ci: replace grcov by cargo-llvm-cov to get coverage reports

Author: nymius

.github/workflows/coverage.yml

@@ -13,25 +13,18 @@ jobs:
     name: Code Coverage
     runs-on: ubuntu-latest
     env:
-      RUSTFLAGS: "-Cinstrument-coverage"
-      RUSTDOCFLAGS: "-Cinstrument-coverage"
-      LLVM_PROFILE_FILE: "./target/coverage/%p-%m.profraw"
-
+      CARGO_INCREMENTAL: 0
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-        with:
-          persist-credentials: false
       - name: Install Rust toolchain
         uses: dtolnay/rust-toolchain@v1
         with:
-            toolchain: stable
+            toolchain: nightly
             components: llvm-tools-preview
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2.7.8
-      - name: Install grcov
-        run: if [[ ! -e ~/.cargo/bin/grcov ]]; then cargo install grcov; fi
-      - name: Test
-        run: cargo test --all-features
-      - name: Run grcov
-        run: grcov . --binary-path ./target/debug/ -s . -t markdown --ignore-not-existing --excl-start "#\[cfg\(test\)\]" --excl-br-line "^\s*((debug_)?assert(_eq|_ne)?!|#\[derive\()" --excl-line "^\s*\S+\s*(=>)?\s*unreachable!.*" --ignore="**/example-crates/*" --ignore="**/tests/*" --ignore '/*' --ignore '**/examples/*'
+      - name: Install cargo-llvm-cov
+        run: if [[ ! -e ~/.cargo/bin/cargo-llvm-cov ]]; then cargo install cargo-llvm-cov; fi
+      - name: Test and report coverage
+        run: cargo +nightly llvm-cov -q --doctests --mcdc --workspace --ignore-filename-regex "example-crates/*"