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`altertable app dev --file index.tsx` previews a single-file data app locally. The CLI reads the literal `defineDataApp` scope, refuses a profile mismatch, installs a pinned `@altertable/data-app` runtime under the config directory, and serves the file through the loopback lakehouse proxy with live reload. The preview server only accepts SQL from its own origin and host. Co-authored-by: Cursor <cursoragent@cursor.com>
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@francoischalifour it's a bit more code than I anticipated because with a single file we need to provide the runtime. But it works nicely! |
albert20260301
approved these changes
Oct 13, 2026
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What
Adds
altertable app dev --file index.tsx, which previews a single-file data app locally. This is the sameindex.tsxformat thatapp publishandapp validatealready accept.defineDataApp({ scope })from the file and refuses to start if it doesn't match the selected profile. The file goes throughBun.Transpilerfirst, so JSX, TypeScript and regex literals don't confuse the scope reader.@altertable/data-appruntime (the same version as the starter) under the config directory. Installation reuses the starter's frozen lockfile and is an offline no-op once installed./api/sqlonly accepts requests from the server's own origin (Origin andSec-Fetch-Sitechecks), and every route except the static page checks theHostheader to block DNS rebinding.--dirand--filecan't be combined.--portdefaults to 25837 for--file.Why
Single-file apps can be validated and published, but there was no way to iterate on one locally against the lakehouse before publishing.
Follow-up: the preview server and host page are generic and should eventually move into
@altertable/data-app(next toserveLocalApp), leaving the CLI with a thin launcher.Checklist
CHANGELOG.mdupdatedBREAKING CHANGE: …) and changelog (not a breaking change)./scripts/verify.shpasses locally. I also ran the preview server against the real@altertable/data-app0.68.0 package: the page and bundle load, valid same-origin SQL goes through, a request without an Origin header gets 403, and an invalid query gets 400.