DNF plugin can be any Python class fullfilling the following criteria:
When DNF CLI runs it loads the plugins found in the paths during the CLI’s initialization.
The base class all DNF plugins must derive from.
Plugin must set this class variable to a string identifying the plugin. The string can only contain alphanumeric characters and underscores.
Plugin must override this. Called immediately after all the plugins are loaded. base is an instance of dnf.Base. cli is an instance of dnf.cli.Cli but can also be None in case DNF is running without a CLI (e.g. from an extension).
Plugin can override this. This hook is called immediately after the CLI/extension is finished configuring DNF. The plugin can use this to tweak the global configuration or the repository configuration.
Plugin can override this. This hook is called immediately after Base.sack is initialized with data from all the enabled repos.
Plugin can override this. This hook is called immediately after a successful transaction.