[lldb-dev] Moving pexpect and unittest2 to lldb/third_party

Tamas Berghammer via lldb-dev lldb-dev at lists.llvm.org
Thu Oct 22 02:55:24 PDT 2015

Hi Zach,

I think nobody is using the "if __name__ == '__main__'" block as executing
a test file directly isn't working at the moment (the "import lldb" command
fails). If you plan to change all test file then I would prefer to remove
the reference to unittest2 from them for simplicity if nobody have an
objection against it.


On Wed, Oct 21, 2015 at 8:57 PM Zachary Turner via lldb-dev <
lldb-dev at lists.llvm.org> wrote:

> *TL;DR - Nobody has to do anything, this is just a heads up that a 400+
> file CL is coming.*
> IANAL, but I've been told by one that I need to move all third party code
> used by LLDB to lldb/third_party.  Currently there is only one thing there:
> the Python `six` module used for creating code that is portable across
> Python 2 and Python 3.
> The only other 2 instances that I'm aware of are pexpect and unittest2,
> which are under lldb/test.  I've got some patches locally which move
> pexpect and unittest2 to lldb/third_party.  I'll hold off on checking them
> in for a bit to give people a chance to see this message first, because
> otherwise you might be surprised when you see a CL with 400 files being
> checked in.
> Nobody will have to do anything after this CL goes in, and everything
> should continue to work exactly as it currently does.
> The main reason for the churn is that pretty much every single test in
> LLDB does something like this:
> *import unittest2*
> ...
> if __name__ == '__main__':
>     import atexit
>     lldb.SBDebugger.Initialize()
>     atexit.register(lambda: lldb.SBDebugger.Terminate())
>     *unittest2.main()*
> This worked when unittest2 was a subfolder of test, but not when it's
> somewhere else.  Since LLDB's python code is not organized into a standard
> python package and we treat the scripts like dotest etc as standalone
> scripts, the way I've made this work is by introducing a module called *lldb_shared
> *under test which, when you import it, fixes up sys.path to correctly add
> all the right locations under lldb/third_party.
> So, every single test now needs a line at the top to import lldb_shared.
> TBH I don't even know if we need this unittest2 stuff anymore (does anyone
> even use it?)  but even if the answer is no, then that still means changing
> every file to delete the import statement and the if __name__ ==
> '__main__': block.
> If there are no major concerns I plan to check this in by the end of the
> day, or tomorrow.
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