feat: add NixOS configuration.nix file and shell script to rebuild it

.editorconfig

@@ -0,0 +1,18 @@
+# EditorConfig is awesome: https://editorconfig.org
+
+# top-most .editorconfig file
+root = true
+
+# All files
+[*]
+indent_style = space  # Use spaces for indentation
+indent_size = 2       # Number of spaces used per indentation level
+
+
+# Override for Makefile
+[Makefile]
+indent_style = tab
+
+# Markdown files (md)
+[*.md]
+trim_trailing_whitespace = false  # Markdown can use trailing whitespace for line breaks

.gitignore

@@ -3,3 +3,6 @@
 
 # IDEs
 .idea/
+
+# Ignore private configurations
+ssh-config.nix

Makefile

@@ -0,0 +1,7 @@
+# Makefile for updating NixOS configuration
+
+.PHONY: all
+
+# Default target
+all:
+	./build-nix.sh

README.md

@@ -1,19 +1,22 @@
 # Dotfiles
 
-This repository is my setup for a new MacOS computer.  
+In this repo I store my config files.
+- `Brewfile` for macOS (I'm about to drop it).
+- `configuration.nix` for NixOS (a new linux distro for me, that I'm exploring as a replacement for macOS).
 It helps me to install quickly all software I need for work and fun.
-Feel free to check & alter the list of software to be installed - [Brewfile](Brewfile).
-
-Additionally I install next software, that is not (yet) presented in Brew:
-
-- Upwork
-- Toggl Track
+Feel free to check & alter the list of software to be installed in these files.
 
 ## Installation
 
+### macOS/Brew
 1. Install Brew from here: https://brew.sh/
 2. Copy Brewfile to your computer and run `brew bundle` from the same folder where you copied the file.
 3. Run `chmod +x ./cron-adjust-microphone-gain-to-100.sh` and `./cron-adjust-microphone-gain-to-100.sh` [to change microphone gain to 100% on macOS](https://apple.stackexchange.com/questions/97810/mac-osx-microphone-input-volume-level-auto-adjusts-can-it-be-disabled).
 
 Note: Brew will ask you for the root password and other apps inside Brewfile might ask you for your password as well.  
 Usually installation takes 10-20 min, so make sure to brew a cup of tea or coffee :)
+
+### NixOS
+1. `chmod +x ./build-nix.sh`
+2. [Optionally] SSH Config `cp ./ssh-config.nix.example ./ssh-config.nix` and fill with your values.
+3. [First run] `./build-nix.sh` or [then] just `make`

build-nix.sh

@@ -0,0 +1,25 @@
+#!/bin/sh
+
+# Make sure that the script exits if any command returns a non-zero exit code
+set -e
+
+# Define the path to the system configuration file
+NIXOS_CONFIG_PATH="/etc/nixos/configuration.nix"
+
+echo "Checking for sudo access..."
+# Ensure the script is being run with superuser privileges
+sudo -v
+
+echo "Backing up current configuration..."
+# Create a backup of the current configuration file with a timestamp
+sudo cp "${NIXOS_CONFIG_PATH}" "${NIXOS_CONFIG_PATH}-backup-$(date +%F-%H-%M-%S)"
+
+echo "Copying new configuration..."
+# Copy the local configuration.nix to the system configuration location
+sudo cp ./configuration.nix "${NIXOS_CONFIG_PATH}"
+
+echo "Rebuilding NixOS configuration..."
+# Rebuild the NixOS configuration and make the changes effective
+sudo nixos-rebuild switch
+
+echo "NixOS configuration updated successfully."

configuration.nix

@@ -0,0 +1,129 @@
+# Edit this configuration file to define what should be installed on
+# your system.  Help is available in the configuration.nix(5) man page
+# and in the NixOS manual (accessible by running ‘nixos-help’).
+
+{ config, pkgs, lib, ... }:
+
+let
+  sshConfigPath = ./ssh-config.nix;
+in
+{
+  imports =
+    [ # Include the results of the hardware scan.
+      ./hardware-configuration.nix
+    ] ++ lib.optional (builtins.pathExists sshConfigPath) sshConfigPath;
+
+  # Bootloader.
+  boot.loader.grub.enable = true;
+  boot.loader.grub.device = "/dev/nvme0n1";
+  boot.loader.grub.useOSProber = true;
+
+  networking.hostName = "spy4x-pc";
+  networking.networkmanager.enable = true;
+
+  # Allow install "unfree" apps, like Google Chrome or WebStorm
+  nixpkgs.config.allowUnfree = true;
+
+  time.timeZone = "Asia/Singapore";
+
+  i18n.defaultLocale = "en_SG.UTF-8";
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "en_SG.UTF-8";
+    LC_IDENTIFICATION = "en_SG.UTF-8";
+    LC_MEASUREMENT = "en_SG.UTF-8";
+    LC_MONETARY = "en_SG.UTF-8";
+    LC_NAME = "en_SG.UTF-8";
+    LC_NUMERIC = "en_SG.UTF-8";
+    LC_PAPER = "en_SG.UTF-8";
+    LC_TELEPHONE = "en_SG.UTF-8";
+    LC_TIME = "en_SG.UTF-8";
+  };
+
+  # Enable the X11 windowing system.
+  services.xserver.enable = true;
+
+  # Enable the GNOME Desktop Environment.
+  services.xserver.displayManager.gdm.enable = true;
+  services.xserver.desktopManager.gnome.enable = true;
+
+  # Configure keymap in X11
+  services.xserver = {
+    layout = "us";
+    xkbVariant = "";
+  };
+
+  # Activate and configure Docker
+  virtualisation.docker.enable = true;
+  virtualisation.docker.autoPrune.enable = true;
+  # virtualisation.docker.enableNvidia = true; # experiment for Roley?
+
+  # Enable sound with pipewire.
+  sound.enable = true;
+  hardware.pulseaudio.enable = false;
+  security.rtkit.enable = true;
+  services.pipewire = {
+    enable = true;
+    alsa.enable = true;
+    alsa.support32Bit = true;
+    pulse.enable = true;
+  };
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.spy4x = {
+    isNormalUser = true;
+    description = "Anton Shubin";
+    extraGroups = [
+      "networkmanager"
+      "wheel"
+      "bluetooth"
+      "docker"
+    ];
+    packages = with pkgs; [
+      # Shell tools
+      git
+      gnumake               # Source for "make" command
+      htop                  # System monitor viewer
+      unzip
+      killall               # Kill processes by name instead of PID
+      ncdu                  # Disk space usage stats, per folder, nested
+      libwebp               # Convert images into .webp format
+      speedtest-rs          # Internet speed test
+      wl-clipboard          # Wayland's clipboard copy/paste cli tools
+      tree
+
+      # Work
+      nodejs_21
+      nodePackages.pnpm
+      vscode-fhs            # Wrapped variant of vscode which launches in a FHS compatible environment. Should allow for easy usage of extensions without nix-specific modifications.
+      jetbrains.webstorm
+      upwork
+      slack
+      ffmpeg                # for Roley project
+      awscli
+
+      # Other
+      google-chrome
+      bitwarden             # Password manager client
+      vlc
+      obs-studio            # Video recorder and stream software
+      solaar                # Logitech devices GUI. Strictly use with sudo, otherwise it doesn't see devices.
+    ];
+  };
+  programs.steam.enable = true; # Install Steam for games management
+
+  # Shell aliases and other init
+  environment.interactiveShellInit = ''
+    alias copy='wl-copy <'
+    alias build='sudo nixos-rebuild switch'
+  '';
+
+  # Enable automatic login for the user.
+  services.xserver.displayManager.autoLogin.enable = true;
+  services.xserver.displayManager.autoLogin.user = "spy4x";
+
+  # Workaround for GNOME autologin: https://github.com/NixOS/nixpkgs/issues/103746#issuecomment-945091229
+  systemd.services."getty@tty1".enable = false;
+  systemd.services."autovt@tty1".enable = false;
+
+  system.stateVersion = "23.11";
+}

ssh-config.nix.example

@@ -0,0 +1,12 @@
+# Part of config, to remote machine aliases for SSH
+
+{ ... }: {
+  programs.ssh.extraConfig = ''
+
+    Host my-remote-machine          # alias to do "ssh my remote-machine"
+      HostName 192.192.192.192      # ip/hostname
+      User my-user                  # username
+
+    # ... other hosts
+  '';
+}