{ config, pkgs, ... }: {
  # Configure BASH exports
  # https://nix-community.github.io/home-manager/options.html

  # https://github.com/justjanne/powerline-go
  # https://nix-community.github.io/home-manager/options.html#opt-programs.powerline-go.enable 
  programs.powerline-go = { 
    enable = true;
    # https://github.com/justjanne/powerline-go#customization 
    settings = { 
      hostname-only-if-ssh = true;
      cwd-max-depth = 1;
      condensed = true;
      # valid choices: default, low-contrast, gruvbox, solarized-dark16, solarized-light16
      theme = "gruvbox";
     };
    modules = [ 
      "venv"
      "user"
      "host"
      "ssh"
      "cwd"
      "nix-shell"
      "perms"
      "git"
      "docker"
      "exit"
      "root"
    ];
  };

  programs = {
    bash = {
      enable = true;
      enableCompletion = true;
      initExtra = ''
        GPG_TTY=$(tty)
        ssh-add
      '';
      sessionVariables = {
        # Set the GTK Theme
        # GTK_THEME = "Gruvbox-Dark-BL";
        XDG_DATA_HOME = "$HOME/.local/share";
        # Disable askpass for cli auth:
        # SSH_ASKPASS = "";
      };
      bashrcExtra = ''
        # Build ISOs/SD Card Images
        nixos-build-all-images() {
          nixos-build-linode-img
          nixos-build-console
          nixos-build-desktop
        }
        nixos-build-pi-img() {
          pushd /etc/nixos/git 
          git pull 
          nix build .#imageConfigurations.nixos-rpi4-img
          popd
        }
        nixos-build-linode-img() {
          pushd /etc/nixos/git 
          git pull 
          nix build .#imageConfigurations.nixos-linode-img
          cp result/nixos.img.gz ~/nixos-linode-`ddate`-`git rev-parse HEAD | cut -b 1-7`.img.gz
          rm -f result
          popd
        }
        nixos-build-console() {
          pushd /etc/nixos/git
          git pull 
          nix build .#imageConfigurations.nixos-iso-console
          cp result/iso/nixos.iso ~/nixos-console-`ddate`-`git rev-parse HEAD | cut -b 1-7`.iso
          rm -f result
          popd
        }
        nixos-build-desktop() {
          pushd /etc/nixos/git
          git pull 
          nix build .#imageConfigurations.nixos-iso-desktop
          cp result/iso/nixos.iso ~/nixos-desktop-`ddate`-`git rev-parse HEAD | cut -b 1-7`.iso
          rm -f result
          popd
        }

        # NixOS Related
        nix-clean-all() {
          sudo nix-env -u --always
          sudo nix-collect-garbage -d
        }

        # Update SOPS Secrets
        install-secrets() {
          pushd /etc/nixos/git 
          nix develop -c update-repo 
          popd
        }
        update-repo() {
          for i in $(ls secrets); do 
            echo "Updateing secrets/$i"
            sops updatekeys secrets/$i -y
          done
        }
      '';
      shellAliases = {
        # nVidia prime selector alias:
        prime-select = "nvidia-offload";

        # Don't use X to open emacs
        emacs  = "emacs -nw";

        # docker
        d  = "docker";
        dc = "docker-compose";
        de = "docker exec -it";

        # bash / system
        ls  = "exa";
        cp  = "rsync -avr";
        ll  = "exa -lah";
        rm  = "rm -i";
        df  = "duf";
        cat = "bat";
        
        # git
        g   = "git";
        ga  = "git add -A";
        gb  = "git branch";
        gc  = "git commit";
        gca = "git commit -a";
        gco = "git checkout";
        gd  = "git diff";
        gp  = "git pull --prune";
        gpu = "git push origin HEAD";
        gs  = "git status -sb";

        # time / date
        tdate = "date +%Y.%m.%d..%H.%M";
        ttime = "date +%H.%M";
        ddate = "date +%Y.%m.%d";
        dday  = "date +%A";

        # nixos-rebuild
        ns  = "nix shell";
        nr  = "sudo nixos-rebuild";
        nrs = "sudo nixos-rebuild --upgrade switch";
        nrt = "sudo nixos-rebuild test";
        nrb = "sudo nixos-rebuild build";

        # Rebuild everything
        rebuild-home = "git -C /etc/nixos/git pull && home-manager switch -b backup --flake /etc/nixos/git";
        rebuild-host = "git -C /etc/nixos/git pull && sudo nixos-rebuild switch --flake /etc/nixos/git";
        rebuild-all  = "rebuild-host && rebuild-home";
        rebuild-host-remote = "git -C /etc/nixos/git pull && sudo nixos-rebuild switch --flake /etc/nixos/git -j0";
        rebuild-home-remote = "git -C /etc/nixos/git pull && home-manager switch -b backup --flake /etc/nixos/git --max-jobs 0";
        rebuild-all-remote  = "rebuild-host-remote && rebuild-home-remote";
      };
    };
  };
}