[MacPorts] #50896: Implement a function to create stable tarballs

[MacPorts]

#50896: Implement a function to create stable tarballs
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 Reporter:  mojca@…      |      Owner:  macports-tickets@…
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.3.4
 Keywords:               |       Port:
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 Many components in the core need a function that is able to create a
 stable tarball:
   * creating tarballs from SVN checkouts, potentially from git
 repositories with submodules etc.
   * creating reproducible tarballs with binary builds

 Options:
   * folder whose contents have to be compressed
   * compression method / extension
   * name of the prefix (usually that would be `${distname}`)
   * (optional?) timestamp of the resulting tarball
   * (optional?) whether or not to change timestamps of all files (svn
 checkout might already have suitable timestamps when `use-commit-
 times=yes` is set)

-- 
Ticket URL: <https://trac.macports.org/ticket/50896>
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