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1 files changed, 221 insertions, 0 deletions

diff --git a/node_modules/enhanced-resolve/lib/util/path.js b/node_modules/enhanced-resolve/lib/util/path.js
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+++ b/node_modules/enhanced-resolve/lib/util/path.js
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+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+
+"use strict";
+
+const path = require("path");
+
+const CHAR_HASH = "#".charCodeAt(0);
+const CHAR_SLASH = "/".charCodeAt(0);
+const CHAR_BACKSLASH = "\\".charCodeAt(0);
+const CHAR_A = "A".charCodeAt(0);
+const CHAR_Z = "Z".charCodeAt(0);
+const CHAR_LOWER_A = "a".charCodeAt(0);
+const CHAR_LOWER_Z = "z".charCodeAt(0);
+const CHAR_DOT = ".".charCodeAt(0);
+const CHAR_COLON = ":".charCodeAt(0);
+
+const posixNormalize = path.posix.normalize;
+const winNormalize = path.win32.normalize;
+
+/**
+ * @enum {number}
+ */
+const PathType = Object.freeze({
+	Empty: 0,
+	Normal: 1,
+	Relative: 2,
+	AbsoluteWin: 3,
+	AbsolutePosix: 4,
+	Internal: 5
+});
+exports.PathType = PathType;
+
+/**
+ * @param {string} p a path
+ * @returns {PathType} type of path
+ */
+const getType = p => {
+	switch (p.length) {
+		case 0:
+			return PathType.Empty;
+		case 1: {
+			const c0 = p.charCodeAt(0);
+			switch (c0) {
+				case CHAR_DOT:
+					return PathType.Relative;
+				case CHAR_SLASH:
+					return PathType.AbsolutePosix;
+				case CHAR_HASH:
+					return PathType.Internal;
+			}
+			return PathType.Normal;
+		}
+		case 2: {
+			const c0 = p.charCodeAt(0);
+			switch (c0) {
+				case CHAR_DOT: {
+					const c1 = p.charCodeAt(1);
+					switch (c1) {
+						case CHAR_DOT:
+						case CHAR_SLASH:
+							return PathType.Relative;
+					}
+					return PathType.Normal;
+				}
+				case CHAR_SLASH:
+					return PathType.AbsolutePosix;
+				case CHAR_HASH:
+					return PathType.Internal;
+			}
+			const c1 = p.charCodeAt(1);
+			if (c1 === CHAR_COLON) {
+				if (
+					(c0 >= CHAR_A && c0 <= CHAR_Z) ||
+					(c0 >= CHAR_LOWER_A && c0 <= CHAR_LOWER_Z)
+				) {
+					return PathType.AbsoluteWin;
+				}
+			}
+			return PathType.Normal;
+		}
+	}
+	const c0 = p.charCodeAt(0);
+	switch (c0) {
+		case CHAR_DOT: {
+			const c1 = p.charCodeAt(1);
+			switch (c1) {
+				case CHAR_SLASH:
+					return PathType.Relative;
+				case CHAR_DOT: {
+					const c2 = p.charCodeAt(2);
+					if (c2 === CHAR_SLASH) return PathType.Relative;
+					return PathType.Normal;
+				}
+			}
+			return PathType.Normal;
+		}
+		case CHAR_SLASH:
+			return PathType.AbsolutePosix;
+		case CHAR_HASH:
+			return PathType.Internal;
+	}
+	const c1 = p.charCodeAt(1);
+	if (c1 === CHAR_COLON) {
+		const c2 = p.charCodeAt(2);
+		if (
+			(c2 === CHAR_BACKSLASH || c2 === CHAR_SLASH) &&
+			((c0 >= CHAR_A && c0 <= CHAR_Z) ||
+				(c0 >= CHAR_LOWER_A && c0 <= CHAR_LOWER_Z))
+		) {
+			return PathType.AbsoluteWin;
+		}
+	}
+	return PathType.Normal;
+};
+exports.getType = getType;
+
+/**
+ * @param {string} p a path
+ * @returns {string} the normalized path
+ */
+const normalize = p => {
+	switch (getType(p)) {
+		case PathType.Empty:
+			return p;
+		case PathType.AbsoluteWin:
+			return winNormalize(p);
+		case PathType.Relative: {
+			const r = posixNormalize(p);
+			return getType(r) === PathType.Relative ? r : `./${r}`;
+		}
+	}
+	return posixNormalize(p);
+};
+exports.normalize = normalize;
+
+/**
+ * @param {string} rootPath the root path
+ * @param {string | undefined} request the request path
+ * @returns {string} the joined path
+ */
+const join = (rootPath, request) => {
+	if (!request) return normalize(rootPath);
+	const requestType = getType(request);
+	switch (requestType) {
+		case PathType.AbsolutePosix:
+			return posixNormalize(request);
+		case PathType.AbsoluteWin:
+			return winNormalize(request);
+	}
+	switch (getType(rootPath)) {
+		case PathType.Normal:
+		case PathType.Relative:
+		case PathType.AbsolutePosix:
+			return posixNormalize(`${rootPath}/${request}`);
+		case PathType.AbsoluteWin:
+			return winNormalize(`${rootPath}\\${request}`);
+	}
+	switch (requestType) {
+		case PathType.Empty:
+			return rootPath;
+		case PathType.Relative: {
+			const r = posixNormalize(rootPath);
+			return getType(r) === PathType.Relative ? r : `./${r}`;
+		}
+	}
+	return posixNormalize(rootPath);
+};
+exports.join = join;
+
+const joinCache = new Map();
+
+/**
+ * @param {string} rootPath the root path
+ * @param {string | undefined} request the request path
+ * @returns {string} the joined path
+ */
+const cachedJoin = (rootPath, request) => {
+	let cacheEntry;
+	let cache = joinCache.get(rootPath);
+	if (cache === undefined) {
+		joinCache.set(rootPath, (cache = new Map()));
+	} else {
+		cacheEntry = cache.get(request);
+		if (cacheEntry !== undefined) return cacheEntry;
+	}
+	cacheEntry = join(rootPath, request);
+	cache.set(request, cacheEntry);
+	return cacheEntry;
+};
+exports.cachedJoin = cachedJoin;
+
+const checkExportsFieldTarget = relativePath => {
+	let lastNonSlashIndex = 2;
+	let slashIndex = relativePath.indexOf("/", 2);
+	let cd = 0;
+
+	while (slashIndex !== -1) {
+		const folder = relativePath.slice(lastNonSlashIndex, slashIndex);
+
+		switch (folder) {
+			case "..": {
+				cd--;
+				if (cd < 0)
+					return new Error(
+						`Trying to access out of package scope. Requesting ${relativePath}`
+					);
+				break;
+			}
+			default:
+				cd++;
+				break;
+		}
+
+		lastNonSlashIndex = slashIndex + 1;
+		slashIndex = relativePath.indexOf("/", lastNonSlashIndex);
+	}
+};
+exports.checkExportsFieldTarget = checkExportsFieldTarget;