Collect and upload code coverage when executing unit tests

.github/workflows/ci.yml

@@ -80,6 +80,8 @@ jobs:
           RUSTFLAGS="-D warnings" cargo check --release
 
   unit-test:
+    permissions:
+      pull-requests: write
     runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@v4
@@ -93,13 +95,70 @@ jobs:
         uses: actions-rs/toolchain@v1
         with:
           toolchain: ${{ env.RUSTC_VERSION }}
+          components: llvm-tools-preview
           profile: minimal
           override: true
       - uses: Swatinem/rust-cache@v2
 
-      - name: Run cargo test
-        uses: actions-rs/cargo@v1
+      - name: Install cargo-llvm-cov
+        uses: taiki-e/install-action@v2.27.14
+        with:
+          tool: cargo-llvm-cov
+
+      - name: Execute tests
+        id: coverage
         env:
           CRUNCH_CONFIG_FILENAME: environments/cc3/testnet/.env
+        run: |
+          PR_NUMBER=$(echo "$GITHUB_REF" | sed "s|refs/pull/||" | sed "s|/merge||")
+          DESTINATION_PATH="crunch/PR-$PR_NUMBER"
+          export DESTINATION_PATH
+          echo "**For full LLVM coverage report [click here](https://staticsitellvmhtml.z13.web.core.windows.net/$DESTINATION_PATH/html/)!**" > uncovered-lines.log
+
+          cargo llvm-cov --workspace --html --show-missing-lines \
+              --hide-instantiations --ignore-filename-regex "(tests.rs|mock.rs)"
+
+          UNCOVERED_LINES=$(sed "s|$(pwd)|.|" uncovered-lines.log)
+          # workaround the fact that GitHub Actions doesn't support multi-line output
+          # https://trstringer.com/github-actions-multiline-strings/
+          UNCOVERED_LINES="${UNCOVERED_LINES//'%'/'%25'}"
+          UNCOVERED_LINES="${UNCOVERED_LINES//$'\n'/'%0A'}"
+          UNCOVERED_LINES="${UNCOVERED_LINES//$'\r'/'%0D'}"
+          echo "uncovered_lines=$UNCOVERED_LINES" >> "$GITHUB_OUTPUT"
+
+      - name: Azure login
+        if: env.GITHUB_TOKEN
+        env:
+          GITHUB_TOKEN: ${{ secrets.CREDITCOIN_GITHUB_API_TOKEN }}
+        uses: azure/login@v1
+        with:
+          creds: ${{ secrets.AZURE_CREDENTIALS }}
+          allow-no-subscriptions: true
+
+      - name: Upload coverage report to Azure Storage
+        if: env.GITHUB_TOKEN
+        env:
+          GITHUB_TOKEN: ${{ secrets.CREDITCOIN_GITHUB_API_TOKEN }}
+        run: |
+          AZURE_STORAGE_KEY=${{ secrets.LLVM_AZURE_STORAGE_KEY }}
+          export AZURE_STORAGE_KEY
+          PR_NUMBER=$(echo "$GITHUB_REF" | sed "s|refs/pull/||" | sed "s|/merge||")
+          DESTINATION_PATH="crunch/PR-$PR_NUMBER"
+          export DESTINATION_PATH
+
+          az storage blob upload-batch --account-name staticsitellvmhtml --auth-mode key -d "\$web" --destination-path "$DESTINATION_PATH" --overwrite -s ./target/llvm-cov
+
+      - name: Post comment to PR
+        if: env.GITHUB_TOKEN
+        uses: mshick/add-pr-comment@v2
+        env:
+          GITHUB_TOKEN: ${{ secrets.CREDITCOIN_GITHUB_API_TOKEN }}
+        with:
+          message: ${{ steps.coverage.outputs.uncovered_lines }}
+          allow-repeats: false
+
+      - name: Upload coverage report as artifact
+        uses: actions/upload-artifact@v4
         with:
-          command: test
+          name: coverage-report
+          path: target/llvm-cov/html/

.lycheeignore

@@ -0,0 +1 @@
+staticsitellvmhtml.z13.web.core.windows.net