Revision: 33392
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at October 8, 2010 10:49 by oznek
Updated Code
#!/bin/sh # put a version number "1.2.3.4" in the form "1 2 3 4" filter_version() { echo $1 | sed 's/\./ /g' } # reverse the order: "1 2 3 4" become "4 3 2 1" reverse_order() { for n in $@ do reverse="$n $reverse"; done echo $reverse } # build an integer version number build_version() { multiplier=1 version=0; for i in $@ do temp=$(( $multiplier * $i )) version=$(( $version + $temp )) multiplier=$(( $multiplier * 1000 )) done echo $version } # example VERSION="1.2.3.4" filtered=$(filter_version $VERSION) reversed=$(reverse_order $filtered) build_version $reversed
Revision: 33391
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at October 8, 2010 10:38 by oznek
Initial Code
#!/bin/sh # put a version number "1.2.3.4" in the form "1 2 3 4" filter_version() { echo $1 | head -1 |cut -d\ -f 2 | sed 's/\./ /g' } # reverse the order: "1 2 3 4" become "4 3 2 1" reverse_order() { for n in $@ do reverse="$n $reverse"; done echo $reverse } # build an integer version number build_version() { multiplier=1 version=0; for i in $@ do temp=$(( $multiplier * $i )) version=$(( $version + $temp )) multiplier=$(( $multiplier * 1000 )) done echo $version } # example VERSION="1.2.3.4" filtered=$(filter_version $VERSION) reversed=$(reverse_order $filtered) build_version $reversed
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A \"simple\" way to build a version number to compare in your shell scripts
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Build a shell script comparable version number
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