Feature request: warn on stale binaries

[Robert Collins]

On Fri, 2008-04-11 at 14:15 -0400, Aaron Bentley wrote:
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> Hi all,
> 
> It would be nice if Bazaar could detect that it was loading a stale
> binary module.  People like me who run Bazaar from the source tree can
> easily wind up with stale binaries, and get poor behavior.
> 
> For example: https://bugs.launchpad.net/bugs/215797
> 
> I'm not sure how to do this, so I thought I'd just throw it out there.
> 
> It seems as though we could bake the bzrlib version into the binary,
> though that would force needless recompiles.  We could include a SHA1 of
> the source file, but I'm not sure how we could efficiently detect a
> change at runtime.
> 
> I suppose the length of the source file would be a good-enough proxy for
> a checksum, and that would be cheap to check.

What about the same way .pyc staleness is detected? during import look
for the .pyx and if it is newer, raise an ImportError.

-Rob

-- 
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