#!/bin/sh

# Make sure autoconf is installed and is the correct version
min_autoconf_major=2
min_autoconf_minor=59
autoconf_error="Autoconf version $min_autoconf_major.$min_autoconf_minor or later must be installed to run this script."
autoconf_version=`(autoconf -V 2> /dev/null) |\
		grep "^autoconf (GNU Autoconf)" | gawk '{print $NF}'`
if [ "$autoconf_version" != "" ] ; then
	autoconf_major=`echo $autoconf_version | gawk -F '.' '{print $1}'`
	autoconf_minor=`echo $autoconf_version | gawk -F '.' '{print $2}'`
	if [ $autoconf_major -lt $min_autoconf_major -o $autoconf_minor -lt $min_autoconf_minor ] ; then
		echo $autoconf_error
		exit 1
	fi
else
	echo $autoconf_error
	exit 1
fi

# Get date (two formats)
if [ -n "$2" ]; then
    LONGDATE=$(LC_ALL=C date -u -d "$2" "+%B %d, %Y")
    SHORTDATE=$(date -u -d "$2" "+%Y-%m-%d")
else
    LONGDATE=$(LC_ALL=C date -u -d "@${SOURCE_DATE_EPOCH:-$(date +%s)}" "+%B %d, %Y")
    SHORTDATE=$(date -u -d "@${SOURCE_DATE_EPOCH:-$(date +%s)}" "+%Y-%m-%d")
fi

# Current version number
CURRENTVERSION=3.2.1

# Last date
LASTDATE=2017-09-01

if [ "x$1" = "x" ]
then
        echo "Usage: $0 <version number | \"newdate\"> [revision date]"
        echo ""
        echo "Run this script with the name of the new version (i.e \"2.6\") to"
        echo "update version number and modification date in files."
        echo "Use the \"newdate\" argument if you want to keep the current version"
        echo "number and just update the modification date."
        echo "When using \"newdate\" you can specify the release date with"
        echo "a second argument in the form of YYYY-MM-DD."
        echo ""
        echo "Current version=$CURRENTVERSION"
        echo "Current Modification date=$LASTDATE"
        echo ""
        exit 1
fi

newversion=$1
if [ "x$newversion" = "xnewdate" ]
then
    newversion=$CURRENTVERSION
fi

# Update version number and release date in common code
perl -i -p -e "s/VERSION \".*\"/VERSION \"$1\"/;" include/common.h.in
perl -i -p -e "s/MODIFICATION_DATE \".*\"/MODIFICATION_DATE \"$SHORTDATE\"/;" include/common.h.in
perl -i -p -e "s/Last Modified: [0-9].*/Last Modified: $SHORTDATE/;" include/common.h.in

# Update version number and release date in main code
perl -i -p -e "s/Last Modified: [0-9].*/Last Modified: $SHORTDATE/;" src/nrpe.c
perl -i -p -e "s/Last Modified: [0-9].*/Last Modified: $SHORTDATE/;" src/check_nrpe.c

# Update version number and release date in configure.in
perl -i -p -e "if( /^AC_INIT/) { s/$CURRENTVERSION/$1/; }" configure.ac
perl -i -p -e "s/PKG_VERSION=.*/PKG_VERSION=\"$1\"/;" configure.ac
perl -i -p -e "s/PKG_REL_DATE=.*\"/PKG_REL_DATE=\"$SHORTDATE\"/;" configure.ac

# Run autoconf to update configure (this is easier than updating every instance
# of the version number in configure)
autoconf

# Update RPM spec file with version number
perl -i -p -e "s/%define version .*/%define version $1/;" nrpe.spec.in
perl -i -p -e "if( /\%define _docdir/) { s/$CURRENTVERSION/$1/; }" nrpe.spec.in

# Update this file with version number and last date
perl -i -p -e "s/^CURRENTVERSION=.*/CURRENTVERSION=$newversion/;" update-version
perl -i -p -e "s/^LASTDATE=.*/LASTDATE=$SHORTDATE/;" update-version