1 files changed, 198 insertions, 0 deletions
diff --git a/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js b/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js
new file mode 100644
index 00000000..cfa970bc
--- /dev/null
+++ b/node_modules/enhanced-resolve/lib/DescriptionFileUtils.js
@@ -0,0 +1,198 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const forEachBail = require("./forEachBail");
+
+/** @typedef {import("./Resolver")} Resolver */
+/** @typedef {import("./Resolver").JsonObject} JsonObject */
+/** @typedef {import("./Resolver").JsonValue} JsonValue */
+/** @typedef {import("./Resolver").ResolveContext} ResolveContext */
+/** @typedef {import("./Resolver").ResolveRequest} ResolveRequest */
+
+/**
+ * @typedef {Object} DescriptionFileInfo
+ * @property {JsonObject=} content
+ * @property {string} path
+ * @property {string} directory
+ */
+
+/**
+ * @callback ErrorFirstCallback
+ * @param {Error|null=} error
+ * @param {DescriptionFileInfo=} result
+ */
+
+/**
+ * @typedef {Object} Result
+ * @property {string} path path to description file
+ * @property {string} directory directory of description file
+ * @property {JsonObject} content content of description file
+ */
+
+/**
+ * @param {Resolver} resolver resolver
+ * @param {string} directory directory
+ * @param {string[]} filenames filenames
+ * @param {DescriptionFileInfo|undefined} oldInfo oldInfo
+ * @param {ResolveContext} resolveContext resolveContext
+ * @param {ErrorFirstCallback} callback callback
+ */
+function loadDescriptionFile(
+	resolver,
+	directory,
+	filenames,
+	oldInfo,
+	resolveContext,
+	callback
+) {
+	(function findDescriptionFile() {
+		if (oldInfo && oldInfo.directory === directory) {
+			// We already have info for this directory and can reuse it
+			return callback(null, oldInfo);
+		}
+		forEachBail(
+			filenames,
+			/**
+			 * @param {string} filename filename
+			 * @param {(err?: null|Error, result?: null|Result) => void} callback callback
+			 * @returns {void}
+			 */
+			(filename, callback) => {
+				const descriptionFilePath = resolver.join(directory, filename);
+				if (resolver.fileSystem.readJson) {
+					resolver.fileSystem.readJson(descriptionFilePath, (err, content) => {
+						if (err) {
+							if (typeof err.code !== "undefined") {
+								if (resolveContext.missingDependencies) {
+									resolveContext.missingDependencies.add(descriptionFilePath);
+								}
+								return callback();
+							}
+							if (resolveContext.fileDependencies) {
+								resolveContext.fileDependencies.add(descriptionFilePath);
+							}
+							return onJson(err);
+						}
+						if (resolveContext.fileDependencies) {
+							resolveContext.fileDependencies.add(descriptionFilePath);
+						}
+						onJson(null, /** @type {JsonObject} */ (content));
+					});
+				} else {
+					resolver.fileSystem.readFile(descriptionFilePath, (err, content) => {
+						if (err) {
+							if (resolveContext.missingDependencies) {
+								resolveContext.missingDependencies.add(descriptionFilePath);
+							}
+							return callback();
+						}
+						if (resolveContext.fileDependencies) {
+							resolveContext.fileDependencies.add(descriptionFilePath);
+						}
+
+						/** @type {JsonObject | undefined} */
+						let json;
+
+						if (content) {
+							try {
+								json = JSON.parse(content.toString());
+							} catch (/** @type {unknown} */ e) {
+								return onJson(/** @type {Error} */ (e));
+							}
+						} else {
+							return onJson(new Error("No content in file"));
+						}
+
+						onJson(null, json);
+					});
+				}
+
+				/**
+				 * @param {null|Error} [err] error
+				 * @param {JsonObject} [content] content
+				 * @returns {void}
+				 */
+				function onJson(err, content) {
+					if (err) {
+						if (resolveContext.log)
+							resolveContext.log(
+								descriptionFilePath + " (directory description file): " + err
+							);
+						else
+							err.message =
+								descriptionFilePath + " (directory description file): " + err;
+						return callback(err);
+					}
+					callback(null, {
+						content: /** @type {JsonObject} */ (content),
+						directory,
+						path: descriptionFilePath
+					});
+				}
+			},
+			/**
+			 * @param {null|Error} [err] error
+			 * @param {null|Result} [result] result
+			 * @returns {void}
+			 */
+			(err, result) => {
+				if (err) return callback(err);
+				if (result) {
+					return callback(null, result);
+				} else {
+					const dir = cdUp(directory);
+					if (!dir) {
+						return callback();
+					} else {
+						directory = dir;
+						return findDescriptionFile();
+					}
+				}
+			}
+		);
+	})();
+}
+
+/**
+ * @param {JsonObject} content content
+ * @param {string|string[]} field field
+ * @returns {JsonValue | undefined} field data
+ */
+function getField(content, field) {
+	if (!content) return undefined;
+	if (Array.isArray(field)) {
+		/** @type {JsonValue} */
+		let current = content;
+		for (let j = 0; j < field.length; j++) {
+			if (current === null || typeof current !== "object") {
+				current = null;
+				break;
+			}
+			current = /** @type {JsonObject} */ (current)[field[j]];
+		}
+		return current;
+	} else {
+		return content[field];
+	}
+}
+
+/**
+ * @param {string} directory directory
+ * @returns {string|null} parent directory or null
+ */
+function cdUp(directory) {
+	if (directory === "/") return null;
+	const i = directory.lastIndexOf("/"),
+		j = directory.lastIndexOf("\\");
+	const p = i < 0 ? j : j < 0 ? i : i < j ? j : i;
+	if (p < 0) return null;
+	return directory.slice(0, p || 1);
+}
+
+exports.loadDescriptionFile = loadDescriptionFile;
+exports.getField = getField;
+exports.cdUp = cdUp;