ci: Add toolchain/components inputs to setup-rust

.github/actions/setup-rust/action.yml

@@ -1,16 +1,28 @@
 name: Setup Rust
 description: Sets up Rust
+inputs:
+  toolchain:
+    description: The Rust toolchain to use
+    required: false
+  components:
+    description: Comma-separated list of components to install
+    required: false
 
 runs:
   using: composite
   steps:
     - name: Install Rust
       uses: actions-rust-lang/setup-rust-toolchain@v1
       with:
-        components: clippy
+        # Empty string means rust-toolchain if it exists, otherwise stable
+        toolchain: ${{ inputs.toolchain }}
+        components: ${{ inputs.components }}
         cache: true
         # Do not override the RUSTFLAGS by default and instead do that per job,
         # if needed. Setting RUSTFLAGS via env var, config, etc. is mutually
         # exclusive and often a source of bugs.
         # Empty string here means no override.
         rustflags: ""
+        # By default, we do not override the toolchain from rust-toolchain.
+        # The user needs to explicitly use `<cmd> +<toolchain>` for clarity.
+        override: false

.github/workflows/edr-ci.yml

@@ -83,9 +83,14 @@ jobs:
     steps:
       - uses: actions/checkout@v3
       - uses: ./.github/actions/setup-rust
+        with:
+          components: clippy
 
       - name: Install nightly rustfmt
-        run: rustup toolchain install nightly --profile minimal --component rustfmt
+        uses: ./.github/actions/setup-rust
+        with:
+          toolchain: nightly
+          components: rustfmt
 
       - name: Run cargo fmt
         run: cargo +nightly fmt --all --check