# Distributed under the OSI-approved BSD 3-Clause License.  See accompanying
# file LICENSE.rst or https://cmake.org/licensing for details.

#[=======================================================================[.rst:
FindRuby
--------

Finds Ruby installation and the locations of its include files and libraries:

.. code-block:: cmake

  find_package(Ruby [<version>] [...])

Ruby is a general-purpose programming language.  This module supports Ruby
1.8 through 3.4.  Virtual environments, such as RVM or RBENV, are also
supported.

Result Variables
^^^^^^^^^^^^^^^^

This module defines the following variables:

``Ruby_FOUND``
  .. versionadded:: 3.3

  Boolean indicating whether (the requested version of) ruby was found.

``Ruby_VERSION``
  The version of ruby which was found, e.g. ``3.2.6``.

``Ruby_VERSION_MAJOR``
  Ruby major version.

``Ruby_VERSION_MINOR``
  Ruby minor version.

``Ruby_VERSION_PATCH``
  Ruby patch version.

``Ruby_EXECUTABLE``
  The full path to the ruby binary.

``Ruby_INCLUDE_DIRS``
  Include dirs to be used when using the ruby library.

``Ruby_LIBRARIES``
  .. versionadded:: 3.18

  Libraries needed to use ruby from C.

.. versionchanged:: 3.18
  Previous versions of CMake used the ``RUBY_`` prefix for all variables.

Hints
^^^^^

This module accepts the following variables:

``Ruby_FIND_VIRTUALENV``
  .. versionadded:: 3.18

  This variable defines the handling of virtual environments.
  It can be left empty or be set to one of the following values:

  * ``FIRST``: Virtual Ruby environments are searched for first,
               then the system Ruby installation.
               This is the default.
  * ``ONLY``: Only virtual environments are searched
  * ``STANDARD``: Only the system Ruby installation is searched.

  Virtual environments may be provided by:

  ``rvm``
    Requires that the ``MY_RUBY_HOME`` environment environment is defined.

  ``rbenv``
    Requires that ``rbenv`` is installed in ``~/.rbenv/bin``
    or that the ``RBENV_ROOT`` environment variable is defined.

Deprecated Variables
^^^^^^^^^^^^^^^^^^^^

The following variables are provided for backward compatibility:

.. deprecated:: 4.0
  The following variables are deprecated.  See policy :policy:`CMP0185`.

  ``RUBY_FOUND``
    Same as ``Ruby_FOUND``.
  ``RUBY_VERSION``
    Same as ``Ruby_VERSION``.
  ``RUBY_EXECUTABLE``
    Same as ``Ruby_EXECUTABLE``.
  ``RUBY_INCLUDE_DIRS``
    Same as ``Ruby_INCLUDE_DIRS``.
  ``RUBY_INCLUDE_PATH``
    Same as ``Ruby_INCLUDE_DIRS``.
  ``RUBY_LIBRARY``
    Same as ``Ruby_LIBRARY``.

Examples
^^^^^^^^

Finding Ruby and specifying the minimum required version:

.. code-block:: cmake

  find_package(Ruby 3.2.6 EXACT REQUIRED)
  # or
  find_package(Ruby 3.2)
#]=======================================================================]

cmake_policy(GET CMP0185 _Ruby_CMP0185)

if(NOT _Ruby_CMP0185 STREQUAL "NEW")
  # Backwards compatibility
  # Define camel case versions of input variables
  foreach (UPPER
           RUBY_EXECUTABLE
           RUBY_LIBRARY
           RUBY_INCLUDE_DIR
           RUBY_CONFIG_INCLUDE_DIR)
    if (DEFINED ${UPPER})
      string(REPLACE "RUBY_" "Ruby_" Camel ${UPPER})
      if (NOT DEFINED ${Camel})
        set(${Camel} ${${UPPER}})
      endif ()
    endif ()
  endforeach ()
endif()

# Uncomment the following line to get debug output for this file
# set(CMAKE_MESSAGE_LOG_LEVEL DEBUG)

# 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 the user has not specified a Ruby version, create a list of Ruby versions
# to check going from 1.8 to 3.4
if (NOT Ruby_FIND_VERSION_EXACT)
  foreach (_ruby_version RANGE 34 18 -1)
    string(SUBSTRING "${_ruby_version}" 0 1 _ruby_major_version)
    string(SUBSTRING "${_ruby_version}" 1 1 _ruby_minor_version)
    # Append both rubyX.Y and rubyXY (eg: ruby3.4 ruby34)
    list(APPEND _Ruby_POSSIBLE_EXECUTABLE_NAMES ruby${_ruby_major_version}.${_ruby_minor_version} ruby${_ruby_major_version}${_ruby_minor_version})
  endforeach ()
endif ()

# Virtual environment handling
if (DEFINED Ruby_FIND_VIRTUALENV AND NOT Ruby_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY|STANDARD)$")
  message(AUTHOR_WARNING "FindRuby: ${Ruby_FIND_VIRTUALENV}: invalid value for 'Ruby_FIND_VIRTUALENV'. 'FIRST', 'ONLY' or 'STANDARD' expected. 'FIRST' will be used instead.")
  set(Ruby_FIND_VIRTUALENV "FIRST")
elseif (NOT DEFINED Ruby_FIND_VIRTUALENV)
  # Default is to search for virtual environments first
  set(Ruby_FIND_VIRTUALENV "FIRST")
endif ()

# Validate the found Ruby interpreter to make sure that it is
# callable and that its version matches the requested version
function(_RUBY_VALIDATE_INTERPRETER result_var path)
  # Get the interpreter version
  execute_process(COMMAND "${path}" -e "puts RUBY_VERSION"
                  RESULT_VARIABLE result
                  OUTPUT_VARIABLE version
                  ERROR_QUIET
                  OUTPUT_STRIP_TRAILING_WHITESPACE)

  if (NOT result EQUAL 0)
    set(_Ruby_Interpreter_REASON_FAILURE "Cannot use the interpreter \"${path}\"")
    set(${result_var} FALSE PARENT_SCOPE)
    return()
  endif ()

  if (Ruby_FIND_VERSION)
    if (Ruby_FIND_VERSION_EXACT AND NOT version VERSION_EQUAL Ruby_FIND_VERSION)
      message(DEBUG "Incorrect Ruby found. Requested: ${Ruby_FIND_VERSION}. Found: ${version}. Path: \"${path}\"")
      set(${result_var} FALSE PARENT_SCOPE)
      return()
    elseif (version VERSION_LESS Ruby_FIND_VERSION)
      message(DEBUG "Ruby version is too old. Minimum: ${Ruby_FIND_VERSION}. Found: ${version}. Path: \"${path}\"")
      set(${result_var} FALSE PARENT_SCOPE)
      return()
    endif ()
  endif ()

  # Found valid Ruby interpreter!
  set(${result_var} TRUE PARENT_SCOPE)
endfunction()

# Query Ruby RBConfig module for the specified variable (_RUBY_CONFIG_VAR)
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)

  # Config was deprecated in Ruby 1.9 and then removed in Ruby 2 - so this is for ancient code
  if (_Ruby_SUCCESS OR _Ruby_OUTPUT STREQUAL "")
    execute_process(COMMAND ${Ruby_EXECUTABLE} -r rbconfig -e "print Config::CONFIG['${RBVAR}']"
                    RESULT_VARIABLE _Ruby_SUCCESS
                    OUTPUT_VARIABLE _Ruby_OUTPUT
                    ERROR_QUIET)
  endif ()

  set(${OUTVAR} "${_Ruby_OUTPUT}" PARENT_SCOPE)
endfunction()

# Check for RVM virtual environments
function(_RUBY_CHECK_RVM)
  if (NOT DEFINED ENV{MY_RUBY_HOME})
    return()
  endif ()

  find_program(Ruby_EXECUTABLE
               NAMES ${_Ruby_POSSIBLE_EXECUTABLE_NAMES}
               NAMES_PER_DIR
               PATHS ENV MY_RUBY_HOME
               PATH_SUFFIXES bin Scripts
               VALIDATOR _RUBY_VALIDATE_INTERPRETER
               NO_CMAKE_PATH
               NO_CMAKE_ENVIRONMENT_PATH
               NO_SYSTEM_ENVIRONMENT_PATH
               NO_CMAKE_SYSTEM_PATH)

  if (Ruby_EXECUTABLE)
    set(Ruby_ENV "RVM" CACHE INTERNAL "Ruby environment")
  endif ()
endfunction()

# Check for RBENV virtual environments
function(_RUBY_CHECK_RBENV)
  find_program(Ruby_RBENV_EXECUTABLE
               NAMES rbenv
               NAMES_PER_DIR
               PATHS "$ENV{HOME}/.rbenv/bin/rbenv" ENV RBENV_ROOT
               PATH_SUFFIXES bin Scripts
               NO_CACHE
               NO_CMAKE_PATH
               NO_CMAKE_ENVIRONMENT_PATH
               NO_CMAKE_SYSTEM_PATH)

  execute_process(COMMAND "${Ruby_RBENV_EXECUTABLE}" "which" "ruby"
                  RESULT_VARIABLE result
                  OUTPUT_VARIABLE ruby_exe
                  ERROR_QUIET
                  OUTPUT_STRIP_TRAILING_WHITESPACE)
  if (NOT result EQUAL 0)
    return()
  endif ()
  cmake_path(GET ruby_exe PARENT_PATH ruby_dir)

  find_program(Ruby_EXECUTABLE
               NAMES ruby
               NAMES_PER_DIR
               PATHS ${ruby_dir}
               VALIDATOR _RUBY_VALIDATE_INTERPRETER
               NO_DEFAULT_PATH)

  if (Ruby_EXECUTABLE)
    set(Ruby_ENV "RBENV" CACHE INTERNAL "Ruby environment")
  endif ()
endfunction()

# Check Ruby installed via Homebrew on macOS
function(_RUBY_CHECK_BREW)
  # Try to locate brew in common locations and in PATH
  find_program(_BREW_EXECUTABLE
          NAMES brew
          NAMES_PER_DIR
          PATHS
          /opt/homebrew/bin      # Apple Silicon default
          /usr/local/bin         # Intel default
          ENV PATH
          NO_CACHE
  )

  if (NOT _BREW_EXECUTABLE)
    return()
  endif ()

  MESSAGE(DEBUG "Found brew at: ${_BREW_EXECUTABLE}")

  # Query Homebrew for the prefix of the 'ruby' formula.
  # If Ruby is not installed via Homebrew, this will fail.
  execute_process(
          COMMAND "${_BREW_EXECUTABLE}" --prefix ruby
          RESULT_VARIABLE _Ruby_BREW_RESULT
          OUTPUT_VARIABLE _Ruby_BREW_DIR
          ERROR_QUIET
          OUTPUT_STRIP_TRAILING_WHITESPACE
  )
  MESSAGE(DEBUG "Ruby BREW is: ${_Ruby_BREW_DIR}")

  if (NOT _Ruby_BREW_RESULT EQUAL 0 OR _Ruby_BREW_DIR STREQUAL "")
    # No 'ruby' formula installed in Homebrew
    return()
  endif ()

  find_program(Ruby_EXECUTABLE
          NAMES ${_Ruby_POSSIBLE_EXECUTABLE_NAMES}
          NAMES_PER_DIR
          PATHS "${_Ruby_BREW_DIR}/bin"
          VALIDATOR _RUBY_VALIDATE_INTERPRETER
          NO_DEFAULT_PATH
  )

  if (Ruby_EXECUTABLE)
    set(Ruby_ENV "BREW" CACHE INTERNAL "Ruby environment")
  endif ()
endfunction()

# Check system installed Ruby
function(_RUBY_CHECK_SYSTEM)
  find_program(Ruby_EXECUTABLE
               NAMES ${_Ruby_POSSIBLE_EXECUTABLE_NAMES}
               NAMES_PER_DIR
               VALIDATOR _RUBY_VALIDATE_INTERPRETER)

  if (Ruby_EXECUTABLE)
    set(Ruby_ENV "Standard" CACHE INTERNAL "Ruby environment")
  endif ()
endfunction()

# Find Ruby
if (NOT Ruby_EXECUTABLE AND Ruby_FIND_VIRTUALENV MATCHES "^(FIRST|ONLY)$")
  # First check for RVM virtual environments
  _RUBY_CHECK_RVM()
  # Second check for RBENV virtual environments
  if (NOT Ruby_EXECUTABLE)
    _RUBY_CHECK_RBENV()
  endif ()
endif ()

# Check for Homebrew Ruby (non-virtualenv, common on MacOS)
if (NOT Ruby_EXECUTABLE AND NOT Ruby_FIND_VIRTUALENV STREQUAL "ONLY")
  _RUBY_CHECK_BREW()
endif ()

# Fallback to system installed Ruby
if (NOT Ruby_EXECUTABLE AND NOT Ruby_FIND_VIRTUALENV STREQUAL "ONLY")
  _RUBY_CHECK_SYSTEM()
endif ()

# We found a new Ruby or a Ruby that is different than the last one we found.
# So reload a number of variables by querying the Ruby interpreter.
if (Ruby_EXECUTABLE AND NOT Ruby_EXECUTABLE STREQUAL "${_Ruby_EXECUTABLE_LAST_QUERIED}")
  # 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("rubyarchhdrdir" Ruby_ARCHHDR_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 vendor-specific -e "print 'true'"
                  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 ()

  # save the results in the cache so we don't have to run ruby the next time again
  set(_Ruby_EXECUTABLE_LAST_QUERIED "${Ruby_EXECUTABLE}" CACHE INTERNAL "The ruby executable last queried for version and path info")
  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 INTERNAL "The Ruby arch dir" FORCE)
  set(Ruby_HDR_DIR ${Ruby_HDR_DIR} CACHE INTERNAL "The Ruby header dir (1.9+)" FORCE)
  set(Ruby_ARCHHDR_DIR ${Ruby_ARCHHDR_DIR} CACHE INTERNAL "The Ruby arch header dir (2.0+)" FORCE)
  set(_Ruby_POSSIBLE_LIB_DIR ${_Ruby_POSSIBLE_LIB_DIR} CACHE INTERNAL "The Ruby lib dir" FORCE)
  set(Ruby_RUBY_LIB_DIR ${Ruby_RUBY_LIB_DIR} CACHE INTERNAL "The Ruby ruby-lib dir" FORCE)
  set(Ruby_SITEARCH_DIR ${Ruby_SITEARCH_DIR} CACHE INTERNAL "The Ruby site arch dir" FORCE)
  set(Ruby_SITELIB_DIR ${Ruby_SITELIB_DIR} CACHE INTERNAL "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 INTERNAL "The Ruby vendor arch dir" FORCE)
  set(Ruby_VENDORLIB_DIR ${Ruby_VENDORLIB_DIR} CACHE INTERNAL "The Ruby vendor lib dir" FORCE)

  mark_as_advanced(
      Ruby_ARCH_DIR
      Ruby_ARCH
      Ruby_HDR_DIR
      Ruby_ARCHHDR_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 ()

# 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 (${Ruby_EXECUTABLE} MATCHES "ruby1\\.?9")
    set(Ruby_VERSION_MAJOR 1)
    set(Ruby_VERSION_MINOR 9)
  endif ()
  # check whether we found 2.[0-7].x
  if (${Ruby_EXECUTABLE} MATCHES "ruby2")
    set(Ruby_VERSION_MAJOR 2)
    string(REGEX_REPLACE ${Ruby_EXECUTABLE} "ruby2\\.?([0-7])" "\\1" Ruby_VERSION_MINOR)
  endif ()
  # check whether we found 3.[0-1].x
  if (${Ruby_EXECUTABLE} MATCHES "ruby3")
    set(Ruby_VERSION_MAJOR 3)
    string(REGEX_REPLACE ${Ruby_EXECUTABLE} "ruby3\\.?([0-1])" "\\1" Ruby_VERSION_MINOR)
  endif ()
endif ()

if (Ruby_VERSION_MAJOR)
  set(Ruby_VERSION "${Ruby_VERSION_MAJOR}.${Ruby_VERSION_MINOR}.${Ruby_VERSION_PATCH}")
  set(_Ruby_VERSION_NODOT "${Ruby_VERSION_MAJOR}${Ruby_VERSION_MINOR}${Ruby_VERSION_PATCH}")
  set(_Ruby_VERSION_NODOT_ZERO_PATCH "${Ruby_VERSION_MAJOR}${Ruby_VERSION_MINOR}0")
  set(_Ruby_VERSION_SHORT "${Ruby_VERSION_MAJOR}.${Ruby_VERSION_MINOR}")
  set(_Ruby_VERSION_SHORT_NODOT "${Ruby_VERSION_MAJOR}${Ruby_VERSION_MINOR}")
endif ()

# FIXME: Currently we require both the interpreter and development components to be found
# in order to use either.  See issue #20474.

find_path(Ruby_INCLUDE_DIR
        NAMES ruby.h
        HINTS ${Ruby_HDR_DIR})

find_path(Ruby_CONFIG_INCLUDE_DIR
        NAMES ruby/config.h config.h
        HINTS ${Ruby_ARCHHDR_DIR})

set(Ruby_INCLUDE_DIRS ${Ruby_INCLUDE_DIR} ${Ruby_CONFIG_INCLUDE_DIR})

# Determine the list of possible names for the ruby library
set(_Ruby_POSSIBLE_LIB_NAMES
  ruby
  ruby-static
  ruby-${Ruby_VERSION}
  ruby${_Ruby_VERSION_NODOT}
  ruby${_Ruby_VERSION_NODOT_ZERO_PATCH}
  ruby-${_Ruby_VERSION_SHORT}
  ruby${_Ruby_VERSION_SHORT}
  ruby${_Ruby_VERSION_SHORT_NODOT}
)

if (WIN32)
  set(_Ruby_POSSIBLE_RUNTIMES "ucrt;msvcrt;vcruntime140;vcruntime140_1;vcruntime${MSVC_TOOLSET_VERSION}")
  set(_Ruby_POSSIBLE_VERSION_SUFFIXES "${_Ruby_VERSION_NODOT};${_Ruby_VERSION_NODOT_ZERO_PATCH}")

  if (CMAKE_SIZEOF_VOID_P EQUAL 8)
    set(_Ruby_POSSIBLE_ARCH_PREFIXES "libx64-;x64-")
  else ()
    set(_Ruby_POSSIBLE_ARCH_PREFIXES "lib")
  endif ()

  foreach (_Ruby_RUNTIME ${_Ruby_POSSIBLE_RUNTIMES})
    foreach (_Ruby_VERSION_SUFFIX ${_Ruby_POSSIBLE_VERSION_SUFFIXES})
      foreach (_Ruby_ARCH_PREFIX ${_Ruby_POSSIBLE_ARCH_PREFIXES})
        list(APPEND _Ruby_POSSIBLE_LIB_NAMES
             "${_Ruby_ARCH_PREFIX}${_Ruby_RUNTIME}-ruby${_Ruby_VERSION_SUFFIX}"
             "${_Ruby_ARCH_PREFIX}${_Ruby_RUNTIME}-ruby${_Ruby_VERSION_SUFFIX}-static")
      endforeach ()
    endforeach ()
  endforeach ()
endif ()

# Save CMAKE_FIND_FRAMEWORK
set(_Ruby_CMAKE_FIND_FRAMEWORK_ORIGINAL ${CMAKE_FIND_FRAMEWORK})

# Avoid finding the ancient Ruby framework included in macOS.
set(CMAKE_FIND_FRAMEWORK LAST)

find_library(Ruby_LIBRARY
        NAMES ${_Ruby_POSSIBLE_LIB_NAMES}
        HINTS ${_Ruby_POSSIBLE_LIB_DIR})

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 ()

# Restore CMAKE_FIND_FRAMEWORK
set(CMAKE_FIND_FRAMEWORK ${_Ruby_CMAKE_FIND_FRAMEWORK_ORIGINAL})

message(DEBUG "--------FindRuby.cmake debug------------")
message(DEBUG "_Ruby_POSSIBLE_EXECUTABLE_NAMES: ${_Ruby_POSSIBLE_EXECUTABLE_NAMES}")
message(DEBUG "_Ruby_POSSIBLE_LIB_DIR: ${_Ruby_POSSIBLE_LIB_DIR}")
message(DEBUG "_Ruby_POSSIBLE_LIB_NAMES: ${_Ruby_POSSIBLE_LIB_NAMES}")
message(DEBUG "Ruby_FIND_VIRTUALENV=${Ruby_FIND_VIRTUALENV}")
message(DEBUG "Ruby_ENV: ${Ruby_ENV}")
message(DEBUG "Found Ruby_VERSION: \"${Ruby_VERSION}\"")
message(DEBUG "Ruby_EXECUTABLE: ${Ruby_EXECUTABLE}")
message(DEBUG "Ruby_LIBRARY: ${Ruby_LIBRARY}")
message(DEBUG "Ruby_INCLUDE_DIR: ${Ruby_INCLUDE_DIR}")
message(DEBUG "Ruby_CONFIG_INCLUDE_DIR: ${Ruby_CONFIG_INCLUDE_DIR}")
message(DEBUG "Ruby_HDR_DIR: ${Ruby_HDR_DIR}")
message(DEBUG "Ruby_ARCH_DIR: ${Ruby_ARCH_DIR}")
message(DEBUG "Ruby_ARCHHDR_DIR: ${Ruby_ARCHHDR_DIR}")
message(DEBUG "--------------------")

include(FindPackageHandleStandardArgs)
find_package_handle_standard_args(Ruby REQUIRED_VARS ${_Ruby_REQUIRED_VARS}
                                  VERSION_VAR Ruby_VERSION)

if (Ruby_FOUND)
  set(Ruby_LIBRARIES ${Ruby_LIBRARY})
endif ()

mark_as_advanced(
    Ruby_EXECUTABLE
    Ruby_LIBRARY
    Ruby_INCLUDE_DIR
    Ruby_CONFIG_INCLUDE_DIR
)

if(NOT _Ruby_CMP0185 STREQUAL "NEW")
  # Set some variables for compatibility with previous version of this file (no need to provide a CamelCase version of that...)
  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})

  # Backwards compatibility
  # Define upper case versions of output variables
  foreach (Camel
           Ruby_EXECUTABLE
           Ruby_INCLUDE_DIRS
           Ruby_LIBRARY
           Ruby_VERSION
           Ruby_VERSION_MAJOR
           Ruby_VERSION_MINOR
           Ruby_VERSION_PATCH

           Ruby_ARCH_DIR
           Ruby_ARCH
           Ruby_HDR_DIR
           Ruby_ARCHHDR_DIR
           Ruby_RUBY_LIB_DIR
           Ruby_SITEARCH_DIR
           Ruby_SITELIB_DIR
           Ruby_HAS_VENDOR_RUBY
           Ruby_VENDORARCH_DIR
           Ruby_VENDORLIB_DIR)
    string(TOUPPER ${Camel} UPPER)
    set(${UPPER} ${${Camel}})
  endforeach ()
endif()