build(coverage): improve coverage generation

Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>

Author: casaroli

.github/workflows/linux.yml

@@ -5,6 +5,9 @@
 
 name: Linux
 
+permissions:
+  pull-requests: write
+
 on:
   workflow_call:
     inputs:
@@ -62,14 +65,22 @@ jobs:
 
       - name: Build and run (source coverage)
         working-directory: build
-        run: make
+        run: make coverage report.md
 
       - name: Upload coverage report
         uses: actions/upload-artifact@v4
         with:
           name: ocre-coverage
           include-hidden-files: true
-          path: build/report
+          path: build/coverage
+
+      - name: Report code coverage
+        uses: marocchino/sticky-pull-request-comment@v3
+        with:
+          message: |
+            ```
+            $(cat build/report.txt)
+            ```
 
       - name: Delete build directory
         run: rm -rf build

tests/coverage/CMakeLists.txt

@@ -15,22 +15,53 @@ project(OcreTestSourceCoverage)
 
 add_subdirectory(../system/posix OcreSystemTests)
 
-add_custom_target(coverage ALL
+add_custom_target(default.profdata
     COMMAND llvm-profdata merge -sparse
-        OcreSystemTests/test_lib.profraw
-        OcreSystemTests/test_ocre.profraw
-        OcreSystemTests/test_context.profraw
-        OcreSystemTests/test_container.profraw
-        -o default.profdata
+    OcreSystemTests/test_lib.profraw
+    OcreSystemTests/test_ocre.profraw
+    OcreSystemTests/test_context.profraw
+    OcreSystemTests/test_container.profraw
+    -o default.profdata
+    DEPENDS
+    OcreSystemTests/test_lib.profraw
+    OcreSystemTests/test_ocre.profraw
+    OcreSystemTests/test_context.profraw
+    OcreSystemTests/test_container.profraw
+    run-systests
+)
+
+add_custom_target(coverage ALL
     COMMAND llvm-cov show
-        -format=html -output-dir=report
+        -format=html -output-dir=coverage
         -instr-profile=default.profdata
-        --ignore-filename-regex=$wasm-micro-runtime/
-        --ignore-filename-regex=$test/
+        --sources ${CMAKE_CURRENT_LIST_DIR}/../../src
         --object=OcreSystemTests/test_lib
         --object=OcreSystemTests/test_ocre
         --object=OcreSystemTests/test_context
         --object=OcreSystemTests/test_container
     DEPENDS
-    run-systests
+        OcreSystemTests/test_lib
+        OcreSystemTests/test_ocre
+        OcreSystemTests/test_context
+        OcreSystemTests/test_container
+        default.profdata
+)
+
+add_custom_target(report.md
+    COMMAND echo '```' > report.md
+    COMMAND llvm-cov report
+        -instr-profile=default.profdata
+        --sources ${CMAKE_CURRENT_LIST_DIR}/../../src
+        --object=OcreSystemTests/test_lib
+        --object=OcreSystemTests/test_ocre
+        --object=OcreSystemTests/test_context
+        --object=OcreSystemTests/test_container
+        >> report.md
+    COMMAND echo '```' >> report.md
+    DEPENDS
+        OcreSystemTests/test_lib
+        OcreSystemTests/test_ocre
+        OcreSystemTests/test_context
+        OcreSystemTests/test_container
+        default.profdata
 )