Replace dockerize, make settings persistent, let settings be overridden by env vars

transmission/updateSettings.py

@@ -0,0 +1,37 @@
+import os
+import sys
+import json
+
+
+# Verify script arguments
+if len(sys.argv) != 3:
+    sys.exit('Invalid number of arguments. Usage:\n updateSettings.py defaultSettingsFile.json outputSettingsFile.json')
+
+default_settings = sys.argv[1]
+transmission_settings = sys.argv[2]
+
+if not os.path.isfile(default_settings):
+    sys.exit('Invalid arguments, default settings file does not exist')
+
+# Define which file to base the config on
+if os.path.isfile(transmission_settings):
+    configuration_baseline=transmission_settings
+else:
+    configuration_baseline=default_settings
+
+print('Using config baseline ' + configuration_baseline)
+
+# Read config base
+with open(configuration_baseline, 'r') as f:
+    settings_dict = json.load(f)
+
+# For each setting, check if an environment variable is set to override it
+for setting in settings_dict:
+    setting_env_name = 'TRANSMISSION_' + setting.upper().replace('-', '_')
+    if setting_env_name in os.environ:
+        print('Overriding ' + setting + ' because ' + setting_env_name + ' is set to ' + os.environ.get(setting_env_name))
+        settings_dict[setting] = os.environ.get(setting_env_name)
+
+# Dump resulting settings to file
+with open(transmission_settings, 'w') as fp:
+    json.dump(settings_dict, fp)