Credo.Sources.find_in_dir

You're seeing just the function find_in_dir, go back to Credo.Sources module for more information.
Link to this function

find_in_dir(working_dir, included, excluded)

View Source

Finds sources in a given directory using a list of included and excluded patterns. For included, patterns can be file paths, directory paths and globs. For excluded, patterns can also be specified as regular expressions.

iex> Sources.find_in_dir("/home/rrrene/elixir", ["*.ex"], ["not_me.ex"])

iex> Sources.find_in_dir("/home/rrrene/elixir", ["*.ex"], [~r/messy/])