dotfiles/nix-conf/lib/serde/default.nix

# Takes care of serializing and deserializing to some formats
# Blame: Pegasust<pegasucksgg@gmail.com>
# TODO: Add to* formats from pkgs.formats.*
{
  pkgs,
  lib,
} @ inputs: let
  yamlToJsonDrv = yamlContent: outputPath:
    pkgs.callPackage
    ({runCommand}:
      # runCommand source: https://github.com/NixOS/nixpkgs/blob/master/pkgs/build-support/trivial-builders.nix#L33
        runCommand outputPath {
          inherit yamlContent;
          nativeBuildInputs = [pkgs.yq];
        }
        # run yq which outputs '.' (no filter) on file at yamlPath
        # note that $out is passed onto the bash/sh script for execution
        ''
          echo "$yamlContent" | yq >$out
        '')
    {};
in {
  # Takes in a yaml string and produces a derivation with translated JSON at $outputPath
  # similar to builtins.fromJSON, turns a YAML string to nix attrset
  fromYaml = yamlContent: builtins.fromJSON (builtins.readFile (yamlToJsonDrv yamlContent "any_output.json"));
  fromYamlPath = yamlPath:
    builtins.fromJSON (
      builtins.readFile (
        yamlToJsonDrv
        (
          builtins.readFile yamlPath
        )
        "any-output.json"
      )
    );
  fromTOML = builtins.fromTOML;
  fromJSON = builtins.fromJSON;
}