fixed.rs

fn convert_to_html(input: &str) -> String {
    let cmd = Command::new("pandoc")
            .args(&["--from=markdown", "--to=html"])
            .stdin(Stdio::piped())
            .stdout(Stdio::piped())
            .spawn()
            .expect("pandoc failed to start");
    {
        let mut pandoc_stdin = cmd.stdin.unwrap();
        pandoc_stdin.write_all(& input.as_bytes());
    }
    // write!(pandoc_stdin, "# header").unwrap();
    let mut pd_out_bytes = Vec::new();
    // let mut stdout_out: [u8] = [];
    println!("Gets here");
    cmd.stdout.unwrap().read_to_end(&mut pd_out_bytes);
    println!("Does not get here");
    return String::from_utf8(pd_out_bytes).unwrap();
}

pandoc_waiting.rs

fn convert_to_html(input: &str) -> String {
    let cmd = Command::new("pandoc")
            .args(&["--from=markdown", "--to=html"])
            .stdin(Stdio::piped())
            .stdout(Stdio::piped())
            .spawn()
            .expect("pandoc failed to start");
    let mut pandoc_stdin = cmd.stdin.unwrap();
    write!(pandoc_stdin, "# header").unwrap();
    let mut pd_out_bytes = Vec::new();
    // let mut stdout_out: [u8] = [];
    println!("Gets here");
    cmd.stdout.unwrap().read_to_end(&mut pd_out_bytes);
    println!("Does not get here");
    return String::from_utf8(pd_out_bytes).unwrap();
}