[Docs Site] Post PR comment when CI fails

.github/workflows/ci.yml

@@ -57,3 +57,10 @@ jobs:
 
       - name: Tests
         run: npm run test
+
+      - name: Post PR CI failure comment
+        if: always()
+        continue-on-error: true
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: npx tsx bin/post-pr-ci-failure-comment/index.ts

bin/post-pr-ci-failure-comment/constants.ts

@@ -0,0 +1,4 @@
+export const GITHUB_ACTIONS_BOT_ID = 41898282;
+export const DOCS_BASE_URL = "https://developers.cloudflare.com";
+export const CONTENT_BASE_PATH = "src/content";
+export const PREVIEW_URL_REGEX = /^\*\*Preview URL:\*\* (.*)$/m;

bin/post-pr-ci-failure-comment/index.ts

@@ -0,0 +1,101 @@
+import * as core from "@actions/core";
+import * as github from "@actions/github";
+import type { PullRequestEvent } from "@octokit/webhooks-types";
+
+import { GITHUB_ACTIONS_BOT_ID } from "./constants";
+
+async function run(): Promise<void> {
+	try {
+		if (!process.env.GITHUB_TOKEN) {
+			core.setFailed(`Could not find GITHUB_TOKEN in env`);
+			process.exit();
+		}
+
+		const octokit = github.getOctokit(process.env.GITHUB_TOKEN);
+		const payload = github.context.payload as PullRequestEvent;
+
+		const { owner, repo } = github.context.repo;
+		const pullRequestNumber = payload.number;
+		const runId = github.context.runId;
+
+		const { data: run } = await octokit.rest.actions.listJobsForWorkflowRun({
+			owner,
+			repo,
+			run_id: runId,
+		});
+
+		const job = run.jobs.findLast((job) => job.name === "Compiles");
+
+		if (!job) {
+			core.setFailed(`Could not find a job called 'Compiles'`);
+			process.exit();
+		}
+
+		const failedStep = job.steps?.find((step) => step.conclusion === "failure");
+
+		if (failedStep) {
+			core.info(`Found failed step ${failedStep.name}`);
+		}
+
+		const conclusion = failedStep ? "failure" : "success";
+
+		const { data: comments } = await octokit.rest.issues.listComments({
+			owner,
+			repo,
+			issue_number: pullRequestNumber,
+			per_page: 100,
+		});
+
+		const existingComment = comments.find(
+			(comment) =>
+				comment.user?.id === GITHUB_ACTIONS_BOT_ID &&
+				comment.body?.includes("**CI run failed:**"),
+		);
+
+		if (existingComment) {
+			core.info(`Found existing comment with ID ${existingComment.id}`);
+		} else {
+			core.info(`No existing comment found`);
+		}
+
+		const url = `https://github.com/${owner}/${repo}/actions/runs/${runId}/job/${job.id}`;
+		const comment = `**CI run failed:** [build logs](${url})`;
+
+		if (conclusion === "failure") {
+			if (existingComment) {
+				core.info(
+					`Updating ${existingComment.id} with ${JSON.stringify(comment)}`,
+				);
+				await octokit.rest.issues.updateComment({
+					owner,
+					repo,
+					comment_id: existingComment.id,
+					body: comment,
+				});
+			} else {
+				core.info(`Creating new comment with ${JSON.stringify(comment)}`);
+				await octokit.rest.issues.createComment({
+					owner,
+					repo,
+					issue_number: pullRequestNumber,
+					body: comment,
+				});
+			}
+		} else if (conclusion === "success" && existingComment) {
+			core.info(`Removing ${existingComment.id}`);
+			await octokit.rest.issues.deleteComment({
+				owner,
+				repo,
+				issue_number: pullRequestNumber,
+				comment_id: existingComment.id,
+			});
+		}
+	} catch (error) {
+		if (error instanceof Error) {
+			core.setFailed(error.message);
+		}
+		process.exit();
+	}
+}
+
+run();

package.json

@@ -41,6 +41,7 @@
 		"@expressive-code/plugin-collapsible-sections": "0.40.2",
 		"@iarna/toml": "2.2.5",
 		"@marsidev/react-turnstile": "1.1.0",
+		"@octokit/webhooks-types": "7.6.1",
 		"@stoplight/json-schema-tree": "4.0.0",
 		"@types/hast": "3.0.4",
 		"@types/he": "1.2.3",