hyprpaper randomizer

home/features/cli/default.nix

@@ -73,6 +73,7 @@
     go
     htop
     httpie
+    hyprpaper-random
     jq
     just
     lazygit

home/features/desktop/hyprland.nix

@@ -8,6 +8,7 @@
       exec-once = [
         "hyprpanel"
         "hyprpaper"
+        "hyprpaper-random"
         "hypridle"
         "wl-paste --type text --watch cliphist store" # Stores only text data
         "wl-paste --type image --watch cliphist store" # Stores only image data "wl-paste -p -t text --watch clipman store -P --histpath=\"~/.local/share/clipman-primary.json\""

pkgs/default.nix

@@ -1,5 +1,6 @@
 {pkgs, ...}: {
   # Define your custom packages here
+  hyprpaper-random = pkgs.callPackage ./hyprpaper-random {};
   msty = pkgs.callPackage ./msty {};
   msty-sidecar = pkgs.callPackage ./msty-sidecar {};
   zellij-ps = pkgs.callPackage ./zellij-ps {};

pkgs/hyprpaper-random/default.nix

@@ -0,0 +1,72 @@
+{
+  lib,
+  stdenv,
+  writeShellScriptBin,
+  fd,
+  hyprland,
+  coreutils,
+  gawk,
+}: let
+  script = writeShellScriptBin "hyprpaper-random" ''
+    #!/usr/bin/env bash
+    set -euo pipefail
+
+    # Directory (override with WALLPAPER_DIR)
+    DIR="''${WALLPAPER_DIR:-''${XDG_CONFIG_HOME:-$HOME/.config}/hypr/wallpapers}"
+
+    HYPRCTL="${hyprland}/bin/hyprctl"
+    FD="${fd}/bin/fd"
+    SHUF="${coreutils}/bin/shuf"
+    TR="${coreutils}/bin/tr"
+    AWK="${gawk}/bin/awk"
+
+    # Pick one random image (null-safe)
+    WALLPAPER="$(
+      "$FD" . "$DIR" -t f -e jpg -e jpeg -e png -e webp -e avif -0 --follow --hidden \
+        | "$SHUF" -z -n1 \
+        | "$TR" -d '\0'
+    )"
+
+    if [[ -z "''${WALLPAPER:-}" ]]; then
+      echo "No wallpapers found in: $DIR" >&2
+      exit 1
+    fi
+
+    # Preload so hyprpaper can use it
+    "$HYPRCTL" hyprpaper preload "$WALLPAPER" >/dev/null 2>&1 || true
+
+    # Apply to all monitors
+    "$HYPRCTL" monitors \
+      | "$AWK" '/^Monitor /{print $2}' \
+      | while IFS= read -r mon; do
+          [ -n "$mon" ] && "$HYPRCTL" hyprpaper wallpaper "$mon,$WALLPAPER"
+        done
+
+    exit 0
+  '';
+in
+  stdenv.mkDerivation {
+    pname = "hyprpaper-random";
+    version = "0.1.1";
+
+    dontUnpack = true;
+
+    buildInputs = [
+      fd
+      hyprland
+      coreutils
+      gawk
+    ];
+
+    installPhase = ''
+      mkdir -p "$out/bin"
+      ln -s ${script}/bin/hyprpaper-random "$out/bin/hyprpaper-random"
+    '';
+
+    meta = with lib; {
+      description = "Minimal random wallpaper setter for Hyprpaper";
+      license = licenses.mit;
+      platforms = platforms.linux;
+      mainProgram = "hyprpaper-random";
+    };
+  }