# - Find Ruby

# This module finds if Ruby is installed and determines where the include files

# and libraries are. Ruby 1.8 and 1.9 are supported.

#

# The minimum required version of Ruby can be specified using the

# standard syntax, e.g. FIND_PACKAGE(Ruby 1.8)

#

# It also determines what the name of the library is. This

# code sets the following variables:

#

#  RUBY_EXECUTABLE   = full path to the ruby binary

#  RUBY_INCLUDE_DIRS = include dirs to be used when using the ruby library

#  RUBY_LIBRARY      = full path to the ruby library

#  RUBY_VERSION      = the version of ruby which was found, e.g. "1.8.7"

#  RUBY_FOUND        = set to true if ruby ws found successfully

#

#  RUBY_INCLUDE_PATH = same as RUBY_INCLUDE_DIRS, only provided for compatibility reasons, don't use it

#=============================================================================

# Copyright 2004-2009 Kitware, Inc.

# Copyright 2008-2009 Alexander Neundorf <neundorf@kde.org>

#

# Redistribution and use in source and binary forms, with or without

# modification, are permitted provided that the following conditions

# are met:

#

# * Redistributions of source code must retain the above copyright

#   notice, this list of conditions and the following disclaimer.

#

# * Redistributions in binary form must reproduce the above copyright

#   notice, this list of conditions and the following disclaimer in the

#   documentation and/or other materials provided with the distribution.

#

# * Neither the names of Kitware, Inc., the Insight Software Consortium,

#   nor the names of their contributors may be used to endorse or promote

#   products derived from this software without specific prior written

#   permission.

#

# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

# HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#=============================================================================

#   RUBY_ARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"archdir"@:>@)'`

#   RUBY_SITEARCHDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitearchdir"@:>@)'`

#   RUBY_SITEDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"sitelibdir"@:>@)'`

#   RUBY_LIBDIR=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"libdir"@:>@)'`

#   RUBY_LIBRUBYARG=`$RUBY -r rbconfig -e 'printf("%s",Config::CONFIG@<:@"LIBRUBYARG_SHARED"@:>@)'`

# uncomment the following line to get debug output for this file

# SET(_RUBY_DEBUG_OUTPUT TRUE)

# Determine the list of possible names of the ruby executable depending

# on which version of ruby is required

SET(_RUBY_POSSIBLE_EXECUTABLE_NAMES ruby)

# if 1.9 is required, don't look for ruby18 and ruby1.8, default to version 1.8

IF(Ruby_FIND_VERSION_MAJOR  AND  Ruby_FIND_VERSION_MINOR)

   SET(Ruby_FIND_VERSION_SHORT_NODOT "${Ruby_FIND_VERSION_MAJOR}${RUBY_FIND_VERSION_MINOR}")

ELSE(Ruby_FIND_VERSION_MAJOR  AND  Ruby_FIND_VERSION_MINOR)

   SET(Ruby_FIND_VERSION_SHORT_NODOT "18")

ENDIF(Ruby_FIND_VERSION_MAJOR  AND  Ruby_FIND_VERSION_MINOR)

SET(_RUBY_POSSIBLE_EXECUTABLE_NAMES ${_RUBY_POSSIBLE_EXECUTABLE_NAMES} ruby1.9 ruby19)

# if we want a version below 1.9, also look for ruby 1.8

IF("${Ruby_FIND_VERSION_SHORT_NODOT}" VERSION_LESS "19")

   SET(_RUBY_POSSIBLE_EXECUTABLE_NAMES ${_RUBY_POSSIBLE_EXECUTABLE_NAMES} ruby1.8 ruby18)

ENDIF("${Ruby_FIND_VERSION_SHORT_NODOT}" VERSION_LESS "19")

FIND_PROGRAM(RUBY_EXECUTABLE NAMES ${_RUBY_POSSIBLE_EXECUTABLE_NAMES})

IF(RUBY_EXECUTABLE  AND NOT  RUBY_VERSION_MAJOR)

  FUNCTION(_RUBY_CONFIG_VAR RBVAR OUTVAR)

    EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print RbConfig::CONFIG['${RBVAR}']"

      RESULT_VARIABLE _RUBY_SUCCESS

      OUTPUT_VARIABLE _RUBY_OUTPUT

      ERROR_QUIET)

    IF(_RUBY_SUCCESS OR NOT _RUBY_OUTPUT)

      EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['${RBVAR}']"

        RESULT_VARIABLE _RUBY_SUCCESS

        OUTPUT_VARIABLE _RUBY_OUTPUT

        ERROR_QUIET)

    ENDIF(_RUBY_SUCCESS OR NOT _RUBY_OUTPUT)

    SET(${OUTVAR} "${_RUBY_OUTPUT}" PARENT_SCOPE)

  ENDFUNCTION(_RUBY_CONFIG_VAR)

  # query the ruby version

   _RUBY_CONFIG_VAR("MAJOR" RUBY_VERSION_MAJOR)

   _RUBY_CONFIG_VAR("MINOR" RUBY_VERSION_MINOR)

   _RUBY_CONFIG_VAR("TEENY" RUBY_VERSION_PATCH)

   # query the different directories

   _RUBY_CONFIG_VAR("archdir" RUBY_ARCH_DIR)

   _RUBY_CONFIG_VAR("arch" RUBY_ARCH)

   _RUBY_CONFIG_VAR("rubyhdrdir" RUBY_HDR_DIR)

   _RUBY_CONFIG_VAR("libdir" RUBY_POSSIBLE_LIB_DIR)

   _RUBY_CONFIG_VAR("rubylibdir" RUBY_RUBY_LIB_DIR)

   # site_ruby

   _RUBY_CONFIG_VAR("sitearchdir" RUBY_SITEARCH_DIR)

   _RUBY_CONFIG_VAR("sitelibdir" RUBY_SITELIB_DIR)

   # vendor_ruby available ?

   EXECUTE_PROCESS(COMMAND ${RUBY_EXECUTABLE} -r rbconfig -e "print 'true' unless RbConfig::CONFIG['vendorarchdir'].nil?"

      OUTPUT_VARIABLE RUBY_HAS_VENDOR_RUBY  ERROR_QUIET)

   IF(RUBY_HAS_VENDOR_RUBY)

      _RUBY_CONFIG_VAR("vendorlibdir" RUBY_VENDORLIB_DIR)

      _RUBY_CONFIG_VAR("vendorarchdir" RUBY_VENDORARCH_DIR)

   ENDIF(RUBY_HAS_VENDOR_RUBY)

   # save the results in the cache so we don't have to run ruby the next time again

   SET(RUBY_VERSION_MAJOR    ${RUBY_VERSION_MAJOR}    CACHE PATH "The Ruby major version" FORCE)

   SET(RUBY_VERSION_MINOR    ${RUBY_VERSION_MINOR}    CACHE PATH "The Ruby minor version" FORCE)

   SET(RUBY_VERSION_PATCH    ${RUBY_VERSION_PATCH}    CACHE PATH "The Ruby patch version" FORCE)

   SET(RUBY_ARCH_DIR         ${RUBY_ARCH_DIR}         CACHE PATH "The Ruby arch dir" FORCE)

   SET(RUBY_HDR_DIR          ${RUBY_HDR_DIR}          CACHE PATH "The Ruby header dir (1.9)" FORCE)

   SET(RUBY_POSSIBLE_LIB_DIR ${RUBY_POSSIBLE_LIB_DIR} CACHE PATH "The Ruby lib dir" FORCE)

   SET(RUBY_RUBY_LIB_DIR     ${RUBY_RUBY_LIB_DIR}     CACHE PATH "The Ruby ruby-lib dir" FORCE)

   SET(RUBY_SITEARCH_DIR     ${RUBY_SITEARCH_DIR}     CACHE PATH "The Ruby site arch dir" FORCE)

   SET(RUBY_SITELIB_DIR      ${RUBY_SITELIB_DIR}      CACHE PATH "The Ruby site lib dir" FORCE)

   SET(RUBY_HAS_VENDOR_RUBY  ${RUBY_HAS_VENDOR_RUBY}  CACHE BOOL "Vendor Ruby is available" FORCE)

   SET(RUBY_VENDORARCH_DIR   ${RUBY_VENDORARCH_DIR}   CACHE PATH "The Ruby vendor arch dir" FORCE)

   SET(RUBY_VENDORLIB_DIR    ${RUBY_VENDORLIB_DIR}    CACHE PATH "The Ruby vendor lib dir" FORCE)

   MARK_AS_ADVANCED(

     RUBY_ARCH_DIR

     RUBY_ARCH

     RUBY_HDR_DIR

     RUBY_POSSIBLE_LIB_DIR

     RUBY_RUBY_LIB_DIR

     RUBY_SITEARCH_DIR

     RUBY_SITELIB_DIR

     RUBY_HAS_VENDOR_RUBY

     RUBY_VENDORARCH_DIR

     RUBY_VENDORLIB_DIR

     RUBY_VERSION_MAJOR

     RUBY_VERSION_MINOR

     RUBY_VERSION_PATCH

     )

ENDIF(RUBY_EXECUTABLE  AND NOT  RUBY_VERSION_MAJOR)

# In case RUBY_EXECUTABLE could not be executed (e.g. cross compiling)

# try to detect which version we found. This is not too good.

IF(RUBY_EXECUTABLE AND NOT RUBY_VERSION_MAJOR)

   # by default assume 1.8.0

   SET(RUBY_VERSION_MAJOR 1)

   SET(RUBY_VERSION_MINOR 8)

   SET(RUBY_VERSION_PATCH 0)

   # check whether we found 1.9.x

   IF(${RUBY_EXECUTABLE} MATCHES "ruby1.?9"  OR  RUBY_HDR_DIR)

      SET(RUBY_VERSION_MAJOR 1)

      SET(RUBY_VERSION_MINOR 9)

   ENDIF(${RUBY_EXECUTABLE} MATCHES "ruby1.?9"  OR  RUBY_HDR_DIR)

ENDIF(RUBY_EXECUTABLE AND NOT RUBY_VERSION_MAJOR)

IF(RUBY_VERSION_MAJOR)

   SET(RUBY_VERSION "${RUBY_VERSION_MAJOR}.${RUBY_VERSION_MINOR}.${RUBY_VERSION_PATCH}")

   SET(_RUBY_VERSION_SHORT "${RUBY_VERSION_MAJOR}.${RUBY_VERSION_MINOR}")

   SET(_RUBY_VERSION_SHORT_NODOT "${RUBY_VERSION_MAJOR}${RUBY_VERSION_MINOR}")

   SET(_RUBY_NODOT_VERSION "${RUBY_VERSION_MAJOR}${RUBY_VERSION_MINOR}${RUBY_VERSION_PATCH}")

ENDIF(RUBY_VERSION_MAJOR)

FIND_PATH(RUBY_INCLUDE_DIR

   NAMES ruby.h

   HINTS

   ${RUBY_HDR_DIR}

   ${RUBY_ARCH_DIR}

   /usr/lib/ruby/${_RUBY_VERSION_SHORT}/i586-linux-gnu/ )

SET(RUBY_INCLUDE_DIRS ${RUBY_INCLUDE_DIR} )

# if ruby > 1.8 is required or if ruby > 1.8 was found, search for the config.h dir

IF( "${Ruby_FIND_VERSION_SHORT_NODOT}" GREATER 18  OR  "${_RUBY_VERSION_SHORT_NODOT}" GREATER 18  OR  RUBY_HDR_DIR)

   FIND_PATH(RUBY_CONFIG_INCLUDE_DIR

     NAMES ruby/config.h  config.h

     HINTS

     ${RUBY_HDR_DIR}/${RUBY_ARCH}

     ${RUBY_ARCH_DIR}

     )

   SET(RUBY_INCLUDE_DIRS ${RUBY_INCLUDE_DIRS} ${RUBY_CONFIG_INCLUDE_DIR} )

ENDIF( "${Ruby_FIND_VERSION_SHORT_NODOT}" GREATER 18  OR  "${_RUBY_VERSION_SHORT_NODOT}" GREATER 18  OR  RUBY_HDR_DIR)

# Determine the list of possible names for the ruby library

SET(_RUBY_POSSIBLE_LIB_NAMES ruby ruby-static ruby${_RUBY_VERSION_SHORT} ruby${_RUBY_VERSION_SHORT_NODOT} ruby-${_RUBY_VERSION_SHORT} ruby-${RUBY_VERSION})

IF(WIN32)

   SET( _RUBY_MSVC_RUNTIME "" )

   IF( MSVC60 )

     SET( _RUBY_MSVC_RUNTIME "60" )

   ENDIF( MSVC60 )

   IF( MSVC70 )

     SET( _RUBY_MSVC_RUNTIME "70" )

   ENDIF( MSVC70 )

   IF( MSVC71 )

     SET( _RUBY_MSVC_RUNTIME "71" )

   ENDIF( MSVC71 )

   IF( MSVC80 )

     SET( _RUBY_MSVC_RUNTIME "80" )

   ENDIF( MSVC80 )

   IF( MSVC90 )

     SET( _RUBY_MSVC_RUNTIME "90" )

   ENDIF( MSVC90 )

   LIST(APPEND _RUBY_POSSIBLE_LIB_NAMES

               "msvcr${_RUBY_MSVC_RUNTIME}-ruby${_RUBY_NODOT_VERSION}"

               "msvcr${_RUBY_MSVC_RUNTIME}-ruby${_RUBY_NODOT_VERSION}-static"

               "msvcrt-ruby${_RUBY_NODOT_VERSION}"

               "msvcrt-ruby${_RUBY_NODOT_VERSION}-static" )

ENDIF(WIN32)

FIND_LIBRARY(RUBY_LIBRARY NAMES ${_RUBY_POSSIBLE_LIB_NAMES} HINTS ${RUBY_POSSIBLE_LIB_DIR} )

INCLUDE(FindPackageHandleStandardArgs)

SET(_RUBY_REQUIRED_VARS RUBY_EXECUTABLE RUBY_INCLUDE_DIR RUBY_LIBRARY)

IF(_RUBY_VERSION_SHORT_NODOT GREATER 18)

   LIST(APPEND _RUBY_REQUIRED_VARS RUBY_CONFIG_INCLUDE_DIR)

ENDIF(_RUBY_VERSION_SHORT_NODOT GREATER 18)

IF(_RUBY_DEBUG_OUTPUT)

   MESSAGE(STATUS "--------FindRuby.cmake debug------------")

   MESSAGE(STATUS "_RUBY_POSSIBLE_EXECUTABLE_NAMES: ${_RUBY_POSSIBLE_EXECUTABLE_NAMES}")

   MESSAGE(STATUS "_RUBY_POSSIBLE_LIB_NAMES: ${_RUBY_POSSIBLE_LIB_NAMES}")

   MESSAGE(STATUS "RUBY_ARCH_DIR: ${RUBY_ARCH_DIR}")

   MESSAGE(STATUS "RUBY_HDR_DIR: ${RUBY_HDR_DIR}")

   MESSAGE(STATUS "RUBY_POSSIBLE_LIB_DIR: ${RUBY_POSSIBLE_LIB_DIR}")

   MESSAGE(STATUS "Found RUBY_VERSION: \"${RUBY_VERSION}\" , short: \"${_RUBY_VERSION_SHORT}\", nodot: \"${_RUBY_VERSION_SHORT_NODOT}\"")

   MESSAGE(STATUS "_RUBY_REQUIRED_VARS: ${_RUBY_REQUIRED_VARS}")

   MESSAGE(STATUS "RUBY_EXECUTABLE: ${RUBY_EXECUTABLE}")

   MESSAGE(STATUS "RUBY_LIBRARY: ${RUBY_LIBRARY}")

   MESSAGE(STATUS "RUBY_INCLUDE_DIR: ${RUBY_INCLUDE_DIR}")

   MESSAGE(STATUS "RUBY_CONFIG_INCLUDE_DIR: ${RUBY_CONFIG_INCLUDE_DIR}")

   MESSAGE(STATUS "--------------------")

ENDIF(_RUBY_DEBUG_OUTPUT)

FIND_PACKAGE_HANDLE_STANDARD_ARGS(Ruby  REQUIRED_VARS  ${_RUBY_REQUIRED_VARS}

                                        VERSION_VAR RUBY_VERSION )

MARK_AS_ADVANCED(

  RUBY_EXECUTABLE

  RUBY_LIBRARY

  RUBY_INCLUDE_DIR

  RUBY_CONFIG_INCLUDE_DIR

  )

# Set some variables for compatibility with previous version of this file

SET(RUBY_POSSIBLE_LIB_PATH ${RUBY_POSSIBLE_LIB_DIR})

SET(RUBY_RUBY_LIB_PATH ${RUBY_RUBY_LIB_DIR})

SET(RUBY_INCLUDE_PATH ${RUBY_INCLUDE_DIRS})