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annotate cmake/MolkoBuildAssets.cmake @ 277:1d10983fc0d7

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cmake: cleanup
author David Demelier <markand@malikania.fr>
date Sun, 13 Dec 2020 11:25:11 +0100
parents 97f55f6b9593
children
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1 #
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2 # MolkoBuildAssets.cmake -- CMake build system for molko
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3 #
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4 # Copyright (c) 2020 David Demelier <markand@malikania.fr>
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5 #
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6 # Permission to use, copy, modify, and/or distribute this software for any
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7 # purpose with or without fee is hereby granted, provided that the above
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8 # copyright notice and this permission notice appear in all copies.
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9 #
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10 # THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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11 # WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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12 # MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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13 # ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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14 # WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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15 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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16 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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17 #
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18
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19 #
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20 # # molko_build_assets
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21 #
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22 # Generate custom commands to convert assets into C header files using mlk-bcc.
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23 # The argument output will be set to contain every generated output so that the
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24 # caller can set them as source input and be generated before the target itself.
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25 #
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26 # ## Synopsis:
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27 #
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28 # ```cmake
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29 # molko_build_assets(assets outputs)
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30 # ```
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31 #
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32 # ## Example
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33 #
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34 # ```cmake
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35 # molko_build_assets(image.png outputs)
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36 # add_executable(main main.c ${outputs})
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37 # ```
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38 #
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39 # Do not forget to add the CMake current binary directory
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40 # `${CMAKE_CURRENT_BINARY_DIR}` through the include flags of the given target.
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41 #
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42 # Each file is generated using the exact same file hierarchy as the input so
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43 # an input of foo/bar/baz.png will be generated as foo/bar/baz.h in the binary
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44 # directory. The exported symbol use the pattern <last-directory>_<basename> so
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45 # in the above example, the file variable would be "bar_baz"
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46 #
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47
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48 macro(molko_build_assets assets outputs)
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49 set(${outputs})
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50
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51 foreach (a ${assets})
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52 file(RELATIVE_PATH basename ${CMAKE_CURRENT_SOURCE_DIR} ${a})
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53 string(REGEX REPLACE "\\..*$" ".h" output ${basename})
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54 set(output ${CMAKE_CURRENT_BINARY_DIR}/${output})
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55 get_filename_component(outputdir ${output} DIRECTORY)
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56 get_filename_component(name ${basename} NAME_WE)
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57 get_filename_component(category ${outputdir} NAME)
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58 get_filename_Component(extension ${a} EXT)
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59 file(MAKE_DIRECTORY ${outputdir})
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61 # For "text" files, we create a C array null-terminated.
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62 if (${extension} MATCHES "\\.(txt|sql)")
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63 set(arg0 -0)
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64 else ()
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65 unset(arg0)
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66 endif ()
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68 add_custom_command(
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69 OUTPUT ${output}
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70 COMMAND $<TARGET_FILE:mlk-bcc> ${arg0} -csu ${a} ${category}-${name} > ${output}
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71 DEPENDS
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72 ${a}
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73 $<TARGET_FILE:mlk-bcc>
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74 COMMENT "Generate header file from ${basename}"
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75 )
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77 list(APPEND ${outputs} ${output})
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78 endforeach ()
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79 endmacro()