Added the ability to export the code coverage data in PHPUnit xml format (#33)

Author: tobiasstadler

c3.php

@@ -56,6 +56,7 @@ class_alias('SebastianBergmann\CodeCoverage\Report\PHP', 'PHP_CodeCoverage_Repor
     class_alias('SebastianBergmann\CodeCoverage\Report\Clover', 'PHP_CodeCoverage_Report_Clover');
     class_alias('SebastianBergmann\CodeCoverage\Report\Crap4j', 'PHP_CodeCoverage_Report_Crap4j');
     class_alias('SebastianBergmann\CodeCoverage\Report\Html\Facade', 'PHP_CodeCoverage_Report_HTML');
+    class_alias('SebastianBergmann\CodeCoverage\Report\Xml\Facade', 'PHP_CodeCoverage_Report_PHPUnit');
     class_alias('SebastianBergmann\CodeCoverage\Exception', 'PHP_CodeCoverage_Exception');
 }
 
@@ -162,6 +163,37 @@ function __c3_build_crap4j_report(PHP_CodeCoverage $codeCoverage, $path)
         return $path . '.crap4j.xml';
     }
 
+    function __c3_build_phpunit_report(PHP_CodeCoverage $codeCoverage, $path)
+    {
+        $writer = new PHP_CodeCoverage_Report_PHPUnit();
+        $writer->process($codeCoverage, $path . 'phpunit');
+
+        if (file_exists($path . '.tar')) {
+            unlink($path . '.tar');
+        }
+
+        $phar = new PharData($path . '.tar');
+        $phar->setSignatureAlgorithm(Phar::SHA1);
+        $files = $phar->buildFromDirectory($path . 'phpunit');
+        array_map('unlink', $files);
+
+        if (in_array('GZ', Phar::getSupportedCompression())) {
+            if (file_exists($path . '.tar.gz')) {
+                unlink($path . '.tar.gz');
+            }
+
+            $phar->compress(\Phar::GZ);
+
+            // close the file so that we can rename it
+            unset($phar);
+
+            unlink($path . '.tar');
+            rename($path . '.tar.gz', $path . '.tar');
+        }
+
+        return $path . '.tar';
+    }
+
     function __c3_send_file($filename)
     {
         if (!headers_sent()) {
@@ -285,6 +317,13 @@ function __c3_clear()
                 __c3_error($e->getMessage());
             }
             return __c3_exit();
+        case 'phpunit':
+            try {
+                __c3_send_file(__c3_build_phpunit_report($codeCoverage, $path));
+            } catch (Exception $e) {
+                __c3_error($e->getMessage());
+            }
+            return __c3_exit();
     }
 
 } else {