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package helper
import (
"io/ioutil"
"net"
"os"
"path"
"strconv"
)
func getFirstAvailablePortFrom(port int) int {
for {
if isPortAvailable(port) {
return port
}
if port > 65535 {
return 0
}
port += 1
}
}
func isPortAvailable(port int) bool {
conn, err := net.Dial("tcp", "127.0.0.1:"+strconv.Itoa(port))
if err != nil {
return true
} else {
defer conn.Close()
return false
}
}
func writePortToFile(port int) error {
exeDir, err := getExecutableDir()
if err != nil {
return err
}
portFile := path.Join(exeDir, "port")
return ioutil.WriteFile(portFile, []byte(strconv.Itoa(port)+"\n"), 0644)
}
func getExecutableDir() (string, error) {
ex, err := os.Executable()
if err != nil {
return "", err
}
return path.Dir(ex), nil
}
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