[SciPy-dev] SVN "corruption" / bzr-svn oddity?

Charles R Harris charlesr.harris@gmail....
Wed Apr 15 19:25:35 CDT 2009


On Wed, Apr 15, 2009 at 5:30 PM, <josef.pktd@gmail.com> wrote:

> On Wed, Apr 15, 2009 at 7:06 PM, Pauli Virtanen <pav@iki.fi> wrote:
> >
> > Hi all,
> >
> > Commit r5661 apparently reverted some previous commits: compare
> >
> >
> http://projects.scipy.org/scipy/browser/trunk/scipy/special/tests/test_basic.py?rev=5660
> >
> http://projects.scipy.org/scipy/browser/trunk/scipy/special/tests/test_basic.py?rev=5661
> >
> > looking at the line "cephes.pbdv(1,0),(0.0,0.0)", which previously read
> > "cephes.pbdv(1,0),(0.0,1.0)". The strange thing is that
> >
> >        http://projects.scipy.org/scipy/changeset/5661
> >
> > does not show that this change was made. It seems like bzr-svn did
> something
> > clever...
> >
> >
> > Moreover,
> >
> >        svn diff -r 5660:5661 test_basic.py
> >
> > says
> >
> >        svn: Unable to find repository location for 'test_basic.py' in
> revision 5660
> >
> > which is unexpected.
> >
> >
> > The Git repository indicates that something like this occurred:
> >
> >       5655 5656 5657 5658 5659 5660
> >        o----o----o----o----o----o----o 5661
> >         \___________________________/
> >
> > So, the revision 5661 is based on 5655. Now, bzr-svn has done something
> > and silently reverted the changesets 5656-5660 so that the reversion
> > does not appear in the commit 5661. (Surprisingly, git-svn *recognized*
> this
> > as a merge!) The full diff appears to be
> >
> >        $ git diff --stat 746e23..svn/trunk
> >        INSTALL.txt                                       |  222
> ++++++++++++++-------
> >        scipy/io/matlab/tests/data/test_skip_variable.mat |  Bin 20225 ->
> 0 bytes
> >        scipy/io/matlab/tests/test_mio.py                 |   31 +---
> >        scipy/special/specfun_wrappers.c                  |    6 +-
> >        scipy/special/tests/test_basic.py                 |   31 +---
> >        scipy/stats/distributions.py                      |    2 +-
> >
> > So, it seems that bzr-svn does some "deep" SVN-fu on merges. Looking at
> > the commit message for r5661 more closely, it says ". (copied from
> trunk)",
> > and indeed "svn log ." indicates that r5661 is based on r5660.
> >
> > Does someone understand SVN enough to know what happened and how
> > to revert it, if needed?
> >
> > My guess would be
> >
> >        svn cp http://svn.scipy.org/svn/scipy/trunk@5660
> http://svn.scipy.org/svn/scipy/trunk
> >
> >    ***
> >
> > Wed, 15 Apr 2009 23:31:39 +0200, Xavier Gnata wrote:
> > [clip]
> >> Well I'm do not understand this point Looking at
> >> http://svn.scipy.org/svn/scipy/trunk/scipy/special/tests/test_basic.pyI
> >> can read :
> >>
> >> def test_pbdv(self):
> >>         assert_equal(cephes.pbdv(1,0),(0.0,0.0)
> >>
> >> This website claims I'm looking at
> >>
> >>
> >>     Revision 5661: /trunk/scipy/special/tests
> >>
> >> I'm must be missing something...sorry for the noise....
> >
> > Good catch, you're completely right! Something strange is going on.
> > I only checked it via looking at the commits in
> >
> >        http://projects.scipy.org/scipy/timeline
> >
> > and as you can see, none of the commits after 5657 actually reverts the
> > change, so I assumed it was still there...
> >
> > --
> > Pauli Virtanen
> >
> > _______________________________________________
> > Scipy-dev mailing list
> > Scipy-dev@scipy.org
> > http://mail.scipy.org/mailman/listinfo/scipy-dev
> >
>
>
> I think that's my fault, but I haven't figured out how to revert this.
>
> I tried to use bzr-svn but something looked strange, but I thought it
> is only the large commit message.
>
> Can you undo whatever happened in
> http://projects.scipy.org/scipy/changeset/5661, and I won't try this
> anymore if it messes up the repository and not just the commit
> message.
>

I found reverting the central svn repository to be a total PITA. If someone
still has the correct versions of the files the easiest thing to do is just
commit them.

Chuck
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