fix clippy warnings

Author: Firestar99

crates/cargo-gpu/src/lib.rs

@@ -94,6 +94,7 @@ macro_rules! user_output {
 
 /// All of the available subcommands for `cargo gpu`
 #[derive(clap::Subcommand)]
+#[non_exhaustive]
 pub enum Command {
     /// Install rust-gpu compiler artifacts.
     Install(Box<Install>),
@@ -112,7 +113,11 @@ pub enum Command {
 }
 
 impl Command {
-    /// run the command
+    /// Runs the command
+    ///
+    /// # Errors
+    /// Any errors during execution, usually printed to the user
+    #[inline]
     pub fn run(&self, env_args: Vec<String>) -> anyhow::Result<()> {
         match &self {
             Self::Install(install) => {
@@ -152,13 +157,18 @@ impl Command {
 /// the Cli struct representing the main cli
 #[derive(clap::Parser)]
 #[clap(author, version, about, subcommand_required = true)]
+#[non_exhaustive]
 pub struct Cli {
     /// The command to run.
     #[clap(subcommand)]
     pub command: Command,
 }
 
 /// The central cache directory of cargo gpu
+///
+/// # Errors
+/// may fail if we can't find the user home directory
+#[inline]
 pub fn cache_dir() -> anyhow::Result<std::path::PathBuf> {
     let dir = directories::BaseDirs::new()
         .with_context(|| "could not find the user home directory")?

crates/cargo-gpu/src/main.rs

@@ -1,6 +1,6 @@
 //! main executable of cargo gpu
 use cargo_gpu::Cli;
-use clap::Parser;
+use clap::Parser as _;
 
 fn main() {
     #[cfg(debug_assertions)]
@@ -27,7 +27,7 @@ fn main() {
 }
 
 /// Wrappable "main" to catch errors.
-pub fn run() -> anyhow::Result<()> {
+fn run() -> anyhow::Result<()> {
     let env_args = std::env::args()
         .filter(|arg| {
             // Calling our `main()` with the cargo subcommand `cargo gpu` passes "gpu"