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Break down the size of a Scala Native binary

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// repository documentation

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# Break down the size of a native binary

**Installation methods**: 
- download the binary for your system from [Releases](https://github.com/indoorvivants/sn-sizemap/releases/latest)
- use [coursier](https://get-coursier.io/): `cs install sn-sizemap --contrib`

```
$ sn-sizemap serve test-binary
Starting server on http://localhost:52616
```

When you navigate to the page, you will be greeted with an interactive dashboard allowing to drill down into the various packages and their sizes.

At the moment, only MacOS and Linux  binaries are supported, to support Windows we need a brave volunteer.

- [Break down the size of a Scala Native binary](#break-down-the-size-of-a-scala-native-binary)
  - [Contributing](#contributing)
    - [Building CLI](#building-cli)
    - [Working on frontend](#working-on-frontend)
    - [Working on CLI/backend](#working-on-clibackend)

## Contributing

This is an sbt project with two modules:

- `cli` - a Scala Native CLI that analyses the binary and starts and embedded HTTP server which serves a web frontend to explore the binary.

- `frontend` - a Scala.js single-page application, using Vite as bundler and dev server

### Building CLI

The frontend and the backend need to be built in strict order.

Run `frontendBuild; buildBinaryDebug` and `./out/debug/sn-sizemap` binary will be produced with latest version of the frontend embedded in the CLI itself.

If you want to build a release version, run `frontendBuild; buildBinaryRelease`.

For convenience, these commands are provided:

- `debugBuild`
- `releaseBuild`
- `debugPlatformBuild`
- `releasePlatformBuild`

The project is structured to allow working on frontend and CLI independently.

### Working on frontend

1. First, start the CLI server – for simplicity, we provide a `serveItself` sbt task - it will launch the server on port 8899 analysing the CLI's binary itself
2. Then, run `frontend/reStart` - this will start Vite's dev server, connecting to the backend on port 8899
3. Run `~fastLinkJS` to automatically rebuild the Scala.js frontend on each change

To produce an optimised bundle, run `frontendBuild` - it will place the fully static bundle in `frontend/dist` folder.

### Working on CLI/backend

`serveItself` task will automatically rebuild the CLI and restart the server every 
time you run it.

Alternatively, run `cli/reStart <args>` to launch it with different parameters.

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