Brian Harring <ferri...@gmail.com> added the comment:

@martin:

Yeah... that's probably the better approach, although seperation of processes 
(in terms of setup.py triggering conversion) has some benefits.

The reason I used process seperation and invocation of main was to protect my 
distutils extensions against having to know the innards of lib2to3- either it 
could invoke the normal 2to3 or invoke the caching version for the buildslaves. 
 Essentially I wanted the caching version to behave the same as normal 2to3 
invocations.

Not great I'll admit, but so it goes.  I'd still like to see the caching 
integrated in some form w/in stdlib since it has definite benefits- and folk 
are more likely to use something from stdlib than go raiding from a backwater 
pkg like snakeoil.  That said, we'll see what folks think ;)

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<http://bugs.python.org/issue7826>
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