/usr/share/python/runtime.d/ibus.rtupdate is in ibus 1.4.1-3ubuntu1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | #! /bin/sh
set -e
if [ "$1" = rtupdate ]; then
pyclean -p ibus /usr/share/ibus
pycompile -p ibus /usr/share/ibus
fi
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