[JENKINS-69588] Stop installed plugins page jumping on load (#9141)

core/src/main/java/hudson/PluginManager.java

@@ -91,6 +91,7 @@ import java.time.Duration;
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.Enumeration;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -1253,6 +1254,13 @@ public abstract class PluginManager extends AbstractModelObject implements OnMas
         return Collections.unmodifiableList(plugins);
     }
 
+    @Restricted(NoExternalUse.class) // used by jelly
+    public List<PluginWrapper> getPluginsSortedByTitle() {
+        return plugins.stream()
+                .sorted(Comparator.comparing(PluginWrapper::getDisplayName, String.CASE_INSENSITIVE_ORDER))
+                .collect(Collectors.toUnmodifiableList());
+    }
+
     public List<FailedPlugin> getFailedPlugins() {
         return failedPlugins;
     }

core/src/main/resources/hudson/PluginManager/installed.jelly

@@ -85,7 +85,7 @@ THE SOFTWARE.
             </tr>
             </thead>
             <tbody>
-              <j:forEach var="p" items="${app.pluginManager.plugins}">
+              <j:forEach var="p" items="${app.pluginManager.pluginsSortedByTitle}">
                 <tr
                   class="plugin ${p.hasMandatoryDependents()?'has-dependents':''} ${(p.hasMandatoryDependents() and !p.enabled)?'has-dependents-but-disabled':''} ${p.isDeleted()?'deleted':''} ${p.hasImpliedDependents() and p.enabled ? 'possibly-has-implied-dependents' : ''}"
                   data-plugin-id="${p.shortName}" data-plugin-name="${p.displayName}">

test/src/test/java/hudson/PluginManagerTest.java

@@ -29,6 +29,7 @@ import static java.nio.file.attribute.PosixFilePermission.OWNER_READ;
 import static java.nio.file.attribute.PosixFilePermission.OWNER_WRITE;
 import static org.awaitility.Awaitility.await;
 import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.containsInRelativeOrder;
 import static org.hamcrest.Matchers.empty;
 import static org.hamcrest.Matchers.not;
 import static org.junit.Assert.assertEquals;
@@ -81,6 +82,7 @@ import java.util.Optional;
 import java.util.Set;
 import java.util.concurrent.Future;
 import java.util.concurrent.TimeUnit;
+import java.util.stream.Collectors;
 import javax.servlet.ServletException;
 import jenkins.ClassLoaderReflectionToolkit;
 import jenkins.RestartRequiredException;
@@ -626,6 +628,17 @@ public class PluginManagerTest {
         assertTrue(ExtensionList.lookup(GlobalConfiguration.class).stream().anyMatch(gc -> "io.jenkins.plugins.MyGlobalConfiguration".equals(gc.getClass().getName())));
     }
 
+    @Test @Issue("JENKINS-64840")
+    @WithPlugin({"mandatory-depender-0.0.2.hpi", "dependee-0.0.2.hpi", "depender-0.0.2.hpi"})
+    public void getPluginsSortedByTitle() throws Exception {
+        List<String> installedPlugins = r.jenkins.getPluginManager().getPluginsSortedByTitle()
+                .stream()
+                .map(PluginWrapper::getDisplayName)
+                .collect(Collectors.toUnmodifiableList());
+
+        assertThat(installedPlugins, containsInRelativeOrder("dependee", "depender", "mandatory-depender"));
+    }
+
     @Issue("JENKINS-62622")
     @Test
     @WithPlugin("legacy.hpi")