Update the config

Makefile

@@ -3,21 +3,18 @@ HOST	:= zilch
 HOME	:= /home/$(USER)
 DOTS	:= /etc/dotfiles
 
-NIXOS_VERSION	:= 20.09
-NIXOS_PREFIX	:= $(PREFIX)/etc/nixos
-FLAGS		:= -I "config=$$(pwd)/config" \
+NIXOS_VERSION   := 20.09
+NIXOS_PREFIX    := $(PREFIX)/etc/nixos
+FLAGS           := -I "config=$$(pwd)/config" \
                    -I "modules=$$(pwd)/modules" \
                    -I "bin=$$(pwd)/bin" \
                    $(FLAGS)
 
-config:	$(NIXOS_PREFIX)/configuration.nix
-home:	$(HOME)/dotfiles
-
 # The channels will be used on certain modules like in `packages/default.nix` where it will be referred to install certain packages from the unstable channel.
 channels:
 	@sudo nix-channel --add "https://nixos.org/channels/nixos-unstable" nixos
 	@sudo nix-channel --add "https://github.com/rycee/home-manager/archive/master.tar.gz" home-manager
-	@sudo nix-channel --add "https://nixos.org/channels/nixpkgs-unstable" nixpkgs-unstable
+	@sudo nix-channel --add "https://nixos.org/channels/nixpkgs-unstable" nixpkgs
 
 update:
 	@sudo nix-channel --update
@@ -29,11 +26,13 @@ switch:
 boot:
 	@sudo nixos-rebuild $(FLAGS) boot
 
+# A little bootstrapping script.
 install: channels update
 	@sudo nixos-generate-config --root "$(PREFIX)"
-	@echo "import \"$(DOTS)\" \"$(HOST)\" \"$${USER}\"" | sudo tee "${NIXOS_PREFIX}/configuration.nix"
+	@echo "import \"$$(pwd)\" \"$(HOST)\" \"$${USER}\"" | sudo tee "${NIXOS_PREFIX}/configuration.nix"
 	@sudo nixos-install --root "$(PREFIX)" $(FLAGS)
-	@sudo cp -r "$(DOTS)" "$(PREFIX)/etc/dotfiles"
+	@sudo cp -r "$(DOTS)" "$(PREFIX)/$(DOTS)"
+	@echo "import \"$(DOTS)\" \"$(HOST)\" \"$${USER}\"" | sudo tee "${NIXOS_PREFIX}/configuration.nix"
 	@sudo nixos-enter --root "$(PREFIX)" --command "chown $(USER):users $(DOTS) --recursive"
 	@sudo nixos-enter --root "$(PREFIX)" --command "make -C $(DOTS) channels"
 	@echo "Set password for $(USER)" && sudo nixos-enter --root "$(PREFIX)" --command "passwd $(USER)"
@@ -44,7 +43,7 @@ clean:
 upgrade: update switch
 
 rollback:
-	@sudo nix-env --rollback
+	@sudo nixos-rebuild switch $(FLAGS) --rollback
 
 test:
 	@nixos-rebuild $(FLAGS) test

README.adoc

@@ -15,8 +15,8 @@ You can replace your NixOS configuration with this bad boi.
 To install, you have to do the following first:
 
 - Set up your partitions.
-- Copy this setup (either with `git` or what-have-you) to `/etc/dotfiles`.
-- Install GNU Make.
+- Copy this setup (either with `git` or what-have-you) in whatever location you prefer.
+- Install GNU Make (i.e., `nix-env -i gnumake`).
 
 Then simply run `make install`.
 It is equivalent to the following command:
@@ -67,6 +67,7 @@ The project structure should look like the following:
 nixos-config
 ├── config/
 ├── hosts/
+├── lib/
 ├── modules/
 ├── packages/
 ├── templates/
@@ -92,6 +93,8 @@ In this case, it is my https://github.com/foo-dogsquared/dotflies[dotfiles] dire
 It is also used on the installation phase (from `make install`) by setting the `HOST` variable (i.e., `HOST=zilch make -C /etc/install`) with the folder name as the argument.
 See the <<Hosts>> section for more details.
 
+* A little library in link:./lib[`./lib`] based from https://github.com/hlissner/dotfiles[original source] which being used for various uses (e.g., limiting certain modules).
+
 * Though my custom packages are now placed in my https://github.com/foo-dogsquared/nur-packages[NUR repo], the `packages/` folder still exists here intended for "private" packages.
 Also contains third-party package repositories and overlays such as the https://github.com/nix-community/NUR[NUR], https://github.com/nix-community/emacs-overlay[unstable branch of Emacs], or the unstable branch of https://github.com/NixOS/nixpkgs/[nixpkgs].
 See the <<Packages>> section for more information.

default.nix

@@ -5,6 +5,7 @@
 #
 # This is ground zero, where the absolute essentials go, to be present on all systems I use nixos on.
 # Contains cluser-wide configurations shared between all of the systems (located in `hosts/`).
+# TODO: Convert into a flake-based configuration so it'll make my life easier.
 
 device: username:
 { pkgs, options, lib, config, ... }:

hosts/zilch/config/unison/default.prf

@@ -13,6 +13,9 @@ path = .password-store
 # My SSH keys
 path = .ssh
 
+# My Cachix signing key
+path = .config/cachix
+
 # Some regexps specifying names and paths to ignore
 ignore = Name temp.*
 ignore = Name *~

hosts/zilch/default.nix

@@ -3,6 +3,18 @@
 { config, pkgs, lib, ... }:
 
 {
+  nixpkgs.config.permittedInsecurePackages = [
+    "spidermonkey-38.8.0"
+  ];
+
+  # Set the Nix package manager to use the unstable version for flakes.
+  nix = {
+    package = pkgs.nixUnstable;
+    extraOptions = ''
+      experimental-features = nix-command flakes
+    '';
+  };
+
   # Use the systemd-boot EFI boot loader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;

lib/attrs.nix

@@ -0,0 +1,26 @@
+{ lib, ... }:
+
+with builtins;
+with lib;
+rec {
+  # attrsToList
+  attrsToList = attrs:
+    mapAttrsToList (name: value: { inherit name value; }) attrs;
+
+  # mapFilterAttrs ::
+  #   (name -> value -> bool)
+  #   (name -> value -> { name = any; value = any; })
+  #   attrs
+  mapFilterAttrs = pred: f: attrs: filterAttrs pred (mapAttrs' f attrs);
+
+  # Generate an attribute set by mapping a function over a list of values.
+  genAttrs' = values: f: listToAttrs (map f values);
+
+  # anyAttrs :: (name -> value -> bool) attrs
+  anyAttrs = pred: attrs:
+    any (attr: pred attr.name attr.value) (attrsToList attrs);
+
+  # countAttrs :: (name -> value -> bool) attrs
+  countAttrs = pred: attrs:
+    count (attr: pred attr.name attr.value) (attrsToList attrs);
+}

lib/default.nix

@@ -0,0 +1,18 @@
+{ lib, pkgs, ... }:
+
+let
+  inherit (lib) makeExtensible attrValues foldr;
+  inherit (modules) mapModules;
+
+  modules = import ./modules.nix {
+    inherit lib;
+    self.attrs = import ./attrs.nix { inherit lib; self = {}; };
+  };
+
+  mylib = makeExtensible (self:
+    with self; mapModules (toString ./.)
+      (file: import file { inherit self lib pkgs; }));
+in
+mylib.extend
+  (self: super:
+    foldr (a: b: a // b) {} (attrValues super))

lib/modules.nix

@@ -0,0 +1,53 @@
+{ self, lib, ... }:
+
+let
+  inherit (builtins) attrValues readDir pathExists concatLists;
+  inherit (lib) id mapAttrsToList filterAttrs hasPrefix hasSuffix nameValuePair removeSuffix;
+  inherit (self.attrs) mapFilterAttrs;
+in
+rec {
+  mapModules = dir: fn:
+    mapFilterAttrs
+      (n: v:
+        v != null &&
+        !(hasPrefix "_" n))
+      (n: v:
+        let path = "${toString dir}/${n}"; in
+        if v == "directory" && pathExists "${path}/default.nix"
+        then nameValuePair n (fn path)
+        else if v == "regular" &&
+                n != "default.nix" &&
+                hasSuffix ".nix" n
+        then nameValuePair (removeSuffix ".nix" n) (fn path)
+        else nameValuePair "" null)
+      (readDir dir);
+
+  mapModules' = dir: fn:
+    attrValues (mapModules dir fn);
+
+  mapModulesRec = dir: fn:
+    mapFilterAttrs
+      (n: v:
+        v != null &&
+        !(hasPrefix "_" n))
+      (n: v:
+        let path = "${toString dir}/${n}"; in
+        if v == "directory"
+        then nameValuePair n (mapModulesRec path fn)
+        else if v == "regular" && n != "default.nix" && hasSuffix ".nix" n
+        then nameValuePair (removeSuffix ".nix" n) (fn path)
+        else nameValuePair "" null)
+      (readDir dir);
+
+  mapModulesRec' = dir: fn:
+    let
+      dirs =
+        mapAttrsToList
+          (k: _: "${dir}/${k}")
+          (filterAttrs
+            (n: v: v == "directory" && !(hasPrefix "_" n))
+            (readDir dir));
+      files = attrValues (mapModules dir id);
+      paths = files ++ concatLists (map (d: mapModulesRec' d id) dirs);
+    in map fn paths;
+}

lib/options.nix

@@ -0,0 +1,18 @@
+{ lib, ... }:
+
+let
+  inherit (lib) mkOption types;
+in
+rec {
+  mkOpt  = type: default:
+    mkOption { inherit type default; };
+
+  mkOpt' = type: default: description:
+    mkOption { inherit type default description; };
+
+  mkBoolOpt = default: mkOption {
+    inherit default;
+    type = types.bool;
+    example = true;
+  };
+}

modules/desktop/audio.nix

@@ -21,7 +21,6 @@ in {
   config = mkIf cfg.enable {
     # Enable JACK for the most serious audio applications.
     services.jack = {
-      alsa.enable = true;
       jackd.enable = true;
     };
 
@@ -55,7 +54,7 @@ in {
       ] else []);
 
     # Required when enabling JACK daemon.
-    my.user.extraGroups = [ "jackaudio" ];
+    my.user.extraGroups = [ "audio" "jackaudio" ];
 
     # Add the sequencer and the MIDI kernel module.
     boot.kernelModules = [ "snd-seq" "snd-rawmidi" ];

modules/desktop/files.nix

@@ -19,8 +19,9 @@ in {
       (recoll.override {
         withGui = false;
       })                    # Bring the search engine to the desktop!
-      unison
+      unison                # Back those files up, son.
       magic-wormhole        # Magically transfer stuff between your wormholes!
+      oneshot               # Basically `python -m http.server` that can deliver files to various devices.
       qbittorrent           # Free version of uBittorrent.
       xfce.thunar           # A graphical file manager.
       xfce.thunar-volman    # A Thunar plugin on volume management for external devices.

modules/desktop/fonts.nix

@@ -13,7 +13,7 @@ with lib;
   config = mkIf config.modules.desktop.fonts.enable {
     # Enable fontconfig to easily discover fonts installed from home-manager.
     fonts = {
-      enableFontDir = true;
+      fontDir.enable = true;
       enableDefaultFonts = true;
       fontconfig = {
         enable = true;

modules/dev/data.nix

@@ -18,6 +18,7 @@ with lib;
       jq            # A JSON parser on the command-line (with the horrible syntax, in my opinion).
       pup           # A cute little puppy that can understand HTML.
       sqlite        # A cute little battle-tested library for your data abominations.
+      sqlitebrowser # Skim the DB and create a quick scraping script for it.
     ];
   };
 }

modules/dev/documentation.nix

@@ -25,20 +25,22 @@ in
 
   config = mkIf cfg.enable {
     my.packages = with pkgs; [
-      asciidoctor       # An Asciidoctor document keeps a handful of few frustrated users a day.
-      aspell            # The not-opinionated spell checker.
+      asciidoctor           # An Asciidoctor document keeps a handful of few frustrated users a day.
+      aspell                # The not-opinionated spell checker.
       aspellDicts.en
       aspellDicts.en-computers
       aspellDicts.en-science
-      hugo              # An SSG for your DDD (documentation-driven development) workflow.
-      languagetool      # A grammar checker with a HUGE data set.
-      pandoc            # The Swiss army knife for document conversion.
-      R                 # Rated G for accessibility.
-      vale              # The customizable linter for your intended writings.
+      editorconfig-core-c   # A library just for formatting files?
+      editorconfig-checker  # Check yer formatting.
+      hugo                  # An SSG for your DDD (documentation-driven development) workflow.
+      languagetool          # A grammar checker with a HUGE data set.
+      pandoc                # The Swiss army knife for document conversion.
+      R                     # Rated G for accessibility.
+      vale                  # The customizable linter for your intended writings.
 
       # TODO: Make Neuron its own package.
       (let
-        neuronRev = "2ea28ba1f023f169657a31a3cad621f1d745c606";
+        neuronRev = "e7568ca5f51609bb406a48527b5ba52d31d11f9c";
         neuronSrc = builtins.fetchTarball "https://github.com/srid/neuron/archive/${neuronRev}.tar.gz";
         in import neuronSrc {})     # Neurons and zettels are good for the brain.
     ] ++

modules/dev/go.nix

@@ -2,6 +2,10 @@
 { config, options, lib, pkgs, ... }:
 
 with lib;
+
+let
+  cfg = config.modules.dev.go;
+in
 {
   options.modules.dev.go = {
     enable = mkOption {
@@ -10,7 +14,7 @@ with lib;
     };
   };
 
-  config = mkIf config.modules.dev.go.enable {
+  config = mkIf cfg.enable {
     my.packages = with pkgs; [
       delve     # Wait, Go doesn't have a proper debugger?
       go        # The other zoomer proglang (READ: proglang is a zoomer term for programming language).

modules/dev/java.nix

@@ -3,6 +3,10 @@
 { config, options, lib, pkgs, ... }:
 
 with lib;
+
+let
+  cfg = config.modules.dev.java;
+in
 {
   options.modules.dev.java = {
     enable = mkOption {
@@ -11,7 +15,7 @@ with lib;
     };
   };
 
-  config = mkIf config.modules.dev.java.enable {
+  config = mkIf cfg.enable {
     my.packages = with pkgs; [
       jdk       # The Java Development Kit.
       jre       # The Java Runtime Environment for running Java apps.

modules/dev/rust.nix

@@ -3,6 +3,10 @@
 { config, options, lib, pkgs, ... }:
 
 with lib;
+
+let
+  cfg = config.modules.dev.rust;
+in
 {
   options.modules.dev.rust = {
     enable = mkOption {
@@ -11,7 +15,7 @@ with lib;
     };
   };
 
-  config = mkIf config.modules.dev.rust.enable {
+  config = mkIf cfg.enable {
     my.packages = with pkgs; [
       rustup
     ];

modules/dev/vcs.nix

@@ -2,6 +2,10 @@
 { config, options, lib, pkgs, ... }:
 
 with lib;
+
+let
+  cfg = config.modules.dev.vcs;
+in
 {
   options.modules.dev.vcs = {
     enable = mkOption {
@@ -10,7 +14,7 @@ with lib;
     };
   };
 
-  config = mkIf config.modules.dev.vcs.enable {
+  config = mkIf cfg.enable {
     my.packages = with pkgs; [
       gitAndTools.gitFull
       mercurial

modules/shell/base.nix

@@ -19,14 +19,15 @@ with lib;
       exa           # ls(1) after an exodus.
       fd            # find(1) after a cognitive behavioral therapy.
       fzf           # A fuzzy finder that enables fuzzy finding not furry finding, a common misconception.
+      gopass        # The improved version of Password Store which is a password manager for hipsters.
+      graphviz      # The biz central for graphical flowcharts.
       hexyl         # Binary viewer with a cool name on the command-line.
       hledger       # Do your accountancy thing ON THE COMMAND LINE, sure why not!
       httpie        # Want a piece of the HTTP pie.
-      gitAndTools.tig # The Deltarune of Git.
-      gopass        # The improved version of Password Store which is a password manager for hipsters.
-      graphviz      # The biz central for graphical flowcharts.
-      maim          # A command-line interface for parsing screenshots.
       jq            # A command-line interface for parsing JSON.
+      lazygit       # For the lazy gits who cannot get good at Git.
+      lazydocker    # For the lazy gits who cannot get good at Docker.
+      maim          # A command-line interface for parsing screenshots.
       pup           # A command-line interface for parsing HTML.
       (ripgrep.override { withPCRE2 = true; })       # Super-fast full-text searcher.
       (recoll.override { withGui = false; })          # Bring the search engine to the desktop!

modules/themes/default.nix

@@ -4,37 +4,15 @@ with lib;
 
 let
   cfg = config.modules.themes;
+  my = import ../../lib { inherit pkgs; lib = lib; };
 in
 {
+  assertions = [{
+    assertion = my.countAttrs (_: x: x.enable) cfg < 2;
+    message = "Can't have more than one theme enabled at a time";
+  }];
+
   imports = [
     ./fair-and-square
   ];
-
-  options.modules.themes = {
-    name = mkOption {
-      type = with types; nullOr str;
-      default = null;
-    };
-
-    version = mkOption {
-      type = with types; nullOr str;
-      default = null;
-    };
-
-    path = mkOption {
-      type = with types; nullOr path;
-      default = null;
-    };
-
-    wallpaper = mkOption {
-      type = with types; nullOr path;
-      default = if cfg.path != null
-                then "${cfg.path}/config/wallpaper"
-        else null;
-    };
-  };
-
-  config = mkIf (cfg.path != null && builtins.pathExists cfg.wallpaper) {
-    my.home.home.file.".background-image".source = cfg.wallpaper;
-  };
 }

modules/themes/fair-and-square/config/polybar/config

@@ -59,7 +59,7 @@
 
     modules-left = bspwm
     modules-center = date
-    modules-right = pulseaudio eth memory root-fs
+    modules-right = pulseaudio eth memory root-fs home-fs
 
 
 [module/root-fs]
@@ -73,6 +73,17 @@
     label-unmounted = N/A
 
 
+[module/home-fs]
+    type = internal/fs
+    mount-0 = /home/
+    format-mounted-prefix = ""
+    format-mounted-prefix-margin-right = 1
+    format-unmounted-prefix = ""
+    format-unmounted-prefix-margin-right = 1
+    label-mounted = %free%
+    label-unmounted = N/A
+
+
 [module/bspwm]
     type = internal/bspwm
     wrapping-scroll = false

modules/themes/fair-and-square/default.nix

@@ -10,13 +10,6 @@ with lib;
   };
 
   config = mkIf config.modules.themes."fair-and-square".enable {
-    # Pass the metadata of the theme.
-    modules.theme = {
-      name = "Fair and square";
-      version = "0.1.0";
-      path = ./.;
-    };
-
     services = {
       # Enable picom compositor.
       picom = {
@@ -29,8 +22,6 @@ with lib;
       xserver = {
         displayManager = {
           lightdm.enable = true;
-          lightdm.greeters.mini.enable = true;
-          lightdm.greeters.mini.user = config.my.username;
           defaultSession = "none+bspwm";
         };
         enable = true;
@@ -45,6 +36,9 @@ with lib;
       # Enable GTK configuration.
       gtk.enable = true;
 
+      # Set the wallpaper.
+      home.file.".background-image".source = ./config/wallpaper;
+
       # Enable QT configuration and set it to the same GTK config.
       qt.enable = true;
       qt.platformTheme = "gtk";
@@ -89,14 +83,14 @@ with lib;
           '';
         })
       ];
-    };
 
-    # Set the cursor theme.
-    xdg.dataFile = {
-      "icons/default/index.theme".text = ''
-        [icon theme]
-        Inherits=Adwaita
-      '';
+      # Set the cursor theme.
+      xdg.dataFile = {
+        "icons/default/index.theme".text = ''
+          [icon theme]
+          Inherits=Adwaita
+        '';
+      };
     };
 
     my.packages = with pkgs; [