[MacPorts] #17473: RFE: allow Portfile to upgrade dependents

[MacPorts]

#17473: RFE: allow Portfile to upgrade dependents
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 Reporter:  mcalhoun@…             |       Owner:  macports-tickets@…                   
     Type:  enhancement            |      Status:  new                                  
 Priority:  Normal                 |   Milestone:  MacPorts base enhancements           
Component:  base                   |     Version:                                       
 Keywords:                         |        Port:                                       
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Comment(by mcalhoun@…):

 Replying to [comment:4 blb@…]:
 > Is macports.tcl.diff against an old version, it's 230 lines off against
 trunk?
 I did use an old version (the current release), but based on what I've
 looked at so far,[[BR]]
 nothing new in the trunk is a problem.

 > So the usage on this would be (using perl5), when it gets version set to
 5.10.0 (or whatever at the time it happens), then poison_version would
 also be set to that, correct?
 Correct.

 >And for future 5.10.x updates, it'd be left at the same 5.10.0 as
 originally set so slower upgraders coming from 5.8.x would still have the
 right thing happen?
 Yes.

 >Being left at 5.10.0 until a (hypothetical) 5.12.0 is released, then
 updating to 5.12.0.
 Yes.

 > Then it becomes like epoch, once added it can never be removed.
 If the port maintainer wants to accommodate those slow to upgrade, then
 yes, it would have to remain.[[BR]]
 Removing it, however, should pose no problem to new installations or
 upgrades at or beyond the poison_version.

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Ticket URL: <http://trac.macports.org/ticket/17473#comment:5>
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