SCYLLA-VERSION-GEN

#!/bin/bash

PRODUCT=scylla
VERSION=666.development

if test -f version
then
	SCYLLA_VERSION=$(cat version | awk -F'-' '{print $1}')
	SCYLLA_RELEASE=$(cat version | awk -F'-' '{print $2}')
else
	DATE=$(date --utc +%Y%m%d)
	GIT_COMMIT=$(git log --pretty=format:'%h' -n 1)
	SCYLLA_VERSION=$VERSION
	SCYLLA_RELEASE=$DATE.$GIT_COMMIT
fi

usage() {
    echo "usage: $0"
    echo "           [--version product-version-release]          # override p-v-r"
    exit 1
}

OVERRIDE=
while [[ $# > 0 ]]; do
    case "$1" in
	--version)
	    OVERRIDE="$2"
	    shift 2
	    ;;
	*)
	    usage
	    ;;
    esac
done

if [[ -n "$OVERRIDE" ]]; then
    # regular expression for p-v-r: alphabetic+dashes for product, trailing non-dashes
    # for release, everything else for version
    RE='^([-a-z]+)-(.+)-([^-]+)$'
    PRODUCT="$(sed -E "s/$RE/\\1/" <<<"$OVERRIDE")"
    SCYLLA_VERSION="$(sed -E "s/$RE/\\2/" <<<"$OVERRIDE")"
    SCYLLA_RELEASE="$(sed -E "s/$RE/\\3/" <<<"$OVERRIDE")"
fi

echo "$SCYLLA_VERSION-$SCYLLA_RELEASE"
mkdir -p build
echo "$SCYLLA_VERSION" > build/SCYLLA-VERSION-FILE
echo "$SCYLLA_RELEASE" > build/SCYLLA-RELEASE-FILE
echo "$PRODUCT" > build/SCYLLA-PRODUCT-FILE