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51 lines
1.8 KiB
CMake
51 lines
1.8 KiB
CMake
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# Downloads and extracts the 7-Zip MSI installer from https://www.7-zip.org/.
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#
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# Returns the extracted 7-Zip directory in DOWNLOADED_7ZIP_DIR
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#
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# Downloads 7-Zip to extract LLVM if it isn't available in the PATH
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function(download_and_extract_7zip)
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set(7ZIP_VERSION 1801)
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set(7ZIP_EXT .msi)
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set(7ZIP_NAME 7z${7ZIP_VERSION}-x64)
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set(7ZIP_FULL_NAME ${7ZIP_NAME}${7ZIP_EXT})
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set(7ZIP_FILE ${CMAKE_BINARY_DIR}/${7ZIP_FULL_NAME})
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set(7ZIP_EXTRACT_DIR ${CMAKE_BINARY_DIR}/${7ZIP_NAME})
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set(7ZIP_URL https://www.7-zip.org/a/${7ZIP_FULL_NAME})
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# msiexec requires Windows path separators (\)
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file(TO_NATIVE_PATH ${7ZIP_FILE} 7ZIP_FILE)
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file(TO_NATIVE_PATH ${7ZIP_EXTRACT_DIR} 7ZIP_EXTRACT_DIR)
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if(NOT EXISTS ${7ZIP_FILE})
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message(STATUS "Downloading 7-Zip ${7ZIP_VERSION} (${7ZIP_URL}) ...")
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file(DOWNLOAD ${7ZIP_URL} ${7ZIP_FILE})
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endif()
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if(NOT EXISTS ${7ZIP_EXTRACT_DIR})
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find_program(MSIEXEC_EXECUTABLE msiexec)
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if(NOT MSIEXEC_EXECUTABLE)
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message(FATAL_ERROR "Unable to find msiexec (required to extract 7-Zip msi \
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installer). Install 7-Zip yourself and make sure it is available in the path")
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endif()
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message(STATUS "Extracting downloaded 7-Zip ...")
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# msiexec with /a option allows extraction of msi installers without requiring
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# admin privileges. We use this to extract the 7-Zip installer without
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# requiring any actions from the user
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execute_process(COMMAND ${MSIEXEC_EXECUTABLE} /a ${7ZIP_FILE} /qn
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TARGETDIR=${7ZIP_EXTRACT_DIR}
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OUTPUT_QUIET)
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endif()
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# Convert back to CMake separators (/) before returning
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file(TO_CMAKE_PATH ${7ZIP_EXTRACT_DIR} 7ZIP_EXTRACT_DIR)
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# Actual directory is nested inside the extract directory. We return the nested
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# directory instead of the extract directory
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set(DOWNLOADED_7ZIP_DIR ${7ZIP_EXTRACT_DIR}/Files/7-Zip PARENT_SCOPE)
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endfunction()
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