ci: Use justfile command to run coverage

.github/workflows/coverage.yml

@@ -2,7 +2,7 @@ name: Test coverage
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
     branches:
       - main
@@ -28,14 +28,16 @@ jobs:
       - uses: actions/checkout@v4
       - uses: rui314/setup-mold@v1
       - uses: Swatinem/rust-cache@v2
+      - name: Install zsh
+        run: sudo apt install -y zsh
+      - uses: taiki-e/install-action@just
       - uses: taiki-e/install-action@nextest
       - uses: taiki-e/install-action@cargo-llvm-cov
 
       - name: Collect coverage data
         # Generate coverage report using nextest.
         run: |
-          cargo llvm-cov --no-report nextest --all-features
-          cargo llvm-cov --no-report --doc --all-features
+          just coverage-tests
           cargo llvm-cov report --doctests --lcov --output-path lcov.info
       - name: Upload coverage data to codecov
         uses: codecov/codecov-action@v4

justfile

@@ -52,16 +52,21 @@ coverage-clean:
     cargo +nightly llvm-cov clean
 
 # Run tests with coverage.
-coverage: coverage-clean
+coverage-tests: coverage-clean
     cargo +nightly llvm-cov --no-report nextest --all-features
     cargo +nightly llvm-cov --no-report --doc --all-features
+
+# Run tests with coverage and generate an html report.
+coverage: coverage-tests
     # Generate and open an HTML coverage report
     cargo +nightly llvm-cov report --lcov --output-path ./target/llvm-cov-target/debug/lcov.info
     genhtml -o ./target/llvm-cov-target/debug/coverage/ --show-details --highlight --ignore-errors source --legend ./target/llvm-cov-target/debug/lcov.info
 
+open_cmd := if os() == "macos" { "open" } else { "xdg-open" }
+
 # Run tests with coverage and open the generated HTML report.
 coverage-open: coverage
-    open target/llvm-cov-target/debug/coverage/index.html
+    {{ open_cmd }} target/llvm-cov-target/debug/coverage/index.html
 
 alias fmt := format
 # Format the project