Files
ai-for-dummies/.agents/scripts/visual-regression.mjs
Marcos Paulo 48c31dc1b3 build: migrate from npm to pnpm
Ten git worktrees each carried their own 225 MB node_modules (1.1 GB across
five) and paid 11s per `npm ci`. pnpm hardlinks from a shared store: the same
five worktrees cost ~250 MB total, and a fresh install is 4s.

What changed beyond the mechanical rename:

- `overrides` moved to `pnpm-workspace.yaml`. pnpm 11 does not read the `pnpm`
  field in package.json *or* npm's top-level `overrides`, and it fails silently
  — the vite/defu/language-server pins would have quietly stopped applying.
- Build scripts are blocked by default in pnpm; esbuild and sharp are allowed
  explicitly via `allowBuilds` (renamed from `onlyBuiltDependencies` in 11).
- `packageManager` + `engines` pin the toolchain.
- gate.sh rejects a package-lock.json/yarn.lock/bun.lock outright, so an agent
  running `npm install` out of habit fails loudly instead of building a second,
  divergent dependency tree.
- CI bootstraps pnpm with `npm install --global pnpm@11.25.0` rather than
  corepack (unbundled as of Node 25) or pnpm/action-setup (this self-hosted
  act-runner has never run a job; fetching a third-party action is not
  something to discover on the first one).

Two pre-existing CI bugs fixed while in the file:

- the gate installed with `npm install --package-lock=false`, which discarded
  the lockfile the previous session had just fixed.
- the visual-regression step imported `playwright`, which is not a dependency,
  and `visual-regression.mjs` has no compare mode anyway — in CI it overwrote
  its own baselines and passed unconditionally. Removed with a comment; it
  comes back when it can diff.

The `publish` job is now manual (`workflow_dispatch`). During the migration
dist/ holds three HTML files against the live pages branch's ten, so publishing
on every push to main would take the site down to a stub. Restore at task 20.

HANDOVER.md's incident log still says npm where it describes what happened at
the time; that is history, not a missed rename.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
2026-09-05 04:29:42 +00:00

59 lines
1.9 KiB
JavaScript

#!/usr/bin/env node
// Keep vanilla screenshots before a page changes; compare them against the
// migrated preview when a visual diff needs investigation.
import { mkdirSync } from 'node:fs';
const routes = [
'/',
'/full-guide/',
'/summary/',
'/models/',
'/agents/',
'/skills/',
'/rules/',
'/skills-review/',
'/hands-on/starter/',
'/hands-on/rules/',
];
const widths = [560, 800, 1100, 1600];
const hasReducedMotion = process.argv.includes('--reduced-motion');
const base = process.env.VISUAL_BASE_URL ?? 'http://localhost:4173';
const output =
process.env.VISUAL_OUTPUT_DIR ??
`.agents/snapshots/${hasReducedMotion ? 'before-reduced-motion' : 'before'}`;
mkdirSync(output, { recursive: true });
let chromium;
try {
({ chromium } = await import('playwright'));
} catch {
throw new Error(
'visual regression requires Playwright; install its project dependency and run pnpm exec playwright install chromium',
);
}
const browser = await chromium.launch({
headless: true,
...(process.env.VISUAL_BROWSER_PATH ? { executablePath: process.env.VISUAL_BROWSER_PATH } : {}),
});
try {
for (const route of routes) {
for (const width of widths) {
const page = await browser.newPage({ viewport: { width, height: 900 } });
if (hasReducedMotion) await page.emulateMedia({ reducedMotion: 'reduce' });
// The legacy site intentionally calls optional services that may be down;
// visual capture is about the rendered page, not their network lifetime.
await page.goto(new URL(route, base).toString(), { waitUntil: 'domcontentloaded' });
const name = route.replace(/^\/+|\/+$/g, '').replaceAll('/', '_') || 'index';
await page.screenshot({ path: `${output}/${name}-${width}.png`, fullPage: true });
await page.close();
}
}
} finally {
await browser.close();
}
console.log(`captured ${routes.length * widths.length} screenshots in ${output}`);