Updated the init process to get the branch from package_info in docker images

bazarr/init.py

@@ -92,7 +92,29 @@ with open(os.path.join(args.config_dir, 'config', 'config.ini'), 'w+') as handle
 # migrate enabled_providers from comma separated string to list
 if isinstance(settings.general.enabled_providers, str) and not settings.general.enabled_providers.startswith('['):
     settings.general.enabled_providers = str(settings.general.enabled_providers.split(","))
-with open(os.path.join(args.config_dir, 'config', 'config.ini'), 'w+') as handle:
+    with open(os.path.join(args.config_dir, 'config', 'config.ini'), 'w+') as handle:
+        settings.write(handle)
+
+# make sure settings.general.branch is properly set when running inside a docker container
+package_info_file = os.path.join(os.path.dirname(os.path.dirname(__file__)), 'package_info')
+if os.path.isfile(package_info_file):
+    try:
+        package_info = {}
+        with open(package_info_file) as file:
+            for line in file.readlines():
+                if line == '\n':
+                    break
+                splitted_line = line.split('=')
+                if len(splitted_line) == 2:
+                    package_info[splitted_line[0].lower()] = splitted_line[1].replace('\n', '')
+                else:
+                    continue
+        if 'branch' in package_info:
+            settings.general.branch = package_info['branch']
+    except:
+        pass
+    else:
+        with open(os.path.join(args.config_dir, 'config', 'config.ini'), 'w+') as handle:
             settings.write(handle)
 
 # create database file