initial commit

external-data-source/list-rds-instances.sh

@@ -0,0 +1,3 @@
+#!/bin/bash
+RESULTS=$(aws rds describe-db-instances --query 'DBInstances[*].DBInstanceIdentifier' --output text | xargs)
+jq -n --arg result "$RESULTS" '{"result":$result}'

external-data-source/main.tf

@@ -0,0 +1,7 @@
+data external rds-instances {
+  program = ["bash", "./list-rds-instances.sh"]
+}
+
+output rds-instances {
+  value = split(" ", data.external.rds-instances.result.result)
+}