zerotier download debian and uncompress

downloadLatestZerotier.sh

#!/bin/bash

v=$1
if [ "$v" == "" ] ; then
	v=-1
fi

list=$(curl -L 'https://download.zerotier.com/RELEASES/' | gzip -d || curl -L 'https://download.zerotier.com/RELEASES/')
list=$(echo "$list" | awk -F'"' '{print $2}' | sort -V )
n=$(echo "$list" | wc -l | egrep -v '^$')
let n=$n-5
for l in $list ; do
	echo -$n $l
	let n=$n-1
done
last=$(echo "$list" | tail $v | head -1 )

cmd="curl -L 'https://download.zerotier.com/RELEASES/$last/dist/debian/buster/'"
echo $cmd
files=$(eval $cmd || curl -L "https://download.zerotier.com/RELEASES/$last/dist/debian/buster/" | gzip -d )
file=$(echo "$files" | grep amd | grep .deb | awk -F'"' '{print $2}')

cmd="curl -O -L 'https://download.zerotier.com/RELEASES/$last/dist/debian/buster/$file'"
echo $cmd
eval $cmd

if [ -e $file ] ; then
	dir=$(echo $file | sed 's/.deb//')
	mkdir -p $dir
	cd $dir
	ar x ../$file
	tar xf data.*
	rm data.* control.* debian-*
	rm ../$file
fi

Downloads zerotier .deb packages (buster) and compresses it.
It lists all available versions, and one can pass a -N argument to select what version to download. Default is -1.