Make --enable-horizon-captive-core backwards compatible

common/horizon/etc/horizon.env

@@ -12,6 +12,4 @@ export NETWORK_PASSPHRASE="__NETWORK__"
 export DISABLE_ASSET_STATS="true"
 export HISTORY_ARCHIVE_URLS="__ARCHIVE__"
 export ADMIN_PORT=6060
-export ENABLE_CAPTIVE_CORE_INGESTION=__ENABLE_CAPTIVE_CORE__
-export STELLAR_CORE_BINARY_PATH=/usr/bin/stellar-core
-export STELLAR_CORE_CONFIG_PATH=/opt/stellar/core/etc/stellar-captive-core.cfg
+

start

@@ -26,7 +26,7 @@ function main() {
 	process_args $*
 	if [ "$NETWORK" != "standalone" ] && [ "$ENABLE_HORIZON_CAPTIVE_CORE" = "true" ]; then
 	  echo "--enable-horizon-captive-core is only supported in the standalone network" >&2
-		exit 1
+	  exit 1
 	fi
 
 	echo "mode: $STELLAR_MODE"
@@ -282,9 +282,16 @@ function init_horizon() {
 		-e "s/__PGPASS__/$PGPASS/g" \
 		-e "s/__NETWORK__/$NETWORK_PASSPHRASE/g" \
 		-e "s=__ARCHIVE__=$HISTORY_ARCHIVE_URLS=g" \
-		-e "s=__ENABLE_CAPTIVE_CORE__=$ENABLE_HORIZON_CAPTIVE_CORE=g" \
 		etc/horizon.env
 
+	if [ "$ENABLE_HORIZON_CAPTIVE_CORE" = "true" ]; then
+	  cat << EOF etc/horizon.env
+export ENABLE_CAPTIVE_CORE_INGESTION=true
+export STELLAR_CORE_BINARY_PATH=/usr/bin/stellar-core
+export STELLAR_CORE_CONFIG_PATH=/opt/stellar/core/etc/stellar-captive-core.cfg
+EOF
+	fi
+
 	start_postgres
 	run_silent "init-horizon-db" sudo -u stellar ./bin/horizon db init
 	if [ "$NETWORK" == "standalone" ]; then