tfnixstringescape.nix

  # Apply function to all strings in an attrset recursively through lists as well.
  mapStringsDeep =
    function: value:
    if builtins.isString value then
      function value
    else if builtins.isAttrs value then
      lib.mapAttrs (name: mapStringsDeep function) value
    else if builtins.isList value then
      map (mapStringsDeep function) value
    else
      value;

  # Escapes strings so variables aren't interpolated with ${} and %{}
  tfEscapeString =
    value:
    lib.replaceStrings
      [
        # Nix and tf shares this escape pattern
        "$$\{"
        # tf also interpolates %{}
        "%{"
      ]
      [
        "\${"
        "%%{"
      ]
      value;

  # Escape 
  escapeStringsDeep = attrs: mapStringsDeep tfEscapeString attrs;