{ lib, pkgs }:

with lib;

let self = {

  importYAML = path: importJSON (pkgs.runCommand "yaml-to-json" { } ''
    ${pkgs.remarshal}/bin/remarshal -i ${path} -if yaml -of json > $out
  '');

  toYAML = config: builtins.readFile (pkgs.runCommand "to-yaml" { } ''
    ${pkgs.remarshal}/bin/remarshal -i ${pkgs.writeText "to-json" (builtins.toJSON config)} -if json -of yaml > $out
  '');

  toMultiDocumentYaml = name: documents: pkgs.runCommand name { }
    (concatMapStringsSep "\necho --- >> $out\n"
      (d:
        "${pkgs.remarshal}/bin/remarshal -i ${builtins.toFile "doc" (builtins.toJSON d)} -if json -of yaml >> $out"
      )
      documents);

  toBase64 = value:
    builtins.readFile
      (pkgs.runCommand "value-to-b64" { } "echo -n '${value}' | ${pkgs.coreutils}/bin/base64 -w0 > $out");

  exp = base: exp: foldr (value: acc: acc * base) 1 (range 1 exp);

  octalToDecimal = value: (foldr
    (char: acc: {
      i = acc.i + 1;
      value = acc.value + (toInt char) * (self.exp 8 acc.i);
    })
    { i = 0; value = 0; }
    (stringToCharacters value)).value;
};
in self