nixpkgs/pkgs/development/libraries/kde-frameworks/extra-cmake-modules/setup-hook.sh

ecmEnvHook() {
    addToSearchPath XDG_DATA_DIRS "$1/share"
    addToSearchPath XDG_CONFIG_DIRS "$1/etc/xdg"
}
addEnvHooks "$targetOffset" ecmEnvHook

ecmPostHook() {
    # Because we need to use absolute paths here, we must set *all* the paths.
    cmakeFlags+=" -DKDE_INSTALL_EXECROOTDIR=${!outputBin}"
    cmakeFlags+=" -DKDE_INSTALL_BINDIR=${!outputBin}/bin"
    cmakeFlags+=" -DKDE_INSTALL_SBINDIR=${!outputBin}/sbin"
    cmakeFlags+=" -DKDE_INSTALL_LIBDIR=${!outputLib}/lib"
    cmakeFlags+=" -DKDE_INSTALL_LIBEXECDIR=${!outputLib}/libexec"
    cmakeFlags+=" -DKDE_INSTALL_CMAKEPACKAGEDIR=${!outputDev}/lib/cmake"
    cmakeFlags+=" -DKDE_INSTALL_INCLUDEDIR=${!outputInclude}/include"
    cmakeFlags+=" -DKDE_INSTALL_LOCALSTATEDIR=/var"
    cmakeFlags+=" -DKDE_INSTALL_DATAROOTDIR=${!outputBin}/share"
    cmakeFlags+=" -DKDE_INSTALL_DATADIR=${!outputBin}/share"
    cmakeFlags+=" -DKDE_INSTALL_DOCBUNDLEDIR=${!outputBin}/share/doc/HTML"
    cmakeFlags+=" -DKDE_INSTALL_KCFGDIR=${!outputBin}/share/config.kcfg"
    cmakeFlags+=" -DKDE_INSTALL_KCONFUPDATEDIR=${!outputBin}/share/kconf_update"
    cmakeFlags+=" -DKDE_INSTALL_KSERVICES5DIR=${!outputBin}/share/kservices5"
    cmakeFlags+=" -DKDE_INSTALL_KSERVICETYPES5DIR=${!outputBin}/share/kservicetypes5"
    cmakeFlags+=" -DKDE_INSTALL_KXMLGUI5DIR=${!outputBin}/share/kxmlgui5"
    cmakeFlags+=" -DKDE_INSTALL_KNOTIFY5RCDIR=${!outputBin}/share/knotifications5"
    cmakeFlags+=" -DKDE_INSTALL_ICONDIR=${!outputBin}/share/icons"
    cmakeFlags+=" -DKDE_INSTALL_LOCALEDIR=${!outputLib}/share/locale"
    cmakeFlags+=" -DKDE_INSTALL_SOUNDDIR=${!outputBin}/share/sounds"
    cmakeFlags+=" -DKDE_INSTALL_TEMPLATEDIR=${!outputBin}/share/templates"
    cmakeFlags+=" -DKDE_INSTALL_WALLPAPERDIR=${!outputBin}/share/wallpapers"
    cmakeFlags+=" -DKDE_INSTALL_APPDIR=${!outputBin}/share/applications"
    cmakeFlags+=" -DKDE_INSTALL_DESKTOPDIR=${!outputBin}/share/desktop-directories"
    cmakeFlags+=" -DKDE_INSTALL_MIMEDIR=${!outputBin}/share/mime/packages"
    cmakeFlags+=" -DKDE_INSTALL_METAINFODIR=${!outputBin}/share/appdata"
    cmakeFlags+=" -DKDE_INSTALL_MANDIR=${!outputBin}/share/man"
    cmakeFlags+=" -DKDE_INSTALL_INFODIR=${!outputBin}/share/info"
    cmakeFlags+=" -DKDE_INSTALL_DBUSDIR=${!outputBin}/share/dbus-1"
    cmakeFlags+=" -DKDE_INSTALL_DBUSINTERFACEDIR=${!outputBin}/share/dbus-1/interfaces"
    cmakeFlags+=" -DKDE_INSTALL_DBUSSERVICEDIR=${!outputBin}/share/dbus-1/services"
    cmakeFlags+=" -DKDE_INSTALL_DBUSSYSTEMSERVICEDIR=${!outputBin}/share/dbus-1/system-services"
    cmakeFlags+=" -DKDE_INSTALL_SYSCONFDIR=${!outputBin}/etc"
    cmakeFlags+=" -DKDE_INSTALL_CONFDIR=${!outputBin}/etc/xdg"
    cmakeFlags+=" -DKDE_INSTALL_AUTOSTARTDIR=${!outputBin}/etc/xdg/autostart"

    if [ -n "${qtPluginPrefix-}" ]; then
        cmakeFlags+=" -DKDE_INSTALL_QTPLUGINDIR=${!outputBin}/$qtPluginPrefix"
        cmakeFlags+=" -DKDE_INSTALL_PLUGINDIR=${!outputBin}/$qtPluginPrefix"
    fi

    if [ -n "${qtQmlPrefix-}" ]; then
        cmakeFlags+=" -DKDE_INSTALL_QMLDIR=${!outputBin}/$qtQmlPrefix"
    fi
}
postHooks+=(ecmPostHook)

xdgDataSubdirs=( \
    "config.kcfg" "kconf_update" "kservices5" "kservicetypes5" \
    "kxmlgui5" "knotifications5" "icons" "locale" "sounds" "templates" \
    "wallpapers" "applications" "desktop-directories" "mime" "appdata" "dbus-1" \
)

ecmHostPathSeen=( )

ecmUnseenHostPath() {
    for pkg in "${ecmHostPathSeen[@]}"
    do
        if [ "${pkg:?}" == "$1" ]
        then
            return 1
        fi
    done

    ecmHostPathSeen+=("$1")
    return 0
}

ecmHostPathHook() {
    ecmUnseenHostPath "$1" || return 0

    local xdgConfigDir="$1/etc/xdg"
    if [ -d "$xdgConfigDir" ]
    then
        qtWrapperArgs+=(--prefix XDG_CONFIG_DIRS : "$xdgConfigDir")
    fi

    for xdgDataSubdir in "${xdgDataSubdirs[@]}"
    do
        if [ -d "$1/share/$xdgDataSubdir" ]
        then
            qtWrapperArgs+=(--prefix XDG_DATA_DIRS : "$1/share")
            break
        fi
    done

    local manDir="$1/man"
    if [ -d "$manDir" ]
    then
        qtWrapperArgs+=(--prefix MANPATH : "$manDir")
    fi

    local infoDir="$1/info"
    if [ -d "$infoDir" ]
    then
        qtWrapperArgs+=(--prefix INFOPATH : "$infoDir")
    fi

    if [ -d "$1/dbus-1" ]
    then
        propagatedUserEnvPkgs+=" $1"
    fi
}
addEnvHooks "$targetOffset" ecmHostPathHook