fun with command line arguments

cmd_args.go

package main

import (
        "flag"
        "fmt"
)

func main() {
        var (
                secureAddress   = flag.Bool("secure", false, "Set https as protocol")
                hostAddress     = flag.String("host", "example.com", "Hostname, include port if non-standard. i.e. example.com:8080")
                hostPath        = flag.String("path", "/", "Path URI.")
                whatProto string
        )
        flag.Parse()

        if *secureAddress {
                whatProto = "https"
        } else {
                whatProto = "http"
        }

        fmt.Println(whatProto + "://" + *hostAddress + *hostPath)
}

cmd_args_example.txt

# ./cmd_args 
http://example.com:80/

# ./cmd_args --help
Usage of ./cmd_args:
  -host string
    	Hostname, include port if non-standard. i.e. example.com:8080 (default "example.com")
  -path string
    	Path URI. (default "/")
  -secure
    	Set https as protocol

# ./cmd_args -secure -host google.com -path /robots.txt
https://google.com/robots.txt

# ./cmd_args -secure -host google.com:8443 -path /robots.txt
https://google.com:8443/robots.txt