Imports github.com/Rethunk-Tech/go-safefs github.com/Rethunk-Tech/go-lenientjson github.com/Rethunk-Tech/go-tilemask Standard library imports bufio bytes compress/gzip crypto/sha256 encoding/base64 encoding/binary encoding/gob encoding/hex encoding/json errors fmt image image/draw image/png io os path/filepath reflect regexp runtime runtime/debug strconv strings sync sync/atomic time io/fs unique cmp slices maps iter