fix(maven): ignore artifacts which contain no POM/BOM

src/targets/__tests__/maven.test.ts

@@ -371,6 +371,7 @@ describe('upload', () => {
       .fn()
       .mockResolvedValueOnce('artifact/download/path');
     mvnTarget.isBomFile = jest.fn().mockResolvedValueOnce(false);
+    mvnTarget.getPomFileInDist = jest.fn().mockResolvedValueOnce('pom-default.xml');
 
     await mvnTarget.upload('r3v1s10n');
 
@@ -420,6 +421,7 @@ describe('upload', () => {
       .fn()
       .mockResolvedValueOnce('artifact/download/path');
     mvnTarget.isBomFile = jest.fn().mockResolvedValueOnce('path/to/bomfile');
+    mvnTarget.getPomFileInDist = jest.fn().mockResolvedValueOnce(undefined);
 
     await mvnTarget.upload('r3v1s10n');
 
@@ -446,6 +448,32 @@ describe('upload', () => {
     expect(cmdArgs[6]).toBe('--settings');
     expect(cmdArgs[7]).toBe(DEFAULT_OPTION_VALUE);
   });
+
+  test('should skip upload for artifacts without any POM/BOM', async () => {
+    // simple mock to always use the same temporary directory,
+    // instead of creating a new one
+    (withTempDir as jest.MockedFunction<typeof withTempDir>).mockImplementation(
+      async cb => {
+        return await cb(tmpDirName);
+      }
+    );
+
+    const mvnTarget = createMavenTarget();
+
+    mvnTarget.getArtifactsForRevision = jest
+      .fn()
+      .mockResolvedValueOnce([{ filename: 'mockArtifact.zip' }]);
+    mvnTarget.artifactProvider.downloadArtifact = jest
+      .fn()
+      .mockResolvedValueOnce('artifact/download/path');
+
+    mvnTarget.isBomFile = jest.fn().mockResolvedValueOnce(false);
+    mvnTarget.getPomFileInDist = jest.fn().mockResolvedValueOnce(undefined);
+
+    await mvnTarget.upload('r3v1s10n');
+
+    expect(retrySpawnProcess).toHaveBeenCalledTimes(0);
+  });
 });
 
 describe('closeAndReleaseRepository', () => {

src/targets/maven.ts

@@ -288,11 +288,16 @@ export class MavenTarget extends BaseTarget {
    */
   private async uploadDistribution(distDir: string): Promise<void> {
     const bomFile = await this.getBomFileInDist(distDir);
+    const pomFile = await this.getPomFileInDist(distDir);
+
     if (bomFile) {
       this.logger.debug('Found BOM: ', bomFile);
       await this.uploadBomDistribution(bomFile);
-    } else {
+    } else if (pomFile) {
+      this.logger.debug('Found POM: ', pomFile);
       await this.uploadPomDistribution(distDir);
+    } else {
+      this.logger.warn(`No BOM/POM file found in: ${distDir}, skipping directory`);
     }
   }
 
@@ -341,7 +346,7 @@ export class MavenTarget extends BaseTarget {
     } catch (error) {
       this.logger.warn(
         `Could not determine if path corresponds to a BOM file: ${pomFilepath}\n` +
-          'Error:\n',
+        'Error:\n',
         error
       );
       return false;
@@ -475,6 +480,23 @@ export class MavenTarget extends BaseTarget {
     };
   }
 
+  /**
+   * Returns a file path to pom-default.xml if the file exists
+   * within the distribution directory.
+   */
+  public async getPomFileInDist(distDir: string): Promise<string | undefined> {
+    const pomFilepath = join(distDir, 'pom-default.xml');
+    try {
+      const stat = await fsPromises.stat(pomFilepath);
+      if (stat.isFile()) {
+        return pomFilepath;
+      }
+    } catch (e) {
+      // ignored
+    }
+    return undefined;
+  }
+
   private async uploadPomDistribution(distDir: string): Promise<void> {
     if (this.mavenConfig.kmp !== false) {
       await this.uploadKmpPomDistribution(distDir);