feat(versioned): Add support for the selectable argument

crates/stackable-versioned-macros/src/attrs/container.rs

@@ -53,6 +53,8 @@ pub struct ContainerSkipArguments {
 /// - `scale`: Configure the scale subresource for horizontal pod autoscaling integration.
 /// - `shortname`: Set a shortname for the CR object. This can be specified multiple
 ///   times.
+/// - `selectable`: Set the JSON path of a field which can be used as a field selector.
+///   This can be specified multiple times.
 /// - `doc`: Set the root description of the generated CRD. This argument is required, so
 ///   that every CRD has a meaningful description instead of the generic one that kube
 ///   generates by default.
@@ -73,7 +75,8 @@ pub struct StructCrdArguments {
     #[darling(multiple, rename = "shortname")]
     pub shortnames: Vec<String>,
     // category
-    // selectable
+    #[darling(multiple, rename = "selectable")]
+    pub selectable_fields: Vec<String>,
     pub doc: String,
     // annotation
     // label

crates/stackable-versioned-macros/src/codegen/container/struct/mod.rs

@@ -319,6 +319,13 @@ impl Struct {
             .map(|s| quote! { , shortname = #s })
             .collect();
 
+        let selectable_fields: TokenStream = spec_gen_ctx
+            .kubernetes_arguments
+            .selectable_fields
+            .iter()
+            .map(|s| quote! { , selectable = #s })
+            .collect();
+
         let doc = &spec_gen_ctx.kubernetes_arguments.doc;
 
         quote! {
@@ -328,7 +335,7 @@ impl Struct {
                 // These must be comma separated (except the last) as they always exist:
                 group = #group, version = #version, kind = #kind, doc = #doc
                 // These fields are optional, and therefore the token stream must prefix each with a comma:
-                #singular #plural #namespaced #crates #status #scale #shortnames
+                #singular #plural #namespaced #crates #status #scale #shortnames #selectable_fields
             )]
         }
     }

crates/stackable-versioned-macros/src/lib.rs

@@ -348,7 +348,11 @@ mod utils;
 ///         // the generated tracking status struct.
 ///         status = "FooStatus",
 ///         // Set a shortname. This can be specified multiple times.
-///         shortname = "..."
+///         shortname = "...",
+///         // Set the JSON path of a field which can be used as a field
+///         // selector. This can be specified multiple times. The path is used
+///         // for all versions, so the field must exist in every version.
+///         selectable = ".spec.baz"
 ///     ))]
 /// #   #[derive(Clone, Debug, Deserialize, Serialize, CustomResource, JsonSchema)]
 ///     pub struct FooSpec {

crates/stackable-versioned-macros/tests/inputs/pass/selectable.rs

@@ -0,0 +1,26 @@
+use stackable_versioned::versioned;
+// ---
+#[versioned(version(name = "v1alpha1"), version(name = "v1beta1"))]
+// ---
+pub(crate) mod versioned {
+    #[versioned(crd(
+        group = "stackable.tech",
+        selectable = ".spec.bar",
+        selectable = ".spec.baz",
+        doc = "Test"
+    ))]
+    #[derive(
+        Clone,
+        Debug,
+        serde::Deserialize,
+        serde::Serialize,
+        schemars::JsonSchema,
+        kube::CustomResource,
+    )]
+    pub(crate) struct FooSpec {
+        bar: String,
+        baz: bool,
+    }
+}
+// ---
+fn main() {}