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# Usage:
# vcpkg_from_github(
# OUT_SOURCE_PATH <OutVar for SOURCE_PATH (SOURCE_PATH)>
# REPO <Repository (Microsoft/cpprestsdk)>
# REF <stable ref (v2.0.0)>
# SHA512 <SHA for REF (45d0d7f8cc350...)>
# HEAD_REF <unstable branch (master)>
# )
#
# Notes:
# This will export VCPKG_HEAD_VERSION variable during head builds.
function(vcpkg_from_github)
set(oneValueArgs OUT_SOURCE_PATH REPO REF SHA512 HEAD_REF)
set(multipleValuesArgs)
cmake_parse_arguments(_vdud "" "${oneValueArgs}" "${multipleValuesArgs}" ${ARGN})
if(NOT _vdud_OUT_SOURCE_PATH)
message(FATAL_ERROR "OUT_SOURCE_PATH must be specified.")
endif()
if((_vdud_REF AND NOT _vdud_SHA512) OR (NOT _vdud_REF AND _vdud_SHA512))
message(FATAL_ERROR "SHA512 must be specified if REF is specified.")
endif()
if(NOT _vdud_REPO)
message(FATAL_ERROR "The GitHub repository must be specified.")
endif()
if(NOT _vdud_REF AND NOT _vdud_HEAD_REF)
message(FATAL_ERROR "At least one of REF and HEAD_REF must be specified.")
endif()
string(REGEX REPLACE ".*/" "" REPO_NAME ${_vdud_REPO})
string(REGEX REPLACE "/.*" "" ORG_NAME ${_vdud_REPO})
macro(set_SOURCE_PATH BASE BASEREF)
set(SOURCE_PATH "${BASE}/${REPO_NAME}-${BASEREF}")
if(EXISTS ${SOURCE_PATH})
set(${_vdud_OUT_SOURCE_PATH} "${SOURCE_PATH}" PARENT_SCOPE)
else()
# Sometimes GitHub strips a leading 'v' off the REF.
string(REGEX REPLACE "^v" "" REF ${BASEREF})
set(SOURCE_PATH "${BASE}/${REPO_NAME}-${REF}")
if(EXISTS ${SOURCE_PATH})
set(${_vdud_OUT_SOURCE_PATH} "${SOURCE_PATH}" PARENT_SCOPE)
else()
message(FATAL_ERROR "Could not determine source path: '${BASE}/${REPO_NAME}-${BASEREF}' does not exist")
endif()
endif()
endmacro()
if(VCPKG_USE_HEAD_VERSION AND NOT _vdud_HEAD_REF)
message(STATUS "Package does not specify HEAD_REF. Falling back to non-HEAD version.")
set(VCPKG_USE_HEAD_VERSION OFF)
endif()
# Handle --no-head scenarios
if(NOT VCPKG_USE_HEAD_VERSION)
if(NOT _vdud_REF)
message(FATAL_ERROR "Package does not specify REF. It must built using --head.")
endif()
vcpkg_download_distfile(ARCHIVE
URLS "https://github.com/${ORG_NAME}/${REPO_NAME}/archive/${_vdud_REF}.tar.gz"
SHA512 "${_vdud_SHA512}"
FILENAME "${ORG_NAME}-${REPO_NAME}-${_vdud_REF}.tar.gz"
)
vcpkg_extract_source_archive_ex(ARCHIVE "${ARCHIVE}")
set_SOURCE_PATH(${CURRENT_BUILDTREES_DIR}/src ${_vdud_REF})
return()
endif()
# The following is for --head scenarios
set(URL "https://github.com/${ORG_NAME}/${REPO_NAME}/archive/${_vdud_HEAD_REF}.tar.gz")
set(downloaded_file_path "${DOWNLOADS}/${ORG_NAME}-${REPO_NAME}-${_vdud_HEAD_REF}.tar.gz")
if(_VCPKG_NO_DOWNLOADS)
if(NOT EXISTS ${downloaded_file_path} OR NOT EXISTS ${downloaded_file_path}.version)
message(FATAL_ERROR "Downloads are disabled, but '${downloaded_file_path}' does not exist.")
endif()
message(STATUS "Using cached ${downloaded_file_path}")
else()
if(EXISTS ${downloaded_file_path})
message(STATUS "Purging cached ${downloaded_file_path} to fetch latest (use --no-downloads to suppress)")
file(REMOVE ${downloaded_file_path})
endif()
if(EXISTS ${downloaded_file_path}.version)
file(REMOVE ${downloaded_file_path}.version)
endif()
if(EXISTS ${CURRENT_BUILDTREES_DIR}/src/head)
file(REMOVE_RECURSE ${CURRENT_BUILDTREES_DIR}/src/head)
endif()
# Try to download the file and version information from github.
message(STATUS "Downloading ${URL}...")
file(DOWNLOAD "https://api.github.com/repos/${ORG_NAME}/${REPO_NAME}/git/refs/heads/${_vdud_HEAD_REF}"
${downloaded_file_path}.version
STATUS download_status
)
list(GET download_status 0 status_code)
if (NOT "${status_code}" STREQUAL "0")
file(REMOVE ${downloaded_file_path}.version)
message(FATAL_ERROR "Downloading version info for ${URL}... Failed. Status: ${download_status}")
endif()
file(DOWNLOAD ${URL} ${downloaded_file_path} STATUS download_status)
list(GET download_status 0 status_code)
if (NOT "${status_code}" STREQUAL "0")
file(REMOVE ${downloaded_file_path})
message(FATAL_ERROR "Downloading ${URL}... Failed. Status: ${download_status}")
else()
message(STATUS "Downloading ${URL}... OK")
endif()
endif()
vcpkg_extract_source_archive_ex(
ARCHIVE "${downloaded_file_path}"
WORKING_DIRECTORY "${CURRENT_BUILDTREES_DIR}/src/head"
)
# Parse the github refs response with regex.
# TODO: use some JSON swiss-army-knife utility instead.
file(READ "${downloaded_file_path}.version" _contents)
string(REGEX MATCH "\"sha\": \"[a-f0-9]+\"" x "${_contents}")
string(REGEX REPLACE "\"sha\": \"([a-f0-9]+)\"" "\\1" _version ${x})
# exports VCPKG_HEAD_VERSION to the caller. This will get picked up by ports.cmake after the build.
set(VCPKG_HEAD_VERSION ${_version} PARENT_SCOPE)
set_SOURCE_PATH(${CURRENT_BUILDTREES_DIR}/src/head ${_vdud_HEAD_REF})
endfunction()
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