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Added a comment: extra level of indirection

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http://adamspiers.myopenid.com/ 2011-12-19 12:45:19 +00:00 committed by admin
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[[!comment format=mdwn
username="http://adamspiers.myopenid.com/"
nickname="Adam"
subject="extra level of indirection"
date="2011-12-19T12:45:18Z"
content="""
Surely this could be handled with an extra layer of indirection?
git-annex would ensure that every directory containing annexed data contains a new symlink `.git-annex` which points to `$git_root/.git/annex`. Then every symlink to an annexed object uses a relative symlink via this: `.git_annex/objects/xx/yy/ZZZZZZZZZZ`. Even though this symlink is relative, moving it to a different directory would not break anything: if the move destination directory already contained other annexed data, it would also already contain `.git-annex` so git-annex wouldn't need to do anything. And if it didn't, git-annex would simply create a new `.git-annex` symlink there.
These `.git-annex` symlinks could either be added to `.gitignore`, or manually/automatically checked in to the current branch - I'm not sure which would be best. There's also the option of using multiple levels of indirection:
foo/bar/baz/.git-annex -> ../.git-annex
foo/bar/.git-annex -> ../.git-annex
foo/.git-annex -> ../.git-annex
.git-annex -> .git/annex
I'm not sure whether this would bring any advantages. It might bring a performance hit due to the kernel having to traverse more symlinks, but without benchmarking it's difficult to say how much. I'd expect it only to be an issue with a large number of deep directory trees.
"""]]