This small utility for Apple OS X allows to easily switch input sources from a command line. It's main purpose is to be used as a service in vim-xkbswitch plugin.

issw [-h] [-l] [<input-source-id>]
-h - show help message
-l - list all selectable input sources
-V - print version number
If no arguments are specified, it prints the current input source.
If <input-source-id> is specified, it selects the specified input source.

git clone https://github.com/vovkasm/input-source-switcher.git
cd input-source-switcher
cmake -B build
cmake --build build
cmake --install build

cd input-source-switcher
mkdir xcode && cd xcode
cmake -G Xcode ..
open InputSourceSwitcher.xcodeproj

There is an old bug in macOS related to handling input sources for CJK languages. If you're using the default APIs, when switching languages from the command line (i.e., without creating a GUI application), the switch won't work correctly for languages with composite input (like Japanese and Chinese). @laishulu has implemented a workaround for this issue in his implementation of a similar utility, available at https://github.com/laishulu/macism. If this issue affects you, it's worth checking out his project.

Vladimir Timofeev

This projected is licensed under the terms of the MIT license.