[MacPorts] #51689: preserve_runtime_libraries convenience PortGroup

[MacPorts]

#51689: preserve_runtime_libraries convenience PortGroup
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  Reporter:  rjvbertin@…  |      Owner:  macports-tickets@…
      Type:  submission   |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  contrib      |    Version:
Resolution:               |   Keywords:
      Port:               |
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Comment (by rjvbertin@…):

 As I said, this is mostly for reference for if anyone else has been
 looking at this problem.

 > This won't work with binaries built by our buildbot system, because no
 ports are active

 I presume you mean that no previous version of the port being built is
 present?

 That's OK, because this feature is handled via a variant as you must have
 seen. I'm not sure to what extent the reproducible build argument is a
 blocker in this particular case as files (themselves subjected to the
 principle) are added to a build that is otherwise unchanged.

 There's an alternative approach in which you cache the files to be
 preserved, and then restore them in the post-activate. That should resolve
 the reproducible build thing, but leave you with a potentially growing
 number of files that don't belong to any port.

 If useful we can continue discussing this on the ML, of course.

 > It also seems like you're looking in part for a solution to a problem
 you caused for yourself.

 And for anyone running non-default variants (esp. +universal!) or a non-
 default prefix ... or who runs a self-upgrade before the buildbots have
 had a chance to build all rev-bumped ports. If I'm not mistaken you end up
 building those ports locally because the Portfile will have the revbump
 already, right?

 I know I've created this for myself by having a lot of personal ports but
 I already stopped doing frequent self-upgrades because I have (or had) too
 many +universal ports and got tired of blocking my machine for long
 periods of time just because someone had pushed supposedly crucial update
 to a dependency of too many ports for which I couldn't get a prebuilt
 binary.

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Ticket URL: <https://trac.macports.org/ticket/51689#comment:2>
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