Added update script

scripts/upgrade

@@ -0,0 +1,90 @@
+#!/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 $port
+
+#=================================================
+# MODIFY A CONFIG FILE
+#=================================================
+
+### `ynh_replace_string` is used to replace a string in a file.
+### (It's compatible with sed regular expressions syntax)
+ynh_replace_string "__PORT__"       "$port"            "../conf/squid.conf"
+cp -f "../conf/squid.conf" "/etc/squid3/squid.conf"
+
+
+#=================================================
+# 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/squid3/squid.conf"
+# Recalculate and store the checksum of the file for the next upgrade.
+ynh_store_file_checksum "/etc/squid3/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/squid3/access.log"
+
+#=================================================
+# RESTART SQUID'S SERVICE and SSOWATCONF
+#=================================================
+
+service squid3 restart
+yunohost app ssowatconf
+