fix(gradle): throw registry failure if lookup fails

lib/manager/gradle/index.js

@@ -26,10 +26,7 @@ async function extractAllPackageFiles(config, packageFiles) {
   }
 
   await configureUseLatestVersionPlugin(config.localDir);
-  const gradleSuccess = await executeGradle(config);
-  if (!gradleSuccess) {
-    return null;
-  }
+  await executeGradle(config);
 
   gradle.init();
   const gradleFiles = [];
@@ -171,11 +168,11 @@ async function executeGradle(config) {
       logger.error(' Process killed. Possibly gradle timed out.');
     }
     logger.warn({ err }, errorStr);
-    return false;
+    logger.info('Aborting Renovate due to Gradle lookup errors');
+    throw new Error('registry-failure');
   }
   logger.debug(stdout + stderr);
   logger.info('Gradle report complete');
-  return true;
 }
 
 function getDockerRenovateGradleCommandLine(localDir) {

test/manager/gradle/__snapshots__/index.spec.js.snap

@@ -79,3 +79,5 @@ Array [
   },
 ]
 `;
+
+exports[`manager/gradle extractPackageFile should throw registry failure if gradle execution fails 1`] = `[Error: registry-failure]`;

test/manager/gradle/index.spec.js

@@ -52,15 +52,17 @@ describe('manager/gradle', () => {
       expect(dependencies).toEqual([]);
     });
 
-    it('should return null if gradle execution fails', async () => {
+    it('should throw registry failure if gradle execution fails', async () => {
       exec.mockImplementation(() => {
         throw new Error();
       });
-
-      const dependencies = await manager.extractAllPackageFiles(config, [
-        'build.gradle',
-      ]);
-      expect(dependencies).toEqual(null);
+      let e;
+      try {
+        await manager.extractAllPackageFiles(config, ['build.gradle']);
+      } catch (err) {
+        e = err;
+      }
+      expect(e).toMatchSnapshot();
     });
 
     it('should return empty if there is no dependency report', async () => {