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diff --git a/eclass/xdg-utils-r1.eclass b/eclass/xdg-utils-r1.eclass
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+# Copyright 1999-2018 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: xdg-utils.eclass
+# @MAINTAINER:
+# gnome@gentoo.org
+# @AUTHOR:
+# Original author: Gilles Dartiguelongue <eva@gentoo.org>
+# @BLURB: Auxiliary functions commonly used by XDG compliant packages.
+# @DESCRIPTION:
+# This eclass provides a set of auxiliary functions needed by most XDG
+# compliant packages.
+# It provides XDG stack related functions such as:
+#  * XDG .desktop files cache management
+#  * XDG mime information database management
+
+case "${EAPI:-0}" in
+	0|1|2|3|4|5|6|7) ;;
+	*) die "EAPI=${EAPI} is not supported" ;;
+esac
+
+# @ECLASS-VARIABLE: DESKTOP_DATABASE_UPDATE_BIN
+# @INTERNAL
+# @DESCRIPTION:
+# Path to update-desktop-database
+: "${DESKTOP_DATABASE_UPDATE_BIN:="/usr/bin/update-desktop-database"}"
+
+# @ECLASS-VARIABLE: DESKTOP_DATABASE_DIR
+# @INTERNAL
+# @DESCRIPTION:
+# Directory where .desktop files database is stored
+: "${DESKTOP_DATABASE_DIR="/usr/share/applications"}"
+
+# @ECLASS-VARIABLE: GTK_UPDATE_ICON_CACHE
+# @INTERNAL
+# @DESCRIPTION:
+# Path to gtk-update-icon-cache
+: "${GTK_UPDATE_ICON_CACHE:="/usr/bin/gtk-update-icon-cache"}"
+
+# @ECLASS-VARIABLE: MIMEINFO_DATABASE_UPDATE_BIN
+# @INTERNAL
+# @DESCRIPTION:
+# Path to update-mime-database
+: "${MIMEINFO_DATABASE_UPDATE_BIN:="/usr/bin/update-mime-database"}"
+
+# @ECLASS-VARIABLE: MIMEINFO_DATABASE_DIR
+# @INTERNAL
+# @DESCRIPTION:
+# Directory where .desktop files database is stored
+: "${MIMEINFO_DATABASE_DIR:="/usr/share/mime"}"
+
+# @ECLASS-VARIABLE: XDG_ECLASS_ICONS
+# @INTERNAL
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# List of icons provided by the package
+
+# @FUNCTION: xdg_environment_reset
+# @DESCRIPTION:
+# Clean up environment for clean builds.
+xdg_environment_reset() {
+	# Prepare XDG base directories
+	export XDG_DATA_HOME="${HOME}/.local/share"
+	export XDG_CONFIG_HOME="${HOME}/.config"
+	export XDG_CACHE_HOME="${HOME}/.cache"
+	export XDG_RUNTIME_DIR="${T}/run"
+	mkdir -p "${XDG_DATA_HOME}" "${XDG_CONFIG_HOME}" "${XDG_CACHE_HOME}" \
+		"${XDG_RUNTIME_DIR}" || die
+	# This directory needs to be owned by the user, and chmod 0700
+	# https://standards.freedesktop.org/basedir-spec/basedir-spec-latest.html
+	chmod 0700 "${XDG_RUNTIME_DIR}" || die
+
+	unset DBUS_SESSION_BUS_ADDRESS
+}
+
+# @FUNCTION: xdg_desktop_database_update
+# @DESCRIPTION:
+# Updates the .desktop files database.
+# Generates a list of mimetypes linked to applications that can handle them
+xdg_desktop_database_update() {
+		has ${EAPI:-0} 7 || BROOT="${EROOT}"
+        local updater="${BROOT%/}${DESKTOP_DATABASE_UPDATE_BIN}"
+
+        if [[ ${EBUILD_PHASE} != post* ]] ; then
+                die "xdg_desktop_database_update must be used in pkg_post* phases."
+        fi
+
+        if [[ ! -x "${updater}" ]] ; then
+                debug-print "${updater} is not executable"
+                return
+        fi
+
+        ebegin "Updating .desktop files database"
+        "${updater}" -q "${EROOT}${DESKTOP_DATABASE_DIR}"
+        eend $?
+}
+
+# @FUNCTION: xdg_icon_savelist
+# @DESCRIPTION:
+# Find the icons that are about to be installed and save their location
+# in the XDG_ECLASS_ICONS environment variable. This is only
+# necessary for eclass implementations that call
+# xdg_icon_cache_update conditionally.
+# This function should be called from pkg_preinst.
+xdg_icon_savelist() {
+	XDG_ECLASS_ICONS=()
+	while IFS= read -r -d '' f; do
+		XDG_ECLASS_ICONS+=( "${f}" )
+	done < <(cd "${D}" && find 'usr/share/icons' -type f -print0 2>/dev/null)
+
+	export XDG_ECLASS_ICONS
+}
+
+# @FUNCTION: xdg_icon_cache_update
+# @DESCRIPTION:
+# Updates Gtk+ icon cache files under /usr/share/icons.
+# This function should be called from pkg_postinst and pkg_postrm.
+xdg_icon_cache_update() {
+	has ${EAPI:-0} 7 || BROOT="${EROOT}"
+	local updater="${BROOT%/}${GTK_UPDATE_ICON_CACHE}"
+
+	if [[ ! -x "${updater}" ]] ; then
+		debug-print "${updater} is not executable"
+		return
+	fi
+
+	ebegin "Updating icons cache"
+
+	local retval=0
+	local fails=( )
+
+	for dir in "${EROOT%/}"/usr/share/icons/*
+	do
+		if [[ -f "${dir}/index.theme" ]] ; then
+			local rv=0
+
+			"${updater}" -qf "${dir}"
+			rv=$?
+
+			if [[ ! $rv -eq 0 ]] ; then
+					debug-print "Updating cache failed on ${dir}"
+
+					# Add to the list of failures
+					fails+=( "${dir}" )
+
+					retval=2
+			fi
+		elif [[ $(ls "${dir}") = "icon-theme.cache" ]]; then
+			# Clear stale cache files after theme uninstallation
+			rm "${dir}/icon-theme.cache"
+		fi
+
+		if [[ -z $(ls "${dir}") ]]; then
+			# Clear empty theme directories after theme uninstallation
+			rmdir "${dir}"
+		fi
+	done
+
+	eend ${retval}
+
+	for f in "${fails[@]}" ; do
+		eerror "Failed to update cache with icon $f"
+	done
+}
+
+# @FUNCTION: xdg_mimeinfo_database_update
+# @DESCRIPTION:
+# Update the mime database.
+# Creates a general list of mime types from several sources
+xdg_mimeinfo_database_update() {
+	has ${EAPI:-0} 7 || BROOT="${EROOT}"
+	local updater="${BROOT%/}${MIMEINFO_DATABASE_UPDATE_BIN}"
+
+	if [[ ${EBUILD_PHASE} != post* ]] ; then
+		die "xdg_mimeinfo_database_update must be used in pkg_post* phases."
+	fi
+
+	if [[ ! -x "${updater}" ]] ; then
+		debug-print "${updater} is not executable"
+		return
+	fi
+
+	ebegin "Updating shared mime info database"
+	"${updater}" "${BROOT%/}${MIMEINFO_DATABASE_DIR}"
+	eend $?
+}