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allow disabling RUSTFLAGS config

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Jean Mertz 2023-05-19 12:00:54 +02:00 • committed by Jonas Bushart
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README.md
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@ -46,12 +46,26 @@ If a [toolchain file](https://rust-lang.github.io/rustup/overrides.html#the-tool
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 |
| 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
@ -68,3 +82,4 @@ 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