Implemented blueprints https://blueprints.launchpad.net/appy/+spec/gen-create-root-objects, https://blueprints.launchpad.net/appy/+spec/gen-get-flavour and https://blueprints.launchpad.net/appy/+spec/pod-define-variables

shared/utils.py

@@ -46,3 +46,15 @@ class Traceback:
     get = staticmethod(get)
 
 # ------------------------------------------------------------------------------
+def getOsTempFolder():
+    tmp = '/tmp'
+    if os.path.exists(tmp) and os.path.isdir(tmp):
+        res = tmp
+    elif os.environ.has_key('TMP'):
+        res = os.environ['TMP']
+    elif os.environ.has_key('TEMP'):
+        res = os.environ['TEMP']
+    else:
+        raise "Sorry, I can't find a temp folder on your machine."
+    return res
+# ------------------------------------------------------------------------------

shared/xml_parser.py

@@ -85,11 +85,12 @@ class XmlParser(ContentHandler, ErrorHandler):
     '''Basic XML content handler that does things like :
       - remembering the currently parsed element;
       - managing namespace declarations.'''
-    def __init__(self, env, caller=None):
+    def __init__(self, env=None, caller=None):
         '''p_env should be an instance of a class that inherits from
            XmlEnvironment: it specifies the environment to use for this SAX
            parser.'''
         ContentHandler.__init__(self)
+        if not env: env = XmlEnvironment()
         self.env = env
         self.env.parser = self
         self.caller = caller # The class calling this parser