Make clippy happy

Signed-off-by: Ryan Levick <ryan.levick@fermyon.com>

Author: rylev

crates/http/src/routes.rs

@@ -226,7 +226,7 @@ pub struct RouteMatch<'router, 'path> {
     inner: RouteMatchKind<'router, 'path>,
 }
 
-impl<'router, 'path> RouteMatch<'router, 'path> {
+impl RouteMatch<'_, '_> {
     /// A synthetic match as if the given path was matched against the wildcard route.
     /// Used in service chaining.
     pub fn synthetic(component_id: String, path: String) -> Self {
@@ -309,7 +309,7 @@ enum RouteMatchKind<'router, 'path> {
     },
 }
 
-impl<'router, 'path> RouteMatchKind<'router, 'path> {
+impl RouteMatchKind<'_, '_> {
     /// The route handler that matched the path.
     fn route_handler(&self) -> &RouteHandler {
         match self {

crates/oci/src/client.rs

@@ -801,8 +801,8 @@ pub async fn unpack_archive_layer(
 fn digest_from_url(manifest_url: &str) -> Option<String> {
     // The URL is in the form "https://host/v2/refname/manifests/sha256:..."
     let manifest_url = Url::parse(manifest_url).ok()?;
-    let segments = manifest_url.path_segments()?;
-    let last = segments.last()?;
+    let mut segments = manifest_url.path_segments()?;
+    let last = segments.next_back()?;
     if last.contains(':') {
         Some(last.to_owned())
     } else {

crates/trigger-http/src/headers.rs

@@ -25,12 +25,16 @@ pub const RAW_COMPONENT_ROUTE: [&str; 2] = ["SPIN_RAW_COMPONENT_ROUTE", "X_RAW_C
 pub const BASE_PATH: [&str; 2] = ["SPIN_BASE_PATH", "X_BASE_PATH"];
 pub const CLIENT_ADDR: [&str; 2] = ["SPIN_CLIENT_ADDR", "X_CLIENT_ADDR"];
 
+// Header key/value pairs that use copy on write to avoid allocation
+pub type HeaderPair<'a> = ([Cow<'static, str>; 2], Cow<'a, str>);
+
+/// Compute the default headers to be passed to the component.
 pub fn compute_default_headers<'a>(
     uri: &Uri,
     host: &str,
     route_match: &'a RouteMatch,
     client_addr: SocketAddr,
-) -> anyhow::Result<Vec<([Cow<'static, str>; 2], Cow<'a, str>)>> {
+) -> anyhow::Result<Vec<HeaderPair<'a>>> {
     fn owned(strs: &[&'static str; 2]) -> [Cow<'static, str>; 2] {
         [strs[0].into(), strs[1].into()]
     }

tests/test-components/build.rs

@@ -58,7 +58,7 @@ fn main() {
             .join("debug")
             .join(format!("{binary_name}.wasm"));
 
-        let adapter_version = package.split('v').last().and_then(|v| match v {
+        let adapter_version = package.split('v').next_back().and_then(|v| match v {
             // Only allow these versions through
             "0.2.0-rc-2023-11-10" | "0.2.0" => Some(v),
             _ => None,