vcpkg_from_github(
    OUT_SOURCE_PATH SOURCE_PATH
    REPO libgit2/libgit2
    REF v1.6.4
    SHA512 fd73df91710f19b0d6c3765c37c7f529233196da91cf4d58028a8d3840244f11df44abafabd74a8ed1cbe4826d1afd6ff9f01316d183ace0924c65e7cf0eb8d5
    HEAD_REF maint/v1.6
    PATCHES
        fix-configcmake.patch
)

file(REMOVE_RECURSE "${SOURCE_PATH}/cmake/FindPCRE.cmake")

string(COMPARE EQUAL "${VCPKG_CRT_LINKAGE}" "static" STATIC_CRT)

set(REGEX_BACKEND OFF)
set(USE_HTTPS OFF)

function(set_regex_backend VALUE)
    if(REGEX_BACKEND)
        message(FATAL_ERROR "Only one regex backend (pcre,pcre2) is allowed")
    endif()
    set(REGEX_BACKEND ${VALUE} PARENT_SCOPE)
endfunction()

function(set_tls_backend VALUE)
    if(USE_HTTPS)
        message(FATAL_ERROR "Only one TLS backend (openssl,winhttp,sectransp,mbedtls) is allowed")
    endif()
    set(USE_HTTPS ${VALUE} PARENT_SCOPE)
endfunction()

if("openssl" IN_LIST FEATURES)
    list(APPEND GIT_OPTIONS "-DGIT_OPENSSL=1")
endif()

foreach(GIT2_FEATURE ${FEATURES})
    if(GIT2_FEATURE STREQUAL "pcre")
        set_regex_backend("pcre")
    elseif(GIT2_FEATURE STREQUAL "pcre2")
        set_regex_backend("pcre2")
    elseif(GIT2_FEATURE STREQUAL "openssl")
        set_tls_backend("OpenSSL")
    elseif(GIT2_FEATURE STREQUAL "winhttp")
        set_tls_backend("WinHTTP")
    elseif(GIT2_FEATURE STREQUAL "sectransp")
        set_tls_backend("SecureTransport")
    elseif(GIT2_FEATURE STREQUAL "mbedtls")
        set_tls_backend("mbedTLS")
    endif()
endforeach()

if(NOT REGEX_BACKEND)
    message(FATAL_ERROR "Must choose pcre or pcre2 regex backend")
endif()

vcpkg_check_features(
    OUT_FEATURE_OPTIONS GIT2_FEATURES
    FEATURES
        ssh USE_SSH
)

vcpkg_cmake_configure(
    SOURCE_PATH "${SOURCE_PATH}"
    OPTIONS
        -DBUILD_TESTS=OFF
        -DUSE_HTTP_PARSER=system
        -DUSE_HTTPS=${USE_HTTPS}
        -DREGEX_BACKEND=${REGEX_BACKEND}
        -DSTATIC_CRT=${STATIC_CRT}
        -DBUILD_CLI=OFF
        ${GIT2_FEATURES}
        ${GIT_OPTIONS}
)

vcpkg_cmake_install()
vcpkg_cmake_config_fixup(PACKAGE_NAME unofficial-git2 CONFIG_PATH share/unofficial-git2)
vcpkg_fixup_pkgconfig()

file(REMOVE_RECURSE "${CURRENT_PACKAGES_DIR}/debug/include")

file(INSTALL "${SOURCE_PATH}/COPYING" DESTINATION "${CURRENT_PACKAGES_DIR}/share/${PORT}" RENAME copyright)