[Python-Dev] asdl.py and Python-ast.[hc]

Eli Bendersky eliben at gmail.com
Fri Sep 27 17:26:33 CEST 2013

On Fri, Sep 27, 2013 at 7:26 AM, "Martin v. Löwis" <martin at v.loewis.de>wrote:

> Am 26.09.13 15:52, schrieb Eli Bendersky:
> > * Should I always check-in Python-ast.h and Python-ast.c when I touch
> > asdl* ? The generated files are unchanged, it's only the timestamp that
> > changed.
> If they really didn't change, I don't think it matters much. I believe
> there is a fundamental problem in Mercurial which fails to get it
> "right" - with the defense that one shouldn't check in generated files
> in the first place.
> "hg touch" is supposed to work around this limitation. So when you only
> check in the generator, anybody updating should do "make touch" after
> the update, which should touch the generated files even though they
> didn't change.
> > * Can we, in theory, use new Pythons for asdl* code, because
> > Python-ast.* are, in fact, checked in so they don't have to be rebuilt
> > by the bots or users?
> I'd say yes. That's the point of checking in generated files, so that
> users don't need to run the generator.

Thank you for the explanation, Martin.

> > While we're at it, it seems that .hgtouch is wrong:
> >
> > Include/ast.h: Parser/Python.asdl Parser/asdl.py Parser/asdl_c.py
> > Python/Python-ast.c: Include/ast.h
> >
> > The file Include/ast.h is not,
> It may well be incorrect - feel free to fix it.

Thanks. There are a couple of things to address before we can try to
actually run 'make touch' on all bots. I opened
http://bugs.python.org/issue19106 to track this.

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