ci: Add coverage.yml workflow

Author: ValuedMammal

.github/workflows/coverage.yml

@@ -0,0 +1,55 @@
+name: Code Coverage
+
+on:
+  push:
+    branches: [
+      "master",
+      "test_ci"
+    ]
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  coverage:
+    name: Code Coverage
+    runs-on: ubuntu-latest
+    env:
+      RUSTFLAGS: "-Cinstrument-coverage"
+      RUSTDOCFLAGS: "-Cinstrument-coverage"
+      LLVM_PROFILE_FILE: "./target/coverage/%p-%m.profraw"
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          persist-credentials: false
+      - name: Install lcov tools
+        run: sudo apt-get install lcov -y
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@v1
+        with:
+            toolchain: stable
+            components: llvm-tools-preview
+      - name: Rust Cache
+        uses: Swatinem/[email protected]
+      - name: Install grcov
+        run: if [[ ! -e ~/.cargo/bin/grcov ]]; then cargo install grcov; fi
+      - name: Test
+        run: cargo test --all-features
+      - name: Make coverage directory
+        run: mkdir coverage
+      - name: Run grcov
+        run: grcov . --binary-path ./target/debug/ -s . -t lcov --branch --ignore-not-existing --ignore '/*' --ignore '**/tests/**' --ignore '**/examples/**' -o ./coverage/lcov.info
+      - name: Generate HTML report
+        run: genhtml -o coverage-report -s --highlight --ignore-errors source --legend ./coverage/lcov.info
+      - name: Coveralls upload
+        uses: coverallsapp/github-action@master
+        with:
+          github-token: ${{ secrets.GITHUB_TOKEN }}
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: coverage-report
+          path: ./coverage/lcov.info

.github/workflows/rust.yml

@@ -2,7 +2,10 @@ name: CI
 
 on:
   push:
-    branches: [ "master" ]
+    branches: [
+      "master",
+      "test_ci",
+    ]
   pull_request:
 
 env: