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node_modules/webpack/lib/util/identifier.js

@@ -1,34 +1,71 @@
 "use strict";
 const path = require("path");
 
-const looksLikeAbsolutePath = (maybeAbsolutePath) => {
+/**
+ * @typedef {Object} MakeRelativePathsCache
+ * @property {Map<string, Map<string, string>>=} relativePaths
+ */
+
+/**
+ *
+ * @param {string} maybeAbsolutePath path to check
+ * @returns {boolean} returns true if path is "Absolute Path"-like
+ */
+const looksLikeAbsolutePath = maybeAbsolutePath => {
+	if (/^\/.*\/$/.test(maybeAbsolutePath)) {
+		// this 'path' is actually a regexp generated by dynamic requires.
+		// Don't treat it as an absolute path.
+		return false;
+	}
 	return /^(?:[a-z]:\\|\/)/i.test(maybeAbsolutePath);
 };
 
-const normalizePathSeparator = (p) => p.replace(/\\/g, "/");
+/**
+ *
+ * @param {string} p path to normalize
+ * @returns {string} normalized version of path
+ */
+const normalizePathSeparator = p => p.replace(/\\/g, "/");
 
+/**
+ *
+ * @param {string} context context for relative path
+ * @param {string} identifier identifier for path
+ * @returns {string} a converted relative path
+ */
 const _makePathsRelative = (context, identifier) => {
 	return identifier
 		.split(/([|! ])/)
-		.map(str => looksLikeAbsolutePath(str) ?
-			normalizePathSeparator(path.relative(context, str)) : str)
+		.map(str =>
+			looksLikeAbsolutePath(str)
+				? normalizePathSeparator(path.relative(context, str))
+				: str
+		)
 		.join("");
 };
 
+/**
+ *
+ * @param {string} context context used to create relative path
+ * @param {string} identifier identifier used to create relative path
+ * @param {MakeRelativePathsCache=} cache the cache object being set
+ * @returns {string} the returned relative path
+ */
 exports.makePathsRelative = (context, identifier, cache) => {
-	if(!cache) return _makePathsRelative(context, identifier);
+	if (!cache) return _makePathsRelative(context, identifier);
 
-	const relativePaths = cache.relativePaths || (cache.relativePaths = new Map());
+	const relativePaths =
+		cache.relativePaths || (cache.relativePaths = new Map());
 
 	let cachedResult;
 	let contextCache = relativePaths.get(context);
-	if(typeof contextCache === "undefined") {
-		relativePaths.set(context, contextCache = new Map());
+	if (contextCache === undefined) {
+		relativePaths.set(context, (contextCache = new Map()));
 	} else {
 		cachedResult = contextCache.get(identifier);
 	}
 
-	if(typeof cachedResult !== "undefined") {
+	if (cachedResult !== undefined) {
 		return cachedResult;
 	} else {
 		const relativePath = _makePathsRelative(context, identifier);
@@ -36,3 +73,30 @@ exports.makePathsRelative = (context, identifier, cache) => {
 		return relativePath;
 	}
 };
+
+/**
+ * @param {string} context absolute context path
+ * @param {string} request any request string may containing absolute paths, query string, etc.
+ * @returns {string} a new request string avoiding absolute paths when possible
+ */
+exports.contextify = (context, request) => {
+	return request
+		.split("!")
+		.map(r => {
+			const splitPath = r.split("?", 2);
+			if (/^[a-zA-Z]:\\/.test(splitPath[0])) {
+				splitPath[0] = path.win32.relative(context, splitPath[0]);
+				if (!/^[a-zA-Z]:\\/.test(splitPath[0])) {
+					splitPath[0] = splitPath[0].replace(/\\/g, "/");
+				}
+			}
+			if (/^\//.test(splitPath[0])) {
+				splitPath[0] = path.posix.relative(context, splitPath[0]);
+			}
+			if (!/^(\.\.\/|\/|[a-zA-Z]:\\)/.test(splitPath[0])) {
+				splitPath[0] = "./" + splitPath[0];
+			}
+			return splitPath.join("?");
+		})
+		.join("!");
+};