improve script compatibility (#677)

scripts/format.mk

@@ -6,5 +6,5 @@ export DOCKERFILE_FORMAT
 
 format:
 	echo "$$DOCKERFILE_FORMAT" | docker build -q . -f - -t temp
-	docker run --rm -it -v $(PWD):/s -w /s temp \
+	docker run --rm -it -v $(shell pwd):/s -w /s temp \
 	sh -c "gofumpt -l -w ."

scripts/lint.mk

@@ -1,5 +1,5 @@
 lint:
-	docker run --rm -v $(PWD):/app -w /app \
+	docker run --rm -v $(shell pwd):/app -w /app \
 	-e CGO_ENABLED=0 \
 	$(LINT_IMAGE) \
 	golangci-lint run -v

scripts/mod-tidy.mk

@@ -1,3 +1,3 @@
 mod-tidy:
-	docker run --rm -it -v $(PWD):/s -w /s $(BASE_IMAGE) \
+	docker run --rm -it -v $(shell pwd):/s -w /s $(BASE_IMAGE) \
 	sh -c "apk add git && GOPROXY=direct go mod tidy"