#!/usr/bin/env bash
# Build the match image.
#
#   ./scripts/build.sh                 # tag from versions.env
#   IMAGE_TAG=dev ./scripts/build.sh
#   ./scripts/build.sh --no-cache
#
# Downloads land in a BuildKit cache mount, so the ~1.1GB of third-party
# artifacts is fetched once per machine and reused by every later build. Note
# --no-cache rebuilds every layer but does NOT empty the download cache. To drop
# the downloads too: docker builder prune -f --filter type=exec.cachemount
set -euo pipefail

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
# shellcheck source=versions.env
. "$ROOT/versions.env"
cd "$ROOT"

export DOCKER_BUILDKIT=1

# BUILD_REF comes from versions.env (it is part of the tag) and is also
# recorded in an image label so a running task traces back to a commit.
#
# One tag, and it is the unique one. `latest` used to be applied here as a
# `docker run` convenience, but this machine runs several agent sessions at
# once and every build repointed `latest` under anyone else resolving it -
# including scripts/arena.sh, whose --image selector accepts it. A moving tag
# that several writers share is not a convenience. Use the printed tag, or
# `scripts/image.sh` which resolves the newest local build by digest.
IMAGE="${IMAGE_NAME}:${IMAGE_TAG}"

echo "building $IMAGE (MegaMek $MEGAMEK_VERSION, Suramadu $SURAMADU_VERSION, ref $BUILD_REF)"

docker build \
  --build-arg "JDK_VERSION=$JDK_VERSION" \
  --build-arg "JDK_URL_TAG=$JDK_URL_TAG" \
  --build-arg "JDK_ARCHIVE=$JDK_ARCHIVE" \
  --build-arg "JDK_SHA256=$JDK_SHA256" \
  --build-arg "JDK_DIR=$JDK_DIR" \
  --build-arg "JRE_MODULES=$JRE_MODULES" \
  --build-arg "MEGAMEK_VERSION=$MEGAMEK_VERSION" \
  --build-arg "MEGAMEK_RELEASE_DIR=$MEGAMEK_RELEASE_DIR" \
  --build-arg "MEGAMEK_SRC_DIR=$MEGAMEK_SRC_DIR" \
  --build-arg "MEGAMEK_RELEASE_SHA256=$MEGAMEK_RELEASE_SHA256" \
  --build-arg "MEGAMEK_SRC_SHA256=$MEGAMEK_SRC_SHA256" \
  --build-arg "SURAMADU_VERSION=$SURAMADU_VERSION" \
  --build-arg "SURAMADU_WAR=$SURAMADU_WAR" \
  --build-arg "SURAMADU_SHA256=$SURAMADU_SHA256" \
  --build-arg "BUILD_REF=$BUILD_REF" \
  --target runtime \
  --tag "$IMAGE" \
  "$@" \
  .

echo
docker image inspect "$IMAGE" --format "built {{index .RepoTags 0}}  {{.Size}} bytes"