install: take ownership in InstallMethod::install()

Author: djc

src/install.rs

@@ -37,13 +37,13 @@ pub(crate) enum InstallMethod<'a> {
 impl InstallMethod<'_> {
     // Install a toolchain
     #[tracing::instrument(level = "trace", err(level = "trace"), skip_all)]
-    pub(crate) async fn install(&self) -> Result<UpdateStatus> {
+    pub(crate) async fn install(self) -> Result<UpdateStatus> {
         // Initialize rayon for use by the remove_dir_all crate limiting the number of threads.
         // This will error if rayon is already initialized but it's fine to ignore that.
         let _ = rayon::ThreadPoolBuilder::new()
             .num_threads(self.cfg().process.io_thread_count()?)
             .build_global();
-        match self {
+        match &self {
             InstallMethod::Copy { .. }
             | InstallMethod::Link { .. }
             | InstallMethod::Dist(DistOptions {
@@ -63,7 +63,7 @@ impl InstallMethod<'_> {
             }
             true => {
                 debug!("toolchain {} installed", self.dest_basename());
-                match self {
+                match &self {
                     InstallMethod::Dist(DistOptions {
                         old_date_version: Some((_, v)),
                         ..