Add build step that checks commit fixup and DCO.

This is a transparent copy of the steps previously added to the
firecracker-containerd repo.

Signed-off-by: Erik Sipsma <[email protected]>

Author: sipsma

.buildkite/logcheck.sh

@@ -0,0 +1,51 @@
+#!/bin/sh
+# Copyright 2019 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.
+
+if [ -z "$BUILDKITE_PULL_REQUEST_BASE_BRANCH" ]; then
+    # only run on pull requests
+    exit 0
+fi
+
+found_fixups=0
+missing_dco=0
+
+for sha in $(git log --no-merges --pretty=%H --no-decorate \
+             "${BUILDKITE_PULL_REQUEST_BASE_BRANCH}"..HEAD); do
+    git show --pretty=oneline --no-decorate --no-patch $sha \
+      | fgrep -q 'fixup!' && {
+        found_fixups=1
+        echo "Found fixup commit $sha"
+    }
+
+    git show --pretty=medium --no-decorate --no-patch $sha \
+      | fgrep -q Signed-off-by: || {
+        missing_dco=1
+        echo "Missing DCO on $sha"
+    }
+done
+
+status=0
+if [ $found_fixups -gt 0 ]; then
+    status=1
+else
+    echo "Found no fixup commits"
+fi
+
+if [ $missing_dco -gt 0 ]; then
+    status=1
+else
+    echo "All commits have Signed-off-by signature"
+fi
+
+exit $status

.buildkite/pipeline.yml

@@ -33,6 +33,9 @@ steps:
   # multiple go builds are downloading to the same cache.
   - wait
 
+  - label: 'git log validation'
+    command: './.buildkite/logcheck.sh'
+
   - label: 'build'
     commands:
       - 'make'