Re: Filter-branch's "move tree to subdirectory" example fails with BSD sed?

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On Mon, Apr 16, 2012 at 10:03:03AM -0700, Junio C Hamano wrote:

> >   git filter-branch --index-filter '
> >     git ls-files -sz |
> >     perl -0pe "s{\t}{\tnewsubdir/}" |
> >     git update-index --from-scratch -z --index-info
> >   ' HEAD
> 
> Wouldn't "git read-tree --prefix=newsubdir/" suffice without the pipeline?
> I.e.
> 
>         git filter-branch --index-filter '
> 		rm -f "$GIT_INDEX_FILE"
>                 git read-tree --prefix=newsubdir/ "$GIT_COMMIT"
> 	' HEAD

Yeah, I think it does (at least it makes sense to me, and worked on a
simple test case). I think I might use "git read-tree --empty" instead
of "rm", as it is a little more obvious what is going on. But other than
that, it is much more readable.

It is a slight shame not to show an "ls-files | update-index" example,
because that is the most general form. But since this form is quite
often cut-and-paste by people, I think simple is better here. If we want
to show a more complex example, then we should add it separately.

-Peff
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