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node_modules/webpack/lib/sharing/utils.js

@@ -0,0 +1,90 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const { join, dirname, readJson } = require("../util/fs");
+
+/** @typedef {import("../util/fs").InputFileSystem} InputFileSystem */
+
+/**
+ * @param {string} str maybe required version
+ * @returns {boolean} true, if it looks like a version
+ */
+exports.isRequiredVersion = str => {
+	return /^([\d^=v<>~]|[*xX]$)/.test(str);
+};
+
+/**
+ *
+ * @param {InputFileSystem} fs file system
+ * @param {string} directory directory to start looking into
+ * @param {string[]} descriptionFiles possible description filenames
+ * @param {function((Error | null)=, {data: object, path: string}=): void} callback callback
+ */
+const getDescriptionFile = (fs, directory, descriptionFiles, callback) => {
+	let i = 0;
+	const tryLoadCurrent = () => {
+		if (i >= descriptionFiles.length) {
+			const parentDirectory = dirname(fs, directory);
+			if (!parentDirectory || parentDirectory === directory) return callback();
+			return getDescriptionFile(
+				fs,
+				parentDirectory,
+				descriptionFiles,
+				callback
+			);
+		}
+		const filePath = join(fs, directory, descriptionFiles[i]);
+		readJson(fs, filePath, (err, data) => {
+			if (err) {
+				if ("code" in err && err.code === "ENOENT") {
+					i++;
+					return tryLoadCurrent();
+				}
+				return callback(err);
+			}
+			if (!data || typeof data !== "object" || Array.isArray(data)) {
+				return callback(
+					new Error(`Description file ${filePath} is not an object`)
+				);
+			}
+			callback(null, { data, path: filePath });
+		});
+	};
+	tryLoadCurrent();
+};
+exports.getDescriptionFile = getDescriptionFile;
+
+exports.getRequiredVersionFromDescriptionFile = (data, packageName) => {
+	if (
+		data.optionalDependencies &&
+		typeof data.optionalDependencies === "object" &&
+		packageName in data.optionalDependencies
+	) {
+		return data.optionalDependencies[packageName];
+	}
+	if (
+		data.dependencies &&
+		typeof data.dependencies === "object" &&
+		packageName in data.dependencies
+	) {
+		return data.dependencies[packageName];
+	}
+	if (
+		data.peerDependencies &&
+		typeof data.peerDependencies === "object" &&
+		packageName in data.peerDependencies
+	) {
+		return data.peerDependencies[packageName];
+	}
+	if (
+		data.devDependencies &&
+		typeof data.devDependencies === "object" &&
+		packageName in data.devDependencies
+	) {
+		return data.devDependencies[packageName];
+	}
+};