[MacPorts] #68836: Should clean up DISPLAY=:0 setting from MacPorts 2.6.4 installer

[MacPorts]

#68836: Should clean up DISPLAY=:0 setting from MacPorts 2.6.4 installer
-------------------------+--------------------
 Reporter:  khorton      |      Owner:  (none)
     Type:  enhancement  |     Status:  new
 Priority:  Normal       |  Milestone:
Component:  base         |    Version:  2.8.1
 Keywords:               |       Port:
-------------------------+--------------------
 Some users have found that XQuartz is not opening automatically due to
 DISPLAY being set to :0.  Some of these cases are due to additions to
 ~/.zprofile apparently inserted by the MacPorts 2.6.4 installer.

 Example code fragment from ~/.zprofile:

 {{{
 # MacPorts Installer addition on 2020-12-29_at_06:08:54: adding an
 appropriate DISPLAY variable for use with MacPorts.
 export DISPLAY=:0
 # Finished adapting your DISPLAY environment variable for use with
 MacPorts.
 }}}

 Diagnosis by Ryan Schmidt on macports-users list 2023-12-03:

 {{{
 The MacPorts 2.6.4 installer for macOS 11 inadvertently added the
 DISPLAY=:0 setting to shell startup files. The bug was corrected in
 MacPorts 2.7.0 but no code was ever added to clean up the mess for users
 who had already used the 2.6.4 installer.

 https://trac.macports.org/ticket/61649

 Could you file a new ticket to do that cleanup? Bonus points if you want
 to submit a pull request to implement it. See:

 https://github.com/macports/macports-base/pull/218#issuecomment-739666236
 }}}

 Ideally, a future MacPorts installer would check for the presence of
 export DISPLAY=:0 in ~/.zprofile on OS versions where it is inappropriate
 and offer to remove it, or at least bring it to the user's attention and
 direct him to remove it manually.

-- 
Ticket URL: <https://trac.macports.org/ticket/68836>
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