Write small custom clock script for bar

Polybar doesn't support time zones yet, so I wrote my own date
displaying script. I think I'll keep it, it is more accurate: 0.02s
instead of up to 5s (configurable but higher frequency means more
CPU power used) latency.

polybar/clock.py

@@ -0,0 +1,63 @@
+#!/usr/bin/env python3
+
+import sys
+from datetime import datetime
+import time
+import pytz
+
+
+if len(sys.argv) < 3:
+    print("Usage: {scriptname} timezone_left timezone_right".format(scriptname=sys.argv[0]), file=sys.stderr)
+    exit(1)
+
+try:
+    tzleft  = pytz.timezone(sys.argv[1])
+    tzright = pytz.timezone(sys.argv[2])
+except pytz.exceptions.UnknownTimeZoneError as e:
+    print('Unknown time zone "{}"'.format(e.args[0]), file=sys.stderr)
+    exit(1)
+
+
+faces = "🕛🕧🕐🕜🕑🕝🕒🕞🕓🕟🕔🕠🕕🕡🕖🕢🕗🕣🕘🕤🕙🕥🕚🕦"
+
+def face_for(t):
+    minute = (t.minute + 15) // 30
+    hour   = (t.hour + 0 if minute < 45 else 1) % 12
+
+    return faces[2*hour + minute]
+
+
+def color_for(t):
+    if t.hour < 5 or t.hour > 22:
+        return "888"
+    elif t.hour < 10:
+        return "DB9"
+    elif t.hour < 14:
+        return "DDB"
+    elif t.hour < 19:
+        return "DDD"
+    else:
+        return "D9B"
+
+
+while True:
+    utcnow   = datetime.now(tz=pytz.utc)
+    localnow = datetime.now()
+    leftnow  = utcnow.astimezone(tzleft )
+    rightnow = utcnow.astimezone(tzright)
+    print(
+        "%{T2}%{F#" + color_for(leftnow) + "}" +
+        face_for(leftnow) +
+        "%{F}%{T-}         " +
+
+        localnow.strftime("%A       %%{T4}%%{F"+color_for(localnow)+"}%H:%M%%{F}%%{T-}     %d %b") +
+
+        "         %{T2}%{F#" + color_for(rightnow) + "}" +
+        face_for(rightnow) +
+        "%{F}%{T-}",
+
+        flush = True
+    )
+
+    delay = 60 - localnow.second - (localnow.microsecond * 10e-7)
+    time.sleep(delay)

polybar/config.ini

@@ -37,8 +37,8 @@ module-margin-right = 6
 
 ; Default text
 font-0  = "Fira Sans:size=10;1"
-; TODO unused
-font-1  = fixed:pixelsize=10;1
+; Other timezones clock symbols
+font-1  = "Noto Sans Symbols2:size=16;4"
 ; Default icons
 font-2  = "Material Icons:pixelsize=14;3"
 ; Clock text
@@ -317,17 +317,23 @@ interval = 3.0
 ;label-connected = "↑%{T5}%upspeed%%{T-}  %{T5}↓%downspeed%%{T-}"
 label-connected = "%{O-32}"
 
+;[module/date]
+;type = internal/date
+;interval = 5
+
+;date =
+;date-alt =
+
+;time = %A       %{T4}%H:%M%{T-}     %e %b
+;time-alt = %a  %Y-%m-%d    %H:%M:%S
+
+;label = %time%
+
 [module/date]
-type = internal/date
-interval = 5
+type = custom/script
+tail = true
 
-date =
-date-alt =
-
-time = %A       %{T4}%H:%M%{T-}     %e %b
-time-alt = %a  %Y-%m-%d    %H:%M:%S
-
-label = %time%
+exec = ~/.config/polybar/clock.py America/Detroit Asia/Seoul
 
 [module/volume]
 type = internal/volume