how to give id to repo?

[Matthieu Moy]

"Vadim Gelfer" <vadim.gelfer at gmail.com> writes:

> for history merge changes, i want to compute id for repo that will
> give one answer if two repos are "same".

Just my 2 cents:

This is not necessarily mandatory. In bzr for example, AAUI, any
branch virtually starts with the empty revision, which is common to
all branches in the universe. Creating a project is equivalent to
branching from the empty revision.

-- 
Matthieu