refactor(lib): Import tracing macros per-module

Instead of one #[macro_use] at the crate root.

src/body/length.rs

@@ -50,6 +50,8 @@ impl DecodedLength {
     /// Checks the `u64` is within the maximum allowed for content-length.
     #[cfg(any(feature = "http1", feature = "http2"))]
     pub(crate) fn checked_new(len: u64) -> Result<Self, crate::error::Parse> {
+        use tracing::warn;
+
         if len <= MAX_LEN {
             Ok(DecodedLength(len))
         } else {

src/client/client.rs

@@ -8,6 +8,7 @@ use futures_util::future::{self, Either, FutureExt as _, TryFutureExt as _};
 use http::header::{HeaderValue, HOST};
 use http::uri::{Port, Scheme};
 use http::{Method, Request, Response, Uri, Version};
+use tracing::{debug, trace, warn};
 
 use super::conn;
 use super::connect::{self, sealed::Connect, Alpn, Connected, Connection};

src/client/conn.rs

@@ -60,6 +60,7 @@ use httparse::ParserConfig;
 use pin_project_lite::pin_project;
 use tokio::io::{AsyncRead, AsyncWrite};
 use tower_service::Service;
+use tracing::{debug, trace};
 
 use super::dispatch;
 use crate::body::HttpBody;

src/client/connect/dns.rs

@@ -31,6 +31,7 @@ use std::{fmt, io, vec};
 
 use tokio::task::JoinHandle;
 use tower_service::Service;
+use tracing::debug;
 
 pub(super) use self::sealed::Resolve;
 

src/client/connect/http.rs

@@ -14,6 +14,7 @@ use http::uri::{Scheme, Uri};
 use pin_project_lite::pin_project;
 use tokio::net::{TcpSocket, TcpStream};
 use tokio::time::Sleep;
+use tracing::{debug, trace, warn};
 
 use super::dns::{self, resolve, GaiResolver, Resolve};
 use super::{Connected, Connection};

src/client/dispatch.rs

@@ -235,6 +235,7 @@ impl<T, U> Callback<T, U> {
         mut when: impl Future<Output = Result<U, (crate::Error, Option<T>)>> + Unpin,
     ) {
         use futures_util::future;
+        use tracing::trace;
 
         let mut cb = Some(self);
 

src/client/pool.rs

@@ -10,6 +10,7 @@ use std::time::{Duration, Instant};
 use futures_channel::oneshot;
 #[cfg(feature = "runtime")]
 use tokio::time::{Duration, Instant, Interval};
+use tracing::{debug, trace};
 
 use super::client::Ver;
 use crate::common::{exec::Exec, task, Future, Pin, Poll, Unpin};

src/client/service.rs

@@ -6,6 +6,8 @@ use std::error::Error as StdError;
 use std::future::Future;
 use std::marker::PhantomData;
 
+use tracing::debug;
+
 use super::conn::{Builder, SendRequest};
 use crate::{
     body::HttpBody,

src/lib.rs

@@ -58,13 +58,6 @@
 
 #[doc(hidden)]
 pub use http;
-#[cfg(any(
-    feature = "http1",
-    feature = "http2",
-    all(feature = "client", feature = "tcp")
-))]
-#[macro_use]
-extern crate tracing;
 
 #[cfg(all(test, feature = "nightly"))]
 extern crate test;

src/proto/h1/conn.rs

@@ -7,6 +7,7 @@ use http::header::{HeaderValue, CONNECTION};
 use http::{HeaderMap, Method, Version};
 use httparse::ParserConfig;
 use tokio::io::{AsyncRead, AsyncWrite};
+use tracing::{debug, error, trace};
 
 use super::io::Buffered;
 use super::{Decoder, Encode, EncodedBuf, Encoder, Http1Transaction, ParseContext, Wants};
@@ -538,9 +539,8 @@ where
 
                 #[cfg(feature = "ffi")]
                 {
-                    self.state.on_informational = head
-                        .extensions
-                        .remove::<crate::ffi::OnInformational>();
+                    self.state.on_informational =
+                        head.extensions.remove::<crate::ffi::OnInformational>();
                 }
 
                 Some(encoder)

src/proto/h1/decode.rs

@@ -4,6 +4,7 @@ use std::io;
 use std::usize;
 
 use bytes::Bytes;
+use tracing::{debug, trace};
 
 use crate::common::{task, Poll};
 

src/proto/h1/dispatch.rs

@@ -3,6 +3,7 @@ use std::error::Error as StdError;
 use bytes::{Buf, Bytes};
 use http::Request;
 use tokio::io::{AsyncRead, AsyncWrite};
+use tracing::{debug, trace};
 
 use super::{Http1Transaction, Wants};
 use crate::body::{Body, DecodedLength, HttpBody};

src/proto/h1/encode.rs

@@ -3,6 +3,7 @@ use std::io::IoSlice;
 
 use bytes::buf::{Chain, Take};
 use bytes::Buf;
+use tracing::trace;
 
 use super::io::WriteBuf;
 

src/proto/h1/io.rs

@@ -6,6 +6,7 @@ use std::mem::MaybeUninit;
 
 use bytes::{Buf, BufMut, Bytes, BytesMut};
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
+use tracing::{debug, trace};
 
 use super::{Http1Transaction, ParseContext, ParsedMessage};
 use crate::common::buf::BufList;

src/proto/h1/role.rs

@@ -8,6 +8,7 @@ use bytes::BytesMut;
 use http::header::ValueIter;
 use http::header::{self, Entry, HeaderName, HeaderValue};
 use http::{HeaderMap, Method, StatusCode, Version};
+use tracing::{debug, error, trace, trace_span, warn};
 
 use crate::body::DecodedLength;
 #[cfg(feature = "server")]
@@ -117,9 +118,8 @@ impl Http1Transaction for Server {
         };
         {
             /* SAFETY: it is safe to go from MaybeUninit array to array of MaybeUninit */
-            let mut headers: [MaybeUninit<httparse::Header<'_>>; MAX_HEADERS] = unsafe {
-                MaybeUninit::uninit().assume_init()
-            };
+            let mut headers: [MaybeUninit<httparse::Header<'_>>; MAX_HEADERS] =
+                unsafe { MaybeUninit::uninit().assume_init() };
             trace!(
                 "Request.parse([Header; {}], [u8; {}])",
                 headers.len(),
@@ -886,9 +886,11 @@ impl Http1Transaction for Client {
                 );
                 let mut res = httparse::Response::new(&mut []);
                 let bytes = buf.as_ref();
-                match ctx.h1_parser_config
-                    .parse_response_with_uninit_headers(&mut res, bytes, &mut headers)
-                {
+                match ctx.h1_parser_config.parse_response_with_uninit_headers(
+                    &mut res,
+                    bytes,
+                    &mut headers,
+                ) {
                     Ok(httparse::Status::Complete(len)) => {
                         trace!("Response.parse Complete({})", len);
                         let status = StatusCode::from_u16(res.code.unwrap())?;

src/proto/h2/client.rs

@@ -9,6 +9,7 @@ use futures_util::stream::StreamExt as _;
 use h2::client::{Builder, SendRequest};
 use http::{Method, StatusCode};
 use tokio::io::{AsyncRead, AsyncWrite};
+use tracing::{debug, trace, warn};
 
 use super::{ping, H2Upgraded, PipeToSendStream, SendBuf};
 use crate::body::HttpBody;

src/proto/h2/mod.rs

@@ -8,6 +8,7 @@ use std::io::{self, Cursor, IoSlice};
 use std::mem;
 use std::task::Context;
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
+use tracing::{debug, trace, warn};
 
 use crate::body::HttpBody;
 use crate::common::{task, Future, Pin, Poll};

src/proto/h2/ping.rs

@@ -34,6 +34,7 @@ use std::time::Instant;
 use h2::{Ping, PingPong};
 #[cfg(feature = "runtime")]
 use tokio::time::{Instant, Sleep};
+use tracing::{debug, trace};
 
 type WindowSize = u32;
 

src/proto/h2/server.rs

@@ -9,6 +9,7 @@ use h2::{Reason, RecvStream};
 use http::{Method, Request};
 use pin_project_lite::pin_project;
 use tokio::io::{AsyncRead, AsyncWrite};
+use tracing::{debug, trace, warn};
 
 use super::{ping, PipeToSendStream, SendBuf};
 use crate::body::HttpBody;

src/server/conn.rs

@@ -55,6 +55,7 @@ use std::time::Duration;
 use bytes::Bytes;
 use pin_project_lite::pin_project;
 use tokio::io::{AsyncRead, AsyncWrite};
+use tracing::trace;
 
 use super::accept::Accept;
 use crate::body::{Body, HttpBody};
@@ -1037,6 +1038,7 @@ where
 pub(crate) mod spawn_all {
     use std::error::Error as StdError;
     use tokio::io::{AsyncRead, AsyncWrite};
+    use tracing::debug;
 
     use super::{Connecting, UpgradeableConnection};
     use crate::body::{Body, HttpBody};

src/server/shutdown.rs

@@ -2,6 +2,7 @@ use std::error::Error as StdError;
 
 use pin_project_lite::pin_project;
 use tokio::io::{AsyncRead, AsyncWrite};
+use tracing::debug;
 
 use super::accept::Accept;
 use super::conn::{SpawnAll, UpgradeableConnection, Watcher};

src/server/tcp.rs

@@ -5,6 +5,7 @@ use std::time::Duration;
 
 use tokio::net::TcpListener;
 use tokio::time::Sleep;
+use tracing::{debug, error, trace};
 
 use crate::common::{task, Future, Pin, Poll};
 

src/upgrade.rs

@@ -14,6 +14,8 @@ use std::marker::Unpin;
 use bytes::Bytes;
 use tokio::io::{AsyncRead, AsyncWrite, ReadBuf};
 use tokio::sync::oneshot;
+#[cfg(any(feature = "http1", feature = "http2"))]
+use tracing::trace;
 
 use crate::common::io::Rewind;
 use crate::common::{task, Future, Pin, Poll};