cmake/FindGem.cmake.in

   1 #=============================================================================
   2 # Copyright (c) 2019 Harald Sitter <sitter@kde.org>
   3 #
   4 # Redistribution and use in source and binary forms, with or without
   5 # modification, are permitted provided that the following conditions
   6 # are met:
   7 #
   8 # 1. Redistributions of source code must retain the copyright
   9 #    notice, this list of conditions and the following disclaimer.
  10 # 2. Redistributions in binary form must reproduce the copyright
  11 #    notice, this list of conditions and the following disclaimer in the
  12 #    documentation and/or other materials provided with the distribution.
  13 # 3. The name of the author may not be used to endorse or promote products
  14 #    derived from this software without specific prior written permission.
  15 #
  16 # THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  17 # IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  18 # OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  19 # IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  20 # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  21 # NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  22 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  23 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  24 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  25 # THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26 #=============================================================================
  27
  28 find_program(RUBY_EXE ruby)
  29 if(NOT RUBY_EXE)
  30     message(WARNING "Could not find ruby program")
  31     return()
  32 endif()
  33
  34 execute_process(
  35     COMMAND ${RUBY_EXE} -e "require '@GEM_NAME@'"
  36     ERROR_VARIABLE ERROR_VAR
  37     RESULT_VARIABLE RESULT_VAR
  38 )
  39
  40 if(RESULT_VAR EQUAL 0)
  41     set(@GEM_PACKAGE@_FOUND TRUE)
  42 else()
  43     message(WARNING ${ERROR_VAR})
  44     return()
  45 endif()
  46
  47 include(FindPackageHandleStandardArgs)
  48 find_package_handle_standard_args(@GEM_PACKAGE@
  49     FOUND_VAR
  50         @GEM_PACKAGE@_FOUND
  51     REQUIRED_VARS
  52         @GEM_PACKAGE@_FOUND
  53 )