expose LoadFormat in TemplateVars to enable runai-streamer templates

Adds a LoadFormat field to TemplateVars and populates it from
.Spec.ModelArtifacts.LoadFormat, letting the controller render
ConfigMap templates for --load-format.

Signed-off-by: Brent Salisbury <bsalisbu@redhat.com>

Author: nerdalert

internal/controller/child_resources.go

@@ -392,6 +392,30 @@ func sanitizeModelName(msvc *msv1alpha1.ModelService) string {
 	return sanitizedModelName
 }
 
+// pickLoadFormat walks through all container / init-container args inside a
+// PDSpec and returns the value that appears immediately after "--load-format".
+func pickLoadFormat(pd *msv1alpha1.PDSpec) string {
+	if pd == nil {
+		return ""
+	}
+
+	search := func(conts []msv1alpha1.ContainerSpec) string {
+		for _, c := range conts {
+			for i, a := range c.Args {
+				if a == "--load-format" && i+1 < len(c.Args) {
+					return c.Args[i+1]
+				}
+			}
+		}
+		return ""
+	}
+
+	if lf := search(pd.Containers); lf != "" {
+		return lf
+	}
+	return search(pd.InitContainers)
+}
+
 // mergePDService uses msvc fields to update childResource P/D Service
 func (childResource *BaseConfig) mergePDService(ctx context.Context, msvc *msv1alpha1.ModelService, role string, scheme *runtime.Scheme) *BaseConfig {
 

internal/controller/modelservice_controller.go

@@ -86,6 +86,7 @@ type TemplateVars struct {
 	DecodeServiceName     string `json:"decodeServiceName,omitempty"`
 	InferencePoolName     string `json:"inferencePoolName,omitempty"`
 	InferenceModelName    string `json:"inferenceModelName,omitempty"`
+	LoadFormat            string `json:"loadFormat,omitempty"`
 }
 
 // from populates the field values for TemplateVars from the model service
@@ -113,6 +114,10 @@ func (t *TemplateVars) from(ctx context.Context, msvc *msv1alpha1.ModelService)
 	t.InferenceModelName = infModelName(msvc)
 	t.ModelName = msvc.Spec.Routing.ModelName
 	t.SanitizedModelName = sanitizeModelName(msvc)
+	t.LoadFormat = pickLoadFormat(msvc.Spec.Decode)
+	if t.LoadFormat == "" {
+		t.LoadFormat = pickLoadFormat(msvc.Spec.Prefill)
+	}
 
 	if msvc.Spec.ModelArtifacts.AuthSecretName != nil {
 		t.AuthSecretName = *msvc.Spec.ModelArtifacts.AuthSecretName