[MacPorts] #61310: notmuch @0.31 +emacs: variable rsti_dir is empty

[MacPorts]

#61310: notmuch @0.31 +emacs: variable rsti_dir is empty
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  Reporter:  lafpark  |      Owner:  rseichter
      Type:  defect   |     Status:  assigned
  Priority:  Normal   |  Milestone:
 Component:  ports    |    Version:  2.6.3
Resolution:           |   Keywords:
      Port:  notmuch  |
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Comment (by rseichter):

 What still surprises me is that, as you wrote, the realpath command
 returns an empty string on your machine. This is what happens here when
 the call fails:
 {{{
 → which realpath
 /opt/local/bin/realpath

 → realpath does_not_exist
 realpath: /Users/ralph/does_not_exist: No such file or directory
 }}}
 I don't know what could cause realpath to return an empty string.

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Ticket URL: <https://trac.macports.org/ticket/61310#comment:11>
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