- # handle compression options.
--[[ $compress ]] || compress="gzip"
-+[[ $compress ]] || compress="xz"
- case $compress in
- bzip2) compress="bzip2 -9";;
- lzma) compress="lzma -9 -T0";;
+ if ! [[ $compress ]]; then
+ # check all known compressors, if none specified
+- for i in pigz gzip lz4 lzop lzma xz lbzip2 bzip2 cat; do
++ for i in xz lzma bzip2 lbzip2 gzip pigz lz4 lzop cat; do
+ command -v "$i" &>/dev/null || continue
+ compress="$i"
+ break