Function command_pipe 

pub fn command_pipe(
    command: &mut Command,
    piped: &mut Command,
) -> Result<Output, Error>

Pipe stdout of command to stdin of piped command

Errors

command_pipe can result in std::io::Error

• when spawn or wait fail
• when there is an issue with the stdout / stdin pipe (std::io::ErrorKind::BrokenPipe)