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Re: Issue 4579 / svnmucc fails to process certain deletes

From: Evgeny Kotkov <evgeny.kotkov_at_visualsvn.com>
Date: Mon, 11 May 2015 21:41:55 +0300

(Moving the http://subversion.tigris.org/issues/show_bug.cgi?id=4579
 discussion to <dev_at_subversion.apache.org>)

Bert Huijben <rhuijben_at_tigris.org> writes:

> The documentation you quote doesn't allow these scenarios.

From my reading of ^/branches/1.8.x/subversion/svnmucc/svnmucc.c:460-475 [1],
svnmucc allowed these scenarios when constructing the operation chain in
build() — prior to calling execute(). I doubt this is accidental, because the
decision is stated in the comment that exists since r863437 [2].

The mentioned build() function was folding some of the action sequences such
as propset + rm into a single rm action, and that's why the test cases from
r1678755 [3] work with Subversion 1.8.x.

> You try to put a file and then immediately delete it in the same transaction.
> (Which is something that isn't allowed in an editor drive)
> Or delete something that is already deleted.
> (Which appears to be an error?)
> Or setting a property and then deleting the entire node.
> I don't see why these examples would ever be valid in this order.
> I would call the fact that all of these worked in 1.8.x a bug, as non of
> these scenarios are allowed by the ra or repos apis.
> (Perhaps they are allowed at the fs layer... but that is not where this tool
> works)

I raised an issue because I think that we care about compatibility and about
*not* breaking user scripts and tools that happen to use 'svnmucc'. Other
possible examples that work in 1.8.13, but fail in 1.9.0 RC1 include:

  svnmucc rm /A/mu rm /A

  svnmucc cp HEAD /iota /A/iota rm /A

If this behavior change isn't a regression, I am fine with closing the issue.

[1] https://svn.apache.org/repos/asf/subversion/branches/1.8.x/subversion/svnmucc/svnmucc.c
[2] https://svn.apache.org/r863437
[3] https://svn.apache.org/r1678755

Evgeny Kotkov
Received on 2015-05-11 20:42:26 CEST

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