mirror of https://github.com/webpack/webpack.git
50 lines
1.9 KiB
JavaScript
50 lines
1.9 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const ParserHelpers = require("../ParserHelpers");
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class SystemPlugin {
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constructor(options) {
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this.options = options;
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}
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apply(compiler) {
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compiler.hooks.compilation.tap("SystemPlugin", (compilation, {
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normalModuleFactory
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}) => {
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const handler = (parser, parserOptions) => {
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if(typeof parserOptions.system !== "undefined" && !parserOptions.system)
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return;
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const setNotSupported = name => {
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parser.hooks.evaluateTypeof.for(name).tap("SystemPlugin", ParserHelpers.evaluateToString("undefined"));
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parser.hooks.expression.for(name).tap("SystemPlugin",
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ParserHelpers.expressionIsUnsupported(parser, name + " is not supported by webpack.")
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);
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};
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parser.hooks.typeof.for("System.import").tap("SystemPlugin", ParserHelpers.toConstantDependency(parser, JSON.stringify("function")));
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parser.hooks.evaluateTypeof.for("System.import").tap("SystemPlugin", ParserHelpers.evaluateToString("function"));
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parser.hooks.typeof.for("System").tap("SystemPlugin", ParserHelpers.toConstantDependency(parser, JSON.stringify("object")));
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parser.hooks.evaluateTypeof.for("System").tap("SystemPlugin", ParserHelpers.evaluateToString("object"));
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setNotSupported("System.set");
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setNotSupported("System.get");
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setNotSupported("System.register");
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parser.hooks.expression.for("System").tap("SystemPlugin", () => {
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const systemPolyfillRequire = ParserHelpers.requireFileAsExpression(
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parser.state.module.context, require.resolve("../../buildin/system.js"));
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return ParserHelpers.addParsedVariableToModule(parser, "System", systemPolyfillRequire);
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});
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};
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normalModuleFactory.hooks.parser.for("javascript/auto").tap("SystemPlugin", handler);
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normalModuleFactory.hooks.parser.for("javascript/dynamic").tap("SystemPlugin", handler);
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});
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}
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}
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module.exports = SystemPlugin;
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