-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Fred Drake wrote:
On Fri, Apr 23, 2010 at 3:08 PM, Tres Seaver <tseaver@palladion.com> wrote:
Done. The 3.6.3 release is up on PyPI:
I guess I should get out more; just noticed this thread.
Changing the stored permission names is a big deal. If a permission gets stored with zope.dublincore 3.6.3, then an instance running 3.6.(0|1) can't use it. This creates a problem for rolling restarts, where a permission stored by an instance with 3.6.3 may be accessed by an instance using 3.6.1 (or an even older version).
Here's another possible approach:
- Keep the zope.app.dublincore.* permissions in 3.6.x, with forward-compatibility adjustments in the ZCML, using
<meta:redefinePermission from="zope.dublincore.change" to="zope.app.dublincode.change" />
- Change the permission names and add backward compatible ZCML in 3.7.x:
<meta:redefinePermission from="zope.app.dublincode.change" to="zope.dublincore.change" />
and the trunk is updated to indicate a forthcoming 3.7.0 release minus the BBB shims:
If this even needs to be done, I'd like to see it be 4.0.0, because it's incompatible.
This just doesn't seem valuable to me.
I disagree, pretty strongly: making code forever responsible for bad old data is responsible for a lot of horrors in both Zope2 and Zope3 code bases. Releasing the packages separately allows the folks who need time to fix the data to have it, while still allowing development to continue without the burden. If you are running with a 3.6.x version of zope.dublincore, and you have persisted the permissions somehow, then you need to *evolve the data* before upgrading to 3.7.0. That is why 3.7.0 got the bump from 3.6.x. If you can't afford (yet) to evolve the data, then don't upgrade the package until you can. Running with 3.6.3 allows you to use either permission, as the zope.app.dublincore versions get upgraded in place to zope.dublincore equivalents. Or are you saying that the way 3.6.3 uses meta:redefinePermission won't work for persisted permissions? Tres. - -- =================================================================== Tres Seaver +1 540-429-0999 tseaver@palladion.com Palladion Software "Excellence by Design" http://palladion.com -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkvSF+oACgkQ+gerLs4ltQ7vVwCeMHD4uK8I60XpQ/ztWM9NJe/j tPEAn0g2jp23wm+WM9aPlRBlaHeQXNgv =i/iU -----END PGP SIGNATURE-----