126 lines
3.1 KiB
JavaScript
126 lines
3.1 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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const WebpackError = require("../WebpackError");
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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(
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"SystemPlugin",
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(compilation, { normalModuleFactory }) => {
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const handler = (parser, parserOptions) => {
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if (
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typeof parserOptions.system !== "undefined" &&
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!parserOptions.system
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)
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return;
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const shouldWarn = typeof parserOptions.system === "undefined";
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const setNotSupported = name => {
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parser.hooks.evaluateTypeof
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.for(name)
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.tap("SystemPlugin", ParserHelpers.evaluateToString("undefined"));
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parser.hooks.expression
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.for(name)
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.tap(
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"SystemPlugin",
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ParserHelpers.expressionIsUnsupported(
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parser,
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name + " is not supported by webpack."
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)
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);
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};
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parser.hooks.typeof
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.for("System.import")
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.tap(
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"SystemPlugin",
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ParserHelpers.toConstantDependency(
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parser,
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JSON.stringify("function")
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)
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);
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parser.hooks.evaluateTypeof
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.for("System.import")
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.tap("SystemPlugin", ParserHelpers.evaluateToString("function"));
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parser.hooks.typeof
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.for("System")
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.tap(
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"SystemPlugin",
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ParserHelpers.toConstantDependency(
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parser,
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JSON.stringify("object")
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)
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);
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parser.hooks.evaluateTypeof
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.for("System")
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.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,
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require.resolve("../../buildin/system.js")
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);
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return ParserHelpers.addParsedVariableToModule(
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parser,
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"System",
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systemPolyfillRequire
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);
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});
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parser.hooks.call.for("System.import").tap("SystemPlugin", expr => {
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if (shouldWarn) {
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parser.state.module.warnings.push(
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new SystemImportDeprecationWarning(
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parser.state.module,
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expr.loc
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)
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);
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}
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return parser.hooks.importCall.call(expr);
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});
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};
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normalModuleFactory.hooks.parser
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.for("javascript/auto")
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.tap("SystemPlugin", handler);
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normalModuleFactory.hooks.parser
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.for("javascript/dynamic")
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.tap("SystemPlugin", handler);
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}
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);
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}
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}
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class SystemImportDeprecationWarning extends WebpackError {
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constructor(module, loc) {
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super(
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"System.import() is deprecated and will be removed soon. Use import() instead.\n" +
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"For more info visit https://webpack.js.org/guides/code-splitting/"
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);
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this.name = "SystemImportDeprecationWarning";
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this.module = module;
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this.loc = loc;
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Error.captureStackTrace(this, this.constructor);
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}
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}
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module.exports = SystemPlugin;
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