2 files changed, 90 insertions, 8 deletions
diff --git a/cloudinit/reporting/__init__.py b/cloudinit/reporting/__init__.py
index b0364eec..78dde715 100644
--- a/cloudinit/reporting/__init__.py
+++ b/cloudinit/reporting/__init__.py
@@ -22,6 +22,15 @@ DEFAULT_CONFIG = {
 
 instantiated_handler_registry = DictRegistry()
 
+class _nameset(set):
+    def __getattr__(self, name):
+        if name in self:
+            return name
+        raise AttributeError("%s not a valid value" % name)
+
+
+status = _nameset(("SUCCESS", "WARN", "FAIL"))
+
 
 class ReportingEvent(object):
     """Encapsulation of event formatting."""
@@ -39,17 +48,16 @@ class ReportingEvent(object):
 
 class FinishReportingEvent(ReportingEvent):
 
-    def __init__(self, name, description, successful=None):
+    def __init__(self, name, description, result=status.SUCCESS):
         super(FinishReportingEvent, self).__init__(
             FINISH_EVENT_TYPE, name, description)
-        self.successful = successful
+        self.result = result
+        if result not in status:
+            raise ValueError("Invalid result: %s" % result)
 
     def as_string(self):
-        if self.successful is None:
-            return super(FinishReportingEvent, self).as_string()
-        success_string = 'success' if self.successful else 'fail'
         return '{0}: {1}: {2}: {3}'.format(
-            self.event_type, self.name, success_string, self.description)
+            self.event_type, self.name, self.result, self.description)
 
 
 def add_configuration(config):
@@ -74,12 +82,13 @@ def report_event(event):
         handler.publish_event(event)
 
 
-def report_finish_event(event_name, event_description, successful=None):
+def report_finish_event(event_name, event_description,
+                        result=status.SUCCESS):
     """Report a "finish" event.
 
     See :py:func:`.report_event` for parameter details.
     """
-    event = FinishReportingEvent(event_name, event_description, successful)
+    event = FinishReportingEvent(event_name, event_description, result)
     return report_event(event)
 
 
@@ -97,4 +106,70 @@ def report_start_event(event_name, event_description):
     return report_event(event)
 
 
+class ReportEventStack(object):
+    def __init__(self, name, description, message=None, parent=None,
+                 reporting_enabled=None, result_on_exception=status.FAIL):
+        self.parent = parent
+        self.name = name
+        self.description = description
+        self.message = message
+        self.result_on_exception = result_on_exception
+        self.result = status.SUCCESS
+
+        # use parents reporting value if not provided
+        if reporting_enabled is None:
+            if parent:
+                reporting_enabled = parent.reporting_enabled
+            else:
+                reporting_enabled = True
+        self.reporting_enabled = reporting_enabled
+
+        if parent:
+            self.fullname = '/'.join((parent.fullname, name,))
+        else:
+            self.fullname = self.name
+        self.children = {}
+
+    def __repr__(self):
+        return ("%s reporting=%s" % (self.fullname, self.reporting_enabled))
+
+    def __enter__(self):
+        self.result = status.SUCCESS
+        if self.reporting_enabled:
+            report_start_event(self.fullname, self.description)
+        if self.parent:
+            self.parent.children[self.name] = (None, None)
+        return self
+
+    def childrens_finish_info(self):
+        for cand_result in (status.FAIL, status.WARN):
+            for name, (value, msg) in self.children.items():
+                if value == cand_result:
+                    return (value, "[" + name + "]" + msg)
+        return (self.result, self.message)
+
+    @property
+    def message(self):
+        if self._message is not None:
+            return self._message
+        return self.description
+
+    @message.setter
+    def message(self, value):
+        self._message = value
+       
+    def finish_info(self, exc):
+        # return tuple of description, and value
+        if exc:
+            return (self.result_on_exception, self.message)
+        return self.childrens_finish_info()
+
+    def __exit__(self, exc_type, exc_value, traceback):
+        (result, msg) = self.finish_info(exc_value)
+        if self.parent:
+            self.parent.children[self.name] = (result, msg)
+        if self.reporting_enabled:
+            report_finish_event(self.fullname, msg, result)
+
+
 add_configuration(DEFAULT_CONFIG)
diff --git a/cloudinit/reporting/handlers.py b/cloudinit/reporting/handlers.py
index be323f53..1d5ca524 100644
--- a/cloudinit/reporting/handlers.py
+++ b/cloudinit/reporting/handlers.py
@@ -21,5 +21,12 @@ class LogHandler(ReportingHandler):
         logger.info(event.as_string())
 
 
+class StderrHandler(ReportingHandler):
+    def publish_event(self, event):
+        #sys.stderr.write(event.as_string() + "\n")
+        print(event.as_string())
+
+
 available_handlers = DictRegistry()
 available_handlers.register_item('log', LogHandler)
+available_handlers.register_item('print', StderrHandler)