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

#[=======================================================================[.rst:
FindCABLE
---------

Find CABLE

This module finds if CABLE is installed and determines where the
include files and libraries are.  This code sets the following
variables:

::

  CABLE             the path to the cable executable
  CABLE_TCL_LIBRARY the path to the Tcl wrapper library
  CABLE_INCLUDE_DIR the path to the include directory


To build Tcl wrappers, you should add shared library and link it to
${CABLE_TCL_LIBRARY}.  You should also add ${CABLE_INCLUDE_DIR} as an
include directory.
#]=======================================================================]

if(NOT CABLE)
  find_path(CABLE_BUILD_DIR cableVersion.h)
endif()

if(CABLE_BUILD_DIR)
  load_cache(${CABLE_BUILD_DIR}
             EXCLUDE
               BUILD_SHARED_LIBS
               LIBRARY_OUTPUT_PATH
               EXECUTABLE_OUTPUT_PATH
               MAKECOMMAND
               CMAKE_INSTALL_PREFIX
             INCLUDE_INTERNALS
               CABLE_LIBRARY_PATH
               CABLE_EXECUTABLE_PATH)

  if(CABLE_LIBRARY_PATH)
    find_library(CABLE_TCL_LIBRARY NAMES CableTclFacility PATHS
                 ${CABLE_LIBRARY_PATH}
                 ${CABLE_LIBRARY_PATH}/*)
  else()
    find_library(CABLE_TCL_LIBRARY NAMES CableTclFacility PATHS
                 ${CABLE_BINARY_DIR}/CableTclFacility
                 ${CABLE_BINARY_DIR}/CableTclFacility/*)
  endif()

  if(CABLE_EXECUTABLE_PATH)
    find_program(CABLE NAMES cable PATHS
                 ${CABLE_EXECUTABLE_PATH}
                 ${CABLE_EXECUTABLE_PATH}/*)
  else()
    find_program(CABLE NAMES cable PATHS
                 ${CABLE_BINARY_DIR}/Executables
                 ${CABLE_BINARY_DIR}/Executables/*)
  endif()

  find_path(CABLE_INCLUDE_DIR CableTclFacility/ctCalls.h
            ${CABLE_SOURCE_DIR})
else()
  # Find the cable executable in the path.
  find_program(CABLE NAMES cable)

  # Get the path where the executable sits, but without the executable
  # name on it.
  get_filename_component(CABLE_ROOT_BIN ${CABLE} PATH)

  # Find the cable include directory in a path relative to the cable
  # executable.
  find_path(CABLE_INCLUDE_DIR CableTclFacility/ctCalls.h
            ${CABLE_ROOT_BIN}/../include/Cable)

  # Find the WrapTclFacility library in a path relative to the cable
  # executable.
  find_library(CABLE_TCL_LIBRARY NAMES CableTclFacility PATHS
               ${CABLE_ROOT_BIN}/../lib/Cable)
endif()