.github/: Enforce no clippy warnings (#2148)

* Fix remaining clippy warnings.

Co-authored-by: Max Inden <mail@max-inden.de>

.cargo/config.toml

@@ -0,0 +1,3 @@
+[alias]
+# Temporary solution to have clippy config in a single place until https://github.com/rust-lang/rust-clippy/blob/master/doc/roadmap-2021.md#lintstoml-configuration is shipped.
+custom-clippy = "clippy -- -A clippy::type_complexity -A clippy::pedantic -A clippy::style -D warnings"

.github/workflows/ci.yml

@@ -152,8 +152,7 @@ jobs:
     - name: Run cargo clippy
       uses: actions-rs/cargo@v1.0.3
       with:
-        command: clippy
+        command: custom-clippy # cargo alias to allow reuse of config locally
-        args: -- -A clippy::type_complexity -A clippy::pedantic -A clippy::style
 
   integration-test:
     name: Integration tests

protocols/relay/src/behaviour.rs

@@ -756,6 +756,7 @@ impl NetworkBehaviour for Relay {
 }
 
 #[derive(Debug)]
+#[allow(clippy::large_enum_variant)]
 pub enum BehaviourToListenerMsg {
     ConnectionToRelayEstablished,
     IncomingRelayedConnection {

protocols/relay/src/handler.rs

@@ -733,6 +733,7 @@ impl ProtocolsHandler for RelayHandler {
     }
 }
 
+#[allow(clippy::large_enum_variant)]
 pub enum RelayOutboundOpenInfo {
     Relay {
         dst_peer_id: PeerId,

protocols/relay/src/protocol/listen.rs

@@ -76,7 +76,7 @@ impl upgrade::InboundUpgrade<NegotiatedSubstream> for RelayListen {
             let msg: bytes::BytesMut = substream
                 .next()
                 .await
-                .ok_or(std::io::Error::new(std::io::ErrorKind::UnexpectedEof, ""))??;
+                .ok_or_else(|| std::io::Error::new(std::io::ErrorKind::UnexpectedEof, ""))??;
             let CircuitRelay {
                 r#type,
                 src_peer,

protocols/relay/src/protocol/outgoing_dst_req.rs

@@ -100,7 +100,7 @@ impl upgrade::OutboundUpgrade<NegotiatedSubstream> for OutgoingDstReq {
                 substream
                     .next()
                     .await
-                    .ok_or(OutgoingDstReqError::Io(std::io::Error::new(
+                    .ok_or_else(|| OutgoingDstReqError::Io(std::io::Error::new(
                         std::io::ErrorKind::UnexpectedEof,
                         "",
                     )))??;

protocols/relay/src/protocol/outgoing_relay_req.rs

@@ -87,7 +87,7 @@ impl upgrade::OutboundUpgrade<NegotiatedSubstream> for OutgoingRelayReq {
             }),
             dst_peer: Some(circuit_relay::Peer {
                 id: dst_id.to_bytes(),
-                addrs: vec![dst_address.unwrap_or(Multiaddr::empty()).to_vec()],
+                addrs: vec![dst_address.unwrap_or_else(Multiaddr::empty).to_vec()],
             }),
             code: None,
         };
@@ -107,7 +107,7 @@ impl upgrade::OutboundUpgrade<NegotiatedSubstream> for OutgoingRelayReq {
                 substream
                     .next()
                     .await
-                    .ok_or(OutgoingRelayReqError::Io(std::io::Error::new(
+                    .ok_or_else(|| OutgoingRelayReqError::Io(std::io::Error::new(
                         std::io::ErrorKind::UnexpectedEof,
                         "",
                     )))??;

protocols/relay/src/transport.rs

@@ -198,7 +198,7 @@ impl<T: Transport + Clone> Transport for RelayTransport<T> {
                 };
 
                 let (to_listener, from_behaviour) = mpsc::channel(0);
-                let mut to_behaviour = self.to_behaviour.clone();
+                let mut to_behaviour = self.to_behaviour;
                 let msg_to_behaviour = Some(
                     async move {
                         to_behaviour
@@ -242,7 +242,7 @@ impl<T: Transport + Clone> Transport for RelayTransport<T> {
                 let relay_addr = relay_addr.ok_or(RelayError::MissingRelayAddr)?;
                 let dst_peer_id = dst_peer_id.ok_or(RelayError::MissingDstPeerId)?;
 
-                let mut to_behaviour = self.to_behaviour.clone();
+                let mut to_behaviour = self.to_behaviour;
                 Ok(EitherFuture::Second(
                     async move {
                         let (tx, rx) = oneshot::channel();

transports/dns/src/lib.rs

@@ -330,6 +330,7 @@ where
 
 /// The possible errors of a [`GenDnsConfig`] wrapped transport.
 #[derive(Debug)]
+#[allow(clippy::large_enum_variant)]
 pub enum DnsErr<TErr> {
     /// The underlying transport encountered an error.
     Transport(TErr),