Conditionally check for tests

CMakeLists.txt

@@ -10,6 +10,9 @@ set(HUNTER_TLS_VERIFY ON)
 
 option(HUNTER_ENABLED "Enable Hunter package manager support" ON)
 
+set(IS_MAIN_FILE CMAKE_SOURCE_DIR STREQUAL CMAKE_CURRENT_SOURCE_DIR)
+option(BUILD_TESTING "Enable build of tests" IS_MAIN_FILE)
+
 include("cmake/HunterGate.cmake")
 include("cmake/Catch.cmake")
 
@@ -20,34 +23,36 @@ HunterGate(
 
 project(SqliteModernCpp)
 
-hunter_add_package(Catch)
 hunter_add_package(sqlite3)
-
-find_package(Catch2 CONFIG REQUIRED)
 find_package(sqlite3 CONFIG REQUIRED)
 
-set(TEST_SOURCE_DIR             ${CMAKE_CURRENT_SOURCE_DIR}/tests)
-file(GLOB TEST_SOURCES          ${TEST_SOURCE_DIR}/*.cc)
+
+if(BUILD_TESTING)
+    hunter_add_package(Catch)
+    find_package(Catch2 CONFIG REQUIRED)
+
+    set(TEST_SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/tests)
+    file(GLOB TEST_SOURCES ${TEST_SOURCE_DIR}/*.cc)
 
 IF(NOT ENABLE_SQLCIPHER_TESTS)
     list(REMOVE_ITEM TEST_SOURCES ${TEST_SOURCE_DIR}/sqlcipher.cc)
 ENDIF(NOT ENABLE_SQLCIPHER_TESTS)
 
 enable_testing()
 
-add_library (sqlite_modern_cpp INTERFACE)
-target_include_directories(sqlite_modern_cpp INTERFACE hdr/)
-
 add_executable(tests_runner ${TEST_SOURCES})
 target_include_directories(tests_runner INTERFACE ${SQLITE3_INCLUDE_DIRS})
+
 if(ENABLE_SQLCIPHER_TESTS)
     target_link_libraries(tests_runner Catch2::Catch2 sqlite_modern_cpp sqlite3::sqlite3 -lsqlcipher)
 else()
     target_link_libraries(tests_runner Catch2::Catch2 sqlite_modern_cpp sqlite3::sqlite3)
 endif()
 
 catch_discover_tests(tests_runner)
-target_compile_options(tests_runner PUBLIC $<$<CXX_COMPILER_ID:MSVC>:/Zc:__cplusplus> )
+
+    target_compile_options(tests_runner PUBLIC $<$<CXX_COMPILER_ID:MSVC>:/Zc:__cplusplus>)
+endif()
 
 # Place the file in the source directory, permitting us to place a single configuration file for YCM there.
 # YCM is the code-completion engine for (neo)vim https://github.com/Valloric/YouCompleteMe