Add cache-on-failure option to rust-cache in CI workflow steps

Author: AriajSarkar

.github/workflows/ci.yml

@@ -19,6 +19,9 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: rustfmt
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
       - name: Check formatting
         run: cargo fmt --all -- --check
 
@@ -30,6 +33,9 @@ jobs:
       - uses: dtolnay/rust-toolchain@stable
         with:
           components: clippy
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
       - name: Run clippy
         run: cargo clippy --all-features --all-targets -- -D warnings
 
@@ -45,6 +51,10 @@ jobs:
       - uses: dtolnay/rust-toolchain@master
         with:
           toolchain: ${{ matrix.rust }}
+      - uses: Swatinem/rust-cache@v2
+        with:
+          key: ${{ matrix.os }}-${{ matrix.rust }}
+          cache-on-failure: true
       - name: Run tests
         run: cargo test --all-features --verbose
       - name: Run doc tests
@@ -68,6 +78,9 @@ jobs:
       issues: write
     steps:
       - uses: actions/checkout@v4
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
       - uses: rustsec/audit-check@v1
         with:
           token: ${{ secrets.GITHUB_TOKEN }}
@@ -79,6 +92,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
       - name: Install tarpaulin
         run: cargo install cargo-tarpaulin
       - name: Generate coverage
@@ -95,6 +111,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
       - name: Build documentation
         run: cargo doc --all-features --no-deps
 
@@ -104,6 +123,9 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - uses: dtolnay/rust-toolchain@stable
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
       - name: Run examples
         run: |
           cargo run --example aead_example