matrixfurry.com
The open source OpenXR runtime
1#
2# Internal file for GetGitRevisionDescription.cmake
3#
4# Requires CMake 2.6 or newer (uses the 'function' command)
5#
6# Original Author:
7# 2009-2023 Rylie Pavlik <rylie@ryliepavlik.com>
8# https://ryliepavlik.com/
9# Iowa State University HCI Graduate Program/VRAC
10#
11# Copyright 2009-2012, Iowa State University
12# Copyright 2011-2023, Contributors
13#
14# Distributed under the Boost Software License, Version 1.0.
15# (See accompanying file LICENSE_1_0.txt or copy at
16# http://www.boost.org/LICENSE_1_0.txt)
17#
18# SPDX-License-Identifier: BSL-1.0
19
20set(HEAD_HASH)
21
22file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024)
23
24string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS)
25if(HEAD_CONTENTS MATCHES "ref")
26 # named branch
27 string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}")
28 if(EXISTS "@GIT_DIR@/${HEAD_REF}")
29 configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY)
30 else()
31 if(EXISTS "@GIT_DIR@/packed-refs")
32 configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs"
33 COPYONLY)
34 file(READ "@GIT_DATA@/packed-refs" PACKED_REFS)
35 if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}")
36 set(HEAD_HASH "${CMAKE_MATCH_1}")
37 endif()
38 endif()
39 endif()
40else()
41 # detached HEAD
42 configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY)
43endif()
44
45if(NOT HEAD_HASH)
46 file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024)
47 string(STRIP "${HEAD_HASH}" HEAD_HASH)
48endif()