[at-spi2-core] Add a systemd user service corresponding to the D-Bus session service

[Mike Gorse <mgorse src gnome org>]

commit 02c5e3e34238f159e02c3560e28dce8c20ce691d
Author: Simon McVittie <simon mcvittie collabora co uk>
Date:   Fri Sep 25 17:07:40 2015 +0100

    Add a systemd user service corresponding to the D-Bus session service
    
    When using a systemd user session, this ensures that org.a11y.Bus
    and its child processes (such as org.a11y.atspi.Registry) are placed in
    their own cgroup, instead of being treated as part of dbus.service.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=755637

 bus/Makefile.am                |    7 +++++++
 bus/at-spi-dbus-bus.service.in |    7 +++++++
 bus/org.a11y.Bus.service.in    |    1 +
 3 files changed, 15 insertions(+), 0 deletions(-)
---
diff --git a/bus/Makefile.am b/bus/Makefile.am
index 530d231..d9664ab 100644
--- a/bus/Makefile.am
+++ b/bus/Makefile.am
@@ -25,13 +25,20 @@ dbusservice_DATA = org.a11y.Bus.service
 org.a11y.Bus.service: org.a11y.Bus.service.in
        sed -e $(substitutions) $< > $  tmp && mv $  tmp $@
 
+systemd_userdir = $(prefix)/lib/systemd/user
+systemd_user_DATA = at-spi-dbus-bus.service
+at-spi-dbus-bus.service: at-spi-dbus-bus.service.in Makefile
+       sed -e $(substitutions) $< > $  tmp && mv $  tmp $@
+
 accessibility.conf: accessibility.conf.in
        sed -e "s|[ ]DATADIR[@]|$(datadir)|" $(srcdir)/$  in > $@
 
 EXTRA_DIST += org.a11y.Bus.service.in \
+       at-spi-dbus-bus.service.in \
        accessibility.conf.in
 
 DISTCLEANFILES = org.a11y.Bus.service \
+       $(systemd_user_DATA) \
        accessibility.conf
 
 -include $(top_srcdir)/git.mk
diff --git a/bus/at-spi-dbus-bus.service.in b/bus/at-spi-dbus-bus.service.in
new file mode 100644
index 0000000..28ffa1c
--- /dev/null
+++ b/bus/at-spi-dbus-bus.service.in
@@ -0,0 +1,7 @@
+[Unit]
+Description=Accessibility services bus
+
+[Service]
+Type=dbus
+BusName=org.a11y.Bus
+ExecStart= libexecdir@/at-spi-bus-launcher
diff --git a/bus/org.a11y.Bus.service.in b/bus/org.a11y.Bus.service.in
index 60edc28..86724da 100644
--- a/bus/org.a11y.Bus.service.in
+++ b/bus/org.a11y.Bus.service.in
@@ -1,3 +1,4 @@
 [D-BUS Service]
 Name=org.a11y.Bus
 Exec= libexecdir@/at-spi-bus-launcher
+SystemdService=at-spi-dbus-bus.service