#!/bin/bash

TOPDIR=$(git rev-parse --show-toplevel)

RELEASE_NAMESPACE=kollaglue
NAMESPACE=kollaglue
PREFIX=fedora-rdo-
TAG=$(git rev-parse --short HEAD)

usage () {
    cat <<EOF
$0: usage: $0 [options]

Options:

--namespace, -n <namespace>
--tag, -t <tag>
--push, -p
--no-cache, -N
--release
EOF
}

[ -f ./.buildconf ] && . ./.buildconf
[ -f $TOPDIR/.buildconf ] && . $TOPDIR/.buildconf

ARGS=$(getopt -o 'n:t:pN' -l help,namespace:,push,release,tag:,no-cache -- "$@") || { usage >&2; exit 2; }

eval set -- "$ARGS"

while :; do
    case "$1" in

    (--help)    usage
                exit 0
                ;;

    (--release) MODE=release
                NAMESPACE=$RELEASE_NAMESPACE
                TAG=latest
                ;;

    (--tag|-t)  shift
                TAG="$1"
                ;;

    (--push|-p) PUSH=1
                ;;

    (--no-cache|-N)
                BUILDFLAGS="${BUILDFLAGS} --no-cache"
                ;;

    (--namespace|-n)
                shift
                NAMESPACE="$1"
                ;;

    (--)        break
                ;;

    esac

    shift
done

if [ "$NAMESPACE" = "$RELEASE_NAMESPACE" ] \
    && [ "$TAG" = "latest" ] \
    && ! [ "$MODE" = "release" ]; then

    echo "ERROR: use --release to build a release image" >&2
    exit 1
fi

IMAGE="${PREFIX}${PWD##*/}"
FULLIMAGE="${NAMESPACE}/${IMAGE}${TAG:+:${TAG}}"

cat <<EOF
======================================================================
$FULLIMAGE
======================================================================

EOF

if [ "$MODE" = "release" ]; then
    echo "*** YOU ARE BUILDING A RELEASE IMAGE ***"
    echo
fi

if ! docker build ${BUILDFLAGS} -t "$FULLIMAGE" .; then
    echo "ERROR: failed to build $FULLIMAGE"
    exit 1
fi

echo "Built: $FULLIMAGE"

if [ "$PUSH" = 1 ]; then
    if ! docker push "$FULLIMAGE"; then
        echo "ERROR: failed to push $FULLIMAGE"
        exit 1
    fi

    echo "Pushed: $FULLIMAGE"
fi