Files
rdbms-playground/website/casts-src/generate.mjs
T
claude@clouddev1 fbf449f9e0 feat(website): asciinema cast pipeline + landing quickstart demo
Settle the cast toolchain (STYLE.md #9) and build the demo pipeline end to
end. Driver: autocast, chosen by spike — its !Interactive feeds keys to the
running TUI and captures the redraw, the right model for a full-screen
crossterm app. asciinema-automation was rejected (assumes shell echo/\n Enter;
produced a garbled cast against the TUI).

- add asciinema-player; Cast.astro (player island) + Demo.astro (the WASM-swap
  seam, ADR-website-001 §3)
- casts-src/: human-readable command-lists (casts.mjs) + generate.mjs, exposed
  as `pnpm casts`; expands steps to autocast YAML and records to public/casts/.
  Command-lists are the durable source; .cast files are regenerable (final
  re-record sweep due once the app is locked).
- quickstart.cast (create -> add columns -> insert -> show data) embedded on
  the landing page above the feature cards.

Verified: pnpm build clean (25 pages); player + cast bundled and served;
landing HTML references the cast. Visual playback check pending (no headless
browser here — verify via dev server over the tunnel).
2026-06-10 12:59:50 +00:00

122 lines
3.9 KiB
JavaScript

#!/usr/bin/env node
/**
* generate.mjs — turn the cast definitions in `casts.mjs` into asciinema
* `.cast` recordings under `public/casts/`, using autocast (ADR-website-001
* §2; driver chosen by the 2026-06-10 spike — autocast drives the full-screen
* TUI correctly, asciinema-automation does not).
*
* Usage:
* pnpm casts # regenerate every cast
* pnpm casts quickstart # regenerate just one
*
* Requires `autocast` on PATH (cargo install autocast) and a built
* `rdbms-playground` binary at ../target/debug (run `cargo build` at the repo
* root first). The binary's dir is added to PATH for the autocast child so the
* recording shows a clean `$ rdbms-playground` launch line.
*/
import { spawnSync } from 'node:child_process';
import { mkdirSync, writeFileSync, rmSync } from 'node:fs';
import { dirname, resolve } from 'node:path';
import { fileURLToPath } from 'node:url';
import os from 'node:os';
import { casts } from './casts.mjs';
const here = dirname(fileURLToPath(import.meta.url));
const websiteRoot = resolve(here, '..');
const repoRoot = resolve(websiteRoot, '..');
const binDir = resolve(repoRoot, 'target', 'debug');
const outDir = resolve(websiteRoot, 'public', 'casts');
const cargoBin = resolve(os.homedir(), '.cargo', 'bin');
/** YAML-escape a single character for a double-quoted scalar. */
function charKey(ch) {
if (ch === '\\') return '"\\\\"';
if (ch === '"') return '"\\""';
return `"${ch}"`;
}
/** Named single keys → autocast control codes. */
const NAMED_KEYS = {
Enter: '^M',
Tab: '^I',
};
/** Build the autocast `keys:` list (one entry per line) for a cast's steps. */
function keysFor(steps) {
const keys = [];
for (const step of steps) {
if (step.wait != null) {
keys.push(`${step.wait}ms`);
continue;
}
if (step.key != null) {
const code = NAMED_KEYS[step.key];
if (!code) throw new Error(`unknown key: ${step.key}`);
keys.push(code);
if (step.after != null) keys.push(`${step.after}ms`);
continue;
}
if (step.type != null) {
for (const ch of step.type) keys.push(charKey(ch));
if (step.enter !== false) keys.push('^M'); // Enter = CR (the TUI submits on \r)
if (step.after != null) keys.push(`${step.after}ms`);
continue;
}
throw new Error(`unrecognised step: ${JSON.stringify(step)}`);
}
return keys;
}
function yamlFor(cast) {
const keys = keysFor(cast.steps)
.map((k) => ` - ${k}`)
.join('\n');
return [
'settings:',
` width: ${cast.width ?? 90}`,
` height: ${cast.height ?? 26}`,
` title: ${JSON.stringify(cast.title ?? cast.name)}`,
` type_speed: ${cast.typeSpeed ?? '45ms'}`,
' timeout: 90s',
' prompt: "$ "',
'instructions:',
' - !Interactive',
' command: rdbms-playground',
' keys:',
keys,
'',
].join('\n');
}
const only = process.argv[2];
const selected = only ? casts.filter((c) => c.name === only) : casts;
if (only && selected.length === 0) {
console.error(`no cast named "${only}". Known: ${casts.map((c) => c.name).join(', ')}`);
process.exit(1);
}
mkdirSync(outDir, { recursive: true });
const env = { ...process.env, PATH: `${binDir}:${cargoBin}:${process.env.PATH}` };
let failures = 0;
for (const cast of selected) {
const yamlPath = resolve(os.tmpdir(), `autocast-${cast.name}.yaml`);
const outPath = resolve(outDir, `${cast.name}.cast`);
writeFileSync(yamlPath, yamlFor(cast));
console.log(`▶ recording ${cast.name} → public/casts/${cast.name}.cast`);
const res = spawnSync('autocast', ['--overwrite', yamlPath, outPath], {
env,
stdio: 'inherit',
});
rmSync(yamlPath, { force: true });
if (res.status !== 0) {
console.error(`${cast.name} failed (autocast exit ${res.status})`);
failures += 1;
} else {
console.log(`${cast.name}`);
}
}
if (failures) process.exit(1);
console.log(`Done — ${selected.length} cast(s).`);