packages/scanner/README.md
# scanner
This project was bootstrapped by [create-neon](https://www.npmjs.com/package/create-neon).
## Building scanner
If you only want to run the build, run:
```sh
$ npm run build
```
This command uses the [cargo-cp-artifact](https://github.com/neon-bindings/cargo-cp-artifact) utility to run the Rust build and copy the built library into `./index.node`.
## Available Scripts
In the project directory, you can run:
### `npm run build`
Builds the Node addon (`index.node`) from source.
Additional [`cargo build`](https://doc.rust-lang.org/cargo/commands/cargo-build.html) arguments may be passed to the `npm build` command. For example, to enable a [cargo feature](https://doc.rust-lang.org/cargo/reference/features.html):
```
npm run build -- --feature=beetle
```
#### `npm run build-debug`
Alias for `npm build`.
#### `npm run build-release`
Same as [`npm build`](#npm-build) but, builds the module with the [`release`](https://doc.rust-lang.org/cargo/reference/profiles.html#release) profile. Release builds will compile slower, but run faster.
#### `npm run build-macos` and `npm run build-macos-arm64`
Builds the module for macOS. The `build-macos` script builds for the x86_64 architecture, while `build-macos-arm64` builds for the Apple Silicon architecture.
### `npm test`
Runs the unit tests by calling `cargo test`. You can learn more about [adding tests to your Rust code](https://doc.rust-lang.org/book/ch11-01-writing-tests.html) from the [Rust book](https://doc.rust-lang.org/book/).
## Project Layout
The directory structure of this project is:
```
scanner/
├── Cargo.toml
├── README.md
├── index.node
├── package.json
├── src/
| └── lib.rs
└── target/
```
### Cargo.toml
The Cargo [manifest file](https://doc.rust-lang.org/cargo/reference/manifest.html), which informs the `cargo` command.
### README.md
This file.
### index.node
The Node addon—i.e., a binary Node module—generated by building the project. This is the main module for this package, as dictated by the `"main"` key in `package.json`.
Under the hood, a [Node addon](https://nodejs.org/api/addons.html) is a [dynamically-linked shared object](https://en.wikipedia.org/wiki/Library_(computing)#Shared_libraries). The `"build"` script produces this file by copying it from within the `target/` directory, which is where the Rust build produces the shared object.
### package.json
The npm [manifest file](https://docs.npmjs.com/cli/v7/configuring-npm/package-json), which informs the `npm` command.
### src/
The directory tree containing the Rust source code for the project.
### src/lib.rs
The Rust library's main module.
### target/
Binary artifacts generated by the Rust build.
## Learn More
To learn more about Neon, see the [Neon documentation](https://neon-bindings.com).
To learn more about Rust, see the [Rust documentation](https://www.rust-lang.org).
To learn more about Node, see the [Node documentation](https://nodejs.org).