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7c673cae FG |
1 | # - Returns a version string from Git |
2 | # | |
3 | # These functions force a re-configure on each git commit so that you can | |
4 | # trust the values of the variables in your build system. | |
5 | # | |
6 | # get_git_head_revision(<refspecvar> <hashvar> [<additional arguments to git describe> ...]) | |
7 | # | |
8 | # Returns the refspec and sha hash of the current head revision | |
9 | # | |
10 | # git_describe(<var> [<additional arguments to git describe> ...]) | |
11 | # | |
12 | # Returns the results of git describe on the source tree, and adjusting | |
13 | # the output so that it tests false if an error occurs. | |
14 | # | |
15 | # git_get_exact_tag(<var> [<additional arguments to git describe> ...]) | |
16 | # | |
17 | # Returns the results of git describe --exact-match on the source tree, | |
18 | # and adjusting the output so that it tests false if there was no exact | |
19 | # matching tag. | |
20 | # | |
21 | # Requires CMake 2.6 or newer (uses the 'function' command) | |
22 | # | |
23 | # Original Author: | |
24 | # 2009-2010 Ryan Pavlik <rpavlik@iastate.edu> <abiryan@ryand.net> | |
25 | # http://academic.cleardefinition.com | |
26 | # Iowa State University HCI Graduate Program/VRAC | |
27 | # | |
28 | # Copyright Iowa State University 2009-2010. | |
29 | # Distributed under the Boost Software License, Version 1.0. | |
30 | # (See accompanying file LICENSE_1_0.txt or copy at | |
31 | # http://www.boost.org/LICENSE_1_0.txt) | |
32 | ||
33 | if(__get_git_revision_description) | |
34 | return() | |
35 | endif() | |
36 | set(__get_git_revision_description YES) | |
37 | ||
38 | # We must run the following at "include" time, not at function call time, | |
39 | # to find the path to this module rather than the path to a calling list file | |
40 | get_filename_component(_gitdescmoddir ${CMAKE_CURRENT_LIST_FILE} PATH) | |
41 | ||
42 | function(get_git_head_revision _refspecvar _hashvar) | |
43 | set(GIT_PARENT_DIR "${CMAKE_CURRENT_SOURCE_DIR}") | |
44 | set(GIT_DIR "${GIT_PARENT_DIR}/.git") | |
45 | while(NOT EXISTS "${GIT_DIR}") # .git dir not found, search parent directories | |
46 | set(GIT_PREVIOUS_PARENT "${GIT_PARENT_DIR}") | |
47 | get_filename_component(GIT_PARENT_DIR ${GIT_PARENT_DIR} PATH) | |
48 | if(GIT_PARENT_DIR STREQUAL GIT_PREVIOUS_PARENT) | |
49 | # We have reached the root directory, we are not in git | |
50 | set(${_refspecvar} "GITDIR-NOTFOUND" PARENT_SCOPE) | |
51 | set(${_hashvar} "GITDIR-NOTFOUND" PARENT_SCOPE) | |
52 | return() | |
53 | endif() | |
54 | set(GIT_DIR "${GIT_PARENT_DIR}/.git") | |
55 | endwhile() | |
9f95a23c | 56 | # check if this is a submodule or git-worktree |
7c673cae | 57 | if(NOT IS_DIRECTORY ${GIT_DIR}) |
9f95a23c TL |
58 | file(READ ${GIT_DIR} gitdirfile) |
59 | string(REGEX REPLACE "gitdir: (.*)\n$" "\\1" GIT_DIR_PATH ${gitdirfile}) | |
60 | if(IS_ABSOLUTE ${GIT_DIR_PATH}) | |
61 | get_filename_component(GIT_DIR ${GIT_DIR_PATH} ABSOLUTE) | |
62 | else() | |
63 | get_filename_component(LINKED_DIR ${GIT_DIR} PATH) | |
64 | get_filename_component(GIT_DIR ${LINKED_DIR}/${GIT_DIR_PATH} ABSOLUTE) | |
65 | endif() | |
7c673cae FG |
66 | endif() |
67 | set(GIT_DATA "${CMAKE_CURRENT_BINARY_DIR}/CMakeFiles/git-data") | |
68 | if(NOT EXISTS "${GIT_DATA}") | |
69 | file(MAKE_DIRECTORY "${GIT_DATA}") | |
70 | endif() | |
71 | ||
72 | if(NOT EXISTS "${GIT_DIR}/HEAD") | |
73 | return() | |
74 | endif() | |
75 | set(HEAD_FILE "${GIT_DATA}/HEAD") | |
76 | configure_file("${GIT_DIR}/HEAD" "${HEAD_FILE}" COPYONLY) | |
77 | ||
78 | configure_file("${_gitdescmoddir}/GetGitRevisionDescription.cmake.in" | |
79 | "${GIT_DATA}/grabRef.cmake" | |
80 | @ONLY) | |
81 | include("${GIT_DATA}/grabRef.cmake") | |
82 | ||
83 | set(${_refspecvar} "${HEAD_REF}" PARENT_SCOPE) | |
84 | set(${_hashvar} "${HEAD_HASH}" PARENT_SCOPE) | |
85 | endfunction() | |
86 | ||
87 | function(git_describe _var) | |
88 | if(NOT GIT_FOUND) | |
89 | find_package(Git QUIET) | |
90 | endif() | |
91 | get_git_head_revision(refspec hash) | |
92 | if(NOT GIT_FOUND) | |
93 | set(${_var} "GIT-NOTFOUND" PARENT_SCOPE) | |
94 | return() | |
95 | endif() | |
96 | if(NOT hash) | |
97 | set(${_var} "HEAD-HASH-NOTFOUND" PARENT_SCOPE) | |
98 | return() | |
99 | endif() | |
100 | ||
101 | # TODO sanitize | |
102 | #if((${ARGN}" MATCHES "&&") OR | |
103 | # (ARGN MATCHES "||") OR | |
104 | # (ARGN MATCHES "\\;")) | |
105 | # message("Please report the following error to the project!") | |
106 | # message(FATAL_ERROR "Looks like someone's doing something nefarious with git_describe! Passed arguments ${ARGN}") | |
107 | #endif() | |
108 | ||
109 | #message(STATUS "Arguments to execute_process: ${ARGN}") | |
110 | ||
111 | execute_process(COMMAND | |
112 | "${GIT_EXECUTABLE}" | |
113 | describe | |
114 | ${hash} | |
115 | ${ARGN} | |
116 | WORKING_DIRECTORY | |
117 | "${CMAKE_CURRENT_SOURCE_DIR}" | |
118 | RESULT_VARIABLE | |
119 | res | |
120 | OUTPUT_VARIABLE | |
121 | out | |
122 | ERROR_QUIET | |
123 | OUTPUT_STRIP_TRAILING_WHITESPACE) | |
124 | if(NOT res EQUAL 0) | |
125 | set(out "${out}-${res}-NOTFOUND") | |
126 | endif() | |
127 | ||
128 | set(${_var} "${out}" PARENT_SCOPE) | |
129 | endfunction() | |
130 | ||
131 | function(git_get_exact_tag _var) | |
132 | git_describe(out --exact-match ${ARGN}) | |
133 | set(${_var} "${out}" PARENT_SCOPE) | |
134 | endfunction() |