ec2 instances to ansible inventory using jq

ec2ansibleinv.sh

 #!/bin/bash
 STACK=$1

 aws ec2 describe-instances | jq -r \
  '[
      .Reservations[].Instances[]
      | . as $node
      | {
          ip: ($node.NetworkInterfaces[0].PrivateIpAddress),
          name: ($node.Tags[] | select(.Key == "Name").Value),
          group: ($node.Tags[] | select(.Key == "Group").Value),
          stack: ($node.Tags[] | select(.Key == "Stack").Value)
        }
      | select( .stack == "'"$STACK"'")
   ]
   | group_by( .group)
   | map ({group:.[0].group, nodes:([.[]|"\(.name) ansible_host=\(.ip)"]|join("\n"))})
   | .[] | "[\(.group)]","\(.nodes)"'