85 lines
3.5 KiB
Markdown
85 lines
3.5 KiB
Markdown
# 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
|
|
|
|
# Check formatting with rustfmt
|
|
formatting:
|
|
name: cargo fmt
|
|
runs-on: ubuntu-latest
|
|
steps:
|
|
- uses: actions/checkout@v3
|
|
# Ensure rustfmt is installed and setup problem matcher
|
|
- uses: actions-rust-lang/setup-rust-toolchain@v1
|
|
with:
|
|
components: rustfmt
|
|
- name: Rustfmt Check
|
|
uses: actions-rust-lang/rustfmt@v1
|
|
```
|
|
|
|
## Inputs
|
|
|
|
All inputs are optional.
|
|
If a [toolchain file](https://rust-lang.github.io/rustup/overrides.html#the-toolchain-file) (i.e., `rust-toolchain` or `rust-toolchain.toml`) is found in the root of the repository, its `toolchain` value takes precedence.
|
|
First, all items specified in the toolchain file are installed.
|
|
Afterward, the `components` and `target` specified via inputs are installed in addition to the items from the toolchain file.
|
|
|
|
| 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` | |
|
|
| `cache` | Automatically configure Rust cache (using `Swatinem/rust-cache`) | true |
|
|
| `rustflags` | Set the value of `RUSTFLAGS` (set to empty string to avoid overwriting existing flags) | "-D warnings" |
|
|
|
|
### RUSTFLAGS
|
|
|
|
By default, this action sets the `RUSTFLAGS` environment variable to `-D warnings`.
|
|
|
|
However, rustflags sources are mutually exclusive, so setting this environment
|
|
variable omits any configuration through `target.*.rustflags` or
|
|
`build.rustflags`.
|
|
|
|
To prevent this from happening, set the `rustflags` input to an empty string, which will
|
|
prevent the action from setting `RUSTFLAGS` at all, keeping any existing preferences.
|
|
|
|
You can read more rustflags, and their load order, in the [Cargo reference].
|
|
|
|
## 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
|
|
[Cargo reference]: https://doc.rust-lang.org/cargo/reference/config.html?highlight=unknown#buildrustflags |