Yurdle_ynh/scripts/upgrade

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#!/bin/bash
#=================================================
# GENERIC START
#=================================================
# IMPORT GENERIC HELPERS
#=================================================
source _common.sh
source /usr/share/yunohost/helpers
# Settings are automatically loaded as bash variables
# in every app script context, therefore typically these will exist:
# - $domain
# - $path
# - $language
# - $install_dir
# - $port
# ...
# In the context of upgrade,
# - resources are automatically provisioned / updated / deleted (depending on existing resources)
# - a safety backup is automatically created by the core and will be restored if the upgrade fails
### This helper will compare the version of the currently installed app and the version of the upstream package.
### $upgrade_type can have 2 different values
### - UPGRADE_APP if the upstream app version has changed
### - UPGRADE_PACKAGE if only the YunoHost package has changed
### ynh_check_app_version_changed will stop the upgrade if the app is up to date.
### UPGRADE_APP should be used to upgrade the core app only if there's an upgrade to do.
upgrade_type=$(ynh_check_app_version_changed)
#=================================================
# STANDARD UPGRADE STEPS
#=================================================
# ENSURE DOWNWARD COMPATIBILITY
#=================================================
#ynh_script_progression --message="Ensuring downward compatibility..." --weight=1
#
# N.B. : the following setting migration snippets are provided as *EXAMPLES*
# of what you may want to do in some cases (e.g. a setting was not defined on
# some legacy installs and you therefore want to initiaze stuff during upgrade)
#
# If db_name doesn't exist, create it
#if [ -z "$db_name" ]; then
# db_name=$(ynh_sanitize_dbid --db_name=$app)
# ynh_app_setting_set --app=$app --key=db_name --value=$db_name
#fi
# If install_dir doesn't exist, create it
#if [ -z "$install_dir" ]; then
# install_dir=/var/www/$app
# ynh_app_setting_set --app=$app --key=install_dir --value=$install_dir
#fi
#=================================================
# STOP SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Stopping a systemd service..." --weight=1
ynh_systemd_action --service_name=$app --action="stop" --log_path="/var/log/$app/$app.log"
#=================================================
# "REBUILD" THE APP (DEPLOY NEW SOURCES, RERUN NPM BUILD...)
#=================================================
# DOWNLOAD, CHECK AND UNPACK SOURCE
#=================================================
if [ "$upgrade_type" == "UPGRADE_APP" ]
then
ynh_script_progression --message="Upgrading source files..." --weight=1
# Download, check integrity, uncompress and patch the source from manifest.toml
ynh_setup_source --dest_dir="$install_dir"
fi
# $install_dir will automatically be initialized with some decent
# permissions by default ... however, you may need to recursively reapply
# ownership to all files such as after the ynh_setup_source step
chown -R $app:www-data "$install_dir"
#=================================================
# REAPPLY SYSTEM CONFIGURATIONS
#=================================================
ynh_script_progression --message="Upgrading system configurations related to $app..." --weight=1
# This should be a literal copypaste of what happened in the install's "System configuration" section
ynh_add_fpm_config
ynh_add_nginx_config
ynh_add_systemd_config
yunohost service add $app --description="A short description of the app" --log="/var/log/$app/$app.log"
ynh_use_logrotate --non-append
ynh_add_fail2ban_config --logpath="/var/log/nginx/${domain}-error.log" --failregex="Regex to match into the log for a failed login"
#=================================================
# RECONFIGURE THE APP (UPDATE CONF, APPLY MIGRATIONS...)
#=================================================
# UPDATE A CONFIG FILE
#=================================================
ynh_script_progression --message="Updating a configuration file..." --weight=1
### Same as during install
###
### The file will automatically be backed-up if it's found to be manually modified (because
### ynh_add_config keeps track of the file's checksum)
ynh_add_config --template="some_config_file" --destination="$install_dir/some_config_file"
# FIXME: this should be handled by the core in the future
# You may need to use chmod 600 instead of 400,
# for example if the app is expected to be able to modify its own config
chmod 400 "$install_dir/some_config_file"
chown $app:$app "$install_dir/some_config_file"
### For more complex cases where you want to replace stuff using regexes,
### you shoud rely on ynh_replace_string (which is basically a wrapper for sed)
### When doing so, you also need to manually call ynh_store_file_checksum
###
### ynh_replace_string --match_string="match_string" --replace_string="replace_string" --target_file="$install_dir/some_config_file"
### ynh_store_file_checksum --file="$install_dir/some_config_file"
#=================================================
# START SYSTEMD SERVICE
#=================================================
ynh_script_progression --message="Starting a systemd service..." --weight=1
ynh_systemd_action --service_name=$app --action="start" --log_path="/var/log/$app/$app.log"
#=================================================
# END OF SCRIPT
#=================================================
ynh_script_progression --message="Upgrade of $app completed" --last