# This file is part of shellfire version. It is subject to the licence terms in the COPYRIGHT file found in the top-level directory of this distribution and at https://raw.githubusercontent.com/shellfire-dev/version/master/COPYRIGHT. No part of shellfire version, including this file, may be copied, modified, propagated, or distributed except according to the terms contained in the COPYRIGHT file.

# Copyright © 2014-2015 The developers of shellfire version. See the COPYRIGHT file in the top-level directory of this distribution and at https://raw.githubusercontent.com/shellfire-dev/version/master/COPYRIGHT.

version_isLessThan()

{

_version_is eq 0 "$@"

}

version_isEqualTo()

{

_version_is eq 1 "$@"

}

version_isGreaterThan()

{

_version_is eq 2 "$@"

}

version_isLessThanOrEqualTo()

{

_version_is le 1 "$@"

}

version_isGreaterThanOrEqualTo()

{

_version_is ge 1 "$@"

}

_version_is()

{

local operator=$1

local expectedCode=$2

shift 2

set +e

version_compare "$@"

local exitCode=$?

set -e

if [ $exitCode -$operator $expectedCode ]; then

return 0

fi

return 1

}

# 0 is less than

# 1 is equal to

# 2 is greater than

version_compare()

{

local leftVersion="$1"

local rightVersion="$2"

if [ "$leftVersion" = "$rightVersion" ]; then

return 1

fi

local leastVersion

read -r leastVersion <<-EOF

$(_version_compare_sort)

EOF

if [ "$leastVersion" = "$leftVersion" ]; then

return 0

fi

return 2

}

_version_compare_sort()

{

sort -n -t '.' -k 1,1n -k 2,2n -k 3,4n -k 4,4n -k 5,5n -k 6,6n -k 7,7n <<-EOF

${leftVersion}

${rightVersion}

EOF

}