Improve Makefile

 + Remove duplication
 + Add `all` target
 + Reference a fixed version of the gcloud SDK image

Signed-off-by: David Gageot <[email protected]>

Author: dgageot

gcp/Makefile

@@ -1,16 +1,23 @@
 # Copyright 2016 Docker Inc. All rights reserved.
 
-auth:
-	docker run -it --name gcloud-config google/cloud-sdk gcloud init
+GCLOUD_IMAGE_TAG = sha256:3a4e572df0c716196b3ffdeacaba3ebdd36f8cdfdac6d5ee4bd50cd405366736
+GCLOUD = docker run --rm -ti -v $(CURDIR)/configuration:/configuration --volumes-from gcloud-config google/cloud-sdk gcloud
+DEPLOYMENTS = $(GCLOUD) deployment-manager deployments
+
+all: auth create
+
+auth: revoke
+	docker run -it --name gcloud-config google/cloud-sdk@$(GCLOUD_IMAGE_TAG) true
+	$(GCLOUD) init
 
 revoke:
-	docker rm -f gcloud-config
+	docker rm gcloud-config || true
 
 create:
-	docker run --rm -ti -v $(CURDIR)/configuration:/configuration --volumes-from gcloud-config google/cloud-sdk gcloud deployment-manager deployments create docker --config configuration/docker.yaml
+	$(DEPLOYMENTS) create docker --config configuration/docker.yaml
 
 describe:
-	docker run --rm -ti -v $(CURDIR)/configuration:/configuration --volumes-from gcloud-config google/cloud-sdk gcloud deployment-manager deployments describe docker
+	$(DEPLOYMENTS) describe docker
 
 delete:
-	docker run --rm -ti -v $(CURDIR)/configuration:/configuration --volumes-from gcloud-config google/cloud-sdk gcloud deployment-manager deployments delete docker -q
+	$(DEPLOYMENTS) delete docker -q