feat(qa): record an agent walking a web or iOS app, then open it #54
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| Original file line number | Diff line number | Diff line change | ||||
|---|---|---|---|---|---|---|
| @@ -0,0 +1,176 @@ | ||||||
| /** | ||||||
| * Encode a JPEG frame directory into a playable recording, and open it. | ||||||
| * | ||||||
| * ffmpeg is optional. When it is missing or fails, we write a self-contained | ||||||
| * HTML player that steps through the frames at the captured fps so the user | ||||||
| * still gets something they can open. No Playwright, no CDP. | ||||||
| */ | ||||||
|
|
||||||
| import { spawnSync } from 'child_process'; | ||||||
| import * as fs from 'fs'; | ||||||
| import * as path from 'path'; | ||||||
| import { TEMP_DIR } from './platform'; | ||||||
|
|
||||||
| export const FRAME_PATTERN_JPG = 'frame_%06d.jpg'; | ||||||
| export const FRAME_PATTERN_PNG = 'frame_%06d.png'; | ||||||
|
|
||||||
| export interface EncodeResult { | ||||||
| artifactPath: string; | ||||||
| kind: 'mp4' | 'webm' | 'html'; | ||||||
| frameCount: number; | ||||||
| ffmpeg: boolean; | ||||||
| } | ||||||
|
|
||||||
| function listFrames(framesDir: string): { files: string[]; pattern: string } { | ||||||
| if (!fs.existsSync(framesDir)) return { files: [], pattern: FRAME_PATTERN_JPG }; | ||||||
| const names = fs.readdirSync(framesDir); | ||||||
| const jpgs = names.filter((f) => /^frame_\d{6}\.jpe?g$/i.test(f)).sort(); | ||||||
| if (jpgs.length) return { files: jpgs, pattern: FRAME_PATTERN_JPG }; | ||||||
| const pngs = names.filter((f) => /^frame_\d{6}\.png$/i.test(f)).sort(); | ||||||
| return { files: pngs, pattern: FRAME_PATTERN_PNG }; | ||||||
| } | ||||||
|
|
||||||
| /** True when `ffmpeg` is on PATH. Pure probe — never throws. */ | ||||||
| export function ffmpegAvailable(): boolean { | ||||||
| try { | ||||||
| const r = spawnSync('ffmpeg', ['-version'], { | ||||||
| stdio: 'ignore', | ||||||
| timeout: 4000, | ||||||
| windowsHide: true, | ||||||
| }); | ||||||
| return r.status === 0; | ||||||
| } catch { | ||||||
| return false; | ||||||
| } | ||||||
| } | ||||||
|
|
||||||
| function writeHtmlPlayer(framesDir: string, frames: string[], fps: number, dest: string): void { | ||||||
| const safeFps = Number.isFinite(fps) && fps > 0 ? fps : 8; | ||||||
| const relFrames = frames.map((f) => path.basename(f)); | ||||||
| const html = `<!DOCTYPE html> | ||||||
| <html lang="en"> | ||||||
| <head> | ||||||
| <meta charset="utf-8"> | ||||||
| <title>gstack recording</title> | ||||||
| <style> | ||||||
| body { margin: 0; background: #111; color: #eee; font: 14px/1.4 system-ui, sans-serif; } | ||||||
| main { max-width: 1100px; margin: 0 auto; padding: 16px; } | ||||||
| img { width: 100%; background: #000; display: block; } | ||||||
| .bar { display: flex; gap: 12px; align-items: center; margin-top: 12px; } | ||||||
| button { font: inherit; padding: 6px 12px; } | ||||||
| </style> | ||||||
| </head> | ||||||
| <body> | ||||||
| <main> | ||||||
| <img id="frame" alt="recording frame"> | ||||||
| <div class="bar"> | ||||||
| <button id="toggle" type="button">Pause</button> | ||||||
| <span id="meta"></span> | ||||||
| </div> | ||||||
| </main> | ||||||
| <script> | ||||||
| const frames = ${JSON.stringify(relFrames)}; | ||||||
| const fps = ${safeFps}; | ||||||
| let i = 0; | ||||||
| let playing = true; | ||||||
| const img = document.getElementById('frame'); | ||||||
| const meta = document.getElementById('meta'); | ||||||
| const toggle = document.getElementById('toggle'); | ||||||
| function show() { | ||||||
| if (!frames.length) { meta.textContent = 'No frames'; return; } | ||||||
| img.src = frames[i]; | ||||||
| meta.textContent = (i + 1) + ' / ' + frames.length + ' @ ' + fps + ' fps'; | ||||||
| } | ||||||
| function tick() { | ||||||
| if (!playing || frames.length === 0) return; | ||||||
| i = (i + 1) % frames.length; | ||||||
| show(); | ||||||
| } | ||||||
| toggle.addEventListener('click', () => { | ||||||
| playing = !playing; | ||||||
| toggle.textContent = playing ? 'Pause' : 'Play'; | ||||||
| }); | ||||||
| show(); | ||||||
| setInterval(tick, Math.max(20, Math.round(1000 / fps))); | ||||||
| </script> | ||||||
| </body> | ||||||
| </html> | ||||||
| `; | ||||||
| fs.writeFileSync(dest, html); | ||||||
| } | ||||||
|
|
||||||
| function runFfmpeg(framesDir: string, fps: number, outputPath: string, pattern: string): boolean { | ||||||
| const input = path.join(framesDir, pattern); | ||||||
| const attempts: string[][] = [ | ||||||
| ['-y', '-hide_banner', '-loglevel', 'error', '-framerate', String(fps), '-i', input, | ||||||
| '-c:v', 'libx264', '-pix_fmt', 'yuv420p', '-movflags', '+faststart', outputPath], | ||||||
| ['-y', '-hide_banner', '-loglevel', 'error', '-framerate', String(fps), '-i', input, | ||||||
| '-c:v', 'libvpx-vp9', '-pix_fmt', 'yuv420p', outputPath], | ||||||
| ]; | ||||||
| for (const args of attempts) { | ||||||
| try { | ||||||
| const r = spawnSync('ffmpeg', args, { | ||||||
| stdio: 'ignore', | ||||||
| timeout: 120_000, | ||||||
| windowsHide: true, | ||||||
| }); | ||||||
| if (r.status === 0 && fs.existsSync(outputPath) && fs.statSync(outputPath).size > 0) { | ||||||
| return true; | ||||||
| } | ||||||
| } catch { | ||||||
| // try next encoder | ||||||
| } | ||||||
| } | ||||||
| return false; | ||||||
| } | ||||||
|
|
||||||
| /** | ||||||
| * Turn numbered JPEG frames into a playable artifact next to `outputPath`. | ||||||
| * Prefers mp4 via ffmpeg; falls back to an HTML player in the frame directory. | ||||||
| */ | ||||||
| export function encodeFrameDirectory( | ||||||
| framesDir: string, | ||||||
| outputPath: string, | ||||||
| fps: number, | ||||||
| ): EncodeResult { | ||||||
| const { files: frames, pattern } = listFrames(framesDir); | ||||||
| if (frames.length === 0) { | ||||||
| throw new Error(`No recording frames in ${framesDir}`); | ||||||
| } | ||||||
|
|
||||||
| const ext = path.extname(outputPath).toLowerCase(); | ||||||
| const videoPath = ext === '.webm' || ext === '.mp4' ? outputPath : outputPath.replace(/\.[^.]+$/, '') + '.mp4'; | ||||||
|
|
||||||
| if (ffmpegAvailable() && runFfmpeg(framesDir, fps, videoPath, pattern)) { | ||||||
| const kind = path.extname(videoPath).toLowerCase() === '.webm' ? 'webm' : 'mp4'; | ||||||
| return { artifactPath: videoPath, kind, frameCount: frames.length, ffmpeg: true }; | ||||||
| } | ||||||
|
|
||||||
| const htmlPath = path.join(framesDir, 'player.html'); | ||||||
| writeHtmlPlayer(framesDir, frames, fps, htmlPath); | ||||||
| return { artifactPath: htmlPath, kind: 'html', frameCount: frames.length, ffmpeg: false }; | ||||||
| } | ||||||
|
|
||||||
| /** Open a file with the platform viewer. Best-effort; never throws. */ | ||||||
| export function openArtifact(filePath: string): boolean { | ||||||
| const resolved = path.resolve(filePath); | ||||||
| if (!fs.existsSync(resolved)) return false; | ||||||
| const cmd = | ||||||
| process.platform === 'darwin' ? ['open', resolved] | ||||||
| : process.platform === 'win32' ? ['cmd', '/c', 'start', '', resolved] | ||||||
| : ['xdg-open', resolved]; | ||||||
| try { | ||||||
| const r = spawnSync(cmd[0], cmd.slice(1), { | ||||||
| stdio: 'ignore', | ||||||
| timeout: 8000, | ||||||
| windowsHide: true, | ||||||
| }); | ||||||
| return r.status === 0; | ||||||
| } catch { | ||||||
| return false; | ||||||
| } | ||||||
| } | ||||||
|
|
||||||
| export function defaultRecordingPath(stamp = Date.now()): string { | ||||||
| return path.join(TEMP_DIR, `gstack-recording-${stamp}.mp4`); | ||||||
|
There was a problem hiding this comment. P2: Prompt for AI agents
Suggested change
|
||||||
| } | ||||||
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P2: When
record startreceives an extensionless path inside a dot-named directory, this regex treats the directory as the extension and writes the MP4 elsewhere. Derive the extension frompath.parse(outputPath)or the basename instead.Prompt for AI agents