gzipFile function
Compresses the file at input to the gzip file output. With
parallel (the default), it uses every core; the output is one standard
gzip stream.
Implementation
Future<void> gzipFile(String input, String output,
{int? level, bool parallel = true}) {
final l = level ?? -1;
return Isolate.run(
() => files.compressFile(StreamFormat.gzip, input, output, l, parallel));
}