feat: systemd enabling and running

Enable or disable the service in SystemD using the hooks, also start or
restart the service in case of install or update.

.goreleaser.yaml

@@ -46,7 +46,14 @@ nfpms:
     license: MIT
     formats:
       - deb
+    contents:
+      - src: "env/debian/movies.service"
+        dst: "/lib/systemd/system/movies.service"
+      - src: "env/debian/movies.conf"
+        dst: "/etc/default/movies"
+        type: config
     scripts:
+      preremove: "env/debian/pre-remove.sh"
       postinstall: "env/debian/post-install.sh"
       postremove: "env/debian/post-remove.sh"
 

env/debian/movies.conf

@@ -0,0 +1,14 @@
+# ---------------------------------
+# Movies configuration file
+# ---------------------------------
+#
+# The commented-out settings shown in this file represent the default values.
+#
+# This file is read when movies service start
+#
+# -----------------------------------------------------------------------------
+# Datastore
+# -----------------------------------------------------------------------------
+
+# Database path configuration
+MOVIES_DB_PATH="/var/lib/movies-demo"

env/debian/movies.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Manages movie collection throught API
+Documentation="https://github.com/faabiosr/go-movies-demo"
+
+[Service]
+EnvironmentFile=/etc/default/movies
+ExecStart=/usr/bin/movies
+Restart=on-failure
+User=movies-demo
+Group=movies-demo
+KillSignal=SIGINT
+
+[Install]
+WantedBy=multi-user.target

env/debian/post-install.sh

@@ -4,6 +4,7 @@ set -e
 
 MOVIES_DB_PATH=/var/lib/movies-demo
 MOVIES_USER=movies-demo
+MOVIES_SERVICE=movies.service
 
 if [ "$1" = "configure" ]; then
     # creating user and group
@@ -20,5 +21,25 @@ if [ "$1" = "configure" ]; then
         chown $MOVIES_USER:$MOVIES_USER $MOVIES_DB_PATH
     fi
 
-    exit 0
+    # enable systemd service
+    deb-systemd-helper unmask $MOVIES_SERVICE >/dev/null || true
+
+    if deb-systemd-helper --quiet was-enabled $MOVIES_SERVICE; then
+        deb-systemd-helper enable $MOVIES_SERVICE >/dev/null || true
+    else
+        deb-systemd-helper update-state $MOVIES_SERVICE >/dev/null || true
+    fi
+
+    # starting service
+    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 $MOVIES_SERVICE >/dev/null || true
+    fi
 fi

env/debian/post-remove.sh

@@ -3,6 +3,7 @@
 set -e
 
 MOVIES_DB_PATH=/var/lib/movies-demo
+MOVIES_SERVICE=movies.service
 
 if [ "$1" = "remove" ]; then
     if [ -f "$MOVIES_DB_PATH/catalog.db" ]; then
@@ -12,5 +13,16 @@ if [ "$1" = "remove" ]; then
         rm -fr $MOVIES_DB_PATH
     fi
 
-    exit 0
+    # disabling service
+    if [ -d /run/systemd/system ]; then
+        systemctl --system daemon-reload >/dev/null || true
+    fi
+
+    deb-systemd-helper mask $MOVIES_SERVICE >/dev/null || true
+fi
+
+if [ "$1" = "purge" ]; then
+    # disabling service
+    deb-systemd-helper purge $MOVIES_SERVICE >/dev/null || true
+    deb-systemd-helper unmask $MOVIES_SERVICE >/dev/null || true
 fi

env/debian/pre-remove.sh

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+set -e
+
+MOVIES_SERVICE=movies.service
+
+# stopping service
+if [ -d /run/systemd/system ]; then
+    deb-systemd-invoke stop $MOVIES_SERVICE >/dev/null || true
+fi