match-terminal-app-theme-darkmode.sh

#!/bin/sh

# Change the settings profile of all open Terminal.app windows to match the
# current system interface style (dark or light). By default, the "Pro" and
# "Novel" profiles are used for dark and light mode, respectively. You can
# override these defaults with the --dark and --light options.
#
# I use this to sync all my terminal windows with the automatic dark/light
# mode setting in macOS.
#
# Usage:
#   match-terminal-app-theme-darkmode.sh [--dark <profile_name>] [--light <profile_name>]
#
# Usage with dark-mode-notify (https://github.com/bouk/dark-mode-notify):
#   dark-mode-notify match-terminal-app-theme-darkmode.sh --dark "Gruvbox Dark" --light "Gruvbox Light"
#
# Or in a crontab hack if you don't have the build tools for dark-mode-notify:
#   # Note: This runs every minute, but I don't think this is an issue.
#   #       Use dark-mode-notify if this feels too icky.
#   * * * * * /Users/fabian/bin/match-terminal-app-theme-darkmode.sh --dark "Solarized Dark" --light "Solarized Light"

set -e

dark_profile_name="Pro"
light_profile_name="Novel"

while [ $# -gt 0 ]; do
    case "$1" in
        --dark)
            dark_profile_name="$2"
            shift 2
            ;;
        --light)
            light_profile_name="$2"
            shift 2
            ;;
        *)
            break
            ;;
    esac
done

set +e
interface_style=$(defaults read -g AppleInterfaceStyle 2>/dev/null)
set -e

if [ "$interface_style" = "Dark" ]; then
    profile_name="$dark_profile_name"
else
    profile_name="$light_profile_name"
fi

current_profile_name=$(osascript -e "tell application \"Terminal\" to get name of default settings")

if [ "$current_profile_name" = "$profile_name" ]; then
    exit 0
fi

# reset default profile for any new windows that open
osascript -e "tell application \"Terminal\" to set default settings to settings set \"$profile_name\""

# sync the profile of any open windows
osascript -e "tell application \"Terminal\"
    repeat with w in windows
        set current settings of w to settings set \"$profile_name\"
    end repeat
end tell"