Replace individually installed systemd units with zfs-auto.target

Author: jakelee8

Makefile

@@ -14,3 +14,4 @@ install:
 	install timers/zfs-auto-hourly.timer $(DESTDIR)$(PREFIX)/lib/systemd/system/zfs-auto-hourly.timer
 	install timers/zfs-auto-weekly.service $(DESTDIR)$(PREFIX)/lib/systemd/system/zfs-auto-weekly.service
 	install timers/zfs-auto-weekly.timer $(DESTDIR)$(PREFIX)/lib/systemd/system/zfs-auto-weekly.timer
+	install timers/zfs-auto.target $(DESTDIR)$(PREFIX)/lib/systemd/system/zfs-auto.target

README.md

@@ -29,12 +29,10 @@ You can find some example `.timer` files in the `timers/` directory of this repo
 You can enable the timers as follows:
 ```
 sudo systemctl daemon-reload
-sudo systemctl start zfs-auto-hourly.timer && sudo systemctl enable zfs-auto-hourly.timer
-sudo systemctl start zfs-auto-daily.timer && sudo systemctl enable zfs-auto-daily.timer
-sudo systemctl start zfs-auto-weekly.timer && sudo systemctl enable zfs-auto-weekly.timer
+sudo systemctl start zfs-auto.target && sudo systemctl enable zfs-auto.target
 ```
 
-If you wish to edit the timers, you will find them in the `/etc/systemd/system/` directory.
+If you wish to edit the timers, you will find them in the `/usr/local/lib/systemd/system/` directory. Save the edited timers to `/etc/systemd/system/` directory.
 
 
 Managing Which Pools to Snapshot

timers/zfs-auto-daily.timer

@@ -3,6 +3,3 @@ Description=Daily ZFS snapshots at 1:20AM.
 
 [Timer]
 OnCalendar=*-*-* 01:20:00
- 
-[Install]
-WantedBy=timers.target

timers/zfs-auto-hourly.timer

@@ -3,6 +3,3 @@ Description=Hourly ZFS snapshots at 0min past the hour.
 
 [Timer]
 OnCalendar=*-*-* *:00:00
- 
-[Install]
-WantedBy=timers.target

timers/zfs-auto-weekly.timer

@@ -3,6 +3,3 @@ Description=Weekly ZFS snapshots on Mondays at 1:30AM.
 
 [Timer]
 OnCalendar=Mon *-*-* 01:30:00
- 
-[Install]
-WantedBy=timers.target

timers/zfs-auto.target

@@ -0,0 +1,8 @@
+[Unit]
+Description=Automatically create, rotate, and destroy periodic ZFS snapshots.
+Requires=zfs-auto-daily.timer
+Requires=zfs-auto-hourly.timer
+Requires=zfs-auto-weekly.timer
+
+[Install]
+WantedBy=timers.target