Create Sublime completions file from elixir project

create_sublime_completions.ex

defmodule Mix.Tasks.CreateSublimeCompletions do
  use Mix.Task

  @moduledoc """
  Add this mix file to your project, update `@sublime_dir` and run it periodically to
  create a Sublime completions file to get fast code completion in Sublime for your Elixir project.
  """

  def run(_args) do
    create_completions_file()
  end

  @sublime_dir "/Users/adamkirk/Dropbox/symlinked/Sublime Text 3/Packages/User"

  def create_completions_file() do
    modules =
      Path.wildcard("lib/**/*.ex")
      |> Enum.filter(fn
        "lib/mix/tasks" <> _ -> false
        _ -> true
      end)
      |> Enum.map(& &1 |> File.read!())
      |> Enum.flat_map(fn contents ->
        Regex.scan(~r/defmodule (.*?) do/, contents)
        |> Enum.flat_map(fn [_, module] ->
          Regex.scan(~r/def (.*?)\(/, contents)
          |> Enum.map(fn [_, function] ->
            "#{module}.#{function}"
          end)
        end)
      end)
      |> Enum.uniq()

    File.write!(
      Path.join(@sublime_dir, "project-modules.sublime-completions"),
      %{
        scope: "source.elixir",
        completions: modules
      } |> Jason.encode!()
    )

  end
end