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From Daniel Shahaf <danie...@apache.org>
Subject Re: Modifying transaction properties (svnadmin setrevprop)
Date Mon, 25 Apr 2016 08:19:16 GMT
Ryan J Ollos wrote on Sat, Apr 23, 2016 at 17:43:44 -0700:
> On Sat, Apr 23, 2016 at 3:19 PM, Daniel Shahaf <danielsh@apache.org> wrote:
> 
> > Daniel Shahaf wrote on Sat, Apr 23, 2016 at 21:48:38 +0000:
> > > Ryan J Ollos wrote on Sat, Apr 23, 2016 at 14:23:37 -0700:
> > > > For a long time I've known the rule "don't modify a transaction in a
> > > > pre-commit hook", documented in (1) and recently repeated in (2).
> > > >
> > > > I was therefore surprised to read about the "svnadmin setrevprop"
> > command
> > > > (3) in 1.9, and to see an example of modifying transaction properties
> > in
> > > > the hook-scripts: "persist-ephemeral-txnprops.py" (4).
> > > >
> > > > Are there some conditions under which it's okay to modify the
> > transaction,
> > > > or are there only specific use-cases when this should be done?
> >
> > I think I can give a simpler answer: anything you can do using only
> > svnadmin/svnlook is okay.  The rule you quote refers to people who
> > directly use the svn_fs_* APIs, or DAV clients.
> >
> > Cheers,
> >
> > Daniel
> >
> 
> Thanks, that makes sense. In the past, I have applied the rule in an
> overly-restrictive way when considering pre-/post-commit hook use cases.

Then perhaps the book's warning box [1] should be clarified with the
information in this thread [2].  CCing svnbook-dev@.

Cheers,

Daniel
(Ryan: svnbook is maintained outside ASF by the same people that make up
the svn PMC)

[1] http://svnbook.red-bean.com/nightly/en/svn.reposadmin.create.html#svn.reposadmin.hooks.summary
[2] http://svn.haxx.se/users/archive-2016-04/index.shtml#57

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