ci: add clang code coverage check

.drone.yml

@@ -48,6 +48,9 @@ steps:
 - name: code coverage
   image: amd64_clang_coverage:latest
   pull: if-not-exists
+  environment:
+    CODECOV_TOKEN:
+      from_secret: CODECOV_TOKEN 
   commands:
     - ./tools/ci/amd64/clang/coverage.sh
 

tools/ci/amd64/clang/coverage.sh

@@ -13,7 +13,7 @@ conan build . \
     -s compiler.version=20 \
     -s compiler.libcxx=libc++ \
     -o use_mold=True \
-    -o enable_lcov=True \
+    -o enable_llvm_coverage=True \
     --build=missing
 
 for test in $(find ./build -type f -name '*_tests' -executable); do
@@ -21,3 +21,15 @@ for test in $(find ./build -type f -name '*_tests' -executable); do
   "$test"
 done
 
+mkdir -p ./build/coverage/ 
+for test in $(find ./build -type f -name '*_tests' -executable); do
+    export LLVM_PROFILE_FILE="./build/coverage/$(basename "$(dirname "{}")").profraw";
+    echo $${LLVM_PROFILE_FILE} >> ./build/coverage/list;
+    "$test"
+done
+
+llvm-profdata merge --input-files './build/coverage/list' -o "./build/coverage/merged.profdata" 
+find ./modules -type f -name "*.profraw" -exec rm -fv {} +
+LLVM_COV_SHOW=$(llvm-cov show -instr-profile="./build/coverage/merged.profdata" $(find ./build -type f -name "tests" -executable -exec printf -- '-object %s ' {} \;) -ignore-filename-regex="./modules/[^/]+/tests")
+echo "$${LLVM_COV_SHOW}" > "./build/coverage/coverage.txt"
+wget -qO- "https://codecov.io/bash" | bash