2022-07-27 20:06:50 +02:00
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# SPDX-FileCopyrightText: 2009 Iowa State University
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# SPDX-FileContributor: Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
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# SPDX-License-Identifier: BSL-1.0
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2020-12-28 16:15:37 +01:00
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# Internal file for GetGitRevisionDescription.cmake
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#
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# Requires CMake 2.6 or newer (uses the 'function' command)
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#
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# Original Author:
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# 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net>
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# http://academic.cleardefinition.com
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# Iowa State University HCI Graduate Program/VRAC
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#
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# Copyright Iowa State University 2009-2010.
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# Distributed under the Boost Software License, Version 1.0.
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# (See accompanying file LICENSE_1_0.txt or copy at
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# http://www.boost.org/LICENSE_1_0.txt)
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set(HEAD_HASH)
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file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024)
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string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS)
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if(HEAD_CONTENTS MATCHES "ref")
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# named branch
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string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}")
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if(EXISTS "@GIT_DIR@/${HEAD_REF}")
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configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
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elseif(EXISTS "@GIT_DIR@/logs/${HEAD_REF}")
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configure_file("@GIT_DIR@/logs/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
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set(HEAD_HASH "${HEAD_REF}")
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endif()
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else()
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# detached HEAD
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configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
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endif()
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if(NOT HEAD_HASH)
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if(EXISTS "@GIT_DATA@/head-ref")
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file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
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string(STRIP "${HEAD_HASH}" HEAD_HASH)
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else()
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set(HEAD_HASH "Unknown")
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endif()
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endif()
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