[MacPorts] #60786: Build progress bar does not account for muniversal variant

[MacPorts]

#60786: Build progress bar does not account for muniversal variant
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 Reporter:  ryandesign  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  base        |    Version:  2.6.99
 Keywords:              |       Port:
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 The muniversal variant causes multiple configure/build/destroot phases to
 occur, one per arch. If a port uses both the muniversal portgroup and the
 cmake portgroup, for which base now has progress bar support, then the
 progress bar is inaccurate: it goes from 0 to 100% for the first arch, and
 then goes from 0 to 100% again for the next arch. This will confuse the
 user since there is deliberately no other indication to the user that a
 port uses the muniversal portgroup since it is an implementation detail
 that the user is not supposed to need to know about.

 As I said in comment:ticket:15939:20:

 > We also need to consider that some builds may have multiple parts. For
 example, a port that uses cmake and the muniversal portgroup will go from
 0% to 100% progress more than once (once for each arch).

 Maybe there can be a way for portgroups and advanced ports to control the
 endpoints of the progress bar. The defaults would be that the progress bar
 goes from 0 to 100 but the muniversal portgroup could manipulate the
 endpoints so that for example the first arch of a two-arch build sets the
 endpoints to 0 and 50 and the second arch sets them to 50 and 100.

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Ticket URL: <https://trac.macports.org/ticket/60786>
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