(WIP)
Given SRC and DST path, handle situations well and produce Iterator<(reader, writer)>
.
See documentation on docs.rs.
Add wildcard matcher
and (number) range filter
to SRC.
shell
-i "./*.jpg"
-i "./4???.jpg"
-i "./{:04d}.jpg"
-i "./{1..=999:04d}.jpg"
IO multiple files from Stdio?