defmodule GitStatus do
  require Logger

  @commit (case System.cmd("git", ["rev-parse", "HEAD"]) do
             {hash, 0} ->
               String.trim(hash)

             _ ->
               Logger.warn("Could not read git commit hash")
               "UNKNOWN"
           end)

  @is_clean (case System.cmd("git", ["status", "--porcelain"]) do
               {"", 0} ->
                 true

               {_, 0} ->
                 false

               {_, _} ->
                 Logger.warn("Could not read git status")
                 false
             end)

  @doc """
  The git commit hash read at compile time, if present
  """
  def commit(), do: @commit

  @doc """
  Returns if the commit value included all source code at build time.
  """
  def is_clean?(), do: @is_clean
end