#!/bin/bash

usage() {
    me=`basename "$0"`
    echo >&2 "Usage: $me [--help] [--tag TAG] [--gerrit-url URL] [IMAGE]"
    exit 1
}

while test $# -gt 0 ; do
  case "$1" in
  --help)
    usage
    ;;

  --tag)
    shift
    TAG=$1
    shift
    ;;

  --gerrit-url)
    shift
    GERRIT_WAR_URL=$1
    shift
    ;;

  *)
    break
  esac
done

#Get list of images
source container-images/publish_list
IMAGES=$(get_image_list)

if test -n "$GERRIT_WAR_URL"; then
    BUILD_ARGS="--build-arg GERRIT_WAR_URL=$GERRIT_WAR_URL"
fi

test -z "$TAG" && TAG=latest

export GIT_REV_TAG="$(git describe --always --dirty)-unknown"

docker_build(){
    IMAGE=$1

    docker build -t k8sgerrit/$IMAGE:$TAG \
        -t k8sgerrit/$IMAGE:$GIT_REV_TAG \
        ./container-images/$IMAGE

    if test $? -ne 0; then
        REPORT="$REPORT Failed: k8sgerrit/$IMAGE.\n"
        RETURN_CODE=1
    else
        REPORT="$REPORT Success: k8sgerrit/$IMAGE:$TAG\n Success: k8sgerrit/$IMAGE:$GIT_REV_TAG\n"
    fi
}

docker_build_gerrit_base(){
    docker build $BUILD_ARGS -t gerrit-base ./container-images/gerrit-base
    if test $? -ne 0; then
        echo -e "\n\nFailed to build gerrit-base image."
        exit 1
    fi
}

create_image_tag(){
    GERRIT_VERSION=$(docker run --entrypoint "/bin/sh" gerrit-base \
        -c "java -jar /var/gerrit/bin/gerrit.war version")
    GERRIT_VERSION=$(echo "${GERRIT_VERSION##*$'\n'}" | cut -d' ' -f3 | tr -d '[:space:]')
    GIT_REV_TAG="$(git describe --dirty)-$GERRIT_VERSION"
}

REPORT="Build results: \n"
RETURN_CODE=0

docker build -t base ./container-images/base
if test $? -ne 0; then
    echo -e "\n\nFailed to build base image."
    exit 1
fi

if test $# -eq 0 ; then
    docker_build_gerrit_base
    create_image_tag
    for IMAGE in $IMAGES; do
        docker_build $IMAGE
    done
else
    while test $# -gt 0 ; do
        if [[ $1 = gerrit-* ]]; then
            docker_build_gerrit_base
            create_image_tag
        else
            echo -e "\nNo Image containing Gerrit will be built." \
                    "The Gerrit-version can thus not be determinded." \
                    "Using tag $GIT_REV_TAG\n"
        fi
        docker_build $1
        shift
    done
fi

echo -e "\n\n$REPORT"
exit $RETURN_CODE