xmobar: show reboot and .pacnew markers in the updates segment

Red R until the reboot, blue P until the files are merged, read from
update-notify's pending file; markers show alone when there are no updates.

.config/xmobar/updates.sh

@@ -1,7 +1,7 @@
 #!/bin/bash
 # Pending updates for xmobar from update-notify's pending list, e.g. " 15/3 | " (repo/AUR), empty when none
 # Entries already installed are dropped, so the count falls right after an upgrade. Orange from the threshold
-# on, red "K" when a custom kernel needs a rebuild.
+# on, red "K" when a custom kernel needs a rebuild, red "R" when a reboot is needed, blue "P" for .pacnew files.
 # With "list": show the pending packages in a notification (for a click on the bar)
 
 file="${XDG_STATE_HOME:-$HOME/.local/state}/update-notify/pending"
@@ -11,7 +11,7 @@ mapfile -t entries < "$file"
 names=()
 for e in "${entries[@]}"; do
     read -r src pkg _ <<< "$e"
-    [[ $src != threshold ]] && names+=("$pkg")
+    case $src in repo|aur|kernel) names+=("$pkg") ;; esac
 done
 
 declare -A installed
@@ -21,10 +21,15 @@ if (( ${#names[@]} )); then
     done < <(pacman -Q "${names[@]}" 2>/dev/null)
 fi
 
-threshold=0 repo=() aur=() kernel=()
+threshold=0 repo=() aur=() kernel=() pacnew=() reboot=""
+running=$(uname -r)
 for e in "${entries[@]}"; do
     read -r src pkg new <<< "$e"
-    [[ $src == threshold ]] && { threshold=$pkg; continue; }
+    case $src in
+        threshold) threshold=$pkg; continue ;;
+        pacnew) [[ -e ${e#pacnew } ]] && pacnew+=("${e#pacnew }"); continue ;;   # gone once merged
+        reboot) [[ $pkg == "$running" ]] && reboot=$pkg; continue ;;             # gone after the reboot
+    esac
     have=${installed[$pkg]:-}
     [[ -z $have ]] && continue    # removed since the last run
     case $src in
@@ -39,14 +44,19 @@ if [[ ${1:-} == list ]]; then
     (( ${#repo[@]} )) && { printf -v l '%s\n' "${repo[@]}"; body+="Repo:"$'\n'"$l"; }
     (( ${#aur[@]} )) && { printf -v l '%s\n' "${aur[@]}"; body+="AUR:"$'\n'"$l"; }
     (( ${#kernel[@]} )) && { printf -v l 'Rebuild %s\n' "${kernel[@]}"; body+="$l"; }
+    (( ${#pacnew[@]} )) && { printf -v l '%s\n' "${pacnew[@]}"; body+="Merge with pacdiff:"$'\n'"$l"; }
+    [[ -n $reboot ]] && body+="Reboot (running $reboot)"$'\n'
     body=${body%$'\n'}
     notify-send "Pending updates" "${body:-None}"
     exit
 fi
 
 total=$(( ${#repo[@]} + ${#aur[@]} ))
-(( total + ${#kernel[@]} )) || exit 0
+(( total + ${#kernel[@]} + ${#pacnew[@]} )) || [[ -n $reboot ]] || exit 0
-text=$'\xef\x92\x87'" ${#repo[@]}/${#aur[@]}"    # nf-oct-package, as UTF-8 bytes so the locale doesn't matter
+text=$'\xef\x92\x87'    # nf-oct-package, as UTF-8 bytes so the locale doesn't matter
-(( total >= threshold )) && text="<fc=#ffb86c>$text</fc>"
+(( total )) && text+=" ${#repo[@]}/${#aur[@]}"    # markers alone: no "0/0"
+(( total && total >= threshold )) && text="<fc=#ffb86c>$text</fc>"
 (( ${#kernel[@]} )) && text+=" <fc=#f7768e>K</fc>"
+[[ -n $reboot ]] && text+=" <fc=#f7768e>R</fc>"
+(( ${#pacnew[@]} )) && text+=" <fc=#7aa2f7>P</fc>"
 echo "$text | "