1 files changed, 71 insertions, 0 deletions
diff --git a/tools/node_modules/eslint/node_modules/@babel/core/lib/config/validation/plugins.js b/tools/node_modules/eslint/node_modules/@babel/core/lib/config/validation/plugins.js
new file mode 100644
index 0000000000..a70cc676fa
--- /dev/null
+++ b/tools/node_modules/eslint/node_modules/@babel/core/lib/config/validation/plugins.js
@@ -0,0 +1,71 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.validatePluginObject = validatePluginObject;
+
+var _optionAssertions = require("./option-assertions");
+
+const VALIDATORS = {
+  name: _optionAssertions.assertString,
+  manipulateOptions: _optionAssertions.assertFunction,
+  pre: _optionAssertions.assertFunction,
+  post: _optionAssertions.assertFunction,
+  inherits: _optionAssertions.assertFunction,
+  visitor: assertVisitorMap,
+  parserOverride: _optionAssertions.assertFunction,
+  generatorOverride: _optionAssertions.assertFunction
+};
+
+function assertVisitorMap(loc, value) {
+  const obj = (0, _optionAssertions.assertObject)(loc, value);
+
+  if (obj) {
+    Object.keys(obj).forEach(prop => assertVisitorHandler(prop, obj[prop]));
+
+    if (obj.enter || obj.exit) {
+      throw new Error(`${(0, _optionAssertions.msg)(loc)} cannot contain catch-all "enter" or "exit" handlers. Please target individual nodes.`);
+    }
+  }
+
+  return obj;
+}
+
+function assertVisitorHandler(key, value) {
+  if (value && typeof value === "object") {
+    Object.keys(value).forEach(handler => {
+      if (handler !== "enter" && handler !== "exit") {
+        throw new Error(`.visitor["${key}"] may only have .enter and/or .exit handlers.`);
+      }
+    });
+  } else if (typeof value !== "function") {
+    throw new Error(`.visitor["${key}"] must be a function`);
+  }
+
+  return value;
+}
+
+function validatePluginObject(obj) {
+  const rootPath = {
+    type: "root",
+    source: "plugin"
+  };
+  Object.keys(obj).forEach(key => {
+    const validator = VALIDATORS[key];
+
+    if (validator) {
+      const optLoc = {
+        type: "option",
+        name: key,
+        parent: rootPath
+      };
+      validator(optLoc, obj[key]);
+    } else {
+      const invalidPluginPropertyError = new Error(`.${key} is not a valid Plugin property`);
+      invalidPluginPropertyError.code = "BABEL_UNKNOWN_PLUGIN_PROPERTY";
+      throw invalidPluginPropertyError;
+    }
+  });
+  return obj;
+}
+\ No newline at end of file