chore:(logging): improve debug logs with -vv (#8867)

Author: mehulkar

crates/turborepo-lib/src/engine/execute.rs

@@ -116,7 +116,9 @@ impl Engine {
 
                 if let Err(StopExecution) = result.await.unwrap_or_else(|_| {
                     // If the visitor doesn't send a callback, then we assume the task finished
-                    debug!("Engine visitor dropped callback sender without sending result");
+                    tracing::trace!(
+                        "Engine visitor dropped callback sender without sending result"
+                    );
                     Ok(())
                 }) {
                     if walker

crates/turborepo-lib/src/task_hash.rs

@@ -366,12 +366,14 @@ impl<'a> TaskHasher<'a> {
         let external_deps_hash =
             is_monorepo.then(|| get_external_deps_hash(&workspace.transitive_dependencies));
 
-        debug!(
-            "task hash env vars for {}:{}\n vars: {:?}",
-            task_id.package(),
-            task_id.task(),
-            hashable_env_pairs
-        );
+        if !hashable_env_pairs.is_empty() {
+            debug!(
+                "task hash env vars for {}:{}\n vars: {:?}",
+                task_id.package(),
+                task_id.task(),
+                hashable_env_pairs
+            );
+        }
 
         let package_dir = workspace.package_path().to_unix();
         let is_root_package = package_dir.is_empty();

crates/turborepo-telemetry/src/lib.rs

@@ -21,7 +21,7 @@ use tokio::{
     sync::{mpsc, oneshot},
     task::{JoinError, JoinHandle},
 };
-use tracing::{debug, error};
+use tracing::{debug, error, trace};
 use turborepo_api_client::telemetry;
 use turborepo_ui::{color, BOLD, GREY, UI};
 use uuid::Uuid;
@@ -203,15 +203,15 @@ impl<C: telemetry::TelemetryClient + Clone + Send + Sync + 'static> Worker<C> {
     pub fn flush_events(&mut self) {
         if !self.buffer.is_empty() {
             let events = std::mem::take(&mut self.buffer);
-            debug!(
-                "Starting telemetry event queue flush (num_events={:?})",
-                events.len()
-            );
+            let num_events = events.len();
             let handle = self.send_events(events);
             if let Some(handle) = handle {
                 self.senders.push(handle);
             }
-            debug!("Done telemetry event queue flush");
+            trace!(
+                "Flushed telemetry event queue (num_events={:?})",
+                num_events
+            );
         }
     }