WIP - add extractor, generate snippet_data

node_modules/relay-runtime/lib/cloneRelayHandleSourceField.js

@@ -0,0 +1,37 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ *  strict-local
+ * @format
+ */
+'use strict';
+
+var _objectSpread2 = require("@babel/runtime/helpers/interopRequireDefault")(require("@babel/runtime/helpers/objectSpread"));
+
+/**
+ * @private
+ *
+ * Creates a clone of the supplied `handleField` by finding the original linked
+ * field (on which the handle was declared) among the sibling `selections`, and
+ * copying its selections into the clone.
+ */
+function cloneRelayHandleSourceField(handleField, selections, variables) {
+  var sourceField = selections.find(function (source) {
+    return source.kind === require("./RelayConcreteNode").LINKED_FIELD && source.name === handleField.name && source.alias === handleField.alias && require("fbjs/lib/areEqual")(source.args, handleField.args);
+  });
+  !(sourceField && sourceField.kind === require("./RelayConcreteNode").LINKED_FIELD) ? process.env.NODE_ENV !== "production" ? require("fbjs/lib/invariant")(false, 'cloneRelayHandleSourceField: Expected a corresponding source field for ' + 'handle `%s`.', handleField.handle) : require("fbjs/lib/invariant")(false) : void 0;
+
+  var handleKey = require("./RelayStoreUtils").getHandleStorageKey(handleField, variables);
+
+  var clonedField = (0, _objectSpread2["default"])({}, sourceField, {
+    args: null,
+    name: handleKey,
+    storageKey: handleKey
+  });
+  return clonedField;
+}
+
+module.exports = cloneRelayHandleSourceField;