cmake: generate clay main

The clay test suite files clay.h and clay_main.c are generated by
the clay python script. Teach CMake about this dependency and
remove the generated files from the repository.

.gitignore

+/tests-clay/clay.h
+/tests-clay/clay_main.c
 /apidocs
 /trash-*.exe
 /libgit2.pc

CMakeLists.txt

@@ -142,13 +142,22 @@ IF (BUILD_TESTS)
 ENDIF ()
 
 IF (BUILD_CLAY)
+	FIND_PACKAGE(PythonInterp REQUIRED)
+
 	SET(CLAY_FIXTURES "${CMAKE_CURRENT_SOURCE_DIR}/tests/resources/")
+	SET(CLAY_PATH "${CMAKE_CURRENT_SOURCE_DIR}/tests-clay")
 	ADD_DEFINITIONS(-DCLAY_FIXTURE_PATH=\"${CLAY_FIXTURES}\")
 
-    INCLUDE_DIRECTORIES(tests-clay)
-	FILE(GLOB_RECURSE SRC_TEST tests-clay/*.c)
+	INCLUDE_DIRECTORIES(${CLAY_PATH})
+	FILE(GLOB_RECURSE SRC_TEST ${CLAY_PATH}/*/*.c ${CLAY_PATH}/clay_helpers.c ${CLAY_PATH}/testlib.c)
 
-	ADD_EXECUTABLE(libgit2_clay ${SRC} ${SRC_TEST} ${SRC_ZLIB} ${SRC_HTTP})
+	ADD_CUSTOM_COMMAND(
+		OUTPUT ${CLAY_PATH}/clay_main.c ${CLAY_PATH}/clay.h
+		COMMAND ${PYTHON_EXECUTABLE} clay -vtap .
+		DEPENDS ${CLAY_PATH}/clay ${SRC_TEST}
+		WORKING_DIRECTORY ${CLAY_PATH}
+	)
+	ADD_EXECUTABLE(libgit2_clay ${SRC} ${CLAY_PATH}/clay_main.c ${SRC_TEST} ${SRC_ZLIB} ${SRC_HTTP})
 	TARGET_LINK_LIBRARIES(libgit2_clay ${CMAKE_THREAD_LIBS_INIT})
 	IF (WIN32)
 		TARGET_LINK_LIBRARIES(libgit2_clay ws2_32)

tests-clay/README.md

@@ -9,13 +9,9 @@ https://github.com/tanoku/clay
 
 * Write your modules and tests. Use good, meaningful names.
 
-* Mix the tests:
-
-        ./clay -vtap .
-
 * Make sure you actually build the tests by setting:
 
-        BUILD_CLAY=ON
+        cmake -DBUILD_CLAY=ON build/
 
 * Test: