Add eyre example

Cargo.toml

@@ -34,6 +34,7 @@ log = "0.4"
 [dev-dependencies]
 # Error propagation
 anyhow = "1.0"
+eyre = "0.6"
 miette = { version = "4.4", features = ["fancy"] }
 
 # Logging

examples/17_with_eyre.rs

@@ -0,0 +1,28 @@
+//! This example shows how to use this library with eyre instead of anyhow
+
+use env_logger::{Builder, Env};
+use eyre::{eyre, Result};
+use tokio::time::{sleep, Duration};
+use tokio_graceful_shutdown::{SubsystemHandle, Toplevel};
+
+async fn subsys1(_subsys: SubsystemHandle) -> Result<()> {
+    log::info!("Subsystem1 started.");
+    sleep(Duration::from_millis(500)).await;
+    log::info!("Subsystem1 stopped.");
+
+    // Task ends with an error. This should cause the main program to shutdown.
+    Err(eyre!("Subsystem1 threw an error."))
+}
+
+#[tokio::main]
+async fn main() -> Result<()> {
+    // Init logging
+    Builder::from_env(Env::default().default_filter_or("debug")).init();
+
+    // Create toplevel
+    Toplevel::new()
+        .start("Subsys1", subsys1)
+        .catch_signals()
+        .handle_shutdown_requests(Duration::from_millis(1000))
+        .await
+}