Fix getOrigin to fall back to configured GitHub remotes when upstream is not GitHub

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

Author: Copilot

src/github/folderRepositoryManager.ts

@@ -1493,18 +1493,18 @@ export class FolderRepositoryManager extends Disposable {
 					return this.createAndAddGitHubRepository(remote, this._credentialStore);
 				}
 
-				Logger.error(`The remote '${upstreamRef.remote}' is not a GitHub repository.`, this.id);
+				Logger.warn(`The remote '${upstreamRef.remote}' is not a GitHub repository. Falling back to configured GitHub remotes.`, this.id);
 
-				// No GitHubRepository? We currently won't try pushing elsewhere,
-				// so fail.
-				throw new BadUpstreamError(this.repository.state.HEAD!.name!, upstreamRef, 'is not a GitHub repo');
+				// No GitHubRepository? Fall back to using configured GitHub remotes
+				// instead of failing, to support scenarios where the upstream is set to
+				// a non-GitHub remote but GitHub remotes are configured separately.
+			} else {
+				// Otherwise, we'll push upstream.
+				return upstream;
 			}
-
-			// Otherwise, we'll push upstream.
-			return upstream;
 		}
 
-		// If no upstream is set, let's go digging.
+		// If no upstream is set, or upstream is not a GitHub remote, let's go digging.
 		const [first, ...rest] = this._githubRepositories;
 		return !rest.length // Is there only one GitHub remote?
 			? first // I GUESS THAT'S WHAT WE'RE GOING WITH, THEN.

src/test/github/folderRepositoryManager.test.ts

@@ -30,18 +30,19 @@ describe('PullRequestManager', function () {
 	let manager: FolderRepositoryManager;
 	let telemetry: MockTelemetry;
 	let mockThemeWatcher: MockThemeWatcher;
+	let mockRepository: MockRepository;
 
 	beforeEach(function () {
 		sinon = createSandbox();
 		MockCommandRegistry.install(sinon);
 
 		telemetry = new MockTelemetry();
 		mockThemeWatcher = new MockThemeWatcher();
-		const repository = new MockRepository();
+		mockRepository = new MockRepository();
 		const context = new MockExtensionContext();
 		const credentialStore = new CredentialStore(telemetry, context);
 		const repositoriesManager = new RepositoriesManager(credentialStore, telemetry);
-		manager = new FolderRepositoryManager(0, context, repository, telemetry, new GitApiImpl(repositoriesManager), credentialStore, new CreatePullRequestHelper(), mockThemeWatcher);
+		manager = new FolderRepositoryManager(0, context, mockRepository, telemetry, new GitApiImpl(repositoriesManager), credentialStore, new CreatePullRequestHelper(), mockThemeWatcher);
 	});
 
 	afterEach(function () {
@@ -68,6 +69,38 @@ describe('PullRequestManager', function () {
 			assert.deepStrictEqual(manager.activePullRequest, pr);
 		});
 	});
+
+	describe('getOrigin', function () {
+		it('falls back to configured GitHub remote when upstream is not GitHub', async function () {
+			// Setup: Add a GitHub remote
+			const githubUrl = 'https://github.com/test/repo.git';
+			await mockRepository.addRemote('github', githubUrl);
+
+			const githubProtocol = new Protocol(githubUrl);
+			const githubRemote = new GitHubRemote('github', githubUrl, githubProtocol, GitHubServerType.GitHubDotCom);
+			const rootUri = Uri.file('/test/repo');
+			const githubRepository = new GitHubRepository(1, githubRemote, rootUri, manager.credentialStore, telemetry);
+
+			// Manually set up the GitHub repository in the manager (simulating successful initialization)
+			(manager as any)._githubRepositories = [githubRepository];
+
+			// Add a non-GitHub remote (simulating the scenario from the bug)
+			await mockRepository.addRemote('origin', 'https://example.com/git/repo.git');
+
+			// Create a branch with upstream set to non-GitHub remote
+			await mockRepository.createBranch('test-branch', true);
+			await mockRepository.setBranchUpstream('test-branch', 'refs/remotes/origin/main');
+
+			// Mock getAllGitHubRemotes to return only the github remote
+			sinon.stub(manager, 'getAllGitHubRemotes').resolves([githubRemote]);
+
+			// Act: getOrigin should fall back to the configured GitHub remote instead of throwing
+			const result = await manager.getOrigin();
+
+			// Assert: Should return the GitHub repository, not throw an error
+			assert.strictEqual(result, githubRepository);
+		});
+	});
 });
 
 describe('titleAndBodyFrom', function () {