+1 (I didn't read this in detail but I trust you, as you are the author of 
http://plone.org/documentation/kb/version-numbers-in-cmfquickinstaller/) :-)

On 2010-06-01, Maurits van Rees <m.van.r...@zestsoftware.nl> wrote:
> Hi,
> The default metadata.xml that ZopeSkel has in various templates looks 
> like this:
><?xml version="1.0"?>
> If nobody objects, I intend to change the version from 1 to 1000. The 
> reason is that GenericSetup can get confused when comparing version 
> numbers for possible upgrade steps. It compares them alphabetically, so 
> for example it does not realize that 10 is higher than 9. I ran into 
> problems with this a while ago; I do not remember what exactly goes 
> wrong, but I think GS thinks like this: "The currently installed profile 
> is 9, we have an upgrade step from 9 to 10; who cares: 9 is higher than 
> 10 so I am not going to run that step or even list it unless the user 
> asks me for all steps." Or it may think: "Hey, we are currently at 
> profile version 13, let's show the upgrade steps from 1 to 2, 2 to 3, 
> etc." Not very helpful. :-)
> Having 1000 as number solves that problem and it is what I have been 
> doing in packages I make. If the package I work on gets backwards 
> incompatible changes that warrant creating a maintenance branch, I would 
> create branches/1.0, keep the metadata.xml number the same (so 1000 if 
> there have been no profile changes yet). On trunk I would update the 
> version.txt/setup.py number from 1.0 to 1.1 or 2.0 and increase the 
> metadata.xml version from 1000 to 1100 or 2000 (and create an upgrade 
> step for that, possibly a dummy one if nothing needs to happen).  This 
> creates a gap in the profile version numbers so there is room in the 1.0 
> branch to add some more upgrade steps if needed.
> Also, quite quickly after the previous 2.16 release on March 23, some 
> changes were made, most notably a bug fix for the problem with the 
> missing locales directory. After that, nothing has happened for over two 
> months, so I'd say we can cut a new release.

Alex Clark · http://aclark.net
Author — Plone 3.3 Site Administration · http://aclark.net/admin

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