Renamed unlocked files are now detected, and will always be
annexed, unless annex.largefiles disallows it.
This allows for git add's behavior to later be changed to otherwise
not annex files (whether by default or as a config option), without
worrying about the rename case.
This is not a major behavior change; annexing is still the default. But
there is one case where the behavior is changed, I think for the better:
touch f
git -c annex.largefiles=nothing add f
git add bigfile
git commit -m ...
mv bigfile f
git add f
Before, git-annex would see that f was previously not annexed,
and so the renamed bigfile content gets added to git. Now, it notices
that the inode is the one that bigfile used, and so it annexes it.
This potentially slows down git add a lot in some repositories because
of the poor performance of isInodeKnown when there are a lot of unlocked
files. Configuring annex.largefiles avoids the speed hit.
git-annex allows managing files with git, without checking the file
contents into git. While that may seem paradoxical, it is useful when
dealing with files larger than git can currently easily handle, whether due
to limitations in memory, checksumming time, or disk space.
For documentation, see doc/ or <https://git-annex.branchable.com/>
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