Source-based coverage (#416)

* tweaks for grcov

* github action instead of run command

* branch name

* no branch name anymore

.github/workflows/coveralls.yml

@@ -26,6 +26,8 @@ jobs:
         run: python -m pip install --upgrade pip setuptools wheel
       - name: Set up OpenSK
         run: ./setup.sh
+      - name: Install llvm tools
+        run: rustup component add llvm-tools-preview
 
       - name: Install grcov
         run: if [[ ! -e ~/.cargo/bin/grcov ]]; then cargo +stable install grcov; fi
@@ -34,14 +36,13 @@ jobs:
           command: test
           args: --features "with_ctap1,with_nfc,std" --no-fail-fast
         env:
-          CARGO_INCREMENTAL: '0'
-          RUSTFLAGS: '-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests'
-          RUSTDOCFLAGS: '-Zprofile -Ccodegen-units=1 -Cinline-threshold=0 -Coverflow-checks=off -Cpanic=abort -Zpanic_abort_tests'
-      - uses: actions-rs/grcov@v0.1.5
-        id: coverage
+          RUSTFLAGS: "-Zinstrument-coverage"
+          LLVM_PROFILE_FILE: "opensk-%p-%m.profraw"
+      - name: Run grcov
+        run: grcov . --binary-path ./target/debug/ --source-dir . --output-type lcov --ignore-not-existing ---output-path ./lcov.info --ignore "/*" --ignore "examples/*" --ignore "third_party/*"
       - uses: coverallsapp/github-action@1.1.3
         name: upload report to coveralls
         with:
           github-token: ${{ secrets.GITHUB_TOKEN }}
-          path-to-lcov: ${{ steps.coverage.outputs.report }}
+          path-to-lcov: "./lcov.info"