Use internal stdout and stderr objects for logging

Inside cli modules, use internal stdout and stderr objects rather than
writing directly to the PHP outputs. This will allow for significantly
easier regression testing integration.

setup/cli/modules/class.module.php

@@ -80,6 +80,21 @@ class Option {
     }
 }
 
+class OutputStream {
+    var $stream;
+
+    function OutputStream() {
+        call_user_func_array(array($this, '__construct'), func_get_args());
+    }
+    function __construct($stream) {
+        $this->stream = fopen($stream, 'w');
+    }
+
+    function write($what) {
+        fwrite($this->stream, $what);
+    }
+}
+
 class Module {
 
     var $options = array();
@@ -89,6 +104,9 @@ class Module {
     var $usage = '$script [options] $args [arguments]';
     var $autohelp = true;
 
+    var $stdout;
+    var $stderr;
+
     var $_options;
     var $_args;
 
@@ -102,6 +120,8 @@ class Module {
             'help'=>"Display this help message");
         foreach ($this->options as &$opt)
             $opt = new Option($opt);
+        $this->stdout = new OutputStream('php://output');
+        $this->stderr = new OutputStream('php://stderr');
     }
 
     function showHelp() {