# Copyright 2011 Free Software Foundation, Inc.

# 

# This file is part of GNU Radio

# 

# GNU Radio is free software; you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation; either version 3, or (at your option)

# any later version.

# 

# GNU Radio is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

# 

# You should have received a copy of the GNU General Public License

# along with GNU Radio; see the file COPYING.  If not, write to

# the Free Software Foundation, Inc., 51 Franklin Street,

# Boston, MA 02110-1301, USA.

IF(DEFINED __INCLUDED_GR_VERSION_CMAKE)

    RETURN()

ENDIF()

SET(__INCLUDED_GR_VERSION_CMAKE TRUE)

########################################################################

# Setup version variables.

# Parse the output of git describe

# sets VERSION and LIBVER

########################################################################

UNSET(VERSION)

UNSET(LIBVER)

########################################################################

# Extract the version string from git describe.

########################################################################

FIND_PACKAGE(Git)

IF(GIT_FOUND)

    MESSAGE(STATUS "Extracting version information from git...")

    EXECUTE_PROCESS(COMMAND ${GIT_EXECUTABLE} describe

        OUTPUT_VARIABLE VERSION OUTPUT_STRIP_TRAILING_WHITESPACE

        WORKING_DIRECTORY ${CMAKE_SOURCE_DIR}

    )

    IF(NOT VERSION)

        MESSAGE(WARNING "Tried to extract $VERSION from git describe but failed... using default")

    ENDIF()

ENDIF(GIT_FOUND)

########################################################################

# Extract the library version from the version string.

########################################################################

IF(VERSION)

    INCLUDE(GrPython)

    EXECUTE_PROCESS(COMMAND ${PYTHON_EXECUTABLE} -c "import re; print re.match('^v(\\d+\\.\\d+\\.\\d+)', '${VERSION}').groups()[0]"

        OUTPUT_VARIABLE LIBVER OUTPUT_STRIP_TRAILING_WHITESPACE

    )

    IF(NOT LIBVER)

        MESSAGE(WARNING "Tried to extract $LIBVER from $VERSION but failed... using default")

    ENDIF()

ENDIF()

########################################################################

# Ensure that the version strings are set no matter what.

########################################################################

IF(NOT VERSION)

    SET(VERSION "v3.x.x-unknown")

ENDIF()

IF(NOT LIBVER)

    SET(LIBVER "3.x.x")

ENDIF()

MESSAGE(STATUS "VERSION: ${VERSION}, LIBVER: ${LIBVER}")