I disagree that the revision is required.  I know that the RM is going to 
recreate the tag with each release candidate.  Therefore, so long as I refetch 
that tag for every release vote I can be confident that I am reviewing the 
release contents.

Ralph

On Jun 25, 2013, at 9:52 AM, sebb wrote:

> The mission of the ASF is to release software as source, and to ensure
> that the released source is available under the Apache Licence.
> 
> Before a release can be approved it must be voted on by the PMC.
> The review process needs to establish that the proposed source release
> meets those aims.
> 
> It's all but impossible for reviewers to examine every single file in
> a source archive to determine if it meets the criteria.
> And it's not unknown for spurious files to creep into a release
> (perhaps from a stale workspace - are releases always built from a
> fresh checkout of the tag?)
> 
> However, PMCs are also required to check what is added to the SCM
> (SVN/Git) to make sure it meets the required license criteria.
> This is done on an ongoing basis as part of reviewing check-ins and
> accepting new contributions.
> So provided that all the files in the source release are also present
> in SCM, the PMC can be reasonably sure that the source release meets
> the ASF criteria.
> 
> Without having the SCM as a database of validated files, there are far
> too many files in the average source archive to check individually.
> And how would one check their provenance? The obvious way is to
> compare them with the entries in SCM.
> 
> Therefore, I contend that a release vote does not make sense without
> the SCM tag.
> In the case of SVN, since tags are not immutable, the vote e-mail also
> needs the revision.
> 
> Whether every reviewer actually checks the source archive against SCM
> is another matter.
> But if the required SCM information is not present, it would be
> difficult to argue that the RM had provided sufficient information for
> a valid review to take place.
> 
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