apply defaults to environments

Signed-off-by: Nils Philippsen <nils@redhat.com>

distgit_bugzilla_sync/config.py

@@ -15,6 +15,7 @@
 # code or documentation are not subject to the GNU General Public License and
 # may only be used or replicated with the express permission of Red Hat, Inc.
 
+import copy
 import os
 
 import toml
@@ -146,6 +147,16 @@ def load_configuration(addl_config_file=None, addl_email_overrides_file=None):
     email_overrides.update(system_email_overrides)
     email_overrides.update(addl_email_overrides)
 
+    for env in config['environments'].values():
+        # Fill environments with default data.
+        env_values = copy.deepcopy(config)
+        del env_values['environments']
+
+        # Values specified in the environments should take precedence.
+        env_values.update(env)
+        env.clear()
+        env.update(env_values)
+
 
 config = ConfigDict()
 email_overrides = ConfigDict()