squid3_ynh/scripts/upgrade

#!/bin/bash

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

source _common.sh
source /usr/share/yunohost/helpers

#=================================================
# LOAD SETTINGS
#=================================================

app=$YNH_APP_INSTANCE_NAME
port=$(ynh_app_setting_get $app port)



#=================================================
# BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
#=================================================

# Backup the current version of the app
ynh_backup_before_upgrade
ynh_clean_setup () {
	# restore it if the upgrade fails
	ynh_restore_upgradebackup
}
# Exit if an error occurs during the execution of the script
ynh_abort_if_errors

#=================================================
# SPECIFIC RESTORATION
#=================================================
# REINSTALL DEPENDENCIES
#=================================================

ynh_install_app_dependencies squid3 mailutils

#=================================================
# SPECIFIC RESTORE
#=================================================
# OPEN PORTS
#=================================================

yunohost firewall allow --no-upnp TCP $port

#=================================================
# MODIFY A CONFIG FILE
#=================================================

### `ynh_replace_string` is used to replace a string in a file.
### (It's compatible with sed regular expressions syntax)

# See is squid3 folder is there
if [ -d "/etc/squid3" ]; then 
		squid="squid3"
		
# If squid3 folder is not found look for squid folder
elif [ -d "/etc/squid" ]; then
		squid="squid"

# If both folders are not found then call ynh_die
else
		ynh_die "No squid folder found in /etc. Looks like squid 3 package is not installed. Try installing it manually by apt-get install squid3"
  
fi

ynh_replace_string "__PORT__"    "$port"   "../conf/squid.conf"
ynh_replace_string "__SQUID__"   "$squid"   "../conf/squid.conf"
cp -f "../conf/squid.conf" "/etc/$squid/."
# Save squid folder
ynh_app_setting_set $app squid_folder $squid


#=================================================
# SPECIFIC UPGRADE
#=================================================

### Verify the checksum of a file, stored by `ynh_store_file_checksum` in the install script.
### And create a backup of this file if the checksum is different. So the file will be backed up if the admin had modified it.
ynh_backup_if_checksum_is_different "/etc/$squid/squid.conf"
# Recalculate and store the checksum of the file for the next upgrade.
ynh_store_file_checksum "/etc/$squid/squid.conf"

#=================================================
# ADVERTISE SERVICE IN ADMIN PANEL
#=================================================

### `yunohost service add` is a CLI yunohost command to add a service in the admin panel.
### You'll find the service in the 'services' section of YunoHost admin panel.
### This CLI command would be useless if the app does not have any services (systemd or sysvinit)
### If you're not using these lines:
###		- You can remove these files in conf/.
###		- Remove the section "REMOVE SERVICE FROM ADMIN PANEL" in the remove script
###		- As well as the section ADVERTISE SERVICE IN ADMIN PANEL" in the restore script

yunohost service add squid3 --log "/var/log/$squid/access.log"

#=================================================
# RESTART SQUID'S SERVICE and SSOWATCONF
#=================================================

service $squid restart
yunohost app ssowatconf