From 46992c46d6521dd74c81a937ad1c1465578cbe30 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Benjamin=20B=C3=A4dorf?= <hello@benjaminbaedorf.eu>
Date: Sun, 14 Aug 2022 19:59:01 +0200
Subject: [PATCH] Add parameter for swapfile offset

---
 modules/core/boot.nix                         | 21 +++++++++++-
 .../sway/config/config.d/mode_system.conf.nix | 32 +++++++++----------
 2 files changed, 36 insertions(+), 17 deletions(-)

diff --git a/modules/core/boot.nix b/modules/core/boot.nix
index 1512289c..9df859e2 100644
--- a/modules/core/boot.nix
+++ b/modules/core/boot.nix
@@ -22,6 +22,18 @@ in
       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.number;
+      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 = {
@@ -38,7 +50,14 @@ in
         };
       };
 
-      resumeDevice = mkIf cfg.hibernation.enable "/swapfile";
+
+      resumeDevice = mkIf cfg.hibernation.enable cfg.hibernation.resumeDevice;
+      kernelParams = mkIf cfg.hibernation.enable [
+        "resume=${cfg.hibernation.resumeDevice}"
+      ] ++ (
+        if (cfg.hibernation.resumeOffset == null) then builtins.abort "config.pub-solar.hibernation.resumeOffset has to be set if config.pub-solar.hibernation.enable is true."
+        else [ "resume_offset=${cfg.hibernation.resumeOffset}" ]
+      );
 
       loader.systemd-boot.enable = true;
 
diff --git a/modules/sway/config/config.d/mode_system.conf.nix b/modules/sway/config/config.d/mode_system.conf.nix
index ef11a461..c505a9f5 100644
--- a/modules/sway/config/config.d/mode_system.conf.nix
+++ b/modules/sway/config/config.d/mode_system.conf.nix
@@ -1,21 +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.allow-hibernation then ''
-    bindsym h exec systemctl hibernate, mode "default"
+  # 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"
++ (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"
+      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"
-}
+      # exit system mode: "Enter" or "Escape"
+      bindsym Return mode "default"
+      bindsym Escape mode "default"
+  }
 ''