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#!/bin/bash
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements. See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership. The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
#
#
# The build has two stages: "docker" and "test"
# The "docker" stage is meant to rebuild the docker images
# if needed. If we cannot push that result however then
# there is no reason to do anything.
# The "test" stage is an actual test job. Even if the docker
# image doesn't match what's in the repo, we still build
# the image so the build job can run properly.
#
set -e
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
DOCKER_TAG=$DOCKER_REPO:$DISTRO
function dockerfile_changed {
# image may not exist yet, so we have to let it fail silently:
docker pull $DOCKER_TAG || true
docker run $DOCKER_TAG bash -c 'cd .. && sha512sum Dockerfile' > .Dockerfile.sha512
sha512sum -c .Dockerfile.sha512
}
#
# If this build has no DOCKER_PASS and it is in the docker stage
# then there's no reason to do any processing because we cannot
# push the result if the Dockerfile changed.
#
if [[ "$TRAVIS_BUILD_STAGE" == "docker" ]] && [[ -z "$DOCKER_PASS" ]]; then
echo Detected docker stage build and no defined DOCKER_PASS, this build job will be skipped.
echo Subsequent jobs in the test stage may each rebuild the docker image.
exit 0
fi
pushd ${SCRIPT_DIR}/$DISTRO
if dockerfile_changed; then
echo Dockerfile has not changed. No need to rebuild.
exit 0
else
echo Dockerfile has changed.
fi
popd
#
# Dockerfile has changed - rebuild it for the current build job.
# If it is a "docker" stage build then we want to push it back
# to the DOCKER_REPO. If it is a "test" stage build then we do
# not. If nobody defined a DOCKER_PASS then it doesn't matter.
#
echo Rebuilding docker image $DISTRO
# https://docs.travis-ci.com/user/common-build-problems/#build-times-out-because-no-output-was-received
# adding `travis_wait` because kerl building in the docker file takes >10 min for building erlang
# without printing to stdout, resulting in build failures
travis_wait 45 docker build --tag $DOCKER_TAG build/docker/$DISTRO
if [[ "$TRAVIS_BUILD_STAGE" == "docker" ]] && [[ ! -z "$DOCKER_USER" ]] && [[ ! -z "$DOCKER_PASS" ]]; then
echo Pushing docker image $DOCKER_TAG
docker login -u $DOCKER_USER -p $DOCKER_PASS
docker push $DOCKER_TAG
else
echo Not pushing docker image: either not a docker stage build job, or one of DOCKER_USER or DOCKER_PASS is undefined.
fi
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