Display the Plugin Check report in the PR as a comment.

package.json

@@ -24,7 +24,8 @@
     "all": "npm run build && npm run format && npm run lint && npm run package"
   },
   "dependencies": {
-    "@actions/core": "^1.11.1"
+    "@actions/core": "^1.11.1",
+    "@actions/github": "^6.0.1"
   },
   "devDependencies": {
     "@eslint/js": "^9.39.1",

src/main.ts

@@ -1,5 +1,16 @@
-import { setFailed, error, warning } from '@actions/core';
+import {
+	setFailed,
+	info,
+	error,
+	warning,
+	getInput,
+	startGroup,
+	endGroup,
+} from '@actions/core';
+import { context } from '@actions/github';
 import { existsSync, readFileSync } from 'node:fs';
+import { PRCommentManager } from './pr-comment-manager';
+import { PRCommentFormatter, CheckResult } from './pr-comment-formatter';
 
 const args = process.argv.slice(2);
 
@@ -13,13 +24,7 @@ const fileContents = existsSync(file)
 	? readFileSync(file, { encoding: 'utf8' }).split('\n')
 	: [];
 
-type Result = {
-	line: number;
-	column: number;
-	type: 'WARNING' | 'ERROR';
-	code: string;
-	message: string;
-};
+const fileResultsMap = new Map<string, CheckResult[]>();
 
 for (let i = 0; i < fileContents.length - 1; i++) {
 	const line = fileContents[i];
@@ -28,7 +33,9 @@ for (let i = 0; i < fileContents.length - 1; i++) {
 	}
 
 	const fileName = line.split('FILE: ')[1];
-	const results: Result[] = JSON.parse(fileContents[++i]) || [];
+	const results: CheckResult[] = JSON.parse(fileContents[++i]) || [];
+
+	fileResultsMap.set(fileName, results);
 
 	if (results.length > 0 && process.env.STRICT === 'true') {
 		process.exitCode = 1;
@@ -50,3 +57,41 @@ for (let i = 0; i < fileContents.length - 1; i++) {
 		});
 	}
 }
+
+async function postPRComment() {
+	startGroup('Posting PR comment');
+
+	try {
+		const token = getInput('repo-token') || process.env.INPUT_REPO_TOKEN;
+		const prNumber = context.payload.pull_request?.number;
+
+		if (!token) {
+			info('No GitHub token provided, skipping PR comment');
+			return;
+		}
+
+		if (!prNumber) {
+			info('Not a pull request, skipping PR comment');
+			return;
+		}
+
+		const manager = new PRCommentManager({
+			token,
+			owner: context.repo.owner,
+			repo: context.repo.repo,
+			prNumber,
+		});
+
+		const formatter = new PRCommentFormatter(fileResultsMap);
+
+		const commentBody = formatter.getComment();
+
+		await manager.postComment(commentBody);
+	} catch (err) {
+		error(`Failed to post PR comment: ${err}`);
+	}
+
+	endGroup();
+}
+
+postPRComment();