Function fetchGitHubPRStatus

src/main/lib/git/github/github.ts:24–73

(
	worktreePath: string,
)

 * Results are cached for 10 seconds.
 */
export async function fetchGitHubPRStatus(
	worktreePath: string,
): Promise<GitHubStatus | null> {
	// Check cache first
	const cached = cache.get(worktreePath);
	if (cached && Date.now() - cached.timestamp < CACHE_TTL_MS) {
		return cached.data;
	}

	try {
		// First, get the repo URL
		const repoUrl = await getRepoUrl(worktreePath);
		if (!repoUrl) {
			return null;
		}

		// Get current branch name
		const { stdout: branchOutput } = await execFileAsync(
			"git",
			["rev-parse", "--abbrev-ref", "HEAD"],
			{ cwd: worktreePath },
		);
		const branchName = branchOutput.trim();

		// Check if branch exists on remote and get PR info in parallel
		const [branchCheck, prInfo] = await Promise.all([
			branchExistsOnRemote(worktreePath, branchName),
			getPRForBranch(worktreePath, branchName),
		]);

		// Convert result to boolean - only "exists" is true
		// "not_found" and "error" both mean we can't confirm it exists
		const existsOnRemote = branchCheck.status === "exists";

		const result: GitHubStatus = {
			pr: prInfo,
			repoUrl,
			branchExistsOnRemote: existsOnRemote,
			lastRefreshed: Date.now(),
		};

		// Cache the result
		cache.set(worktreePath, { data: result, timestamp: Date.now() });

		return result;
	} catch {
		// Any error (gh not installed, not auth'd, etc.) - return null
		return null;
	}
}

async function getRepoUrl(worktreePath: string): Promise<string | null> {
	try {