Re: [jgit-dev] Understanding Racy Git Handling in JGit: detection of coa

["Shawn O. Pearce" <spearce@xxxxxxxxxxx>]

Ferry Huberts <ferry.huberts@xxxxxxxxxx> wrote:
> 
> > In msysgit they only store the seconds portion of the timestamp
> > they get back from Windows.  The sub-seconds portion (if it exists
> > at all) is flat out discarded.  So the time_ns field in the index
> > record is always 0.
> 
> just for my curiosity...
> is there a good reason _not_ to patch msysgit to fix this?
> would dso accept such a patch?

I have no idea.  We could try.  The rounding-to-seconds code dates
back to the original commit that introduced it, but doesn't explain
why they do the rounding:

  commit 5411bdc4e4b170a57a61b2d486ab344896c41500
  Author: Marius Storm-Olsen <mstormo_git@xxxxxxxxxxxxxxx>
  Date:   Mon Sep 3 20:40:26 2007 +0200

    Windows: Add a new lstat and fstat implementation based on Win32 API.
    
    This gives us a significant speedup when adding, committing and stat'ing fil
    Also, since Windows doesn't really handle symlinks, we let stat just uses ls
    We also need to replace fstat, since our implementation and the standard sta
    functions report slightly different timestamps, possibly due to timezones.
    
    We simply report UTC in our implementation, and do our FILETIME to time_t
    conversion based on the document at http://support.microsoft.com/kb/167296.
    
-- 
Shawn.