From a1d06d3f70b94b4852fad9e3fc5acbeeac2b0999 Mon Sep 17 00:00:00 2001
From: mainframev <vgenaev@gmail.com>
Date: Mon, 30 Jun 2025 16:45:05 +0200
Subject: [PATCH] fix(eslint-plugin): add support of exports/reexports to
 no-deprecated rule

---
 .../eslint-plugin/src/rules/no-deprecated.ts  | 20 ++++--
 .../tests/fixtures/deprecated.ts              |  5 ++
 .../tests/rules/no-deprecated.test.ts         | 64 +++++++++++++++++++
 3 files changed, 84 insertions(+), 5 deletions(-)

diff --git a/packages/eslint-plugin/src/rules/no-deprecated.ts b/packages/eslint-plugin/src/rules/no-deprecated.ts
index 725ddaf3fce9..eb12b788e926 100644
--- a/packages/eslint-plugin/src/rules/no-deprecated.ts
+++ b/packages/eslint-plugin/src/rules/no-deprecated.ts
@@ -161,13 +161,11 @@ export default createRule<Options, MessageIds>({
       }
     }
 
-    function isInsideExportOrImport(node: TSESTree.Node): boolean {
+    function isInsideImport(node: TSESTree.Node): boolean {
       let current = node;
 
       while (true) {
         switch (current.type) {
-          case AST_NODE_TYPES.ExportAllDeclaration:
-          case AST_NODE_TYPES.ExportNamedDeclaration:
           case AST_NODE_TYPES.ImportDeclaration:
             return true;
 
@@ -178,6 +176,7 @@ export default createRule<Options, MessageIds>({
           case AST_NODE_TYPES.FunctionDeclaration:
           case AST_NODE_TYPES.FunctionExpression:
           case AST_NODE_TYPES.Program:
+          case AST_NODE_TYPES.ExportSpecifier:
           case AST_NODE_TYPES.TSUnionType:
           case AST_NODE_TYPES.VariableDeclarator:
             return false;
@@ -365,7 +364,7 @@ export default createRule<Options, MessageIds>({
     }
 
     function checkIdentifier(node: IdentifierLike): void {
-      if (isDeclaration(node) || isInsideExportOrImport(node)) {
+      if (isDeclaration(node) || isInsideImport(node)) {
         return;
       }
 
@@ -436,7 +435,18 @@ export default createRule<Options, MessageIds>({
     }
 
     return {
-      Identifier: checkIdentifier,
+      ExportSpecifier(node): void {
+        const symbol = services.getSymbolAtLocation(node.exported);
+
+        if (searchForDeprecationInAliasesChain(symbol, false) == null) {
+          checkIdentifier(node.exported as TSESTree.Identifier);
+        }
+      },
+      Identifier(node): void {
+        if (node.parent.type !== AST_NODE_TYPES.ExportSpecifier) {
+          checkIdentifier(node);
+        }
+      },
       JSXIdentifier(node): void {
         if (node.parent.type !== AST_NODE_TYPES.JSXClosingElement) {
           checkIdentifier(node);
diff --git a/packages/eslint-plugin/tests/fixtures/deprecated.ts b/packages/eslint-plugin/tests/fixtures/deprecated.ts
index 2302eabd3f54..b8dc49fcf16d 100644
--- a/packages/eslint-plugin/tests/fixtures/deprecated.ts
+++ b/packages/eslint-plugin/tests/fixtures/deprecated.ts
@@ -36,6 +36,11 @@ export {
   ClassWithDeprecatedConstructor as ReexportedClassWithDeprecatedConstructor,
 };
 
+/** @deprecated Reason */
+export type T = { a: string };
+
+export type U = { b: string };
+
 /** @deprecated */
 export default {
   foo: 1,
diff --git a/packages/eslint-plugin/tests/rules/no-deprecated.test.ts b/packages/eslint-plugin/tests/rules/no-deprecated.test.ts
index 1c8f354886df..ecb14cc817f0 100644
--- a/packages/eslint-plugin/tests/rules/no-deprecated.test.ts
+++ b/packages/eslint-plugin/tests/rules/no-deprecated.test.ts
@@ -329,6 +329,12 @@ ruleTester.run('no-deprecated', rule, {
       }
       <foo bar={1} />;
     `,
+    `
+      export {
+        /** @deprecated */
+        foo,
+      };
+    `,
     {
       code: `
 /** @deprecated */
@@ -3173,5 +3179,63 @@ class B extends A {
         },
       ],
     },
+    {
+      code: `
+        import { deprecatedFunction } from './deprecated';
+
+        export { deprecatedFunction };
+      `,
+      errors: [
+        {
+          column: 18,
+          endColumn: 36,
+          endLine: 4,
+          line: 4,
+          messageId: 'deprecated',
+        },
+      ],
+    },
+    {
+      code: `
+        export { deprecatedFunction } from './deprecated';
+      `,
+      errors: [
+        {
+          column: 18,
+          endColumn: 36,
+          endLine: 2,
+          line: 2,
+          messageId: 'deprecated',
+        },
+      ],
+    },
+    {
+      code: `
+        export type { T, U } from './deprecated';
+      `,
+      errors: [
+        {
+          column: 23,
+          endColumn: 24,
+          endLine: 2,
+          line: 2,
+          messageId: 'deprecatedWithReason',
+        },
+      ],
+    },
+    {
+      code: `
+        export { default as foo } from './deprecated';
+      `,
+      errors: [
+        {
+          column: 29,
+          endColumn: 32,
+          endLine: 2,
+          line: 2,
+          messageId: 'deprecated',
+        },
+      ],
+    },
   ],
 });