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README.md

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+# Rust `cargo` Action
+
+This GitHub Action runs specified [`cargo`](https://github.com/rust-lang/cargo)
+command on a Rust language project.
+
+## Example workflow
+
+```yaml
+on: [push]
+
+name: CI
+
+jobs:
+  build_and_test:
+    name: Rust project
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+          toolchain: nightly
+          arguments: --release --all-features
+      - uses: actions-rs/cargo@v1
+        with:
+          command: test
+          toolchain: nightly
+          arguments: --all-targets
+```
+
+## Inputs
+
+* `command` (*required*) - Cargo command to run (ex. `check` or `build`)
+* `toolchain` - Rust toolchain to use (without the `+` sign, ex. `nightly`)
+* `args` - Arguments for the cargo command
+* `use-cross` - Use [cross](https://github.com/rust-embedded/cross) instead of cargo (default: `false`)