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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