Checks if configuration parameters are set.

libs/flow

@@ -4,6 +4,9 @@ function fma::flow::preflight_checks() {
     echo
     echo "Pre-flight checks"
 
+    echo "› checking configuration"
+    fma::flow::check_configuration
+
     echo "› checking interface ${affected_interface}"
     fma::network::interface_exists "${affected_interface}"
 
@@ -28,4 +31,14 @@ function fma::flow::fake_mac_address() {
     fma::network::check_mac_address_after "${affected_interface}" "${fake_mac_address}"
 }
 
+function fma::flow::check_configuration() {
+    if [[ -z "${affected_interface+x}" ]]; then
+        fma::utils::terminate "Configuration parametr [affected_interface] is not set."
+    fi
+
+    if [[ -z "${fake_mac_address+x}" ]]; then
+        fma::utils::terminate "Configuration parametr [fake_mac_address] is not set."
+    fi
 
+    fma::utils::success "Configuration is set."
+}