added automatic wallpaper setting

configuration.nix

@@ -25,7 +25,12 @@
   # networking.proxy.noProxy = "127.0.0.1,localhost,internal.domain";
 
   # Enable networking
-  networking.networkmanager.enable = true;
+  networking.networkmanager = {
+    enable = true;
+    plugins = with pkgs; [
+      networkmanager-openvpn
+    ];
+  };
 
   # Set your time zone.
   time.timeZone = "America/Chicago";

scripts/wallpaper-watch.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+WP_DIR="$HOME/Pictures/Wallpapers"
+aspect_name() {
+  local w="$1"
+  local h="$2"
+  local a="$w"
+  local b="$h"
+  local t
+  local aspect
+
+  while (( b != 0 )); do
+    t=$b
+    b=$(( a % b ))
+    a=$t
+  done
+
+  aspect="$(( w / a ))x$(( h / a ))"
+
+  case "$aspect" in
+    64x27|43x18)
+      echo "21x9"
+      ;;
+    8x5)
+      echo "16x10"
+      ;;
+    *)
+      echo "$aspect"
+      ;;
+  esac
+}
+
+process_wallpapers() {
+  wallpapers=()
+  while read -r line; do
+    if [[ "$line" == *"+*"* ]]; then
+      role="primary"
+    else
+      role="secondary"
+    fi
+  
+    geom="$(awk '{print $3}' <<< "$line")"
+  
+    width="${geom%%/*}"
+    rest="${geom#*x}"
+    height="${rest%%/*}"
+  
+    aspect="$(aspect_name "$width" "$height")"
+    wallpapers+=("$WP_DIR/$aspect-$role.png")
+  done < <(xrandr --listmonitors | tail -n +2)
+  
+  count="${#wallpapers[@]}"
+  
+  modes=()
+  for (( i=0; i<${#wallpapers[@]}; i++ )); do
+    modes+=("zoom")
+  done
+
+  echo "${wallpapers[@]}"
+
+  hydrapaper --cli "${wallpapers[@]}" --mode "${modes[@]}"
+}
+
+last_applied=""
+pending=""
+
+while true; do
+    current="$(xrandr --query 2>/dev/null | grep ' connected' || true)"
+
+    if [[ "$current" != "$pending" ]]; then
+        pending="$current"
+    elif [[ "$current" != "$last_applied" ]]; then
+        last_applied="$current"
+        process_wallpapers
+    fi
+
+    sleep 1
+done

users/cybrneko.nix

@@ -1,6 +1,10 @@
 { config, lib, pkgs, ... }:
 
 {
+  imports = [
+    ../utilities/autowallpaper.nix
+  ];
+  
   home.activation.createAudioDirectories =
     lib.hm.dag.entryAfter [ "writeBoundary" ] ''
       mkdir -p \

utilities/autowallpaper.nix

@@ -0,0 +1,29 @@
+{ config, pkgs, ... }:
+
+let
+  wallpaperWatch = pkgs.writeShellScriptBin "wallpaper-watch"
+    (builtins.readFile ../scripts/wallpaper-watch.sh);
+in
+{
+  home.packages = [
+    wallpaperWatch
+  ];
+
+  systemd.user.services.wallpaper-watcher = {
+    Unit = {
+      Description = "Dynamic wallpaper watcher";
+      After = [ "graphical-session.target" ];
+      PartOf = [ "graphical-session.target" ];
+    };
+
+    Service = {
+      ExecStart = "${wallpaperWatch}/bin/wallpaper-watch";
+      Restart = "always";
+      RestartSec = 2;
+    };
+
+    Install = {
+      WantedBy = [ "graphical-session.target" ];
+    };
+  };
+}