[Python-Dev] Mercurial migration: help needed

Martin Geisler mg at lazybytes.net
Sat Aug 22 01:17:53 CEST 2009

Dj Gilcrease <digitalxero at gmail.com> writes:

> On Fri, Aug 21, 2009 at 8:19 AM, Dirkjan Ochtman<dirkjan at ochtman.nl> wrote:
>> Enabling extensions in a versioned file is not going to fly.
> any specific reason?

In the general case, you can specify an extension to be enabled by

  foo = ~/src/foo

So if I can enable an extension like that on your system, I might be
evil and commit a bad extension *and* enable it at the same time.

You might argue that one should then limit which extensions one can
enable in a versioned file, but it seems hard to come up with a good
mechanism for this. The current "mechanism" is the users own ~/.hgrc
file which can be seen as a whitelist of extensions he trust.

An alternative could be the new %include syntax for configuration files,
which was introduced in Mercurial 1.3. If you add

  %include ../config

to your .hg/hgrc file, the (versioned!) file named 'config' from the
root of your repository will be included on the spot. The catch is that
you have to add such a line to all your Python clones.

Martin Geisler

VIFF (Virtual Ideal Functionality Framework) brings easy and efficient
SMPC (Secure Multiparty Computation) to Python. See: http://viff.dk/.
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