[MacPorts] #50770: In rsync_options, use --delete-delay instead of --delete-after

[MacPorts]

#50770: In rsync_options, use --delete-delay instead of --delete-after
--------------------------+--------------------------------
  Reporter:  ryandesign   |      Owner:  macports-tickets@…
      Type:  enhancement  |     Status:  new
  Priority:  Normal       |  Milestone:
 Component:  base         |    Version:  2.3.4
Resolution:               |   Keywords:
      Port:               |
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Comment (by jmroot):

 Apple's rsync doesn't appear to support this option even on Ventura.
 {{{
 % /usr/bin/rsync -av --delete-delay rtest1/ rtest2
 rsync: --delete-delay: unknown option
 rsync error: syntax or usage error (code 1) at
 /AppleInternal/Library/BuildRoots/d9889869-120b-
 11ee-b796-7a03568b17ac/Library/Caches/com.apple.xbs/Sources/rsync/rsync/main.c(1337)
 [client=2.6.9]
 }}}

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Ticket URL: <https://trac.macports.org/ticket/50770#comment:1>
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