cmake_modules/CheckHaskellPackageExists.cmake
author Wuzzy <Wuzzy2@mail.ru>
Tue, 24 Jul 2018 20:07:58 +0200
branch0.9.24
changeset 13550 d42237d16acf
parent 13291 31615a2e0db1
child 15700 a3d2f69f3ac1
permissions -rw-r--r--
Limit max droplet count to 50 (fix for 0.9.24 branch only) This fixes the issue with insane amounts of droplets in 0.9.24. It's temporary, the real fix is in default branch, but would be desyncing.

# Checks if a given Haskell package exists (using ghc-pkg)
# and fails if it's missing.
# Loosely based on CheckLibraryExists.cmake from CMake.
#=============================================================================
# Copyright 2002-2009 Kitware, Inc.
#
# Distributed under the OSI-approved BSD License
#
# This software is distributed WITHOUT ANY WARRANTY; without even the
# implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
# See the License for more information.
#=============================================================================

macro(CHECK_HASKELL_PACKAGE_EXISTS PACKAGE MODULE FUNCTION PARAMCOUNT)
# NOTE: MODULE, FUNCTION and PARAMCOUNT are curretly ignored.
# TODO: Either implement these or drop?

  set(VARIABLE "HS_PACKAGE_${PACKAGE}")
  if(NOT (${VARIABLE} EQUAL "1"))
    message(STATUS "Looking for Haskell package ${PACKAGE} ...")

    execute_process(COMMAND ${GHC_PKG_EXECUTABLE}
                    "latest"
                    ${PACKAGE}
                    "--simple-output"
                    RESULT_VARIABLE COMMAND_RESULT
                    ERROR_VARIABLE BUILD_ERROR
                    OUTPUT_STRIP_TRAILING_WHITESPACE
                    OUTPUT_QUIET
                    )

    if(${COMMAND_RESULT} EQUAL 0)
      message(STATUS "Looking for Haskell package ${PACKAGE} - found")
      set(${VARIABLE} "1" CACHE INTERNAL "Have package ${PACKAGE}")
      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
        "Determining if the Haskell package ${PACKAGE} exists has passed\n\n")
    else()
      message(STATUS "Looking for Haskell package ${PACKAGE} - not found")
      set(${VARIABLE} "0" CACHE INTERNAL "Have package ${PACKAGE}")
      file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
        "Determining if the Haskell package ${PACKAGE} "
        "exists failed with the following output:\n"
        "${BUILD_ERROR}\n\n")
      message(FATAL_ERROR "Haskell package '${PACKAGE}' required")
    endif()
  endif()
endmacro()