modules/core/boot.nix

@@ -17,24 +17,26 @@ with lib;
   };
 
   config = {
-    # Enable plymouth for better experience of booting
-    boot.plymouth.enable = true;
+    boot = {
+      # Enable plymouth for better experience of booting
+      plymouth.enable = true;
 
-    # Mount / luks device in initrd
-    # Allow fstrim to work on it.
-    # The ! makes this enabled by default
-    boot.initrd = mkIf (!cfg.iso-options.enable && cfg.disk-encryption-active) {
-      luks.devices."cryptroot" = {
-        allowDiscards = true;
+      # Mount / luks device in initrd
+      # Allow fstrim to work on it.
+      # The ! makes this enabled by default
+      initrd = mkIf (!cfg.iso-options.enable && cfg.disk-encryption-active) {
+        luks.devices."cryptroot" = {
+          allowDiscards = true;
+        };
       };
+
+      loader.systemd-boot.enable = true;
+
+      # Use latest LTS linux kernel by default
+      kernelPackages = pkgs.linuxPackages_5_15;
+
+      # Support ntfs drives
+      supportedFilesystems = [ "ntfs" ];
     };
-
-    boot.loader.systemd-boot.enable = true;
-
-    # Use latest LTS linux kernel by default
-    boot.kernelPackages = pkgs.linuxPackages_5_15;
-
-    # Support ntfs drives
-    boot.supportedFilesystems = [ "ntfs" ];
   };
 }

modules/core/default.nix

@@ -8,6 +8,7 @@ in
 {
   imports = [
     ./boot.nix
+    ./hibernation.nix
     ./fonts.nix
     ./i18n.nix
     ./networking.nix

modules/core/hibernation.nix

@@ -0,0 +1,38 @@
+{ config, pkgs, lib, ... }:
+with lib;
+let
+  cfg = config.pub-solar.core.hibernation;
+in
+{
+  options.pub-solar.core.hibernation = {
+    enable = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Whether the device can hibernate. This creates a swapfile at /swapfile.";
+    };
+
+    resumeDevice = mkOption {
+      type = types.str;
+      default = "/swapfile";
+      description = "The location of the hibernation resume swap file.";
+    };
+
+    resumeOffset = mkOption {
+      type = types.nullOr types.int;
+      default = null;
+      description = "The swap file offset. Can be found by running `filefrag -v $swap_file_location`. See https://wiki.archlinux.org/title/Power_management/Suspend_and_hibernate#Hibernation_into_swap_file";
+    };
+  };
+
+  config = {
+    boot = mkIf cfg.enable {
+      resumeDevice = cfg.resumeDevice;
+      kernelParams = [
+        "resume=${cfg.resumeDevice}"
+      ] ++ (
+        if (cfg.resumeOffset == null && cfg.enable) then builtins.abort "config.pub-solar.resumeOffset has to be set if config.pub-solar.enable is true."
+        else [ "resume_offset=${cfg.resumeOffset}" ]
+      );
+    };
+  };
+}

modules/paranoia/default.nix

@@ -0,0 +1,24 @@
+{ config, lib, ... }:
+
+with lib;
+let
+  psCfg = config.pub-solar;
+  cfg = config.pub-solar.paranoia;
+in
+{
+  options.pub-solar.paranoia = {
+    enable = mkOption {
+      description = ''
+        Only offer hibernation instead of screen locking and sleeping. This only makes sense
+        if your hard drive is encrypted, and ensures that the contents of your drive are
+        encrypted if you are not actively using the device.
+      '';
+      default = false;
+      type = types.bool;
+    };
+  };
+
+  config = mkIf cfg.enable {
+    pub-solar.core.hibernation.enable = true;
+  };
+}

modules/sway/config/config.d/custom-keybindings.conf

@@ -37,22 +37,6 @@ bindsym $mod+Ctrl+r exec record-screen
 set $menu exec alacritty --class launcher -e env TERMINAL_COMMAND="alacritty -e" sway-launcher
 bindsym $mod+Space exec $menu
 
-# Set shut down, restart and locking features
-set $mode_system (l)ock, (e)xit, (s)uspend, (h)ibernate, (r)eboot, (Shift+s)hutdown
-bindsym $mod+0 mode "$mode_system"
-mode "$mode_system" {
-    bindsym l exec swaylock-bg, mode "default"
-    bindsym e exec systemctl --user stop graphical-session.target, mode "default"
-    bindsym s exec systemctl suspend, mode "default"
-    bindsym h exec systemctl hibernate, mode "default"
-    bindsym r exec systemctl reboot, mode "default"
-    bindsym Shift+s exec systemctl poweroff, mode "default"
-
-    # exit system mode: "Enter" or "Escape"
-    bindsym Return mode "default"
-    bindsym Escape mode "default"
-}
-
 set $mode_vncclient In VNCClient mode. Press $mod+Num_Lock or $mod+Shift+Escape to return.
 bindsym $mod+Num_Lock mode "$mode_vncclient"
 bindsym $mod+Shift+Escape mode "$mode_vncclient"

modules/sway/config/config.d/mode_system.conf.nix

@@ -0,0 +1,21 @@
+{ psCfg, ... }: ''
+  # Set shut down, restart and locking features
+  set $mode_system (e)xit, (h)ibernate, (r)eboot, (Shift+s)hutdown
+  bindsym $mod+0 mode "$mode_system"
+  mode "$mode_system" {
+      bindsym e exec swaymsg exit, mode "default"
+'' + (if !psCfg.core.hibernation.enable then ''
+  bindsym h exec systemctl hibernate, mode "default"
+'' else "")
++ (if !psCfg.paranoia.enable then ''
+  bindsym l exec swaylock-bg, mode "default"
+  bindsym s exec systemctl suspend, mode "default"
+'' else "") + ''
+      bindsym r exec systemctl reboot, mode "default"
+      bindsym Shift+s exec systemctl poweroff, mode "default"
+
+      # exit system mode: "Enter" or "Escape"
+      bindsym Return mode "default"
+      bindsym Escape mode "default"
+  }
+''

modules/sway/default.nix

@@ -2,7 +2,6 @@
 with lib;
 let
   psCfg = config.pub-solar;
-  cfg = config.pub-solar.sway;
 in
 {
   options.pub-solar.sway = {
@@ -23,8 +22,8 @@ in
     };
   };
 
-  config = mkIf cfg.enable (mkMerge [
-    (mkIf (cfg.v4l2loopback.enable) {
+  config = mkIf psCfg.sway.enable (mkMerge [
+    (mkIf (psCfg.sway.v4l2loopback.enable) {
       boot.extraModulePackages = with config.boot.kernelPackages; [ v4l2loopback ];
       boot.kernelModules = [ "v4l2loopback" ];
       boot.extraModprobeConfig = ''
@@ -79,7 +78,6 @@ in
           xsettingsd
           ydotool
 
-          swaylock-bg
           sway-launcher
           record-screen
           import-gtk-settings
@@ -90,12 +88,12 @@ in
         programs.waybar.enable = true;
         #programs.waybar.systemd.enable = true;
 
-        systemd.user.services.mako = import ./mako.service.nix pkgs;
-        systemd.user.services.sway = import ./sway.service.nix pkgs;
-        systemd.user.services.swayidle = import ./swayidle.service.nix pkgs;
-        systemd.user.services.xsettingsd = import ./xsettingsd.service.nix pkgs;
-        systemd.user.services.waybar = import ./waybar.service.nix pkgs;
-        systemd.user.targets.sway-session = import ./sway-session.target.nix pkgs;
+        systemd.user.services.mako = import ./mako.service.nix { inherit pkgs psCfg; };
+        systemd.user.services.sway = import ./sway.service.nix { inherit pkgs psCfg; };
+        systemd.user.services.swayidle = import ./swayidle.service.nix { inherit pkgs psCfg; };
+        systemd.user.services.xsettingsd = import ./xsettingsd.service.nix { inherit pkgs psCfg; };
+        systemd.user.services.waybar = import ./waybar.service.nix { inherit pkgs psCfg; };
+        systemd.user.targets.sway-session = import ./sway-session.target.nix { inherit pkgs psCfg; };
 
         systemd.user.services.wayvnc = mkIf cfg.vnc.enable (import ./wayvnc.service.nix pkgs);
 
@@ -104,6 +102,7 @@ in
         xdg.configFile."sway/config.d/theme.conf".source = ./config/config.d/theme.conf;
         xdg.configFile."sway/config.d/gaps.conf".source = ./config/config.d/gaps.conf;
         xdg.configFile."sway/config.d/custom-keybindings.conf".source = ./config/config.d/custom-keybindings.conf;
+        xdg.configFile."sway/config.d/mode_system.conf".text = import ./config/config.d/mode_system.conf.nix { inherit psCfg; };
         xdg.configFile."sway/config.d/applications.conf".source = ./config/config.d/applications.conf;
         xdg.configFile."sway/config.d/systemd.conf".source = ./config/config.d/systemd.conf;
         xdg.configFile."wayvnc/config".text = import ./config/wayvnc/config.nix { inherit psCfg; inherit pkgs; };

modules/sway/gammastep.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "set color temperature of display according to time of day";

modules/sway/libinput-gestures.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "Actions gestures on your touchpad using libinput";

modules/sway/mako.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "Lightweight Wayland notification daemon";

modules/sway/sway-session.target.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "sway compositor session";

modules/sway/sway.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "sway - SirCmpwn's Wayland window manager";

modules/sway/swayidle.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, psCfg, ... }:
 {
   Unit = {
     Description = "Idle manager for Wayland";
@@ -9,13 +9,19 @@ pkgs:
   };
   Service = {
     Type = "simple";
-    Environment = "PATH=/run/current-system/sw/bin:${pkgs.sway}/bin:${pkgs.swaylock}/bin:${pkgs.swaylock-bg}/bin";
-    ExecStart = ''${pkgs.swayidle}/bin/swayidle -w \
-      timeout 600 'swaylock-bg' \
-      timeout 900 'swaymsg "output * dpms off"' \
-      resume 'swaymsg "output * dpms on"' \
-      before-sleep 'swaylock-bg'
-    '';
+    Environment = "PATH=/run/current-system/sw/bin:${pkgs.sway}/bin";
+    ExecStart =
+      if psCfg.paranoia.enable then ''
+        ${pkgs.swayidle}/bin/swayidle -w \
+        timeout 120 'swaymsg "output * dpms off"' \
+        timeout 150 'systemctl hibernate' \
+      '' else ''
+        ${pkgs.swayidle}/bin/swayidle -w \
+        timeout 600 'swaylock-bg' \
+        timeout 900 'swaymsg "output * dpms off"' \
+        resume 'swaymsg "output * dpms on"' \
+        before-sleep 'swaylock-bg'
+      '';
   };
   Install = {
     WantedBy = [ "sway-session.target" ];

modules/sway/waybar.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "Highly customizable Wayland bar for Sway and Wlroots based compositors.";

modules/sway/xsettingsd.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "X Settings Daemon";

modules/sway/ydotool.service.nix

@@ -1,4 +1,4 @@
-pkgs:
+{ pkgs, ... }:
 {
   Unit = {
     Description = "ydotool - Generic command-line automation tool (no X!)";

pkgs/default.nix

@@ -13,7 +13,7 @@ with final; {
   s = writeShellScriptBin "s" (import ./s.nix final);
   sway-launcher = writeScriptBin "sway-launcher" (import ./sway-launcher.nix final);
   sway-service = writeShellScriptBin "sway-service" (import ./sway-service.nix final);
-  swaylock-bg = writeScriptBin "swaylock-bg" (import ./swaylock-bg.nix final);
+  swaylock-bg = writeShellScriptBin "swaylock-bg" (import ./swaylock-bg.nix final);
   toggle-kbd-layout = writeShellScriptBin "toggle-kbd-layout" (import ./toggle-kbd-layout.nix final);
   uhk-agent = import ./uhk-agent.nix final;
   wcwd = writeShellScriptBin "wcwd" (import ./wcwd.nix final);