Make systemd units installable

src/Makefile.am

@@ -357,8 +357,8 @@ doc/user/custom.xsl doc/user/usermanual.xml \
 filters/injectcommon.sh filters/recfiltcommon filters/rcltxtlines.py \
 \
 index/rclmon.sh \
-index/recollindex-system.service \
-index/recollindex-user.service \
+index/recollindex@.service \
+index/recollindex.service \
 \
 kde/kioslave/kio_recoll/00README.txt \
 kde/kioslave/kio_recoll/CMakeLists.txt \
@@ -654,8 +654,8 @@ defconfdir = $(pkgdatadir)/examples
 defconf_DATA = \
 desktop/recollindex.desktop \
 index/rclmon.sh \
-index/recollindex-system.service \
-index/recollindex-user.service \
+index/recollindex@.service \
+index/recollindex.service \
 sampleconf/fragbuts.xml \
 sampleconf/fields \
 sampleconf/recoll.conf \
@@ -749,6 +749,13 @@ filters/xml.xsl \
 python/recoll/recoll/conftree.py \
 python/recoll/recoll/rclconfig.py 
 
+if INSTALL_SYSTEMD_UNITS
+systemd_system_unitdir = @SYSTEMD_SYSTEM_UNIT_DIR@
+systemd_user_unitdir = @SYSTEMD_USER_UNIT_DIR@
+systemd_system_unit_DATA = index/recollindex@.service
+systemd_user_unit_DATA = index/recollindex.service
+endif
+
 install-data-hook: 
 	(cd $(DESTDIR)/$(filterdir); \
 	chmod a+x rcl* ppt-dump.py xls-dump.py xlsxmltocsv.py hotrecoll.py; \

src/configure.ac

@@ -471,6 +471,46 @@ if test X$enableQT = Xyes ; then
   ##################### End QT stuff
 fi
 
+dnl Borrow a macro definition from pkg.config,
+dnl for older installs that lack it.
+m4_ifndef([PKG_CHECK_VAR], [
+dnl PKG_CHECK_VAR(VARIABLE, MODULE, CONFIG-VARIABLE,
+dnl [ACTION-IF-FOUND], [ACTION-IF-NOT-FOUND])
+dnl -------------------------------------------
+dnl Retrieves the value of the pkg-config variable for the given module.
+AC_DEFUN([PKG_CHECK_VAR],
+[AC_REQUIRE([PKG_PROG_PKG_CONFIG])dnl
+AC_ARG_VAR([$1], [value of $3 for $2, overriding pkg-config])dnl
+
+_PKG_CONFIG([$1], [variable="][$3]["], [$2])
+AS_VAR_COPY([$1], [pkg_cv_][$1])
+
+AS_VAR_IF([$1], [""], [$5], [$4])dnl
+])dnl PKG_CHECK_VAR
+])
+
+### Systemd
+AC_ARG_WITH([systemd],
+    AC_HELP_STRING([--without-systemd],
+        [Disable installation of the systemd unit files.]))
+AC_ARG_WITH([system-unit-dir],
+    AC_HELP_STRING([--with-system-unit-dir=DIR],
+        [Install location for systemd system unit files]),
+    [SYSTEMD_SYSTEM_UNIT_DIR="$withval"],
+    [PKG_CHECK_VAR([SYSTEMD_SYSTEM_UNIT_DIR], [systemd], [systemd_system_unit_dir])])
+AC_ARG_WITH([user-unit-dir],
+    AC_HELP_STRING([--with-user-unit-dir=DIR],
+        [Install location for systemd user unit files]),
+    [SYSTEMD_USER_UNIT_DIR="$withval"],
+    [PKG_CHECK_VAR([SYSTEMD_USER_UNIT_DIR], [systemd], [systemd_user_unit_dir])])
+
+if test "x$SYSTEMD_SYSTEM_UNIT_DIR" = "x" -o \
+        "x$SYSTEMD_USER_UNIT_DIR" = "x"; then
+    with_systemd = "no"
+fi
+
+AM_CONDITIONAL([INSTALL_SYSTEMD_UNITS], [test "X$with_systemd" != "Xno"])
+
 ### X11: this is needed for the session monitoring code (in recollindex -m)
 AC_ARG_ENABLE(x11mon, 
     AC_HELP_STRING([--disable-x11mon],
@@ -532,6 +572,8 @@ AC_SUBST(RCLVERSION)
 AC_SUBST(RCLLIBVERSION)
 AC_SUBST(XSLT_CFLAGS)
 AC_SUBST(XSLT_LIBS)
+AC_SUBST([SYSTEMD_SYSTEM_UNIT_DIR])
+AC_SUBST([SYSTEMD_USER_UNIT_DIR])
 
 AC_CONFIG_FILES([Makefile python/recoll/setup.py
  python/pychm/setup.py])

src/index/recollindex-system.service

@@ -1,14 +0,0 @@
-[Unit]
-Description=Recollindex indexing for @SOMEUSER@
-After=network-online.target
-RequiresMountsFor=/home/@SOMEUSER@
-
-[Service]
-Type=simple
-Restart=on-failure
-RestartSec=30
-ExecStart=/usr/bin/recollindex -m -D -x -w 10 -c /home/@SOMEUSER@/.recoll
-User=@SOMEUSER@
-
-[Install]
-WantedBy=multi-user.target

src/index/recollindex@.service

@@ -0,0 +1,16 @@
+# Instantiate with a username as argument
+# e.g. `systemctl enable recollindex@myuser.service`
+[Unit]
+Description=Recollindex indexing for %i
+After=network-online.target
+RequiresMountsFor=/home/%i
+
+[Service]
+Type=simple
+Restart=on-failure
+RestartSec=30
+ExecStart=/usr/bin/recollindex -m -D -x -w 10 -c /home/%i/.recoll
+User=%i
+
+[Install]
+WantedBy=multi-user.target