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117 lines
3.9 KiB
117 lines
3.9 KiB
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# Copyright (C) 2011-2016 Daniel Scharrer |
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# |
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# This software is provided 'as-is', without any express or implied |
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# warranty. In no event will the author(s) be held liable for any damages |
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# arising from the use of this software. |
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# |
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# Permission is granted to anyone to use this software for any purpose, |
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# including commercial applications, and to alter it and redistribute it |
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# freely, subject to the following restrictions: |
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# |
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# 1. The origin of this software must not be misrepresented; you must not |
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# claim that you wrote the original software. If you use this software |
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# in a product, an acknowledgment in the product documentation would be |
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# appreciated but is not required. |
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# 2. Altered source versions must be plainly marked as such, and must not be |
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# misrepresented as being the original software. |
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# 3. This notice may not be removed or altered from any source distribution. |
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get_filename_component(VERSION_STRING_DIR "${CMAKE_CURRENT_LIST_FILE}" PATH) |
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set(VERSION_STRING_SCRIPT "${VERSION_STRING_DIR}/VersionScript.cmake") |
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# Create a rule to generate a version string at compile time. |
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# |
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# An optional fifth argument can be used to add additional cmake defines. |
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# |
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# SRC is processed using the configure_file() cmake command |
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# at build to produce DST with the following variable available: |
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# |
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# VERSION_SOURCES: |
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# List of (${var} ${file}) pairs. |
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# |
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# for each variable ${var} |
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# - ${var}: The contents of the associated file |
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# - ${var}_COUNT: Number of lines in the associated file |
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# - ${var}_${i}: The ${i}-th line of the associated file |
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# - ${var}_${i}_SHORTNAME: The first component of the ${i}-th line of the associated file |
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# - ${var}_${i}_STRING: Everything except the first component of the ${i}-th line of the associated file |
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# - ${var}_${i}_NAME: Everything except the last component of the ${i}-th line of the associated file |
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# - ${var}_${i}_NUMBER: The last component of the ${i}-th line of the associated file |
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# - ${var}_HEAD: The first paragraph of the associated file |
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# - ${var}_TAIL: The remaining paragraphs of the associated file |
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# |
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# - GIT_COMMIT: The current git commit. (not defined if there is no GIT_DIR directory) |
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# - GIT_COMMIT_PREFIX_${i}: The first ${i} characters of GIT_COMMIT (i=0..39) |
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# For the exact syntax of SRC see the documentation of the configure_file() cmake command. |
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# The version file is regenerated whenever VERSION_FILE or the current commit changes. |
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function(version_file SRC DST VERSION_SOURCES GIT_DIR) |
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set(MODE_VARIABLE 0) |
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set(MODE_FILE 1) |
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set(mode ${MODE_VARIABLE}) |
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set(args) |
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set(dependencies "${VERSION_STRING_SCRIPT}") |
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foreach(arg IN LISTS VERSION_SOURCES) |
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if(mode EQUAL MODE_VARIABLE) |
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set(mode ${MODE_FILE}) |
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else() |
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get_filename_component(arg "${arg}" ABSOLUTE) |
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list(APPEND dependencies ${arg}) |
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set(mode ${MODE_VARIABLE}) |
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endif() |
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list(APPEND args ${arg}) |
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endforeach() |
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get_filename_component(abs_src "${SRC}" ABSOLUTE) |
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get_filename_component(abs_dst "${DST}" ABSOLUTE) |
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get_filename_component(abs_git_dir "${GIT_DIR}" ABSOLUTE) |
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set(defines) |
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if(ARGC GREATER 4) |
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set(defines ${ARGV4}) |
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endif() |
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if(EXISTS "${abs_git_dir}") |
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find_program(GIT_COMMAND git) |
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if(GIT_COMMAND) |
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list(APPEND dependencies "${GIT_COMMAND}") |
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endif() |
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if(EXISTS "${abs_git_dir}/HEAD") |
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list(APPEND dependencies "${abs_git_dir}/HEAD") |
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endif() |
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if(EXISTS "${abs_git_dir}/packed-refs") |
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list(APPEND dependencies "${abs_git_dir}/packed-refs") |
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endif() |
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if(EXISTS "${abs_git_dir}/logs/HEAD") |
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list(APPEND dependencies "${abs_git_dir}/logs/HEAD") |
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endif() |
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endif() |
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add_custom_command( |
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OUTPUT |
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"${abs_dst}" |
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COMMAND |
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${CMAKE_COMMAND} |
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"-DINPUT=${abs_src}" |
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"-DOUTPUT=${abs_dst}" |
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"-DVERSION_SOURCES=${args}" |
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"-DGIT_DIR=${abs_git_dir}" |
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"-DGIT_COMMAND=${GIT_COMMAND}" |
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${defines} |
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-P "${VERSION_STRING_SCRIPT}" |
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MAIN_DEPENDENCY |
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"${abs_src}" |
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DEPENDS |
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${dependencies} |
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COMMENT "" |
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VERBATIM |
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) |
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endfunction(version_file)
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