Re: [PATCH] Add --no-rename to git-apply

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torsdag 27 september 2007 skrev Junio C Hamano:
> Robin Rosenberg <robin.rosenberg@xxxxxxxxxx> writes:
> 
> > With this option git-apply can apply a patch with a rename
> > onto the original file(s).
> 
> This is troubling from both design and implementation point of
> view.
> 
>  * Why would this be useful?  What's the point of producing the
>    renaming patch if you know you would want to apply while
>    ignoring the rename?
The point of producing the rename info is to find out which renames
are in it. It's only that I don't want to perform them straight away.

>  * The change looks too special purpose to me.  If you are
>    giving the ability to deposit the result to somewhere other
>    than where the patch intendes to, why limit it only to the
>    preimage name?  Aren't there cases where A is renamed to B
>    sometime in the history, and you have a patch that talks
>    about the content change A->A but the tree you have has the
>    contents already in B, and you would want to apply that
>    patch?  It feels that this and your "ignore rename" could be
>    handled much more cleanly and flexibly by preprocessing the
>    patchfile.
Well it is special *purpose*, but not tied to a particuar tool. I'm
not sure whether it is necessary with other tools though. I'll
consider the preprocessing and will retry the rename-back that
Johannes suggested.

> 
>  * By disabling the parsing of rename header lines, you are
>    disabling the sanity checking of the input done in
>    gitdiff_verify_name() called from gitdiff_oldname() and
>    gitdiff_newname().  I think it is wrong for --no-rename
>    option to affect the parsing of the input.  If we were to do
>    this, perhaps write_out_results() or one of its callee would
>    be a better place to do so.

Hopefully git produces sane things so the checking shouldn't be that
important, but I also do a check before beginning with checkouts and
so on, much like git-cvsexportcommit. The check  is performed without
the switch.

-- robin
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