Set environment variables before running rust-cache

Show how the related rustfmt action can be used.

CHANGELOG.md

@@ -7,6 +7,13 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [1.2.1] - 2022-07-29
+
+### Fixed
+
+* Set environment variables before invoking the cache action.
+    This ensures restoring and saving are using the same cache key.
+
 ## [1.2.0] - 2022-07-21
 
 ### Added

README.md

@@ -24,6 +24,19 @@ jobs:
       - 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

action.yml

@@ -50,6 +50,19 @@ runs:
         targets: ${{inputs.target}}
         components: ${{inputs.components}}
       shell: bash
+    # The environment variables always need to be set before the caching action
+    - name: "Setting Environment Variables"
+      run: |
+        echo "CARGO_INCREMENTAL=0" >> $GITHUB_ENV
+        echo "CARGO_PROFILE_DEV_DEBUG=0" >> $GITHUB_ENV
+        echo "CARGO_TERM_COLOR=always" >> $GITHUB_ENV
+        echo "RUST_BACKTRACE=short" >> $GITHUB_ENV
+        echo "RUSTFLAGS=-D warnings" >> $GITHUB_ENV
+      shell: bash
+    - name: "Install Rust Problem Matcher"
+      run: echo "::add-matcher::${{ github.action_path }}/rust.json"
+      shell: bash
+
     - name: Install rustup, if needed
       run: |
         if ! command -v rustup &> /dev/null ; then
@@ -88,14 +101,3 @@ runs:
 
     - name: "Setup Rust Caching"
       uses: Swatinem/rust-cache@v2
-    - name: "Install Rust Problem Matcher"
-      run: echo "::add-matcher::${{ github.action_path }}/rust.json"
-      shell: bash
-    - name: "Setting Environment Variables"
-      run: |
-        echo "CARGO_INCREMENTAL=0" >> $GITHUB_ENV
-        echo "CARGO_PROFILE_DEV_DEBUG=0" >> $GITHUB_ENV
-        echo "CARGO_TERM_COLOR=always" >> $GITHUB_ENV
-        echo "RUST_BACKTRACE=short" >> $GITHUB_ENV
-        echo "RUSTFLAGS=-D warnings" >> $GITHUB_ENV
-      shell: bash