add clippy lints

Cargo.toml

@@ -9,6 +9,21 @@ version = "1.9.9-pre-20"
 [workspace.lints.clippy]
 pedantic = "warn"
 
+branches_sharing_code = "warn"
+derive_partial_eq_without_eq = "warn"
+equatable_if_let = "warn"
+fallible_impl_from = "warn"
+large_stack_frames = "warn"
+missing_const_for_fn = "warn"
+needless_collect = "warn"
+needless_pass_by_ref_mut = "warn"
+or_fun_call = "warn"
+redundant_clone = "warn"
+significant_drop_in_scrutinee = "warn"
+significant_drop_tightening = "warn"
+too_long_first_doc_paragraph = "warn"
+trait_duplication_in_bounds = "warn"
+
 cast-possible-truncation = { level = "allow", priority = 1 }
 cast-precision-loss = { level = "allow", priority = 1 }
 default-trait-access = { level = "allow", priority = 1 }

charge-controller-supervisor/src/config.rs

@@ -73,7 +73,7 @@ impl ConfigWatcher {
 async fn overwrite_config(config: Config) -> eyre::Result<()> {
     let mut h = CONFIG
         .get()
-        .ok_or(eyre::eyre!("could not get config"))?
+        .ok_or_else(|| eyre::eyre!("could not get config"))?
         .write()
         .await;
     if h.charge_controllers != config.charge_controllers
@@ -82,6 +82,7 @@ async fn overwrite_config(config: Config) -> eyre::Result<()> {
         log::warn!("charge controller configuration changed on disk; please restart");
     }
     *h = config;
+    drop(h);
     Ok(())
 }
 
@@ -162,7 +163,7 @@ impl ConfigStorage {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Default)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq, Default)]
 #[serde(default)]
 pub struct Config {
     pub primary_charge_controller: String,
@@ -183,7 +184,7 @@ impl Config {
     }
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
 pub struct ChargeControllerConfig {
     pub name: String,
     pub watch_interval_seconds: u64,
@@ -193,13 +194,13 @@ pub struct ChargeControllerConfig {
     pub transport: Transport,
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
 pub enum ChargeControllerVariant {
     Tristar,
     Pl { timeout_milliseconds: u64 },
 }
 
-#[derive(Serialize, Deserialize, Clone, Debug, PartialEq)]
+#[derive(Serialize, Deserialize, Clone, Debug, PartialEq, Eq)]
 #[serde(rename_all = "lowercase")]
 pub enum Transport {
     Serial { port: String, baud_rate: u32 },

charge-controller-supervisor/src/controller.rs

@@ -118,7 +118,7 @@ impl Controller {
         Ok(())
     }
 
-    pub fn timeout_interval(&self) -> std::time::Duration {
+    pub const fn timeout_interval(&self) -> std::time::Duration {
         self.interval
     }
 

charge-controller-supervisor/src/controller/pl.rs

@@ -260,7 +260,7 @@ impl Pli {
         Ok(())
     }
 
-    fn flush(&mut self) -> eyre::Result<()> {
+    fn flush(&self) -> eyre::Result<()> {
         self.port.clear(tokio_serial::ClearBuffer::All)?;
         Ok(())
     }
@@ -286,9 +286,11 @@ impl Pli {
             }
         }
 
-        Err(last_err.unwrap_or(eyre::eyre!(
-            "no error was stored in read_ram_with_retries: this should be unreachable??"
-        )))
+        Err(last_err.unwrap_or_else(|| {
+            eyre::eyre!(
+                "no error was stored in read_ram_with_retries: this should be unreachable??"
+            )
+        }))
     }
 
     async fn read_ram_single<T>(&mut self, address: T) -> eyre::Result<u8>
@@ -398,6 +400,6 @@ impl From<PlRamAddress> for u8 {
     }
 }
 
-fn command(operation: u8, address: u8, data: u8) -> [u8; 4] {
+const fn command(operation: u8, address: u8, data: u8) -> [u8; 4] {
     [operation, address, data, !operation]
 }

charge-controller-supervisor/src/controller/tristar.rs

@@ -216,7 +216,7 @@ impl ChargeStateGauges {
         }
     }
 
-    fn zero_all(&mut self) {
+    fn zero_all(&self) {
         self.start.set(0);
         self.night_check.set(0);
         self.disconnect.set(0);
@@ -230,7 +230,7 @@ impl ChargeStateGauges {
         self.unknown.set(0);
     }
 
-    fn set(&mut self, state: ChargeState) {
+    fn set(&self, state: ChargeState) {
         match state {
             ChargeState::Start => {
                 self.zero_all();

charge-controller-supervisor/src/main.rs

@@ -131,6 +131,8 @@ async fn watch(args: Args) -> eyre::Result<()> {
             primary.set_tx_to_secondary(follow_voltage_tx.clone());
         }
 
+        drop(config);
+
         let controller_tasks = futures::stream::FuturesUnordered::new();
         for controller in controllers {
             controller_tasks.push(run_loop(controller));

charge-controller-supervisor/src/web.rs

@@ -87,7 +87,8 @@ async fn all_interfaces(
     let mut data = Vec::new();
 
     for (k, v) in &state.map {
-        if let Some(v) = v.read().await.as_ref() {
+        let v = v.read().await;
+        if let Some(v) = v.as_ref() {
             data.push((k.clone(), v.common().clone()));
         }
     }

charge-controller-supervisor/src/web/static_handler.rs

@@ -51,10 +51,12 @@ impl Handler for UiStatic {
                             data: v.contents().to_vec(),
                             name: p,
                         })
-                        .or(UI_DIR_FILES.get_file(&plus_index).map(|v| RawHtml {
-                            data: v.contents().to_vec(),
-                            name: plus_index,
-                        }));
+                        .or_else(|| {
+                            UI_DIR_FILES.get_file(&plus_index).map(|v| RawHtml {
+                                data: v.contents().to_vec(),
+                                name: plus_index,
+                            })
+                        });
                     file.respond_to(req).or_forward((data, Status::NotFound))
                 }
             }