Detach many subdirectories into a new, separate Git repository

Posted by prisonerjohn on Stack Overflow See other posts from Stack Overflow or by prisonerjohn
Published on 2010-06-05T20:51:53Z Indexed on 2010/06/05 21:02 UTC
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This question is based on http://stackoverflow.com/questions/359424/detach-subdirectory-into-separate-git-repository

Instead of detaching a single subdirectory, I want to detach a couple. For example, my current directory tree looks like this:

/apps
  /AAA
  /BBB
  /CCC
/libs
  /XXX
  /YYY
  /ZZZ

And I would like this instead:

/apps
  /AAA
/libs
  /XXX

The --subdirectory-filter argument to git filter-branch won't work because it gets rid of everything except for the given directory the first time it's run. I thought using the --index-filter argument for all unwanted files would work (albeit tedious), but if I try running it more than once, I get the following message:

Cannot create a new backup.
A previous backup already exists in refs/original/
Force overwriting the backup with -f

Any ideas? TIA

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