[gdm] systemd: install a gdm.service unit file by default

[Ray Strode <halfline src gnome org>]

commit a5cca5e8c228b272a985c28411311002ba092685
Author: Lennart Poettering <lennart poettering net>
Date:   Mon Aug 6 20:01:40 2012 +0200

    systemd: install a gdm.service unit file by default
    
    https://fedoraproject.org/wiki/Features/DisplayManagerRework
    
    Some changes by Ray Strode.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=681339

 configure.ac        |   10 ++++++++++
 data/.gitignore     |    1 +
 data/Makefile.am    |   32 +++++++++++++++++++++++++++++++-
 data/gdm.service.in |   13 +++++++++++++
 4 files changed, 55 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 26f7826..19033f9 100644
--- a/configure.ac
+++ b/configure.ac
@@ -276,6 +276,10 @@ AC_ARG_WITH(systemd,
             AS_HELP_STRING([--with-systemd],
                            [Add systemd support @<:@default=auto@:>@]),
             [with_systemd=$withval], [with_systemd=auto])
+AC_ARG_WITH([systemdsystemunitdir],
+            AS_HELP_STRING([--with-systemdsystemunitdir=DIR],
+                           [Directory for systemd service files]),
+                [with_systemdsystemunitdir=$withval], [with_systemdsystemunitdir=$($PKG_CONFIG --variable=systemdsystemunitdir systemd)])
 AC_ARG_WITH(plymouth,
             AS_HELP_STRING([--with-plymouth],
                            [Add plymouth support @<:@default=auto@:>@]),
@@ -942,6 +946,11 @@ AC_PATH_PROG(SYSTEMD_X_SERVER, systemd-multi-seat-x, [/lib/systemd/systemd-multi
 AC_SUBST(SYSTEMD_X_SERVER)
 AC_DEFINE_UNQUOTED(SYSTEMD_X_SERVER,"$SYSTEMD_X_SERVER",[Path to systemd X server wrapper])
 
+if test "x$with_systemdsystemunitdir" != xno; then
+        AC_SUBST(SYSTEMD_SYSTEM_UNIT_DIR, [$with_systemdsystemunitdir])
+fi
+AM_CONDITIONAL(HAVE_SYSTEMD, [test -n "$with_systemdsystemunitdir" -a "x$with_systemdsystemunitdir" != xno -a "x$use_systemd" = "xyes" ])
+
 dnl ---------------------------------------------------------------------------
 dnl - Check for plymouth support
 dnl ---------------------------------------------------------------------------
@@ -1569,6 +1578,7 @@ echo \
         XDMCP support:            ${XDMCP_SUPPORT}
         ConsoleKit support:       ${use_console_kit}
         systemd support:          ${use_systemd}
+        systemd unit dir:         ${with_systemdsystemunitdir}
         plymouth support:         ${use_plymouth}
         UPower support:           ${have_upower}
         Build with RBAC:          ${msg_rbac_shutdown}
diff --git a/data/.gitignore b/data/.gitignore
new file mode 100644
index 0000000..d9c62cb
--- /dev/null
+++ b/data/.gitignore
@@ -0,0 +1 @@
+/gdm.service
diff --git a/data/Makefile.am b/data/Makefile.am
index ffbc768..6a44b40 100644
--- a/data/Makefile.am
+++ b/data/Makefile.am
@@ -150,6 +150,22 @@ MAINTAINERCLEANFILES =			\
 	*~				\
 	Makefile.in
 
+systemdsystemunit =
+
+if HAVE_SYSTEMD
+
+gdm.service: $(srcdir)/gdm.service.in
+	$(AM_V_GEN)sed \
+		-e 's,[ ]sbindir[@],$(sbindir),g' \
+		-e 's,[ ]GDM_INITIAL_VT[@],$(GDM_INITIAL_VT),g' \
+		< $< > $@
+systemdsystemunit += gdm.service
+CLEANFILES += gdm.service
+
+endif
+
+EXTRA_DIST += gdm.service.in
+
 uninstall-hook:
 	rm -f \
 	$(DESTDIR)$(GDM_CUSTOM_CONF) \
@@ -173,7 +189,13 @@ uninstall-hook:
 	$(DESTDIR)$(sysconfdir)/dconf/db \
 	$(DESTDIR)$(sysconfdir)/dconf
 
-install-data-hook: gdm.conf-custom Xsession Init PostSession PreSession 00-upstream-settings 00-upstream-settings-locks
+	if test -n "$(systemdsystemunit)"; then \
+		rm -f $(DESTDIR)$(SYSTEMD_SYSTEM_UNIT_DIR)/$(systemdsystemunit); \
+		rmdir $(DESTDIR)$(SYSTEMD_SYSTEM_UNIT_DIR) || : ; \
+	fi
+
+
+install-data-hook: gdm.conf-custom Xsession Init PostSession PreSession 00-upstream-settings 00-upstream-settings-locks $(systemdsystemunit)
 	if test '!' -d $(DESTDIR)$(gdmconfdir); then \
 		$(mkinstalldirs) $(DESTDIR)$(gdmconfdir); \
 		chmod 755 $(DESTDIR)$(gdmconfdir); \
@@ -253,6 +275,13 @@ install-data-hook: gdm.conf-custom Xsession Init PostSession PreSession 00-upstr
 		chown root:gdm $(DESTDIR)$(xauthdir) || : ; \
 	fi
 
+	if test -n "$(systemdsystemunit)" -a '!' -d $(DESTDIR)$(SYSTEMD_SYSTEM_UNIT_DIR); then \
+		$(mkinstalldirs) $(DESTDIR)$(SYSTEMD_SYSTEM_UNIT_DIR); \
+		chmod 0755 $(DESTDIR)$(SYSTEMD_SYSTEM_UNIT_DIR); \
+		chown root:root $(DESTDIR)$(SYSTEMD_SYSTEM_UNIT_DIR) || : ; \
+		$(INSTALL_DATA) $(builddir)/$(systemdsystemunit) $(DESTDIR)$(SYSTEMD_SYSTEM_UNIT_DIR)/$(systemdsystemunit); \
+	fi
+
 	if test '!' -d $(DESTDIR)$(screenshotdir); then \
 		$(mkinstalldirs) $(DESTDIR)$(screenshotdir); \
 		chmod 0755 $(DESTDIR)$(screenshotdir); \
@@ -311,3 +340,4 @@ install-data-hook: gdm.conf-custom Xsession Init PostSession PreSession 00-upstr
 	$(INSTALL_DATA) $(srcdir)/00-upstream-settings $(DESTDIR)$(sysconfdir)/dconf/db/gdm.d
 	$(INSTALL_DATA) $(srcdir)/00-upstream-settings-locks $(DESTDIR)$(sysconfdir)/dconf/db/gdm.d/locks
 	test -z "$(DESTDIR)" && dconf update || :
+
diff --git a/data/gdm.service.in b/data/gdm.service.in
new file mode 100644
index 0000000..c15a415
--- /dev/null
+++ b/data/gdm.service.in
@@ -0,0 +1,13 @@
+[Unit]
+Description=GNOME Display Manager
+Conflicts=getty tty@GDM_INITIAL_VT  service plymouth-quit.service
+After=systemd-user-sessions.service getty tty@GDM_INITIAL_VT  service plymouth-quit.service
+
+[Service]
+ExecStart= sbindir@/gdm
+Restart=always
+IgnoreSIGPIPE=no
+BusName=org.gnome.DisplayManager
+
+[Install]
+Alias=display-manager.service