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1 | # |
2 | # Internal file for GetGitRevisionDescription.cmake | |
3 | # | |
4 | # Requires CMake 2.6 or newer (uses the 'function' command) | |
5 | # | |
6 | # Original Author: | |
7 | # 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net> | |
8 | # http://academic.cleardefinition.com | |
9 | # Iowa State University HCI Graduate Program/VRAC | |
10 | # | |
11 | # Copyright Iowa State University 2009-2010. | |
12 | # Distributed under the Boost Software License, Version 1.0. | |
13 | # (See accompanying file LICENSE_1_0.txt or copy at | |
14 | # http://www.boost.org/LICENSE_1_0.txt) | |
15 | ||
16 | set(HEAD_HASH) | |
17 | ||
18 | file(READ "@HEAD_FILE@" HEAD_CONTENTS LIMIT 1024) | |
19 | ||
20 | string(STRIP "${HEAD_CONTENTS}" HEAD_CONTENTS) | |
21 | if(HEAD_CONTENTS MATCHES "ref") | |
22 | # named branch | |
23 | string(REPLACE "ref: " "" HEAD_REF "${HEAD_CONTENTS}") | |
24 | if(EXISTS "@GIT_DIR@/${HEAD_REF}") | |
25 | configure_file("@GIT_DIR@/${HEAD_REF}" "@GIT_DATA@/head-ref" COPYONLY) | |
26 | else() | |
27 | configure_file("@GIT_DIR@/packed-refs" "@GIT_DATA@/packed-refs" COPYONLY) | |
28 | file(READ "@GIT_DATA@/packed-refs" PACKED_REFS) | |
29 | if(${PACKED_REFS} MATCHES "([0-9a-z]*) ${HEAD_REF}") | |
30 | set(HEAD_HASH "${CMAKE_MATCH_1}") | |
31 | endif() | |
32 | endif() | |
33 | else() | |
34 | # detached HEAD | |
35 | configure_file("@GIT_DIR@/HEAD" "@GIT_DATA@/head-ref" COPYONLY) | |
36 | endif() | |
37 | ||
38 | if(NOT HEAD_HASH) | |
39 | file(READ "@GIT_DATA@/head-ref" HEAD_HASH LIMIT 1024) | |
40 | string(STRIP "${HEAD_HASH}" HEAD_HASH) | |
41 | endif() |