Check code generation as part of release / hashrelease (#9554)

* Check code generation as part of release / hashrelease

* Add better error mesg

release/pkg/manager/calico/manager.go

@@ -364,6 +364,7 @@ func (r *CalicoManager) PreReleaseValidate(ver string) error {
 			return fmt.Errorf("current branch (%s) is not a release branch", branch)
 		}
 	}
+
 	// Check that we're not already on a git tag.
 	out, err := r.git("describe", "--exact-match", "--tags", "HEAD")
 	if err == nil {
@@ -380,6 +381,11 @@ func (r *CalicoManager) PreReleaseValidate(ver string) error {
 		return fmt.Errorf("Attempt to release from a shallow clone is not possible")
 	}
 
+	// Check that code generation is up-to-date.
+	if _, err := r.runner.RunInDir(r.repoRoot, "make", []string{"generate", "get-operator-crds", "check-dirty"}, nil); err != nil {
+		return fmt.Errorf("code generation error (try 'make generate' and/or 'make get-operator-crds' ?): %s", err)
+	}
+
 	// Assert that manifests are using the correct version.
 	err = r.assertManifestVersions(ver)
 	if err != nil {