home-manager/modules/programs/mergiraf.nix

{
  pkgs,
  config,
  lib,
  ...
}:
let
  inherit (lib)
    mkEnableOption
    mkPackageOption
    mkIf
    maintainers
    ;
  cfg = config.programs.mergiraf;
  mergiraf = "${cfg.package}/bin/mergiraf";
in
{
  meta.maintainers = [ maintainers.bobvanderlinden ];

  options = {
    programs.mergiraf = {
      enable = mkEnableOption "mergiraf";
      package = mkPackageOption pkgs "mergiraf" { };
    };
  };

  config = mkIf cfg.enable {
    home.packages = [ cfg.package ];

    programs.git = {
      attributes = [ "* merge=mergiraf" ];
      settings = {
        merge = {
          mergiraf = {
            name = "mergiraf";
            driver = "${mergiraf} merge --git %O %A %B -s %S -x %X -y %Y -p %P -l %L";
          };
          conflictStyle = "diff3";
        };
      };
    };
  };
}