpers.requireFileAsExpression(
+									parser.state.module.context,
+									require.resolve("../../buildin/global")
+								);
+								return ParserHelpers.addParsedVariableToModule(
+									parser,
+									"global",
+									retrieveGlobalModule
+								);
+							});
+					}
+					if (localOptions.process) {
+						const processType = localOptions.process;
+						addExpression(parser, "process", "process", processType);
+					}
+					if (localOptions.console) {
+						const consoleType = localOptions.console;
+						addExpression(parser, "console", "console", consoleType);
+					}
+					const bufferType = localOptions.Buffer;
+					if (bufferType) {
+						addExpression(parser, "Buffer", "buffer", bufferType, ".Buffer");
+					}
+					if (localOptions.setImmediate) {
+						const setImmediateType = localOptions.setImmediate;
+						addExpression(
+							parser,
+							"setImmediate",
+							"timers",
+							setImmediateType,
+							".setImmediate"
+						);
+						addExpression(
+							parser,
+							"clearImmediate",
+							"timers",
+							setImmediateType,
+							".clearImmediate"
+						);
+					}
+				};
+				normalModuleFactory.hooks.parser
+					.for("javascript/auto")
+					.tap("NodeSourcePlugin", handler);
+				normalModuleFactory.hooks.parser
+					.for("javascript/dynamic")
+					.tap("NodeSourcePlugin", handler);
+			}
+		);
+		compiler.hooks.afterResolvers.tap("NodeSourcePlugin", compiler => {
+			for (const lib of Object.keys(nodeLibsBrowser)) {
+				if (options[lib] !== false) {
+					compiler.resolverFactory.hooks.resolver
+						.for("normal")
+						.tap("NodeSourcePlugin", resolver => {
+							new AliasPlugin(
+								"described-resolve",
+								{
+									name: lib,
+									onlyModule: true,
+									alias: getPathToModule(lib, options[lib])
+								},
+								"resolve"
+							).apply(resolver);
+						});
+				}
+			}
+		});
+	}
+};