discourse_ynh/scripts/restore

#!/bin/bash

#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================

#Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
source ../settings/scripts/_common.sh
source /usr/share/yunohost/helpers

#=================================================
# MANAGE SCRIPT FAILURE
#=================================================
ynh_print_info --message="Managing script failure..."

ynh_clean_setup () {
	# Clean remainings not handled by remove script
	ynh_clean_check_starting
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# LOAD SETTINGS
#=================================================
ynh_print_info --message="Loading settings..."

app=$YNH_APP_INSTANCE_NAME

domain=$(ynh_app_setting_get --app=$app --key=domain)
path_url=$(ynh_app_setting_get --app=$app --key=path)
final_path=$(ynh_app_setting_get --app=$app --key=final_path)
db_name=$(ynh_app_setting_get --app=$app --key=db_name)
db_user=$db_name

#=================================================
# CHECK IF THE APP CAN BE RESTORED
#=================================================
ynh_print_info --message="Validating restoration parameters..."

ynh_webpath_available --domain=$domain --path_url=$path_url \
	|| ynh_die --message="Path not available: ${domain}${path_url}"
test ! -d $final_path \
	|| ynh_die --message="There is already a directory: $final_path "

# Check memory requirements
check_memory_requirements

#=================================================
# STANDARD RESTORATION STEPS
#=================================================
# RESTORE THE NGINX CONFIGURATION
#=================================================
ynh_print_info --message="Restoring the nginx configuration..."

ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"

#=================================================
# RESTORE THE APP MAIN DIR
#=================================================
ynh_print_info --message="Restoring the app main directory..."

ynh_restore_file --origin_path="$final_path"

#=================================================
# RECREATE THE DEDICATED USER
#=================================================
ynh_print_info --message="Recreating the dedicated system user..."

# Create the dedicated user (if not existing)
ynh_system_user_create --username=$app --home_dir=$final_path --use_shell

#=================================================
# RESTORE USER RIGHTS
#=================================================
ynh_print_info --message="Restoring user rights..."

# Restore permissions on app files
chown -R $app: $final_path

#=================================================
# SPECIFIC RESTORATION
#=================================================
# REINSTALL DEPENDENCIES
#=================================================
ynh_print_info --message="Reinstalling dependencies..."

# Define and install dependencies
ynh_install_app_dependencies $pkg_dependencies

#=================================================
# INSTALL RUBY
#=================================================
ynh_print_info --message="Install Ruby..."

ynh_install_ruby --ruby_version=$RUBY_VERSION

#=================================================
# REINSTALL BUNDLE GEM
#=================================================
ynh_print_info --message="R<>install Bundle Gem..."

(cd "$final_path"
gem install bundler)

#=================================================
# RESTORE THE POSTGRESQL DATABASE
#=================================================
ynh_print_info --message="Restoring the PostgreSQL database..."

db_pwd=$(ynh_app_setting_get --app=$app --key=db_pwd)
ynh_psql_test_if_first_run
ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
# Set extensions
ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS hstore;" --database=$db_name
ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name
# Restore dump
ynh_psql_execute_file_as_root --file="./db.sql" --database="$db_name"

#=================================================
# RESTORE SYSTEMD
#=================================================
ynh_print_info --message="Restoring the systemd configuration..."

systemctl daemon-reload
systemctl enable $app.service

#=================================================
# INTEGRATE SERVICE IN YUNOHOST
#=================================================
ynh_print_info --message="Integrating service in YunoHost..."

yunohost service add $app --log "$final_path/log/unicorn.stderr.log" "$final_path/log/unicorn.stdout.log" "$final_path/log/production.log"

#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_print_info --message="Starting a systemd service..."

if [ -n "$(uname -m | grep arm)" ] ; then
	unicorn_workers=2
else
	unicorn_workers=3
fi
ynh_systemd_action --service_name=$app --action="start" --log_path="$final_path/log/unicorn.stderr.log" --line_match="INFO -- : worker=$((unicorn_workers-1)) ready"

#=================================================
# GENERIC FINALIZATION
#=================================================
# RELOAD NGINX
#=================================================
ynh_print_info --message="Reloading nginx web server..."

ynh_systemd_action --service_name=nginx --action=reload

#=================================================
# END OF SCRIPT
#=================================================

ynh_print_info --message="Restoration completed for $app"