These days, I'm migrating Subversion repositories to Git.

I've followed this blog post that hasn't failed my so far.

However, today, this command
git svn clone https://svn.mysite.com/repo --authors-file=users.txt --no-metadata --stdlayout repofailed because of a mysterious "(no author)".

The explanation is that Subversion seems allow a check-in by no one. Classically, the first check-in on Google Code for instance.

To solve it, just add
(no author) = Joe Smith <joe.smith@gmail.com>
at the end of your user file. The person should obviously be a meaningful one (like the guy who has created the project on Google Code).