"Marco Costalba" <mcostalba@xxxxxxxxx> writes:
> Sorry, perhaps it is a silly question, but why git index should be
> different after just touching a file?
It uses the information from lstat(2) that is stored in the
index and taken from the filesystem -- if they are different
(touch changes it as you know, but so does "vi that-file") they
are reported as "modified".
git checkout -- Makefile
git diff-files Makefile
touch Makefile
git diff-files Makefile
The 'refresh' operation is to update the lstat(2) information in
the index for paths whose contents actually match what is in the
index (and it does not do anything else -- most notably paths
whose contents are different between the working tree and the
index are left as-is).
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