Ruby: enable Ruby bindings for BINDINGS="ALL"

- fix travis build:
  - using rvm ruby 2.3.1
  - use CMAKE_FIND_FRAMEWORK="LAST" to use the rvm library per default
  - set LD_LIBRARY_PATH for tests (required to kdb loader)

.travis.yml

@@ -17,6 +17,10 @@ matrix:
 
 before_install:
   - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then
+      rvm list;
+      rvm install 2.3.1;
+      rvm use 2.3.1;
+      gem install test-unit --no-document;
       export PATH=/usr/local/bin:/usr/local/sbin:$PATH;
       brew update;
       brew tap caskroom/cask;

cmake/ElektraCache.cmake

@@ -53,6 +53,7 @@ if (BINDINGS MATCHES "ALL" OR FINDEX GREATER -1)
 		swig_lua
 		swig_python2
 		swig_python
+		swig_ruby
 		)
 	set (BINDINGS_FORCE FORCE)
 endif ()

src/bindings/swig/ruby/CMakeLists.txt

@@ -1,6 +1,10 @@
 include (${SWIG_USE_FILE})
 include(LibAddMacros)
 
+# try user environment first, then search for system libs
+# required on OSX under rvm
+set (CMAKE_FIND_FRAMEWORK "LAST")
+
 find_package(Ruby)
 
 if (NOT RUBY_FOUND)
@@ -29,6 +33,8 @@ else()
 
 	# just for debugging
 	message (STATUS "Ruby executable: ${RUBY_EXECUTABLE}")
+	message (STATUS "Ruby library: ${RUBY_LIBRARY}")
+	message (STATUS "Ruby version: ${RUBY_VERSION}")
 	message (STATUS "Ruby vendor arch dir: ${RUBY_VENDOR_ARCH_DIR}")
 	message (STATUS "Ruby site arch dir: ${RUBY_SITE_ARCH_DIR}")
 	message (STATUS "Ruby include path: ${RUBY_INCLUDE_PATH}")
@@ -40,10 +46,11 @@ else()
 	set (CMAKE_SWIG_FLAGS "-O;-autorename;-DSWIG_NO_EXPORT_ITERATOR_METHODS;-v")
 
 	swig_add_module (swig-ruby ruby kdb.i)
-	swig_link_libraries (swig-ruby elektra-core elektra-kdb)
-	set_target_properties (swig-ruby PROPERTIES 
+	swig_link_libraries (swig-ruby ${RUBY_LIBRARY} elektra-core elektra-kdb)
+	set_target_properties (swig-ruby PROPERTIES
 		OUTPUT_NAME kdb
-		PREFIX "")
+		PREFIX ""
+	)
 
 	set_source_files_properties (
 		${swig_generated_file_fullname} PROPERTIES 
@@ -73,6 +80,7 @@ else()
 	)
 
 	include_directories (${CMAKE_CURRENT_SOURCE_DIR})
-
-	add_subdirectory (tests)
+	if (BUILD_TESTING)
+		add_subdirectory (tests)
+	endif (BUILD_TESTING)
 endif()

src/bindings/swig/ruby/tests/CMakeLists.txt

@@ -10,7 +10,19 @@ foreach (file ${TESTS})
 	set_property (
 		TEST ${name}
 		PROPERTY ENVIRONMENT
-		"RUBYLIB=${CMAKE_CURRENT_BINARY_DIR}/.."
+			"RUBYLIB=${CMAKE_CURRENT_BINARY_DIR}/.."
+			"LD_LIBRARY_PATH=${CMAKE_BINARY_DIR}/lib"
+	)
+
+	set_property (
+		TEST ${name}
+		PROPERTY LABELS bindings memleak
 	)
 
 endforeach (file ${TESTS})
+
+# special label for kdb
+set_property (
+  TEST "testruby_kdb"
+  APPEND PROPERTY LABELS kdbtests
+)