- s#__COMPUTE_AMI__#${COMPUTE_AMI}#g;
- s#__COMPUTE_SG__#${COMPUTE_SG}#g;
- s#__COMPUTE_SUBNET__#${COMPUTE_SUBNET}#g;
- s#__COMPUTE_AWS_REGION__#${COMPUTE_AWS_REGION}#g;
- s#__COMPUTE_USER__#${COMPUTE_USER}#g;
- s#__KEEP_AWS_REGION__#${KEEP_AWS_REGION}#g" \
+ s#__COMPUTE_AMI__#${COMPUTE_AMI:-}#g;
+ s#__COMPUTE_SG__#${COMPUTE_SG:-}#g;
+ s#__COMPUTE_SUBNET__#${COMPUTE_SUBNET:-}#g;
+ s#__COMPUTE_AWS_REGION__#${COMPUTE_AWS_REGION:-}#g;
+ s#__COMPUTE_USER__#${COMPUTE_USER:-}#g;
+ s#__KEEP_AWS_S3_BUCKET__#${KEEP_AWS_S3_BUCKET:-}#g;
+ s#__KEEP_AWS_IAM_ROLE__#${KEEP_AWS_IAM_ROLE:-}#g;
+ s#__KEEP_AWS_REGION__#${KEEP_AWS_REGION:-}#g" \