function(openrw_src_dir RESULT)
    # Returns the OpenRW source directory
    get_filename_component(SRC "${CTEST_SCRIPT_DIRECTORY}/../.." ABSOLUTE)
    set("${RESULT}" "${SRC}" PARENT_SCOPE)
endfunction()

function(openrw_bin_dir_default RESULT)
    # Returns the default OpenRW binary output directory
    get_filename_component(BIN "${CTEST_SCRIPT_DIRECTORY}/../../build" ABSOLUTE)
    set("${RESULT}" "${BIN}" PARENT_SCOPE)
endfunction()

function(openrw_bin_dir RESULT SUBDIR)
    # Returns a subdirectory in the default OpenRW binary output directory
    get_filename_component(BIN "${CTEST_SCRIPT_DIRECTORY}/../../build" ABSOLUTE)
    set("${RESULT}" "${BIN}/${SUBDIR}" PARENT_SCOPE)
endfunction()

function(openrw_git_sha1 RESULT BINDIR)
    # Get the full SHA1 of the current checked out OpenRW
    include("${CTEST_SCRIPT_DIRECTORY}/../modules/GetGitRevisionDescription.cmake")
    # get_git_head_revision expects CMAKE_CURRENT_BINARY_DIR to exist.
    set(CMAKE_BINARY_DIR "${BINDIR}")
    set(CMAKE_CURRENT_BINARY_DIR "${BINDIR}")
    get_git_head_revision(GIT_REFSPEC GIT_SHA1)
    set("${RESULT}" "${GIT_SHA1}" PARENT_SCOPE)
endfunction()

function(openrw_git_sha1_short RESULT BINDIR)
    # Get a short SHA1 of the current checked out OpenRW
    openrw_git_sha1(GIT_SHA1 "${BINDIR}")
    string(SUBSTRING "${GIT_SHA1}" 0 8 SHORT_HASH)
    set("${RESULT}" "${SHORT_HASH}" PARENT_SCOPE)
endfunction()

function(openrw_build_name BUILDER_NAME_RES BUILD_NAME_RES)
    # Construct a name for the current builder and build.
    if(CTEST_BINARY_DIRECTORY STREQUAL "")
        message(FATAL_ERROR "calculate_names needs CTEST_BINARY_DIRECTORY set.")
    endif()
    if(MODEL_NAME STREQUAL "")
        message(FATAL_ERROR "calculate_names needs MODEL_NAME set.")
    endif()

    if(MODEL_NAME STREQUAL "continuous")
        if("$ENV{TRAVIS}")
            message(STATUS "Travis detected")
            set(BUILDER_NAME "Travis")
            set(REPO_NAME "$ENV{TRAVIS_REPO_SLUG}")
            set(REPO_BRANCH "$ENV{TRAVIS_BRANCH}")
            set(GIT_HASH "$ENV{TRAVIS_COMMIT}")
            set(_EVENT_TYPE "$ENV{TRAVIS_EVENT_TYPE}")
        elseif("$ENV{APPVEYOR}")
            message(STATUS "AppVeyor detected")
            set(BUILDER_NAME "AppVeyor")
            set(REPO_NAME "$ENV{APPVEYOR_REPO_NAME}")
            set(REPO_BRANCH "$ENV{APPVEYOR_REPO_BRANCH}")
            set(GIT_HASH "$ENV{APPVEYOR_REPO_COMMIT}")
            if(NOT "$ENV{APPVEYOR_PULL_REQUEST_NUMBER}" STREQUAL "")
                set(_EVENT_TYPE "pull_request")
            else()
                set(_EVENT_TYPE "push")
            endif()
        else()
            message(FATAL_ERROR "Unknown CI")
        endif()
        string(SUBSTRING "${GIT_HASH}" 0 8 GIT_HASH_SHORT)
        set(BUILD_NAME "${REPO_NAME}/${REPO_BRANCH}/${_EVENT_TYPE}/${GIT_HASH_SHORT}")
     elseif(MODEL_NAME STREQUAL "experimental")
        cmake_host_system_information(RESULT BUILDER_NAME QUERY HOSTNAME)
        set(BUILD_NAME "experimental-${GIT_HASH}")
     else()
        message(FATAL_ERROR "Unknown MODEL_NAME (was '${MODEL_NAME}')")
     endif()
     set("${BUILDER_NAME_RES}" "${BUILDER_NAME}" PARENT_SCOPE)
     set("${BUILD_NAME_RES}" "${BUILD_NAME}" PARENT_SCOPE)
endfunction()