feat: initial commit

node_modules/enhanced-resolve/lib/SelfReferencePlugin.js

@@ -0,0 +1,82 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const DescriptionFileUtils = require("./DescriptionFileUtils");
+
+/** @typedef {import("./Resolver")} Resolver */
+/** @typedef {import("./Resolver").JsonObject} JsonObject */
+/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
+/** @typedef {import("./Resolver").ResolveStepHook} ResolveStepHook */
+
+const slashCode = "/".charCodeAt(0);
+
+module.exports = class SelfReferencePlugin {
+	/**
+	 * @param {string | ResolveStepHook} source source
+	 * @param {string | string[]} fieldNamePath name path
+	 * @param {string | ResolveStepHook} target target
+	 */
+	constructor(source, fieldNamePath, target) {
+		this.source = source;
+		this.target = target;
+		this.fieldName = fieldNamePath;
+	}
+
+	/**
+	 * @param {Resolver} resolver the resolver
+	 * @returns {void}
+	 */
+	apply(resolver) {
+		const target = resolver.ensureHook(this.target);
+		resolver
+			.getHook(this.source)
+			.tapAsync("SelfReferencePlugin", (request, resolveContext, callback) => {
+				if (!request.descriptionFilePath) return callback();
+
+				const req = request.request;
+				if (!req) return callback();
+
+				// Feature is only enabled when an exports field is present
+				const exportsField = DescriptionFileUtils.getField(
+					/** @type {JsonObject} */ (request.descriptionFileData),
+					this.fieldName
+				);
+				if (!exportsField) return callback();
+
+				const name = DescriptionFileUtils.getField(
+					/** @type {JsonObject} */ (request.descriptionFileData),
+					"name"
+				);
+				if (typeof name !== "string") return callback();
+
+				if (
+					req.startsWith(name) &&
+					(req.length === name.length ||
+						req.charCodeAt(name.length) === slashCode)
+				) {
+					const remainingRequest = `.${req.slice(name.length)}`;
+					/** @type {ResolveRequest} */
+					const obj = {
+						...request,
+						request: remainingRequest,
+						path: /** @type {string} */ (request.descriptionFileRoot),
+						relativePath: "."
+					};
+
+					resolver.doResolve(
+						target,
+						obj,
+						"self reference",
+						resolveContext,
+						callback
+					);
+				} else {
+					return callback();
+				}
+			});
+	}
+};