[Nuxeo-tickets] [Nuxeo Repository] #1883: Upgrade steps presentation and checking

[Nuxeo Repository]

#1883: Upgrade steps presentation and checking
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 Reporter:  gracinet     |       Owner:  madarche 
     Type:  enhancement  |      Status:  new      
 Priority:  P2           |   Milestone:  CPS 3.4.6
Component:  CPSCore      |     Version:  TRUNK    
 Severity:  normal       |    Keywords:           
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 Currently, proposed upgrade steps depend on upgraded version numbers (for
 the given category, stored on the portal) and checkers (declared functions
 in the zcml, along the handler).

 The rules deduced from that info are obscure, and in particular, the step
 shouldn't be proposed if the checker returns "false". Could also be
 convenient to depend on the source version number (to avoid cumbersome
 code in checkers).

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Ticket URL: <https://svn.nuxeo.org/trac/pub/ticket/1883>
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