Get all accounts within an AWS Organizations organizational unit recursively (all accounts nested under any child OUs)

get-accounts-recursive.sh

#!/bin/bash

if [ -z "$1" ]; then
  echo "Error - Usage: $0 <parent-id>"
  exit 1
fi

set -eu
# set -x

get_accounts_recursive() {
  INDENT=$(printf '=%.0s' $(seq $2))
  aws organizations list-accounts-for-parent --parent-id "$1" | jq -r --arg INDENT "$INDENT" '.Accounts[] | "\($INDENT) \(.Name) (\(.Id))"' | sort
  for ou in $(aws organizations list-organizational-units-for-parent --parent-id "$1" --output text --query 'OrganizationalUnits[][Id]'); do
    echo ""
    aws organizations describe-organizational-unit --organizational-unit-id "$ou" | jq -r --arg INDENT "$INDENT" '.OrganizationalUnit | "\($INDENT) \(.Name) (\(.Id))"'
    get_accounts_recursive "$ou" "$(( $2 + 1 ))"
    INDENT=$(printf '=%.0s' $(seq $2))
  done
}

aws organizations list-roots | jq -r '.Roots[0] | "\(.Name) (\(.Id))"'

get_accounts_recursive "$1" "1"