class Morecane::MustMatchCheck

def self.options
  {
    must_match_glob: ['Glob to run match checks over',
                      default:  '{app,lib,spec}/**/*.rb',
                      variable: 'GLOB',
                      clobber:  :no_must_match],
    must_match_regexp: ['Regexp to check files against',
                        variable: 'REGEXP',
                        clobber:  :no_must_match],
  }
end

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

def find_violations(file_name)
  data = ::File.open(file_name, 'r:utf-8').read
  if !data.match(opts.fetch(:must_match_regexp))
    {
      description: "Source file doesn't match regexp",
      file:        file_name
    }
  end
end

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