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path: root/modules/emacs/default.nix
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{
  config,
  inputs,
  lib,
  pkgs,
  ...
}:
with lib;
let
  cfg = config.nixfiles.modules.emacs;
in
{
  options.nixfiles.modules.emacs.enable = mkEnableOption "GNU Emacs";

  config = mkIf cfg.enable {
    secrets.authinfo = {
      file = "${inputs.self}/secrets/authinfo";
      owner = my.username;
    };

    nixfiles.modules = {
      common.xdg.defaultApplications.emacsclient = [
        "application/atom+xml"
        "application/json"
        "application/rss+xml"
        "application/schema+json"
        "application/xhtml+xml"
        "application/xml"
        "text/csv"
        "text/plain"
      ];
      git.client.enable = true;
      gnupg.enable = true;
      password-store.enable = true;
      profiles.dev.enable = true;
      profiles.email.enable = true;
    };

    hm = {
      stylix.targets.emacs.enable = false;

      xdg.configFile =
        mapAttrs
          (
            _: value:
            value
            // {
              onChange = with config.hm.programs; ''
                export EMACSDIR="''${XDG_CONFIG_HOME:-$HOME/.config}/emacs"
                export DOOMDIR="''${XDG_CONFIG_HOME:-$HOME/.config}/doom"

                if [[ ! -d "$EMACSDIR/.git" ]]; then
                  ${getExe git.package} clone --depth=1 --branch=master \
                    "https://github.com/doomemacs/doomemacs" "$EMACSDIR"
                fi

                if [[ ! -d "$DOOMDIR/snippets" ]]; then
                  mkdir -p "$DOOMDIR/snippets"
                fi

                if [[ -x "$EMACSDIR/bin/doom" ]]; then
                  if [[ ! -d "$EMACSDIR/.local" ]]; then
                    PATH="''${PATH:-/bin}:${emacs.package}/bin:${git.package}/bin" \
                      "$EMACSDIR/bin/doom" install --aot --force --verbose
                  fi

                  PATH="''${PATH:-/bin:}:${emacs.package}/bin:${git.package}/bin" \
                    "$EMACSDIR/bin/doom" sync -e --gc --aot --force --verbose
                fi
              '';
            }
          )
          {
            "doom/init.el".source = ./doom/init.el;
            "doom/packages.el".source = ./doom/packages.el;
            "doom/config.el" = {
              text = concatLines [
                (
                  let
                    extraBins = with pkgs; [
                      (aspellWithDicts (
                        p: with p; [
                          en
                          ru
                        ]
                      )) # :checkers (spell +aspell)
                      asmfmt # :editor format
                      cargo # :lang rust
                      clang-tools # :lang (cc +lsp) :editor format
                      cmake-format # :lang cc :editor format
                      cmigemo # :lang japanese
                      config.hm.programs.emacs.package # !doom
                      config.nix.package # !doom
                      delve # :lang go :tools debugger
                      dockerfile-language-server-nodejs # :tools (docker +lsp)
                      dockfmt # :tools docker :editor format
                      editorconfig-core-c # :tools editorconfig
                      fd # doom!
                      gcc # :lang cc
                      gdb # :tools debugger
                      ghc # :lang haskell
                      gnuplot # :lang (org +gnuplot)
                      gnutar # :tools tree-sitter
                      gnutls # doom! :app irc
                      go # :lang go
                      godef # :lang go
                      gomodifytags # :lang go
                      gopls # :lang (go +lsp)
                      gore # :lang go
                      gotests # :lang go
                      gotools # :lang go
                      graphviz # :lang (org +roam2) :lang plantuml
                      gzip # :tools tree-sitter
                      haskellPackages.cabal-fmt # :lang haskell :editor format
                      haskellPackages.cabal-install # :lang haskell
                      haskellPackages.haskell-language-server # :lang (haskell +lsp)
                      haskellPackages.hoogle # :lang haskell
                      haskellPackages.ormolu # :lang haskell :editor format
                      html-tidy # :lang web :editor format
                      jdk # :lang java :lang plantuml :checkers grammar
                      languagetool # :checkers grammar
                      libxml2 # :lang data :editor format
                      markdownlint-cli # :lang markdown
                      nixd # :lang (nix +lsp)
                      nixfmt # :lang nix :editor format
                      nls # :lang (nickel +lsp)
                      nodePackages.bash-language-server # :lang (sh +lsp)
                      # nodePackages.eslint # :lang (json +lsp)
                      nodePackages.js-beautify # :lang web
                      nodePackages.prettier # :editor format
                      nodePackages.stylelint # :lang web
                      nodejs # :tools debugger
                      pandoc # :lang org markdown latex
                      pinentry-emacs # doom!
                      pipenv # :lang python
                      poetry # :lang python
                      pre-commit # :tools magit
                      pyright # :lang python :editor format
                      python3 # :lang python
                      python3Packages.black # :lang python :editor format
                      python3Packages.isort # :lang python :editor format
                      python3Packages.nose2 # :lang python
                      python3Packages.pyflakes # :lang python :editor format
                      python3Packages.pytest # :lang python
                      ripgrep # doom!
                      rust-analyzer # :lang (rust +lsp)
                      rustc # :lang rust
                      rustfmt # :lang rust
                      shellcheck # :lang sh
                      shfmt # :lang sh :editor format
                      sops
                      sqlite # :lang (org +roam2) :tools lookup
                      terraform-ls # :tools (terraform +lsp)
                      texlab # lang (tex +lsp)
                      texlive.combined.scheme-full # :lang org tex
                      unzip # :tools debugger
                      vscode-langservers-extracted # :lang (json +lsp) (web +lsp)
                      wordnet # :tools (lookup +dictionary +offline)
                      yaml-language-server # :lang (yaml +lsp)
                      zstd # :emacs undo
                    ];
                  in
                  ''
                    ;; Integrate packages which are required by various modules
                    ;; without polluting the user's profile.
                    (setq exec-path (append exec-path '(${concatMapStringsSep " " (x: ''"${x}/bin"'') extraBins})))
                    (setenv "PATH" (concat (getenv "PATH") ":${concatMapStringsSep ":" (x: "${x}/bin") extraBins}"))

                    (appendq! auth-sources '(("${config.secrets.authinfo.path}")))

                    ;; HACK Explicitly load specific Emacs packages from Nixpkgs.
                    ;; For some reason providing them as "extraPackages" doesn't
                    ;; work.
                    (add-to-list 'load-path "${pkgs.mu.mu4e}/share/emacs/site-lisp/mu4e")
                    (add-to-list 'load-path "${pkgs.emacsPackages.vterm}/share/emacs/site-lisp/elpa/vterm-${pkgs.emacsPackages.vterm.version}")
                    (load "${
                      pkgs.fetchurl {
                        name = "tvl.el";
                        url = "https://code.tvl.fyi/plain/tools/emacs-pkgs/tvl/tvl.el?id=84a82f6f41b422f7f76e44e3705ee509b6c6eaf6";
                        hash = "sha256-vJsV7w4aMV9Y9zbXLHMIR53xAsXdUVBIXrxUTjdvty0=";
                      }
                    }")

                    ;; :input japanese
                    (setq migemo-dictionary "${pkgs.cmigemo}/share/migemo/utf-8/migemo-dict"
                          skk-large-jisyo "${pkgs.skkDictionaries.l}/share/skk/SKK-JISYO.L")

                    ;; :editor parinfer
                    (setq parinfer-rust-library "${pkgs.parinfer-rust-emacs}/lib/libparinfer_rust.so")

                    ;; :lang (org +roam2) :email mu4e
                    (setq emacsql-sqlite-executable "${getExe pkgs.emacsql-sqlite}")

                    ;; :lang plantuml
                    (setq plantuml-jar-path "${pkgs.plantuml}/lib/plantuml.jar"
                          plantuml-executable-path "${getExe' pkgs.plantuml "plantuml"}"
                          org-plantuml-jar-path plantuml-jar-path
                          org-plantuml-executable-path plantuml-executable-path)

                    ;; :app irc
                    (setq circe-default-nick "${my.username}"
                          circe-default-realname "${my.email}"
                          circe-default-user circe-default-nick)
                  ''
                )
                (with config.stylix.fonts; ''
                  (setq doom-font "${monospace.name}-${toString sizes.terminal}"
                        doom-serif-font "${serif.name}-${toString sizes.terminal}"
                        doom-variable-pitch-font "${sansSerif.name}-${toString sizes.terminal}"
                        doom-emoji-font "${emoji.name}-${toString sizes.terminal}")
                '')
                (
                  with config.hm.accounts.email;
                  let
                    mu4eAccounts =
                      let
                        muAccounts = filter (a: a.mu.enable) (attrValues accounts);
                      in
                      concatMapStringsSep "\n" (
                        a:
                        with a;
                        let
                          personalAddresses = concatMapStringsSep " " (v: ''"${v}"'') aliases;
                        in
                        ''
                          (set-email-account! "${name}"
                            '((user-full-name           . "${realName}")
                              (user-mail-address        . "${address}")
                              (mu4e-inbox-folder        . "/${name}/${folders.inbox}")
                              (mu4e-sent-folder         . "/${name}/${folders.sent}")
                              (mu4e-drafts-folder       . "/${name}/${folders.drafts}")
                              (mu4e-trash-folder        . "/${name}/${folders.trash}")
                              (mu4e-refile-folder       . "/${name}/Archive")
                              ${optionalString (signature.showSignature != "none")
                                ''(mu4e-compose-signature   . "${replaceStrings [ "\n" ] [ "\\n" ] signature.text}")''
                              }
                              (+mu4e-personal-addresses . (${personalAddresses})))
                            t)
                        ''
                      ) muAccounts;
                  in
                  ''
                    (setq mu4e-root-maildir "${maildirBasePath}")

                    ${mu4eAccounts}
                  ''
                )
                (builtins.readFile ./doom/config.el)
              ];
            };
          };

      programs = {
        emacs = {
          enable = true;
          package = pkgs.emacs29-pgtk;
        };

        bash.initExtra = mkAfter ''
          export PATH="$PATH:$XDG_CONFIG_HOME/emacs/bin"

          # https://github.com/akermu/emacs-libvterm
          if [[ "$INSIDE_EMACS" = vterm ]] && [[ -n "$EMACS_VTERM_PATH" ]] && [[ -f "$EMACS_VTERM_PATH/etc/emacs-vterm-bash.sh" ]]; then
              source "$EMACS_VTERM_PATH/etc/emacs-vterm-bash.sh"
          fi

          # Not sourced from inside Emacs for some reason. Maybe it's not
          # considered an interactive shell?
          [[ -f ~/.profile ]] && . ~/.profile
        '';
      };
    };
  };
}

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