add some packages

node_modules/babel-helper-mark-eval-scopes/lib/index.js

@@ -0,0 +1,53 @@
+"use strict";
+
+const EVAL_SCOPE_MARKER = Symbol("evalInScope");
+module.exports = {
+  EVAL_SCOPE_MARKER,
+  getEvalScopes,
+  markEvalScopes,
+  isMarked,
+  hasEval
+};
+
+function getEvalScopes(path) {
+  const evalScopes = new Set();
+
+  function add(scope) {
+    let evalScope = scope;
+
+    do {
+      evalScopes.add(evalScope);
+    } while (evalScope = evalScope.parent);
+  }
+
+  path.traverse({
+    CallExpression(evalPath) {
+      const callee = evalPath.get("callee");
+
+      if (callee.isIdentifier() && callee.node.name === "eval" && !callee.scope.getBinding("eval")) {
+        add(callee.scope);
+      }
+    }
+
+  });
+  return evalScopes;
+}
+
+function markEvalScopes(path, key = EVAL_SCOPE_MARKER) {
+  const evalScopes = getEvalScopes(path);
+  [...evalScopes].forEach(scope => {
+    scope[key] = true;
+  });
+}
+
+function isMarked(scope, key = EVAL_SCOPE_MARKER) {
+  return Object.prototype.hasOwnProperty.call(scope, key);
+}
+
+function hasEval(scope, key = EVAL_SCOPE_MARKER) {
+  if (!isMarked(scope, key)) {
+    markEvalScopes(scope, key);
+  }
+
+  return scope[key];
+}