Handle bundle folders in VirtualArtifactRepository.transferArtifact

The implementation currently assumes all bundles are jars, but bundles
from the shared bundle pool may be unpacked as folders.

#962

ui/org.eclipse.pde.core/src/org/eclipse/pde/internal/core/target/VirtualArtifactRepository.java

@@ -14,6 +14,7 @@
 package org.eclipse.pde.internal.core.target;
 
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.FileNotFoundException;
 import java.io.InputStream;
 import java.io.OutputStream;
@@ -22,9 +23,11 @@
 import java.nio.file.Files;
 import java.util.HashMap;
 import java.util.Map;
+import java.util.Set;
 import java.util.UUID;
 import java.util.jar.JarEntry;
 import java.util.jar.JarOutputStream;
+import java.util.zip.ZipOutputStream;
 
 import org.eclipse.core.runtime.Assert;
 import org.eclipse.core.runtime.CoreException;
@@ -34,6 +37,7 @@
 import org.eclipse.core.runtime.Status;
 import org.eclipse.core.runtime.SubMonitor;
 import org.eclipse.equinox.frameworkadmin.BundleInfo;
+import org.eclipse.equinox.internal.p2.core.helpers.FileUtils;
 import org.eclipse.equinox.internal.p2.metadata.expression.QueryResult;
 import org.eclipse.equinox.p2.core.IProvisioningAgent;
 import org.eclipse.equinox.p2.core.ProvisionException;
@@ -123,8 +127,17 @@ private void transferArtifact(Object artifactModel, OutputStream destination) th
  if (location == null) {
  throw new FileNotFoundException(bundleInfo.getSymbolicName());
  }
- try (InputStream is = location.toURL().openStream()) {
- is.transferTo(destination);
+
+ File bundleLocation = new File(location);
+ if (bundleLocation.isFile()) {
+ try (InputStream is = new FileInputStream(bundleLocation)) {
+ is.transferTo(destination);
+ }
+ } else {
+ ZipOutputStream zip = new ZipOutputStream(destination);
+ FileUtils.zip(zip, bundleLocation, Set.of(), FileUtils.createRootPathComputer(bundleLocation));
+ zip.finish();
+ zip.flush();
  }
  } else if (artifactModel instanceof IFeatureModel featureModel) {
  String installLocation = featureModel.getInstallLocation();