[darcs-devel] Fwd: Re: optimize --relink WILL CORRUPT YOUR REPOSITORY

[Mark Stosberg]

FYI.

----- Forwarded message from Juliusz Chroboczek <jch at pps.jussieu.fr> -----

To: Mark Stosberg <mark at summersault.com>
Subject: Re: optimize --relink WILL CORRUPT YOUR REPOSITORY
From: Juliusz Chroboczek <jch at pps.jussieu.fr>
Date: Tue, 01 Feb 2005 07:50:34 +0100
User-Agent: Gnus/5.1007 (Gnus v5.10.7) Emacs/21.3 (gnu/linux)

> By chance, would you have a test case we can add to the test suite to
> check for this in the future?

Sure.  Try something like (untested):

  $ mkdir a1
  $ cd a1
  $ darcs initialize
  $ echo '2' > a
  $ darcs add a
  $ darcs record -m 'Initial import.'
  $ cd ..
  $ darcs get a1 a2
  $ cd a1
  $ (echo '1'; echo '2') > a
  $ darcs record -m 'A1'
  $ cd ../a2
  $ (echo '2'; echo '3') > a
  $ darcs record -m 'A2'
  $ darcs optimize --uncompress
  $ cd ../a1
  $ darcs pull --all ../a2
  $ darcs optimize --uncompress
  $ darcs optimize --relink --sibling ../a2

The trick is that the patch a2 is present in both repos, is not
identical (it's been commuted w.r.t. a1), and the two patch files have
the same size.

                                        Juliusz

----- End forwarded message -----
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