test.exs config for branch specific db's

text.exs

git_branch =
  case System.cmd("git", ["rev-parse", "--abbrev-ref", "HEAD"]) do
    {branch, 0} -> String.trim(branch)
    _ -> ""
  end

db_suffix =
  if git_branch == "main" do
    ""
  else
    "_#{git_branch}"
    |> String.replace("/", "_")
    |> String.replace("-", "_")
    |> String.downcase()
  end

db_suffix = "#{db_suffix}#{System.get_env("MIX_TEST_PARTITION")}"

config :xyz, Xyz.Repo,
  username: "postgres",
  password: "postgres",
  hostname: "localhost",
  database: "xyz_test#{db_suffix}",
  pool: Ecto.Adapters.SQL.Sandbox,
  pool_size: System.schedulers_online() * 2