label all resources according to pipeline name and stage

k8s-kustomizations/pipelines/nginx/dev/kustomization.yaml

@@ -1,5 +1,8 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
+commonLabels:
+  pipelines.weave.works/name: nginx
+  pipelines.weave.works/stage: "0"
 namespace: dev
 resources:
 - ../../../apps/

k8s-kustomizations/pipelines/nginx/prod/kustomization.yaml

@@ -1,5 +1,8 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
+commonLabels:
+  pipelines.weave.works/name: nginx
+  pipelines.weave.works/stage: "2"
 namespace: prod
 resources:
 - ../../../apps/

k8s-kustomizations/pipelines/nginx/staging/kustomization.yaml

@@ -1,5 +1,8 @@
 apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
+commonLabels:
+  pipelines.weave.works/name: nginx
+  pipelines.weave.works/stage: "1"
 namespace: staging
 resources:
 - ../../../apps/