Script that auto switches VSCode and Ubuntu themes to Dark or Light mode

my-auto-theme

#!/bin/bash

# Script that auto switches VSCode and Ubuntu themes to Dark or Light
# depending on time of day

# Copy this file to /usr/local/bin/my-auto-theme
# Add following lines to crontab -e
# 0 9 * * * bash /usr/bin/local/my-auto-theme light
# 0 17 * * * bash /usr/bin/local/my-auto-theme dark
# @reboot bash /usr/bin/local/my-auto-theme

set_theme() {
    if [[ "$1" == "dark" ]]; then
        new_gtk_theme="Yaru-dark"
        new_vscode_theme="Visual Studio Dark"
    elif [[ "$1" == "light" ]]; then
        new_gtk_theme="Yaru-light"
        new_vscode_theme="Visual Studio Light"
    else
        echo "[!] Unsupported theme: $1"
        return
    fi

    vscode_settings_file=${HOME}/.config/Code/User/settings.json
    current_vscode_theme=$(jq -r -M '."workbench.colorTheme"' ${vscode_settings_file})
    if [[ ${current_vscode_theme} == ${new_vscode_theme} ]]; then
        echo "[i] Already using vscode '${new_vscode_theme}' theme"
    else
        echo "[-] Setting vscode theme to ${new_vscode_theme}"
        tmp_file=$(mktemp)
        jq -r -M ".\"workbench.colorTheme\" = \"${new_vscode_theme}\"" ${vscode_settings_file} > ${tmp_file}
        mv ${tmp_file} ${vscode_settings_file}
        echo "[✓] vscode theme changed to ${new_vscode_theme}"
    fi
    
    # https://askubuntu.com/a/1234819/895417
    export DBUS_SESSION_BUS_ADDRESS=$DBUS_SESSION_BUS_ADDRESS
    current_gtk_theme=$(gsettings get org.gnome.desktop.interface gtk-theme)
    # echo "[.] Currently using ${current_gtk_theme}"
    if [[ "${current_gtk_theme}" == "'${new_gtk_theme}'" ]]; then
        echo "[i] Already using gtk '${new_gtk_theme}' theme"
    else
        echo "[-] Setting gtk theme to ${new_gtk_theme}"
        gsettings set org.gnome.desktop.interface gtk-theme ${new_gtk_theme}
        echo "[✓] gtk theme changed to ${new_gtk_theme}"
    fi
}


if [[ -z "$1" ]]; then
    currenttime=$(date +%H:%M)
    if [[ "$currenttime" > "17:00" || "$currenttime" < "09:00" ]]; then
        set_theme dark
    else
        set_theme light
    fi
else
    set_theme $1
fi