clean-branchs.exs

valid_branchs = [
  "master"
]

"git"
|> System.cmd(["branch"])
|> elem(0)
|> String.split("\n")
|> Enum.map(&String.trim/1)
|> Enum.reject(&match?("", &1))
|> Enum.reject(&String.starts_with?(&1, "*"))
|> Enum.reject(&Enum.member?(valid_branchs, &1))
|> Enum.each(fn branch ->
  "git"
  |> System.cmd(["branch", "-D", branch])
  |> IO.inspect()
end)