apiVersion: kustomize.bdeshi.space/v1 kind: YqTransformer metadata: name: yq-transformer-dev-label # this can be anything annotations: config.kubernetes.io/function: | exec: path: ../../YqTransformer.sh targets: - apiVersion: apps/v1 kind: Deployment spec: template: spec: serviceAccountName: dev-app expression: | .metadata.labels.environment = "dev" | .spec.template.metadata.labels.environment = "dev"