prometheus_exporters: Improve arch-textcollector

Add number of pacnew/pacsave files and print non explicit installed
optdepends as orphans as well.

roles/prometheus_exporters/files/arch-textcollector.sh

@@ -18,8 +18,9 @@ trap "rm -f $TMP_FILE" EXIT
 
 updates=$(/usr/bin/checkupdates | wc -l)
 secupdates=$(/usr/bin/arch-audit -u | wc -l)
-orphans=$(/usr/bin/pacman -Qdtq | wc -l)
+orphans=$(/usr/bin/pacman -Qdttq | wc -l)
 foreigns=$(/usr/bin/pacman -Qmq | wc -l)
+pacnew=$(/usr/bin/pacdiff -o | wc -l)
 
 echo "# HELP pacman_updates_pending number of pending updates from pacman" >> $TMP_FILE
 echo "# TYPE pacman_updates_pending gauge" >> $TMP_FILE
@@ -37,4 +38,8 @@ echo "# HELP pacman_foreigns number of foreign packages from pacman" >> $TMP_FIL
 echo "# TYPE pacman_foreigns gauge" >> $TMP_FILE
 echo "pacman_foreigns $foreigns" >> $TMP_FILE
 
+echo "# HELP pacman_pacnew number of pacnew/pacsave files" >> $TMP_FILE
+echo "# TYPE pacman_pacnew gauge" >> $TMP_FILE
+echo "pacman_pacnew $pacnew" >> $TMP_FILE
+
 mv -f $TMP_FILE $PROM_FILE