cron: Add a cronjob if systemd is not available

This will allow us to build this package when systemd is not available
(e.g. on Debian kfreebsd/hurd).
Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

.gitignore

@@ -15,6 +15,7 @@ Makefile.in
 /*.db.xz
 /libtool
 /stamp-h1
+/src/cron/location-update
 /src/scripts/location
 /src/scripts/location-importer
 /src/systemd/location-update.service

Makefile.am

@@ -51,6 +51,7 @@ SED_PROCESS = \
 	-e 's,@databasedir\@,$(databasedir),g' \
 	< $< > $@ || rm $@
 
+cron_dailydir = $(sysconfdir)/cron.daily
 databasedir = $(localstatedir)/lib/location
 pkgconfigdir = $(libdir)/pkgconfig
 
@@ -281,6 +282,7 @@ CLEANFILES += \
 
 # ------------------------------------------------------------------------------
 
+# Use systemd timers if available
 if HAVE_SYSTEMD
 systemdsystemunit_DATA = \
 	src/systemd/location-update.service \
@@ -291,9 +293,18 @@ CLEANFILES += \
 
 INSTALL_DIRS += \
 	$(systemdsystemunitdir)
+
+# Otherwise fall back to cron
+else
+cron_daily_SCRIPTS = \
+	src/cron/location-update
+
+CLEANFILES += \
+	$(cron_daily_DATA)
 endif
 
 EXTRA_DIST += \
+	src/cron/location-update.in \
 	src/systemd/location-update.service.in \
 	src/systemd/location-update.timer.in
 

src/cron/location-update.in

+#!/bin/bash
+###############################################################################
+#                                                                             #
+# libloc - A library to determine the location of someone on the Internet     #
+#                                                                             #
+# Copyright (C) 2022 IPFire Development Team <info@ipfire.org>                #
+#                                                                             #
+# This library is free software; you can redistribute it and/or               #
+# modify it under the terms of the GNU Lesser General Public                  #
+# License as published by the Free Software Foundation; either                #
+# version 2.1 of the License, or (at your option) any later version.          #
+#                                                                             #
+# This library is distributed in the hope that it will be useful,             #
+# but WITHOUT ANY WARRANTY; without even the implied warranty of              #
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU           #
+# Lesser General Public License for more details.                             #
+#                                                                             #
+###############################################################################
+
+# Call the location database updater
+exec @bindir@/location update