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CONFIGURATION_MANAGEMENT.md

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Configuration Management

This documentation provides a comprehensive solution for integrating and managing configuration files in OpenEdx iOS project.

Features

  • Build Phase Script Integration: Adds a script to the Build Phase of Xcode. It calls the Xcode build phase run script, which takes care of the virtual environment and installing dependencies and executes a Python script process_config.py with $CONFIGURATION and scheme_mappings argument.
  • Python Script for Configuration: Utilizes process_config.py for:
    • Adding essential keys to Info.plist (e.g., Facebook, Microsoft keys).
    • Creating GoogleServices.plist with Firebase keys.
    • Generating config.plist from ios.yaml and shared.yaml.

Inside Config.swift, parsing and populating relevant keys and classes are done, e.g. AgreementConfig.swift and FirebaseConfig.swift.

Getting Started

Configuration Setup

Edit a config_settings.yaml in the default_config folder. It should contain data as follows:

config_directory: '{path_to_config_folder}'
config_mapping:
  prod: 'prod'
  stage: 'stage'
  dev: 'dev'
# These mappings are configurable, e.g. dev: 'prod_test'
  • config_directory provides the path of the config directory.
  • config_mappings provides mappings that can be utilized to map the Xcode build scheme to a defined folder within the config directory, and it will be referenced.

Configuration Files

Two main configuration files are used: ios.yaml and shared.yaml, placed under the folder defined in config_mappings. Additionally, a mappings.yaml file is required in the same directory, specifying the YAML files to be processed. Its structure is as follows:

ios:
    files:
      - {file_one.yaml}
      - {file_two.yaml}
  • ios.yaml will contain config data specific to iOS, e.g., Firebase keys, Facebook keys, etc.
  • shared.yaml will contain config data that is shared, e.g., API_HOST_URL, OAUTH_CLIENT_ID, TOKEN_TYPE, etc.

Future Support

  • To add config related to some other service, create a class, e.g. ServiceNameConfig.swift, to be able to populate related fields.
  • Create an extension to Config.swift to be able to add the newly created service as a variable to the main Config.
  • If needed, make a protocol to be referenced inside the scope of ConfigProtocol so that the config is available using ConfigProtocol service.

Example:

private let key = "KEY"
extension Config {
    public var serviceNameConfig: ServiceNameConfig {
        return ServiceNameConfig(dictionary: self[key] as? [String: AnyObject] ?? [:])
    }
}

Note

If Firebase Configuration is provided the updated FirebaseCrashlytics build phase script extracts googleAppID from the newly generated GoogleService-Info.plist and runs the Crashlytics script with the provifing id.

Examples of Config Files

ios.yaml:

OAUTH_CLIENT_ID: ''

FIREBASE:
  ENABLED: true
  API_KEY: "testApiKey"
  BUNDLE_ID: "testBundleID"
  CLIENT_ID: "testClientID"
  DATABASE_URL: "https://test.database.url"
  GCM_SENDER_ID: "testGCMSenderID"
  GOOGLE_APP_ID: "testGoogleAppID"
  PROJECT_ID: "testProjectID"
  REVERSED_CLIENT_ID: "testReversedClientID"
  STORAGE_BUCKET: "testStorageBucket"
  ANALYTICS_SOURCE: "firebase"

MICROSOFT:
  ENABLED: true
  APP_ID: "microsoftAppID"

shared.yaml:

API_HOST_URL: "https://www.example.com"
FEEDBACK_EMAIL_ADDRESS: "example@mail.com"
TOKEN_TYPE: "JWT"

AGREEMENT_URLS:
  PRIVACY_POLICY_URL: "https://www.example.com/privacy"
  TOS_URL: "https://www.example.com/tos"

# Features
WHATS_NEW_ENABLED: false

The default_config directory is added to the project to provide an idea of how to write config YAML files.