refactor(flake): split NixOS Home Manager configs

Create a NixOS-specific Home Manager configuration and a reusable shared
configuration that can be imported and also used by other configurations,
such as WSL2.

system/nixos/default.nix

@@ -1,5 +1,7 @@
 { inputs, username }:
 
+{ desktop }:
+
 let
   configuration = import ./configuration.nix;
   hardware-configuration = import ./hardware-configuration.nix;
@@ -8,7 +10,7 @@ inputs.nixpkgs.lib.nixosSystem {
   modules = [
     inputs.home-manager.nixosModules.home-manager {
       home-manager = {
-        extraSpecialArgs = { inherit inputs; };
+        extraSpecialArgs = { inherit inputs desktop username; };
         useGlobalPkgs = true;
         useUserPackages = true;
         users."${username}" = import ./home-manager.nix;

system/nixos/hardware-configuration.nix

@@ -1,6 +1,3 @@
-# Do not modify this file!  It was generated by ‘nixos-generate-config’
-# and may be overwritten by future invocations.  Please make changes
-# to /etc/nixos/configuration.nix instead.
 { config, lib, pkgs, modulesPath, ... }:
 
 {

system/nixos/home-manager-desktop.nix

@@ -0,0 +1,240 @@
+{ config, inputs, pkgs }:
+
+{
+  nixpkgs = {
+    config.allowUnfreePredicate = pkg:
+      builtins.elem (inputs.lib.getName pkg) [ "postman" ];
+  };
+
+  services.swayidle = {
+    enable = true;
+
+    events = [
+      {
+        event = "before-sleep";
+        command = "${pkgs.swaylock}/bin/swaylock --daemonize --image ~/.config/wallpaper/wallpaper.jpg";
+      }
+    ];
+  };
+
+  services.swayidle.timeouts = [
+    {
+      timeout = 300;
+      command = "${pkgs.swaylock}/bin/swaylock --daemonize --image ~/.config/wallpaper/wallpaper.jpg";
+    }
+
+    {
+      timeout = 600;
+      command = "swaymsg 'output * dpms off'";
+      resumeCommand = "swaymsg 'output * dpms on'";
+    }
+  ];
+
+  programs.swaylock = {
+    enable = true;
+
+    settings = {
+      daemonize = true;
+      image = "~/.config/wallpaper/wallpaper.jpg";
+    };
+  };
+
+  wayland.windowManager.sway = {
+    enable = true;
+
+    config = {
+      assigns = {
+        "1" = [{ app_id = "firefox"; }];
+        "2" = [{ app_id = "Alacritty"; }];
+        "3" = [{ class = "vlc"; }];
+        "9" = [
+          { class = "Slack"; }
+          { class = "discord"; }
+        ];
+        # Get app_id with swaymsg -t get_tree
+      };
+
+      bars = [
+        {
+          colors = {
+            background = "#222222";
+            focusedWorkspace = {
+              background = "#ffffff";
+              border = "#ffffff";
+              text = "#333333";
+            };
+            statusline = "#ffffff";
+          };
+
+          fonts = {
+            names = [ "DejaVu Sans Mono" ];
+            size = 16.0;
+          };
+
+          statusCommand = "i3status-rs ~/.config/i3status-rust/config-default.toml";
+          trayPadding = 10;
+        }
+      ];
+
+      gaps = {
+        inner = 10;
+        smartBorders = "on";
+        smartGaps = true;
+      };
+
+      input = {
+        "*" = {
+          xkb_layout = "gb";
+        };
+
+        "type:touchpad" = {
+          dwt = "enabled";
+          tap = "enabled";
+        };
+      };
+
+      keybindings =
+        let modifier = config.wayland.windowManager.sway.config.modifier;
+        in inputs.nixpkgs.lib.mkOptionDefault {
+          "${modifier}+Escape" = "exec swaylock --daemonize";
+          "${modifier}+Shift+b" = "exec firefox";
+          "${modifier}+tab" = "workspace back_and_forth";
+        };
+
+      menu = "wofi --show run";
+      modifier = "Mod4";
+
+      output = {
+        "*" = {
+          bg = "~/.config/wallpaper/wallpaper.jpg fill";
+        };
+
+        eDP-1 = {
+          scale = "1.0";
+        };
+      };
+
+      terminal = "alacritty";
+
+      window.border = 3;
+    };
+
+    extraConfig = ''
+      set $laptop eDP-1
+      bindswitch --reload --locked lid:on output $laptop disable
+      bindswitch --reload --locked lid:off output $laptop enable
+
+      bindsym --locked XF86MonBrightnessDown exec brightnessctl set 5%-
+      bindsym --locked XF86MonBrightnessUp exec brightnessctl set 5%+
+
+      exec alacritty
+      exec firefox
+
+      for_window [class="vlc"] inhibit_idle fullscreen
+
+      for_window [app_id="zoom"] floating enable
+      for_window [app_id="zoom" title="Choose ONE of the audio conference options"] floating enable
+      for_window [app_id="firefox" title="Firefox — Sharing Indicator"] floating enable
+      for_window [app_id="zoom" title="zoom"] floating enable
+      for_window [app_id="zoom" title="Zoom Meeting"] floating disable
+      for_window [app_id="zoom" title="Zoom - Free Account"] floating disable
+    '';
+  };
+
+  programs.i3status-rust = {
+    enable = true;
+
+    bars = {
+      default = {
+        blocks = [
+          {
+            block = "net";
+            format = " $ip ";
+          }
+          {
+            block = "battery";
+            format = " $icon $percentage $time ";
+          }
+          {
+            block = "cpu";
+          }
+          {
+            block = "memory";
+            format = " $icon $mem_total_used_percents.eng(w:2) ";
+            format_alt = " $icon_swap $swap_used_percents.eng(w:2) ";
+          }
+          {
+            block = "disk_space";
+            path = "/";
+            info_type = "available";
+            alert_unit = "GB";
+            interval = 20;
+            warning = 20.0;
+            alert = 10.0;
+            format = " $icon $available.eng(w:2) ";
+          }
+          {
+            block = "time";
+            interval = 1;
+            format = " $timestamp.datetime(f:'%F %T') ";
+          }
+        ];
+
+        settings = {
+          theme = {
+            theme = "plain";
+            overrides = {
+              critical_bg = "#222222";
+              good_bg = "#222222";
+              good_fg = "#ffffff";
+              idle_bg = "#222222";
+              idle_fg = "#ffffff";
+              info_bg = "#222222";
+              info_fg = "#ffffff";
+              separator_bg = "#222222";
+              warning_bg = "#222222";
+              warning_fg = "#ffffff";
+            };
+          };
+        };
+      };
+    };
+  };
+
+  xdg.configFile.wallpaper = {
+    source = ../../config/wallpaper;
+    recursive = true;
+  };
+
+  programs.firefox = {
+    enable = true;
+    package = pkgs.firefox-devedition;
+  };
+
+  programs.alacritty = {
+    enable = true;
+
+    settings = {
+      window.opacity = 0.9;
+
+      window.padding = {
+        x = 15;
+        y = 15;
+      };
+
+      font = {
+        size = 12.0;
+
+        normal.family = "JetBrainsMono Nerd Font Mono";
+        italic.style = "Regular";
+        bolditalic.style = "Regular";
+        bold.style = "Regular";
+
+        offset.y = 12;
+        glyph_offset.y = 6;
+      };
+
+      shell = { program = "zsh"; };
+    };
+  };
+}

system/nixos/home-manager.nix

@@ -1,50 +1,33 @@
-{ inputs, pkgs, ... }:
+{ inputs, desktop, username, config, pkgs, ... }:
 
+let
+  desktop-config = import ./home-manager-desktop.nix { inherit config inputs pkgs; };
+  shared-config = import ../shared/home-manager.nix { inherit inputs pkgs username; };
+  shared-packages = import ../shared/home-manager-packages.nix { inherit inputs pkgs; };
+in
 {
-  imports = [
-    ../../home-manager/modules/common.nix
-    ../../home-manager/modules/git.nix
-    ../../home-manager/modules/home-manager.nix
-    ../../home-manager/modules/tmux.nix
-    ../../home-manager/modules/zsh.nix
+  imports = if desktop then [ desktop-config shared-config ] else [ shared-config ];
+
+  home.packages = shared-packages ++ pkgs.lib.optionals desktop [
+    pkgs.discord
+    pkgs.meslo-lg
+    pkgs.pass
+    pkgs.pinentry
+    pkgs.postman
+    pkgs.slack
+    pkgs.teams
+    pkgs.vlc
+    pkgs.wofi
+    pkgs.xcape
+    pkgs.zoom-us
   ];
 
-  home.stateVersion = "22.05";
-
-  home.username = "opdavies";
-  home.homeDirectory = "/home/opdavies";
-
-  programs.firefox = {
-    enable = true;
-    package = pkgs.firefox-devedition;
+  home.sessionVariables = {
+    EDITOR = "nvim";
+    LANG = "en_GB.UTF-8";
+    LC_ALL = "en_GB.UTF-8";
+    LC_CTYPE = "en_GB.UTF-8";
+    PULUMI_SKIP_UPDATE_CHECK = "true";
+    RIPGREP_CONFIG_PATH = "$HOME/.config/ripgrep/config";
   };
-
-  programs.alacritty = {
-    enable = true;
-
-    settings = {
-      window.opacity = 0.9;
-
-      window.padding = {
-        x = 15;
-        y = 15;
-      };
-
-      font = {
-        size = 12.0;
-
-        normal.family = "JetBrainsMono Nerd Font Mono";
-        italic.style = "Regular";
-        bolditalic.style = "Regular";
-        bold.style = "Regular";
-
-        offset.y = 12;
-        glyph_offset.y = 6;
-      };
-
-      shell = { program = "zsh"; };
-    };
-  };
-
-  home.packages = with pkgs; [ discord meslo-lg slack teams vlc wofi xcape zoom-us ];
 }