chushihua

node_modules/webpack/lib/util/identifier.js

@@ -0,0 +1,38 @@
+"use strict";
+const path = require("path");
+
+const looksLikeAbsolutePath = (maybeAbsolutePath) => {
+	return /^(?:[a-z]:\\|\/)/i.test(maybeAbsolutePath);
+};
+
+const normalizePathSeparator = (p) => p.replace(/\\/g, "/");
+
+const _makePathsRelative = (context, identifier) => {
+	return identifier
+		.split(/([|! ])/)
+		.map(str => looksLikeAbsolutePath(str) ?
+			normalizePathSeparator(path.relative(context, str)) : str)
+		.join("");
+};
+
+exports.makePathsRelative = (context, identifier, cache) => {
+	if(!cache) return _makePathsRelative(context, identifier);
+
+	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());
+	} else {
+		cachedResult = contextCache.get(identifier);
+	}
+
+	if(typeof cachedResult !== "undefined") {
+		return cachedResult;
+	} else {
+		const relativePath = _makePathsRelative(context, identifier);
+		contextCache.set(identifier, relativePath);
+		return relativePath;
+	}
+};