class Morecane::MustNotMatchCheck

def self.options
  {
    must_not_match_glob: ['Glob to run no-match checks over',
                          default:  '{app,lib,spec}/**/*.rb',
                          variable: 'GLOB',
                          clobber:  :no_must_not_nomatch],
    must_not_match_regexp: ['Regexp to check files against',
                            variable: 'REGEXP',
                            clobber:  :no_must_not_match],
  }
end

def file_names
  Dir[opts.fetch(:must_not_match_glob)]
end

def find_violations(file_name)
  data = ::File.open(file_name, 'r:utf-8').read
  if data.match(opts.fetch(:must_not_match_regexp))
    {
      description: "Source file matches regexp",
      file:        file_name
    }
  end
end

def violations
  file_names.map { |file_name|
    find_violations(file_name)
  }.flatten.compact
end