MXS-1300: Add check for Node.js version

The Node.js version is checked before MaxCtrl is built.

cmake/FindNodeJS.cmake

@@ -0,0 +1,22 @@
+# Find the Node.js executable
+#
+# The following variables are set:
+# NODEJS_FOUND      True if Node.js was found
+# NODEJS_EXECUTABLE Path to the Node.js executable
+# NODEJS_VERSION    Node.js version
+
+find_program(NODEJS_EXECUTABLE node)
+
+if (${NODEJS_EXECUTABLE} MATCHES "NOTFOUND")
+  message(STATUS "Could not find Node.js")
+  set(NODEJS_FOUND FALSE CACHE INTERNAL "")
+  unset(NODEJS_EXECUTABLE)
+else()
+  execute_process(COMMAND ${NODEJS_EXECUTABLE} --version
+    OUTPUT_VARIABLE VERSION_VAR)
+  string(REGEX REPLACE "[v]" "" VERSION_VAR ${VERSION_VAR})
+  string(STRIP ${VERSION_VAR} VERSION_VAR)
+  set(NODEJS_VERSION ${VERSION_VAR} CACHE INTERNAL "")
+  set(NODEJS_FOUND TRUE CACHE INTERNAL "")
+  message(STATUS "Found Node.js version ${NODEJS_VERSION}: ${NODEJS_EXECUTABLE}")
+endif()

maxctrl/CMakeLists.txt

@@ -1,6 +1,7 @@
 find_package(NPM)
+find_package(NodeJS)
 
-if (NPM_FOUND)
+if (NPM_FOUND AND NODEJS_FOUND AND NODEJS_VERSION VERSION_GREATER "6.0.0")
   add_custom_command(OUTPUT ${CMAKE_BINARY_DIR}/maxctrl/maxctrl
     COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/build.sh ${CMAKE_SOURCE_DIR}
     WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
@@ -15,5 +16,5 @@ if (NPM_FOUND)
   WORKING_DIRECTORY ${CMAKE_BINARY_DIR})
 
 else()
-  message(STATUS "Not building MaxCtrl: npm not found")
+  message(STATUS "Not building MaxCtrl: npm or Node.js >= 6.0.0 not found")
 endif()