fix(manager/gradle): only accept known format for optional classifiers (#18525)

lib/modules/manager/gradle/utils.spec.ts

@@ -39,12 +39,14 @@ describe('modules/manager/gradle/utils', () => {
     expect(isDependencyString('foo.foo:bar.bar:1.2.3')).toBeTrue();
     expect(isDependencyString('foo:bar:baz:qux')).toBeTrue();
     expect(isDependencyString('foo.bar:baz:1.2.3')).toBeTrue();
+    expect(isDependencyString('foo.bar:baz:1.2.3:linux-cpu-x86_64')).toBeTrue();
     expect(isDependencyString('foo.bar:baz:1.2.+')).toBeTrue();
     expect(isDependencyString('foo:bar:baz:qux:quux')).toBeFalse();
     expect(isDependencyString("foo:bar:1.2.3'")).toBeFalse();
     expect(isDependencyString('foo:bar:1.2.3"')).toBeFalse();
     expect(isDependencyString('-Xep:ParameterName:OFF')).toBeFalse();
     expect(isDependencyString('foo$bar:baz:1.2.+')).toBeFalse();
+    expect(isDependencyString('scm:git:https://some.git')).toBeFalse();
   });
 
   it('parseDependencyString', () => {

lib/modules/manager/gradle/utils.ts

@@ -30,7 +30,13 @@ export function isDependencyString(input: string): boolean {
     return false;
   }
   // eslint-disable-next-line prefer-const
-  let [tempGroupId, tempArtifactId, tempVersionPart] = split;
+  let [tempGroupId, tempArtifactId, tempVersionPart, optionalClassifier] =
+    split;
+
+  if (optionalClassifier && !artifactRegex.test(optionalClassifier)) {
+    return false;
+  }
+
   if (
     tempVersionPart !== versionLikeSubstring(tempVersionPart) &&
     tempVersionPart.includes('@')