added check for ZipArchive availability

codepot/etc/codepot.ini.in

@@ -199,7 +199,6 @@ allow_set_time_limit = "no"
 ;------------------------------------------------------------------------------
 signin_for_code_search = "yes"
 
-
 ;------------------------------------------------------------------------------
 ; customized footer
 ;------------------------------------------------------------------------------

codepot/src/codepot/helpers/codepot_helper.php

@@ -151,9 +151,10 @@ if ( !function_exists ('codepot_zip_dir'))
 	// $exclude: file names to exclude. string or array of strings
 	function codepot_zip_dir ($output_file, $path, $local_path = NULL, $exclude = NULL)
 	{
-		$stack = array ();
-
 		if (!is_dir($path)) return FALSE;
+		if (!class_exists('ZipArchive')) return FALSE;
+
+		$stack = array ();
 
 		array_push ($stack, $path); 
 		$prefix = strlen($path);

codepot/src/codepot/models/subversionmodel.php

@@ -1042,7 +1042,6 @@ class SubversionModel extends Model
 			return FALSE;
 		}
 
-		//exec ("zip {$tfname}.zip -r {$actual_tfname}");
 		if (codepot_zip_dir ("{$tfname}.zip", $actual_tfname, $topdir, array('.svn')) === FALSE) 
 		{
 			codepot_delete_files ($actual_tfname, TRUE);