From b431d65099233e78ce19cde5f963aadc51ff2da9 Mon Sep 17 00:00:00 2001
From: Harald Fernengel <harald.fernengel@here.com>
Date: Wed, 22 Apr 2020 14:24:42 +0200
Subject: [PATCH] Make "Index" a reserved word (#6000)

Some APIs have a model called "Index" which would create a file
"Index.ts" which would override "index.ts" on case-insensitive file
systems (e.g. macOS, some Windows versions). Make "Index" a reserved
word to prevent this clash.
---
 docs/generators/typescript-fetch.md                            | 1 +
 .../codegen/languages/TypeScriptFetchClientCodegen.java        | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/docs/generators/typescript-fetch.md b/docs/generators/typescript-fetch.md
index af3dd916268..40e7ff4eb2c 100644
--- a/docs/generators/typescript-fetch.md
+++ b/docs/generators/typescript-fetch.md
@@ -76,6 +76,7 @@ sidebar_label: typescript-fetch
 <li>HTTPHeaders</li>
 <li>HTTPMethod</li>
 <li>HTTPQuery</li>
+<li>Index</li>
 <li>JSONApiResponse</li>
 <li>Middleware</li>
 <li>ModelPropertyNaming</li>
diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptFetchClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptFetchClientCodegen.java
index a2f03cfdd3f..38b3f71ac6c 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptFetchClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/TypeScriptFetchClientCodegen.java
@@ -327,6 +327,9 @@ public class TypeScriptFetchClientCodegen extends AbstractTypeScriptClientCodege
         this.reservedWords.add("VoidApiResponse");
         this.reservedWords.add("BlobApiResponse");
         this.reservedWords.add("TextApiResponse");
+        // "Index" would create a file "Index.ts" which on case insensitive filesystems
+        // would override our "index.js" file
+        this.reservedWords.add("Index");
     }
 
     private boolean getUseSingleRequestParameter() {