Function extract_propline

cli/src/propline.rs:81–100

Extracts the property line from `path` if present.

(path: P)

/// Extracts the property line from `path` if present.
pub fn extract_propline<P: AsRef<Path>>(path: P) -> io::Result<PropLine> {
    let input = File::open(path)?;
    let mut input = BufReader::new(input);

    let mut line1 = String::new();
    if input.read_line(&mut line1)? == 0 {
        return Ok(PropLine::default());
    }
    strip_newline(&mut line1);
    if !line1.starts_with("#!") {
        return Ok(PropLine::default());
    }

    let mut line2 = String::new();
    if input.read_line(&mut line2)? == 0 {
        return Ok(PropLine::default());
    }
    strip_newline(&mut line2);
    parse_propline(&line2)
}

#[cfg(test)]
mod tests {