use chardetng::EncodingDetector;
// use encoding_rs::Encoding;

    fn decode_file(&mut self, file: &str, buffer: &mut Vec<u8>) -> Result<(), Self::Error> {
        let mut uncoded = Vec::new();
        self.read_file(&file, &mut uncoded)?;
        let (mut decoded, encoding) = if tree_magic_mini::from_u8(&uncoded).starts_with("text/") {
            let mut detector = EncodingDetector::new();
            detector.feed(&uncoded, true);
            let encoding = detector.guess(None, true);
            debug!("guessed encoding = {:?}", encoding.name());
            let (decoded, encoding, malformed) = encoding.decode(&uncoded);
            debug!("final encoding = {:?}", encoding.name());
            if !malformed {
                (decoded.as_bytes().to_vec(), Some(encoding))
            } else {
                warn!("text file was malformed");
                (uncoded, None)
            }
        } else {
            (uncoded, None)
        };
        buffer.append(&mut decoded);
        Ok(())
    }

use chardetng::EncodingDetector;
// use encoding_rs::Encoding;

            let mut uncoded = Vec::new();
            working_copy.read_file(&item.full_path, &mut uncoded)?;
            let encoding = if tree_magic_mini::from_u8(&uncoded).starts_with("text/") {
                let mut detector = EncodingDetector::new();
                detector.feed(&uncoded, true);
                let encoding = detector.guess(None, true);
                debug!("guessed encoding = {:?}", encoding.name());
                let (decoded, encoding, malformed) = encoding.decode(&uncoded);
                debug!("final encoding = {:?}", encoding.name());
                if !malformed {
                    self.rec.contents.append(&mut decoded.as_bytes().to_vec());
                    Some(encoding)
                } else {
                    warn!("text file was malformed");
                    self.rec.contents.append(&mut uncoded);
                    None
                }
            } else {
                self.rec.contents.append(&mut uncoded);
                None
            };

            working_copy.decode_file(&item.full_path, &mut self.rec.contents)?;

                    .read_file(&item.full_path, &mut b)

                    .decode_file(&item.full_path, &mut b)