firmata: install node_modules to where cmake guessed node was

This does now mean that modules won't go to /usr/local with the default prefix
but may instead try to install in /usr/lib. However if using nvm they should go
to the right place as long as NODE_ROOT_DIR is set correctly. This commit
changes NODE_ROOT_DIR to actually refer to the root directory of node rather
than the include dir which is what FindNodejs gets

Signed-off-by: Brendan Le Foll <brendan.le.foll@intel.com>

.travis.yml

@@ -14,7 +14,7 @@ install:
   - sudo ln -s /usr/bin/swig3.0 /usr/bin/swig
   - sudo update-java-alternatives -s java-8-oracle
 before_script:
-  - export NODE_ROOT_DIR="/home/travis/.nvm/v0.10.36/include"
+  - export NODE_ROOT_DIR="/home/travis/.nvm/v0.10.36"
   - if [ "$CC" = "gcc" ]; then export BUILDJAVA=ON; else export BUILDJAVA=OFF; fi
   - export JAVA_HOME=/usr/lib/jvm/java-8-oracle
   - if [ "${NODE4}" ]; then nvm install 4.1; export CC=gcc-4.8; export CXX=g++-4.8; export NODE_ROOT_DIR="/home/travis/.nvm/versions/node/`nvm version`/include"; fi

cmake/modules/FindNodejs.cmake

@@ -23,13 +23,13 @@ if (UV_ROOT_DIR)
 endif()
 
 # Now look for node. Flag an error if not found
-find_path (NODE_ROOT_DIR "node/node.h" "src/node.h"
+find_path (NODE_ROOT_DIR "include/node/node.h" "include/src/node.h"
   PATHS /usr/include/nodejs /usr/local/include/nodejs /usr/local/include)
 if (NODE_ROOT_DIR)
-  add_include_dir(${NODE_ROOT_DIR}/src)
-  add_include_dir(${NODE_ROOT_DIR}/node)
-  add_include_dir(${NODE_ROOT_DIR}/deps/v8/include)
-  add_include_dir(${NODE_ROOT_DIR}/deps/uv/include)
+  add_include_dir(${NODE_ROOT_DIR}/include/src)
+  add_include_dir(${NODE_ROOT_DIR}/include/node)
+  add_include_dir(${NODE_ROOT_DIR}/include/deps/v8/include)
+  add_include_dir(${NODE_ROOT_DIR}/include/deps/uv/include)
 else()
   unset(NODEJS_INCLUDE_DIRS)
   message(ERROR " - node.h not found")

src/javascript/CMakeLists.txt

@@ -54,11 +54,14 @@ if (${V8_VERSION_MAJOR} GREATER 3)
   endif ()
 endif ()
 
+set (NODE_MODULE_INSTALL_PATH ${NODE_ROOT_DIR}/lib/node_modules/mraa/)
+message (STATUS "INFO - install NODE modules to ${NODE_MODULE_INSTALL_PATH}")
+
 macro (mraa_CREATE_INSTALL_PACKAGE_JSON generated_file install_location)
   configure_file (${generated_file}.cmake ${CMAKE_CURRENT_BINARY_DIR}/${generated_file} @ONLY)
   install (FILES ${CMAKE_CURRENT_BINARY_DIR}/${generated_file} DESTINATION ${install_location})
 endmacro (mraa_CREATE_INSTALL_PACKAGE_JSON)
-mraa_create_install_package_json (package.json lib/node_modules/mraa)
+mraa_create_install_package_json (package.json ${NODE_MODULE_INSTALL_PATH})
 
 macro (mraa_CREATE_BINDING_GYP generated_file)
   set (mraa_LIB_SRCS_GYP "")
@@ -110,4 +113,4 @@ if (BUILDDOC)
 endif ()
 
 install (FILES ${CMAKE_CURRENT_BINARY_DIR}/mraa.node
-         DESTINATION lib/node_modules/mraa)
+         DESTINATION ${NODE_MODULE_INSTALL_PATH})

src/javascript/package.json.cmake

@@ -1,7 +1,7 @@
 {
   "name" : "mraa",
   "description": "IO library that helps you use I2c, SPI, gpio, uart, pwm, analog inputs (aio) and more on a number of platforms such as the Intel galileo, the Intel edison and others",
-  "keywords":["gpio", "edison","galileo","io", "mraajs", "spi", "i2c", "minnow", "intel"],
+  "keywords":["gpio", "edison","galileo","io", "mraajs", "spi", "i2c", "minnow", "intel", "firmata"],
   "homepage": "http://github.com/intel-iot-devkit/mraa",
   "main" : "./mraa.node",
   "engines": {