Iss
983bd03131
## What
Adds per-variable secret support to the `syncEnvVars` build extension.
Return `{ name, value, isSecret: true }` and the variable is stored as a
secret (redacted in the dashboard, value non-revealable), just like a
manually created secret env var. Secret and non-secret variables can be
mixed in one callback.
```ts
syncEnvVars(async () => [
{ name: "PUBLIC_API_URL", value: "https://api.example.com" },
{ name: "DATABASE_URL", value: "postgres://...", isSecret: true },
]);
```
## How
Env vars flow through the build pipeline as a flat name→value map, and
the import API's `isSecret` is per-call. So secret vars are carried
through the layer + manifest in parallel `secretEnv` / `secretParentEnv`
maps, and at deploy time they go up in a second `importEnvVars` call
with `isSecret: true` (the plain vars in the first call). The record
form (`{ KEY: "value" }`) is unchanged and stays non-secret.
## Commits
- `feat(core)`: carry secret env vars through the build layer + manifest
schema
- `feat(build)`: partition `isSecret` vars in `syncEnvVars`
- `feat(cli)`: merge secret layers and import them with `isSecret: true`
at deploy
- `test(build)`: cover the partitioning + document `isSecret`
## Testing
- vitest covers the partitioning (secret/non-secret × child/parent) and
that the record form stays non-secret.
- Verified against a local webapp that the deploy's import contract
stores the secret var redacted (`isSecret: true`) and the plain var
visible.
Closes TRI-11099