[MacPorts] #69847: R-assertr @3.0.1: Unable to verify file checksums

[MacPorts]

#69847: R-assertr @3.0.1: Unable to verify file checksums
-------------------------+--------------------
  Reporter:  ryandesign  |      Owner:  (none)
      Type:  defect      |     Status:  new
  Priority:  Normal      |  Milestone:
 Component:  ports       |    Version:  2.9.3
Resolution:              |   Keywords:
      Port:  R-assertr   |
-------------------------+--------------------

Comment (by ryandesign):

 The difference between the old and new tarballs is only in the enclosing
 directory name. It was `ropensci-assertr-9d5cea4` and is now
 `tonyfischetti-assertr-9d5cea4`. The simplest solution is to avoid this
 for this version by setting `master_sites macports_distfiles` and removing
 it with the next version update. This happened because the GitHub project
 moved from the owner `ropensci` to `tonyfischetti` and the R-assertr port
 is downloading using GitHub's legacy "tarball" method for downloading
 automatically-generated tarballs. If it had used the newer "archive"
 method this problem would not have occurred. The way to use this new
 download method is to set `github.tarball_from archive`, if using the
 github portgroup. The R-assertr port isn't using the github portgroup
 directly but is using the R portgroup which uses the github portgroup so
 I'm not sure if setting `github.tarball_from archive` will work, but it
 might. This would, of course, change the checksums again, so it's best to
 combine this change with a version update.

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Ticket URL: <https://trac.macports.org/ticket/69847#comment:1>
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