Change wallpaper based on hour of the day

scripts/dynamic-wallpaper.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# get todays md5sum and extract first 2 chars then convert it to base 10
+todays_hash=$(date +%x | md5sum | cut -c 1-2)
+base10=$(echo "ibase=16;$todays_hash" | bc)
+
+# calculate the index for the wallpaper set: base10 % num_of_dirs
+dirs=$(find ~/Pictures/Wallpapers/time-based/* -maxdepth 1 -type d)
+num_of_dirs=$(echo "${dirs}" | wc -l)
+index=$(echo "${base10} % ${num_of_dirs} + 1" | bc) 
+wallpaper_set=$(echo "${dirs}"| sed -n "${index}p")
+
+# get the file path based on the current hour of the day
+num=$(date +%-H)
+image="$wallpaper_set/$num"
+if [[ -f "${image}.png" ]]; then
+    format="png"
+elif [[ -f "${image}.jpg" ]]; then
+    format="jpg"
+else
+    notify-send "Could not find any image for $image"
+fi
+path="$wallpaper_set/$num.$format"
+echo "path: $path"
+
+# if the file is not a symlink, set the new wallpaper
+if [[ ! -L "$path" ]];
+then
+  wal -st -i $path --backend=haishoku
+  python3 ~/scripts/misc/adjust_terminal_colors.py rgb 0.5
+  ~/scripts/misc/restart_dunst.sh
+  xrdb ~/.Xresources
+fi