Comment by WoodenChair

The author suggests using git. But be warned git doesn’t work well with iCloud Drive. I used to have hundreds of git repositories in my iCloud Drive. Periodically, doing a big commit would trigger my whole multi-hundred gigabyte iCloud Drive to resync with Apple’s servers. This would take a day to complete. I went through Apple support up to quite a high level to try to resolve it and they never did. Now I keep my git repositories outside of iCloud Drive. The trigger seems to be if you ever change hundreds of files at the same time in quick succession before the last set of big changes finished syncing.