[Boost-testing] Why both tools_bb and tools_bjam?

Subject: [Boost-testing] Why both tools_bb and tools_bjam?
From: Steve M. Robbins (steve_at_[hidden])
Date: 2012-02-13 00:41:12

Hi,

Anyone know the reason that "run.py" checks out the bjam sources twice?
One in "tools_bjam" and one in "tools_bb/engine"?

Snip of run.py output:

# Getting Boost.Build v2...
# Executing SVN command "svn --non-interactive co http://svn.boost.org/svn/boost/trunk/tools/build/v2 tools_bb"
Checked out revision 77003.
# Getting Boost.Jam...
# Executing SVN command "svn --non-interactive co http://svn.boost.org/svn/boost/trunk/tools/build/v2/engine tools_bjam"
Checked out revision 77003.

Thanks,
-Steve