Gerrit commit message check for all projects

rules.pl

%filter to require all projects to have correct commit message
submit_filter(In, Out) :-
    %unpack the submit rule into a list of code reviews
    In =.. [submit | Ls],
    %add commit message validator
    require_commit_message_check(Ls, R),
    %pack the list back up and return it
    Out =.. [submit | R].

require_commit_message_check(S1, S2) :-
    gerrit:commit_message_matches('^US|CR#[A-Z]+-\\d+:\\s[\\w\\W]+'),
    !,
    S2 = [label('Commit-Message', ok(user(1000))) | S1].

require_commit_message_check(S1, S2) :-
    !,
    S2 = [label('Commit-Message', reject(user(1000))) | S1].