Add elwig-backend.service to .deb package

pkg/deb.sh

@@ -8,6 +8,12 @@ mkdir -p build/
 mkdir -p build/usr/bin/
 cp src/elwig-backend build/usr/bin
 
+mkdir -p build/lib/systemd/system/
+cp pkg/elwig-backend.service build/lib/systemd/system
+
+mkdir -p build/etc/elwig
+cp backend.sample.ini build/etc/elwig/backend.ini
+
 mkdir -p build/DEBIAN/
 echo -n "\
 Package: elwig-backend
@@ -17,11 +23,15 @@ Priority: optional
 Essential: no
 Architecture: all
 Depends: python3
-Installed-Size: $(du -ks build/usr/bin/ | cut -f 1)
+Installed-Size: $(du -ks build/usr/bin/ build/etc/ build/lib/systemd/system/ | cut -f 1 | paste -sd+ | bc)
 Maintainer: Lorenz Stechauner <lorenz.stechauner@necronda.net>
 Homepage: https://git.necronda.net/winzer/elwig-backend
 Description: Local backend for Elwig's REST API
 " > build/DEBIAN/control
+echo -n "\
+/etc/elwig/backend.ini
+" > build/DEBIAN/conffiles
+cp pkg/postinst pkg/prerm pkg/postrm build/DEBIAN
 
 chmod 0755 build/usr/bin/*
 sudo chown root:root -R build/

pkg/elwig-backend.service

@@ -0,0 +1,13 @@
+[Unit]
+Description=Elwig backend
+After=network.target
+
+[Service]
+RestartSec=5s
+Type=simple
+User=nobody
+ExecStart=/usr/bin/elwig-backend /etc/elwig/backend.ini
+Restart=on-failure
+
+[Install]
+WantedBy=multi-user.target

pkg/postinst

@@ -0,0 +1,25 @@
+#!/bin/sh
+set -e
+if [ "$1" = "configure" ] || [ "$1" = "abort-upgrade" ] || [ "$1" = "abort-deconfigure" ] || [ "$1" = "abort-remove" ] ; then
+  # This will only remove masks created by d-s-h on package removal.
+  deb-systemd-helper unmask 'elwig-backend.service' >/dev/null || true
+  # was-enabled defaults to true, so new installations run enable.
+  if deb-systemd-helper --quiet was-enabled 'elwig-backend.service'; then
+    # Enables the unit on first installation, creates new
+    # symlinks on upgrades if the unit file has changed.
+    deb-systemd-helper enable 'elwig-backend.service' >/dev/null || true
+  else
+    # Update the statefile to add new symlinks (if any), which need to be
+    # cleaned up on purge. Also remove old symlinks.
+    deb-systemd-helper update-state 'elwig-backend.service' >/dev/null || true
+  fi
+  if [ -d /run/systemd/system ]; then
+    systemctl --system daemon-reload >/dev/null || true
+    if [ -n "$2" ]; then
+      _dh_action=restart
+    else
+      _dh_action=start
+    fi
+    deb-systemd-invoke $_dh_action 'elwig-backend.service' >/dev/null || true
+  fi
+fi

pkg/postrm

@@ -0,0 +1,16 @@
+#!/bin/sh
+set -e
+if [ -d /run/systemd/system ]; then
+  systemctl --system daemon-reload >/dev/null || true
+fi
+if [ "$1" = "remove" ]; then
+  if [ -x "/usr/bin/deb-systemd-helper" ]; then
+    deb-systemd-helper mask 'elwig-backend.service' >/dev/null || true
+  fi
+fi
+if [ "$1" = "purge" ]; then
+  if [ -x "/usr/bin/deb-systemd-helper" ]; then
+    deb-systemd-helper purge 'elwig-backend.service' >/dev/null || true
+    deb-systemd-helper unmask 'elwig-backend.service' >/dev/null || true
+  fi
+fi

pkg/prerm

@@ -0,0 +1,5 @@
+#!/bin/sh
+set -e
+if [ -d /run/systemd/system ] && [ "$1" = remove ]; then
+  deb-systemd-invoke stop 'elwig-backend.service' >/dev/null || true
+fi