Debian: add service and post installation script to create user and group

debian/numerus.postinst

@@ -0,0 +1,40 @@
+#!/bin/sh
+set -e
+
+. /usr/share/debconf/confmodule
+
+case "$1" in
+    configure)
+        # Create numerus user and group
+        if ! getent group numerus >/dev/null; then
+            addgroup --system --quiet numerus
+        fi
+        if ! getent passwd numerus >/dev/null; then
+            adduser --quiet \
+                    --system \
+                    --disabled-login \
+                    --no-create-home \
+                    --shell /bin/bash \
+                    --ingroup numerus \
+                    --home /usr/share/numerus \
+                    --gecos "Numerus Daemon" \
+                    numerus
+        fi
+
+        # Make sure log directory has correct permissions set
+        dpkg-statoverride --list "/var/log/numerus" >/dev/null || \
+            dpkg-statoverride --add --force --quiet --update numerus adm 0750 /var/log/numerus
+        ;;
+
+  abort-upgrade|abort-remove|abort-deconfigure)
+        ;;
+
+    *)
+        echo "postinst called with unknown argument \`$1'" >&2
+        exit 1
+        ;;
+esac
+
+#DEBHELPER#
+
+exit 0

debian/numerus.service

@@ -0,0 +1,15 @@
+[Unit]
+Description=Numerus application server
+Requires=postgresql.service
+After=postgresql.service
+
+[Service]
+Type=simple
+User=numerus
+Group=numerus
+WorkingDirectory=/usr/share/numerus
+EnvironmentFile=-/etc/default/numerus
+ExecStart=/usr/bin/numerus
+Restart=always
+StandardOutput=append:/var/log/numerus/access.log
+StandardError=append:/var/log/numerus/error.log