################################################################################
##
## The University of Illinois/NCSA
## Open Source License (NCSA)
##
## Copyright (c) 2014-2017, Advanced Micro Devices, Inc. All rights reserved.
##
## Developed by:
##
##                 AMD Research and AMD HSA Software Development
##
##                 Advanced Micro Devices, Inc.
##
##                 www.amd.com
##
## Permission is hereby granted, free of charge, to any person obtaining a copy
## of this software and associated documentation files (the "Software"), to
## deal with the Software without restriction, including without limitation
## the rights to use, copy, modify, merge, publish, distribute, sublicense,
## and#or sell copies of the Software, and to permit persons to whom the
## Software is furnished to do so, subject to the following conditions:
##
##  - Redistributions of source code must retain the above copyright notice,
##    this list of conditions and the following disclaimers.
##  - Redistributions in binary form must reproduce the above copyright
##    notice, this list of conditions and the following disclaimers in
##    the documentation and#or other materials provided with the distribution.
##  - Neither the names of Advanced Micro Devices, Inc,
##    nor the names of its contributors may be used to endorse or promote
##    products derived from this Software without specific prior written
##    permission.
##
## THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
## IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
## FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
## THE CONTRIBUTORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
## OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
## ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
## DEALINGS WITH THE SOFTWARE.
##
################################################################################

## Parses the VERSION_STRING variable and places
## the first, second and third number values in
## the major, minor and patch variables.
function( parse_version VERSION_STRING )

  # Get index of '-' character in input string
  string ( FIND ${VERSION_STRING} "-" STRING_INDEX )

  # If there is string after '-' character, capture
  # it in COMMIT_INFO string
  if ( ${STRING_INDEX} GREATER -1 )
    math ( EXPR STRING_INDEX "${STRING_INDEX} + 1" )
    string ( SUBSTRING ${VERSION_STRING} ${STRING_INDEX} -1 COMMIT_INFO )
  endif ()

  # Parse string into tokens that consist of only numerical
  # substrings and obtain it as a list
  string ( REGEX MATCHALL "[0123456789]+" TOKENS ${VERSION_STRING} )
  list ( LENGTH TOKENS TOKEN_COUNT )

  # Get Major Id of the version
  if ( ${TOKEN_COUNT} GREATER 0)
    list ( GET TOKENS 0 MAJOR )
    set ( VERSION_MAJOR ${MAJOR} PARENT_SCOPE )
  endif ()

  # Get Minor Id of the version
  if ( ${TOKEN_COUNT} GREATER 1 )
    list ( GET TOKENS 1 MINOR )
    set ( VERSION_MINOR ${MINOR} PARENT_SCOPE )
  endif ()
    
  # Get Patch Id of the version
  if ( ${TOKEN_COUNT} GREATER 2 )
    list ( GET TOKENS 2 PATCH )
    set ( VERSION_PATCH ${PATCH} PARENT_SCOPE )
  endif ()

  # Return if commit info is not present
  if ( NOT DEFINED COMMIT_INFO )
    return()
  endif()
  
  # Parse Commit string if present into number of
  # commits and hash of last commit
  string ( FIND ${COMMIT_INFO} "-" STRING_INDEX )
  if ( ${STRING_INDEX} GREATER -1 )
      math ( EXPR STRING_INDEX "${STRING_INDEX} + 1" )
      string ( SUBSTRING ${COMMIT_INFO} ${STRING_INDEX} -1 COMMIT_HASH )
  endif ()

  string ( REGEX MATCHALL "[0123456789]+" TOKENS ${COMMIT_INFO} )
  list ( LENGTH TOKENS TOKEN_COUNT )

  if ( ${TOKEN_COUNT} GREATER 0)
    list ( GET TOKENS 0 COMMIT_CNT )
  endif ()

  # Add Build Info from Jenkins
  set ( ROCM_BUILD_ID "DevBld" CACHE STRING "Jenkins Build Id" )
   
  # Update Version Patch to include Number of Commits and hash of HEAD
  set ( VERSION_PATCH "${PATCH}.${COMMIT_CNT}-${ROCM_BUILD_ID}-${COMMIT_HASH}" PARENT_SCOPE )

endfunction ()

## Gets the current version of the repository
## using versioning tags and git describe.
## Passes back a packaging version string
## and a library version string.
function ( get_version )

  # Bind the program git that will be
  # used to query its tag that describes
  find_program ( GIT NAMES git )

  if ( GIT )
    execute_process ( COMMAND git describe --long --match [0-9]*
                        WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
                        OUTPUT_VARIABLE GIT_TAG_STRING
                        OUTPUT_STRIP_TRAILING_WHITESPACE
                        RESULT_VARIABLE RESULT )
    if ( ${RESULT} EQUAL 0 )
      parse_version ( ${GIT_TAG_STRING} )
    endif ()
  endif ()

  # Propagate values bound to parent scope
  set( VERSION_MAJOR  "${VERSION_MAJOR}" PARENT_SCOPE )
  set( VERSION_MINOR  "${VERSION_MINOR}" PARENT_SCOPE )
  set( VERSION_PATCH  "${VERSION_PATCH}" PARENT_SCOPE )

endfunction()