* Better build scripts which are now source aware

infra/Makefile

@@ -2,17 +2,21 @@ plan=out.plan
 
 SHELL := /bin/bash
 
-build:
+$(plan): *.tf
 	source secrets/set-env.sh && terraform plan -out $(plan)
 
+push: build
+	source secrets/set-env.sh && terraform apply $(plan)
+
+refresh:
+	source secrets/set-env.sh && terraform apply -refresh-only
+
 test:
 	terraform validate
 
-push:
-	terraform apply $(plan)
 
 rip:
-	terraform destroy
+	source secrets/set-env.sh && terraform destroy
 
 clean:
 	rm -f $(plan)