The test did "reset --hard" (where the HEAD commit has an empty
blob at path "empty") followed by "> empty", expecting that
the index does not notice the file _changed_ since git wrote
it out upon "reset" if the redirection is done quickly enough.
There was no need to do the emptying, and it gave a wrong result
if "reset --hard" happened on time T and then ">empty" happened on
the next second T+1. This fixes it.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
When we see no context nor deleted line in the patch, we used to declare
that the patch creates a new file. But some people create an empty file
and then apply a patch to it. Similarly, a patch that delete everything
is not a deletion patch either.
This commit corrects these two issues. Together with the previous commit,
it allows a diff between an empty file and a line-ful file to be treated
as both creation patch and "add stuff to an existing empty file",
depending on the context. A new test t4126 demonstrates the fix.
Signed-off-by: Junio C Hamano <gitster@pobox.com>
