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if(NOT DEFINED PREFIX)
message(FATAL_ERROR "PREFIX must be defined.")
endif()
if(NOT DEFINED URL)
message(FATAL_ERROR "URL must be defined.")
endif()
if(NOT DEFINED DOWNLOAD_DIR)
message(FATAL_ERROR "DOWNLOAD_DIR must be defined.")
endif()
if(NOT DEFINED EXPECTED_SHA256)
message(FATAL_ERROR "EXPECTED_SHA256 must be defined.")
endif()
if(NOT DEFINED TARGET)
message(FATAL_ERROR "TARGET must be defined.")
endif()
set(SRC_DIR ${PREFIX}/src/${TARGET})
# Check whether the source has been downloaded. If true, skip it.
# Useful for external downloads like homebrew.
if(USE_EXISTING_SRC_DIR)
if(EXISTS "${SRC_DIR}" AND IS_DIRECTORY "${SRC_DIR}")
file(GLOB EXISTED_FILES "${SRC_DIR}/*")
if(EXISTED_FILES)
message(STATUS "${SRC_DIR} is found and not empty, skipping download and extraction. ")
return()
endif()
endif()
message(FATAL_ERROR "USE_EXISTING_SRC_DIR set to ON, but '${SRC_DIR}' does not exist or is empty.")
endif()
# Taken from ExternalProject_Add. Let's hope we can drop this one day when
# ExternalProject_Add allows you to disable SHOW_PROGRESS on the file download.
if(TIMEOUT)
set(timeout_args TIMEOUT ${timeout})
set(timeout_msg "${timeout} seconds")
else()
set(timeout_args "# no TIMEOUT")
set(timeout_msg "none")
endif()
string(REGEX MATCH "[^/\\?]*$" fname "${URL}")
if(NOT "${fname}" MATCHES "(\\.|=)(bz2|tar|tgz|tar\\.gz|zip)$")
string(REGEX MATCH "([^/\\?]+(\\.|=)(bz2|tar|tgz|tar\\.gz|zip))/.*$" match_result "${URL}")
set(fname "${CMAKE_MATCH_1}")
endif()
if(NOT "${fname}" MATCHES "(\\.|=)(bz2|tar|tgz|tar\\.gz|zip)$")
message(FATAL_ERROR "Could not extract tarball filename from url:\n ${url}")
endif()
string(REPLACE ";" "-" fname "${fname}")
set(file ${DOWNLOAD_DIR}/${fname})
message(STATUS "file: ${file}")
message(STATUS "downloading...
src='${URL}'
dst='${file}'
timeout='${timeout_msg}'")
file(DOWNLOAD ${URL} ${file}
${timeout_args}
${hash_args}
STATUS status
LOG log)
list(GET status 0 status_code)
list(GET status 1 status_string)
if(NOT status_code EQUAL 0)
message(FATAL_ERROR "error: downloading '${URL}' failed
status_code: ${status_code}
status_string: ${status_string}
log: ${log}
")
endif()
set(NULL_SHA256 "0000000000000000000000000000000000000000000000000000000000000000")
# Allow users to use "SKIP" or "skip" as the sha256 to skip checking the hash.
# You can still use the all zeros hash too.
if((EXPECTED_SHA256 STREQUAL "SKIP") OR (EXPECTED_SHA256 STREQUAL "skip"))
set(EXPECTED_SHA256 ${NULL_SHA256})
endif()
# We could avoid computing the SHA256 entirely if a NULL_SHA256 was given,
# but we want to warn users of an empty file.
file(SHA256 ${file} ACTUAL_SHA256)
if(ACTUAL_SHA256 STREQUAL "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855")
# File was empty. It's likely due to lack of SSL support.
message(FATAL_ERROR
"Failed to download ${URL}. The file is empty and likely means CMake "
"was built without SSL support. Please use a version of CMake with "
"proper SSL support. See "
"https://github.com/neovim/neovim/wiki/Building-Neovim#build-prerequisites "
"for more information.")
elseif((NOT EXPECTED_SHA256 STREQUAL NULL_SHA256) AND
(NOT EXPECTED_SHA256 STREQUAL ACTUAL_SHA256))
# Wasn't a NULL SHA256 and we didn't match, so we fail.
message(FATAL_ERROR
"Failed to download ${URL}. Expected a SHA256 of "
"${EXPECTED_SHA256} but got ${ACTUAL_SHA256} instead.")
endif()
message(STATUS "downloading... done")
# Slurped from a generated extract-TARGET.cmake file.
message(STATUS "extracting...
src='${file}'
dst='${SRC_DIR}'")
if(NOT EXISTS "${file}")
message(FATAL_ERROR "error: file to extract does not exist: '${file}'")
endif()
# Prepare a space for extracting:
#
set(i 1234)
while(EXISTS "${SRC_DIR}/../ex-${TARGET}${i}")
math(EXPR i "${i} + 1")
endwhile()
set(ut_dir "${SRC_DIR}/../ex-${TARGET}${i}")
file(MAKE_DIRECTORY "${ut_dir}")
# Extract it:
#
message(STATUS "extracting... [tar xfz]")
execute_process(COMMAND ${CMAKE_COMMAND} -E tar xfz ${file}
WORKING_DIRECTORY ${ut_dir}
RESULT_VARIABLE rv)
if(NOT rv EQUAL 0)
message(STATUS "extracting... [error clean up]")
file(REMOVE_RECURSE "${ut_dir}")
message(FATAL_ERROR "error: extract of '${file}' failed")
endif()
# Analyze what came out of the tar file:
#
message(STATUS "extracting... [analysis]")
file(GLOB contents "${ut_dir}/*")
list(LENGTH contents n)
if(NOT n EQUAL 1 OR NOT IS_DIRECTORY "${contents}")
set(contents "${ut_dir}")
endif()
# Move "the one" directory to the final directory:
#
message(STATUS "extracting... [rename]")
file(REMOVE_RECURSE ${SRC_DIR})
get_filename_component(contents ${contents} ABSOLUTE)
file(RENAME ${contents} ${SRC_DIR})
# Clean up:
#
message(STATUS "extracting... [clean up]")
file(REMOVE_RECURSE "${ut_dir}")
message(STATUS "extracting... done")
|
