[MacPorts] #56381: It would be nice if shell mode saved command history immediately

[MacPorts]

#56381: It would be nice if shell mode saved command history immediately
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 Reporter:  ylluminarious  |      Owner:  (none)
     Type:  enhancement    |     Status:  new
 Priority:  Normal         |  Milestone:
Component:  base           |    Version:  2.4.3
 Keywords:                 |       Port:
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 Hi,

 I'm new to Macports so I hope that this ticket is not a duplicate and that
 it meets the Ticket Guidelines. Anyway, as I was using Macports' shell
 mode, I noticed history is only saved after the main command loop exits.
 This approach has a major drawback (which I've often been a victim of
 while using {{{bash}}}).

 If the {{{port}}} process is abruptly killed, then that session's history
 is gone. This can happen by pressing {{{^C}}} twice, which can quite
 easily happen as an accident. There are also a myriad of other dangers
 which could abruptly kill a `port` shell session before its time.

 It would be nice if each command got written to the history file right
 after it was entered. This is how {{{zsh}}} does it and I've always been
 fond of it, since you always know that your history is saved. I looked in
 [https://github.com/macports/macports-
 base/blob/v2.4.3/src/port/port.tcl#L4855 src/port/port.tcl] to see if
 there was a setting to enable such behavior, but I see no such setting
 there. Specifically, I looked in the {{{process_command_file}}} procedure,
 but found nothing relating to this.

-- 
Ticket URL: <https://trac.macports.org/ticket/56381>
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