show the function producing each validation warning or error

Include the name of the function in addition to the actual warning or
error so that it is easier to debug failures.

Change-Id: I8e2788cc1f07c310dccde7e05db74f0e133ca04a
Signed-off-by: Doug Hellmann <doug@doughellmann.com>

openstack_releases/cmds/validate.py

@@ -1438,6 +1438,7 @@ class ValidationContext(object):
         self.cleanup = cleanup
         self.filename = None
         self._setup_workdir()
+        self.function_name = 'unknown'
 
     def _setup_workdir(self):
         workdir = tempfile.mkdtemp(prefix='releases-')
@@ -1455,13 +1456,18 @@ class ValidationContext(object):
     def set_filename(self, filename):
         self.filename = filename
 
+    def set_function(self, function):
+        self.function_name = function.__name__
+
     def warning(self, msg):
         LOG.warning(msg)
-        self.warnings.append('{}: {}'.format(self.filename, msg))
+        self.warnings.append('{}: {}: {}'.format(
+            self.filename, self.function_name, msg))
 
     def error(self, msg):
         LOG.error(msg)
-        self.errors.append('{}: {}'.format(self.filename, msg))
+        self.errors.append('{}: {}: {}'.format(
+            self.filename, self.function_name, msg))
         if self.debug:
             raise RuntimeError(msg)
 
@@ -1577,6 +1583,7 @@ def main():
         for check in checks:
             title = inspect.getdoc(check).splitlines()[0].strip()
             header(title)
+            context.set_function(check)
             check(deliv, context)
 
     context.show_summary()