[MacPorts] #74254: Found one of the reasons for failing to the infamous `Failed to verify signature for MacPorts source`.

[MacPorts]

#74254: Found one of the reasons for failing to the infamous `Failed to verify
signature for MacPorts source`.
---------------------+--------------------
  Reporter:  Lisias  |      Owner:  (none)
      Type:  defect  |     Status:  new
  Priority:  Normal  |  Milestone:
 Component:  base    |    Version:  2.12.5
Resolution:          |   Keywords:
      Port:          |
---------------------+--------------------
Changes (by jmroot):

 * priority:  Not set => Normal
 * keywords:  TMPDIR checksum signature signature =>


Comment:

 Thanks for the report. You could add something like this before changing
 TMPDIR to find out what value is initially set for it, if any:
 {{{
 if {[info exists ::env(TMPDIR)]} {
     ui_msg "TMPDIR = $::env(TMPDIR)"
 } else {
     ui_msg "TMPDIR is not set in the environment"
 }
 }}}
 If TMPDIR is nonexistent or not writable, Tcl should theoretically fall
 back to using /tmp, which is a link to /private/tmp on macOS. So maybe
 check the permissions on that as well.

-- 
Ticket URL: <https://trac.macports.org/ticket/74254#comment:2>
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