# Copyright (c) 2014-2016, The Monero Project
# 
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without modification, are
# permitted provided that the following conditions are met:
# 
# 1. Redistributions of source code must retain the above copyright notice, this list of
#    conditions and the following disclaimer.
# 
# 2. Redistributions in binary form must reproduce the above copyright notice, this list
#    of conditions and the following disclaimer in the documentation and/or other
#    materials provided with the distribution.
# 
# 3. Neither the name of the copyright holder nor the names of its contributors may be
#    used to endorse or promote products derived from this software without specific
#    prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
# THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
# PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
# STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
# THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
# 
# Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers

# Check what commit we're on
execute_process(COMMAND "${GIT}" rev-parse --short HEAD RESULT_VARIABLE RET OUTPUT_VARIABLE COMMIT OUTPUT_STRIP_TRAILING_WHITESPACE)

if(RET)
	# Something went wrong, set the version tag to -unknown
	
    message(WARNING "Cannot determine current commit. Make sure that you are building either from a Git working tree or from a source archive.")
    set(VERSIONTAG "unknown")
    configure_file("src/version.h.in" "${TO}")
else()
	message(STATUS "You are currently on commit ${COMMIT}")
	
	# Get all the tags
	execute_process(COMMAND "${GIT}" show-ref --tags -d --abbrev RESULT_VARIABLE RET OUTPUT_VARIABLE TAGGEDCOMMITOUT OUTPUT_STRIP_TRAILING_WHITESPACE)
	
	# Make sure we actually got some tags
	if(TAGGEDCOMMITOUT)
		string(LENGTH ${TAGGEDCOMMITOUT} TLEN)
	else()
		set(TLEN 1)
	endif()
	
	if(RET OR TLEN LESS 5)
	    message(WARNING "Cannot determine most recent tag. Make sure that you are building either from a Git working tree or from a source archive.")
	    set(VERSIONTAG "${COMMIT}")		
	else()
		# Replace a bunch of things so we end up with a semi-colon separated list
		string(REPLACE " refs/" "\n" TAGGEDCOMMITOUT2 ${TAGGEDCOMMITOUT})
		string(REPLACE "\n" ";" TAGGEDCOMMITLIST ${TAGGEDCOMMITOUT2})
		
		# Grab the second-last item in the list, as that will be the hash of our most recent commit
		list(GET TAGGEDCOMMITLIST -2 TAGGEDCOMMIT)

		if(NOT TAGGEDCOMMIT)
			message(WARNING "Cannot determine most recent tag. Make sure that you are building either from a Git working tree or from a source archive.")
			set(VERSIONTAG "${COMMIT}")
		else()
			message(STATUS "The most recent tag was at ${TAGGEDCOMMIT}")
			
			# Check if we're building that tagged commit or a different one
			if(COMMIT STREQUAL TAGGEDCOMMIT)
				message(STATUS "You are building a tagged release")
				set(VERSIONTAG "release")
			else()
				message(STATUS "You are ahead or behind of a tagged release")
				set(VERSIONTAG "${COMMIT}")
			endif()
		endif()	    

	endif()

    configure_file("src/version.h.in" "${TO}")
endif()