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ExternalProject: Reattempt download when verification fails. 

When downloading an URL with ExternalProject, reattempt the download three
times if the file hash verification fails.

The re-attempt is limited to non-local URL's.  The same download CMake script
is re-used after removing any file that resulted from the previous download
attempt.  Up to three re-attempts are performed.
This commit is contained in:
Matt McCormick 2014-01-15 16:31:23 -05:00
parent c4e5e17f38
commit b5e2265fc3
1 changed files with 27 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

34
Modules/ExternalProject.cmake
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@ -585,13 +585,30 @@ message(STATUS \"downloading... done\")
endfunction()
function(_ep_write_verifyfile_script script_filename local hash)
function(_ep_write_verifyfile_script script_filename local hash retries download_script)
if("${hash}" MATCHES "${_ep_hash_regex}")
set(algo "${CMAKE_MATCH_1}")
string(TOLOWER "${CMAKE_MATCH_2}" expect_value)
set(script_content "set(expect_value \"${expect_value}\")
file(${algo} \"\${file}\" actual_value)
if(\"\${actual_value}\" STREQUAL \"\${expect_value}\")
set(attempt 0)
set(succeeded 0)
while(\${attempt} LESS ${retries} OR \${attempt} EQUAL ${retries} AND NOT \${succeeded})
file(${algo} \"\${file}\" actual_value)
if(\"\${actual_value}\" STREQUAL \"\${expect_value}\")
set(succeeded 1)
elseif(\${attempt} LESS ${retries})
message(STATUS \"${algo} hash of \${file}
does not match expected value
expected: \${expect_value}
actual: \${actual_value}
Retrying download.
\")
file(REMOVE \"\${file}\")
execute_process(COMMAND ${CMAKE_COMMAND} -P \"${download_script}\")
endif()
endwhile()
if(\${succeeded})
message(STATUS \"verifying file... done\")
else()
message(FATAL_ERROR \"error: ${algo} hash of
@ -1394,6 +1411,8 @@ function(_ep_add_download_command name)
set(repository "external project URL")
set(module "${url}")
set(tag "${hash}")
set(retries 0)
set(download_script "")
configure_file(
"${CMAKE_ROOT}/Modules/RepositoryInfo.txt.in"
"${stamp_dir}/${name}-urlinfo.txt"
@ -1423,16 +1442,17 @@ function(_ep_add_download_command name)
get_property(timeout TARGET ${name} PROPERTY _EP_TIMEOUT)
get_property(tls_verify TARGET ${name} PROPERTY _EP_TLS_VERIFY)
get_property(tls_cainfo TARGET ${name} PROPERTY _EP_TLS_CAINFO)
_ep_write_downloadfile_script("${stamp_dir}/download-${name}.cmake"
"${url}" "${file}" "${timeout}" "${hash}" "${tls_verify}" "${tls_cainfo}")
set(cmd ${CMAKE_COMMAND} -P ${stamp_dir}/download-${name}.cmake
set(download_script "${stamp_dir}/download-${name}.cmake")
_ep_write_downloadfile_script("${download_script}" "${url}" "${file}" "${timeout}" "${hash}" "${tls_verify}" "${tls_cainfo}")
set(cmd ${CMAKE_COMMAND} -P "${download_script}"
COMMAND)
set(retries 3)
set(comment "Performing download step (download, verify and extract) for '${name}'")
else()
set(file "${url}")
set(comment "Performing download step (verify and extract) for '${name}'")
endif()
_ep_write_verifyfile_script("${stamp_dir}/verify-${name}.cmake" "${file}" "${hash}")
_ep_write_verifyfile_script("${stamp_dir}/verify-${name}.cmake" "${file}" "${hash}" "${retries}" "${download_script}")
list(APPEND cmd ${CMAKE_COMMAND} -P ${stamp_dir}/verify-${name}.cmake
COMMAND)
_ep_write_extractfile_script("${stamp_dir}/extract-${name}.cmake" "${name}" "${file}" "${source_dir}")