init

马宇豪

2024-07-16 f591c27b57e2418c9495bc02ae8cfff84d35bc18

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/*
    MIT License http://www.opensource.org/licenses/mit-license.php
    Author Tobias Koppers @sokra
*/
 
"use strict";
 
/** @typedef {import("./Resolver")} Resolver */
/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
 
const namespaceStartCharCode = "@".charCodeAt(0);
 
module.exports = class JoinRequestPartPlugin {
    /**
     * @param {string | ResolveStepHook} source source
     * @param {string | ResolveStepHook} target target
     */
    constructor(source, target) {
        this.source = source;
        this.target = target;
    }
 
    /**
     * @param {Resolver} resolver the resolver
     * @returns {void}
     */
    apply(resolver) {
        const target = resolver.ensureHook(this.target);
        resolver
            .getHook(this.source)
            .tapAsync(
                "JoinRequestPartPlugin",
                (request, resolveContext, callback) => {
                    const req = request.request || "";
                    let i = req.indexOf("/", 3);
 
                    if (i >= 0 && req.charCodeAt(2) === namespaceStartCharCode) {
                        i = req.indexOf("/", i + 1);
                    }
 
                    /** @type {string} */
                    let moduleName;
                    /** @type {string} */
                    let remainingRequest;
                    /** @type {boolean} */
                    let fullySpecified;
                    if (i < 0) {
                        moduleName = req;
                        remainingRequest = ".";
                        fullySpecified = false;
                    } else {
                        moduleName = req.slice(0, i);
                        remainingRequest = "." + req.slice(i);
                        fullySpecified = /** @type {boolean} */ (request.fullySpecified);
                    }
                    /** @type {ResolveRequest} */
                    const obj = {
                        ...request,
                        path: resolver.join(
                            /** @type {string} */
                            (request.path),
                            moduleName
                        ),
                        relativePath:
                            request.relativePath &&
                            resolver.join(request.relativePath, moduleName),
                        request: remainingRequest,
                        fullySpecified
                    };
                    resolver.doResolve(target, obj, null, resolveContext, callback);
                }
            );
    }
};