feat: add clap feature

src/api/notification.rs

@@ -3,6 +3,7 @@ use crate::api::errors::LibnotifyError;
 use super::libnotify::*;
 
 #[derive(Debug, Clone, Copy)]
+#[cfg_attr(feature = "clap", derive(clap::ValueEnum))]
 /// Notification urgency level. Refer to [libnotify docs](https://gnome.pages.gitlab.gnome.org/libnotify/enum.Urgency.html) for more info
 pub enum Urgency {
     /// Low urgency. Used for unimportant notifications
@@ -46,6 +47,7 @@ pub enum HintValue {
 
 /// Notification timeout, until close
 #[derive(Debug, Clone, Copy)]
+#[cfg_attr(feature = "clap", derive(clap::ValueEnum))]
 pub enum Timeout {
     #[allow(missing_docs)]
     Default,

src/lib.rs

@@ -1,12 +1,17 @@
 //! This crate exposes two modules:
 //!
-//! # Api
+//! # Crate structure
+//! ## Api
 //! This module contains a basic wrapper for libnotify calls. It just translates data types, etc,
 //! so usage is basically the same as libnotify.
 //!
-//! # Wrappers
+//! ## Wrappers
 //! This module is a higher level abstraction over api. Recommended to use over api.
 //!
+//! # Features
+//!
+//! - clap – enables [clap] support for `Urgency` and `Timeout` enums
+//!
 #![allow(non_upper_case_globals)]
 #![allow(non_camel_case_types)]
 #![allow(non_snake_case)]