cache everything

.forgejo/workflows/build.yaml

@@ -14,6 +14,30 @@ jobs:
       - name: Checkout code
         uses: https://github.com/actions/checkout@v3
 
+      - name: Cache cargo registry
+        uses: https://github.com/actions/cache@v3
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+          key: cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: cargo-registry-
+
+      - name: Cache cargo build
+        uses: https://github.com/actions/cache@v3
+        with:
+          path: target
+          key: cargo-build-${{ hashFiles('**/Cargo.lock') }}
+          restore-keys: cargo-build-
+
+      # --- Cache apt packages ---
+      - name: Cache apt packages
+        uses: actions/cache@v3
+        with:
+          path: /var/cache/apt/archives
+          key: apt-${{ runner.os }}-${{ hashFiles('**/apt-packages.txt') }}
+          restore-keys: apt-${{ runner.os }}-
+
       - name: Install Rust
         uses: https://github.com/actions-rs/toolchain@v1
         with: