setup-rust-toolchain/README.md
Jonas Bushart 95a2f11bba Add README
2022-04-20 19:33:41 +00:00

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# Install Rust Toolchain
This GitHub Action installs a Rust toolchain using rustup.
It further integrates into the ecosystem.
Caching for Rust tools and build artifacts is enabled.
Environment variables are set to optimize the cache hits.
[Problem Matchers] are provided for build messages (cargo, clippy) and formatting (rustfmt).
The action is heavily inspired by *dtolnay*'s <https://github.com/dtolnay/rust-toolchain> and extends it with further features.
## Example workflow
```yaml
name: "Test Suite"
on:
push:
pull_request:
jobs:
test:
name: cargo test
runs-on: ubuntu-latest
steps:
- uses: actions/checkout@v3
- uses: actions-rust-lang/setup-rust-toolchain@v1
- run: cargo test --all-features
```
## Inputs
All inputs are optional.
| Name | Description | Default |
| ------------ | --------------------------------------------------------------------------------- | ------- |
| `toolchain` | Rustup toolchain specifier e.g. `stable`, `nightly`, `1.42.0`. | stable |
| `target` | Additional target support to install e.g. `wasm32-unknown-unknown` | |
| `components` | Comma-separated string of additional components to install e.g. `clippy, rustfmt` | |
## Outputs
| Name | Description |
| ---------------- | ----------------------------------------- |
| `rustc-version` | Version as reported by `rustc --version` |
| `cargo-version` | Version as reported by `cargo --version` |
| `rustup-version` | Version as reported by `rustup --version` |
## License
The scripts and documentation in this project are released under the [MIT
License].
[MIT License]: LICENSE
[Problem Matchers]: https://github.com/actions/toolkit/blob/main/docs/problem-matchers.md