Putting tracing behind a feature (with default on)

s3/Cargo.toml

@@ -63,7 +63,7 @@ hyper-timeout = "0.5"
 # hyper-tls = { version = "0.6", default-features = false }
 rustls = { version = "0.23", default-features = false, features = ["std"] }
 # hyper-native-tls = { version = "0.3", default-features = false }
-tracing = { version="0.1", default-features = false }
+tracing = { version="0.1", default-features = false, optional = true }
 md5 = "0.7"
 percent-encoding = "2"
 serde = { version = "1", features = ["derive"]}
@@ -83,9 +83,10 @@ bytes = { version = "1" }
 strum_macros = "0.26"
 
 [features]
-default = ["fail-on-err"]
+default = ["fail-on-err", "tracing"]
 no-verify-ssl = []
 fail-on-err = []
+tracing = ["dep:tracing"]
 
 [dev-dependencies]
 tokio = { version = "1", features = ["rt", "rt-multi-thread", "macros", "fs"] }

s3/src/request/tokio_backend.rs

@@ -21,6 +21,7 @@ pub use crate::request::tokio_backend::HyperRequest as RequestImpl;
 pub use tokio::io::AsyncWriteExt;
 pub use tokio_stream::Stream;
 
+#[cfg(feature = "tracing")]
 use tracing::{event, span, Level};
 
 use crate::request::request_trait::ResponseDataStream;
@@ -63,6 +64,7 @@ impl<'a> Request for HyperRequest<'a> {
             }
             request.body(Full::from(Bytes::from(self.request_body())))?
         };
+        #[cfg(feature = "tracing")]
         let span = span!(
             Level::DEBUG,
             "rust-s3-async",
@@ -76,9 +78,11 @@ impl<'a> Request for HyperRequest<'a> {
             month = self.datetime.month() as u8,
             year = self.datetime.year()
         );
+        #[cfg(feature = "tracing")]
         let _enter = span.enter();
         let response = client.request(request).await?;
 
+        #[cfg(feature = "tracing")]
         event!(Level::DEBUG, status_code = response.status().as_u16(),);
 
         if cfg!(feature = "fail-on-err") && !response.status().is_success() {