[JENKINS-31162] Added NestedProjectsCategory

core/src/main/java/jenkins/model/item_category/NestedProjectsCategory.java

@@ -0,0 +1,38 @@
+package jenkins.model.item_category;
+
+import hudson.Extension;
+import jenkins.model.Messages;
+import org.kohsuke.accmod.Restricted;
+import org.kohsuke.accmod.restrictions.NoExternalUse;
+
+/**
+ * A generic {@link ItemCategory}.
+ *
+ * This category should be moved to cloudbees-folder-plugin short-term.
+ */
+@Restricted(NoExternalUse.class)
+@Extension(ordinal = -100)
+public class NestedProjectsCategory extends ItemCategory {
+
+    public static final String ID = "nestedprojects";
+
+    @Override
+    public String getId() {
+        return ID;
+    }
+
+    @Override
+    public String getDescription() {
+        return Messages.ItemCategory_NestedProjects_Description();
+    }
+
+    @Override
+    public String getDisplayName() {
+        return Messages.ItemCategory_NestedProjects_DisplayName();
+    }
+
+    @Override
+    public int getMinToShow() {
+        return ItemCategory.MIN_TOSHOW;
+    }
+}

core/src/main/resources/jenkins/model/Messages.properties

@@ -76,3 +76,5 @@ ItemCategory.Uncategorized.DisplayName=Uncategorized
 ItemCategory.Uncategorized.Description=Item types that have not yet been categorized by their plugin maintainer.
 ItemCategory.StandaloneProjects.DisplayName=Standalone Projects
 ItemCategory.StandaloneProjects.Description=Create projects with a self-contained configuration and history. These projects can be at the top-level or grouped within folders.
+ItemCategory.NestedProjects.DisplayName=Nested Projects
+ItemCategory.NestedProjects.Description=Create project categories or project hierarchies with folders. Folders can be created manually or automatically based on repositories.