nixos/system/home/emacs/default.nix

{
  config,
  pkgs,
  fonts,
  ...
}:
{
  imports = [ ../shell/default.nix ];
  services.emacs = {
    enable = true;
    package = config.programs.emacs.finalPackage;
    defaultEditor = true;
    client.enable = true;
    socketActivation.enable = true;
    startWithUserSession = false;
  };
  programs.emacs = {
    # Clone emacs config from https://git.xenia.me.uk/pixelifytica/emacs.git
    # git clone https://git.xenia.me.uk/pixelifytica/emacs.git ~/.emacs.d
    enable = true;
    package = pkgs.emacs29-pgtk;
    extraConfig =
      let
        fixed-font-family = "${fonts.monospace.name}";
        variable-font-family = "${fonts.sansSerif.name}";
        font-height = builtins.toString (builtins.floor (builtins.mul fonts.sizes.applications 10));
        custom-theme-name = "nix";
        custom-theme = pkgs.writeTextFile {
          name = "custom-emacs-theme";
          destination = "/${custom-theme-name}-theme.el";
          text = ''
            (deftheme ${custom-theme-name}
              "Use Nix customised fonts for main faces")

            (custom-theme-set-variables
              '${custom-theme-name}
              '(menu-bar-mode nil))

            (custom-theme-set-faces
             '${custom-theme-name}
             '(default ((t (:family "${fixed-font-family}" :height ${font-height}))))
             '(fixed-pitch ((t (:family "${fixed-font-family}"))))
             '(fixed-pitch-serif ((t (:family "${fixed-font-family}"))))
             '(variable-pitch ((t (:family "${variable-font-family}")))))

            (provide-theme '${custom-theme-name})
          '';
        };
        custom-theme-hash = builtins.hashFile "sha256" "${custom-theme}/${custom-theme-name}-theme.el";
      in
      ''
        (add-to-list 'default-frame-alist '(alpha-background . 85))
        (add-to-list 'custom-theme-load-path "${custom-theme}")
        (add-to-list 'custom-safe-themes "${custom-theme-hash}")
        (load-theme '${custom-theme-name})
      '';
    extraPackages =
      epkgs: with epkgs; [
        treesit-grammars.with-all-grammars
        mu4e
        emacsql-sqlite
      ];
  };
  home.packages = with pkgs; [
    # Emacs requirements
    imagemagick
    languagetool
    wordnet

    # Plugin requirements
    gcc
    sqlite
    pandoc
    ghostscript
    poppler_utils
    graphviz
    mp3info

    # Customised LaTeX install
    (texlive.combine {
      inherit (texlive)
        scheme-medium
        dvisvgm
        dvipng
        wrapfig
        amsmath
        ulem
        hyperref
        capt-of
        listings
        ;
    })

    # Development tools
    ## Code screenshots
    silicon

    ## Python Environments
    uv
    poetry

    ## Linters
    shellcheck
    yamllint
    ruff
    nodePackages.eslint

    ## Formatters
    nixfmt-rfc-style
    shfmt
    stylua
    nodePackages.prettier

    ## Language servers
    nixd
    lua-language-server
    nodePackages.typescript-language-server

    ## Interpreters
    (python3.withPackages (
      ps: with ps; [
        tkinter
        python-lsp-server
        mypy
        numpy
        scipy
        xarray
        matplotlib
      ]
    ))
    (luajit.withPackages (ps: [ (ps.callPackage ./luarocks/scilua.nix { }) ]))
  ];
  xdg.configFile = {
    "ruff/pyproject.toml".source = ./ruff.toml;
    "pypoetry/config.toml".source = ./pypoetry.toml;
  };
}