Debian package builder

build/debian/DEBIAN/postinst

@@ -0,0 +1,84 @@
+#!/bin/bash
+set -e
+set -o pipefail
+
+declare -r init_type='auto'
+declare -ri no_rebuild='0'
+
+add_user() {
+  : "${1:?'User was not defined'}"
+  declare -r user="$1"
+  declare -r uid="$2"
+
+  if [ -z "$uid" ]; then
+    declare -r uid_flags=""
+  else
+    declare -r uid_flags="--uid $uid"
+  fi
+
+  declare -r group="${3:-$user}"
+  declare -r descr="${4:-No description}"
+  declare -r shell="${5:-/bin/false}"
+
+  if ! getent passwd | grep -q "^$user:"; then
+    echo "Creating system user: $user in $group with $descr and shell $shell"
+    useradd $uid_flags --gid $group --no-create-home --system --shell $shell -c "$descr" $user
+  fi
+}
+
+add_group() {
+  : "${1:?'Group was not defined'}"
+  declare -r group="$1"
+  declare -r gid="$2"
+
+  if [ -z "$gid" ]; then
+    declare -r gid_flags=""
+  else
+    declare -r gid_flags="--gid $gid"
+  fi
+
+  if ! getent group | grep -q "^$group:" ; then
+    echo "Creating system group: $group"
+    groupadd $gid_flags --system $group
+  fi
+}
+
+start_service () {
+  : "${1:?'Service name was not defined'}"
+  declare -r service_name="$1"
+
+  if hash systemctl 2> /dev/null; then
+    if [[ "$init_type" == 'auto' || "$init_type" == 'systemd' ]]; then
+      {
+        systemctl enable "$service_name.service" && \
+        systemctl start "$service_name.service"
+      } || echo "$service_name could not be registered or started"
+    fi
+  elif hash service 2> /dev/null; then
+    if [[ "$init_type" == 'auto' || "$init_type" == 'upstart' || "$init_type" == 'sysv' ]]; then
+      service "$service_name" start || echo "$service_name could not be registered or started"
+    fi
+  elif hash start 2> /dev/null; then
+    if [[ "$init_type" == 'auto' || "$init_type" == 'upstart' ]]; then
+      start "$service_name" || echo "$service_name could not be registered or started"
+    fi
+  elif hash update-rc.d 2> /dev/null; then
+      if [[ "$init_type" == 'auto' || "$init_type" == 'sysv' ]]; then
+      {
+        update-rc.d "$service_name" defaults && \
+        "/etc/init.d/$service_name" start
+      } || echo "$service_name could not be registered or started"
+    fi
+  else
+    echo 'Your system does not appear to use systemd, Upstart, or System V, so the service could not be started'
+  fi
+}
+
+
+add_group 'audiobookshelf' ''
+add_user 'audiobookshelf' '' 'audiobookshelf' 'audiobookshelf user-daemon' '/bin/false'
+
+mkdir -p '/var/log/audiobookshelf'
+chown -R 'audiobookshelf:audiobookshelf' '/var/log/audiobookshelf'
+
+start_service 'audiobookshelf'