Derive Copy and Clone for LayerTypes (#670)

I want to be able to inject `LayerType` into a struct instead of needing to hard code it. Currently this can be done but isn't ergonomic because `LayerTypes` is not clone. Co-authored-by: Ed Morley <[email protected]>
heroku · Sep 22, 2023 · c7b2b6a · c7b2b6a
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Added
 
+- `libcnb`:
+  - `LayerTypes` now implements `Copy` and `Clone`. ([#670](https://github.com/heroku/libcnb.rs/pull/670)).
 - `libcnb-data`:
   - `ExecDProgramOutputKey`, `ProcessType`, `LayerName`, `BuildpackId` and `StackId` now implement `Ord` and `PartialOrd`. ([#658](https://github.com/heroku/libcnb.rs/pull/658))
   - Added `generic::GenericMetadata` as a generic metadata type. Also makes it the default for `BuildpackDescriptor`, `SingleBuildpackDescriptor`, `CompositeBuildpackDescriptor` and `LayerContentMetadata`. ([#664](https://github.com/heroku/libcnb.rs/pull/664))

diff --git a/libcnb-data/src/layer_content_metadata.rs b/libcnb-data/src/layer_content_metadata.rs
@@ -21,7 +21,7 @@ impl<M: PartialEq> PartialEq for LayerContentMetadata<M> {
 
 /// Used to specify layer availability based
 /// on buildpack phase.
-#[derive(Debug, Default, Deserialize, Serialize, Eq, PartialEq)]
+#[derive(Debug, Default, Deserialize, Serialize, Eq, PartialEq, Copy, Clone)]
 #[serde(deny_unknown_fields)]
 pub struct LayerTypes {
     /// Whether the layer is intended for launch.