[MacPorts] #62868: ARB fails to run with MacPorts Installation

[MacPorts]

#62868: ARB fails to run with MacPorts Installation
------------------------+--------------------
 Reporter:  Channy-736  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  ports       |    Version:  2.6.4
 Keywords:  ARB         |       Port:
------------------------+--------------------
 I've installed the latest version of ARB (6.0.2) through Macports (2.6.4)
 with Xcode (12.5) on macOS Big Sur 11.3.1. When I try to run arb by typing
 in the terminal the command:
 {{{
 arb
 }}}

 I get the following error:

 {{{
 /opt/local/bin/arb: line 94: ARBHOME: unbound variable
 }}}

 Next, I manually set the path to the location of the arb Unix Executable
 file, located in /opt/local/bin/arb using the following lines of code:
 {{{
 ARBHOME=/opt/local/bin/arb;export ARBHOME
 PATH=/opt/local/bin/arb:$PATH
 export PATH
 }}}

 but then once I try running arb again, I get an error different from the
 user's in this issue: https://trac.macports.org/ticket/47262 (I don't get
 the Can't open display: :0 error):

 {{{
 chantel at MacBook-Pro-2 ~ % arb
 Ignoring set ARBHOME '/opt/local/bin/arb' (overridden by explicit call of
 '/opt/local/bin/arb')
 Using ARBHOME='/opt/local/bin/arb'
 /opt/local/bin/arb: line 55:
 Fusion.app/Contents/Public:/opt/X11/bin:/Library/Apple/usr/bin:/Library/Frameworks/Mono.framework/Versions/Current/Commands:
 No such file or directory
 Using properties from /Users/chantel/.arb_prop
 Directory /Users/chantel/.arb_prop not found - creating ...
 Directory /Users/chantel/.arb_pts not found - creating ...
 Directory /Users/chantel.arb_prop/macros not found - creating ...
 Directory /opt/local/bin/arb/lib/macros not found - creating ...
 mkdir: /opt/local/bin/arb/lib: Not a directory
 Please wait while the program ARB is starting .....
 Waiting for '/Users/chantel/.arb_tmp/sockets/arb_launcher.62500'..
 [arb_launcher[0]: Starting 'arb_ntree'..]
 **Fatal ERROR: Environment Variable ARBHOME not found !!!**
    Please set 'ARBHOME' to the installation path of ARB
 ARB: Loading 'ntree.arb'
 Environment variable 'ARBHOME' should contain the path of an existing
 directory.
 (current content '/opt/local/bin/arb' has been ignored.)
 **Fatal ERROR: Environment Variable ARBHOME not found !!!**
    Please set 'ARBHOME' to the installation path of ARB
 Environment variable 'ARBHOME' should contain the path of an existing
 directory.
 (current content '/opt/local/bin/arb' has been ignored.)
 [arb_launcher[0]: 'arb_ntree' has terminated with error 1]
 [arb_launcher[0]: All launched processes terminated]

 Session log has been stored in
 /Users/chantelbiegler/.arb_prop/logs/session.20210510_211933.62509.tgz
     and is also accessible via /Users/chantelbiegler/ARB_last_session.tgz

 ARB terminated abnormally

 }}}

 The run log has the following output:

 {{{
 [arb_launcher[0]: Starting 'arb_ntree'..]
 Fatal ERROR: Environment Variable ARBHOME not found !!!
    Please set 'ARBHOME' to the installation path of ARB
 ARB: Loading 'ntree.arb'
 Environment variable 'ARBHOME' should contain the path of an existing
 directory.
 (current content '/opt/local/bin/arb' has been ignored.)
 Fatal ERROR: Environment Variable ARBHOME not found !!!
    Please set 'ARBHOME' to the installation path of ARB
 Environment variable 'ARBHOME' should contain the path of an existing
 directory.
 (current content '/opt/local/bin/arb' has been ignored.)
 [arb_launcher[0]: 'arb_ntree' has terminated with error 1]
 [arb_launcher[0]: All launched processes terminated]
 }}}

 TL;DR - Clearly, there is something **wrong with ARBHOME**, based on the
 fatal error that says **the environmental variable ARBHOME isn't found**.
 I just have no idea how to fix that.

 My apologies if this is a noob question - I'm brand new to ARB and I've
 found the installation process to be archaically difficult, but maybe
 that's just me. I have searched the forums, but I haven't found anything
 else I can try for this issue.

 Thank you so much, I would really appreciate it if I could get this
 working!!

-- 
Ticket URL: <https://trac.macports.org/ticket/62868>
MacPorts <https://www.macports.org/>
Ports system for macOS