Pull requests created from a fork on a topic branch aren't discovered.

src/github/folderRepositoryManager.ts

@@ -1800,25 +1800,18 @@ export class FolderRepositoryManager implements vscode.Disposable {
 			return null;
 		}
 
-		const headGitHubRepo = this.gitHubRepositories.find(
-			repo => repo.remote.remoteName === this.repository.state.HEAD?.upstream?.remote,
-		);
-
-		// Find the github repo that matches the upstream
+		// Search through each github repo to see if it has a PR with this head branch.
 		for (const repo of this.gitHubRepositories) {
-			if (repo.remote.remoteName === this.repository.state.HEAD.upstream.remote) {
-				const matchingPullRequest = await repo.getPullRequestForBranch(
-					`${headGitHubRepo?.remote.owner}:${this.repository.state.HEAD.upstream.name}`,
-				);
-				if (matchingPullRequest && matchingPullRequest.length > 0) {
-					return {
-						owner: repo.remote.owner,
-						repositoryName: repo.remote.repositoryName,
-						prNumber: matchingPullRequest[0].number,
-						model: matchingPullRequest[0],
-					};
-				}
-				break;
+			const matchingPullRequest = await repo.getPullRequestForBranch(
+				this.repository.state.HEAD.upstream.name,
+			);
+			if (matchingPullRequest) {
+				return {
+					owner: repo.remote.owner,
+					repositoryName: repo.remote.repositoryName,
+					prNumber: matchingPullRequest.number,
+					model: matchingPullRequest,
+				};
 			}
 		}
 		return null;
@@ -1905,7 +1898,7 @@ export class FolderRepositoryManager implements vscode.Disposable {
 	}
 
 	createGitHubRepositoryFromOwnerName(owner: string, repositoryName: string): GitHubRepository {
-		const existing = this.findExistingGitHubRepository({owner, repositoryName});
+		const existing = this.findExistingGitHubRepository({ owner, repositoryName });
 		if (existing) {
 			return existing;
 		}

src/github/githubRepository.ts

@@ -25,6 +25,7 @@ import {
 	MentionableUsersResponse,
 	MilestoneIssuesResponse,
 	PullRequestResponse,
+	PullRequestsResponse,
 	ViewerPermissionResponse,
 } from './graphql';
 import { IAccount, IMilestone, Issue, PullRequest, RepoAccessAndMergeMethods } from './interface';
@@ -364,26 +365,23 @@ export class GitHubRepository implements vscode.Disposable {
 		return undefined;
 	}
 
-	async getPullRequestForBranch(remoteAndBranch: string): Promise<PullRequestModel[] | undefined> {
+	async getPullRequestForBranch(branch: string): Promise<PullRequestModel | undefined> {
 		try {
 			Logger.debug(`Fetch pull requests for branch - enter`, GitHubRepository.ID);
-			const { octokit, remote } = await this.ensure();
-			const result = await octokit.pulls.list({
-				owner: remote.owner,
-				repo: remote.repositoryName,
-				head: remoteAndBranch
+			const { query, remote, schema } = await this.ensure();
+			const { data } = await query<PullRequestsResponse>({
+				query: schema.PullRequestForHead,
+				variables: {
+					owner: remote.owner,
+					name: remote.repositoryName,
+					headRefName: branch,
+				},
 			});
-
-			const pullRequests = result.data
-				.map(pullRequest => {
-					return this.createOrUpdatePullRequestModel(
-						convertRESTPullRequestToRawPullRequest(pullRequest, this),
-					);
-				})
-				.filter(item => item !== null) as PullRequestModel[];
-
 			Logger.debug(`Fetch pull requests for branch - done`, GitHubRepository.ID);
-			return pullRequests;
+
+			if (data.repository.pullRequests.nodes.length > 0) {
+				return this.createOrUpdatePullRequestModel(parseGraphQLPullRequest(data.repository.pullRequests.nodes[0], this));
+			}
 		} catch (e) {
 			Logger.appendLine(`Fetching pull requests for branch failed: ${e}`, GitHubRepository.ID);
 			if (e.code === 404) {
@@ -702,7 +700,7 @@ export class GitHubRepository implements vscode.Disposable {
 				},
 			});
 			Logger.debug(`Fetch pull request ${id} - done`, GitHubRepository.ID);
-			return this.createOrUpdatePullRequestModel(parseGraphQLPullRequest(data, this));
+			return this.createOrUpdatePullRequestModel(parseGraphQLPullRequest(data.repository.pullRequest, this));
 		} catch (e) {
 			Logger.appendLine(`GithubRepository> Unable to fetch PR: ${e}`);
 			return;

src/github/graphql.ts

@@ -504,6 +504,14 @@ export interface IssuesResponse {
 	};
 }
 
+export interface PullRequestsResponse {
+	repository: {
+		pullRequests: {
+			nodes: PullRequest[]
+		}
+	}
+}
+
 export interface MaxIssueResponse {
 	repository: {
 		issues: {

src/github/queries.gql

@@ -158,6 +158,86 @@ fragment ReviewThread on PullRequestReviewThread {
 	}
 }
 
+fragment PullRequestFragment on PullRequest {
+	number
+	url
+	state
+	body
+	bodyHTML
+	title
+	author {
+		login
+		url
+		avatarUrl
+		... on User {
+			email
+		}
+		... on Organization {
+			email
+		}
+	}
+	createdAt
+	updatedAt
+	headRef {
+		...Ref
+	}
+	headRefName
+	headRefOid
+	headRepository {
+		owner {
+			login
+		}
+		url
+	}
+	baseRef {
+		...Ref
+	}
+	baseRefName
+	baseRefOid
+	baseRepository {
+		owner {
+			login
+		}
+		url
+	}
+	labels(first: 50) {
+		nodes {
+			name
+		}
+	}
+	merged
+	mergeable
+	mergeStateStatus
+	id
+	databaseId
+	isDraft
+	milestone {
+		title
+		dueOn
+		createdAt
+		id
+	}
+	assignees(first: 10) {
+		nodes {
+			login
+			name
+			avatarUrl
+			url
+			email
+		}
+	}
+	suggestedReviewers {
+		isAuthor
+		isCommenter
+		reviewer {
+			login
+			avatarUrl
+			name
+			url
+		}
+	}
+}
+
 query TimelineEvents($owner: String!, $name: String!, $number: Int!, $last: Int = 150) {
 	repository(owner: $owner, name: $name) {
 		pullRequest(number: $number) {
@@ -290,83 +370,7 @@ query PullRequestComments($owner: String!, $name: String!, $number: Int!, $first
 query PullRequest($owner: String!, $name: String!, $number: Int!) {
 	repository(owner: $owner, name: $name) {
 		pullRequest(number: $number) {
-			number
-			url
-			state
-			body
-			bodyHTML
-			title
-			author {
-				login
-				url
-				avatarUrl
-				... on User {
-					email
-				}
-				... on Organization {
-					email
-				}
-			}
-			createdAt
-			updatedAt
-			headRef {
-				...Ref
-			}
-			headRefName
-			headRefOid
-			headRepository {
-				owner {
-					login
-				}
-				url
-			}
-			baseRef {
-				...Ref
-			}
-			baseRefName
-			baseRefOid
-			baseRepository {
-				owner {
-					login
-				}
-				url
-			}
-			labels(first: 50) {
-				nodes {
-					name
-				}
-			}
-			merged
-			mergeable
-			mergeStateStatus
-			id
-			databaseId
-			isDraft
-			milestone {
-				title
-				dueOn
-				createdAt
-				id
-			}
-			assignees(first: 10) {
-				nodes {
-					login
-					name
-					avatarUrl
-					url
-					email
-				}
-			}
-			suggestedReviewers {
-				isAuthor
-				isCommenter
-				reviewer {
-					login
-					avatarUrl
-					name
-					url
-				}
-			}
+			...PullRequestFragment
 		}
 	}
 	rateLimit {
@@ -528,6 +532,16 @@ query PullRequestState($owner: String!, $name: String!, $number: Int!) {
 	}
 }
 
+query PullRequestForHead($owner: String!, $name: String!, $headRefName: String!) {
+	repository(owner: $owner, name: $name) {
+		pullRequests(first: 1, headRefName: $headRefName) {
+			nodes {
+				...PullRequestFragment
+			}
+		}
+	}
+}
+
 mutation AddComment($input: AddPullRequestReviewCommentInput!) {
 	addPullRequestReviewComment(input: $input) {
 		comment {

src/github/utils.ts

@@ -530,11 +530,9 @@ export function parseMergeability(mergeability: 'UNKNOWN' | 'MERGEABLE' | 'CONFL
 }
 
 export function parseGraphQLPullRequest(
-	pullRequest: GraphQL.PullRequestResponse,
+	graphQLPullRequest: GraphQL.PullRequest,
 	githubRepository: GitHubRepository,
 ): PullRequest {
-	const graphQLPullRequest = pullRequest.repository.pullRequest;
-
 	return {
 		id: graphQLPullRequest.databaseId,
 		graphNodeId: graphQLPullRequest.id,

src/test/view/prsTree.test.ts

@@ -151,7 +151,7 @@ describe('GitHub Pull Requests view', function () {
 						);
 					});
 				}).pullRequest;
-				const prItem0 = parseGraphQLPullRequest(pr0, gitHubRepository);
+				const prItem0 = parseGraphQLPullRequest(pr0.repository.pullRequest, gitHubRepository);
 				const pullRequest0 = new PullRequestModel(telemetry, gitHubRepository, remote, prItem0);
 
 				const pr1 = gitHubRepository.addGraphQLPullRequest(builder => {
@@ -167,7 +167,7 @@ describe('GitHub Pull Requests view', function () {
 					);
 				});
 			}).pullRequest;
-			const prItem1 = parseGraphQLPullRequest(pr1, gitHubRepository);
+			const prItem1 = parseGraphQLPullRequest(pr1.repository.pullRequest, gitHubRepository);
 			const pullRequest1 = new PullRequestModel(telemetry, gitHubRepository, remote, prItem1);
 
 			const repository = new MockRepository();