kunthawat
2d1be52177
Fixes: 1. media.ts: wrap placeholder generation in try-catch 2. toolbar.ts: check r.ok, display error message in popover
78 lines
2.3 KiB
TypeScript
78 lines
2.3 KiB
TypeScript
/**
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* GitHub API helpers for resolving a commit SHA to a merged PR number.
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*
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* Uses the "list pull requests associated with a commit" endpoint:
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* https://docs.github.com/en/rest/commits/commits#list-pull-requests-associated-with-a-commit
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*
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* Called unauthenticated. The public repo endpoint has a 60 req/hr limit per IP,
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* which is far more than our deploy rate. If that ever changes, add a token:
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* `headers.authorization = "Bearer " + env.GITHUB_TOKEN`.
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*/
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import { GITHUB_REPO } from "./routes.js";
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interface AssociatedPR {
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number: number;
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state: string;
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merged_at: string | null;
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base: { ref: string };
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}
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const PR_NUMBER_REGEX = /\(#(\d+)\)\s*$/;
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/**
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* Parse a PR number from a commit message. GitHub squash merges append the PR
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* number in parentheses, e.g. "feat: add feature (#123)".
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*/
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function parsePrFromMessage(commitMessage: string): number | null {
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const match = commitMessage.match(PR_NUMBER_REGEX);
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if (!match?.[1]) return null;
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return parseInt(match[1], 10);
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}
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/**
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* Find the merged PR for a given commit SHA, if any.
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*
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* Strategy:
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* 1. Parse the commit message for `(#N)` — works for squash merges (the common case).
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* 2. Fall back to the GitHub "list PRs for a commit" API — works for merge commits.
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*
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* Returns null if no PR exists (e.g. direct push to main) or the lookup fails.
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*/
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export async function resolvePrForSha(sha: string, commitMessage?: string): Promise<number | null> {
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if (commitMessage) {
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const fromMessage = parsePrFromMessage(commitMessage);
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if (fromMessage) return fromMessage;
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}
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const url = `https://api.github.com/repos/${GITHUB_REPO}/commits/${sha}/pulls`;
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let response: Response;
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try {
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response = await fetch(url, {
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headers: {
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accept: "application/vnd.github+json",
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"user-agent": "emdash-perf-monitor",
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"x-github-api-version": "2022-11-28",
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},
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});
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} catch (err) {
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console.error("PR lookup failed:", err);
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return null;
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}
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if (!response.ok) {
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console.warn(`PR lookup for ${sha} returned ${response.status}`);
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return null;
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}
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const prs = await response.json<AssociatedPR[]>();
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// Prefer a merged PR targeting main. Fall back to any merged PR.
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const mainPr = prs.find((p) => p.merged_at && p.base.ref === "main");
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if (mainPr) return mainPr.number;
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const anyMerged = prs.find((p) => p.merged_at);
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if (anyMerged) return anyMerged.number;
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return null;
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}
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