add umask support and use 022 in RB mode

pom.xml

@@ -10,7 +10,7 @@
   </parent>
 
   <artifactId>plexus-archiver</artifactId>
-  <version>4.6.4-SNAPSHOT</version>
+  <version>4.7.0-SNAPSHOT</version>
   <name>Plexus Archiver Component</name>
 
   <scm>

src/main/java/org/codehaus/plexus/archiver/AbstractArchiver.java

@@ -89,6 +89,8 @@ protected Logger getLogger()
 
     private int defaultDirectoryMode = -1; // Optionally used if a value is needed
 
+    private int umask = -1;
+
     private boolean forced = true;
 
     private List<ArchiveFinalizer> finalizers;
@@ -440,14 +442,19 @@ private ArchiveEntry updateArchiveEntryAttributes( ArchiveEntry entry )
     }
 
     protected ArchiveEntry asArchiveEntry( @Nonnull final PlexusIoResource resource, final String destFileName,
-                                           final int permissions, PlexusIoResourceCollection collection )
+                                           int permissions, PlexusIoResourceCollection collection )
         throws ArchiverException
     {
         if ( !resource.isExisting() )
         {
             throw new ArchiverException( resource.getName() + " not found." );
         }
 
+        if ( umask > 0 )
+        {
+            permissions &= ~umask;
+        }
+
         ArchiveEntry entry;
         if ( resource.isFile() )
         {
@@ -1264,6 +1271,18 @@ public String getOverrideGroupName()
         return overrideGroupName;
     }
 
+    @Override
+    public void setUmask( int umask )
+    {
+        this.umask = umask;
+    }
+
+    @Override
+    public int getUmask()
+    {
+        return umask;
+    }
+
     /**
      * @deprecated Use {@link #configureReproducibleBuild(FileTime)} instead.
      */
@@ -1288,6 +1307,9 @@ public void configureReproducibleBuild( FileTime lastModifiedTime )
         setOverrideUserName( "root" ); // is it possible to avoid this, like "tar --numeric-owner"?
         setOverrideGid( 0 );
         setOverrideGroupName( "root" );
+
+        // 4. set umask to 022 to avoid environment umask value particularly on group write
+        setUmask( 0_022 );
     }
 
     /**

src/main/java/org/codehaus/plexus/archiver/Archiver.java

@@ -470,6 +470,16 @@ ResourceIterator getResources()
      */
     String getOverrideGroupName();
 
+    /**
+     * @since 4.7.0
+     */
+    void setUmask( int umask );
+
+    /**
+     * @since 4.7.0
+     */
+    int getUmask();
+
     /**
      * This method is obsolete and will just call {@link #configureReproducibleBuild(FileTime)}
      * with the Date transformed into FileTime.

src/main/java/org/codehaus/plexus/archiver/diags/DelgatingArchiver.java

@@ -420,6 +420,18 @@ public String getOverrideGroupName()
         return target.getOverrideGroupName();
     }
 
+    @Override
+    public void setUmask( int umask )
+    {
+        target.setUmask( umask );
+    }
+
+    @Override
+    public int getUmask()
+    {
+        return target.getUmask();
+    }
+
     /**
      * @deprecated Use {@link #configureReproducibleBuild(FileTime)} instead.
      */

src/main/java/org/codehaus/plexus/archiver/diags/NoOpArchiver.java

@@ -435,6 +435,18 @@ public String getOverrideGroupName()
         return null;
     }
 
+    @Override
+    public void setUmask( int umask )
+    {
+
+    }
+
+    @Override
+    public int getUmask()
+    {
+        return 0;
+    }
+
     /**
      * @deprecated Use {@link #configureReproducibleBuild(FileTime)} instead.
      */

src/main/java/org/codehaus/plexus/archiver/diags/TrackingArchiver.java

@@ -496,6 +496,18 @@ public String getOverrideGroupName()
         return null;
     }
 
+
+    @Override
+    public void setUmask( int umask )
+    {
+    }
+
+    @Override
+    public int getUmask()
+    {
+        return 0;
+    }
+
     /**
      * @deprecated Use {@link #configureReproducibleBuild(FileTime)} instead.
      */