Make clippy happy (needless-return, etc.)

src/appservice_server.rs

@@ -25,7 +25,7 @@ where
 
     let mut parts = http_request.uri().clone().into_parts();
     let old_path_and_query = parts.path_and_query.unwrap().as_str().to_owned();
-    let symbol = if old_path_and_query.contains("?") {
+    let symbol = if old_path_and_query.contains('?') {
         "&"
     } else {
         "?"

src/client_server/push.rs

@@ -95,7 +95,7 @@ pub async fn get_pushrule_route(
     if let Some(rule) = rule {
         Ok(get_pushrule::Response { rule }.into())
     } else {
-        Err(Error::BadRequest(ErrorKind::NotFound, "Push rule not found.").into())
+        Err(Error::BadRequest(ErrorKind::NotFound, "Push rule not found."))
     }
 }
 

src/client_server/session.rs

@@ -119,8 +119,7 @@ pub async fn login_route(
     let device_exists = body.device_id.as_ref().map_or(false, |device_id| {
         db.users
             .all_device_ids(&user_id)
-            .find(|x| x.as_ref().map_or(false, |v| v == device_id))
-            .is_some()
+            .any(|x| x.as_ref().map_or(false, |v| v == device_id))
     });
 
     if device_exists {

src/database/globals.rs

@@ -9,9 +9,10 @@ use trust_dns_resolver::TokioAsyncResolver;
 
 pub const COUNTER: &str = "c";
 
+type WellKnownMap = HashMap<Box<ServerName>, (String, Option<String>)>;
 #[derive(Clone)]
 pub struct Globals {
-    pub actual_destination_cache: Arc<RwLock<HashMap<Box<ServerName>, (String, Option<String>)>>>, // actual_destination, host
+    pub actual_destination_cache: Arc<RwLock<WellKnownMap>>, // actual_destination, host
     pub(super) globals: sled::Tree,
     config: Config,
     keypair: Arc<ruma::signatures::Ed25519KeyPair>,

src/database/rooms.rs

@@ -183,7 +183,7 @@ impl Rooms {
                     )))
                 })
         } else {
-            return Ok(None);
+            Ok(None)
         }
     }
 
@@ -449,6 +449,7 @@ impl Rooms {
     ///
     /// By this point the incoming event should be fully authenticated, no auth happens
     /// in `append_pdu`.
+    #[allow(clippy::too_many_arguments)]
     pub fn append_pdu(
         &self,
         pdu: &PduEvent,
@@ -970,7 +971,7 @@ impl Rooms {
                     .get("users")
                     .and_then(|users| users.as_sequence())
                     .map_or_else(
-                        || Vec::new(),
+                        Vec::new,
                         |users| {
                             users
                                 .iter()
@@ -1002,7 +1003,7 @@ impl Rooms {
                     .and_then(|string| {
                         UserId::parse_with_server_name(string, globals.server_name()).ok()
                     });
-
+                #[allow(clippy::blocks_in_if_conditions)]
                 if bridge_user_id.map_or(false, |bridge_user_id| {
                     self.is_joined(&bridge_user_id, room_id).unwrap_or(false)
                 }) || users.iter().any(|users| {

src/database/sending.rs

@@ -102,7 +102,7 @@ impl Sending {
                         match response {
                             Ok((server, is_appservice)) => {
                                 let mut prefix = if is_appservice {
-                                    "+".as_bytes().to_vec()
+                                    b"+".to_vec()
                                 } else {
                                     Vec::new()
                                 };
@@ -148,7 +148,7 @@ impl Sending {
                             Err((server, is_appservice, e)) => {
                                 info!("Couldn't send transaction to {}\n{}", server, e);
                                 let mut prefix = if is_appservice {
-                                    "+".as_bytes().to_vec()
+                                    b"+".to_vec()
                                 } else {
                                     Vec::new()
                                 };
@@ -180,7 +180,7 @@ impl Sending {
                                 .map_err(|_| Error::bad_database("ServerName in servernamepduid bytes are invalid."))
                                 .map(|server_str| {
                                     // Appservices start with a plus
-                                    if server_str.starts_with("+") {
+                                    if server_str.starts_with('+') {
                                         (server_str[1..].to_owned(), true)
                                     } else {
                                         (server_str, false)
@@ -196,6 +196,7 @@ impl Sending {
                                     .map(|pdu_id| (server, is_appservice, pdu_id))
                                 )
                                 .filter(|(server, is_appservice, _)| {
+                                    #[allow(clippy::blocks_in_if_conditions)]
                                     if last_failed_try.get(server).map_or(false, |(tries, instant)| {
                                         // Fail if a request has failed recently (exponential backoff)
                                         let mut min_elapsed_duration = Duration::from_secs(60) * *tries * *tries;
@@ -209,7 +210,7 @@ impl Sending {
                                     }
 
                                     let mut prefix = if *is_appservice {
-                                        "+".as_bytes().to_vec()
+                                        b"+".to_vec()
                                     } else {
                                         Vec::new()
                                     };
@@ -247,7 +248,7 @@ impl Sending {
 
     #[tracing::instrument(skip(self))]
     pub fn send_pdu_appservice(&self, appservice_id: &str, pdu_id: &[u8]) -> Result<()> {
-        let mut key = "+".as_bytes().to_vec();
+        let mut key = b"+".to_vec();
         key.extend_from_slice(appservice_id.as_bytes());
         key.push(0xff);
         key.extend_from_slice(pdu_id);
@@ -385,7 +386,7 @@ impl Sending {
         })?;
 
         // Appservices start with a plus
-        let (server, is_appservice) = if server.starts_with("+") {
+        let (server, is_appservice) = if server.starts_with('+') {
             (&server[1..], true)
         } else {
             (&*server, false)

src/server_server.rs

@@ -220,7 +220,7 @@ fn add_port_to_hostname(destination_str: String) -> String {
 #[tracing::instrument(skip(globals))]
 async fn find_actual_destination(
     globals: &crate::database::globals::Globals,
-    destination: &Box<ServerName>,
+    destination: &'_ ServerName,
 ) -> (String, Option<String>) {
     let mut host = None;
 
@@ -277,9 +277,9 @@ async fn find_actual_destination(
 }
 
 #[tracing::instrument(skip(globals))]
-async fn query_srv_record<'a>(
+async fn query_srv_record(
     globals: &crate::database::globals::Globals,
-    hostname: &'a str,
+    hostname: &'_ str,
 ) -> Option<String> {
     if let Ok(Some(host_port)) = globals
         .dns_resolver()