mirror of
https://github.com/Kitware/CMake.git
synced 2026-02-08 16:19:36 -06:00
f67139ae6f
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.
42 lines
829 B
CMake
42 lines
829 B
CMake
set(url "file://@CMAKE_CURRENT_SOURCE_DIR@/FileDownloadInput.png")
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set(dir "@CMAKE_CURRENT_BINARY_DIR@/downloads")
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message(STATUS "FileDownload:1")
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file(DOWNLOAD
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${url}
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${dir}/file1.png
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TIMEOUT 2
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)
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message(STATUS "FileDownload:2")
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file(DOWNLOAD
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${url}
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${dir}/file2.png
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TIMEOUT 2
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SHOW_PROGRESS
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)
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# Two calls in a row, exactly the same arguments.
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# Since downloaded file should exist already for 2nd call,
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# the 2nd call will short-circuit and return early...
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#
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if(EXISTS ${dir}/file3.png)
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file(REMOVE ${dir}/file3.png)
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endif()
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message(STATUS "FileDownload:3")
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file(DOWNLOAD
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${url}
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${dir}/file3.png
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TIMEOUT 2
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EXPECTED_MD5 d16778650db435bda3a8c3435c3ff5d1
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)
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message(STATUS "FileDownload:4")
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file(DOWNLOAD
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${url}
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${dir}/file3.png
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TIMEOUT 2
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EXPECTED_MD5 d16778650db435bda3a8c3435c3ff5d1
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)
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