Generate code coverage reports (#649)

Author: yutaro-sakamoto

.github/workflows/coverage.yml

@@ -0,0 +1,65 @@
+name: Coverage
+
+on:
+  workflow_dispatch:
+  workflow_call:
+
+permissions:
+  contents: read
+
+env:
+  CLASSPATH: ":/usr/lib/opensourcecobol4j/libcobj.jar"
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+
+    steps: 
+      - uses: actions/setup-java@v4
+        with:
+          distribution: 'temurin'
+          java-version: '21'
+
+      - name: Install dependencies on Ubuntu
+        run: |
+          sudo apt-get update -y
+          sudo apt-get install -y build-essential gettext autoconf bison flex gcovr
+
+      - name: Checkout opensource COBOL 4J
+        uses: actions/checkout@v4
+      
+      - name: Install opensource COBOL 4J
+        run: |
+          ./configure --prefix=/usr/ CFLAGS='-fprofile-arcs -ftest-coverage'
+          make
+          sudo make install
+
+      - name: Run NIST test
+        working-directory: tests/cobol85
+        run: make test || true
+
+      - name: Run other tests
+        working-directory: tests
+        run: |
+          tests=("command-line-options" "data-rep" "i18n_sjis" "jp-compat" "run" "syntax" "cobj-idx" "misc")
+          for test in "${tests[@]}"; do
+            ./"$test" || true
+          done
+
+      - name: Generate a coverage report
+        working-directory: cobj
+        run: |
+          gcov -l ./*.gcda
+          gcovr -r . \
+            -e cobj-parser -e cobj-scanner -e cobj-pplex -e cobj-ppparse \
+            -e parser.c -e parser.y -e scanner.l -e scanner.c -e pplex.l -e pplex.c -e ppparse.y -e ppparse.c \
+            -e flag-help.def -e warning-help.def -e warning.def \
+            --html-details --html-self-contained --html -o report.html --txt-metric=branch
+          mkdir -p coverage-report
+          cp ./*.html coverage-report
+
+      - name: Archive a coverage report
+        uses: actions/upload-artifact@v4
+        with:
+          name: code-coverage-report
+          path: cobj/coverage-report/

.github/workflows/push.yml

@@ -40,6 +40,11 @@ jobs:
       os: ${{ matrix.os }}
       configure-args: --enable-utf8
 
+  coverage:
+    needs: check-workflows
+    if: github.ref == 'refs/heads/develop'
+    uses: ./.github/workflows/coverage.yml
+
   run-test-other:
     needs: build
     strategy: