From 4f2bcdc7b7fab0ae1a11f5a189ba10fd232ac57a Mon Sep 17 00:00:00 2001
From: Alan Agius <17563226+alan-agius4@users.noreply.github.com>
Date: Tue, 4 Mar 2025 15:36:18 +0000
Subject: [PATCH] fix(@schematics/angular): prevent error when tsconfig file is
 missing in application builder migration

If the root tsconfig.json is missing we should not error.

Closes #29754
---
 .../migrations/use-application-builder/migration.ts       | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/packages/schematics/angular/migrations/use-application-builder/migration.ts b/packages/schematics/angular/migrations/use-application-builder/migration.ts
index 1ca18961084b..464f6b4bf560 100644
--- a/packages/schematics/angular/migrations/use-application-builder/migration.ts
+++ b/packages/schematics/angular/migrations/use-application-builder/migration.ts
@@ -460,8 +460,12 @@ function deleteFile(path: string): Rule {
 }
 
 function updateJsonFile(path: string, updater: (json: JSONFile) => void): Rule {
-  return (tree) => {
-    updater(new JSONFile(tree, path));
+  return (tree, ctx) => {
+    if (tree.exists(path)) {
+      updater(new JSONFile(tree, path));
+    } else {
+      ctx.logger.info(`Skipping updating '${path}' as it does not exist.`);
+    }
   };
 }