pure-python mercurial

[TK Soh]

On Wed, Mar 4, 2009 at 1:34 AM, Matt Mackall <mpm at selenic.com> wrote:
> On Wed, 2009-03-04 at 00:59 +0000, TK Soh wrote:
>> I read this in the UpcomingReleaseNotes for 1.2:
>>
>>    "added pure-Python versions of C modules (leading to some basic hg
>> commands running on Jython)"
>>
>> I wonder it means now Mercurial can do away with C compiler during
>> installation. Appreciate if someone can share one this.
>
> Yes.

How do I install a mercurial without the C modules using setup.py? I
don't see changes in setup.py that's geared for pure-python
installation. There's a changeset about adding PURE into Makefile, but
it's not clear to me what options to pass to setup.py for this.

> But you'll get significantly reduced performance. It's mostly
> interesting for running Mercurial inside virtual machines or similar
> hacks.

It does simplify installation (via source) on Windows a bit. It's not
trivial to get the C compile environment setup in Windows.