{ pkgs, lib, config, ... }:

let
  inherit (config.networking) domain;
  root = "/var/git";
in {
  services = {
    gitolite = {
      enable = true;
      enableGitAnnex = true;
      dataDir = root;
      user = "git";
      group = "git";
      # the umask is necessary to give the git group read permissions, otherwise
      # git-daemon et al can't access the repos
      extraGitoliteRc = ''
        $RC{SITE_INFO} = 'a computer is a bicycle for the mind.';
        $RC{UMASK} = 0027;
      '';
      adminPubkey = lib.trivial.pipe ../Keys/Ben.pub [
        builtins.readFile
        (lib.strings.splitString "\n")
        lib.lists.head
      ];
      # TODO: this is broken
      # commonHooks = [ ./git-hooks ];
    };
    gitDaemon = {
      enable = true;
      basePath = "${root}/repositories";
      listenAddress = "simatime.com";
      user = "gitDaemon";
      group = "gitDaemon";
    };
    nginx.virtualHosts.${domain}.cgit = {
      enable = true;
      location = "/git";
      virtual-root = "/git";
      css = "/git/cgit.css";
      logo = "/git/cgit.png";
      root-title = "ben's git repos";
      root-desc = "building";
      enable-git-config = 1;
      clone-url = lib.strings.concatStringsSep " " [
        "https://$HTTP_HOST/git/$CGIT_REPO_URL"
        "git://$HTTP_HOST/$CGIT_REPO_URL"
        "git@$HTTP_HOST:$CGIT_REPO_URL"
      ];
      include = [
        # these depend on order, scan-path must come last
        (builtins.toFile "cgitrc" ''
          strict-export=git-daemon-export-ok
          scan-path=${root}/repositories
        '')
      ];
    };
  };
  # need to specify that these users can access git files by being part of the
  # git group
  users.users = {
    gitDaemon = {
      isSystemUser = true;
      description = "Git daemon user";
      extraGroups = [ "git" ];
    };
    "nginx".extraGroups = [ "git" ];
  };
  users.groups = {
    gitDaemon = {};
  };
}