[MacPorts] #30739: selfupdate should sync last not first

[MacPorts]

#30739: selfupdate should sync last not first
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 Reporter:  ryandesign@…             |       Owner:  macports-tickets@…                   
     Type:  defect                   |      Status:  new                                  
 Priority:  Normal                   |   Milestone:                                       
Component:  base                     |     Version:  2.0.1                                
 Keywords:                           |        Port:                                       
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Comment(by jmr@…):

 Seems like it would be easier to just not generate the portindex locally
 if base is outdated.

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Ticket URL: <https://trac.macports.org/ticket/30739#comment:2>
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