Hello Petr,
I'm trying to checkout einsteintoolkit on my work station and it's asking for some password. I didn't experienced this problem before. What I should enter for the password?
There is no required password for a read-only checkout.
Most likely you forgot to add the "-a" option to GetComponents. Without it it tries a authorized checkout and then will eventually ask you for a password (most likely carpetmercurial@carpetcode.org or so).
If adding "-a" does not help, would you mind running GetComponents with the -v option and including its output in your email, please? That might help narrow down the problem.
Yours, Roland