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package specgenutil
import (
"fmt"
"github.com/docker/go-connections/nat"
)
func verifyExpose(expose []string) error {
// add the expose ports from the user (--expose)
// can be single or a range
for _, expose := range expose {
// support two formats for expose, original format <portnum>/[<proto>] or <startport-endport>/[<proto>]
_, port := nat.SplitProtoPort(expose)
// parse the start and end port and create a sequence of ports to expose
// if expose a port, the start and end port are the same
_, _, err := nat.ParsePortRange(port)
if err != nil {
return fmt.Errorf("invalid range format for --expose: %s: %w", expose, err)
}
}
return nil
}
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