Hello Fabien,

Your clear explanation states that you are not releasing the migration scripts 
because it causes "frustrations". I assure you it will not create more 
frustration than what existing openerp modules could create or have already 
done.

If you had made the statement after publishing your sources, that openerp sa 
offers the service of migration, it would be perfectly normal. But, in this 
case you are hiding the source code for migrations and then claim that you dont 
release because its not easy to use.

If Tryton can manage and pack migrations with the module for all maintained 
versions (not just previous), why not Open ERP pack migration scripts with the 
same modules as the code is developed? Technically, we could explain this as 
antifeature, which is against the free (as in freedom) software principles too. 
As a business, it would be in the interest of openerp to make changes in the 
code from version to version, as it fetches more revenue for Open ERP SA 
through sale of migration scripts.

In simple terms, this is exploitation that adds hidden costs to openerp and 
introduces vendor lock-in to openerp sa. 

To summarise:

1. Open ERP hides migration scripts and complexity is no excuse for code hiding.
2. Selling of migration scripts motivates Openerp SA (a for profit business) to 
make changes to boost sales
3. Migrations being part of the modules themselves, the hiding away of source 
code and selling them at price, is 'antifeature' and against GPL.
4. Migration scripts are hidden costs to an openerp adopter and a form of 
vendor lock-in 

Note: Above are not my self declared opinions. You could refer to extensive 
literature available on the same. I could lead you to some if you need. 

Thanks to the work of spars (kndati) that something usable existed for 
migration from 4 to 5. Never checked TerminatOOR for migrations, but we will be 
definitely looking forward to using it. Thanks Raphael & co for this great work!

One last question: Are migration 'scripts' GPL?

Thanks

------------------------
Sharoon Thomas
Business Analyst & ERP Consultant
CEO at openlabs.co.in




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