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 path = require("path");
const ParserHelpers = require("./ParserHelpers");
const ConstDependency = require("./dependencies/ConstDependency");
 
const NullFactory = require("./NullFactory");
 
class NodeStuffPlugin {
    constructor(options) {
        this.options = options;
    }
 
    apply(compiler) {
        const options = this.options;
        compiler.hooks.compilation.tap(
            "NodeStuffPlugin",
            (compilation, { normalModuleFactory }) => {
                compilation.dependencyFactories.set(ConstDependency, new NullFactory());
                compilation.dependencyTemplates.set(
                    ConstDependency,
                    new ConstDependency.Template()
                );
 
                const handler = (parser, parserOptions) => {
                    if (parserOptions.node === false) return;
 
                    let localOptions = options;
                    if (parserOptions.node) {
                        localOptions = Object.assign({}, localOptions, parserOptions.node);
                    }
 
                    const setConstant = (expressionName, value) => {
                        parser.hooks.expression
                            .for(expressionName)
                            .tap("NodeStuffPlugin", () => {
                                parser.state.current.addVariable(
                                    expressionName,
                                    JSON.stringify(value)
                                );
                                return true;
                            });
                    };
 
                    const setModuleConstant = (expressionName, fn) => {
                        parser.hooks.expression
                            .for(expressionName)
                            .tap("NodeStuffPlugin", () => {
                                parser.state.current.addVariable(
                                    expressionName,
                                    JSON.stringify(fn(parser.state.module))
                                );
                                return true;
                            });
                    };
                    const context = compiler.context;
                    if (localOptions.__filename) {
                        if (localOptions.__filename === "mock") {
                            setConstant("__filename", "/index.js");
                        } else {
                            setModuleConstant("__filename", module =>
                                path.relative(context, module.resource)
                            );
                        }
                        parser.hooks.evaluateIdentifier
                            .for("__filename")
                            .tap("NodeStuffPlugin", expr => {
                                if (!parser.state.module) return;
                                const resource = parser.state.module.resource;
                                const i = resource.indexOf("?");
                                return ParserHelpers.evaluateToString(
                                    i < 0 ? resource : resource.substr(0, i)
                                )(expr);
                            });
                    }
                    if (localOptions.__dirname) {
                        if (localOptions.__dirname === "mock") {
                            setConstant("__dirname", "/");
                        } else {
                            setModuleConstant("__dirname", module =>
                                path.relative(context, module.context)
                            );
                        }
                        parser.hooks.evaluateIdentifier
                            .for("__dirname")
                            .tap("NodeStuffPlugin", expr => {
                                if (!parser.state.module) return;
                                return ParserHelpers.evaluateToString(
                                    parser.state.module.context
                                )(expr);
                            });
                    }
                    parser.hooks.expression
                        .for("require.extensions")
                        .tap(
                            "NodeStuffPlugin",
                            ParserHelpers.expressionIsUnsupported(
                                parser,
                                "require.extensions is not supported by webpack. Use a loader instead."
                            )
                        );
                };
 
                normalModuleFactory.hooks.parser
                    .for("javascript/auto")
                    .tap("NodeStuffPlugin", handler);
                normalModuleFactory.hooks.parser
                    .for("javascript/dynamic")
                    .tap("NodeStuffPlugin", handler);
            }
        );
    }
}
module.exports = NodeStuffPlugin;