Ignore .git store on Template uploads for editor and increase payload size to 10MB (fixes #12561)

Signed-off-by: Axel Hecht <axel@pike.org>

.changeset/wild-weeks-live.md

@@ -0,0 +1,6 @@
+---
+'@backstage/plugin-scaffolder': patch
+'@backstage/plugin-scaffolder-backend': patch
+---
+
+Ignore .git directories in Template Editor, increase upload limit for dry-runs to 10MB.

plugins/scaffolder-backend/src/service/router.ts

@@ -148,7 +148,8 @@ export async function createRouter(
   options: RouterOptions,
 ): Promise<express.Router> {
   const router = Router();
-  router.use(express.json());
+  // Be generous in upload size to support a wide rande of templates in dry-run mode.
+  router.use(express.json({ limit: '10MB' }));
 
   const {
     logger: parentLogger,

plugins/scaffolder/src/lib/filesystem/WebFileSystemAccess.ts

@@ -71,6 +71,10 @@ class WebDirectoryAccess implements TemplateDirectoryAccess {
       if (handle.kind === 'file') {
         yield new WebFileAccess([...basePath, handle.name].join('/'), handle);
       } else if (handle.kind === 'directory') {
+        // Skip git storage directory
+        if (handle.name === '.git') {
+          continue;
+        }
         yield* this.listDirectoryContents(handle, [...basePath, handle.name]);
       }
     }