Add commit linting

- add gommit configuration
- add wrapper script

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

.gommit.toml

@@ -0,0 +1,23 @@
+[config]
+exclude-merge-commits=true
+check-summary-length=true
+summary-length=50
+
+[matchers]
+all='^(?:(?:Add|Remove|Update|Enable|Disable) |(?:role\.\w+|profile\.\w+): )[\w ]+\n(?:(?:\n\- .*)+\n)?(?:\nSigned-off-by: \w+ \w+ <.*@.*>)'
+
+[examples]
+summary_variant_one="""
+[Add|Remove|Update|Enable|Disable] this and that
+"""
+
+summary_variant_two="""
+[role.$role|profile.$profile]: this and that
+"""
+
+body_message="""
+- an optional body line
+- another optional body line
+
+Signed-off-by: Max Mandatory <required@example.com>
+"""

bin/lint-commits.pl

@@ -0,0 +1,39 @@
+#!/usr/bin/perl
+#
+#   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.
+#
+use v5.26;
+
+my ($branch_main) = @ARGV;
+
+if(!$branch_main){
+        $branch_main = "master"
+}
+
+`git ls-remote origin $branch_main` =~ /([a-f0-9]{40})/;
+
+my $refHead = `git rev-parse HEAD`;
+my $refTail = $1;
+
+chomp($refHead);
+chomp($refTail);
+
+if ($refHead eq $refTail) {
+    exit 0;
+}
+
+system "gommit check range $refTail $refHead";
+
+if ($? > 0) {
+    exit 1;
+}