# cargo-xwin

_formerly cargo-xwinbuild_

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Cross compile Cargo project to Windows msvc target with ease.

**By using this software you are consented to accept the license at [https://go.microsoft.com/fwlink/?LinkId=2086102](https://go.microsoft.com/fwlink/?LinkId=2086102)**

## Prerequisite

1. For pure Rust project, no prerequisites needed.
2. For C/C++ dependencies, install [clang](https://clang.llvm.org/) (On macOS run `brew install llvm` and you're good to go).
3. For assembly dependencies, install `llvm-tools-preview` component via `rustup component add llvm-tools-preview` or install [llvm](https://llvm.org).

## Installation

```bash
cargo install cargo-xwin
```

You can also install it using pip:

```bash
pip install cargo-xwin
```

We also provide a [Docker image](https://hub.docker.com/r/messense/cargo-xwin) which has wine pre-installed in addition to cargo-xwin and Rust,
for example to build for x86_64 Windows:

```bash
docker run --rm -it -v $(pwd):/io -w /io messense/cargo-xwin \
  cargo xwin build --release --target x86_64-pc-windows-msvc
```

## Usage

1. Install Rust Windows msvc target via rustup, for example, `rustup target add x86_64-pc-windows-msvc`
2. Run `cargo xwin build`, for example, `cargo xwin build --target x86_64-pc-windows-msvc`

### Run tests with wine

With wine installed, you can run tests with the `cargo xwin test` command,
for example, `cargo xwin test --target x86_64-pc-windows-msvc`

### Customization

The Microsoft CRT and Windows SDK can be customized using the following environment variables or CLI options.

| Environment Variable      | CLI option                  | Description                                                                                                        |
| ------------------------- | --------------------------- | ------------------------------------------------------------------------------------------------------------------ |
| `XWIN_ARCH`               | `--xwin-arch`               | The architectures to include, defaults to `x86_64,aarch64`, possible values: x86, x86_64, aarch, aarch64           |
| `XWIN_VARIANT`            | `--xwin-variant`            | The variants to include, defaults to `desktop`, possible values: desktop, onecore, spectre                         |
| `XWIN_VERSION`            | `--xwin-version`            | The version to retrieve, defaults to 16, can either be a major version of 15 or 16, or a `<major>.<minor>` version |
| `XWIN_CACHE_DIR`          | `--xwin-cache-dir`          | xwin cache directory to put CRT and SDK files                                                                      |
| `XWIN_INCLUDE_DEBUG_LIBS` | `--xwin-include-debug-libs` | Whether or not to include debug libs in installation (default false).                                              |

### CMake Support

Some Rust crates use the [cmake](https://github.com/alexcrichton/cmake-rs) crate to build C/C++ dependencies,
cargo-xwin will generate a [CMake toolchain](https://cmake.org/cmake/help/latest/manual/cmake-toolchains.7.html) file
automatically to make cross compilation work out of the box.

**[ninja](https://ninja-build.org/) is required** to enable CMake support.

## License

This work is released under the MIT license. A copy of the license is provided
in the [LICENSE](./LICENSE) file.
