From 8a5857967a61958269e7f58a93913ab7fdab7bb8 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <steinar+git@gunderson.no>
Date: Sat, 28 Nov 2020 23:08:23 +0100
Subject: [PATCH] Add a systemd service and timer for updatedb, obsoleting the
 cron entry.

---
 README                      |  3 ++-
 meson.build                 | 12 ++++++++++++
 meson_options.txt           |  3 ++-
 plocate-updatedb.service.in | 14 ++++++++++++++
 plocate-updatedb.timer      |  9 +++++++++
 5 files changed, 39 insertions(+), 2 deletions(-)
 create mode 100644 plocate-updatedb.service.in
 create mode 100644 plocate-updatedb.timer

diff --git a/README b/README
index 75da95b..df4b07a 100644
--- a/README
+++ b/README
@@ -16,10 +16,11 @@ do not have an SSD. Installation is run as:
   cd obj
   ninja
   sudo ninja install
+  sudo addgroup plocate
+  sudo systemctl enable plocate-updatedb.timer
 
 To build the database for the first time after install, you can do
 
-  sudo addgroup mlocate
   sudo updatedb
 
 The initial run of updatedb needs to scan the entire filesystem.
diff --git a/meson.build b/meson.build
index 31f51d8..b963c03 100644
--- a/meson.build
+++ b/meson.build
@@ -63,6 +63,18 @@ endif
 install_man('plocate.1')
 install_man('plocate-build.8')
 
+if get_option('install_systemd')
+	systemd = dependency('systemd', required: false)
+	if systemd.found()
+		unitdir = systemd.get_pkgconfig_variable('systemdsystemunitdir')
+		updatedb_service = configure_file(input: 'plocate-updatedb.service.in',
+		       output: 'plocate-updatedb.service',
+		       configuration: conf_data)
+		install_data(updatedb_service, install_dir: unitdir)
+		install_data('plocate-updatedb.timer', install_dir: unitdir)
+	endif
+endif
+
 # Requires having TurboPFor checked out, so not built by default.
 # Unless you have a recent Meson, there's no apparently good way
 # of calling into that directory to run make, and we're not
diff --git a/meson_options.txt b/meson_options.txt
index 3e2f6cc..f261155 100644
--- a/meson_options.txt
+++ b/meson_options.txt
@@ -1,2 +1,3 @@
-option('install_cron', type: 'boolean', value: true, description: 'Install update script into /etc/cron.daily')
+option('install_cron', type: 'boolean', value: false, description: 'Install mlocate conversion script into /etc/cron.daily')
+option('install_systemd', type: 'boolean', value: true, description: 'Install systemd service and timer for updatedb, if systemd is installed')
 option('locategroup', type: 'string', value: 'plocate', description: 'Group that the install script will use for the .db file')
diff --git a/plocate-updatedb.service.in b/plocate-updatedb.service.in
new file mode 100644
index 0000000..8db7dba
--- /dev/null
+++ b/plocate-updatedb.service.in
@@ -0,0 +1,14 @@
+[Unit]
+Description=Update the plocate database
+ConditionACPower=true
+
+[Service]
+Type=oneshot
+ExecStart=@sbindir@/updatedb
+LimitNOFILE=131072
+IOSchedulingClass=idle
+
+PrivateTmp=true
+PrivateDevices=true
+PrivateNetwork=true
+ProtectSystem=full
diff --git a/plocate-updatedb.timer b/plocate-updatedb.timer
new file mode 100644
index 0000000..1f69330
--- /dev/null
+++ b/plocate-updatedb.timer
@@ -0,0 +1,9 @@
+[Unit]
+Description=Update the plocate database daily
+
+[Timer]
+OnCalendar=daily
+Persistent=true
+
+[Install]
+WantedBy=timers.target
-- 
2.39.2