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CMake/Tests/CMakeTests/FileDownloadTest.cmake.in

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Improve FILE(DOWNLOAD) and ExternalProject. Improve FILE(DOWNLOAD ...): - Add percent complete progress output to the FILE DOWNLOAD command. This progress output is off by default to preserve existing behavior. To turn it on, pass SHOW_PROGRESS as an argument. - Add EXPECTED_MD5 argument. Verify that the downloaded file has the expected md5 sum after download is complete. - Add documentation for SHOW_PROGRESS and EXPECTED_MD5. When the destination file exists already and has the expected md5 sum, then do not bother re-downloading the file. ("Short circuit" return.) Also, add a test that checks for the status output indicating that the short circuit behavior is actually occurring. Use a binary file for the test so that the md5 sum is guaranteed to be the same on all platforms regardless of "shifting text file line ending" issues. Improve ExternalProject: - Add argument URL_MD5. - Add verify step that compares md5 sum of .tar.gz file before extracting it. - Add md5 check to download step, too, to prevent unnecessary downloads. - Emit a warning message when a file is not verified. Indicate that the file may be corrupt or that no checksum was specified.
2010-05-27 20:21:56 +04:00
set(url "file://@CMAKE_CURRENT_SOURCE_DIR@/FileDownloadInput.png")
set(dir "@CMAKE_CURRENT_BINARY_DIR@/downloads")
message(STATUS "FileDownload:1")
file(DOWNLOAD
${url}
${dir}/file1.png
TIMEOUT 2
)
message(STATUS "FileDownload:2")
file(DOWNLOAD
${url}
${dir}/file2.png
TIMEOUT 2
SHOW_PROGRESS
)
# Two calls in a row, exactly the same arguments.
# Since downloaded file should exist already for 2nd call,
# the 2nd call will short-circuit and return early...
#
if(EXISTS ${dir}/file3.png)
file(REMOVE ${dir}/file3.png)
endif()
message(STATUS "FileDownload:3")
file(DOWNLOAD
${url}
${dir}/file3.png
TIMEOUT 2
EXPECTED_MD5 d16778650db435bda3a8c3435c3ff5d1
)
message(STATUS "FileDownload:4")
file(DOWNLOAD
${url}
${dir}/file3.png
TIMEOUT 2
Make file DOWNLOAD less noisy (#11761) Thanks to Daniel Nelson for the suggestion and the patch.
2011-02-09 21:22:32 +03:00
STATUS status
Improve FILE(DOWNLOAD) and ExternalProject. Improve FILE(DOWNLOAD ...): - Add percent complete progress output to the FILE DOWNLOAD command. This progress output is off by default to preserve existing behavior. To turn it on, pass SHOW_PROGRESS as an argument. - Add EXPECTED_MD5 argument. Verify that the downloaded file has the expected md5 sum after download is complete. - Add documentation for SHOW_PROGRESS and EXPECTED_MD5. When the destination file exists already and has the expected md5 sum, then do not bother re-downloading the file. ("Short circuit" return.) Also, add a test that checks for the status output indicating that the short circuit behavior is actually occurring. Use a binary file for the test so that the md5 sum is guaranteed to be the same on all platforms regardless of "shifting text file line ending" issues. Improve ExternalProject: - Add argument URL_MD5. - Add verify step that compares md5 sum of .tar.gz file before extracting it. - Add md5 check to download step, too, to prevent unnecessary downloads. - Emit a warning message when a file is not verified. Indicate that the file may be corrupt or that no checksum was specified.
2010-05-27 20:21:56 +04:00
EXPECTED_MD5 d16778650db435bda3a8c3435c3ff5d1
)
Make file DOWNLOAD less noisy (#11761) Thanks to Daniel Nelson for the suggestion and the patch.
2011-02-09 21:22:32 +03:00
message(STATUS "${status}")