get to the example

example_watchexec/.gitignore

@@ -1 +1 @@
-./watched
+watched

example_watchexec/Cargo.toml

@@ -11,7 +11,9 @@ path = "examples/watchexec_async.rs"
 [dependencies]
 anyhow.workspace = true
 chrono.workspace = true
+examples_common = { path = "../examples_common" }
 futures.workspace = true
 tokio.workspace = true
+tracing.workspace = true
 watchexec.workspace = true
 watchexec-signals.workspace = true

example_watchexec/examples/watchexec_async.rs

@@ -6,12 +6,17 @@ use anyhow::Result;
 use chrono::Utc;
 use futures::FutureExt;
 use tokio::sync::Mutex;
+use tracing::Level;
 use watchexec::action::ActionHandler;
 use watchexec::Watchexec;
 
+use examples_common::logging::LogLevelFilter;
+
+const CARGO_CRATE_NAME: &str = env!("CARGO_CRATE_NAME");
 const CARGO_MANIFEST_DIR: &str = env!("CARGO_MANIFEST_DIR");
 const WATCHED_FILE_NAME: &str = "watched";
 
+/// Read/write storage available for use during response to [watchexec] events.
 #[derive(Debug)]
 struct Runtime {
     /// The crate root directory
@@ -30,7 +35,7 @@ impl Runtime {
 
     /// Process an event that occurred in [watchexec].
     pub async fn on_event(&mut self, action: ActionHandler) -> ActionHandler {
-        eprintln!("{ts}: Received event: {:?}", action, ts = Utc::now().to_rfc3339());
+        tracing::info!("Received event: {:?}", action);
 
         action
     }
@@ -43,6 +48,15 @@ struct EventMap {
 
 #[tokio::main]
 async fn main() -> Result<()> {
+    // initialize logging
+    examples_common::logging::init_logging(LogLevelFilter::builder()
+        .global(Level::WARN)
+        .level(CARGO_CRATE_NAME, Level::TRACE)
+        .level(examples_common::CRATE_NAME, Level::DEBUG)
+        .build());
+
+
+    // start work
     let workdir = PathBuf::from(CARGO_MANIFEST_DIR);
     let w = workdir.join(WATCHED_FILE_NAME);
 
@@ -51,7 +65,8 @@ async fn main() -> Result<()> {
         tokio::fs::write(&w, "init").await?;
     }
 
-    eprintln!("{ts}: Starting watchexec...", ts = Utc::now().to_rfc3339());
+    tracing::info!("Starting watchexec");
+    tracing::info!("Modify ./{} to trigger events", PathBuf::from(example_watchexec::CRATE_NAME).join(WATCHED_FILE_NAME).display());
 
     let runtime = Runtime::new(workdir);
 

example_watchexec/src/lib.rs

@@ -0,0 +1,2 @@
+/// Convenience constant for the crate name
+pub const CRATE_NAME: &str = env!("CARGO_CRATE_NAME");