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60 lines
1.9 KiB
CMake
60 lines
1.9 KiB
CMake
# Figure out if we can track VC revisions.
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function(find_first_existing_file out_var)
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foreach(file ${ARGN})
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if(EXISTS "${file}")
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set(${out_var} "${file}" PARENT_SCOPE)
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return()
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endif()
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endforeach()
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endfunction()
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macro(find_first_existing_vc_file out_var path)
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find_program(git_executable NAMES git git.exe git.cmd)
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# Run from a subdirectory to force git to print an absolute path.
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execute_process(COMMAND ${git_executable} rev-parse --git-dir
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WORKING_DIRECTORY ${path}/cmake
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RESULT_VARIABLE git_result
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OUTPUT_VARIABLE git_dir
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ERROR_QUIET)
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if(git_result EQUAL 0)
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string(STRIP "${git_dir}" git_dir)
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set(${out_var} "${git_dir}/logs/HEAD")
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# some branchless cases (e.g. 'repo') may not yet have .git/logs/HEAD
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if (NOT EXISTS "${git_dir}/logs/HEAD")
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file(WRITE "${git_dir}/logs/HEAD" "")
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endif()
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else()
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find_first_existing_file(${out_var}
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"${path}/.svn/wc.db" # SVN 1.7
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"${path}/.svn/entries" # SVN 1.6
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)
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endif()
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endmacro()
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find_first_existing_vc_file(llvm_vc "${LLVM_MAIN_SRC_DIR}")
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# The VC revision include that we want to generate.
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set(version_inc "${CMAKE_CURRENT_BINARY_DIR}/VCSRevision.h")
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set(get_svn_script "${LLVM_CMAKE_PATH}/GenerateVersionFromCVS.cmake")
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if(DEFINED llvm_vc)
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# Create custom target to generate the VC revision include.
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add_custom_command(OUTPUT "${version_inc}"
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DEPENDS "${llvm_vc}" "${get_svn_script}"
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COMMAND
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${CMAKE_COMMAND} "-DSOURCE_DIR=${LLVM_MAIN_SRC_DIR}"
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"-DNAME=LLVM_REVISION"
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"-DHEADER_FILE=${version_inc}"
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-P "${get_svn_script}")
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# Mark the generated header as being generated.
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set_source_files_properties("${version_inc}"
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PROPERTIES GENERATED TRUE
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HEADER_FILE_ONLY TRUE)
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else()
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file(WRITE "${version_inc}" "")
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endif()
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add_custom_target(llvm_vcsrevision_h DEPENDS "${version_inc}")
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