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napi-rs/README.md
LongYinan 1dc9974c19
feat(napi): implement detach arraybuffer
2020-10-11 22:26:09 +08:00

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# napi-rs
> This project was initialized from [xray](https://github.com/atom/xray)
A minimal library for building compiled `NodeJS` add-ons in `Rust`.
<p>
<a href="https://docs.rs/crate/napi"><img src="https://docs.rs/napi/badge.svg"></img></a>
<a href="https://crates.io/crates/napi"><img src="https://img.shields.io/crates/v/napi.svg"></img></a>
<a href="https://www.npmjs.com/package/napi-rs"><img src="https://img.shields.io/npm/v/napi-rs.svg"></img></a>
</p>
# Platform Support
![Lint](https://github.com/napi-rs/napi-rs/workflows/Lint/badge.svg)
![Linux-N-API-3](https://github.com/napi-rs/napi-rs/workflows/Linux-N-API-3/badge.svg)
![Linux-musl](https://github.com/napi-rs/napi-rs/workflows/Musl/badge.svg)
![macOS/Linux/Windows](https://github.com/napi-rs/napi-rs/workflows/Test/badge.svg)
## Operating Systems
| Linux | macOS | Windows x64 MSVC |
| ----- | ----- | ---------------- |
| ✓ | ✓ | ✓ |
## NodeJS
| Node10 | Node 12 | Node14 |
| ------ | ------- | ------ |
| ✓ | ✓ | ✓ |
This library depends on N-API and requires `Node@8.9` or later.
We already have some packages written by `napi-rs`: [node-rs](https://github.com/napi-rs/node-rs)
One nice feature is that this crate allows you to build add-ons purely with the `Rust` toolchain and without involving `node-gyp`.
## Taste
> You can start from [package-template](https://github.com/napi-rs/package-template) to play with `napi-rs`
### Define JavaScript functions
```rust
#[js_function(1)] // ------> arguments length, omit for zero
fn fibonacci(ctx: CallContext) -> Result<JsNumber> {
let n = ctx.get::<JsNumber>(0)?.try_into()?;
ctx.env.create_int64(fibonacci_native(n))
}
#[inline]
fn fibonacci_native(n: i64) -> i64 {
match n {
1 | 2 => 1,
_ => fibonacci_native(n - 1) + fibonacci_native(n - 2),
}
}
```
### Register module
```rust
/// test_module is Module name
register_module!(test_module, init);
/// Module is `module` object in NodeJS
fn init(module: &mut Module) -> Result<()> {
module.create_named_method("fibonacci", fibonacci)?;
}
```
## Building
This repository is a Cargo crate. Any napi-based add-on should contain `Cargo.toml` to make it a Cargo crate.
In your `Cargo.toml` you need to set the `crate-type` to `"cdylib"` so that cargo builds a C-style shared library that can be dynamically loaded by the Node executable. You'll also need to add this crate as a dependency.
```toml
[lib]
crate-type = ["cdylib"]
[dependencies]
napi = "0.5"
napi-derive = "0.5"
[build-dependencies]
napi-build = "0.2"
```
And create `build.rs` in your own project:
```rust
// build.rs
extern crate napi_build;
fn main() {
napi_build::setup();
}
```
So far, the `napi` build script has only been tested on `macOS` `Linux` and `Windows x64 MSVC`.
See the included [test_module](./test_module) for an example add-on.
Run `cargo build` to produce the `Dynamic lib` file. And install the `napi-rs` to help you copy `Dynamic lib` file to `.node` file in case you can `require` it in your program.
```json
{
"package": "your pkg",
"devDependencies": {
"napi-rs": "latest"
},
"scripts": {
"build": "cargo build && napi build",
"build-release": "cargo build --release && napi build --release"
}
}
```
Then you can require your native binding:
```js
require('./target/debug|release/[module_name].node')
```
The `module_name` would be your `package` name in your `Cargo.toml`.
`xxx => ./target/debug|release/xxx.node`
`xxx-yyy => ./target/debug|release/xxx_yyy.node`
You can also copy `Dynamic lib` file to an appointed location:
```bash
napi build [--release] .
napi build [--release] ./mylib
```
## Testing
Because libraries that depend on this crate must be loaded into a Node executable in order to resolve symbols, all tests are written in JavaScript in the `test_module` subdirectory.
To run tests:
```sh
yarn build:test
yarn test
```
## Features table
### Create JavaScript values
| NAPI | NAPI Version | Minimal Node version | Status |
| ------------------------------------------------------------------------------------------------------------ | ------------ | -------------------- | ------ |
| [napi_create_array](https://nodejs.org/api/n-api.html#n_api_napi_create_array) | 1 | v8.0.0 | ✅ |
| [napi_create_array_with_length](https://nodejs.org/api/n-api.html#n_api_napi_create_array_with_length) | 1 | v8.0.0 | ✅ |
| [napi_create_arraybuffer](https://nodejs.org/api/n-api.html#n_api_napi_create_arraybuffer) | 1 | v8.0.0 | ✅ |
| [napi_create_buffer](https://nodejs.org/api/n-api.html#n_api_napi_create_buffer) | 1 | v8.0.0 | ✅ |
| [napi_create_buffer_copy](https://nodejs.org/api/n-api.html#n_api_napi_create_buffer_copy) | 1 | v8.0.0 | ✅ |
| [napi_create_date](https://nodejs.org/api/n-api.html#n_api_napi_create_date) | 5 | v11.11.0 | ✅ |
| [napi_create_external](https://nodejs.org/api/n-api.html#n_api_napi_create_external) | 1 | v8.0.0 | ✅ |
| [napi_create_external_arraybuffer](https://nodejs.org/api/n-api.html#n_api_napi_create_external_arraybuffer) | 1 | v8.0.0 | ✅ |
| [napi_create_external_buffer](https://nodejs.org/api/n-api.html#n_api_napi_create_external_buffer) | 1 | v8.0.0 | ✅ |
| [napi_create_object](https://nodejs.org/api/n-api.html#n_api_napi_create_object) | 1 | v8.0.0 | ✅ |
| [napi_create_symbol](https://nodejs.org/api/n-api.html#n_api_napi_create_symbol) | 1 | v8.0.0 | ✅ |
| [napi_create_typedarray](https://nodejs.org/api/n-api.html#n_api_napi_create_typedarray) | 1 | v8.0.0 | ✅ |
| [napi_create_dataview](https://nodejs.org/api/n-api.html#n_api_napi_create_dataview) | 1 | v8.3.0 | ✅ |
| [napi_create_int32](https://nodejs.org/api/n-api.html#n_api_napi_create_int32) | 1 | v8.4.0 | ✅ |
| [napi_create_uint32](https://nodejs.org/api/n-api.html#n_api_napi_create_uint32) | 1 | v8.4.0 | ✅ |
| [napi_create_int64](https://nodejs.org/api/n-api.html#n_api_napi_create_int64) | 1 | v8.4.0 | ✅ |
| [napi_create_double](https://nodejs.org/api/n-api.html#n_api_napi_create_double) | 1 | v8.4.0 | ✅ |
| [napi_create_bigint_int64](https://nodejs.org/api/n-api.html#n_api_napi_create_bigint_int64) | 6 | v10.7.0 | ✅ |
| [napi_create_bigint_uint64](https://nodejs.org/api/n-api.html#n_api_napi_create_bigint_uint64) | 6 | v10.7.0 | ✅ |
| [napi_create_bigint_words](https://nodejs.org/api/n-api.html#n_api_napi_create_bigint_words) | 6 | v10.7.0 | ✅ |
| [napi_create_string_latin1](https://nodejs.org/api/n-api.html#n_api_napi_create_string_latin1) | 1 | v8.0.0 | ✅ |
| [napi_create_string_utf16](https://nodejs.org/api/n-api.html#n_api_napi_create_string_utf16) | 1 | v8.0.0 | ✅ |
| [napi_create_string_utf8](https://nodejs.org/api/n-api.html#n_api_napi_create_string_utf8) | 1 | v8.0.0 | ✅ |
### [Functions to convert from N-API to C types](https://nodejs.org/api/n-api.html#n_api_functions_to_convert_from_n_api_to_c_types)
| NAPI | NAPI Version | Minimal Node Version | Status |
| ---------------------------------------------------------------------------------------------------- | ------------ | -------------------- | ------ |
| [napi_get_array_length](https://nodejs.org/api/n-api.html#n_api_napi_get_array_length) | 1 | v8.0.0 | ✅ |
| [napi_get_arraybuffer_info](https://nodejs.org/api/n-api.html#n_api_napi_get_arraybuffer_info) | 1 | v8.0.0 | ✅ |
| [napi_get_buffer_info](https://nodejs.org/api/n-api.html#n_api_napi_get_buffer_info) | 1 | v8.0.0 | ✅ |
| [napi_get_prototype](https://nodejs.org/api/n-api.html#n_api_napi_get_prototype) | 1 | v8.0.0 | ✅ |
| [napi_get_typedarray_info](https://nodejs.org/api/n-api.html#n_api_napi_get_typedarray_info) | 1 | v8.0.0 | ✅ |
| [napi_get_dataview_info](https://nodejs.org/api/n-api.html#n_api_napi_get_dataview_info) | 1 | v8.3.0 | ✅ |
| [napi_get_date_value](https://nodejs.org/api/n-api.html#n_api_napi_get_date_value) | 5 | v11.11.0 | ✅ |
| [napi_get_value_bool](https://nodejs.org/api/n-api.html#n_api_napi_get_value_bool) | 1 | v8.0.0 | ✅ |
| [napi_get_value_double](https://nodejs.org/api/n-api.html#n_api_napi_get_value_double) | 1 | v8.0.0 | ✅ |
| [napi_get_value_bigint_int64](https://nodejs.org/api/n-api.html#n_api_napi_get_value_bigint_int64) | 6 | v10.7.0 | ✅ |
| [napi_get_value_bigint_uint64](https://nodejs.org/api/n-api.html#n_api_napi_get_value_bigint_uint64) | 6 | v10.7.0 | ✅ |
| [napi_get_value_bigint_words](https://nodejs.org/api/n-api.html#n_api_napi_get_value_bigint_words) | 6 | v10.7.0 | ✅ |
| [napi_get_value_external](https://nodejs.org/api/n-api.html#n_api_napi_get_value_external) | 1 | v8.0.0 | ✅ |
| [napi_get_value_int32](https://nodejs.org/api/n-api.html#n_api_napi_get_value_int32) | 1 | v8.0.0 | ✅ |
| [napi_get_value_int64](https://nodejs.org/api/n-api.html#n_api_napi_get_value_int64) | 1 | v8.0.0 | ✅ |
| [napi_get_value_string_latin1](https://nodejs.org/api/n-api.html#n_api_napi_get_value_string_latin1) | 1 | v8.0.0 | ✅ |
| [napi_get_value_string_utf8](https://nodejs.org/api/n-api.html#n_api_napi_get_value_string_utf8) | 1 | v8.0.0 | ✅ |
| [napi_get_value_string_utf16](https://nodejs.org/api/n-api.html#n_api_napi_get_value_string_utf16) | 1 | v8.0.0 | ✅ |
| [napi_get_value_uint32](https://nodejs.org/api/n-api.html#n_api_napi_get_value_uint32) | 1 | v8.0.0 | ✅ |
| [napi_get_boolean](https://nodejs.org/api/n-api.html#n_api_napi_get_boolean) | 1 | v8.0.0 | ✅ |
| [napi_get_global](https://nodejs.org/api/n-api.html#n_api_napi_get_global) | 1 | v8.0.0 | ✅ |
| [napi_get_null](https://nodejs.org/api/n-api.html#n_api_napi_get_null) | 1 | v8.0.0 | ✅ |
| [napi_get_undefined](https://nodejs.org/api/n-api.html#n_api_napi_get_undefined) | 1 | v8.0.0 | ✅ |
### [Working with JavaScript Values and Abstract Operations](https://nodejs.org/api/n-api.html#n_api_working_with_javascript_values_and_abstract_operations)
| NAPI | NAPI Version | Minimal Node Version | Status |
| ---------------------------------------------------------------------------------------------------- | ------------ | -------------------- | ------ |
| [napi_coerce_to_bool](https://nodejs.org/api/n-api.html#n_api_napi_coerce_to_bool) | 1 | v8.0.0 | ✅ |
| [napi_coerce_to_number](https://nodejs.org/api/n-api.html#n_api_napi_coerce_to_number) | 1 | v8.0.0 | ✅ |
| [napi_coerce_to_object](https://nodejs.org/api/n-api.html#n_api_napi_coerce_to_object) | 1 | v8.0.0 | ✅ |
| [napi_coerce_to_string](https://nodejs.org/api/n-api.html#n_api_napi_coerce_to_string) | 1 | v8.0.0 | ✅ |
| [napi_typeof](https://nodejs.org/api/n-api.html#n_api_napi_typeof) | 1 | v8.0.0 | ✅ |
| [napi_instanceof](https://nodejs.org/api/n-api.html#n_api_napi_instanceof) | 1 | v8.0.0 | ✅ |
| [napi_is_array](https://nodejs.org/api/n-api.html#n_api_napi_is_array) | 1 | v8.0.0 | ✅ |
| [napi_is_arraybuffer](https://nodejs.org/api/n-api.html#n_api_napi_is_arraybuffer) | 1 | v8.0.0 | ✅ |
| [napi_is_buffer](https://nodejs.org/api/n-api.html#n_api_napi_is_buffer) | 1 | v8.0.0 | ✅ |
| [napi_is_date](https://nodejs.org/api/n-api.html#n_api_napi_is_date) | 1 | v8.0.0 | ✅ |
| [napi_is_error](https://nodejs.org/api/n-api.html#n_api_napi_is_error_1) | 1 | v8.0.0 | ✅ |
| [napi_is_typedarray](https://nodejs.org/api/n-api.html#n_api_napi_is_typedarray) | 1 | v8.0.0 | ✅ |
| [napi_is_dataview](https://nodejs.org/api/n-api.html#n_api_napi_is_dataview) | 1 | v8.3.0 | ✅ |
| [napi_strict_equals](https://nodejs.org/api/n-api.html#n_api_napi_strict_equals) | 1 | v8.0.0 | ✅ |
| [napi_detach_arraybuffer](https://nodejs.org/api/n-api.html#n_api_napi_detach_arraybuffer) | 7 | v13.3.0 | ✅ |
| [napi_is_detached_arraybuffer](https://nodejs.org/api/n-api.html#n_api_napi_is_detached_arraybuffer) | 7 | v13.3.0 | ✅ |
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