Created
August 15, 2017 21:43
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I use Karabiner to swap the `Command` and `Option` keys when I have an external keyboard plugged in. It's so annoying to have to manually switch the profile, though, so this script does it for me automatically, whenever I add or remove the keyboard (or when the device wakes, in case it was added or removed while it was asleep).
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| function switchProfile(profile) | |
| local karabiner = "'/Library/Application Support/org.pqrs/Karabiner-Elements/bin/karabiner_cli' --select-profile " | |
| print('Switching profile to "' .. profile .. '"') | |
| hs.execute(karabiner .. "'" .. profile .. "'"); | |
| end | |
| function isKeyboard(device) | |
| return string.find(device["productName"], 'Keyboard') ~= nil | |
| end | |
| function usbDeviceCallback(data) | |
| if (isKeyboard(data)) then | |
| if (data["eventType"] == "added") then | |
| switchProfile('External') | |
| elseif (data["eventType"] == "removed") then | |
| switchProfile('Internal') | |
| end | |
| end | |
| end | |
| function runCheck() | |
| local usb_table = hs.usb.attachedDevices() | |
| for index, usb_device in pairs(usb_table) do | |
| if (isKeyboard(usb_device)) then | |
| return switchProfile('External') | |
| end | |
| end | |
| switchProfile('Internal') | |
| end | |
| runCheck() | |
| hs.usb.watcher.new(usbDeviceCallback):start() | |
| hs.caffeinate.watcher.new(runCheck):start() |
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