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#!/bin/bash
set -e
DOCKERFILE_PATH=$1
if [ "${DOCKERFILE_PATH}" = "" ]; then
echo "usage: $0 dockerfile"
exit 1
fi
if [ "${DOCKER_REGISTRY}" = "" ]; then
echo "DOCKER_REGISTRY environment variable is unset."
echo "Not running inside GitHub Actions or misconfigured?"
exit 1
fi
DOCKER_CONTAINER="${GITHUB_REPOSITORY}/$(basename ${DOCKERFILE_PATH})"
DOCKER_REGISTRY_CONTAINER="${DOCKER_REGISTRY}/${DOCKER_CONTAINER}"
echo "::set-env name=docker-container::${DOCKER_CONTAINER}"
echo "::set-env name=docker-registry-container::${DOCKER_REGISTRY_CONTAINER}"
# Identify the last git commit that touched the Dockerfiles
# Use this as a hash to identify the resulting docker containers
DOCKER_SHA=$(git log -1 --pretty=format:"%h" -- "${DOCKERFILE_PATH}")
echo "::set-env name=docker-sha::${DOCKER_SHA}"
DOCKER_REGISTRY_CONTAINER_SHA="${DOCKER_REGISTRY_CONTAINER}:${DOCKER_SHA}"
echo "::set-env name=docker-registry-container-sha::${DOCKER_REGISTRY_CONTAINER_SHA}"
echo "::set-env name=docker-registry-container-latest::${DOCKER_REGISTRY_CONTAINER}:latest"
exists="true"
docker login https://${DOCKER_REGISTRY} -u ${GITHUB_ACTOR} -p ${GITHUB_TOKEN} || exists="false"
if [ "${exists}" != "false" ]; then
docker pull ${DOCKER_REGISTRY_CONTAINER_SHA} || exists="false"
fi
if [ "${exists}" = "true" ]; then
echo "::set-env name=docker-container-exists::true"
else
echo "::set-env name=docker-container-exists::false"
fi
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