> Are you seeing the “unknown option” being output?
Yes, but I didn't see that the program stopped right after it. I am not sure why... Maybe I've misinterpreted something (I don't exclude this possibility, as I'm new to Go).
> What are your test arguments to the program?
go run test.go --name a --unknown 35I don't get why when I write
os.Exit(25) my exit status is set to
1 inside a shell instead of
25:
package main
import (
"fmt"
"os"
)
func main() {
fmt.Println("Execution started...")
os.Exit(25)
}
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And why I have
exit status 25 line printed to stderr?.. I mean, it's not a problem to
2> /dev/null it but anyway, why?
BTW, is this forum suitable for newbie in Go questions, or should I ask them somewhere else?On Tuesday, September 24, 2024 at 12:12:10 AM UTC+10 Brian Candler wrote:
What makes you think that the line which calls os.Exit(1) is being reached?
What are your test arguments to the program?
On Monday 23 September 2024 at 14:42:31 UTC+1 Maisa Unbelievable wrote:
Hello there! I don't quiet understand why os.Exit doesn't terminate my
program according to its documentation:
Exit causes the current program to exit with the given status code.
My program implements a rudimentary CLI parsing:
package main
import (
"fmt"
"os"
)
func main() {
var name string
var age string
args := os.Args[1:]
i := 0
for i+1 < len(args) {
option := args[i]
value := args[i+1]
switch option {
case "--name":
name = value
case "--age":
age = value
default:
fmt.Printf("Unknown option %s", option)
os.Exit(1) // <-- I expected this function to terminate the program
}
i += 2
}
fmt.Printf("name == %s, age == %s", name, age)
}
Basically, I wanna rewrite this Fish program to Go:
#!/usr/bin/env fish
set --local name
set --local age
set --local i 1
while set --query argv[$i]
set --local option "$argv[$i]"
set --local value "$argv[$(math $i + 1)]"
switch "$option"
case --name
set name $value
case --age
set age $value
case '*'
printf "Unknown option %s" $option
return 1 # I expected os.Exit to be a "return {{code}}" shell equivalent
end
set i (math $i + 2)
end
printf "name == %s, age == %s" $name $age
For the context: I'm new to go but have shell scripting experience.
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