#!/usr/bin/env bash

set -e

if [[ "${USER}" != "{{ beacon_node_builds_user }}" ]]; then
    echo "Incorrect user: ${USER}" >&2
    echo "Expected: {{ beacon_node_builds_user }}" >&2
    exit 1
fi

IMAGE="{{ beacon_node_builds_image_name }}"
TAG="{{ item.name }}"

# Build the Beacon node binaries
pushd repo

COMMIT_BEFORE=$(git rev-parse --short=8 HEAD)
SYMBOLIC_NAME=$(git rev-parse --abbrev-ref --symbolic-full-name HEAD)

function headIsDetached() { [[ "${SYMBOLIC_NAME}" == "HEAD" ]]; }

# Detached HEAD means we're probably on a tag
if headIsDetached; then
    echo "Deatached HEAD, nothing to fetch."
else
    # We cannot use "git pull" in here, because history may be changed upstream
    git fetch
    git reset --hard origin/{{ item.version }}
fi

COMMIT_AFTER=$(git rev-parse --short=8 HEAD)

if [[ "$1" == "--force" ]]; then
    echo "Forcing rebuild!"
elif ! headIsDetached && [[ "${COMMIT_BEFORE}" == "${COMMIT_AFTER}" ]]; then
    echo "Nothing new to build."
    exit
fi

# Lower CPU and I/O priority so it doesn't affect the running beacon node
NICE="nice -n 19 ionice -c2 -n7"

${NICE} make -j1 update
${NICE} make -j1 {{ item.targets | join(" ") }} \
    LOG_LEVEL="TRACE" NIMFLAGS="-d:testnet_servers_image -d:noSignalHandler"

# Keep some copies of the resulting binaries, to be used for debugging in case of core dumps
cp -a build/nimbus_beacon_node "build/nimbus_beacon_node_{{ item.name }}_$(date +%F_%H-%M-%S)"
# Delete copies that are older than 7 days
find build -name 'nimbus_beacon_node_*' -mtime +7 -exec rm '{}' \+

popd

# Add binary into a simple Alpine image
docker build -t "${IMAGE}:${COMMIT_AFTER}" \
    --label "commit=${COMMIT_AFTER}" \
    --build-arg=COMMIT=${COMMIT_AFTER} .
docker tag "${IMAGE}:${COMMIT_AFTER}" "${IMAGE}:${TAG}"
docker push "${IMAGE}:${TAG}"

echo "SUCCESS - pushed: ${IMAGE}:${TAG}"