improve log path for e2e_utils (bench)

Author: GlenDC

.gitignore

@@ -8,6 +8,3 @@
 # IDEs
 .idea
 .vscode
-
-# log files produced by e2e benchmarks
-e2e-test-logs

benches/e2e_utils.rs

@@ -1,6 +1,6 @@
 use std::{
+    env::temp_dir,
     fs::{create_dir_all, exists, remove_file},
-    path::Path,
 };
 
 use rama::telemetry::tracing::{
@@ -9,17 +9,18 @@ use rama::telemetry::tracing::{
 };
 
 pub fn setup_tracing(test_file: &str) -> appender::non_blocking::WorkerGuard {
-    let e2e_test_dir = "e2e-test-logs";
     let log_file = format!("{test_file}.log");
-    create_dir_all(e2e_test_dir).unwrap();
 
-    println!("Tracing will be piped to {e2e_test_dir}/{log_file}");
-    let log_file_path = Path::new(e2e_test_dir).join(log_file.clone());
+    let log_file_dir_path = temp_dir().join("rama").join("e2e-test-logs");
+    create_dir_all(&log_file_dir_path).unwrap();
+
+    let log_file_path = log_file_dir_path.join(log_file.clone());
+    println!("Tracing will be piped to file {}", log_file_path.display());
     if exists(&log_file_path).unwrap() {
         remove_file(&log_file_path).unwrap();
     }
 
-    let file_appender = appender::rolling::never(e2e_test_dir, log_file);
+    let file_appender = appender::rolling::never(log_file_dir_path, log_file);
     let (non_blocking, _guard) = appender::non_blocking(file_appender);
 
     let file_layer = tracing_subscriber::fmt::layer()