From 5277aa609f3acdda28c69a698b88aff278b4774d Mon Sep 17 00:00:00 2001
From: Oscar Utbult <oscar.utbult@gmail.com>
Date: Sun, 10 Jul 2022 19:13:50 +0200
Subject: [PATCH] Add Dockerfile linter

---
 Makefile                       |  1 +
 scripts/ci-lint-dockerfiles.sh | 26 ++++++++++++++++++++++++++
 2 files changed, 27 insertions(+)
 create mode 100755 scripts/ci-lint-dockerfiles.sh

diff --git a/Makefile b/Makefile
index ec2f01ce3c80..764f42358b31 100644
--- a/Makefile
+++ b/Makefile
@@ -443,6 +443,7 @@ lint: $(GOLANGCI_LINT) ## Lint the codebase
 	$(GOLANGCI_LINT) run -v $(GOLANGCI_LINT_EXTRA_ARGS)
 	cd $(TEST_DIR); $(GOLANGCI_LINT) run -v $(GOLANGCI_LINT_EXTRA_ARGS)
 	cd $(TOOLS_DIR); $(GOLANGCI_LINT) run -v $(GOLANGCI_LINT_EXTRA_ARGS)
+	./scripts/ci-lint-dockerfiles.sh
 
 .PHONY: lint-fix
 lint-fix: $(GOLANGCI_LINT) ## Lint the codebase and run auto-fixers if supported by the linter
diff --git a/scripts/ci-lint-dockerfiles.sh b/scripts/ci-lint-dockerfiles.sh
new file mode 100755
index 000000000000..3a87d57a989d
--- /dev/null
+++ b/scripts/ci-lint-dockerfiles.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Copyright 2022 The Kubernetes Authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+FILES=$(find -- * -name Dockerfile)
+while read -r file; do
+  echo "Linting: ${file}"
+  # Configure the linter to only fail for errors. Can be set to: error | warning | info | style | ignore | none
+  docker run --rm -i ghcr.io/hadolint/hadolint:v2.10.0 hadolint --failure-threshold error - < "${file}"
+done <<< "${FILES}"