Fix various minor lints

- Fix an unused variable in ostree-ext
- Fix other clippy lints

Signed-off-by: Colin Walters <[email protected]>

lib/src/deploy.rs

@@ -508,7 +508,7 @@ pub(crate) async fn rollback(sysroot: &Storage) -> Result<()> {
             ("MESSAGE_ID", ROLLBACK_JOURNAL_ID),
             (
                 "BOOTC_MANIFEST_DIGEST",
-                &rollback_image.manifest_digest.to_string(),
+                rollback_image.manifest_digest.as_ref(),
             ),
         ]
         .into_iter(),

lib/src/status.rs

@@ -389,7 +389,7 @@ fn human_render_imagestatus(
         } else {
             writeln!(out, "{version}")?;
         }
-    } else if let Some(timestamp) = timestamp.as_deref() {
+    } else if let Some(timestamp) = timestamp {
         // Otherwise just output timestamp
         write_row_name(&mut out, "Timestamp", prefix_len)?;
         writeln!(out, "{timestamp}")?;

ostree-ext/src/container/store.rs

@@ -68,7 +68,7 @@ fn ref_for_blob_digest(d: &str) -> Result<String> {
 
 /// Convert e.g. sha256:12345... into `/ostree/container/blob/sha256_2B12345...`.
 fn ref_for_layer(l: &oci_image::Descriptor) -> Result<String> {
-    ref_for_blob_digest(&l.digest().to_string())
+    ref_for_blob_digest(&l.digest().as_ref())
 }
 
 /// Convert e.g. sha256:12345... into `/ostree/container/blob/sha256_2B12345...`.

ostree-ext/tests/it/main.rs

@@ -1256,7 +1256,7 @@ async fn test_container_etc_hardlinked(absolute: bool) -> Result<()> {
 #[tokio::test]
 async fn test_non_ostree() -> Result<()> {
     let fixture = NonOstreeFixture::new_base()?;
-    let (src_imgref, src_digest) = fixture.export_container().await?;
+    let src_digest = fixture.export_container().await?.1;
 
     let imgref = fixture.export_container().await.unwrap().0;
     let imp = fixture.must_import(&imgref).await?;