init

Makefile

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+build:
+	tar cf update-notifier.tar update-notifier update-notifier.service update-notifier.timer

PKGBUILD

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+pkgname=update-notifier
+pkgver=1.0.2
+pkgrel=3
+pkgdesc="notifies when updates are available via checkupdates"
+arch=('x86_64')
+depends=('pacman-contrib')
+url=''
+license=()
+source=(${pkgname}.tar)
+package() {
+    install -D "${srcdir}/${pkgname}" "$pkgdir/usr/bin/update-notifier"
+    install -D "${pkgname}.service" "${pkgdir}/usr/lib/systemd/user/${pkgname}.service"
+    install -D "${pkgname}.timer" "${pkgdir}/usr/lib/systemd/user/${pkgname}.timer"
+}
+
+sha256sums=('b663e014d5b3baa122e8e91a6eaf781f11e5cb09b83965c2e325d6939d061fc7')

update-notifier

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+#!/usr/bin/env bash
+#export DBUS_SESSION_BUS_ADDRESS="${DBUS_SESSION_BUS_ADDRESS:-unix:path=/run/user/${UID}/bus}"
+#export DISPLAY=:0
+n=$(checkupdates | wc -l)
+if [ "$n" != "0" ]; then
+    notify-send "System update" "$n updates available."
+fi
+notify-send "hallo"

update-notifier.service

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+[Unit]
+Description=Check for updates using checkupdates
+
+[Service]
+Type=simple
+ExecStart=/usr/bin/update-notifier

update-notifier.timer

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+[Unit]
+Description=Runs update-notifier periodically
+
+[Timer]
+OnBootSec=5min
+OnUnitActiveSec=3h
+Unit=update-notifier.Service
+
+[Install]
+WantedBy=timers.target