[entropy.server] add server-side support for per-repository package keywords file

libraries/entropy/server/interfaces/main.py

@@ -2631,6 +2631,12 @@ class Server(Singleton, TextInterface):
         return os.path.join(self.get_local_database_dir(repo, branch),
             etpConst['etpdatabasecriticalfile'])
 
+    def get_local_database_keywords_file(self, repo = None, branch = None):
+        if repo == None:
+            repo = self.default_repository
+        return os.path.join(self.get_local_database_dir(repo, branch),
+            etpConst['etpdatabasekeywordsfile'])
+
     def get_local_database_dir(self, repo = None, branch = None):
         srv_set = self.SystemSettings[self.sys_settings_plugin_id]['server']
         if repo == None:

libraries/entropy/server/interfaces/mirrors.py

@@ -1227,6 +1227,14 @@ class Server:
             if not download:
                 critical.append(data['critical_updates_file'])
 
+        keywords_file = self.Entropy.get_local_database_keywords_file(
+            repo)
+        if os.path.isfile(keywords_file) or download:
+            data['keywords_file'] = keywords_file
+            extra_text_files.append(data['keywords_file'])
+            if not download:
+                critical.append(data['keywords_file'])
+
         # EAPI 2,3
         if not download: # we don't need to get the dump