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#!/bin/bash
# `vercomp()` is copied from: http://stackoverflow.com/a/4025065
# Usage: vercomp <version 1> <version 2>
# return codes:
# 0: version 1 and version 2 are the same
# 1: version 1 is higher
# 2: version 2 is higher
vercomp () {
if [[ $1 == $2 ]]
then
return 0
fi
local IFS=.
local i ver1=($1) ver2=($2)
# fill empty fields in ver1 with zeros
for ((i=${#ver1[@]}; i<${#ver2[@]}; i++))
do
ver1[i]=0
done
for ((i=0; i<${#ver1[@]}; i++))
do
if [[ -z ${ver2[i]} ]]
then
# fill empty fields in ver2 with zeros
ver2[i]=0
fi
if ((10#${ver1[i]} > 10#${ver2[i]}))
then
return 1
fi
if ((10#${ver1[i]} < 10#${ver2[i]}))
then
return 2
fi
done
return 0
}
vercomp $1 $2
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