Passing CLI arguments to excutables with 'go run'

Question

I have a program readfile.go and I want to give the command line argument os.Args[1] also as readfile.go.

However \'go run\' thinks

Answer 1

You can use -- to separate gofiles from arguments:

go run readfile.go -- readfile.go

Answer 2

To avoid the ambiguity of getting twice readfile.go, I advise you to use named flags. This will solve the problem too.

Example:

package main

import (
    "flag"
    "fmt"
)

func main() {
    cmd := flag.String("cmd", "", "")
    flag.Parse()
    fmt.Printf("my cmd: \"%v\"\n", string(*cmd))
}

Don't forget using flag.Parse() to retrieve the command line arguments

You can pass args to the go run command this way: go run .\main.go -cmd main.go and you'll get as output:

my cmd: "main.go"

I hope this can help other.