feat(reference): Add clone_with_digest() function

This allows to create a copy of the reference but setting a new digest.
This also copies the registry_mirror, so the digest also gets pulled
from the same mirror.

Signed-off-by: Benjamin Neff <[email protected]>

Author: SuperTux88

src/client.rs

@@ -867,11 +867,7 @@ impl Client {
                 match digest {
                     Some(digest) => {
                         debug!("Selected manifest entry with digest: {}", digest);
-                        let manifest_entry_reference = Reference::with_digest(
-                            image.registry().to_string(),
-                            image.repository().to_string(),
-                            digest.clone(),
-                        );
+                        let manifest_entry_reference = image.clone_with_digest(digest.clone());
                         self._pull_manifest(&manifest_entry_reference)
                             .await
                             .and_then(|(manifest, _digest)| match manifest {

src/reference.rs

@@ -104,6 +104,17 @@ impl Reference {
         }
     }
 
+    /// Clone the Reference for the same image with a new digest.
+    pub fn clone_with_digest(&self, digest: String) -> Self {
+        Self {
+            registry: self.registry.clone(),
+            mirror_registry: self.mirror_registry.clone(),
+            repository: self.repository.clone(),
+            tag: None,
+            digest: Some(digest),
+        }
+    }
+
     /// Set a pull mirror registry for this reference.
     ///
     /// The mirror registry will be used to resolve the image, the original registry