nixos/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}/${custom-theme-name}-theme.el";
    in ''
      (add-to-list 'custom-theme-load-path "${custom-theme}")
      (add-to-list 'custom-safe-themes "${custom-theme-hash}")
      (load-theme '${custom-theme-name})
    '';
    extraPackages = epkgs:
      with epkgs;
        [
          # Tree-sitter grammars, not a real Emacs package
          treesit-grammars.with-all-grammars
          # Maildir utils with linked Emacs package
          mu4e
        ]
        ++ (import ./emacs-packages.nix epkgs);
  };
  home.packages = with pkgs; [
    # Emacs requirements
    imagemagick
    languagetool
    wordnet
    graphviz # For org-roam graph
    mp3info # For EMMS

    # Language-specific requirements
    sqlite
    pandoc
    ghostscript
    poppler_utils

    # Customised LaTeX install
    (texlive.combine
      {inherit (pkgs.texlive) scheme-medium dvisvgm dvipng wrapfig amsmath ulem hyperref capt-of;})
    python3Packages.pygments

    # Development tools
    ## Code screenshots
    silicon

    ## Linters
    shellcheck
    yamllint
    nodePackages.eslint

    ## Formatters
    alejandra
    shfmt
    ruff
    black
    isort
    stylua
    nodePackages.prettier

    ## Language servers
    nil # Nix lsp
    lua-language-server
    nodePackages.pyright
    nodePackages.typescript-language-server

    ## Interpreters
    (python3.withPackages
      (ps: with ps; [tkinter 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;
  };
}