In order to migrate code bases efficiently to the css logical properties, one should use a migration tool.

There is already a way to parse CSS with https://github.com/servo/rust-cssparser.
What we need is simply to replace some of its value :)

There is also a simple find-and-replace example with a gist: https://gist.github.com/cchaos/acfd24d603acd5f176766ab86b5dd1d5.