nixos-config/nixos/modules/programs/git.nix

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

with lib;

let

  cfg = config.programs.custom.git;

in
{

  options.programs.custom.git.enable =
    mkEnableOption "install git and all its tools";

  config = mkIf cfg.enable {

    environment.systemPackages = with pkgs; [
      git
      tig
      lazygit
      git-crypt
      gitAndTools.gitflow
      gitAndTools.gitSVN
      gitAndTools.git2cl

      # merge tools
      meld

      # activate using :
      # git config --global core.pager "diff-so-fancy | less --tabs=4 -RFX"
      gitAndTools.diff-so-fancy
    ];
  };
}