Port command, in interactive mode, doesn't load the editline config file

[SenileFelineS]

See here for background: ​https://echelog.com/logs/browse/macports/1558908000

The initial issue was that the key combination Fn+Delete should forward-delete text in the command line while running port interactively in the shell - however, it instead produces a tilde character ~. The attempt to fix this in ~/.editrc was unsuccessful. (per user jmroot)

In attempting to find out why port has this behavior, it was realized that Apple's libedit doesn't actually respect the $EDITRC environment variable. As a result, it only looks at the default $HOME/.editrc, and because port mucks around with/alters $HOME, the user's ~/.editrc is not found. (per user apjanke)

[apjanke (Andrew Janke)]

I think more specifically the problem is "Apple's libedit doesn't actually respect the $EDITRC environment variable, so it only looks at the default $HOME/.editrc, and port mucks around with $HOME, so the user's ~/.editrc is not found".