Prepare for cpp codecoverage (#7900)

Signed-off-by: yhmo <yihua.mo@zilliz.com>

.gitignore

@@ -82,5 +82,9 @@ profile.out
 cover.out
 coverage.html
 
+#cpp-codecov
+*.info
+lcov_out/
+
 # virtualenv
 venv/

Makefile

@@ -105,7 +105,7 @@ build-cpp:
 
 build-cpp-with-unittest:
 	@echo "Building Milvus cpp library with unittest ..."
-	@(env bash $(PWD)/scripts/core_build.sh -u -f "$(CUSTOM_THIRDPARTY_PATH)")
+	@(env bash $(PWD)/scripts/core_build.sh -u -c -f "$(CUSTOM_THIRDPARTY_PATH)")
 	@(env bash $(PWD)/scripts/cwrapper_build.sh -t Release -f "$(CUSTOM_THIRDPARTY_PATH)")
 
 # Runs the tests.

scripts/run_cpp_codecov.sh

@@ -0,0 +1,91 @@
+#!/usr/bin/env bash
+
+set -e
+
+SOURCE="${BASH_SOURCE[0]}"
+while [ -h "$SOURCE" ]; do # resolve $SOURCE until the file is no longer a symlink
+  DIR="$( cd -P "$( dirname "$SOURCE" )" && pwd )"
+  SOURCE="$(readlink "$SOURCE")"
+  [[ $SOURCE != /* ]] && SOURCE="$DIR/$SOURCE" # if $SOURCE was a relative symlink, we need to resolve it relative to the path where the symlink file was located
+done
+ROOT_DIR="$( cd -P "$( dirname "$SOURCE" )/.." && pwd )"
+
+MILVUS_CORE_DIR="${ROOT_DIR}/internal/core"
+CORE_INSTALL_PREFIX="${MILVUS_CORE_DIR}/output"
+UNITTEST_DIRS=("${CORE_INSTALL_PREFIX}/unittest")
+CWRAPPER_UNITTEST="${ROOT_DIR}/internal/storage/cwrapper/output/wrapper_test"
+
+echo "ROOT_DIR = ${ROOT_DIR}"
+echo "MILVUS_CORE_DIR = ${MILVUS_CORE_DIR}"
+echo "CORE_INSTALL_PREFIX = ${CORE_INSTALL_PREFIX}"
+echo "UNITTEST_DIRS = ${UNITTEST_DIRS}"
+echo "CWRAPPER_UNITTEST = ${CWRAPPER_UNITTEST}"
+
+export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:${CORE_INSTALL_PREFIX}/lib
+echo "LD_LIBRARY_PATH = ${LD_LIBRARY_PATH}"
+
+LCOV_CMD="lcov"
+LCOV_GEN_CMD="genhtml"
+
+FILE_INFO_BASE="base.info"
+FILE_INFO_MILVUS="server.info"
+FILE_INFO_OUTPUT="output.info"
+FILE_INFO_OUTPUT_NEW="output_new.info"
+DIR_LCOV_OUTPUT="${ROOT_DIR}/lcov_out"
+
+DIR_GCNO="${ROOT_DIR}/cmake_build"
+DIR_UNITTEST="${CORE_INSTALL_PREFIX}/unittest"
+
+# delete old code coverage info files
+rm -f FILE_INFO_BASE
+rm -f FILE_INFO_MILVUS
+rm -f FILE_INFO_OUTPUT
+rm -f FILE_INFO_OUTPUT_NEW
+rm -rf lcov_out
+rm -f FILE_INFO_BASE FILE_INFO_MILVUS FILE_INFO_OUTPUT FILE_INFO_OUTPUT_NEW
+
+
+# get baseline
+${LCOV_CMD} -c -i -d ${DIR_GCNO} -o "${FILE_INFO_BASE}"
+if [ $? -ne 0 ]; then
+    echo "gen baseline coverage run failed"
+    exit -1
+fi
+
+for test in `ls ${DIR_UNITTEST}`; do
+    echo $test
+    # run unittest
+    ${DIR_UNITTEST}/${test}
+    if [ $? -ne 0 ]; then
+        echo ${args}
+        echo ${DIR_UNITTEST}/${test} "run failed"
+        exit -1
+    fi
+done
+
+# gen code coverage
+${LCOV_CMD} -d ${DIR_GCNO} -o "${FILE_INFO_MILVUS}" -c
+# merge coverage
+${LCOV_CMD} -a ${FILE_INFO_BASE} -a ${FILE_INFO_MILVUS} -o "${FILE_INFO_OUTPUT}"
+
+# remove third party from tracefiles
+${LCOV_CMD} -r "${FILE_INFO_OUTPUT}" -o "${FILE_INFO_OUTPUT_NEW}" \
+    "/usr/*" \
+    "*/boost/*" \
+    "*/cmake_build/*_ep-prefix/*" \
+    "*/src/index/cmake_build*" \
+    "*/src/index/thirdparty*" \
+    "*/src/grpc*" \
+    "*/src/metrics/MetricBase.h" \
+    "*/src/server/Server.cpp" \
+    "*/src/server/DBWrapper.cpp" \
+    "*/src/server/grpc_impl/GrpcServer.cpp" \
+    "*/thirdparty/*"
+
+if [ $? -ne 0 ]; then
+    echo "generate ${FILE_INFO_OUTPUT_NEW} failed"
+    exit -2
+fi
+# gen html report
+${LCOV_GEN_CMD} "${FILE_INFO_OUTPUT_NEW}" --output-directory ${DIR_LCOV_OUTPUT}/
+