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modules/i3.nix

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+{ pkgs, ... }:
+
+
+{
+
+  # i3 related options
+  environment.pathsToLink = [ "/libexec" ]; # links /libexec from derivations to /run/current-system/sw
+  services.xserver = {
+    enable = true;
+
+    desktopManager = {
+      xterm.enable = false;
+    };
+
+    displayManager = {
+      defaultSession = "none+i3";
+      lightdm.enable = false;
+      gdm.enable = true;
+    };
+
+    windowManager.i3 = {
+      enable = true;
+      extraPackages = with pkgs; [
+        rofi # application launcher, the same as dmenu
+        dunst # notification daemon
+        i3blocks # status bar
+        i3lock # default i3 screen locker
+        xautolock # lock screen after some time
+        i3status # provide information to i3bar
+        i3-gaps # i3 with gaps
+        picom # transparency and shadows
+        feh # set wallpaper
+        acpi # battery information
+        arandr # screen layout manager
+        dex # autostart applications
+        xbindkeys # bind keys to commands
+        xorg.xbacklight # control screen brightness
+        xorg.xdpyinfo # get screen information
+        sysstat # get system information
+      ];
+    };
+
+    # Configure keymap in X11
+    layout = "us";
+    xkbVariant = "";
+  };
+
+  # thunar file manager(part of xfce) related options
+  programs.thunar.plugins = with pkgs.xfce; [
+    thunar-archive-plugin
+    thunar-volman
+  ];
+  services.gvfs.enable = true; # Mount, trash, and other functionalities
+  services.tumbler.enable = true; # Thumbnail support for images
+}

modules/system.nix

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+{ config, pkgs, ... }:
+
+{
+  # Set your time zone.
+  time.timeZone = "Asia/Shanghai";
+
+  # Select internationalisation properties.
+  i18n.defaultLocale = "en_US.UTF-8";
+
+  i18n.extraLocaleSettings = {
+    LC_ADDRESS = "zh_CN.UTF-8";
+    LC_IDENTIFICATION = "zh_CN.UTF-8";
+    LC_MEASUREMENT = "zh_CN.UTF-8";
+    LC_MONETARY = "zh_CN.UTF-8";
+    LC_NAME = "zh_CN.UTF-8";
+    LC_NUMERIC = "zh_CN.UTF-8";
+    LC_PAPER = "zh_CN.UTF-8";
+    LC_TELEPHONE = "zh_CN.UTF-8";
+    LC_TIME = "zh_CN.UTF-8";
+  };
+
+  # Enable CUPS to print documents.
+  services.printing.enable = true;
+
+
+  fonts = {
+    fonts = with pkgs; [
+      # icon fonts
+      material-design-icons
+
+      # normal fonts
+      noto-fonts
+      noto-fonts-cjk
+      noto-fonts-emoji
+
+      # nerdfonts
+      (nerdfonts.override { fonts = [ "FiraCode" "JetBrainsMono" ]; })
+    ];
+
+    # use fonts specified by user rather than default ones
+    enableDefaultFonts = false;
+
+    # user defined fonts
+    # the reason there's Noto Color Emoji everywhere is to override DejaVu's
+    # B&W emojis that would sometimes show instead of some Color emojis
+    fontconfig.defaultFonts = {
+      serif = [ "Noto Serif" "Noto Color Emoji" ];
+      sansSerif = [ "Noto Sans" "Noto Color Emoji" ];
+      monospace = [ "JetBrainsMono Nerd Font" "Noto Color Emoji" ];
+      emoji = [ "Noto Color Emoji" ];
+    };
+  };
+
+  programs.dconf.enable = true;
+
+  # networking.firewall.allowedTCPPorts = [ ... ];
+  # networking.firewall.allowedUDPPorts = [ ... ];
+  # Or disable the firewall altogether.
+  networking.firewall.enable = false;
+
+  # Enable the OpenSSH daemon.
+  services.openssh = {
+    enable = true;
+    settings = {
+      X11Forwarding = true;
+      PermitRootLogin = "no"; # disable root login
+      PasswordAuthentication = false; # disable password login
+    };
+    openFirewall = true;
+  };
+
+  # Allow unfree packages
+  nixpkgs.config.allowUnfree = true;
+
+  # List packages installed in system profile. To search, run:
+  # $ nix search wget
+  environment.systemPackages = with pkgs; [
+    vim # Do not forget to add an editor to edit configuration.nix! The Nano editor is also installed by default.
+    wget
+    curl
+    git
+    sysstat
+    lm_sensors # for `sensors` command
+    # minimal screen capture tool, used by i3 blur lock to take a screenshot
+    # print screen key is also bound to this tool in i3 config
+    scrot
+    neofetch
+    xfce.thunar # xfce4's file manager
+    nnn # terminal file manager
+  ];
+
+  # Enable sound with pipewire.
+  sound.enable = true;
+  hardware.pulseaudio.enable = false;
+  services.power-profiles-daemon = {
+    enable = true;
+  };
+  security.polkit.enable = true;
+
+  services = {
+    dbus.packages = [ pkgs.gcr ];
+
+    geoclue2.enable = true;
+
+    pipewire = {
+      enable = true;
+      alsa.enable = true;
+      alsa.support32Bit = true;
+      pulse.enable = true;
+      # If you want to use JACK applications, uncomment this
+      jack.enable = true;
+
+      # use the example session manager (no others are packaged yet so this is enabled by default,
+      # no need to redefine it in your config for now)
+      #media-session.enable = true;
+    };
+
+    udev.packages = with pkgs; [ gnome.gnome-settings-daemon ];
+  };
+
+  # Define a user account. Don't forget to set a password with ‘passwd’.
+  users.users.panotaka = {
+    isNormalUser = true;
+    description = "panotaka";
+    extraGroups = [ "networkmanager" "wheel" ];
+    openssh.authorizedKeys.keys = [
+      "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJx3Sk20pLL1b2PPKZey2oTyioODrErq83xG78YpFBoj admin@ryan-MBP"
+    ];
+  };
+}