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## # vcpkg_from_sourceforge
##
## Download and extract a project from sourceforge.
##
## ## Usage:
## ```cmake
## vcpkg_from_sourceforge(
##     OUT_SOURCE_PATH SOURCE_PATH
##     REPO <cunit/CUnit>
##     [REF <2.1-3>]
##     SHA512 <547b417109332...>
##     FILENAME <CUnit-2.1-3.tar.bz2>
##     [DISABLE_SSL]
##     [NO_REMOVE_ONE_LEVEL]
##     [PATCHES <patch1.patch> <patch2.patch>...]
## )
## ```
##
## ## Parameters:
## ### OUT_SOURCE_PATH
## Specifies the out-variable that will contain the extracted location.
##
## This should be set to `SOURCE_PATH` by convention.
##
## ### REPO
## The organization or user and repository (optional) on sourceforge.
##
## ### REF
## A stable version number that will not change contents.
##
## ### FILENAME
## The local name for the file. Files are shared between ports, so the file may need to be renamed to make it clearly attributed to this port and avoid conflicts.
##
## For example, we can get the download link:
## https://sourceforge.net/settings/mirror_choices?projectname=mad&filename=libmad/0.15.1b/libmad-0.15.1b.tar.gz&selected=nchc
## So the REPO is `mad/libmad`, the REF is `0.15.1b`, and the FILENAME is `libmad-0.15.1b.tar.gz`
##
## For some special links:
## https://sourceforge.net/settings/mirror_choices?projectname=soxr&filename=soxr-0.1.3-Source.tar.xz&selected=nchc
## The REPO is `soxr`, REF is not exist, and the FILENAME is `soxr-0.1.3-Source.tar.xz`
##
## ### SHA512
## The SHA512 hash that should match the archive.
##
## ### WORKING_DIRECTORY
## If specified, the archive will be extracted into the working directory instead of `${CURRENT_BUILDTREES_DIR}/src/`.
##
## Note that the archive will still be extracted into a subfolder underneath that directory (`${WORKING_DIRECTORY}/${REF}-${HASH}/`).
##
## ### PATCHES
## A list of patches to be applied to the extracted sources.
##
## Relative paths are based on the port directory.
##
## ### DISABLE_SSL
## Disable ssl when downloading source.
##
## ### NO_REMOVE_ONE_LEVEL
## Specifies that the default removal of the top level folder should not occur.
##
## ## Examples:
##
## * [cunit](https://github.com/Microsoft/vcpkg/blob/master/ports/cunit/portfile.cmake)
## * [polyclipping](https://github.com/Microsoft/vcpkg/blob/master/ports/polyclipping/portfile.cmake)
## * [tinyfiledialogs](https://github.com/Microsoft/vcpkg/blob/master/ports/tinyfiledialogs/portfile.cmake)

function(vcpkg_from_sourceforge)
    set(booleanValueArgs DISABLE_SSL NO_REMOVE_ONE_LEVEL)
    set(oneValueArgs OUT_SOURCE_PATH REPO REF SHA512 FILENAME WORKING_DIRECTORY)
    set(multipleValuesArgs PATCHES)
    cmake_parse_arguments(_vdus "${booleanValueArgs}" "${oneValueArgs}" "${multipleValuesArgs}" ${ARGN})

    if(NOT DEFINED _vdus_OUT_SOURCE_PATH)
        message(FATAL_ERROR "OUT_SOURCE_PATH must be specified.")
    endif()

    if(NOT DEFINED _vdus_SHA512)
        message(FATAL_ERROR "SHA512 must be specified.")
    endif()

    if(NOT DEFINED _vdus_REPO)
        message(FATAL_ERROR "The sourceforge repository must be specified.")
    endif()

    if(DEFINED _vdus_WORKING_DIRECTORY)
        set(WORKING_DIRECTORY WORKING_DIRECTORY "${_vdus_WORKING_DIRECTORY}")
    else()
        set(WORKING_DIRECTORY)
    endif()

    if (_vdus_DISABLE_SSL)
        set(URL_PROTOCOL http:)
    else()
        set(URL_PROTOCOL https:)
    endif()
    
    set(SOURCEFORGE_HOST ${URL_PROTOCOL}//sourceforge.net/projects)

    string(FIND ${_vdus_REPO} "/" FOUND_ORG)
    if (NOT FOUND_ORG EQUAL -1)
        string(SUBSTRING "${_vdus_REPO}" 0 ${FOUND_ORG} ORG_NAME)
        math(EXPR FOUND_ORG "${FOUND_ORG} + 1") # skip the slash
        string(SUBSTRING "${_vdus_REPO}" ${FOUND_ORG} -1 REPO_NAME)
        if (REPO_NAME MATCHES "/")
            message(FATAL_ERROR "REPO should contain at most one slash (found ${_vdus_REPO}).")
        endif()
        set(ORG_NAME ${ORG_NAME}/)
    else()
        set(ORG_NAME ${_vdus_REPO}/)
        set(REPO_NAME )
    endif()
    
    if (DEFINED _vdus_REF)
        set(URL "${SOURCEFORGE_HOST}/${ORG_NAME}files/${REPO_NAME}/${_vdus_REF}/${_vdus_FILENAME}")
    else()
        set(URL "${SOURCEFORGE_HOST}/${ORG_NAME}${REPO_NAME}/files/${_vdus_FILENAME}")
    endif()
        
    set(NO_REMOVE_ONE_LEVEL )
    if (_vdus_NO_REMOVE_ONE_LEVEL)
        set(NO_REMOVE_ONE_LEVEL "NO_REMOVE_ONE_LEVEL")
    endif()

    string(SUBSTRING "${_vdus_SHA512}" 0 10 SANITIZED_REF)

    list(APPEND SOURCEFORGE_MIRRORS
        cfhcable        # United States
        pilotfiber      # New York, NY
        gigenet         # Chicago, IL
        versaweb        # Las Vegas, NV
        ayera           # Modesto, CA
        netactuate      # Durham, NC
        phoenixnap      # Tempe, AZ
        astuteinternet  # Vancouver, BC
        freefr          # Paris, France
        netcologne      # Cologne, Germany
        deac-riga       # Latvia
        excellmedia     # Hyderabad, India
        iweb            # Montreal, QC
        jaist           # Nomi, Japan
        jztkft          # Mezotur, Hungary
        managedway      # Detroit, MI
        nchc            # Taipei, Taiwan
        netix           # Bulgaria
        ufpr            # Curitiba, Brazil
        tenet           # Wynberg, South Africa
    )
    
    # Try to use auto-select first
    set(DOWNLOAD_URL ${URL}/download)
    message(STATUS "Trying auto-select mirror...")
    vcpkg_download_distfile(ARCHIVE
        URLS "${DOWNLOAD_URL}"
        SHA512 "${_vdus_SHA512}"
        FILENAME "${_vdus_FILENAME}"
        SILENT_EXIT
    )
    
    if (EXISTS ${ARCHIVE})
        set(download_success 1)
    endif()
    
    if (NOT download_success EQUAL 1)
        foreach(SOURCEFORGE_MIRROR ${SOURCEFORGE_MIRRORS})
            set(DOWNLOAD_URL ${URL}/download?use_mirror=${SOURCEFORGE_MIRROR})
            message(STATUS "Trying mirror ${SOURCEFORGE_MIRROR}...")
            vcpkg_download_distfile(ARCHIVE
                URLS "${DOWNLOAD_URL}"
                SHA512 "${_vdus_SHA512}"
                FILENAME "${_vdus_FILENAME}"
                SILENT_EXIT
            )
            
            if (EXISTS ${ARCHIVE})
                set(download_success 1)
                break()
            endif()
        endforeach()
    endif()

    if (NOT download_success)
        message(FATAL_ERROR [[
            Couldn't download source from any of the sourceforge mirrors, please check your network.
            If you use a proxy, please set the HTTPS_PROXY and HTTP_PROXY environment
            variables to "http[s]://user:password@your-proxy-ip-address:port/".
            Otherwise, please submit an issue at https://github.com/Microsoft/vcpkg/issues
        ]])
    endif()
    
    vcpkg_extract_source_archive_ex(
        OUT_SOURCE_PATH SOURCE_PATH
        ARCHIVE "${ARCHIVE}"
        REF "${SANITIZED_REF}"
        ${NO_REMOVE_ONE_LEVEL}
        ${WORKING_DIRECTORY}
        PATCHES ${_vdus_PATCHES}
    )

    set(${_vdus_OUT_SOURCE_PATH} "${SOURCE_PATH}" PARENT_SCOPE)
endfunction()