Have a look at:
https://github.com/chzyer/readline
https://github.com/chzyer/readline/blob/master/example/readline-demo/readline-demo.go
On Tuesday, 17 December 2019 09:10:28 UTC-5, Rich wrote:
>
> I need to write a program that runs an external program and the user needs
> to interact with that external program. So I know I can do something like
> this:
>
>
> func main() {
> cmd := exec.Command("/usr/local/bin/interactiveApp")
> cmd.Stdin = os.Stdin
> cmd.Stdout = os.Stdout
> cmd.Stderr = os.Stderr
> cmd.Run()
>
> What I need to be able to do is look at what the user is typing as the
> user can make some errors that would be unfortunate, So what I want to do
> is look at what the user typed and tell them that isn't possible. If the
> command is good send it.
>
> User: "self destruct in 10 minutes"
> MyApp: "sorry you can't do that."
>
> This is very similar to what you can do with Don Libes's Expect interact
> statement which works like a switch statement, if a match is found, it runs
> that instead of what the user typed.
>
> spawn "/usr/local/bin/interactiveApp"
> ...stuff...
>
> interact {
> "self destruct" {
> send_user "Sorry you can't run that"
> send "start over"
> }
> }
>
> So if the user types "self destruct" the program will send a message to
> the user, and then send 'start over' to the interactiveApp. I've looked
> around and I've not seen anything that can reliably read from what the user
> types in, evaluate it, and pass it to the program that is launched by exec.
>
> I didn't write the app we're running, and the guy that wrote it is not
> able to support it any longer. I"d write it in expect but expect uses TCL
> which is very very slow, and there are other aspects to Go that I really
> need in other areas of the program.
>
> Thanks!
>
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