Merge pull request #1030 from preactjs/ci

CI: Add build pipeline

.github/workflows/ci.yml

@@ -0,0 +1,26 @@
+name: CI
+
+on:
+  push:
+    branches:
+      - master
+  pull_request:
+    branches:
+      - master
+
+jobs:
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-node@v4
+        with:
+          node-version-file: 'package.json'
+          cache: 'npm'
+          cache-dependency-path: '**/package-lock.json'
+      - run: npm ci
+      - run: npm run build
+        env:
+          NODE_OPTIONS: '--openssl-legacy-provider'

preact.config.js

@@ -88,7 +88,12 @@ export default function (config, env, helpers) {
 					const matches = content.match(FRONT_MATTER_REG);
 					if (!matches) return content;
 
-					const meta = yaml.parse('---\n' + matches[1].replace(/^/gm, '  ') + '\n') || {};
+					let meta;
+					try {
+						meta = yaml.parse('---\n' + matches[1].replace(/^/gm, '  ') + '\n') || {};
+					} catch (e) {
+						throw new Error(`Error parsing YAML FrontMatter in ${path}`);
+					}
 					content = content.replace(FRONT_MATTER_REG, '');
 					if (!meta.title) {
 						let [, title] = content.match(TITLE_REG) || [];