Function from_path 

pub fn from_path<'a, P: AsRef<Path>>(
    path: P,
) -> Result<(Box<dyn Read + 'a>, Format), Error>

Open a possibly compressed file and decompress it transparently.

use niffler_temp::{Error, compression};



let (mut reader, format) = niffler_temp::from_path(file.path())?;

let mut contents = vec![];
reader.read_to_end(&mut contents);