Re: git-archive and tar options

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On Thu, Jul 14, 2011 at 07:16:24PM +0200, René Scharfe wrote:

> >> git archive --format=tar -o my.tar --transform 
> >> 's,^Web/Templates/,myPath/myWeb/Templates/,' HEAD WebPortal/Templates/
> >> error: unknown option `transform'
> > 
> > Yeah, that won't work, because there is no such option. We do have
> > "--prefix", but I suspect that's not flexible enough for what you want.
> 
> If you only need a single subdirectory with a custom prefix you could do
> something like this (variables only used to keep the lines short):
> 
> 	$ subdir=WebPortal/Templates
> 	$ prefix=myPath/myWeb/Templates/
> 	$ (cd "$subdir" && git archive --prefix="$prefix" HEAD) >my.tar
> 
> The output file can be specified with -o as well, of course, but you'd
> either need to use an absolute path or add "../" for each directory
> level you descend into (-o ../../my.tar in this case).

Couldn't you also do:

  git archive --prefix=$prefix HEAD:$subdir >my.tar

? I guess that loses the pax header with the commit sha1 in it, though,
because you are feeding a straight tree instead of a commit.

We didn't when git-archive was written, but these days we have
get_sha1_with_context to remember incidental things about an object we
look up. It should perhaps remember the commit (if any) we used to reach
a treeish, and then the above command line could still insert the pax
header.

-Peff
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