end.compact
ruby_files = files.select do |file|
- file =~ /\.rb$/ || (file !~ /\.erb$/ && `file --brief --mime-type #{file}` == "text/x-ruby\n")
+ file =~ /\.rb$/ || (file !~ /\.erb$/ && %x(file --brief --mime-type #{file}) == "text/x-ruby\n")
end
ok &&= system("bundle", "exec", "rubocop", *ruby_files) unless ruby_files.empty?