Add "lint" target to check Amazon's license header

There are multiple files we forgot to add Amazon's license header.
This change adds a new Makefile targat that check all files to make
sure the header is included.

Signed-off-by: Kazuyoshi Kato <katokazu@amazon.com>

Author: Kazuyoshi Kato

.buildkite/pipeline.yml

@@ -55,13 +55,6 @@ steps:
 
   - wait
 
-  - label: gofmt -s
-    command: test -z $(gofmt -s -l .)
-    # This should run in the same queue, but we don't care whether it runs on
-    # the same host.
-    agents:
-      queue: "${BUILDKITE_AGENT_META_DATA_QUEUE:-default}"
-
   - label: 'git log validation'
     command: './.buildkite/logcheck.sh'
     # This should run in the same queue, but we don't care whether it runs on
@@ -92,6 +85,13 @@ steps:
 
   - wait
 
+  - label: lint
+    command: make lint
+    agents:
+      queue: "${BUILDKITE_AGENT_META_DATA_QUEUE:-default}"
+      distro: "${BUILDKITE_AGENT_META_DATA_DISTRO}"
+      hostname: "${BUILDKITE_AGENT_META_DATA_HOSTNAME}"
+
   - label: 'build'
     commands:
       - 'make'

.headers/go.txt

@@ -0,0 +1,12 @@
+// Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License"). You may
+// not use this file except in compliance with the License. A copy of the
+// License is located at
+//
+//	http://aws.amazon.com/apache2.0/
+//
+// or in the "license" file accompanying this file. This file 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.

.headers/makefile.txt

@@ -0,0 +1,12 @@
+# Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License"). You may
+# not use this file except in compliance with the License. A copy of the
+# License is located at
+#
+# 	http://aws.amazon.com/apache2.0/
+#
+# or in the "license" file accompanying this file. This file 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.

Makefile

@@ -31,7 +31,14 @@ arch=$(shell uname -m)
 
 # The below files are needed and can be downloaded from the internet
 release_url=https://github.com/firecracker-microvm/firecracker/releases/download/$(firecracker_version)/firecracker-$(firecracker_version)-$(arch).tgz
-testdata_objects = $(FC_TEST_DATA_PATH)/vmlinux $(FC_TEST_DATA_PATH)/root-drive.img $(FC_TEST_DATA_PATH)/jailer $(FC_TEST_DATA_PATH)/firecracker
+
+testdata_objects = \
+$(FC_TEST_DATA_PATH)/vmlinux \
+$(FC_TEST_DATA_PATH)/root-drive.img \
+$(FC_TEST_DATA_PATH)/jailer \
+$(FC_TEST_DATA_PATH)/firecracker \
+$(FC_TEST_DATA_PATH)/ltag
+
 testdata_dir = testdata/firecracker.tgz testdata/firecracker_spec-$(firecracker_version).yaml testdata/LICENSE testdata/NOTICE testdata/THIRD-PARTY
 
 # --location is needed to follow redirects on github.com
@@ -78,6 +85,10 @@ $(FC_TEST_DATA_PATH)/fc.stamp:
 $(FC_TEST_DATA_PATH)/root-drive.img:
 	$(curl) -o $@ https://s3.amazonaws.com/spec.ccfc.min/img/hello/fsfiles/hello-rootfs.ext4
 
+$(FC_TEST_DATA_PATH)/ltag:
+	GO111MODULE=off GOBIN=$(abspath $(FC_TEST_DATA_PATH)) \
+	go get github.com/kunalkushwaha/ltag
+
 tools/firecracker-builder-stamp: tools/docker/Dockerfile
 	docker build \
 		-t localhost/$(FIRECRACKER_BUILDER_NAME):$(DOCKER_IMAGE_TAG) \
@@ -112,4 +123,8 @@ firecracker-clean:
 		cargo clean
 	- rm $(FIRECRACKER_BIN) $(JAILER_BIN)
 
+lint: deps
+	gofmt -s -l .
+	$(FC_TEST_DATA_PATH)/ltag -check -v -t .headers
+
 .PHONY: all generate clean distclean build test unit-tests all-tests check-kvm