config: Allow a default repo to be specified for patches

Signed-off-by: Paul Barker <pbarker@konsulko.com>
[Jan: style fix]
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

docs/format-changelog.rst

@@ -83,5 +83,6 @@ Added
 ~~~~~
 
 - ``defaults`` key can now be used to set a default value for the repository
-  property ``refspec``. This default value will be used if the appropriate
-  property is not defined for a given repository.
+  property ``refspec`` and the repository patch property ``repo``. These
+  default values will be used if the appropriate properties are not defined
+  for a given repository or patch.

docs/userguide.rst

@@ -326,6 +326,16 @@ Configuration reference
         Sets the default ``refspec`` property applied to all repositories that
         do not override this.
 
+    * ``patches``: dict [optional]
+        This key can contain default values for some repository patch
+        properties. If a default value is set for a patch property it may
+        still be overridden by setting the same property to a different value
+        in a given patch.
+
+      * ``repo``: string [optional]
+          Sets the default ``repo`` property applied to all repository
+          patches that do not override this.
+
 * ``machine``: string [optional]
     Contains the value of the ``MACHINE`` variable that is written into the
     ``local.conf``. Can be overwritten by the ``KAS_MACHINE`` environment

kas/configschema.py

@@ -83,6 +83,15 @@ CONFIGSCHEMA = {
                         'refspec': {
                             'type': 'string',
                         },
+                        'patches': {
+                            'type': 'object',
+                            'additionalProperties': False,
+                            'properties': {
+                                'repo': {
+                                    'type': 'string',
+                                },
+                            },
+                        },
                     },
                 },
             },
@@ -164,7 +173,7 @@ CONFIGSCHEMA = {
                                         {
                                             'type': 'object',
                                             'additionalProperties': False,
-                                            'required': ['repo', 'path'],
+                                            'required': ['path'],
                                             'properties': {
                                                 'repo': {
                                                     'type': 'string'

kas/repos.py

@@ -25,6 +25,7 @@
 
 import re
 import os
+import sys
 import logging
 from urllib.parse import urlparse
 from .context import get_context
@@ -87,15 +88,23 @@ class Repo:
                              str(laydict[x]).lower() not in
                              ['disabled', 'excluded', 'n', 'no', '0', 'false'],
                              layers_dict))
+        default_patch_repo = repo_defaults.get('patches', {}).get('repo', None)
         patches_dict = repo_config.get('patches', {})
-        patches = list(
-            {
+        patches = []
+        for p in sorted(patches_dict):
+            if not patches_dict[p]:
+                continue
+            this_patch = {
                 'id': p,
-                'repo': patches_dict[p]['repo'],
+                'repo': patches_dict[p].get('repo', default_patch_repo),
                 'path': patches_dict[p]['path'],
             }
-            for p in sorted(patches_dict)
-            if patches_dict[p])
+            if this_patch['repo'] is None:
+                logging.error('No repo specified for patch entry "%s" and no '
+                              'default repo specified.', p)
+                sys.exit(1)
+            patches.append(this_patch)
+
         url = repo_config.get('url', None)
         name = repo_config.get('name', name)
         typ = repo_config.get('type', 'git')