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Add structured JSON logging across webhook and review flow.

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Improve observability with correlation IDs, skip/success/failure lifecycle events, and retry diagnostics while documenting log level configuration.

Co-authored-by: Cursor <cursoragent@cursor.com>
This commit is contained in:
Daan Schouteden
2026-06-02 15:00:29 +02:00
parent 7233ab3f32
commit e9aafdf8c4
6 changed files with 125 additions and 26 deletions
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src/logging/logger.ts
+41
View File
@@ -0,0 +1,41 @@
type LogLevel = "debug" | "info" | "warn" | "error";
const levelOrder: Record<LogLevel, number> = {
debug: 10,
info: 20,
warn: 30,
error: 40
};
const currentLevel = resolveLevel(process.env.LOG_LEVEL);
export function log(level: LogLevel, message: string, context: Record<string, unknown> = {}): void {
if (levelOrder[level] < levelOrder[currentLevel]) {
return;
}
const payload = {
timestamp: new Date().toISOString(),
level,
message,
...context
};
const line = JSON.stringify(payload);
if (level === "error" || level === "warn") {
console.error(line);
return;
}
console.log(line);
}
function resolveLevel(level: string | undefined): LogLevel {
if (!level) {
return "info";
}
const normalized = level.toLowerCase();
if (normalized === "debug" || normalized === "info" || normalized === "warn" || normalized === "error") {
return normalized;
}
return "info";
}
src/run/retry.ts
+11
View File
@@ -1,8 +1,12 @@
import { log } from "../logging/logger.js";
export async function retry<T>(input: {
fn: () => Promise<T>;
retries: number;
initialDelayMs: number;
shouldRetry?: (error: unknown) => boolean;
operationName?: string;
correlationId?: string;
}): Promise<T> {
let attempt = 0;
let delay = input.initialDelayMs;
@@ -15,6 +19,13 @@ export async function retry<T>(input: {
if (!retryable || attempt > input.retries) {
throw error;
}
log("warn", "Retrying operation after error", {
operation: input.operationName ?? "unknown",
attempt,
retries: input.retries,
correlation_id: input.correlationId,
error: error instanceof Error ? error.message : String(error)
});
await sleep(delay);
delay *= 2;
}
src/run/review-runner.ts
+45 -17
View File
@@ -8,6 +8,7 @@ import { deletePriorBotReviews, postReview } from "../gitea/review-api.js";
import { removeBotFromReviewers } from "../gitea/reviewer-api.js";
import { buildReviewPrompt } from "../prompt/build-review-prompt.js";
import { RoutedEvent } from "../types/events.js";
import { log } from "../logging/logger.js";
import { retry } from "./retry.js";
export async function runReview(input: {
@@ -28,6 +29,13 @@ export async function runReview(input: {
headSha
});
if (input.dedupe.has(dedupeKey)) {
log("info", "Review skipped: duplicate webhook", {
correlation_id: input.correlationId,
owner,
repo,
pr_number: prNumber,
head_sha: headSha
});
return "skipped";
}
input.dedupe.mark(dedupeKey);
@@ -36,7 +44,9 @@ export async function runReview(input: {
const pull = await retry({
fn: () => gitea.getPull(owner, repo, prNumber),
retries: 2,
initialDelayMs: 300
initialDelayMs: 300,
operationName: "getPull",
correlationId: input.correlationId
});
const { config: repoConfig, ruleFiles } = await retry({
fn: () =>
@@ -47,7 +57,9 @@ export async function runReview(input: {
ref: pull.head.ref
}),
retries: 2,
initialDelayMs: 300
initialDelayMs: 300,
operationName: "loadRepoConfig",
correlationId: input.correlationId
});
const should = shouldProcessEvent({
@@ -57,13 +69,23 @@ export async function runReview(input: {
botLogin: input.env.GITEA_BOT_LOGIN
});
if (!should.process) {
log("info", "Review skipped by policy", {
correlation_id: input.correlationId,
owner,
repo,
pr_number: prNumber,
head_sha: headSha,
reason: should.reason ?? "unknown"
});
return "skipped";
}
const files = await retry({
fn: () => gitea.getPullFiles(owner, repo, prNumber),
retries: 2,
initialDelayMs: 300
initialDelayMs: 300,
operationName: "getPullFiles",
correlationId: input.correlationId
});
const maxInlineComments = repoConfig.max_inline_comments ?? input.env.MAX_INLINE_COMMENTS;
const prompt = buildReviewPrompt({
@@ -83,7 +105,9 @@ export async function runReview(input: {
model: repoConfig.model
}),
retries: 2,
initialDelayMs: 500
initialDelayMs: 500,
operationName: "runCursorReview",
correlationId: input.correlationId
});
await retry({
@@ -96,7 +120,9 @@ export async function runReview(input: {
botLogin: input.env.GITEA_BOT_LOGIN
}),
retries: 2,
initialDelayMs: 300
initialDelayMs: 300,
operationName: "deletePriorBotReviews",
correlationId: input.correlationId
});
await retry({
@@ -111,7 +137,9 @@ export async function runReview(input: {
maxInlineComments
}),
retries: 2,
initialDelayMs: 300
initialDelayMs: 300,
operationName: "postReview",
correlationId: input.correlationId
});
await retry({
@@ -124,18 +152,18 @@ export async function runReview(input: {
botLogin: input.env.GITEA_BOT_LOGIN
}),
retries: 2,
initialDelayMs: 300
initialDelayMs: 300,
operationName: "removeBotFromReviewers",
correlationId: input.correlationId
});
console.log(
JSON.stringify({
correlation_id: input.correlationId,
owner,
repo,
pr_number: prNumber,
head_sha: headSha,
outcome: "success"
})
);
log("info", "Review completed", {
correlation_id: input.correlationId,
owner,
repo,
pr_number: prNumber,
head_sha: headSha,
outcome: "success"
});
return "success";
}
src/server.ts
+25 -9
View File
@@ -2,6 +2,7 @@ import crypto from "node:crypto";
import http from "node:http";
import { loadEnv } from "./config/env.js";
import { DedupeStore } from "./domain/dedupe-store.js";
import { log } from "./logging/logger.js";
import { runReview } from "./run/review-runner.js";
import { PullRequestWebhookPayload } from "./types/events.js";
import { routeEvent } from "./webhook/event-router.js";
@@ -24,9 +25,13 @@ const server = http.createServer(async (req, res) => {
}
const body = await readBody(req);
const correlationId = crypto.randomUUID();
const signature = req.headers["x-gitea-signature"];
const signatureValue = Array.isArray(signature) ? signature[0] : signature;
if (!verifySignature({ secret: env.WEBHOOK_SECRET, body, signatureHeader: signatureValue })) {
log("warn", "Webhook rejected: invalid signature", {
correlation_id: correlationId
});
res.writeHead(401);
res.end("invalid signature");
return;
@@ -35,6 +40,15 @@ const server = http.createServer(async (req, res) => {
const eventNameHeader = req.headers["x-gitea-event"];
const eventName = Array.isArray(eventNameHeader) ? eventNameHeader[0] : eventNameHeader;
const payload = JSON.parse(body) as PullRequestWebhookPayload;
log("info", "Webhook received", {
correlation_id: correlationId,
event: eventName ?? "unknown",
action: payload.action,
owner: payload.repository.owner.login,
repo: payload.repository.name,
pr_number: payload.pull_request.number,
head_sha: payload.pull_request.head.sha
});
const routed = routeEvent({
eventName,
payload,
@@ -42,12 +56,16 @@ const server = http.createServer(async (req, res) => {
});
if (!routed) {
log("info", "Webhook ignored by router", {
correlation_id: correlationId,
event: eventName ?? "unknown",
action: payload.action
});
res.writeHead(202);
res.end("ignored");
return;
}
const correlationId = crypto.randomUUID();
try {
const outcome = await runReview({
env,
@@ -58,20 +76,18 @@ const server = http.createServer(async (req, res) => {
res.writeHead(200);
res.end(outcome);
} catch (error) {
console.error(
JSON.stringify({
correlation_id: correlationId,
outcome: "failed",
error: error instanceof Error ? error.message : String(error)
})
);
log("error", "Webhook processing failed", {
correlation_id: correlationId,
outcome: "failed",
error: error instanceof Error ? error.message : String(error)
});
res.writeHead(500);
res.end("failed");
}
});
server.listen(env.PORT, () => {
console.log(`gitea-pr-review-bot listening on :${env.PORT}`);
log("info", "Service started", { port: env.PORT });
});
function readBody(req: http.IncomingMessage): Promise<string> {