Introduce experimental API for adding actions to experimental Run UI

core/src/main/java/hudson/Functions.java

@@ -170,6 +170,7 @@
 import jenkins.model.details.DetailFactory;
 import jenkins.model.details.DetailGroup;
 import jenkins.util.SystemProperties;
+import net.sf.json.JSONObject;
 import org.apache.commons.jelly.JellyContext;
 import org.apache.commons.jelly.JellyTagException;
 import org.apache.commons.jelly.Script;
@@ -2599,6 +2600,16 @@
         return String.valueOf(Math.floor(Math.random() * 3000));
     }
 
+    /**
+     * Converts the given actions to a JSON object
+     */
+    @Restricted(NoExternalUse.class)
+    public static String convertActionsToJson(List<Action> actions) {
+        ModelObjectWithContextMenu.ContextMenu contextMenu = new ModelObjectWithContextMenu.ContextMenu();
+        contextMenu.addAll(actions);
+        return JSONObject.fromObject(contextMenu).toString();
+    }
+
     /**
      * Returns a grouped list of Detail objects for the given Actionable object
      */

core/src/main/java/hudson/model/Action.java

@@ -26,6 +26,10 @@
 
 import edu.umd.cs.findbugs.annotations.CheckForNull;
 import hudson.Functions;
+import jenkins.model.menu.Group;
+import jenkins.model.menu.Semantic;
+import jenkins.model.menu.event.Event;
+import jenkins.model.menu.event.LinkEvent;
 
 /**
  * Object that contributes additional information, behaviors, and UIs to {@link ModelObject}
@@ -137,6 +141,27 @@
      *      null if this action object doesn't need to be bound to web
      *      (when you do that, be sure to also return null from {@link #getIconFileName()}.
      * @see Functions#getActionUrl(String, Action)
+     *
+     * @deprecated
+     *      Override {@link #getEvent()} instead
      */
-    @CheckForNull String getUrlName();
+    @CheckForNull default String getUrlName() {
+        return null;
+    }
+
+    default Group getGroup() {
+        return Group.IN_MENU;
+    }
+
+    default Event getEvent() {
+        return LinkEvent.of(getUrlName());
+    }
+
+    default Semantic getSemantic() {
+        return null;
+    }
+
+    default boolean isVisibleInContextMenu() {
+        return true;
+    }
 }

core/src/main/java/hudson/model/Actionable.java

@@ -30,14 +30,20 @@
 import java.util.ArrayList;
 import java.util.Collection;
 import java.util.Collections;
+import java.util.Comparator;
 import java.util.List;
+import java.util.Objects;
 import java.util.Set;
 import java.util.concurrent.CopyOnWriteArrayList;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import java.util.stream.Collectors;
 import jenkins.model.ModelObjectWithContextMenu;
+import jenkins.model.Tab;
 import jenkins.model.TransientActionFactory;
 import jenkins.security.stapler.StaplerNotDispatchable;
+import org.apache.commons.lang.StringUtils;
+import org.jenkins.ui.icon.IconSpec;
 import org.kohsuke.stapler.StaplerRequest;
 import org.kohsuke.stapler.StaplerRequest2;
 import org.kohsuke.stapler.StaplerResponse;
@@ -113,6 +119,29 @@
         return Collections.unmodifiableList(_actions);
     }
 
+    /**
+     * TODO
+     * @since TODO
+     */
+    public List<Action> getAppBarActions() {
+        return getAllActions().stream()
+                .filter(e -> !(e instanceof Tab))
+                .filter(e -> {
+                    String icon = e.getIconFileName();
+
+                    if (e instanceof IconSpec) {
+                        if (((IconSpec) e).getIconClassName() != null) {
+                            icon = ((IconSpec) e).getIconClassName();
+                        }
+                    }
+
+                    return !StringUtils.isBlank(e.getDisplayName()) && !StringUtils.isBlank(icon);
+                })
+                .sorted(Comparator.comparingInt((Action e) -> e.getGroup().getOrder())
+                        .thenComparing(e -> Objects.requireNonNullElse(e.getDisplayName(), "")))
+                .collect(Collectors.toUnmodifiableList());
+    }
+
     private <T> Collection<? extends Action> createFor(TransientActionFactory<T> taf) {
         try {
             Collection<? extends Action> result = taf.createFor(taf.type().cast(this));