CI: Perform basic checks on PR commits.

Use the new "checkcommits" program in the "tests" repository
to perform basic checks on PR commits, such as:

- Subject
  - Contains a subsystem.
  - Length is within prescribed limits.

- Body
  - Contains a "Fixes #XXX" comment.
  - Line lengths are within prescribed limits.

Unlike the original implementation (#873), "checkcommits" should
be more robust.

Fixes #872.

Signed-off-by: James O. D. Hunt <[email protected]>

.ci/ci-pre-checks.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+#  This file is part of cc-oci-runtime.
+#
+#  Copyright (C) 2017 Intel Corporation
+#
+#  This program is free software; you can redistribute it and/or
+#  modify it under the terms of the GNU General Public License
+#  as published by the Free Software Foundation; either version 2
+#  of the License, or (at your option) any later version.
+#
+#  This program is distributed in the hope that it will be useful,
+#  but WITHOUT ANY WARRANTY; without even the implied warranty of
+#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#  GNU General Public License for more details.
+#
+#  You should have received a copy of the GNU General Public License
+#  along with this program; if not, write to the Free Software
+#  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+#---------------------------------------------------------------------
+# Description: Perform basic checks on the branch before attempting
+#   to run the build and test suites. If this script fails, the CI run
+#   will be aborted.
+#---------------------------------------------------------------------
+
+repo="github.com/clearcontainers/tests/cmd/checkcommits"
+go get -d "$repo"
+(cd "$GOPATH/src/$repo" && make)
+checkcommits \
+    --need-fixes \
+    --need-sign-offs \
+    --body-length 72 \
+    --subject-length 75 \
+    --verbose

.ci/ci-setup.sh

@@ -22,6 +22,10 @@ set -e -x
 root=$(cd `dirname "$0"`/..; pwd -P)
 source "$root/versions.txt"
 
+# Run checks on commit meta-data before attempting to run the build
+# and test phases.
+$(dirname "$0")/ci-pre-checks.sh
+
 if [ "$SEMAPHORE" = true ]
 then
     # SemaphoreCI has different environments that builds can run in. The