Avoid grep errors in clean-unnecessary-docker (#1089)

When `make clean-unnecessary-docker` is run twice, or when there are no docker images tagges as "<none>", make fails because grep fails: ``` Deleting unnecessary container(s)... Deleting unnecessary image(s)... make: *** [Makefile:562: clean-unnecessary-docker] Error 1 ``` Using `awk` to _also_ search for "<none>", instead of `grep`, solves this issue.
openmaptiles · Mar 16, 2021 · 2943e9d · 2943e9d
1 parent fadc4a3
commit 2943e9d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/Makefile b/Makefile
@@ -559,7 +559,7 @@ clean-unnecessary-docker:
 	@echo "Deleting unnecessary container(s)..."
 	@docker ps -a -q --filter "status=exited" | $(XARGS) docker rm
 	@echo "Deleting unnecessary image(s)..."
-	@docker images | grep \<none\> | awk -F" " '{print $$3}' | $(XARGS) docker rmi
+	@docker images | awk -F" " '/<none>/{print $$3}' | $(XARGS) docker rmi
 
 .PHONY: test-perf-null
 test-perf-null: init-dirs