Garbage collect old p2 profiles

openchrom/plugins/net.openchrom.installer.ui/META-INF/MANIFEST.MF

@@ -31,6 +31,7 @@ Require-Bundle: org.eclipse.core.runtime,
  org.eclipse.equinox.p2.operations;bundle-version="2.7.100",
  org.eclipse.equinox.p2.repository;bundle-version="2.7.100",
  org.eclipse.equinox.p2.engine;bundle-version="2.10.600",
+ org.eclipse.equinox.p2.garbagecollector;bundle-version="1.3.0",
  org.eclipse.equinox.p2.ui;bundle-version="2.8.100",
  org.eclipse.chemclipse.progress;bundle-version="0.9.0",
  net.openchrom.feature.branding;bundle-version="1.6.13",

openchrom/plugins/net.openchrom.installer.ui/plugin.xml

@@ -4,11 +4,8 @@
          point="org.eclipse.ui.startup">
       <startup
             class="net.openchrom.installer.ui.FeatureCheck"></startup>
-   </extension>
-   <extension
-         point="org.eclipse.ui.startup">
       <startup
-            class="net.openchrom.installer.ui.RepositoryCleanup"></startup>
+            class="net.openchrom.installer.ui.P2Cleanup"></startup>
    </extension>
    <extension
          id="com.lablicate.installer.ui.fragment"

openchrom/plugins/net.openchrom.installer.ui/src/net/openchrom/installer/ui/RepositoryCleanup.java → openchrom/plugins/net.openchrom.installer.ui/src/net/openchrom/installer/ui/P2Cleanup.java

@@ -15,7 +15,11 @@
 import java.net.URI;
 
 import org.eclipse.chemclipse.logging.core.Logger;
+import org.eclipse.equinox.internal.p2.garbagecollector.GarbageCollector;
 import org.eclipse.equinox.p2.core.IProvisioningAgent;
+import org.eclipse.equinox.p2.core.ProvisionException;
+import org.eclipse.equinox.p2.engine.IProfile;
+import org.eclipse.equinox.p2.engine.IProfileRegistry;
 import org.eclipse.equinox.p2.repository.IRepository;
 import org.eclipse.equinox.p2.repository.IRepositoryManager;
 import org.eclipse.equinox.p2.repository.artifact.IArtifactRepositoryManager;
@@ -26,20 +30,67 @@
 import org.osgi.framework.Version;
 import org.osgi.util.tracker.ServiceTracker;
 
-public class RepositoryCleanup implements IStartup {
+public class P2Cleanup implements IStartup {
 
-	private static final Logger logger = Logger.getLogger(RepositoryCleanup.class);
+	private static final Logger logger = Logger.getLogger(P2Cleanup.class);
 
 	@Override
 	public void earlyStartup() {
 
-		BundleContext context = FrameworkUtil.getBundle(RepositoryCleanup.class).getBundleContext();
+		BundleContext context = FrameworkUtil.getBundle(P2Cleanup.class).getBundleContext();
 		ServiceTracker<IProvisioningAgent, IProvisioningAgent> tracker = new ServiceTracker<>(context, IProvisioningAgent.class, null);
 		tracker.open();
-		cleanRepositories(tracker.getService(), context.getBundle().getVersion());
+		IProvisioningAgent agent = tracker.getService();
+		cleanRepositories(agent, context.getBundle().getVersion());
+		cleanProfileStates(agent);
 		tracker.close();
 	}
 
+	/*
+	 * Delete old snapshots of the running profile so bundles referenced in it are removed from disk.
+	 */
+	private static void cleanProfileStates(IProvisioningAgent agent) {
+
+		if(agent == null) {
+			return;
+		}
+		IProfileRegistry profileRegistry = agent.getService(IProfileRegistry.class);
+		if(profileRegistry == null) {
+			return;
+		}
+		IProfile profile = profileRegistry.getProfile(IProfileRegistry.SELF);
+		if(profile == null) {
+			return;
+		}
+		String profileId = profile.getProfileId();
+		long[] timestamps = profileRegistry.listProfileTimestamps(profileId);
+		if(timestamps.length <= 1) {
+			return;
+		}
+		boolean removed = false;
+		// The last timestamp belongs to the currently running profile and must be kept.
+		for(int i = 0; i < timestamps.length - 1; i++) {
+			try {
+				profileRegistry.removeProfile(profileId, timestamps[i]);
+				removed = true;
+			} catch(ProvisionException e) {
+				logger.warn(e);
+			}
+		}
+		if(removed) {
+			runGarbageCollector(agent, profile);
+		}
+	}
+
+	@SuppressWarnings("restriction")
+	private static void runGarbageCollector(IProvisioningAgent agent, IProfile profile) {
+
+		GarbageCollector garbageCollector = agent.getService(GarbageCollector.class);
+		if(garbageCollector != null) {
+			garbageCollector.runGC(profile);
+		}
+	}
+
 	private static void cleanRepositories(IProvisioningAgent agent, Version version) {
 
 		var currentVersion = version.getMajor() + "." + version.getMinor() + "." + version.getMicro();