[polybar] Add due papers display

Added simple numerical display for papers that are upcoming and due.
Will display ALL due papers, and not distinguish between soon / at some
point yet. Can not yet be interacted with.

polybar/.config/polybar/config

@@ -17,10 +17,8 @@
 ;==========================================================
 
 [colors]
-;background = ${xrdb:color0:#222}
 background = ${xrdb:background}
 background-alt = ${xrdb:color8}
-;foreground = ${xrdb:color7:#222}
 foreground = ${xrdb:foreground}
 foreground-alt = ${xrdb:color3}
 primary = ${xrdb:color1}
@@ -56,7 +54,7 @@ padding-right = 0
 module-margin-left = 2
 
 modules-left = workspaces
-modules-center = mprisdisplay date
+modules-center = mprisdisplay date papersdue
 modules-right = networkspeed archupdates cpu temp backlight volume battery
 ; do not use offsets for the bar, would only work with override-redirect
 ; and will mess up tray https://github.com/polybar/polybar/issues/1355
@@ -85,7 +83,7 @@ fixed-center = true
 ; See the Fonts wiki page for more details
 font-0 = Comic Neue
 font-1 = NotoSans
-font-2 = Iosevka:size=18
+font-2 = Iosevka:size=18;1
 
 cursor-click = pointer
 
@@ -209,13 +207,23 @@ date-alt = %A, %d %B %Y (W %V)
 time-alt = %H:%M
 label = %date% %{T2} %{T-}%time%
 
+[module/papersdue]
+type = custom/script
+exec = $XDG_BIN_HOME/bib_due $BIBFILE | wc -l
+exec-if = type $XDG_BIN_HOME/bib_due
+format-foreground = ${colors.primary}
+format-padding = 2
+format-prefix = " "
+interval = 2
+
 [module/archupdates]
 type = custom/script
 exec = $XDG_CONFIG_HOME/polybar/scripts/poly-archupdates
 interval = 600
 format = <label>
-format-foreground = ${colors.primary}
-label = %output%
+format-padding = 2
+format-prefix = " "
+; format-foreground = ${colors.primary}
 
 [module/networkspeed]
 type = custom/script