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#!/bin/bash
################################################################################
# For this script to work properly it is required to define some environment variables
# in the CI/CD Env variable declaration, while others should be passed as parameters.
#
#------------------------------------------------------------------------------
# Defined as part of the CD/CI Env Variables:
#
# CD_DOCKER_USERNAME
# A DockerHub username to be used for uploading the build.
#
# CD_DOCKER_PASSWORD
# A DockerHub password to be used for uploading the build.
#
# CD_DOCKER_REPO
# A DockerHub repository. By default the CD_REF_SLUG is also used as the docker repo.
#
# CD_BUILD_ALL
# As the build is supposed to be done only for master (for a nightly deployments) and for releases
# (like 'release-2.0.5' for production deployments), it is additionally required to include this
# variable in order to build any other brnach, as it may be required for testing or reviewing work
# as part of the development process.
#
display_usage() {
echo "This script should be used as part of a CI strategy."
echo -e "Usage:\n build_image.sh [ARGUMENTS]"
echo -e "\nMandatory arguments \n"
echo -e " repo_slug The git repository (e.g. blindsidenetworks/scalelite)"
echo -e "\nOptional arguments \n"
echo -e " branch | tag The branch (e.g. master | release-2.0.5)"
}
# if less than two arguments supplied, display usage
if [ $# -le 0 ]; then
display_usage
exit 1
fi
# check whether user had supplied -h or --help . If yes display usage
if [[ ($# == "--help") || $# == "-h" ]]; then
display_usage
exit 0
fi
export CD_REF_SLUG=$1
export CD_REF_NAME=$2
if [ -z $CD_REF_NAME ]; then
export CD_REF_NAME=$(git branch | grep \* | cut -d ' ' -f2)
fi
if [ "$CD_REF_NAME" != "master" ] && [[ "$CD_REF_NAME" != *"release"* ]] && ( [ -z "$CD_BUILD_ALL" ] || [ "$CD_BUILD_ALL" != "true" ] ); then
echo "#### Docker image for $CD_REF_SLUG:$CD_REF_NAME won't be built"
exit 0
fi
# Set the version tag when it is a release or the commit sha was included.
if [[ "$CD_REF_NAME" == *"v"* ]]; then
export CD_BUILD_NUMBER=${CD_REF_NAME:1}
else
export CD_BUILD_NUMBER="$CD_REF_NAME ($(eval git rev-parse --short=7 HEAD))"
fi
# Build the image
if [ -z $CD_DOCKER_REPO ]; then
export CD_DOCKER_REPO=$CD_REF_SLUG
fi
echo "#### Docker image $CD_DOCKER_REPO:$CD_REF_NAME is being built"
docker build --build-arg BUILD_NUMBER="${CD_BUILD_NUMBER}" -t $CD_DOCKER_REPO:$CD_REF_NAME .
if [ -z "$CD_DOCKER_USERNAME" ] || [ -z "$CD_DOCKER_PASSWORD" ]; then
echo "#### Docker image for $CD_DOCKER_REPO can't be published because CD_DOCKER_USERNAME or CD_DOCKER_PASSWORD are missing (Ignore this warning if running outside a CD/CI environment)"
exit 0
fi
# Publish the image
docker login -u="$CD_DOCKER_USERNAME" -p="$CD_DOCKER_PASSWORD"
echo "#### Docker image $CD_DOCKER_REPO:$CD_REF_NAME is being published"
docker push $CD_DOCKER_REPO
# Publish image as latest and v2 if it is a release (excluding alpha and beta)
if [[ "$CD_REF_NAME" == *"v"* ]] && [[ "$CD_REF_NAME" != *"alpha"* ]] && [[ "$CD_REF_NAME" != *"beta"* ]]; then
docker_image_id=$(docker images | grep -E "^$CD_DOCKER_REPO.*$CD_REF_NAME" | awk -e '{print $3}')
docker tag $docker_image_id $CD_DOCKER_REPO:latest
docker push $CD_DOCKER_REPO:latest
docker tag $docker_image_id $CD_DOCKER_REPO:v2
docker push $CD_DOCKER_REPO:v2
fi
exit 0
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