show actions in the right editor only

extensions/git/package.json

@@ -838,17 +838,17 @@
         {
           "command": "git.stageSelectedRanges",
           "group": "2_git@1",
-          "when": "config.git.enabled && gitOpenRepositoryCount != 0 && isInDiffEditor && resourceScheme =~ /^git$|^file$/"
+          "when": "isInDiffRightEditor && config.git.enabled && gitOpenRepositoryCount != 0 && isInDiffEditor && resourceScheme =~ /^git$|^file$/"
         },
         {
           "command": "git.unstageSelectedRanges",
           "group": "2_git@2",
-          "when": "config.git.enabled && gitOpenRepositoryCount != 0 && isInDiffEditor && resourceScheme =~ /^git$|^file$/"
+          "when": "isInDiffRightEditor && config.git.enabled && gitOpenRepositoryCount != 0 && isInDiffEditor && resourceScheme =~ /^git$|^file$/"
         },
         {
           "command": "git.revertSelectedRanges",
           "group": "2_git@3",
-          "when": "config.git.enabled && gitOpenRepositoryCount != 0 && isInDiffEditor && resourceScheme =~ /^git$|^file$/"
+          "when": "isInDiffRightEditor && config.git.enabled && gitOpenRepositoryCount != 0 && isInDiffEditor && resourceScheme =~ /^git$|^file$/"
         }
       ],
       "scm/change/title": [

src/vs/editor/browser/widget/diffEditorWidget.ts

@@ -284,13 +284,22 @@ export class DiffEditorWidget extends Disposable implements editorBrowser.IDiffE
 
 		this._lineChanges = null;
 
-		const services = new ServiceCollection();
-		services.set(IContextKeyService, this._contextKeyService);
+		const leftContextKeyService = this._contextKeyService.createScoped();
+		leftContextKeyService.createKey('isInDiffLeftEditor', true);
 
-		const scopedInstantiationService = instantiationService.createChild(services);
+		const leftServices = new ServiceCollection();
+		leftServices.set(IContextKeyService, leftContextKeyService);
+		const leftScopedInstantiationService = instantiationService.createChild(leftServices);
 
-		this._createLeftHandSideEditor(options, scopedInstantiationService);
-		this._createRightHandSideEditor(options, scopedInstantiationService);
+		const rightContextKeyService = this._contextKeyService.createScoped();
+		rightContextKeyService.createKey('isInDiffRightEditor', true);
+
+		const rightServices = new ServiceCollection();
+		rightServices.set(IContextKeyService, rightContextKeyService);
+		const rightScopedInstantiationService = instantiationService.createChild(rightServices);
+
+		this._createLeftHandSideEditor(options, leftScopedInstantiationService);
+		this._createRightHandSideEditor(options, rightScopedInstantiationService);
 
 		this._reviewPane = new DiffReview(this);
 		this._containerDomElement.appendChild(this._reviewPane.domNode.domNode);