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Re: Status of meta-data-versioning (mod time)?

From: Branko ─îibej <brane_at_xbc.nu>
Date: 2005-07-12 13:49:02 CEST

Dirk Schenkewitz wrote:

> - 'make' uses them. If the right order is preserved, this could also
> be solved using --use-commit-times, but right now I believe that
> the right order is not preserved.

I've heard this argument many times, and it's simply *wrong*. Imagine
this scenario:

    * update to HEAD
    * make clean all
    * update to some older revision
    * make all

If you preserve commit times in the WC, then after the update to an
older revision, some files that need rebuilding will have changed, but
make won't notice because their timestamps would be older than the
timestamps of the generated files left over from the previous build.
Such an update would force you ro do a clean rebuild, and that's not nice.

The argument assumes that generated files are under version control,
too, but that's usually not the case.

-- Brane

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Received on Tue Jul 12 13:51:13 2005

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