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# Original source:
# PISM: a Parallel Ice Sheet Model,
# http://www.pism-docs.org/
# http://svn.gna.org/viewcvs/*checkout*/pism/trunk/CMake/FindGit.cmake?rev=569
#
# Licence:
# GPL-2,
# http://svn.gna.org/viewcvs/*checkout*/pism/trunk/COPYING?rev=569
SET(Git_FOUND FALSE)
FIND_PROGRAM(Git_EXECUTABLE git DOC "git command line client")
MARK_AS_ADVANCED(Git_EXECUTABLE)
IF(Git_EXECUTABLE)
SET(Git_FOUND TRUE)
MACRO(Git_WC_INFO dir prefix)
EXECUTE_PROCESS(COMMAND ${Git_EXECUTABLE} rev-list -n 1 HEAD
WORKING_DIRECTORY ${dir}
RESULT_VARIABLE Git_result
OUTPUT_VARIABLE ${prefix}_WC_REVISION_HASH
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
IF(NOT ((${Git_result} EQUAL 0) AND (NOT ${${prefix}_WC_REVISION_HASH} MATCHES "^$")))
# MESSAGE(STATUS "Unable to find a git setup.")
UNSET(${prefix}_WC_REVISION_HASH)
ELSE(NOT ((${Git_result} EQUAL 0) AND (NOT ${${prefix}_WC_REVISION_HASH} MATCHES "^$")))
EXECUTE_PROCESS(COMMAND ${Git_EXECUTABLE} rev-list -n 1 --abbrev-commit HEAD
WORKING_DIRECTORY ${dir}
RESULT_VARIABLE Git_result
OUTPUT_VARIABLE ${prefix}_WC_REVISION_HASH_SHORT
OUTPUT_STRIP_TRAILING_WHITESPACE
ERROR_QUIET)
# MESSAGE(STATUS "Found git HEAD: ${${prefix}_WC_REVISION_HASH_SHORT}")
EXECUTE_PROCESS(COMMAND ${Git_EXECUTABLE} rev-list --grep=git-svn-id: -n 1 HEAD
WORKING_DIRECTORY ${dir}
RESULT_VARIABLE Git_result2
OUTPUT_VARIABLE ${prefix}_WC_SVN_REVISION_HASH
OUTPUT_STRIP_TRAILING_WHITESPACE)
IF(NOT ((${Git_result2} EQUAL 0) AND (NOT ${${prefix}_WC_SVN_REVISION_HASH} MATCHES "^$")))
# MESSAGE(STATUS "Unable to find a git-svn setup.")
UNSET(${prefix}_WC_SVN_REVISION_HASH)
ELSE(NOT ((${Git_result2} EQUAL 0) AND (NOT ${${prefix}_WC_SVN_REVISION_HASH} MATCHES "^$")))
# MESSAGE(STATUS "Latest commit also in SVN is ${${prefix}_WC_REVISION_HASH}")
EXECUTE_PROCESS(COMMAND ${Git_EXECUTABLE} svn find-rev ${${prefix}_WC_SVN_REVISION_HASH}
WORKING_DIRECTORY ${dir}
RESULT_VARIABLE Git_result3
OUTPUT_VARIABLE ${prefix}_WC_SVN_REVISION
OUTPUT_STRIP_TRAILING_WHITESPACE)
IF((${Git_result3} EQUAL 0) AND (NOT ${${prefix}_WC_SVN_REVISION} MATCHES "^$"))
# MESSAGE(STATUS " which is in SVN as revision ${${prefix}_WC_SVN_REVISION}")
ELSE((${Git_result3} EQUAL 0) AND (NOT ${${prefix}_WC_SVN_REVISION} MATCHES "^$"))
# MESSAGE(WARNING "Unable to determine the SVN revision number!")
UNSET(${prefix}_WC_SVN_REVISION)
ENDIF((${Git_result3} EQUAL 0) AND (NOT ${${prefix}_WC_SVN_REVISION} MATCHES "^$"))
ENDIF(NOT ((${Git_result2} EQUAL 0) AND (NOT ${${prefix}_WC_SVN_REVISION_HASH} MATCHES "^$")))
ENDIF(NOT ((${Git_result} EQUAL 0) AND (NOT ${${prefix}_WC_REVISION_HASH} MATCHES "^$")))
ENDMACRO(Git_WC_INFO)
ENDIF(Git_EXECUTABLE)
IF(NOT Git_FOUND)
IF(NOT Git_FIND_QUIETLY)
MESSAGE(STATUS "Git was not found")
ELSE(NOT Git_FIND_QUIETLY)
if(Git_FIND_REQUIRED)
MESSAGE(FATAL_ERROR "Git was not found")
ENDIF(Git_FIND_REQUIRED)
ENDIF(NOT Git_FIND_QUIETLY)
ENDIF(NOT Git_FOUND)
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