Only add antkeeper-data external project if directory exists

CMakeLists.txt

@@ -222,20 +222,22 @@ ExternalProject_Add(antkeeper-source
 		"-DCMAKE_CXX_FLAGS_RELEASE='${CMAKE_CXX_FLAGS_RELEASE}'"
 	BUILD_ALWAYS 1)
 
-# Build antkeeper-data module
-ExternalProject_Add(antkeeper-data
-	DEPENDS antkeeper-source
-	SOURCE_DIR ${MODULE_SOURCE_DIR}/antkeeper-data
-	BINARY_DIR ${MODULE_BUILD_DIR}/antkeeper-data
-	INSTALL_DIR ${PACKAGE_INSTALL_DIR}
-	CMAKE_ARGS
-		"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
-		"-DCMAKE_INSTALL_PREFIX=${PACKAGE_INSTALL_DIR}"
-		"-DPACKAGE_PLATFORM=${PACKAGE_PLATFORM}"
-		"-DCMAKE_PREFIX_PATH=${MODULE_INSTALL_DIR}"
-		"-DBLENDER=${BLENDER}"
-		"-DINKSCAPE=${INKSCAPE}"
-	BUILD_ALWAYS 1)
+# Build antkeeper-data module (if exists)
+if(IS_DIRECTORY ${MODULE_SOURCE_DIR}/antkeeper-data)
+	ExternalProject_Add(antkeeper-data
+		DEPENDS antkeeper-source
+		SOURCE_DIR ${MODULE_SOURCE_DIR}/antkeeper-data
+		BINARY_DIR ${MODULE_BUILD_DIR}/antkeeper-data
+		INSTALL_DIR ${PACKAGE_INSTALL_DIR}
+		CMAKE_ARGS
+			"-DCMAKE_BUILD_TYPE=${CMAKE_BUILD_TYPE}"
+			"-DCMAKE_INSTALL_PREFIX=${PACKAGE_INSTALL_DIR}"
+			"-DPACKAGE_PLATFORM=${PACKAGE_PLATFORM}"
+			"-DCMAKE_PREFIX_PATH=${MODULE_INSTALL_DIR}"
+			"-DBLENDER=${BLENDER}"
+			"-DINKSCAPE=${INKSCAPE}"
+		BUILD_ALWAYS 1)
+endif()
 
 # Create install target
 install(DIRECTORY "${PACKAGE_INSTALL_DIR}/" DESTINATION . COMPONENT "package" USE_SOURCE_PERMISSIONS FILES_MATCHING PATTERN "*")

modules/antkeeper-source

@@ -1 +1 @@
-Subproject commit 8a13e2c18e609a4a3a638ad6fe75399de25db599
+Subproject commit eda82650c9978cb75ae344c404a3abeb76bef5d1