QGIS/cmake/FindPyQt5.cmake

# Find PyQt5
# ~~~~~~~~~~
# Copyright (c) 2007-2008, Simon Edwards <simon@simonzone.com>
# Redistribution and use is allowed according to the terms of the BSD license.
# For details see the accompanying COPYING-CMAKE-SCRIPTS file.
#
# PyQt5 website: http://www.riverbankcomputing.co.uk/pyqt/index.php
#
# Find the installed version of PyQt5. FindPyQt5 should only be called after
# Python has been found.
#
# This file defines the following variables:
#
# PYQT5_VERSION_STR - The version of PyQt5 as a human readable string.
#
# PYQT5_SIP_DIR - The directory holding the PyQt5 .sip files.
#
# PYQT5_SIP_FLAGS - The SIP flags used to build PyQt.

IF(EXISTS PYQT5_VERSION_STR)
  # Already in cache, be silent
  SET(PYQT5_FOUND TRUE)
ELSE(EXISTS PYQT5_VERSION_STR)

  IF(SIP_BUILD_EXECUTABLE)
    # SIP >= 5.0 path

    FILE(GLOB _pyqt5_metadata "${Python_SITEARCH}/PyQt5-*.dist-info/METADATA")
    IF(_pyqt5_metadata)
      FILE(READ ${_pyqt5_metadata} _pyqt5_metadata_contents)
      STRING(REGEX REPLACE ".*\nVersion: ([^\n]+).*$" "\\1" PYQT5_VERSION_STR ${_pyqt5_metadata_contents})
    ELSE(_pyqt5_metadata)
      EXECUTE_PROCESS(COMMAND ${Python_EXECUTABLE} -c "from PyQt5.QtCore import PYQT_VERSION_STR; print(PYQT_VERSION_STR)" OUTPUT_VARIABLE PYQT5_VERSION_STR)
    ENDIF(_pyqt5_metadata)

    IF(PYQT5_VERSION_STR)
      EXECUTE_PROCESS(COMMAND ${Python_EXECUTABLE} -c "import os; import PyQt5; print(os.path.dirname(PyQt5.__file__), end='')" OUTPUT_VARIABLE PYQT5_MOD_DIR)
      SET(PYQT5_SIP_DIR "${PYQT5_MOD_DIR}/bindings")
      FIND_PROGRAM(__pyuic5 "pyuic5")
      GET_FILENAME_COMPONENT(PYQT5_BIN_DIR ${__pyuic5} DIRECTORY)

      SET(PYQT5_FOUND TRUE)
    ENDIF(PYQT5_VERSION_STR)

  ELSE(SIP_BUILD_EXECUTABLE)
    # SIP 4.x path

    FIND_FILE(_find_pyqt5_py FindPyQt5.py PATHS ${CMAKE_MODULE_PATH} NO_CMAKE_FIND_ROOT_PATH)

    EXECUTE_PROCESS(COMMAND ${Python_EXECUTABLE} ${_find_pyqt5_py} OUTPUT_VARIABLE pyqt_config)
    IF(pyqt_config)
      STRING(REGEX REPLACE "^pyqt_version_str:([^\n]+).*$" "\\1" PYQT5_VERSION_STR ${pyqt_config})
      STRING(REGEX REPLACE ".*\npyqt_mod_dir:([^\n]+).*$" "\\1" PYQT5_MOD_DIR ${pyqt_config})
      STRING(REGEX REPLACE ".*\npyqt_sip_dir:([^\n]+).*$" "\\1" PYQT5_SIP_DIR ${pyqt_config})
      IF(EXISTS ${PYQT5_SIP_DIR}/Qt5)
        SET(PYQT5_SIP_DIR ${PYQT5_SIP_DIR}/Qt5)
      ENDIF(EXISTS ${PYQT5_SIP_DIR}/Qt5)
      STRING(REGEX REPLACE ".*\npyqt_sip_flags:([^\n]+).*$" "\\1" PYQT5_SIP_FLAGS ${pyqt_config})
      STRING(REGEX REPLACE ".*\npyqt_bin_dir:([^\n]+).*$" "\\1" PYQT5_BIN_DIR ${pyqt_config})
      STRING(REGEX REPLACE ".*\npyqt_sip_module:([^\n]+).*$" "\\1" PYQT5_SIP_IMPORT ${pyqt_config})
      SET(PYQT5_FOUND TRUE)
    ENDIF(pyqt_config)

  ENDIF(SIP_BUILD_EXECUTABLE)

  IF(PYQT5_FOUND)
    IF(NOT PyQt5_FIND_QUIETLY)
      MESSAGE(STATUS "Found PyQt5 version: ${PYQT5_VERSION_STR}")
    ENDIF(NOT PyQt5_FIND_QUIETLY)
  ELSE(PYQT5_FOUND)
    IF(PyQt5_FIND_REQUIRED)
      MESSAGE(FATAL_ERROR "Could not find PyQt5")
    ENDIF(PyQt5_FIND_REQUIRED)
  ENDIF(PYQT5_FOUND)

ENDIF(EXISTS PYQT5_VERSION_STR)