Today I wanted to activate this rule. The cop for this is actually straight forward, you don’t want to add/write script permissions inside your scripts. We have a Rakefile in our application, as any good standard Ruby on Rails application has. And at the top of the file, this is written:  #!/usr/bin/env rake

There is a problem with adding this, namely that your system will use whatever rake is defined, and not necessarily the one you had in mind or configured through your Gemfile or Bundler. That’s why it’s better to NOT include these lines in your script, and make sure the script is actually executable when it needs to be, or you’re using the right commands to do so like bundle exec rake my_script.

Now why doesn’t it make sense to add this as well? The cop kind of gives it away. The error message is that the file doesn’t have any execute permissions, which honestly it should not have in the first place. Rake is running and needs to be executable, but your Rakefile is the script being parsed by Rake. At least that’s how I understand it. I’ve never had to set execute permissions on this file before.

The current Ruby on Rails master branch doesn’t have this entry in it either, perhaps older versions used to have this, but seeing as this is not required anymore, I opted to activate this rule AND remove the line from our Rakefile​.