auxiliary bar contibution point (#174)

src/vs/workbench/api/browser/viewsExtensionPoint.ts

@@ -70,6 +70,11 @@ export const viewsContainersContribution: IJSONSchema = {
 			description: localize('views.container.panel', "Contribute views containers to Panel"),
 			type: 'array',
 			items: viewsContainerSchema
+		},
+		"auxiliarybar": {
+			description: localize('views.container.auxiliarybar', "Contribute views containers to Secondary Side Bar"),
+			type: 'array',
+			items: viewsContainerSchema
 		}
 	}
 };
@@ -300,6 +305,8 @@ class ViewsExtensionHandler implements IWorkbenchContribution {
 		const viewContainersRegistry = Registry.as<IViewContainersRegistry>(ViewContainerExtensions.ViewContainersRegistry);
 		let activityBarOrder = CUSTOM_VIEWS_START_ORDER + viewContainersRegistry.all.filter(v => !!v.extensionId && viewContainersRegistry.getViewContainerLocation(v) === ViewContainerLocation.Sidebar).length;
 		let panelOrder = 5 + viewContainersRegistry.all.filter(v => !!v.extensionId && viewContainersRegistry.getViewContainerLocation(v) === ViewContainerLocation.Panel).length + 1;
+		let auxiliaryBarOrder = CUSTOM_VIEWS_START_ORDER + viewContainersRegistry.all.filter(v => !!v.extensionId && viewContainersRegistry.getViewContainerLocation(v) === ViewContainerLocation.AuxiliaryBar).length;
+
 		for (const { value, collector, description } of extensionPoints) {
 			Object.entries(value).forEach(([key, value]) => {
 				if (!this.isValidViewsContainer(value, collector)) {
@@ -312,6 +319,9 @@ class ViewsExtensionHandler implements IWorkbenchContribution {
 					case 'panel':
 						panelOrder = this.registerCustomViewContainers(value, description, panelOrder, existingViewContainers, ViewContainerLocation.Panel);
 						break;
+					case 'auxiliarybar':
+						auxiliaryBarOrder = this.registerCustomViewContainers(value, description, auxiliaryBarOrder, existingViewContainers, ViewContainerLocation.AuxiliaryBar);
+						break;
 				}
 			});
 		}