Re: Does GIT has vc keywords like CVS/Subversion?

From: Johannes Schindelin <johannes.schindelin@gmx.de>
Date: Oct 9, 2006, 22:48 UTC
Message-ID: <Pine.LNX.4.63.0610100045430.14200@wbgn013.biozentrum.uni-wuerzburg.de>
In-Reply-To: <46a038f90610091408y29f60a12gea7040b5412331c6@mail.gmail.com>

Hi,

On Tue, 10 Oct 2006, Martin Langhoff wrote:

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> On 10/10/06, Linus Torvalds <torvalds@osdl.org> wrote:
>
> >  - outside of the SCM, keyword substitution can make sense, but doing it
> >    should be in helper scripts or something that can easily tailor it for
> >    the actual need of that particular project.

... like a pre-commit hook.

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> If we have a tool that I can pass a file or a directory tree and will 
> find the (perfectly|closely) matching trees and related commits.
> 
> For the single file case, searching for an exact SHA1 match is easy,
> as is by path.

If you have the path, you can reuse the whole algorithm for finding the best delta base.

However, if you do not have the path, you might as well just give up (if there is no perfect match for the SHA1), since the SHA1 is _not_ similar for similar contents. IOW, you'd literally have to search _all_ objects in the repository, which usually takes a long, long time.

Ciao, Dscho