allow compiling embedded-cluster with overridden operator image (#487)

Author: laverya

Makefile

@@ -11,6 +11,7 @@ EMBEDDED_OPERATOR_CHART_URL = oci://registry.replicated.com/library
 EMBEDDED_OPERATOR_CHART_NAME = embedded-cluster-operator
 EMBEDDED_OPERATOR_CHART_VERSION = 0.27.0
 EMBEDDED_OPERATOR_UTILS_IMAGE = busybox:1.36.1
+EMBEDDED_CLUSTER_OPERATOR_IMAGE_OVERRIDE =
 OPENEBS_CHART_URL = https://openebs.github.io/charts
 OPENEBS_CHART_NAME = openebs/openebs
 OPENEBS_CHART_VERSION = 3.10.0
@@ -38,6 +39,7 @@ LD_FLAGS = -X github.com/replicatedhq/embedded-cluster/pkg/defaults.K0sVersion=$
 	-X github.com/replicatedhq/embedded-cluster/pkg/addons/embeddedclusteroperator.ChartName=$(EMBEDDED_OPERATOR_CHART_NAME) \
 	-X github.com/replicatedhq/embedded-cluster/pkg/addons/embeddedclusteroperator.Version=$(EMBEDDED_OPERATOR_CHART_VERSION) \
 	-X github.com/replicatedhq/embedded-cluster/pkg/addons/embeddedclusteroperator.UtilsImage=$(EMBEDDED_OPERATOR_UTILS_IMAGE) \
+	-X github.com/replicatedhq/embedded-cluster/pkg/addons/embeddedclusteroperator.ImageOverride=$(EMBEDDED_CLUSTER_OPERATOR_IMAGE_OVERRIDE) \
 	-X github.com/replicatedhq/embedded-cluster/pkg/addons/openebs.ChartURL=$(OPENEBS_CHART_URL) \
 	-X github.com/replicatedhq/embedded-cluster/pkg/addons/openebs.ChartName=$(OPENEBS_CHART_NAME) \
 	-X github.com/replicatedhq/embedded-cluster/pkg/addons/openebs.Version=$(OPENEBS_CHART_VERSION) \

pkg/addons/embeddedclusteroperator/embeddedclusteroperator.go

@@ -35,10 +35,11 @@ const (
 
 // Overwritten by -ldflags in Makefile
 var (
-	ChartURL   = "https://url"
-	ChartName  = "name"
-	Version    = "v0.0.0"
-	UtilsImage = "busybox:latest"
+	ChartURL      = "https://url"
+	ChartName     = "name"
+	Version       = "v0.0.0"
+	UtilsImage    = "busybox:latest"
+	ImageOverride = ""
 )
 
 var helmValues = map[string]interface{}{
@@ -48,6 +49,21 @@ var helmValues = map[string]interface{}{
 	"utilsImage":                UtilsImage,
 }
 
+func init() {
+	if ImageOverride != "" {
+		// split ImageOverride into the image and tag
+		parts := strings.Split(ImageOverride, ":")
+		if len(parts) != 2 {
+			panic(fmt.Sprintf("invalid image override: %s", ImageOverride))
+		}
+
+		helmValues["image"] = map[string]interface{}{
+			"repository": parts[0],
+			"tag":        parts[1],
+		}
+	}
+}
+
 // EmbeddedClusterOperator manages the installation of the embedded cluster operator
 // helm chart.
 type EmbeddedClusterOperator struct {