os/programs/helix.nix

{config, lib, pkgs, inputs, ...} : {
  programs.helix = {
    enable        = true ;
    defaultEditor = true ;
    settings = {
      theme  = "horizon-dark" ;
      editor = {
        scrolloff                 = 4               ;
        auto-format               = true            ;
        auto-pairs                = false           ;
        color-modes               = true            ;
        lsp.snippets              = true            ;
        cursor-shape.insert       = "bar"           ;
        shell                     = [ "fish" "-c" ] ;
        idle-timeout              = 250             ;
        whitespace = {
          render.tab     = "all" ;
          characters.tab = "│"   ;
        } ;
        soft-wrap = {
          enable             = true ;
          wrap-at-text-width = true ;
        } ;
      } ;
      keys = {
        normal = {
        } ;
      } ;
    } ;
  };

  home.packages = let
    edit = (pkgs.writeShellApplication {
          name = "edit";
          text = ''
            CMND=$(cat <<'END'
              BUFFER_NAME=''$(echo -n "''$PWD" | xxd -ps -c 200 | tr -d '\n' | shasum | head -c -4)

              tmux -L "$BUFFER_NAME" has-session -t "$BUFFER_NAME" || {
                tmux -L "$BUFFER_NAME" new-session -d -s "$BUFFER_NAME" "BUFFER_NAME=$BUFFER_NAME EDITOR=wraphx lf"
                tmux -L "$BUFFER_NAME" set -g status off
                tmux -L "$BUFFER_NAME" set -g pane-border-style fg=#0c0c0c
                tmux -L "$BUFFER_NAME" set -g pane-active-border-style "bg=default fg=#0c0c0c"
              }

              tmux -L "$BUFFER_NAME" attach -t "$BUFFER_NAME"
            END
            )

            if [ -f "shell.nix" ] && [ -z ''${IN_NIX_SHELL+x} ]; then
              nix-shell --command "$CMND"
            else
              eval "$CMND"
            fi
          '';
      });
      wraphx = (pkgs.writeShellApplication {
          name = "wraphx";
          text = ''
            test "$(tmux -L "$BUFFER_NAME" list-panes | wc -l)" -eq 1 && {
              tmux -L "$BUFFER_NAME" split-window -h hx "$1"
            }
          '';
      });
    in [ edit wraphx ];

}