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https://github.com/lopsided98/nix-ros-overlay.git
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33 lines
1.5 KiB
CMake
33 lines
1.5 KiB
CMake
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# CMake package that defines alternative version of ament_vendor macro
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# to extract information about vendored source to
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# vendored-source.json. Normally, the ament_vendor macro is defined in
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# the ament_cmake_vendor_package and it downloads the vendored source
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# code at compile time. This is not possible with Nix, because Nix
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# builds packages without network access. Therefore, we inject this
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# alternative macro to cmake at update time and it extracts the
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# information needed by Nix to download the source code. The main
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# entry point to all this functionality is in the patchAmentVendorGit
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# function.
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if(NOT ament_cmake_vendor_package_FIND_QUIETLY)
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message(STATUS "Found ament_cmake_vendor_package: Dummy version for Nix patching (${ament_cmake_vendor_package_DIR})")
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endif()
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find_program(JQ jq)
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find_program(NIX_PREFETCH_GIT nix-prefetch-git)
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macro(ament_vendor TARGET_NAME)
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cmake_parse_arguments(_ARG "GLOBAL_HOOK;SKIP_INSTALL" "SOURCE_SUBDIR;VCS_TYPE;VCS_URL;VCS_VERSION;SATISFIED" "CMAKE_ARGS;PATCHES" ${ARGN})
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if(_ARG_UNPARSED_ARGUMENTS)
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message(FATAL_ERROR "ament_vendor() called with unused arguments: "
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"${_ARG_UNPARSED_ARGUMENTS}")
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endif()
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execute_process(
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COMMAND ${NIX_PREFETCH_GIT} --url ${_ARG_VCS_URL} --rev ${_ARG_VCS_VERSION}
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COMMAND ${JQ} "{url: \"${_ARG_VCS_URL}\", rev: \"${_ARG_VCS_VERSION}\", hash: .hash}"
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OUTPUT_FILE ${CMAKE_BINARY_DIR}/vendored-source.json
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COMMAND_ECHO STDOUT
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COMMAND_ERROR_IS_FATAL ANY)
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endmacro()
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