{ lib, pkgs, ... }: {
  networking = {
    firewall.allowedTCPPorts = [
      # nginx
      80
      443
    ];
  };

  security.acme = {
    defaults.email = "acme@fcuny.net";
    acceptTerms = true;
  };

  # FIXME: I also ran the following as the git user:
  # git config --global init.defaultBranch main
  # to ensure that new repositories are created with the default
  # branch set to `main'.
  # TODO(fcuny): I could create the configuration file to set the default branch
  services.gitolite = {
    enable = true;
    adminPubkey =
      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINBkozy+X96u5ciX766bJ/AyQ3xm1tXZTIr5+4PVFZFi";
    user = "git";
    group = "git";
    extraGitoliteRc = ''
      # Make dirs/files group readable, needed for webserver/cgit. (Default
      # setting is 0077.)
      $RC{UMASK} = 0027;
      $RC{GIT_CONFIG_KEYS} = 'cgit.desc cgit.hide cgit.ignore cgit.owner cgit.section';
      $RC{LOCAL_CODE} = "$rc{GL_ADMIN_BASE}/local";
      push( @{$RC{ENABLE}}, 'symbolic-ref' );
    '';
  };

  services.cgit.main = {
    enable = true;
    package = pkgs.cgit-pink;
    user = "git";
    group = "git";
    nginx.virtualHost = "git.fcuny.net";
    scanPath = "/var/lib/gitolite/repositories";
    settings = {
      css = "/cgit.css";
      logo = "/cgit.png";
      favicon = "/favicon.ico";
      readme = ":README.md";
      project-list = "/var/lib/gitolite/projects.list";
      about-filter = "${pkgs.cgit-pink}/lib/cgit/filters/about-formatting.sh";
      source-filter =
        "${pkgs.cgit-pink}/lib/cgit/filters/syntax-highlighting.py";
      clone-url =
        (lib.concatStringsSep " " [ "https://git.fcuny.net/$CGIT_REPO_URL" ]);
      enable-log-filecount = 1;
      enable-log-linecount = 1;
      enable-git-config = 1;
      enable-blame = 1;
      enable-commit-graph = 1;
      enable-follow-links = 1;
      enable-index-links = 1;
      enable-remote-branches = 1;
      enable-subject-links = 1;
      enable-tree-linenumbers = 1;
      max-atom-items = 108;
      max-commit-count = 250;
      max-repo-count = 500;
      repository-sort = "age";
      snapshots = "tar.gz";
      root-title = "¯\\_(ツ)_/¯";
      root-desc = "source code of my various projects";
    };
  };

  services.nginx = {
    enable = true;

    recommendedProxySettings = true;
    recommendedGzipSettings = true;
    recommendedOptimisation = true;
    recommendedTlsSettings = true;

    virtualHosts = {
      "fcuny.net" = {
        forceSSL = true;
        enableACME = true;
        locations = {
          "/" = { root = "/srv/www/fcuny.net"; };
          "/.well-known/acme-challenge" = {
            root = "/var/lib/acme/acme-challenges";
          };
        };
      };
      "git.fcuny.net" = {
        # make cgit the default site: if a request goes through nginx
        # without a host header, this will be the default site we serve
        # for that request.
        default = true;
        forceSSL = true;
        enableACME = true;
        locations = {
          "/.well-known/acme-challenge" = {
            root = "/var/lib/acme/acme-challenges";
          };
        };
      };
    };
  };

  services.restic.backups.git = {
    user = "fcuny";
    passwordFile = "/etc/restic.pw";
    repository = "/srv/backups/git";
    initialize = true;
    paths = [ "/var/lib/gitolite" ];
    exclude = [ "/var/lib/gitolite/.bash_history" "/var/lib/gitolite/.ssh" ];
    extraBackupArgs = [ "--exclude-caches" "--compression=max" ];
    timerConfig = { OnCalendar = "*:0/30"; };
    pruneOpts = [
      "--keep-hourly 36"
      "--keep-daily 7"
      "--keep-weekly 4"
      "--keep-monthly 3"
    ];
  };
}