From fbc3ba8db27fd19ace2b99b1414d970f3c3bdde6 Mon Sep 17 00:00:00 2001
From: Sebastian Tiemann <sepanse@gmail.com>
Date: Tue, 15 Oct 2024 12:01:43 +0200
Subject: [PATCH] feat(manager/maven): provide warning log if pom contains
 windows line ending (#31858)

Co-authored-by: Sebastian Panse <sebastian.panse@codecentric.de>
Co-authored-by: Rhys Arkins <rhys@arkins.net>
---
 lib/modules/manager/maven/extract.spec.ts | 12 ++++++++++++
 lib/modules/manager/maven/extract.ts      |  5 +++++
 2 files changed, 17 insertions(+)

diff --git a/lib/modules/manager/maven/extract.spec.ts b/lib/modules/manager/maven/extract.spec.ts
index d6689de4238d70..3efc9d99aea9fa 100644
--- a/lib/modules/manager/maven/extract.spec.ts
+++ b/lib/modules/manager/maven/extract.spec.ts
@@ -1,6 +1,7 @@
 import { codeBlock } from 'common-tags';
 import { Fixtures } from '../../../../test/fixtures';
 import { fs } from '../../../../test/util';
+import { logger } from '../../../logger';
 import {
   extractAllPackageFiles,
   extractExtensions,
@@ -234,6 +235,17 @@ describe('modules/manager/maven/extract', () => {
       });
     });
 
+    it('extract dependencies with windows line endings', () => {
+      const logSpy = jest.spyOn(logger, 'warn');
+      extractPackage(
+        '<?xml version="1.0" encoding="UTF-8"?> \r\n',
+        'some-file',
+      );
+      expect(logSpy).toHaveBeenCalledWith(
+        'Your pom.xml contains windows line endings. This is not supported and may result in parsing issues.',
+      );
+    });
+
     it('tries minimum manifests', () => {
       const res = extractPackage(Fixtures.get('minimum.pom.xml'), 'some-file');
       expect(res).toEqual({
diff --git a/lib/modules/manager/maven/extract.ts b/lib/modules/manager/maven/extract.ts
index a46e485252dd27..ef06fe3911228c 100644
--- a/lib/modules/manager/maven/extract.ts
+++ b/lib/modules/manager/maven/extract.ts
@@ -26,6 +26,11 @@ function parsePom(raw: string, packageFile: string): XmlDocument | null {
   let project: XmlDocument;
   try {
     project = new XmlDocument(raw);
+    if (raw.includes('\r\n')) {
+      logger.warn(
+        'Your pom.xml contains windows line endings. This is not supported and may result in parsing issues.',
+      );
+    }
   } catch {
     logger.debug({ packageFile }, `Failed to parse as XML`);
     return null;