SystemD service and timer templates for duperemove.

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[Unit]
# Usage: systemctl enable --now duperemove-weekly@$(systemd-escape <path>).timer
# Utilize %J specifier for duration set.
# One can hardlink/copy with 'weekly' part changed
# to set other duration.
Description=Deduplicate %I at calendar event (%J)
After=local-fs.target
Requires=local-fs.target
Conflicts=shutdown.target rescue.target rescue.service emergency.service

[Timer]
Unit=duperemove@%i.service
RandomizedDelaySec=30
Persistent=true
OnCalendar=%J

[Install]
WantedBy=multi-user.target

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[Unit]
Description=Recursive deduplication at %I
Documentation=man:duperemove(8)
Documentation=https://github.com/markfasheh/duperemove.git
Conflicts=shutdown.target rescue.target rescue.service emergency.service
After=local-fs.target
Before=shutdown.target

[Service]
Type=simple
Environment="HashDir=/var/lib/%p"
EnvironmentFile=-/etc/default/%p
MemoryHigh=1G
IOWeight=25
CPUWeight=25
ExecStartPre=/bin/mkdir -p ${HashDir}
ExecStartPre=-/bin/df -h %I
ExecStart=/usr/bin/duperemove --hashfile=${HashDir}/%i.hashfile -r -d -h $OPTIONS %I
ExecStopPost=-/bin/df -h %I

etc-default-duperemove

# Dir to store hash files. Each instance has own, named by $(systemd-escape <instance>).hashfile
#HashDir=/var/lib/duperemove
# Additional options for duperemove binary
#OPTIONS=""