aws-ec2-ip

#!/usr/bin/env bash

command_exists() {
  type "${1}" >/dev/null 2>&1
}

ensure_command() {
  if ! command_exists "${1}"; then
    echo "command not found: ${1}"
    exit 1
  fi
}

aws_ec2_ip() {
  local -r ec2_name="${1}"
  local -r filter="Name=tag:Name,Values=*${ec2_name}*"
  local -r query='Reservations[*].Instances[*].{Id:InstanceId,Ip:PrivateIpAddress,Name:Tags[?Key==`Name`]|[0].Value}'
  local -r items="$(aws ec2 describe-instances --filters "${filter}" --output json --query "${query}" | jq 'flatten')"
  local -r selected_name=$(echo "${items}" | jq -r 'map(.Name) | .[]' | fzf --header "Select EC2 Name")
  local -r selected_ip=$(echo "${items}" | jq -r --arg name "${selected_name}" 'map(select(.Name == $name))[0].Ip' )
  if [[ "${selected_ip}" = "null" ]]; then
    exit 1
  fi
  echo "${selected_ip}"
}

ensure_command aws
ensure_command fzf
ensure_command jq

aws_ec2_ip $@