[MASSEMBLY-986] Minimal default Manifest configuration of jar archiver should be respected (#134)

Author: slawekjaranowski

src/it/projects/reproducible/pom.xml

@@ -50,7 +50,7 @@
           </descriptors>
           <archive>
             <manifest>
-              <!-- remove default entries since it contains "Created-By: Maven Source Plugin <current plugin version>"
+              <!-- remove default entries since it contains "Created-By: Maven Assembly Plugin <current plugin version>"
                    which varies over time in this IT -->
               <addDefaultEntries>false</addDefaultEntries>
             </manifest>

src/it/projects/reproducible/verify.groovy

@@ -18,13 +18,20 @@
  * under the License.
  */
 
-//import java.util.zip.*
+import java.util.jar.*;
 import org.apache.commons.compress.archivers.zip.*
 
 File deployDir = new File( basedir, 'target/repo/org/apache/maven/its/reproducible/1.0' )
 
 assert deployDir.exists()
 
+// Minimal Manifest was created
+JarFile jarFile = new JarFile( new File( deployDir, "reproducible-1.0-src.jar" ) )
+Manifest mf = jarFile.getManifest()
+Attributes attrs = mf.getMainAttributes()
+assert attrs.size() == 1
+assert attrs.containsKey(Attributes.Name.MANIFEST_VERSION)
+
 ZipFile zip = new ZipFile( new File( deployDir, "reproducible-1.0-src.zip" ) )
 StringBuilder sb = new StringBuilder()
 StringBuilder sb2 = new StringBuilder()

src/it/projects/reproducible/zip-content-755.txt

@@ -28,5 +28,5 @@ executable: 100755
 
 resulting sha1:
 97d0ea3b4a87cd3ea78edd1c3c25914d69ea97f3 reproducible-1.0-src.zip.sha1
-a0c4cf1ed244e60221e12367f50ff676066b8e65 reproducible-1.0-src.jar.sha1
+d3aec46dedbfc5dcb31f7055f130860aeb8fcf66 reproducible-1.0-src.jar.sha1
 bf93dd529253157352b87097d9d23eba8c9ca61a reproducible-1.0-src.tar.sha1

src/it/projects/reproducible/zip-content-775.txt

@@ -28,5 +28,5 @@ executable: 100775
 
 resulting sha1:
 50116502c6107740c2a35ef296b5abda08c5dec7 reproducible-1.0-src.zip.sha1
-cc7e3a984179f63d6b37bc86c61e9cc461c62288 reproducible-1.0-src.jar.sha1
+3bb81a423ca18a01dd76e0f872c66a1a7528f064 reproducible-1.0-src.jar.sha1
 3efc10ec9c3099ba061e58d5b2a935ba643da237 reproducible-1.0-src.tar.sha1

src/it/projects/reproducible/zip-content-win.txt

@@ -28,5 +28,5 @@ executable: 100644
 
 resulting sha1:
 cb1dc226d702733bfa405b7090b74ab7e77bf39e reproducible-1.0-src.zip.sha1
-3b31d88a36985f526fb3fe6ba5987387e4887f23 reproducible-1.0-src.jar.sha1
+a916d0299f54a790ede766709ce54daebef5e818 reproducible-1.0-src.jar.sha1
 b85f960069d6a444f928a87761b63fde60ea687d reproducible-1.0-src.tar.sha1

src/main/java/org/apache/maven/plugins/assembly/archive/DefaultAssemblyArchiver.java

@@ -293,10 +293,7 @@ protected Archiver createArchiver(
         final List<FileSelector> extraSelectors = new ArrayList<>();
         final List<ArchiveFinalizer> extraFinalizers = new ArrayList<>();
         if (archiver instanceof JarArchiver) {
-            if (mergeManifestMode != null) {
-                ((JarArchiver) archiver)
-                        .setFilesetmanifest(JarArchiver.FilesetManifestConfig.valueOf(mergeManifestMode));
-            }
+            configureJarArchiver((JarArchiver) archiver, mergeManifestMode);
 
             extraSelectors.add(new JarSecurityFileSelector());
 
@@ -351,6 +348,15 @@ protected Archiver createArchiver(
         return archiver;
     }
 
+    private void configureJarArchiver(JarArchiver archiver, String mergeManifestMode) {
+
+        if (mergeManifestMode != null) {
+            archiver.setFilesetmanifest(JarArchiver.FilesetManifestConfig.valueOf(mergeManifestMode));
+        }
+
+        archiver.setMinimalDefaultManifest(true);
+    }
+
     private void configureContainerDescriptorHandler(
             final ContainerDescriptorHandler handler,
             final Xpp3Dom config,