title: Flake8 - how to exclude all files from a project by listing every file?
body: <p>I am setting up <code>flake8</code> on a legacy Python code base. My idea was to explicitly list the names of all the <code>.py</code> files present in a form similar to this: </p>
  
  <pre><code>[flake8]
  files_to_ignore = 
    foo.py,
    bar.py,
    spam.py
  </code></pre>
  
  <p>Then, when running <code>flake8</code> on the project, it will pass because there are no files to be run on. Then we fix a single file and exclude it from the list which means it will be checked by the linter. Then process repeats for each existing file.</p>
  
  <p>However, I cannot see any way to exclude all files by listing them explicitly from reading the docs. There is <code>--exclude=&lt;patterns&gt;</code> but this will ignore all files (I won't be able to filter files by names).</p>
  
  <p>I have found that it is possible to ignore the whole file by adding a line <code># flake8: noqa</code> on an empty line. Is it my only choice to achieve what I want?</p>