Clean up old AWS Lambda Functions

clean_up_lambda.sh

function run() {
    LAMBDA_FUNCTION=$1;
    LAMBDA_VERSIONS_DATA=$(aws lambda list-versions-by-function --function-name $LAMBDA_FUNCTION);
    LAMBDA_VERSIONS=$(echo $LAMBDA_VERSIONS_DATA | jq -r '.Versions | map(select(.Version != "$LATEST")) | map(.Version | tonumber)');
    LAMBDA_VERSION_LATEST=$(echo $LAMBDA_VERSIONS | jq  -r 'sort | .[-1:][0]');
    echo "Latest Version: $LAMBDA_VERSION_LATEST";
    LAMBDA_VERSIONS_ARR=($(echo $LAMBDA_VERSIONS | jq -r 'join(" ")'));
    for version in "${LAMBDA_VERSIONS_ARR[@]}"; do
    if (( version < LAMBDA_VERSION_LATEST )); then
        echo "Removing old Version: $version";
        echo "aws lambda delete-function --function-name $LAMBDA_FUNCTION:$version";
        aws lambda delete-function --function-name $LAMBDA_FUNCTION:$version;
    fi
    done
}

run $1

> chmod +x ./clean_up_lambda.sh 
> ./clean_up_lambda.sh my_func

Requires jq