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

{
  home-manager = {
    sharedModules = [{
      programs.git = {
        enable = true;
        lfs.enable = true;
        signing = {
          signByDefault = true;
          key = null;
        };
        extraConfig.credential.helper = "store";
        hooks = let
          commit-msg-hook = pkgs.writeShellScriptBin "git-commit-msg" ''
            git interpret-trailers --if-exists doNothing --trailer \
              "Signed-off-by: $(git config user.name) <$(git config user.email)>" \
              --in-place "$1"
          '';
        in
        {
          commit-msg = "${commit-msg-hook}/bin/git-commit-msg";
        };
      };
    }];

    users = lib.attrsets.mapAttrs (user: config: ({
      programs.git = {
        userName = config.fullName;
        userEmail = config.email;
      };
    })) (lib.attrsets.filterAttrs (name: config: config.isNormalUser) config.users.users);
  };
}