devops: caching & improvements

.github/workflows/rust.yml

@@ -11,12 +11,32 @@ env:
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
-    - name: Build
-      run: cargo build --verbose
-    - name: Run tests
-      run: cargo test --all --verbose
+      - name: Check out 🚚
+        uses: actions/checkout@v3
+
+      - name:  Install latest stable Rust toolchain 🦀
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: stable
+          override: true
+          default: true
+      - name: Set up cargo cache 📦
+        uses: actions/cache@v3
+        continue-on-error: false
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/            
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: ${{ runner.os }}-cargo-
+      - name: Build 🔨
+        run: cargo build --verbose
+      - name: Run tests 🚀
+        run: cargo test --all --verbose