Files
lancedb/nodejs/CONTRIBUTING.md
T
Xuanwo 8a4effa06a fix: gate experimental local functions behind an opt-in feature (#4688)
Published SDK builds currently expose local SQL computed columns and
materialized-view execution that are not ready for release. Add the
opt-in `experimental-functions` Cargo feature to the Rust core and
forward it through the Python and Node bindings; published packages
leave it disabled.

Local declarations and refreshes now return `NotSupported` before
mutating tables or spawning jobs, including prepared materialized-view
creation. Remote Cloud/Enterprise client operations, Python UDF
packaging, ordinary eager `add_columns`, and access to existing data
remain available. Stored metadata and write protections stay active, and
shared server commit helpers remain usable.

CI covers both feature configurations. Existing local execution tests
run with the feature enabled; default-build regressions cover early
rejection, unchanged table versions, existing metadata protections, and
normal eager transforms. API and source-build documentation explain the
opt-in.

Validation: Rust library tests pass with the feature disabled (1,869
tests) and enabled (1,947 tests), plus three default-build integration
regressions. Python and TypeScript bindings were rebuilt and tested in
both configurations, including mocked remote requests; Rust formatting,
Python package lint, TypeScript lint/build, and generated docs were
checked. Repository-wide Ruff still reports 48 pre-existing errors in
unchanged `docs/web-tests` files.
2026-10-27 14:32:09 +08:00

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2.3 KiB
Markdown

# Contributing to LanceDB Typescript
This document outlines the process for contributing to LanceDB Typescript.
For general contribution guidelines, see [CONTRIBUTING.md](https://github.com/lancedb/lancedb/blob/main/CONTRIBUTING.md).
## Project layout
The Typescript package is a wrapper around the Rust library, `lancedb`. We use
the [napi-rs](https://napi.rs/) library to create the bindings between Rust and
Typescript.
* `src/`: Rust bindings source code
* `lancedb/`: Typescript package source code
* `__test__/`: Unit tests
* `examples/`: A pnpm package with the examples shown in the documentation
## Development environment
To set up your development environment, you will need to install the following:
1. Node.js 22 or later (required by pnpm 11)
2. [pnpm](https://pnpm.io/installation) 11 or later (or run via `corepack enable`,
which uses the `packageManager` field in `package.json`)
3. Rust's package manager, Cargo. Use [rustup](https://rustup.rs/) to install.
4. [protoc](https://grpc.io/docs/protoc-installation/) (Protocol Buffers compiler)
Initial setup:
```shell
pnpm install
```
### Commit Hooks
It is **highly recommended** to install the [pre-commit](https://pre-commit.com/) hooks to ensure that your
code is formatted correctly and passes basic checks before committing:
```shell
pre-commit install
```
## Development
Most common development commands can be run using the pnpm scripts.
Build the package
```shell
pnpm install
pnpm build
```
Local SQL computed columns and materialized-view creation/refresh are experimental
and disabled in published packages. To opt in when building from this directory:
```shell
pnpm build:debug --features experimental-functions
pnpm tsc
pnpm test --runInBand table.test.ts materialized_view.test.ts
```
Rebuild without `--features experimental-functions` to test the default package.
The tests detect the compiled feature; remote operations, metadata protections,
and ordinary eager `addColumns` transforms remain available in both builds.
Lint:
```shell
pnpm lint
```
Format and fix lints:
```shell
pnpm lint-fix
```
Run tests:
```shell
pnpm test
```
To run a single test:
```shell
# Single file: table.test.ts
pnpm test -- table.test.ts
# Single test: 'merge insert' in table.test.ts
pnpm test -- table.test.ts --testNamePattern=merge\ insert
```