Adds compare "selection" to Graph

 - Only works for 2 selected commits

contributions.json

@@ -1719,6 +1719,19 @@
 				]
 			}
 		},
+		"gitlens.graph.compareSelectedCommits.multi": {
+			"label": "Compare Selected Commits",
+			"icon": "$(compare-changes)",
+			"menus": {
+				"webview/context": [
+					{
+						"when": "webviewItems =~ /gitlens:commit\\b/ && listDoubleSelection",
+						"group": "4_gitlens_compare",
+						"order": 2
+					}
+				]
+			}
+		},
 		"gitlens.graph.compareWithHead": {
 			"label": "Compare to/from HEAD",
 			"icon": "$(compare-changes)",

package.json

@@ -6401,6 +6401,11 @@
 				"title": "Compare with HEAD",
 				"icon": "$(compare-changes)"
 			},
+			{
+				"command": "gitlens.graph.compareSelectedCommits.multi",
+				"title": "Compare Selected Commits",
+				"icon": "$(compare-changes)"
+			},
 			{
 				"command": "gitlens.graph.compareWithHead",
 				"title": "Compare to/from HEAD",
@@ -10353,6 +10358,10 @@
 					"command": "gitlens.graph.compareBranchWithHead",
 					"when": "false"
 				},
+				{
+					"command": "gitlens.graph.compareSelectedCommits.multi",
+					"when": "false"
+				},
 				{
 					"command": "gitlens.graph.compareWithHead",
 					"when": "false"
@@ -18502,6 +18511,11 @@
 					"command": "gitlens.graph.openCommitOnRemote.multi",
 					"when": "webviewItems =~ /gitlens:commit\\b/ && listMultiSelection && gitlens:repos:withRemotes",
 					"group": "3_gitlens_explore@2"
+				},
+				{
+					"command": "gitlens.graph.compareSelectedCommits.multi",
+					"when": "webviewItems =~ /gitlens:commit\\b/ && listDoubleSelection",
+					"group": "4_gitlens_compare@2"
 				}
 			]
 		},

src/constants.commands.ts

@@ -801,7 +801,8 @@ type GraphWebviewCommands = `graph.${
 	| 'openWorktree'
 	| 'openWorktreeInNewWindow'
 	| 'copyWorkingChangesToWorktree'
-	| 'generateCommitMessage'}`;
+	| 'generateCommitMessage'
+	| 'compareSelectedCommits.multi'}`;
 
 type TimelineWebviewCommands = `timeline.${'refresh' | 'split'}`;
 

src/plus/webviews/graph/graphWebview.ts

@@ -685,11 +685,12 @@ export class GraphWebviewProvider implements WebviewProvider<State, State, Graph
 				this.copyWorkingChangesToWorktree,
 			),
 			this.host.registerWebviewCommand('gitlens.graph.generateCommitMessage', this.generateCommitMessage),
+
+			this.host.registerWebviewCommand('gitlens.graph.compareSelectedCommits.multi', this.compareSelectedCommits),
 		);
 
 		return commands;
 	}
-
 	onWindowFocusChanged(focused: boolean): void {
 		this.isWindowFocused = focused;
 	}
@@ -3222,6 +3223,17 @@ export class GraphWebviewProvider implements WebviewProvider<State, State, Graph
 		});
 	}
 
+	@log()
+	private async compareSelectedCommits(item?: GraphItemContext) {
+		const { selection } = this.getGraphItemRefs(item, 'revision');
+		if (selection == null || selection.length !== 2) return Promise.resolve();
+
+		const [commit1, commit2] = selection;
+		const [ref1, ref2] = await getOrderedComparisonRefs(this.container, commit1.repoPath, commit1.ref, commit2.ref);
+
+		return this.container.views.searchAndCompare.compare(commit1.repoPath, ref1, ref2);
+	}
+
 	@log()
 	private copyDeepLinkToBranch(item?: GraphItemContext) {
 		if (isGraphItemRefContext(item, 'branch')) {