# ----------------------------------------------------------------------
# File: CMakeLists.txt
# Author: Elvin-Alin Sindrilaru <esindril@cern.ch>
# ----------------------------------------------------------------------

# ************************************************************************
# * EOS - the CERN Disk Storage System                                   *
# * Copyright (C) 2019 CERN/Switzerland                                  *
# *                                                                      *
# * This program 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 of the License, or    *
# * (at your option) any later version.                                  *
# *                                                                      *
# * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.*
# ************************************************************************

#-------------------------------------------------------------------------------
# Search for dependencies
#-------------------------------------------------------------------------------
find_program(DOT_EXE "dot")

if(DOT_EXE)
    message(STATUS "dot found: ${DOT_EXE}")
else()
    message(STATUS "dot not found!")
endif()

set(DOT_OUTPUT_TYPE "pdf" CACHE STRING "Build a dependency graph. Options are dot output types: ps, png, pdf..." )

if(DOT_EXE)
  add_custom_target(dependency-graph
    COMMAND ${CMAKE_COMMAND} ${CMAKE_SOURCE_DIR} --graphviz=${CMAKE_BINARY_DIR}/graphviz/${PROJECT_NAME}.dot
    COMMAND ${DOT_EXE} -T${DOT_OUTPUT_TYPE} ${CMAKE_BINARY_DIR}/graphviz/${PROJECT_NAME}.dot -o ${CMAKE_BINARY_DIR}/${PROJECT_NAME}.${DOT_OUTPUT_TYPE})

  add_custom_command(
    TARGET dependency-graph POST_BUILD
    COMMAND ;
    COMMENT
    "Dependency graph generated and located at ${CMAKE_BINARY_DIR}/${PROJECT_NAME}.${DOT_OUTPUT_TYPE}")
endif()