broken pipe error

[MartinMartimeo]

$ ./pkictl create-private --type=rsa --length=2048 | ./pkictl create-public -private-key="STDIN"                                                                                                                                                                            
Flags invalid: Error reading private key: stat STDIN: no such file or directory
Usage: ./pkictl create-public [flags]

where flags is any of:
  -output="STDOUT": path to the output or STDOUT
  -private-key="": path to the private key (required)

example:
    create-public -private-key=foo.ecdsa
Error when writing output: write /dev/stdout: broken pipe

[Gibheer]

Maybe this and #5 could be merged to one function opening the correct file handle. Something like the following

func openFile(path, default_name, default) (io.ReadWriteCloser) {
  if path == "-" || path == default_name { return open default }
  return os.OpenFile(path)
}