VEX related improvements in the build process

Signed-off-by: Guilherme Macedo <[email protected]>

Makefile

@@ -79,7 +79,10 @@ $(SETUP_ENVTEST):
 
 .PHONY: operator
 operator:
-	CGO_ENABLED=0 go build -o bin/gke-operator main.go
+	CGO_ENABLED=0 go build -ldflags \
+            "-X github.com/rancher/gke-operator/pkg/version.GitCommit=$(GIT_COMMIT) \
+             -X github.com/rancher/gke-operator/pkg/version.Version=$(TAG)" \
+        -o bin/gke-operator .
 
 .PHONY: generate-go
 generate-go: $(MOCKGEN)

package/Dockerfile

@@ -11,6 +11,11 @@ RUN rm -rf /tmp/* /var/tmp/* /usr/share/doc/packages/*
 ENV KUBECONFIG="/home/gke-operator/.kube/config"
 ENV SSL_CERT_DIR="/etc/rancher/ssl"
 
+# Once this image is migrated to be SLSA compliant and the Go build happens
+# inside a build layer, we must pass the version and commit ID to the build,
+# similar to what was done in https://github.com/rancher/aks-operator/pull/803 .
+# This is just a reference for future changes, because it's needed for our VEX
+# work.
 COPY bin/gke-operator /usr/bin/
 COPY package/entrypoint.sh /usr/bin
 RUN chmod +x /usr/bin/entrypoint.sh