Add Collapse All action to SCM view pane

src/vs/workbench/contrib/scm/browser/scmViewPane.ts

@@ -1364,6 +1364,30 @@ class ExpandAllRepositoriesAction extends ViewAction<SCMViewPane> {
 registerAction2(CollapseAllRepositoriesAction);
 registerAction2(ExpandAllRepositoriesAction);
 
+class CollapseAllAction extends ViewAction<SCMViewPane> {
+	constructor() {
+		super({
+			id: `workbench.scm.action.collapseAll`,
+			title: localize('scmCollapseAll', "Collapse All"),
+			viewId: VIEW_PANE_ID,
+			f1: false,
+			icon: Codicon.collapseAll,
+			menu: {
+				id: MenuId.SCMResourceGroupContext,
+				group: 'inline',
+			}
+		});
+	}
+
+	async runInView(_: ServicesAccessor, view: SCMViewPane, repository?: ISCMRepository): Promise<void> {
+		if (repository) {
+			view.collapseAllResources(repository);
+		}
+	}
+}
+
+registerAction2(CollapseAllAction);
+
 const enum SCMInputWidgetCommandId {
 	CancelAction = 'scm.input.cancelAction',
 	SetupAction = 'scm.input.triggerSetup'
@@ -2844,6 +2868,23 @@ export class SCMViewPane extends ViewPane {
 		}
 	}
 
+	collapseAllResources(repository: ISCMRepository): void {
+		const groups = repository.provider.groups.filter(o => this.tree.hasNode(o));
+
+		let done = false;
+		for (const group of groups) {
+			for (const { element } of this.tree.getNode(group).children) {
+				done = !isSCMViewService(element) && this.tree.collapse(element, true) || done;
+			}
+		}
+
+		if (!done) {
+			for (const group of groups) {
+				this.tree.collapse(group, true);
+			}
+		}
+	}
+
 	focusPreviousInput(): void {
 		this.treeOperationSequencer.queue(() => this.focusInput(-1));
 	}