Group imports by StdExternalCrate

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ jobs:
       with:
         components: clippy, rustfmt
     - name: Check formatting
-      run: cargo fmt -- --check
+      run: cargo fmt -- --check --config group_imports=StdExternalCrate
     - name: Clippy
       run: cargo clippy -- -D warnings -W clippy::pedantic
     - name: markdownlint

src/frame.rs

@@ -1,9 +1,10 @@
 //! Functions and errors for handling length-delimited frames.
 
+use std::{io, mem};
+
 use bincode::Options;
 use quinn::{RecvStream, SendStream};
 use serde::{Deserialize, Serialize};
-use std::{io, mem};
 
 /// Receives and deserializes a message with a big-endian 4-byte length header.
 ///

src/message.rs

@@ -1,10 +1,12 @@
 //! Functions and errors for handling messages.
 
-use crate::frame;
+use std::{fmt, io, mem};
+
 use bincode::Options;
 use quinn::{RecvStream, SendStream};
 use serde::Serialize;
-use std::{fmt, io, mem};
+
+use crate::frame;
 
 /// Receives a message as a stream of bytes with a big-endian 4-byte length
 /// header.

src/request.rs

@@ -2,11 +2,12 @@
 
 use std::io;
 
-use crate::{frame, message};
 use bincode::Options;
 use quinn::SendStream;
 use serde::{Deserialize, Serialize};
 
+use crate::{frame, message};
+
 /// Parses the arguments of a request.
 ///
 /// # Errors

src/test.rs

@@ -22,11 +22,13 @@ lazy_static! {
 /// Creates a bidirectional channel, returning server's send and receive and
 /// client's send and receive streams.
 pub(crate) async fn channel() -> Channel {
-    use rustls::pki_types::{CertificateDer, PrivatePkcs8KeyDer};
     use std::{
         net::{IpAddr, Ipv6Addr, SocketAddr},
         sync::Arc,
     };
+
+    use rustls::pki_types::{CertificateDer, PrivatePkcs8KeyDer};
+
     const TEST_SERVER_NAME: &str = "test-server";
     const TEST_PORT: u16 = 60190;