Support find .sarif files recursively

src/upload-lib.ts

@@ -104,13 +104,17 @@ export async function upload(
     throw new Error(`Path does not exist: ${sarifPath}`);
   }
   if (fs.lstatSync(sarifPath).isDirectory()) {
-    const paths = fs
-      .readdirSync(sarifPath)
-      .filter((f) => f.endsWith(".sarif"))
-      .map((f) => path.resolve(sarifPath, f));
-    for (const filepath of paths) {
-      sarifFiles.push(filepath);
-    }
+    const walkSarifFiles = (dir: string) => {
+      const entries = fs.readdirSync(dir, { withFileTypes: true });
+      for (const entry of entries) {
+        if (entry.isFile() && entry.name.endsWith(".sarif")) {
+          sarifFiles.push(path.resolve(dir, entry.name));
+        } else if (entry.isDirectory()) {
+          walkSarifFiles(path.resolve(dir, entry.name));
+        }
+      }
+    };
+    walkSarifFiles(sarifPath);
     if (sarifFiles.length === 0) {
       throw new Error(`No SARIF files found to upload in "${sarifPath}".`);
     }