Check if an image exists and built it if not

check-image-build-it-if-needed.sh

function docker_tag_exists() {
    if [[ $# -lt 2 ]]; then
        echo "Usage: $( basename $0 ) <repository-name> <image-tag>"
        exit 1
    fi

    IMAGE_META="$( aws ecr describe-images --repository-name=$1 --image-ids=imageTag=$2 2> /dev/null )"

    if [[ $? == 0 ]]; then
        echo $IMAGE_META
        IMAGE_TAGS="$( echo ${IMAGE_META} | jq '.imageDetails[0].imageTags[0]' -r )"
        echo "$1:$2 found"
        return 0        
    else
        echo "$1:$2 not found"
        return 1
    fi
}

echo "---- First querying ECR to see if the image already exist"

if docker_tag_exists $(ENV_APP_NAME) $(Build.BuildId)-$(Build.SourceVersion); then
    echo "---- It exists!"
    echo "##vso[task.setvariable variable=create_release;]0"
else
    echo "---- Does not exist!"
    cd $(Release.PrimaryArtifactSourceAlias)/drop
    chmod +x *.sh
    $(aws ecr get-login --no-include-email)
    docker build -t $(ENV_APP_NAME) .
    docker tag $(ENV_APP_NAME):latest $(AWS_MAIN_ECR)/$(ENV_APP_NAME):latest
    docker tag $(ENV_APP_NAME):latest $(AWS_MAIN_ECR)/$(ENV_APP_NAME):$(Build.BuildId)-$(Build.SourceVersion)
    docker tag $(ENV_APP_NAME):latest $(AWS_MAIN_ECR)/$(ENV_APP_NAME):$(ENV_TAG_VERSION)
    docker push $(AWS_MAIN_ECR)/$(ENV_APP_NAME)
    echo "##vso[task.setvariable variable=create_release;]1"
fi