From 3c194f7c1e753104b4b1f43c35c01d011df6d246 Mon Sep 17 00:00:00 2001
From: Michael Kriese <michael.kriese@visualon.de>
Date: Tue, 7 Jan 2025 15:16:17 +0100
Subject: [PATCH] fix(datasource/docker): handle empty `newValue` in
 `getDigest`

---
 lib/modules/datasource/docker/index.spec.ts | 11 +++++++----
 lib/modules/datasource/docker/index.ts      |  2 +-
 2 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/lib/modules/datasource/docker/index.spec.ts b/lib/modules/datasource/docker/index.spec.ts
index 68096768f24baf..768dacc88d61b4 100644
--- a/lib/modules/datasource/docker/index.spec.ts
+++ b/lib/modules/datasource/docker/index.spec.ts
@@ -98,10 +98,13 @@ describe('modules/datasource/docker/index', () => {
         .reply(200, { token: 'some-token' });
 
       hostRules.find.mockReturnValue({});
-      const res = await getDigest({
-        datasource: 'docker',
-        packageName: 'some-dep',
-      });
+      const res = await getDigest(
+        {
+          datasource: 'docker',
+          packageName: 'some-dep',
+        },
+        '',
+      );
       expect(res).toBe('some-digest');
     });
 
diff --git a/lib/modules/datasource/docker/index.ts b/lib/modules/datasource/docker/index.ts
index b6082a6455ef31..3e4339d0fa2b25 100644
--- a/lib/modules/datasource/docker/index.ts
+++ b/lib/modules/datasource/docker/index.ts
@@ -831,7 +831,7 @@ export class DockerDatasource extends Datasource {
       // TODO: types (#22198)
       `getDigest(${registryHost}, ${dockerRepository}, ${newValue})`,
     );
-    const newTag = newValue ?? 'latest';
+    const newTag = is.nonEmptyString(newValue) ? newValue : 'latest';
     let digest: string | null = null;
     try {
       let architecture: string | null | undefined = null;