fix for empty css files

Author: sokra

index.js

@@ -9,25 +9,27 @@ module.exports = function(content) {
 	this.cacheable && this.cacheable();
 	var result = [];
 	var tree = csso.parse(content, "stylesheet");
-	if(this && this.minimize) {
+	if(tree && this && this.minimize) {
 		tree = csso.compress(tree);
 		tree = csso.cleanInfo(tree);
 	}
 
-	var imports = extractImports(tree);
-	annotateUrls(tree);
+	if(tree) {
+		var imports = extractImports(tree);
+		annotateUrls(tree);
 
-	imports.forEach(function(imp) {
-		if(imp.media.length > 0) {
-			result.push(JSON.stringify("@media " + imp.media.join("") + "{"));
-		}
-		result.push("require(" + JSON.stringify("!" + __filename + "!" + urlToRequire(imp.url)) + ")");
-		if(imp.media.length > 0) {
-			result.push(JSON.stringify("}"));
-		}
-	});
+		imports.forEach(function(imp) {
+			if(imp.media.length > 0) {
+				result.push(JSON.stringify("@media " + imp.media.join("") + "{"));
+			}
+			result.push("require(" + JSON.stringify("!" + __filename + "!" + urlToRequire(imp.url)) + ")");
+			if(imp.media.length > 0) {
+				result.push(JSON.stringify("}"));
+			}
+		});
+	}
 
-	var css = JSON.stringify(csso.translate(tree));
+	var css = JSON.stringify(tree ? csso.translate(tree) : "");
 	var uriRegExp = /%CSSURL\[%(.*?)%\]CSSURL%/g;
 	css = css.replace(uriRegExp, function(str) {
 		var match = /^%CSSURL\[%(.*?)%\]CSSURL%$/.exec(str);

package.json

@@ -1,6 +1,6 @@
 {
 	"name": "css-loader",
-	"version": "0.6.2",
+	"version": "0.6.3",
 	"author": "Tobias Koppers @sokra",
 	"description": "css loader module for webpack",
 	"dependencies": {

test/urlTest.js

@@ -34,6 +34,10 @@ function testMinimize(name, input, result) {
 }
 
 describe("url", function() {
+	test("empty", "",
+					["\"\""]);
+	testMinimize("empty minimized", "",
+					["\"\""]);
 	test("simple", ".class { a: b c d; }",
 					["\".class { a: b c d; }\""]);
 	test("simple2", ".class { a: b c d; }\n.two {}",