[darcs-users] non-atomic pull

[David Roundy]

On Sat, Oct 11, 2003 at 03:29:53PM +0300, Aggelos Economopoulos wrote:
> Is this a known problem?
> 
> aggelos at erwin:~/src/darcs/darcs> darcs pull
> Pulling from http://abridgegame.org/repos/darcs...
> 
> Fail: user error
> Reason: Failed to download URL http://abridgegame.org/repos/darcs/_darcs/
> patches/
> refuse_to_setpref_an_invalid_pref_field.-David_Roundy_2droundy9abridgegame.org7-Sat_Oct_11_07.38.49_EDT_2003 
> error code: 52
> 
> aggelos at erwin:~/src/darcs/darcs> darcs pull
> Pulling from http://abridgegame.org/repos/darcs...
> [refuse to setpref an invalid pref field.
> David Roundy <droundy at abridgegame.org>**Sat Oct 11 07:38:49 EDT 2003] 
> Shall I pull this patch? [ynvaswh] y
> So far so good... the merge succeeded.
> Finished pulling.
> aggelos at erwin:~/src/darcs/darcs>

I'm afraid I don't quite follow what you quote above.  It seems that you
ran pull once and got a network error of some sort, and then ran again, and
everything worked fine.  Where's the problem?

> It seems that apply appends the recorded patch names to _darcs/inventory 
> _before_ writing the patch files in _darcs/patches.

I presume that you mean pull, not apply here.  Pull does write the patches
prior to appending to the inventory files.

Are you using compression perhaps? When compression is used, the file write
is done asynchronously, so in theory you could have inventory updated prior
to the patch files being written.
-- 
David Roundy
http://www.abridgegame.org