source control 1.1

Tomas

2022-05-19 957a1f10a06fdbb76f1a0ba94fe44126c613fee3

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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
"use strict";
 
const ParserHelpers = require("../ParserHelpers");
const WebpackError = require("../WebpackError");
 
class SystemPlugin {
    constructor(options) {
        this.options = options;
    }
 
    apply(compiler) {
        compiler.hooks.compilation.tap(
            "SystemPlugin",
            (compilation, { normalModuleFactory }) => {
                const handler = (parser, parserOptions) => {
                    if (parserOptions.system !== undefined && !parserOptions.system)
                        return;
 
                    const shouldWarn = parserOptions.system === undefined;
 
                    const setNotSupported = name => {
                        parser.hooks.evaluateTypeof
                            .for(name)
                            .tap("SystemPlugin", ParserHelpers.evaluateToString("undefined"));
                        parser.hooks.expression
                            .for(name)
                            .tap(
                                "SystemPlugin",
                                ParserHelpers.expressionIsUnsupported(
                                    parser,
                                    name + " is not supported by webpack."
                                )
                            );
                    };
 
                    parser.hooks.typeof
                        .for("System.import")
                        .tap(
                            "SystemPlugin",
                            ParserHelpers.toConstantDependency(
                                parser,
                                JSON.stringify("function")
                            )
                        );
                    parser.hooks.evaluateTypeof
                        .for("System.import")
                        .tap("SystemPlugin", ParserHelpers.evaluateToString("function"));
                    parser.hooks.typeof
                        .for("System")
                        .tap(
                            "SystemPlugin",
                            ParserHelpers.toConstantDependency(
                                parser,
                                JSON.stringify("object")
                            )
                        );
                    parser.hooks.evaluateTypeof
                        .for("System")
                        .tap("SystemPlugin", ParserHelpers.evaluateToString("object"));
 
                    setNotSupported("System.set");
                    setNotSupported("System.get");
                    setNotSupported("System.register");
 
                    parser.hooks.expression.for("System").tap("SystemPlugin", () => {
                        const systemPolyfillRequire = ParserHelpers.requireFileAsExpression(
                            parser.state.module.context,
                            require.resolve("../../buildin/system")
                        );
                        return ParserHelpers.addParsedVariableToModule(
                            parser,
                            "System",
                            systemPolyfillRequire
                        );
                    });
 
                    parser.hooks.call.for("System.import").tap("SystemPlugin", expr => {
                        if (shouldWarn) {
                            parser.state.module.warnings.push(
                                new SystemImportDeprecationWarning(
                                    parser.state.module,
                                    expr.loc
                                )
                            );
                        }
 
                        return parser.hooks.importCall.call(expr);
                    });
                };
 
                normalModuleFactory.hooks.parser
                    .for("javascript/auto")
                    .tap("SystemPlugin", handler);
                normalModuleFactory.hooks.parser
                    .for("javascript/dynamic")
                    .tap("SystemPlugin", handler);
            }
        );
    }
}
 
class SystemImportDeprecationWarning extends WebpackError {
    constructor(module, loc) {
        super(
            "System.import() is deprecated and will be removed soon. Use import() instead.\n" +
                "For more info visit https://webpack.js.org/guides/code-splitting/"
        );
 
        this.name = "SystemImportDeprecationWarning";
 
        this.module = module;
        this.loc = loc;
 
        Error.captureStackTrace(this, this.constructor);
    }
}
 
module.exports = SystemPlugin;