Private.xml definition for switching between english/russian input sources depending on which keyboard I'm using. (I may switch this over to the right cmd key so that I can manually switch layouts around, for example, if I want to be able to switch between english/russian easily)

private.xml

<?xml version="1.0"?>
<!-- private.xml definition for Karabiner - https://pqrs.org/osx/karabiner/index.html.en -->
<root>
  <inputsourcedef>
    <name>MY_RUSSIAN</name>
    <inputsourceid_prefix>com.apple.keylayout.Russian</inputsourceid_prefix>
  </inputsourcedef>

  <inputsourcedef>
    <name>MY_ENGLISH</name>
    <inputsourceid_prefix>com.apple.keylayout.US</inputsourceid_prefix>
  </inputsourcedef>

  <vkchangeinputsourcedef>
    <name>KeyCode::VK_CHANGE_INPUTSOURCE_MY_RUSSIAN</name>
    <inputsourceid_equal>com.apple.keylayout.Russian</inputsourceid_equal>
  </vkchangeinputsourcedef>

  <vkchangeinputsourcedef>
    <name>KeyCode::VK_CHANGE_INPUTSOURCE_MY_ENGLISH</name>
    <inputsourceid_equal>com.apple.keylayout.US</inputsourceid_equal>
  </vkchangeinputsourcedef>

  <!-- If we're on the russian keyboard, and our input source is currently english, then a tap of the
    -- left command key will change the input source to russian, and then left-command goes back to
    -- its normal usages -->
  <item>
    <name>Russian Keyboard Russian Input Source</name>
    <identifier>private.my_russian_keyboard_to_russian</identifier>
    <inputsource_only>MY_ENGLISH</inputsource_only>
    <device_only>DeviceVendor::APPLE_COMPUTER, DeviceProduct::APPLE_WIRELESS_KEYBOARD_0x0256</device_only>
    <autogen>
      __KeyToKey__
      KeyCode::COMMAND_L,
      KeyCode::COMMAND_L,
      KeyCode::VK_CHANGE_INPUTSOURCE_MY_RUSSIAN
    </autogen>
  </item>

  <!-- If we're on the english keyboard (the magic keyboard in this case), and our input source is
    -- currently russian, then a tap of the left command key will change the input source to russian,
    -- and then left-command goes back to its normal usages -->
  <item>
    <name>English Keyboard English Input Source</name>
    <identifier>private.my_english_keyboard</identifier>
    <inputsource_only>MY_RUSSIAN</inputsource_only>
    <device_only>DeviceVendor::Apple_Bluetooth, DeviceProduct::MAGIC_KEYBOARD</device_only>
    <autogen>
      __KeyToKey__
      KeyCode::COMMAND_L,
      KeyCode::COMMAND_L,
      KeyCode::VK_CHANGE_INPUTSOURCE_MY_ENGLISH
    </autogen>
  </item>
</root>