Script to merge source terraform state into destination state

merge-terraform-state.sh

#!/bin/bash

SOURCE=$1
DESTINATION=$2
if [ -z "${SOURCE}" ] || [ -z "${DESTINATION}" ]; then
    echo "=== source and destination are required"
    echo "Usage: $0 source destination"
    exit 1
fi;

pushd "${DESTINATION}" > /dev/null

DESTINATION_ABSOLUTE_PATH=$(pwd)
rm -f ./state.tfstate && terraform state pull > state.tfstate

popd > /dev/null

pushd "${SOURCE}" > /dev/null

SOURCE_ABSOLUTE_PATH=$(pwd)
rm -f ./state.tfstate && terraform state pull > state.tfstate

RESOURCES=( $(cat state.tfstate | jq -r '.resources[] | "\(.type).\(.name)"') )

for resource in "${RESOURCES[@]}"
do
    terraform state mv -state-out=${DESTINATION_ABSOLUTE_PATH}/state.tfstate $resource $resource
done;