feat: add setup-rust proxy action

.github/workflows/release.yml

@@ -84,6 +84,11 @@ jobs:
     if: inputs.action == 'setup-uv'
     uses: ./.github/workflows/test-setup-uv.yml
 
+  test-setup-rust:
+    needs: validate
+    if: inputs.action == 'setup-rust'
+    uses: ./.github/workflows/test-setup-rust.yml
+
   test-create-pull-request:
     needs: validate
     if: inputs.action == 'create-pull-request'
@@ -96,6 +101,7 @@ jobs:
       - test-setup-qemu
       - test-setup-buildx
       - test-setup-uv
+      - test-setup-rust
       - test-create-pull-request
     # Add one `needs.test-<action>.result == 'success'` clause per action; an action without a test job cannot be released.
     if: >-
@@ -104,6 +110,7 @@ jobs:
         needs.test-setup-qemu.result == 'success' ||
         needs.test-setup-buildx.result == 'success' ||
         needs.test-setup-uv.result == 'success' ||
+        needs.test-setup-rust.result == 'success' ||
         needs.test-create-pull-request.result == 'success'
       ) }}
     runs-on: ubuntu-slim

.github/workflows/test-setup-rust.yml

@@ -0,0 +1,50 @@
+---
+name: Test setup-rust
+
+on:
+  workflow_call: ~
+  pull_request:
+    paths:
+      - setup-rust/**
+      - .github/workflows/test-setup-rust.yml
+  push:
+    branches:
+      - main
+    paths:
+      - setup-rust/**
+      - .github/workflows/test-setup-rust.yml
+
+permissions:
+  contents: read
+
+jobs:
+  test:
+    strategy:
+      fail-fast: false
+      matrix:
+        os:
+          - ubuntu-latest
+          - ubuntu-slim
+          - macos-latest
+          - windows-latest
+    runs-on: ${{ matrix.os }}
+    steps:
+      - uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+
+      - name: Run action
+        id: rust
+        uses: ./setup-rust
+        with:
+          components: clippy, rustfmt
+
+      - name: Verify Rust
+        shell: bash
+        env:
+          NAME: ${{ steps.rust.outputs.name }}
+          CACHEKEY: ${{ steps.rust.outputs.cachekey }}
+        run: |
+          [ "$NAME" = "1.99.1" ]
+          [ -n "$CACHEKEY" ]
+          [ "$(rustc --version | cut -d' ' -f2)" = "$NAME" ]
+          cargo clippy --version
+          cargo fmt --version

README.md

@@ -97,6 +97,7 @@ Each action is referenced by its prefixed tag:
 | [setup-buildx](setup-buildx)               | Proxy for `docker/setup-buildx-action`           |
 | [setup-github-bot](setup-github-bot)       | Configure git to commit as `github-actions[bot]` |
 | [setup-qemu](setup-qemu)                   | Proxy for `docker/setup-qemu-action`             |
+| [setup-rust](setup-rust)                   | Proxy for `dtolnay/rust-toolchain`               |
 | [setup-uv](setup-uv)                       | Proxy for `astral-sh/setup-uv`                   |
 
 ## :heart: Contributing

setup-rust/README.md

@@ -0,0 +1,13 @@
+# setup-rust
+
+Proxy for [dtolnay/rust-toolchain](https://github.com/dtolnay/rust-toolchain), pinned to a commit SHA. Installs a Rust toolchain with rustup, plus optional targets and components.
+
+All inputs and outputs are forwarded unchanged, except for pinned defaults; see the upstream documentation for details.
+
+The `toolchain` input defaults to a pinned Rust release instead of `stable`; any rustup toolchain specification is still accepted (e.g. `stable`, `nightly`, `1.89`).
+
+## Usage
+
+```yaml
+- uses: techcode-io/github-actions/setup-rust@setup-rust/v1
+```

setup-rust/action.yml

@@ -0,0 +1,37 @@
+---
+name: Setup Rust
+description: Proxy for dtolnay/rust-toolchain
+
+inputs:
+  toolchain:
+    description: Rust toolchain specification -- see https://rust-lang.github.io/rustup/concepts/toolchains.html#toolchain-specification
+    default: 1.99.1
+  targets:
+    description: Comma-separated list of target triples to install for this toolchain
+    required: false
+  target:
+    description: Alias for `targets`
+    required: false
+  components:
+    description: Comma-separated list of components to be additionally installed
+    required: false
+
+outputs:
+  cachekey:
+    description: A short hash of the rustc version, appropriate for use as a cache key. "20220627a831"
+    value: ${{ steps.setup.outputs.cachekey }}
+  name:
+    description: Rustup's name for the selected version of the toolchain. "1.62.0"
+    value: ${{ steps.setup.outputs.name }}
+
+runs:
+  using: "composite"
+  steps:
+    - name: Setup Rust
+      id: setup
+      uses: dtolnay/rust-toolchain@683b588c487a69d01f6c6ddf40f036ff682cc2c8 # v1
+      with:
+        toolchain: ${{ inputs.toolchain }}
+        targets: ${{ inputs.targets }}
+        target: ${{ inputs.target }}
+        components: ${{ inputs.components }}