iTerm2 console script to change color preset based on time

darknight.py

#!/usr/bin/env python3.7

# Daemon script for iTerm2, to change color preset based on time of day
# Simpler than https://iterm2.com/python-api/examples/darknight.html#darknight-example


import asyncio
import datetime
import iterm2


HALFHOUR_IN_SECONDS = 30 * 60
SECONDS_UNTIL_NEXT_CHECK = HALFHOUR_IN_SECONDS

# Clock time to change colors.
LIGHT_TIME_HOUR = 7
DARK_TIME_HOUR = 20

# Color presets to use
LIGHT_PRESET_NAME = "Tango Light"
DARK_PRESET_NAME = "Pastel (Dark Background)"

# Profiles to update
# PROFILES=["Default"]
PROFILES = ["Copy of Default"]


def get_current_hour():
    return datetime.datetime.now().hour


async def set_colors(connection, preset_name):
    print("Change to preset {}".format(preset_name))
    preset = await iterm2.ColorPreset.async_get(connection, preset_name)
    for partial in await iterm2.PartialProfile.async_query(connection):
        if partial.name in PROFILES:
            await partial.async_set_color_preset(preset)


async def main(connection):
    last_preset_name = None
    while True:
        print("Checking time for color preset")
        if LIGHT_TIME_HOUR <= datetime.datetime.now().hour < DARK_TIME_HOUR:
            preset_name = LIGHT_PRESET_NAME
        else:
            preset_name = DARK_PRESET_NAME
        if preset_name != last_preset_name:
            await set_colors(connection, preset_name)
            last_preset_name = preset_name

        await asyncio.sleep(SECONDS_UNTIL_NEXT_CHECK)


iterm2.run_forever(main)