nixcfg/modules/nixos/tools/git/default.nix

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

with lib;
with lib.metacfg;
let
  cfg = config.metacfg.tools.git;
  gpg = config.metacfg.security.gpg;
  user = config.metacfg.user;
in
{
  options.metacfg.tools.git = with types; {
    enable = mkBoolOpt false "Whether or not to install and configure git.";
    userName = mkOpt types.str user.fullName "The name to configure git with.";
    userEmail = mkOpt types.str user.email "The email to configure git with.";
    signingKey = mkOpt types.str "9762169A1B35EA68" "The key ID to sign commits with.";
  };

  config = mkIf cfg.enable {
    environment.systemPackages = with pkgs; [ git ];

    metacfg.home.extraOptions = {
      programs.git = {
        enable = true;
        inherit (cfg) userName userEmail;
        lfs = enabled;
        signing = {
          key = cfg.signingKey;
          signByDefault = mkIf gpg.enable true;
        };
        extraConfig = {
          init = {
            defaultBranch = "main";
          };
          pull = {
            rebase = true;
          };
          push = {
            autoSetupRemote = true;
          };
          core = {
            whitespace = "trailing-space,space-before-tab";
          };
          safe = {
            directory = "${user.home}/git";
          };
          "credential \"https://github.com\"" = {
            helper = "!gh auth git-credential";
          };
          alias = {
            co = "checkout";
            ci = "commit --signoff";
          };
          pull.ff = "only";
          core.pager = "${pkgs.delta}/bin/delta";
          delta = {
            features = "decorations";
            syntax-theme = "DarkNeon";
            light = "false";
            navigate = "true";
          };
          interactive.diffFilter = "${pkgs.delta}/bin/delta --color-only";
          merge.conflictStyle = "diff3";
          diff.colorMoved = "default";
          http.sslCAinfo = "/etc/ssl/certs/ca-certificates.crt";
          submodule.recurse = true;
        };
      };
    };
  };
}