[bibtex] Add priority filtering to bib-due

Can filter by priority using `-p` option, script will then go down the
list and display only paper of this priority or higher.

For example priority 3 will display 3,2,1 but not those without;
priority 1 will only display 1

polybar/.config/polybar/config

@@ -224,11 +224,12 @@ click-right = kill -USR2 %pid%
 ; display information on remaining papers to read for the upcoming week
 [module/papersdue]
 type = custom/script
-exec = bib-due -u $(date --date='fri this week' +%Y-%m-%d) | wc -l
+exec = $XDG_CONFIG_HOME/polybar/scripts/poly-papersdue
 exec-if = type bib-due
-click-left = exist rofi-bib-due normal "opening due papers" && rofi-bib-due -u $(date --date='fri this week' +%Y-%m-%d)
-format-foreground = ${colors.primary}
-format-prefix = ""
+tail = true
+click-left = exist rofi-bib-due normal "opening due papers" && rofi-bib-due -p1 -u $(date --date='fri this week' +%Y-%m-%d)
+; format-foreground = ${colors.primary}
+format-prefix = " "
 interval = 120
 
 ; display unified available packages for update on arch from repos/aur

polybar/.config/polybar/scripts/poly-papersdue

@@ -0,0 +1,15 @@
+#!/usr/bin/env sh
+
+while true; do
+  all="$(bib-due -u "$(date --date='fri this week' +%Y-%m-%d)" | wc -l)"
+  required="$(bib-due -u "$(date --date='fri this week' +%Y-%m-%d)" -p1 | wc -l)"
+
+  # add polybar formatting to color required readings red
+  # https://github.com/polybar/polybar/wiki/Formatting#format-tags
+  # TODO use xresources
+  colorreq=$(xrdb -query | grep -e '\*color1:' | cut -f2)
+  colorall=$(xrdb -query | grep -e '\*foreground:' | cut -f2)
+  printf "%s%s%s(%s)\n" "%{F${colorall:-#000}}" "$all" "%{F${colorreq:-#d00}}" "$required"
+
+  sleep 120
+done