dotfiles/bin/semver

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#!/bin/bash
# Sekati: Semantic Version String Manipulator
# @author jason m horwitz | sekati.com
# Copyright (C) 2012 jason m horwitz, Sekat LLC. All Rights Reserved.
NAME="semver"
DESC="Manipulate semantical version strings '<major>.<minor>.<patch>' (@see http://semver.org)."
VERSION="1.0.0"
spacer() {
echo ""
}
usage() {
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bin="$(basename $0)"
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echo "$NAME v$VERSION - $DESC"
echo "usage: $bin { -m | -n | -p } { version }"
echo " $bin [ -m ] major version increment."
echo " $bin [ -n ] minor version increment."
echo " $bin [ -p ] patch version increment."
echo " $bin [ -h --help ] script usage."
die
}
die() {
echo $@
exit 1
}
vmajor() {
VOUT=`echo $VIN | ( IFS=".$IFS" ; read a b c && echo $((a + 1 ))."0"."0" )`
}
vminor() {
VOUT=`echo $VIN | ( IFS=".$IFS" ; read a b c && echo $a.$((b + 1))."0" )`
}
vpatch() {
VOUT=`echo $VIN | ( IFS=".$IFS" ; read a b c && echo $a.$b.$((c + 1)) )`
}
VIN="$BASH_ARGV"
if test -z "$BASH_ARGV"; then
spacer
echo "Missing Version String Argument!"
spacer
usage
fi
while getopts "pmnh(-help)" flag
do
case $flag in
h|-help)
usage
break;
;;
m)
vmajor
die $VOUT
break;
;;
n)
vminor
die $VOUT
break;
;;
p)
vpatch
die $VOUT
;;
esac
done
# Default to patch if version was passed without trigger
if test -z "$BASH_ARGV"; then
exit 0
else
vpatch
die $VOUT
fi
exit 1