feat: wallpaper_random

home/linux/desktop/default.nix

@@ -1,5 +1,7 @@
 {pkgs, ...}: {
   imports = [
+    ./wallpaper
+
     ./creative.nix
     ./immutable-file.nix
     ./media.nix

home/linux/desktop/wallpaper/default.nix

@@ -0,0 +1,9 @@
+{ wallpapers, ... }:
+
+{
+  home.file.".config/wallpapers".source = wallpapers;
+  home.file.".local/bin/wallpaper_random" = {
+    source = ./wallpaper_random.py;
+    executable = true;
+  };
+}

home/linux/desktop/wallpaper/wallpaper_random.py

@@ -0,0 +1,90 @@
+#!/usr/bin/env python3
+
+import os
+import time
+import random
+from pathlib import Path
+import subprocess
+
+WALLPAPERS_DIR = "~/.config/wallpapers"
+LAST_WALLPAPER_FILE = "/tmp/my_last_wallpaper"
+IMAGE_EXTENSIONS = (
+    ".jpg",
+    ".jpeg",
+    ".png",
+    # ".gif",
+    # ".webp"
+)
+
+
+def get_random_wallpaper():
+    wallpapers_dir = Path(WALLPAPERS_DIR).expanduser()
+    last_wallpaper_file = Path(LAST_WALLPAPER_FILE)
+    if last_wallpaper_file.exists():
+        last_wallpaper = Path(last_wallpaper_file.read_text().strip())
+        print("Last wallpaper:", last_wallpaper)
+    else:
+        last_wallpaper = None
+
+    wallpapers = [
+        p for p in Path(wallpapers_dir).glob("*") if p.suffix in IMAGE_EXTENSIONS
+    ]
+    print("Found wallpaper:")
+    for p in wallpapers:
+        if p == last_wallpaper:
+            print("  ", p, "(skipped)")
+            wallpapers.remove(p)
+        else:
+            print("  ", p)
+    if not wallpapers:
+        raise RuntimeError("No wallpapers found!")
+
+    w = random.choice(wallpapers)
+    print("Selected wallpaper:", w)
+    last_wallpaper_file.write_text(str(w))
+    return w
+
+
+def set_wallpaper_x11(path):
+    subprocess.run(["feh", "--bg-fill", path])
+
+
+def set_wallpaper_wayland(path):
+    # find all swaybg processes
+    swaybg_pids = subprocess.run(
+        ["pgrep", "-f", "swaybg"], stdout=subprocess.PIPE
+    ).stdout.decode("utf-8")
+
+    # run swaybg in the background, and make it running even after the parent process exits
+    subprocess.Popen(
+        ["swaybg", "--output", "*", "--mode", "fill", "--image", path],
+        start_new_session=True,
+    )
+    time.sleep(1)
+
+    # kill all old swaybg processes
+    for pid in swaybg_pids.splitlines():
+        try:
+            os.kill(int(pid), 9)
+        except ProcessLookupError:
+            pass
+
+
+def set_wallpaper(path):
+    # check if we are running under x11 or wayland
+    if (
+        "WAYLAND_DISPLAY" in os.environ
+        or os.environ.get("XDG_SESSION_TYPE") == "wayland"
+    ):
+        set_wallpaper_wayland(path)
+    else:
+        set_wallpaper_x11(path)
+
+
+def main():
+    wallpaper = get_random_wallpaper()
+    set_wallpaper(wallpaper)
+
+
+if __name__ == "__main__":
+    main()

home/linux/hyprland/default.nix

@@ -1,4 +1,4 @@
-{pkgs, catppuccin-hyprland, wallpaper, ...}: {
+{pkgs, catppuccin-hyprland, ...}: {
   imports = [
     ./wayland-apps.nix
   ];
@@ -14,9 +14,7 @@
     # copy the scripts directory recursively
     recursive = true;
   };
-  home.file.".config/hypr-themes".source = "${catppuccin-hyprland}/themes";
-
-  home.file.".config/hypr/wallpapers/wallpaper".source = wallpaper;
+  home.file.".config/hypr/themes".source = "${catppuccin-hyprland}/themes";
 
   # gtk's theme settings, generate files: 
   #   1. ~/.gtkrc-2.0

home/linux/hyprland/hypr-conf/hyprland.conf

@@ -1,7 +1,7 @@
 ## Hyprland configuration file
 
 # color-scheme: cappuccin-mocha
-source=~/.config/hypr-themes/mocha.conf
+source=~/.config/hypr/themes/mocha.conf
 
 #-- Output ----------------------------------------------------
 # Configure your Display resolution, offset, scale and Monitors here, use `hyprctl monitors` to get the info.

home/linux/hyprland/hypr-conf/scripts/startup

@@ -11,7 +11,7 @@ for _prs in "${_ps[@]}"; do
 done
 
 # Set wallpaper
-swaybg --output '*' --mode fill --image ~/.config/hypr/wallpapers/wallpaper &
+swaybg --output '*' --mode fill --image ~/.config/wallpapers/default_wallpaper &
 
 # Lauch notification daemon (mako)
 ~/.config/hypr/scripts/notifications &

home/linux/i3/config

@@ -262,7 +262,7 @@ exec --no-startup-id ~/.screenlayout/monitor.sh
 
 # set wallpaper
 # exec --no-startup-id sleep 2 && nitrogen --restore
-exec --no-startup-id sleep 1 && feh --bg-fill ~/.config/i3/wallpaper
+exec --no-startup-id sleep 1 && feh --bg-fill ~/.config/wallpapers/default_wallpaper
 
 # set powersavings for display:
 exec --no-startup-id xset s 480 dpms 600 600 600

home/linux/i3/default.nix

@@ -1,4 +1,4 @@
-{ pkgs, wallpaper, ...}: {
+{ pkgs, ...}: {
   # i3 window manager's config, based on https://github.com/endeavouros-team/endeavouros-i3wm-setup
 
   imports = [
@@ -6,8 +6,6 @@
   ];
 
   home.file = {
-    # wallpaper, binary file
-    ".config/i3/wallpaper".source = wallpaper;
     ".config/i3/config".source = ./config;
     ".config/i3/i3blocks.conf".source = ./i3blocks.conf;
     ".config/i3/scripts" = {