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 ExternalModule = require("./ExternalModule");
 
class ExternalModuleFactoryPlugin {
    constructor(type, externals) {
        this.type = type;
        this.externals = externals;
    }
 
    apply(normalModuleFactory) {
        const globalType = this.type;
        normalModuleFactory.hooks.factory.tap(
            "ExternalModuleFactoryPlugin",
            factory => (data, callback) => {
                const context = data.context;
                const dependency = data.dependencies[0];
 
                const handleExternal = (value, type, callback) => {
                    if (typeof type === "function") {
                        callback = type;
                        type = undefined;
                    }
                    if (value === false) return factory(data, callback);
                    if (value === true) value = dependency.request;
                    if (type === undefined && /^[a-z0-9]+ /.test(value)) {
                        const idx = value.indexOf(" ");
                        type = value.substr(0, idx);
                        value = value.substr(idx + 1);
                    }
                    callback(
                        null,
                        new ExternalModule(value, type || globalType, dependency.request)
                    );
                    return true;
                };
 
                const handleExternals = (externals, callback) => {
                    if (typeof externals === "string") {
                        if (externals === dependency.request) {
                            return handleExternal(dependency.request, callback);
                        }
                    } else if (Array.isArray(externals)) {
                        let i = 0;
                        const next = () => {
                            let asyncFlag;
                            const handleExternalsAndCallback = (err, module) => {
                                if (err) return callback(err);
                                if (!module) {
                                    if (asyncFlag) {
                                        asyncFlag = false;
                                        return;
                                    }
                                    return next();
                                }
                                callback(null, module);
                            };
 
                            do {
                                asyncFlag = true;
                                if (i >= externals.length) return callback();
                                handleExternals(externals[i++], handleExternalsAndCallback);
                            } while (!asyncFlag);
                            asyncFlag = false;
                        };
 
                        next();
                        return;
                    } else if (externals instanceof RegExp) {
                        if (externals.test(dependency.request)) {
                            return handleExternal(dependency.request, callback);
                        }
                    } else if (typeof externals === "function") {
                        externals.call(
                            null,
                            context,
                            dependency.request,
                            (err, value, type) => {
                                if (err) return callback(err);
                                if (value !== undefined) {
                                    handleExternal(value, type, callback);
                                } else {
                                    callback();
                                }
                            }
                        );
                        return;
                    } else if (
                        typeof externals === "object" &&
                        Object.prototype.hasOwnProperty.call(externals, dependency.request)
                    ) {
                        return handleExternal(externals[dependency.request], callback);
                    }
                    callback();
                };
 
                handleExternals(this.externals, (err, module) => {
                    if (err) return callback(err);
                    if (!module) return handleExternal(false, callback);
                    return callback(null, module);
                });
            }
        );
    }
}
module.exports = ExternalModuleFactoryPlugin;