If the DCO check is run on an empty branch (ie one which has no commits
different from master), it throws an error due to trying to interpret
the empty string as a git commit SHA.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
This introduces a CI job for validating DCO sign-off in every commit
message. The CI jobs are not provided any information on what the
baseline commit for the branch was. We can't compare against the forked
repo's master branch, as there's no guarantee the user is keeping master
up2date in their fork. Thus we add the master upstream repo as a git
remote and identify the common ancestor.
Reviewed-by: Andrea Bolognani <abologna@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
