Package arc handles interactions with the mholt archiver package. This should
be used as the primary means of interacting with file archives before using
external archive programs.
var (
ErrNoCustom = errors.New("does not support customization")
ErrWalkrFmt = errors.New("format specified by archive filename is not a walker format")
ErrPanic = errors.New("mholt panic with the archive")
)
Walkr calls walkFn for each file within the given archive file.
The archive format is chosen implicitly.
Archiver relies on the filename extension to determine which
decompression format to use, which must be supplied using filename.