eclass/xdg: upgrade for EAPI 7

BUG=chromium:1099508
TEST=build

Change-Id: I40b8e5b12547730baf8ec53349e6c5b26dda9700
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2268632
Tested-by: Brian Norris <briannorris@chromium.org>
Reviewed-by: Allen Webb <allenwebb@google.com>
Commit-Queue: Brian Norris <briannorris@chromium.org>
diff --git a/eclass/xdg.eclass b/eclass/xdg.eclass
index fd4816b..219be71 100644
--- a/eclass/xdg.eclass
+++ b/eclass/xdg.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2015 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: xdg.eclass
@@ -6,15 +6,16 @@
 # freedesktop-bugs@gentoo.org
 # @AUTHOR:
 # Original author: Gilles Dartiguelongue <eva@gentoo.org>
+# @SUPPORTED_EAPIS: 4 5 6 7
 # @BLURB: Provides phases for XDG compliant packages.
 # @DESCRIPTION:
-# Utility eclass to update the desktop and shared mime info as laid
+# Utility eclass to update the desktop, icon and shared mime info as laid
 # out in the freedesktop specs & implementations
 
 inherit xdg-utils
 
 case "${EAPI:-0}" in
-	4|5|6)
+	4|5|6|7)
 		EXPORT_FUNCTIONS src_prepare pkg_preinst pkg_postinst pkg_postrm
 		;;
 	*) die "EAPI=${EAPI} is not supported" ;;
@@ -34,33 +35,36 @@
 xdg_src_prepare() {
 	xdg_environment_reset
 
-	has ${EAPI:-0} 6 && default
+	[[ ${EAPI:-0} != [45] ]] && default
 }
 
 # @FUNCTION: xdg_pkg_preinst
 # @DESCRIPTION:
-# Finds .desktop and mime info files for later handling in pkg_postinst.
-# Locations are stored in XDG_ECLASS_DESKTOPFILES and XDG_ECLASS_MIMEINFOFILES
-# respectively.
+# Finds .desktop, icon and mime info files for later handling in pkg_postinst.
+# Locations are stored in XDG_ECLASS_DESKTOPFILES, XDG_ECLASS_ICONFILES
+# and XDG_ECLASS_MIMEINFOFILES respectively.
 xdg_pkg_preinst() {
 	local f
 
 	XDG_ECLASS_DESKTOPFILES=()
 	while IFS= read -r -d '' f; do
 		XDG_ECLASS_DESKTOPFILES+=( ${f} )
-	done < <(cd "${D}" && find 'usr/share/applications' -type f -print0 2>/dev/null)
+	done < <(cd "${ED}" && find 'usr/share/applications' -type f -print0 2>/dev/null)
+
+	XDG_ECLASS_ICONFILES=()
+	while IFS= read -r -d '' f; do
+		XDG_ECLASS_ICONFILES+=( ${f} )
+	done < <(cd "${ED}" && find 'usr/share/icons' -type f -print0 2>/dev/null)
 
 	XDG_ECLASS_MIMEINFOFILES=()
 	while IFS= read -r -d '' f; do
 		XDG_ECLASS_MIMEINFOFILES+=( ${f} )
-	done < <(cd "${D}" && find 'usr/share/mime' -type f -print0 2>/dev/null)
-
-	export XDG_ECLASS_DESKTOPFILES XDG_ECLASS_MIMEINFOFILES
+	done < <(cd "${ED}" && find 'usr/share/mime' -type f -print0 2>/dev/null)
 }
 
 # @FUNCTION: xdg_pkg_postinst
 # @DESCRIPTION:
-# Handle desktop and mime info database updates.
+# Handle desktop, icon and mime info database updates.
 xdg_pkg_postinst() {
 	if [[ ${#XDG_ECLASS_DESKTOPFILES[@]} -gt 0 ]]; then
 		xdg_desktop_database_update
@@ -68,6 +72,12 @@
 		debug-print "No .desktop files to add to database"
 	fi
 
+	if [[ ${#XDG_ECLASS_ICONFILES[@]} -gt 0 ]]; then
+		xdg_icon_cache_update
+	else
+		debug-print "No icon files to add to cache"
+	fi
+
 	if [[ ${#XDG_ECLASS_MIMEINFOFILES[@]} -gt 0 ]]; then
 		xdg_mimeinfo_database_update
 	else
@@ -77,7 +87,7 @@
 
 # @FUNCTION: xdg_pkg_postrm
 # @DESCRIPTION:
-# Handle desktop and mime info database updates.
+# Handle desktop, icon and mime info database updates.
 xdg_pkg_postrm() {
 	if [[ ${#XDG_ECLASS_DESKTOPFILES[@]} -gt 0 ]]; then
 		xdg_desktop_database_update
@@ -85,6 +95,12 @@
 		debug-print "No .desktop files to add to database"
 	fi
 
+	if [[ ${#XDG_ECLASS_ICONFILES[@]} -gt 0 ]]; then
+		xdg_icon_cache_update
+	else
+		debug-print "No icon files to add to cache"
+	fi
+
 	if [[ ${#XDG_ECLASS_MIMEINFOFILES[@]} -gt 0 ]]; then
 		xdg_mimeinfo_database_update
 	else