Fix Clippy issues and add Rust checks to CI

.github/workflows/build.yaml

@@ -5,6 +5,20 @@ on:
   workflow_call:
 
 jobs:
+  checks:
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+
+      - uses: DeterminateSystems/nix-installer-action-cache@main
+
+      - name: Check Rust formatting
+        run: nix develop --command cargo fmt --check
+      
+      - name: Clippy
+        run: nix develop --command cargo clippy
+
+
   build-artifacts-X64-macOS:
     runs-on: macos-12
     steps:

gha-cache/src/api.rs

@@ -390,8 +390,7 @@ impl Api {
         future::join_all(futures)
             .await
             .into_iter()
-            .map(|join_result| join_result.unwrap())
-            .collect::<Result<()>>()?;
+            .try_for_each(|join_result| join_result.unwrap())?;
 
         tracing::debug!("Received all chunks for cache {:?}", allocation.0);
 

nix-actions-cache/src/error.rs

@@ -1,21 +1,17 @@
 //! Errors.
 
-use std::io::Error as IoError;
-
 use axum::{
     http::StatusCode,
     response::{IntoResponse, Response},
 };
 use thiserror::Error;
 
-use gha_cache::api::Error as ApiError;
-
 pub type Result<T> = std::result::Result<T, Error>;
 
 #[derive(Error, Debug)]
 pub enum Error {
     #[error("GitHub API error: {0}")]
-    ApiError(#[from] ApiError),
+    Api(#[from] gha_cache::api::Error),
 
     #[error("Not Found")]
     NotFound,
@@ -24,7 +20,7 @@ pub enum Error {
     BadRequest,
 
     #[error("I/O error: {0}")]
-    IoError(#[from] IoError),
+    Io(#[from] std::io::Error),
 
     #[error("Failed to upload paths")]
     FailedToUpload,
@@ -34,7 +30,7 @@ impl IntoResponse for Error {
     fn into_response(self) -> Response {
         let code = match &self {
             // HACK: HTTP 418 makes Nix throw a visible error but not retry
-            Self::ApiError(_) => StatusCode::IM_A_TEAPOT,
+            Self::Api(_) => StatusCode::IM_A_TEAPOT,
             Self::NotFound => StatusCode::NOT_FOUND,
             Self::BadRequest => StatusCode::BAD_REQUEST,
             _ => StatusCode::INTERNAL_SERVER_ERROR,

nix-actions-cache/src/util.rs

@@ -33,7 +33,7 @@ pub async fn get_store_paths() -> Result<HashSet<PathBuf>> {
             }
 
             // Special paths (so far only `.links`)
-            if s.starts_with(".") {
+            if s.starts_with('.') {
                 continue;
             }
         }
@@ -47,7 +47,7 @@ pub async fn get_store_paths() -> Result<HashSet<PathBuf>> {
 pub async fn upload_paths(mut paths: Vec<PathBuf>, store_uri: &str) -> Result<()> {
     // When the daemon started Nix may not have been installed
     let env_path = Command::new("sh")
-        .args(&["-lc", "echo $PATH"])
+        .args(["-lc", "echo $PATH"])
         .output()
         .await?
         .stdout;
@@ -66,8 +66,8 @@ pub async fn upload_paths(mut paths: Vec<PathBuf>, store_uri: &str) -> Result<()
         tracing::debug!("{} paths in this batch", batch.len());
 
         let status = Command::new("nix")
-            .args(&["--extra-experimental-features", "nix-command"])
-            .args(&["copy", "--to", store_uri])
+            .args(["--extra-experimental-features", "nix-command"])
+            .args(["copy", "--to", store_uri])
             .args(&batch)
             .env("PATH", &env_path)
             .status()