qubes.GetImageRGBA for appicons

Makefile

@@ -138,6 +138,7 @@ install-vm:
 	install -m 0644 qubes-rpc/qubes.WaitForSession $(DESTDIR)/etc/qubes-rpc
 	install -m 0644 qubes-rpc/qubes.DetachPciDevice $(DESTDIR)/etc/qubes-rpc
 	install -m 0644 qubes-rpc/qubes.{Backup,Restore} $(DESTDIR)/etc/qubes-rpc
+	install -m 0644 qubes-rpc/qubes.GetImageRGBA $(DESTDIR)/etc/qubes-rpc
 
 	install -d $(DESTDIR)/usr/share/file-manager/actions
 	install -m 0644 qubes-rpc/*-gnome.desktop $(DESTDIR)/usr/share/file-manager/actions

qubes-rpc/qubes.GetImageRGBA

@@ -0,0 +1,31 @@
+set -e
+read filename
+
+if [[ "${filename}" = xdgicon:* ]]; then
+    # get biggest icon from hicolor theme
+    candidate=$(find /usr/share/icons/hicolor -type f -name "${filename#*:}.png" | xargs ls --sort=size | head -1)
+
+    if [[ ! "$(basename "${candidate}")" = "${filename#*:}.png" ]]; then
+        # file not found, ls returned garbage
+        exit 1
+    fi
+    filename="${candidate}"
+
+elif [[ "${filename}" = "-" ]] || [[ "${filename}" = *":-" ]]; then
+    tmpfile="$(mktemp /tmp/qimg-XXXXXXXX)"
+    cat > "${tmpfile}"
+    if [[ "$filename" = *":-" ]]; then
+        tmpfile="${filename%:*}:${tmpfile}"
+    fi
+    filename="${tmpfile}"
+
+elif ! [[ -r "${filename}" ]]; then
+    exit 1
+fi
+
+identify -format '%w %h' "$filename"
+convert -depth 8 "$filename" rgba:-
+
+[[ -n "${tmpfile}" ]] && rm -f ${tmpfile} || true
+
+# vim: ft=sh ts=4 sw=4 et

rpm_spec/core-vm.spec

@@ -48,6 +48,7 @@ Requires:   net-tools
 Requires:   nautilus-actions
 Requires:   qubes-core-vm-kernel-placeholder
 Requires:   qubes-utils
+Requires:   ImageMagick
 Provides:   qubes-core-vm
 Obsoletes:  qubes-core-commonvm
 Obsoletes:  qubes-core-appvm
@@ -279,6 +280,7 @@ rm -f %{name}-%{version}
 /etc/qubes-rpc/qubes.DetachPciDevice
 /etc/qubes-rpc/qubes.Backup
 /etc/qubes-rpc/qubes.Restore
+/etc/qubes-rpc/qubes.GetImageRGBA
 /etc/sudoers.d/qubes
 %config(noreplace) /etc/sysconfig/iptables
 %config(noreplace) /etc/sysconfig/ip6tables