Update the Nix config

A bunch of minor updates here, a bunch of minor changes there.
All of the Nix changes is here for all the world to see.

Makefile

@@ -6,39 +6,40 @@ DOTS	:= /etc/dotfiles
 NIXOS_VERSION	:= 20.09
 NIXOS_PREFIX	:= $(PREFIX)/etc/nixos
 FLAGS		:= -I "config=$$(pwd)/config" \
-		-I "modules=$$(pwd)/modules" \
+                   -I "modules=$$(pwd)/modules" \
-		-I "bin=$$(pwd)/bin" \
+                   -I "bin=$$(pwd)/bin" \
-		$(FLAGS)
+                   $(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.
-unstable_channels:
+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
 
-channels:
-	@sudo nix-channel --add "https://nixos.org/channels/nixos-${NIXOS_VERSION}" nixos
-	@sudo nix-channel --add "https://github.com/rycee/home-manager/archive/release-${NIXOS_VERSION}.tar.gz" home-manager
-	@sudo nix-channel --add "https://nixos.org/channels/nixpkgs-unstable" nixpkgs-unstable
-
 update:
 	@sudo nix-channel --update
 
 switch:
 	@sudo nixos-rebuild $(FLAGS) switch
 
+# 'boot' and 'switch' are somewhat the same except 'boot' takes care of setting the kernel so use this if you've changed the kernel settings.
+boot:
+	@sudo nixos-rebuild $(FLAGS) boot
+
 install: channels update
-	@sudo nixos-generate-config --root "$(PREFIX)" && sudo cp --update "$(NIXOS_PREFIX)/hardware-configuration.nix" "$$(pwd)/hosts/$(HOST)/hardware-configuration.nix"
+	@sudo nixos-generate-config --root "$(PREFIX)"
 	@echo "import \"$(DOTS)\" \"$(HOST)\" \"$${USER}\"" | sudo tee "${NIXOS_PREFIX}/configuration.nix"
 	@sudo nixos-install --root "$(PREFIX)" $(FLAGS)
 	@sudo cp -r "$(DOTS)" "$(PREFIX)/etc/dotfiles"
-	@sudo nixos-enter --root "$(PREFIX)" -c chown $(USER):users $(DOTS)
+	@sudo nixos-enter --root "$(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)"
 
 clean:
-	@sudo nix-collect-garbage -d
+	@nix-collect-garbage -d
 
 upgrade: update switch
 

README.adoc

@@ -31,10 +31,10 @@ To correct this behavior, simply configure the `PREFIX` variable (e.g., `PREFIX=
 
 For more information, simply inspect the link:./Makefile[`./Makefile`].
 
-Assuming you did install, your project will have the following stuff.
+Assuming you did install, your NixOS setup will have the following stuff.
 
-- Add the nixpkgs unstable channel as `nixpkgs-unstable` (i.e., `nix-channels --update https://nixos.org/channels/nixos-unstable`).
+- Uses the NixOS unstable channel (https://nixos.org/channels/nixos-unstable) for its package set.
-- Have the https://github.com/rycee/home-manager[home-manager] installed with the stable release.
+- Have the https://github.com/rycee/home-manager[home-manager] installed with the unstable release.
 - You start with the TTY and nothing else is installed (i.e., bare installation similar in spirit to Arch Linux).
 To setup your graphical installation, see the <<Themes>> section.
 
@@ -45,8 +45,8 @@ There are some things you need to keep in mind when using this setup.
 
 * This setup is not meant to be fully reproducible.
 It is a personal setup for a person who wants to live on the bleeding edge, personally.
-Despite being a NixOS setup which should be reproducible on paper, it mainly uses the unstable versions of the channels and packages.
+Despite being a NixOS setup which should be reproducible on paper, it mainly uses the unstable versions of the channels and packages meaning you would have a different installation each time (unless you do something like https://nixos.org/guides/towards-reproducibility-pinning-nixpkgs.html[pinning the nixpkgs repo] or using https://www.tweag.io/blog/2020-05-25-flakes/[the flakes feature]).
-If we're to install this setup at separate times, the full list of installed packages with their depedencies and versions wouldn't be the same.
+footnote:[I'm most likely using the Nix flakes some time in the future.]
 
 * It may use third-party channels for certain versions of the packages, hammering the first precaution even further regarding reproducibility.
 
@@ -117,7 +117,6 @@ For best practice, you may want to follow the following project structure:
 ├── config/
 ├── modules/
 ├── default.nix*
-├── hardware-configuration.nix*
 └── README.adoc
 ----
 
@@ -128,9 +127,6 @@ For best practice, you may want to follow the following project structure:
 * `default.nix` is the entrypoint for our host module.
 It contains configuration of our link:./modules[`./modules`], NixOS (i.e., `man configuration.nix`), https://github.com/rycee/home-manager[home-manager] (i.e., `man home-configuration.nix`), and other things you might want to include in the host-specific `$HOST/modules/` folder.
 
-* `hardware-configuration.nix` is there for hardware configurations...
-(I plan to remove this one since it should use the dynamically generated hardware config at `/etc/nixos/hardware-configuration.nix`.)
-
 * A README file in whatever format you prefer.
 (I just choose https://asciidoctor.org/[Asciidoctor] with the `.adoc` file extension since it's my go-to document format.)
 
@@ -209,9 +205,9 @@ footnote:[Don't forget to visit the nixpkgs repo and look at the source code for
 
 It'll be a full-time geeky story if I have to explain so I'll put it in a bullet list.
 
-* You can configure your system from the system-wide packages, user-specific packages, boot loader settings, graphical environments, and what-have-you.
+* You can configure your system from the system-wide packages, user-specific packages, boot loader settings, graphical environments, and what-have-you stored in text files.
-That fact alone blew my mind ever since I saw @hlissner's NixOS and the temptation just keeps growing ever since.
+That fact alone blew my mind ever since I saw @hlissner's NixOS and the temptation just keeps growing ever since I see more NixOS-related posts.
-This is where the real power of NixOS (and also https://guix.gnu.org/[GuixSD]) really made it worth: declarative configuration.
+This is where the real power of NixOS (and also https://guix.gnu.org/[GuixSD]) really made it worth the try: declarative system and local configuration.
 
 * It is reproducible (in a way, anyway).
 Compared to other distros I've used in the past before discovering NixOS (which is only Arch and Fedora), it is very easy to reproduce the config.
@@ -227,6 +223,14 @@ It's like Windows Restore on steroids.
 * The packaging process is straightforward (or so I've heard).
 I've yet to create one but it'll quickly change once I found my ideal set up for starting game dev as a hobby.
 
+* Hipster points.
+https://www.archlinux.org/[Arch?]
+https://k1ss.org/[KISS Linux?]
+https://www.gentoo.org/[Gentoo?]
+http://www.linuxfromscratch.org/[Linux From Scratch?]
+Forget that!
+NixOS-influenced distros are the future and I'll continue to shill it for the rest of my computing shtick.
+
 
 === Want to learn NixOS?
 
@@ -255,6 +259,9 @@ The https://nixos.wiki/[unofficial NixOS wiki] is one of the more reliable sourc
 For more learning on the Nix conventions, ecosystem, and practices, I recommend https://nix.dev/[nix.dev] to look out for.
 It provides some information that the official (and unofficial) sources misses.
 
+
+=== Problems encountered along the way
+
 NixOS is a wildly different beast compared to other distros.
 I did go through some rocky road to learning it;
 my time learning NixOS is not composed of 100% absorbing the information efficiently.

hosts/zilch/config/unison/default.prf

@@ -1,7 +1,8 @@
 # Paths to synchronize
-path = writings
-path = projects
 path = library
+path = phone
+path = projects
+path = writings
 
 # My GnuPG keys
 path = .gnupg
@@ -18,6 +19,7 @@ ignore = Name *~
 ignore = Name .*~
 ignore = Name *.o
 ignore = Name *.tmp
+ignore = Name *.qcow2
 
 # Node cache
 ignore = Name node_modules
@@ -25,6 +27,9 @@ ignore = Name node_modules
 # Rust build caches
 ignore = Name target
 
+# Nix build result
+ignore = Name result
+
 # The diff command with the unified style (the same style Git uses for showing diffs)
 diff = diff --unified
 

hosts/zilch/default.nix

@@ -3,12 +3,14 @@
 { config, pkgs, lib, ... }:
 
 {
-  nixpkgs.overlays = import ./modules/overlays.nix;
-
   # Use the systemd-boot EFI boot loader.
   boot.loader.systemd-boot.enable = true;
   boot.loader.efi.canTouchEfiVariables = true;
 
+  # Change the Linux kernel version.
+  boot.kernelPackages = pkgs.linuxPackages_5_8;
+  boot.extraModulePackages = [ pkgs.linuxPackages_5_8.nvidia_x11 ];
+
   # Clean up the /tmp directory.
   boot.cleanTmpDir = true;
 
@@ -57,12 +59,24 @@
     };
   };
 
+  # Enable some font configs.
+  fonts = {
+    enableDefaultFonts = true;
+    fontconfig.enable = true;
+  };
+
   # Module configurations.
   modules = {
     desktop = {
+      audio = {
+        enable = true;
+        composition.enable = true;
+        production.enable = true;
+      };
       browsers = {
         brave.enable = true;
         firefox.enable = true;
+        nyxt.enable = true;
       };
       cad.enable = true;
       fonts.enable = true;
@@ -73,10 +87,6 @@
         _3d.enable = true;
       };
       multimedia.enable = true;
-      music = {
-        composition.enable = true;
-        production.enable = true;
-      };
       research.enable = true;
     };
 
@@ -93,6 +103,7 @@
         godot.enable = true;
         unity3d.enable = true;
       };
+      go.enable = true;
       java.enable = true;
       javascript = {
         deno.enable = true;
@@ -102,10 +113,19 @@
         guile.enable = true;
         racket.enable = true;
       };
+      perl.enable = true;
+      python = {
+        enable = true;
+        math.enable = true;
+      };
       rust.enable = true;
       vcs.enable = true;
     };
 
+    drivers = {
+      veikk.enable = true;
+    };
+
     editors = {
       default = "nvim";
       emacs.enable = true;
@@ -115,16 +135,6 @@
 
     services = {
       recoll.enable = true;
-      unison = {
-        enable = true;
-        flags =
-          let
-            homeDirectory = "/home/${config.my.username}";
-            backupDrive = "/run/media/${config.my.username}/Seagate Backup Plus Drive";
-          in ''
-            -root ${homeDirectory} -root ${backupDrive} -auto -batch -fat -force ${homeDirectory} -mountpoint ${backupDrive} -ignorearchives
-        '';
-      };
     };
 
     shell = {
@@ -145,12 +155,12 @@
 
   my.packages = with pkgs; [
     # Muh games.
-    unstable.dwarf-fortress      # Losing is fun!
+    dwarf-fortress      # Losing is fun!
-    unstable.endless-sky         # Losing is meh!
+    endless-sky         # Losing is meh!
-    unstable.minetest            # Losing?! What's that?
+    minetest            # Losing?! What's that?
-    unstable.openmw              # Losing is even more meh1
+    openmw              # Losing is even more meh1
-    unstable.wesnoth             # Losing is frustrating!
+    wesnoth             # Losing is frustrating!
-    unstable.zeroad              # Losing is fun and frustrating!
+    zeroad              # Losing is fun and frustrating!
 
     # Installing some of the dependencies required for my scripts.
     ffcast
@@ -167,12 +177,14 @@
     xorg.xwininfo
     zbar
 
-    # My custom packages.
+    # Some other packages.
-    # fds-nur.brl-cad
+    screenkey
-    # fds-nur.hypermail
+  ]
-    # fds-nur.wikiman
+
-    nur.foo-dogsquared.segno
+  # My custom packages.
-  ];
+  ++ (with pkgs.nur.foo-dogsquared; [
+    segno
+  ]);
 
   # Setting up the shell environment.
   my.env = {
@@ -206,15 +218,22 @@
   # Install a proprietary Nvidia graphics driver.
   services.xserver = {
     libinput = {
+      enable = true;
       middleEmulation = true;
     };
-    videoDrivers = [ "nvidiaLegacy390" ];
+    # digimend.enable = true;
+    # videoDrivers = [ "nvidiaLegacy390" ];
   };
 
   # Enable sound.
   sound.enable = true;
   hardware.pulseaudio.enable = true;
 
+  # Enable OpenGL.
+  hardware = {
+    opengl.enable = true;
+  };
+
   # Additional host-specific program configurations.
   my.home = {
     programs = {
@@ -232,7 +251,33 @@
         userEmail = "${config.my.email}";
       };
     };
+
+    services = {
+      unison = let
+        homeDirectory = "/home/${config.my.username}";
+        backupDrive = "/run/media/${config.my.username}/Seagate Backup Plus Drive";
+      in {
+        enable = true;
+        pairs.mainBackup = {
+          roots = [ homeDirectory backupDrive ];
+          commandOptions = {
+            auto = "true";
+            batch = "true";
+            fat = "true";
+            force = "${homeDirectory}";
+            links = "false";
+            ui = "text";
+          };
+        };
+      };
+    };
   };
 
   my.user.extraGroups = [ "docker" ];
+
+  # This value determines the NixOS release with which your system is to be
+  # compatible, in order to avoid breaking some software such as database
+  # servers. You should change this only after NixOS release notes say you
+  # should.
+  system.stateVersion = "20.03"; # Did you read the comment?
 }

hosts/zilch/modules/overlays.nix

@@ -1,15 +0,0 @@
-# All of the machine-specific overlays.
-[
-  (self: super:
-  {
-    rofi = super.rofi.overrideAttrs (oldAttrs: {
-      name = "rofi-next";
-      src = super.fetchFromGitHub {
-        owner = "davatorium";
-        repo = "rofi";
-        rev = "802a9489e7fbf809890ab6bf39e62664fa4c134f";
-        sha256 = "1qjqw7v6qdmc5bxfaq57cb8hf99vr0prp5bn4yzal7r5im855s8f";
-      };
-    });
-  })
-]

modules/desktop/audio.nix

@@ -1,22 +1,35 @@
+# My audio tools...
 # I create "music" (with no experience whatsoever) so here's my "music" workflow.
+# TODO: I may have to switch to Pipewire for the FUTURE.
 { config, options, lib, pkgs, ... }:
 
 with lib;
 
 let
-  cfg = config.modules.desktop.music;
+  cfg = config.modules.desktop.audio;
 in {
-  options.modules.desktop.music = 
+  options.modules.desktop.audio =
     let mkBoolDefault = bool: mkOption {
       type = types.bool;
       default = bool;
     }; in {
+      enable = mkBoolDefault false;
       composition.enable = mkBoolDefault false;
       production.enable = mkBoolDefault false;
     };
 
-  config = {
+  config = mkIf cfg.enable {
+    # Enable JACK for the most serious audio applications.
+    services.jack = {
+      alsa.enable = true;
+      jackd.enable = true;
+    };
+
     my.packages = with pkgs;
+      [
+        cadence
+      ] ++
+
       (if cfg.composition.enable then [
         lilypond            # Prevent your compositions to be forever lost when you're in grave by engraving them now (or whenever you feel like it).
         musescore           # A music composer for creating musical cheatsheets.
@@ -40,5 +53,11 @@ in {
         # As of 2020-07-03, lmms has some trouble regarding Qt or something so at least use the "unstable" channel just to be safe.
         # lmms
       ] else []);
+
+    # Required when enabling JACK daemon.
+    my.user.extraGroups = [ "jackaudio" ];
+
+    # Add the sequencer and the MIDI kernel module.
+    boot.kernelModules = [ "snd-seq" "snd-rawmidi" ];
   };
 }

modules/desktop/default.nix

@@ -3,13 +3,13 @@
 
 {
   imports = [
+    ./audio.nix
     ./browsers.nix
     ./cad.nix
     ./files.nix
     ./fonts.nix
     ./graphics.nix
     ./multimedia.nix
-    ./music.nix
     ./research.nix
   ];
 }

modules/desktop/files.nix

@@ -22,13 +22,19 @@ in {
       unison
       magic-wormhole        # Magically transfer stuff between your wormholes!
       qbittorrent           # Free version of uBittorrent.
-      transmission          # One of the components for sailing the high seas.
-      syncthing             # A peer-to-peer synchro summoning.
       xfce.thunar           # A graphical file manager.
       xfce.thunar-volman    # A Thunar plugin on volume management for external devices.
       udiskie               # An automounter for external devices with authentication.
     ];
 
+    services = {
+      # Enable Syncthing for them cross-device syncing.
+      syncthing.enable = true;
+
+      # Argh! Open t' gateweh t' th' high seas!
+      transmission.enable = true;
+    };
+
     # Clean 'yer home!
     my.env = {
       RECOLL_CONFDIR = "$XDG_DATA_HOME/recoll";

modules/desktop/fonts.nix

@@ -25,7 +25,7 @@ with lib;
       };
 
       fonts = with pkgs; [
-       dejavu_fonts
+       dejavu_fonts          # Makes you feel like you've seen them before.
        fira-code             # The programming font with fancy symbols.
        ibm-plex              # IBM's face, is it professional?
        iosevka               # The fancy monofont with fancy ligatures.

modules/dev/default.nix

@@ -8,6 +8,7 @@
     ./data.nix
     ./documentation.nix
     ./gamedev.nix
+    ./go.nix
     ./java.nix
     ./javascript.nix
     ./lisp.nix

modules/dev/documentation.nix

@@ -38,7 +38,7 @@ in
 
       # TODO: Make Neuron its own package.
       (let
-        neuronRev = "5c37dd3bbfff7d203883417bee2e2970d41cd70d";
+        neuronRev = "2ea28ba1f023f169657a31a3cad621f1d745c606";
         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

@@ -1,25 +1,19 @@
-# Ah yes, Rust...
+# Go, go, Golang coders!
-# The programming language that made me appreciate/tolerate C++ even more.
 { config, options, lib, pkgs, ... }:
 
 with lib;
 {
-  options.modules.dev.rust = {
+  options.modules.dev.go = {
     enable = mkOption {
       type = types.bool;
       default = false;
     };
   };
 
-  config = mkIf config.modules.dev.rust.enable {
+  config = mkIf config.modules.dev.go.enable {
     my.packages = with pkgs; [
-      rustup
+      delve     # Wait, Go doesn't have a proper debugger?
+      go        # The other zoomer proglang (READ: proglang is a zoomer term for programming language).
     ];
-
-    my.env = {
-      CARGO_HOME = "$XDG_DATA_HOME/cargo";
-      RUSTUP_HOME = "$XDG_DATA_HOME/rustup";
-      PATH = [ "$CARGO_HOME/bin" ];
-    };
   };
 }

modules/dev/vcs.nix

@@ -12,7 +12,7 @@ with lib;
 
   config = mkIf config.modules.dev.vcs.enable {
     my.packages = with pkgs; [
-      git
+      gitAndTools.gitFull
       mercurial
       subversion
     ];

modules/editors/vscode.nix

@@ -96,10 +96,15 @@ let
       version = "4.2.0";
       sha256 = "1in8lj5gim3jdy33harib9z8qayp5jn8pz6j0zpicbzxx87g2hm1";
     }
+
+    # Creating a Rust mini-IDE.
+    {
+      name = "rust";
+      publisher = "rust-lang";
+      version = "0.7.8";
+      sha256 = "039ns854v1k4jb9xqknrjkj8lf62nfcpfn0716ancmjc4f0xlzb3";
+    }
   ];
-  vscode-with-extensions = pkgs.vscode-with-extensions.override {
-    vscodeExtensions = extensions;
-  };
 in
 {
   options.modules.editors.vscode = {
@@ -110,8 +115,21 @@ in
   };
 
   config = mkIf config.modules.editors.vscode.enable {
-    my.packages = [
+    my.home = {
-      vscode-with-extensions
+      programs.vscode = {
-    ];
+        enable = true;
+        extensions = extensions;
+        userSettings = {
+          "diffEditor.codeLens" = true;
+          "editor.fontFamily" = "'Iosevka', 'Droid Sans Mono', 'monospace', monospace, 'Droid Sans Fallback'";
+          "editor.fontLigatures" = true;
+          "eslint.alwaysShowStatus" = true;
+          "git.alwaysShowStagedChangesResourceGroup" = true;
+          "update.mode" = "none";
+          "workbench.colorTheme" = "Nord";
+          "workbench.iconTheme" = "material-icon-theme";
+        };
+      };
+    };
   };
 }

modules/services/recoll.nix

@@ -31,7 +31,6 @@ in
         Service = {
           Environment = [ "RECOLL_CONFDIR=\"$XDG_DATA_HOME/recoll\"" ];
           ExecStart = "${(pkgs.recoll.override { withGui = false; })}/bin/recollindex ${cfg.flags}";
-          Restart = "on-failure";
         };
 
         Install = {

packages/default.nix

@@ -1,13 +1,9 @@
 [
   (self: super: with super; {
-
     # Add packages from the unstable channel with `pkgs.unstable.$PKG`.
-    unstable = import <nixpkgs-unstable> { inherit config; };
+    veikk-linux-driver = (callPackage ./veikk-driver.nix { kernel = pkgs.linux_5_8; });
     nur.foo-dogsquared = import (
       fetchTarball "https://github.com/foo-dogsquared/nur-packages/archive/develop.tar.gz"
     ) { inherit pkgs; };
   })
-
-  # The unstable branch of Emacs.
-  # (import (builtins.fetchTarball https://github.com/nix-community/emacs-overlay/archive/master.tar.gz))
 ]

packages/veikk-driver.nix

@@ -0,0 +1,33 @@
+{ stdenv, fetchFromGitHub, kernel }:
+
+stdenv.mkDerivation rec {
+  name = "veikk-linux-driver";
+  version = "2.0.0";
+
+  src = fetchFromGitHub {
+    owner = "jlam55555";
+    repo = "veikk-linux-driver";
+    rev = "v2.0";
+    sha256 = "11mg74ds58jwvdmi3i7c4chxs6v9g09r9ll22pc2kbxjdnrp8zrn";
+  };
+
+  nativeBuildInputs = kernel.moduleBuildDependencies;
+
+  patchPhase = ''
+    sed -i Makefile -e 's/modprobe veikk//' -e 's/depmod//'
+  '';
+
+  INSTALL_MOD_PATH = "\${out}";
+
+  makeFlags = [
+    "BUILD_DIR=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
+  ];
+
+  meta = with stdenv.lib; {
+    description = "Linux device driver for supported VEIKK tablets (e.g., S640, A50, A30).";
+    homepage = "https://github.com/jlam55555/veikk-linux-driver";
+    licenses = licenses.free;
+    maintainers = with maintainers; [ foo-dogsquared ];
+    platforms = platforms.linux;
+  };
+}