single_line_subject.rb

module Overcommit::Hook::CommitMsg
  # Ensures commit message subject lines are followed by a blank line.
  class SingleLineSubject < Base
    def run
      return :pass if empty_message?

      unless commit_message_lines[1].to_s.strip.empty?
        return :warn, 'Subject should be one line and followed by a blank line'
      end

      :pass
    end
  end
end