On Fri, 26 Oct 2007, Junio C Hamano wrote:
>
> So for a broken pair, the actual value of rename_used does not really
> matter. We only care about it not going down to zero.
Correct. The rename_used count really is immaterial *except* for the magic
distinction between zero ("it's a rename, no original source file left")
and non-zero ("it's a copy, original source file remains").
Which is why the new counter is so fundamentally simple: by decrementing
it for each rename we encounter, we automatically get that behaviour of
"only the last user turns into a 'rename' if the source file really went
away" that we want.
The old code did it all with some really expensive loops over the
remaining renames.
Linus
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