actual-nix/flake.nix

{
  description = "Actual budget app";

  inputs.nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";

  outputs = { self, nixpkgs }: let
    pkgs = import nixpkgs {
      system = "x86_64-linux";
    };
    pname = "actual-server";
    version = "24.5.0";
    src = pkgs.fetchFromGitHub {
      owner = "actualbudget";
      repo = pname;
      rev = "v${version}";
      sha256 = "sha256-DoaBtLIba4ojEUrfSShTOc3BMijONg8qg2MjJ0fdErQ=";
    };
    package = pkgs.stdenv.mkDerivation (finalAttrs: {
      inherit pname version src;

      nativeBuildInputs = with pkgs; [
        yarn-berry
        nodejs
        python3
        jq
        moreutils
        makeWrapper
      ];

      yarnOfflineCache = pkgs.stdenvNoCC.mkDerivation {
        name = "actual-deps";
        nativeBuildInputs = with pkgs; [ yarn-berry ];
        inherit (finalAttrs) src;

        NODE_EXTRA_CA_CERTS = "${pkgs.cacert}/etc/ssl/certs/ca-bundle.crt";

        supportedArchitectures = builtins.toJSON {
          os = [ "darwin" "linux" ];
          cpu = [ "arm" "arm64" "ia32" "x64" ];
          libc = [ "glibc" "musl" ];
        };

        configurePhase = ''
          runHook preConfigure

          export HOME="$NIX_BUILD_TOP"
          export YARN_ENABLE_TELEMETRY=0

          yarn config set enableGlobalCache false
          yarn config set cacheFolder $out
          yarn config set supportedArchitectures --json "$supportedArchitectures"

          runHook postConfigure
        '';

        buildPhase = ''
          runHook preBuild

          mkdir -p $out
          yarn install --immutable --mode skip-build

          runHook postBuild
        '';

        dontInstall = true;

        outputHashAlgo = "sha256";
        outputHash = "sha256-4bvWpy0/10jMpzWuFbFT3JRqpjqGCy24Dtbd1ZBWQ2k=";
        outputHashMode = "recursive";
      };

      patchPhase = ''
        sed -i '1i#!${pkgs.nodejs}/bin/node' app.js
      '';

      configurePhase = ''
        runHook preConfigure

        export HOME="$NIX_BUILD_TOP"
        export YARN_ENABLE_TELEMETRY=0
        export npm_config_nodedir=${pkgs.nodejs}

        yarn config set enableGlobalCache false
        yarn config set cacheFolder $yarnOfflineCache

        runHook postConfigure
      '';

      buildPhase = ''
        runHook preBuild

        yarn install --immutable --immutable-cache
        yarn build
        yarn workspaces focus --all --production

        runHook postBuild
      '';

      installPhase = ''
        runHook preInstall

        mkdir -p $out/{bin,lib}

        mkdir $out/lib/actual
        cp -r package.json app.js src migrations node_modules $out/lib/actual/

        chmod +x $out/lib/actual/app.js

        makeWrapper $out/lib/actual/app.js $out/bin/actual --chdir $out/lib/actual

        runHook postInstall
      '';

      fixupPhase = ''
        runHook preFixup

        patchShebangs $out/lib

        runHook postFixup
      '';
    });
  in rec {
    packages.x86_64-linux = {
      "${pname}" = package;
      default = package;
    };
    nixosModules.default = { lib, config, pkgs, ... }:
      with lib;
      let
        cfg = config.services.actual;
        dataDir = "/var/lib/actual";
        cfgFile = pkgs.writeText "actual.json" (builtins.toJSON {
          inherit dataDir;
          inherit (cfg) hostname port;
          serverFiles = "${dataDir}/server-files";
          userFiles = "${dataDir}/user-files";
        });
      in {
        options.services.actual = {
          enable = mkEnableOption "Actual budget server";
          hostname = mkOption { type = types.str; default = "127.0.0.1"; };
          port = mkOption { type = types.port; default = 5006; };
        };
        config = mkIf cfg.enable {
          users.users.actual = {
            name = "actual";
            group = "actual";
            isSystemUser = true;
          };

          users.groups.actual = {};

          systemd.services.actual-server = {
            description = "Actual budget server";
            documentation = [ "https://actualbudget.org/docs/" ];
            wantedBy = [ "multi-user.target" ];
            after = [ "networking.target" ];
            serviceConfig = {
              ExecStart = "${package}/bin/actual";
              Restart = "always";
              User = "actual";
              Group = "actual";
              PrivateTmp = true;
              StateDirectory = "actual";
            };
            environment.ACTUAL_CONFIG_PATH = "${cfgFile}";
          };
        };
      };
  };
}