Update various configurations

Flake outputs, hosts, users, and formatting of Nix files. et cetera, et
cetera.

flake.nix

@@ -3,9 +3,11 @@
   inputs = {
     nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
 
+    # Managing home configurations.
     home-manager.url = "github:nix-community/home-manager";
     home-manager.inputs.nixpkgs.follows = "nixpkgs";
 
+    # Managing your secrets.
     agenix.url = "github:ryantm/agenix";
     agenix.inputs.nixpkgs.follows = "nixpkgs";
 
@@ -82,6 +84,9 @@
 
         # Stallman-senpai will be disappointed. :(
         nixpkgs.config.allowUnfree = true;
+
+        # Let home-manager to manage itself.
+        programs.home-manager.enable = true;
       };
     in {
       # Exposes only my library with the custom functions to make it easier to include in other flakes.

hosts/ni/default.nix

@@ -5,7 +5,8 @@
 { config, pkgs, ... }:
 
 {
-  imports = [ # Include the results of the hardware scan.
+  imports = [
+    # Include the results of the hardware scan.
     ./hardware-configuration.nix
   ];
 
@@ -18,6 +19,7 @@
       audio.enable = true;
       fonts.enable = true;
       hardware.enable = true;
+      cleanup.enable = true;
     };
     dev = {
       enable = true;
@@ -27,6 +29,7 @@
     editors.neovim.enable = true;
     themes.a-happy-gnome.enable = true;
     users.users = [ "foo-dogsquared" ];
+    hardware-setup.backup-archive.enable = true;
   };
 
   # Use the systemd-boot EFI boot loader.
@@ -71,61 +74,5 @@
   # Before changing this value read the documentation for this option
   # (e.g. man configuration.nix or on https://nixos.org/nixos/options.html).
   system.stateVersion = "21.11"; # Did you read the comment?
-
-  # This is my external hard disk so it has to be non-blocking.
-  fileSystems."/mnt/external-storage" = {
-    device = "/dev/disk/by-uuid/665A391C5A38EB07";
-    fsType = "ntfs";
-    noCheck = true;
-    options = [
-      "nofail"
-      "noauto"
-      "user"
-
-      # See systemd.mount.5 and systemd.automount.5 manual page for more
-      # details.
-      "x-systemd.automount"
-      "x-systemd.device-timeout=2"
-      "x-systemd.idle-timeout=2"
-    ];
-  };
-
-  # Automated backup for my external storage.
-  services.borgbackup.jobs = {
-    personal_archive = {
-      exclude = [
-        "/home/*/.cache"
-
-        # The usual NodeJS shenanigans.
-        "*/node_modules"
-        "*/.next"
-
-        # Rust-related files.
-        "projects/software/*/result"
-        "projects/software/*/build"
-        "projects/software/*/target"
-      ];
-      doInit = false;
-      removableDevice = true;
-      repo = "/mnt/external-storage/backups";
-      paths = [ "~/dotfiles" "~/library" "~/writings" ];
-      encryption = {
-        mode = "repokey";
-        passCommand = "${pkgs.gopass}/bin/gopass show misc/BorgBackup_pass";
-      };
-      compression = "auto,lzma";
-      startAt = "daily";
-      prune = {
-        prefix = "{hostname}-";
-        keep = {
-          within = "1d";
-          daily = 30;
-          weekly = 4;
-          monthly = 6;
-          yearly = 4;
-        };
-      };
-    };
-  };
 }
 

hosts/ni/hardware-configuration.nix

@@ -4,26 +4,25 @@
 { config, lib, pkgs, modulesPath, ... }:
 
 {
-  imports =
+  imports = [ (modulesPath + "/installer/scan/not-detected.nix") ];
-    [ (modulesPath + "/installer/scan/not-detected.nix")
-    ];
 
-  boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
+  boot.initrd.availableKernelModules =
+    [ "xhci_pci" "ahci" "usbhid" "usb_storage" "sd_mod" ];
   boot.initrd.kernelModules = [ ];
   boot.kernelModules = [ "kvm-intel" ];
   boot.extraModulePackages = [ ];
 
-  fileSystems."/" =
+  fileSystems."/" = {
-    { device = "/dev/disk/by-uuid/f52c2729-2036-4bdf-8d54-21f929f3447b";
+    device = "/dev/disk/by-uuid/f52c2729-2036-4bdf-8d54-21f929f3447b";
-      fsType = "ext4";
+    fsType = "ext4";
-    };
+  };
 
-  fileSystems."/boot" =
+  fileSystems."/boot" = {
-    { device = "/dev/disk/by-uuid/AB3A-34BC";
+    device = "/dev/disk/by-uuid/AB3A-34BC";
-      fsType = "vfat";
+    fsType = "vfat";
-    };
+  };
 
-  swapDevices = [ { label = "swap"; } ];
+  swapDevices = [{ label = "swap"; }];
 
   powerManagement.cpuFreqGovernor = lib.mkDefault "powersave";
 }

lib/flake-utils.nix

@@ -50,32 +50,36 @@ in rec {
         ++ (lib.modulesToList (lib.filesToAttr ../modules/nixos));
     };
 
-    /* Create a home-manager configuration for use in flakes.
+  /* Create a home-manager configuration for use in flakes.
 
-    This is a wrapper for `home-manager.lib.homeManagerConfiguration`.
+     This is a wrapper for `home-manager.lib.homeManagerConfiguration`.
 
-    Signature:
+     Signature:
-      file -> attrset -> homeManagerConfiguration
+       file -> attrset -> homeManagerConfiguration
-    Where:
+     Where:
-      - `file` is the entry point to the home-manager configuration.
+       - `file` is the entry point to the home-manager configuration.
-      - `attrset` is the additional attribute set to be insert as one of the imported modules minus the attributes used for `home-manager.lib.homeManagerConfiguration`.
+       - `attrset` is the additional attribute set to be insert as one of the imported modules minus the attributes used for `home-manager.lib.homeManagerConfiguration`.
-    Returns:
+     Returns:
-      A home-manager configuration to be exported in flakes.
+       A home-manager configuration to be exported in flakes.
 
-    Example:
+     Example:
-      mkUser ./users/foo-dogsquared {}
+       mkUser ./users/foo-dogsquared {}
-      => { ... } # A home-manager configuration set.
+       => { ... } # A home-manager configuration set.
   */
-  mkUser = file: attrs@{ username ? (builtins.baseNameOf file), system ? sys, extraModules ? [], ... }:
+  mkUser = file:
-  let
+    attrs@{ username ? (builtins.baseNameOf file), system ? sys
-    hmConfigFunctionArgs = builtins.attrNames (builtins.functionArgs inputs.home-manager.lib.homeManagerConfiguration);
+    , extraModules ? [ ], ... }:
-    hmModules = lib.map (path: import path) (lib.modulesToList (lib.filesToAttrRec ../modules/home-manager));
+    let
-  in
+      hmConfigFunctionArgs = builtins.attrNames (builtins.functionArgs
-  inputs.home-manager.lib.homeManagerConfiguration {
+        inputs.home-manager.lib.homeManagerConfiguration);
-    inherit system username;
+      hmModules = lib.map (path: import path)
-    configuration = import file;
+        (lib.modulesToList (lib.filesToAttrRec ../modules/home-manager));
-    homeDirectory = "/home/${username}";
+    in inputs.home-manager.lib.homeManagerConfiguration {
-    extraModules = hmModules ++ extraModules ++ [ (lib.filterAttrs (n: _: !lib.elem n hmConfigFunctionArgs) attrs) ];
+      inherit system username;
-    extraSpecialArgs = { inherit lib system; };
+      configuration = import file;
-  };
+      homeDirectory = "/home/${username}";
+      extraModules = hmModules ++ extraModules
+        ++ [ (lib.filterAttrs (n: _: !lib.elem n hmConfigFunctionArgs) attrs) ];
+      extraSpecialArgs = { inherit lib system; };
+    };
 }

modules/README.adoc

@@ -0,0 +1,22 @@
+= Modules
+:toc:
+
+This directory contains modules for different components such as link:https://nixos.org/manual/nixos/stable/index.html#sec-writing-modules[NixOS modules] and link:https://github.com/nix-community/home-manager/[home-manager modules].
+
+
+
+
+== Importing the modules
+
+Usually, you'll see no `default.nix` in place since it is imported through other means.
+One of the most common way is through `filesToAttr` defined in link:../lib[my custom library].
+
+For example, to easily get a list of imported custom NixOS modules, here's one way with the custom library.
+
+[source, nix]
+----
+lib.map (path: import path) (lib.modulesToList (lib.filesToAttr ./modules/nixos))
+----
+
+Each modules may have to be imported differently.
+Please see the respective documentation (i.e., `man:configuration.nix(5)`, `man:home-configuration.nix` ) for more details.

pkgs/doggo.nix

@@ -25,7 +25,7 @@ buildGoModule rec {
   '';
 
   meta = with lib; {
-    description = "HTTP DNS client for humans.";
+    description = "HTTP DNS client for humans";
     homepage = "https://github.com/mr-karan/doggo";
     license = licenses.mit;
   };

pkgs/gnome-shell-extension-pop-shell.nix

@@ -22,16 +22,18 @@ stdenv.mkDerivation rec {
   ];
 
   postInstall = ''
-    install -Dm644 $out/share/gnome-shell/extensions/${passthru.extensionUuid}/schemas/* -t "${glib.makeSchemaPath "$out" "${pname}-${version}"}"
+     install -Dm644 $out/share/gnome-shell/extensions/${passthru.extensionUuid}/schemas/* -t "${
+       glib.makeSchemaPath "$out" "${pname}-${version}"
+     }"
 
-   # TODO: Uncomment once custom gsettings works.
+    # TODO: Uncomment once custom gsettings works.
-   # Unfortunately custom gsettings seems to be not properly integrated with NixOS yet.
+    # Unfortunately custom gsettings seems to be not properly integrated with NixOS yet.
-   #
+    #
-   # For more information, please track the following issue:
+    # For more information, please track the following issue:
-   # https://github.com/NixOS/nixpkgs/issues/92265
+    # https://github.com/NixOS/nixpkgs/issues/92265
-   #
+    #
-   # It also contains additional links to related issues and whatnot.
+    # It also contains additional links to related issues and whatnot.
-   #install -Dm644 keybindings/*.xml -t $out/share/gnome-control-center/keybindings
+    #install -Dm644 keybindings/*.xml -t $out/share/gnome-control-center/keybindings
   '';
 
   passthru.extensionUuid = "pop-shell@system76.com";

users/home-manager/foo-dogsquared/default.nix

@@ -3,11 +3,12 @@
 {
   home.packages = with pkgs; [
     brave
-    mpv
+    emacs
+    github-cli
+    ncmpcpp
   ]
   # Doom Emacs dependencies.
   ++ (with pkgs; [
-    git
     ripgrep
     gnutls
     emacs-all-the-icons-fonts
@@ -46,24 +47,11 @@
     enable = true;
     musicDirectory = "$HOME/library/music";
   };
-  services.mpdris2.enable = true;
-
-  programs.ncmpcpp = {
-    enable = true;
-    package = pkgs.ncmpcpp.override { visualizerSupport = true; };
-    # TODO: Add more vim-related keybindings.
-    bindings = [
-      { key = "j"; command = "scroll_down"; }
-      { key = "k"; command = "scroll_up"; }
-      { key = "J"; command = [ "select_item" "scroll_down" ]; }
-      { key = "K"; command = [ "select_item" "scroll_up" ]; }
-    ];
-  };
 
   # My custom modules.
   modules = {
+    bleachbit.enable = true;
     i18n.enable = true;
-    archiving.enable = true;
     dev = {
       enable = true;
       shell.enable = true;
@@ -73,5 +61,6 @@
       graphics.enable = true;
       audio.enable = true;
     };
+    research.enable = true;
   };
 }