Fixed `yii\console\controllers\AssetController` breaks CSS URLs on Windows

framework/CHANGELOG.md

@@ -4,6 +4,7 @@ Yii Framework 2 Change Log
 2.0.0 under development
 -----------------------
 
+- Bug #4881: Fixed `yii\console\controllers\AssetController` breaks CSS URLs on Windows (klimov-paul)
 - Bug #5171: Fixed the bug that ActiveForm + Pjax submit event is only triggered once (qiangxue)
 - Bug #5252: Null values are not properly handled by `RangeValidator` (githubjeka, qiangxue)
 - Bug #5260: `yii\i18n\Formatter::decimalSeparator` and `yii\i18n\Formatter::thousandSeparator` where not configurable when intl is not installed (execut, cebe)

framework/console/controllers/AssetController.php

@@ -513,7 +513,7 @@ EOD;
         $content = '';
         foreach ($inputFiles as $file) {
             $content .= "/*** BEGIN FILE: $file ***/\n"
-                . $this->adjustCssUrl(file_get_contents($file), dirname($file), dirname($outputFile))
+                . $this->adjustCssUrl(file_get_contents($file), dirname(realpath($file)), dirname(realpath($outputFile)))
                 . "/*** END FILE: $file ***/\n";
         }
         if (!file_put_contents($outputFile, $content)) {
@@ -530,6 +530,9 @@ EOD;
      */
     protected function adjustCssUrl($cssContent, $inputFilePath, $outputFilePath)
     {
+        $inputFilePath = str_replace('\\', '/', $inputFilePath);
+        $outputFilePath = str_replace('\\', '/', $outputFilePath);
+
         $sharedPathParts = [];
         $inputFilePathParts = explode('/', $inputFilePath);
         $inputFilePathPartsCount = count($inputFilePathParts);

tests/unit/framework/console/controllers/AssetControllerTest.php

@@ -368,6 +368,12 @@ EOL;
                 src: url(data:application/x-font-ttf;charset=utf-8;base64,AAEAAAALAIAAAwAwT==) format('truetype');
                 }",
             ],
+            [
+                '.published-same-dir-class {background-image: url(published_same_dir.png);}',
+                'C:\test\base\path\assets\input',
+                'C:\test\base\path\assets\output',
+                '.published-same-dir-class {background-image: url(../input/published_same_dir.png);}',
+            ],
         ];
     }