diff --git a/manifest.json b/manifest.json
index 53db638..bd459ff 100644
--- a/manifest.json
+++ b/manifest.json
@@ -19,7 +19,7 @@
         }
     ],
     "requirements": {
-        "yunohost": ">= 3.4"
+        "yunohost": ">= 3.5"
     },
     "multi_instance": true,
     "services": [
diff --git a/scripts/_common.sh b/scripts/_common.sh
index a1f9ec6..61cb799 100644
--- a/scripts/_common.sh
+++ b/scripts/_common.sh
@@ -18,60 +18,3 @@ pkg_dependencies="postgresql postgresql-contrib openssl g++ redis-server redis-t
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================
-
-# Send an email to inform the administrator
-#
-# usage: ynh_send_readme_to_admin app_message [recipients]
-# | arg: app_message - The message to send to the administrator.
-# | arg: recipients - The recipients of this email. Use spaces to separate multiples recipients. - default: root
-#	example: "root admin@domain"
-#	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
-#	example: "root admin@domain user1 user2"
-ynh_send_readme_to_admin() {
-	local app_message="${1:-...No specific information...}"
-	local recipients="${2:-root}"
-
-	# Retrieve the email of users
-	find_mails () {
-		local list_mails="$1"
-		local mail
-		local recipients=" "
-		# Read each mail in argument
-		for mail in $list_mails
-		do
-			# Keep root or a real email address as it is
-			if [ "$mail" = "root" ] || echo "$mail" | grep --quiet "@"
-			then
-				recipients="$recipients $mail"
-			else
-				# But replace an user name without a domain after by its email
-				if mail=$(ynh_user_get_info "$mail" "mail" 2> /dev/null)
-				then
-					recipients="$recipients $mail"
-				fi
-			fi
-		done
-		echo "$recipients"
-	}
-	recipients=$(find_mails "$recipients")
-
-	local mail_subject="☁️🆈🅽🅷☁️: \`$app\` has important message for you"
-
-	local mail_message="This is an automated message from your beloved YunoHost server.
-Specific information for the application $app.
-$app_message
----
-Automatic diagnosis data from YunoHost
-$(yunohost tools diagnosis | grep -B 100 "services:" | sed '/services:/d')"
-	
-	# Define binary to use for mail command
-	if [ -e /usr/bin/bsd-mailx ]
-	then
-		local mail_bin=/usr/bin/bsd-mailx
-	else
-		local mail_bin=/usr/bin/mail.mailutils
-	fi
-
-	# Send the email to the recipients
-	echo "$mail_message" | $mail_bin -a "Content-Type: text/plain; charset=UTF-8" -s "$mail_subject" "$recipients"
-}
diff --git a/scripts/backup b/scripts/backup
index a384c49..48d6c9c 100644
--- a/scripts/backup
+++ b/scripts/backup
@@ -8,7 +8,6 @@
 
 #Keep this path for calling _common.sh inside the execution's context of backup and restore scripts
 source ../settings/scripts/_common.sh
-source ../settings/scripts/ynh_systemd_action
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -24,69 +23,69 @@ ynh_abort_if_errors
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_print_info "Loading installation settings..."
+ynh_print_info --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-final_path=$(ynh_app_setting_get "$app" final_path)
-domain=$(ynh_app_setting_get "$app" domain)
-db_name=$(ynh_app_setting_get "$app" psql_db)
-
-#=================================================
-# STOP PEERTUBE FOR BACKUP
-#=================================================
-ynh_print_info "Stop $app service..."
-
-ynh_systemd_action --service_name="$app" --action="stop"
+final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+db_name=$(ynh_app_setting_get --app=$app --key=psql_db)
 
 #=================================================
 # STANDARD BACKUP STEPS
+#=================================================
+# STOP SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Stopping a systemd service..."
+
+ynh_systemd_action --service_name=$app --action="stop"
+
 #=================================================
 # BACKUP THE APP MAIN DIR
 #=================================================
-ynh_print_info "Backing up the main app directory..."
+ynh_print_info --message="Backing up the main app directory..."
 
-ynh_backup "$final_path"
+ynh_backup --src_path="$final_path"
 
 #=================================================
 # BACKUP THE NGINX CONFIGURATION
 #=================================================
-ynh_print_info "Backing up nginx web server configuration..."
+ynh_print_info --message="Backing up nginx web server configuration..."
 
-ynh_backup "/etc/nginx/conf.d/$domain.d/$app.conf"
+ynh_backup --src_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
 #=================================================
 # BACKUP THE POSTGRESQL DATABASE
 #=================================================
-ynh_print_info "Backing up the PostgreSQL database..."
+ynh_print_info --message="Backing up the PostgreSQL database..."
 
-ynh_psql_dump_db "$db_name" > db.sql
+ynh_psql_dump_db --database="$db_name" > db.sql
 
 #=================================================
 # SPECIFIC BACKUP
 #=================================================
 # BACKUP LOGROTATE
 #=================================================
-ynh_print_info "Backing up logrotate configuration..."
+ynh_print_info --message="Backing up logrotate configuration..."
 
-ynh_backup "/etc/logrotate.d/$app"
+ynh_backup --src_path="/etc/logrotate.d/$app"
 
 #=================================================
 # BACKUP SYSTEMD
 #=================================================
-ynh_print_info "Backing up systemd configuration..."
+ynh_print_info --message="Backing up systemd configuration..."
 
-ynh_backup "/etc/systemd/system/$app.service"
+ynh_backup --src_path="/etc/systemd/system/$app.service"
 
 #=================================================
-# START PEERTUBE
+# START SYSTEMD SERVICE
 #=================================================
-ynh_print_info "Start $app service..."
+ynh_print_info --message="Starting a systemd service..."
 
-ynh_systemd_action --service_name="$app" --action="start" --log_path="systemd" --line_match="Server listening on localhost"
+ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Server listening on localhost"
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_print_info "Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."
+ynh_print_info --message="Backup script completed for $app. (YunoHost will then actually copy those files to the archive)."
diff --git a/scripts/install b/scripts/install
index 97961c2..1ddc5bb 100644
--- a/scripts/install
+++ b/scripts/install
@@ -8,7 +8,7 @@
 
 source _common.sh
 source ynh_add_extra_apt_repos__3
-source ynh_systemd_action
+source ynh_send_readme_to_admin__2
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -16,7 +16,6 @@ source /usr/share/yunohost/helpers
 #=================================================
 
 ynh_clean_setup () {
-	read-p "key"
 	ynh_clean_check_starting
 }
 # Exit if an error occurs during the execution of the script
@@ -29,7 +28,7 @@ ynh_abort_if_errors
 domain=$YNH_APP_ARG_DOMAIN
 path_url="/"
 admin_email=$YNH_APP_ARG_EMAIL
-admin_pass=$(ynh_string_random 24)
+admin_pass=$(ynh_string_random --length=24)
 is_public=$YNH_APP_ARG_IS_PUBLIC
 
 app=$YNH_APP_INSTANCE_NAME
@@ -37,42 +36,42 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 # CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
 #=================================================
-ynh_print_info "Validating installation parameters..."
+ynh_print_info --message="Validating installation parameters..."
 
 final_path=/var/www/$app
-test ! -e "$final_path" || ynh_die "This path already contains a folder"
+test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
 
 # Register (book) web path
-ynh_webpath_register "$app" "$domain" "$path_url"
+ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url
 
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================
-ynh_print_info "Storing installation settings..."
+ynh_print_info --message="Storing installation settings..."
 
-ynh_app_setting_set "$app" domain      "$domain"
-ynh_app_setting_set "$app" admin_email "$admin_email"
-ynh_app_setting_set "$app" admin_pass  "$admin_pass"
-ynh_app_setting_set "$app" is_public   "$is_public"
+ynh_app_setting_set --app=$app --key=domain --value=$domain
+ynh_app_setting_set --app=$app --key=admin_email --value=$admin_email
+ynh_app_setting_set --app=$app --key=admin_pass --value=$admin_pass
+ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 
 #=================================================
 # STANDARD MODIFICATIONS
 #=================================================
 # FIND AND OPEN A PORT
 #=================================================
-ynh_print_info "Configuring firewall..."
+ynh_print_info --message="Configuring firewall..."
 
 # Find a free port
-port=$(ynh_find_port 9000)
-ynh_app_setting_set "$app" port "$port"
+port=$(ynh_find_port --port=9000)
+ynh_app_setting_set --app=$app --key=port --value=$port
 
 #=================================================
 # INSTALL DEPENDENCIES
 #=================================================
-ynh_print_info "Installing dependencies..."
+ynh_print_info --message="Installing dependencies..."
 
 # Install nodejs
-ynh_install_nodejs 8
+ynh_install_nodejs --nodejs_version=8
 
 # Install dependencies
 ynh_install_app_dependencies $pkg_dependencies
@@ -90,32 +89,32 @@ ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ st
 #=================================================
 # CREATE A POSTGRESQL DATABASE
 #=================================================
-ynh_print_info "Creating a PostgreSQL database..."
+ynh_print_info --message="Creating a PostgreSQL database..."
 
 db_name="peertube_${app}"
-db_pwd=$(ynh_string_random 30)
-ynh_app_setting_set "$app" psql_db "$db_name"
-ynh_app_setting_set "$app" psqlpwd "$db_pwd"
+db_user=$app
+db_pwd=$(ynh_string_random --length=30)
+ynh_app_setting_set --app="$app" --key=psql_db --value="$db_name"
+ynh_app_setting_set --app="$app" --key=psqlpwd --value="$db_pwd"
 ynh_psql_test_if_first_run
-ynh_psql_create_user "$app" "$db_pwd"
-ynh_psql_execute_as_root \
-"CREATE DATABASE $db_name ENCODING 'UTF8' LC_COLLATE='C' LC_CTYPE='C' template=template0 OWNER $app;"
-ynh_psql_execute_as_root "\connect $db_name 
-CREATE EXTENSION IF NOT EXISTS unaccent;CREATE EXTENSION IF NOT EXISTS pg_trgm;"
+ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
+
+ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS unaccent;" --database=$db_name
+ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name
 
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
-ynh_print_info "Setting up source files..."
+ynh_print_info --message="Setting up source files..."
 
-ynh_app_setting_set $app final_path $final_path
+ynh_app_setting_set --app=$app --key=final_path --value=$final_path
 # Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source "$final_path"
+ynh_setup_source --dest_dir="$final_path"
 
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
-ynh_print_info "Configuring nginx web server..."
+ynh_print_info --message="Configuring nginx web server..."
 
 # Create a dedicated nginx config
 ynh_add_nginx_config
@@ -123,17 +122,17 @@ ynh_add_nginx_config
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
-ynh_print_info "Configuring system user..."
+ynh_print_info --message="Configuring system user..."
 
 # Create a system user
-ynh_system_user_create "$app"
+ynh_system_user_create --username=$app
 
 #=================================================
 # SPECIFIC SETUP
 #=================================================
 # CREATE THE DATA DIRECTORY
 #=================================================
-ynh_print_info "Create the data directory..."
+ynh_print_info --message="Create the data directory..."
 
 # Define app's data directory
 datadir="/home/yunohost.app/${app}/storage"
@@ -149,12 +148,12 @@ chown -R "$app":"$app" "$datadir"
 #=================================================
 
 cp ../conf/production.yaml "$final_path/config/production.yaml"
-ynh_replace_string "__domain__"  "$domain"      "$final_path/config/production.yaml"
-ynh_replace_string "__db_name__" "$app"         "$final_path/config/production.yaml"
-ynh_replace_string "__app__"     "$app"         "$final_path/config/production.yaml"
-ynh_replace_string "__db_pwd__"  "$db_pwd"      "$final_path/config/production.yaml"
-ynh_replace_string "__email__"   "$admin_email" "$final_path/config/production.yaml"
-ynh_replace_string "__PORT__"    "$port"        "$final_path/config/production.yaml"
+ynh_replace_string --match_string="__domain__" --replace_string="$domain" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__db_name__" --replace_string="$app" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__app__" --replace_string="$app" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__db_pwd__" --replace_string="$db_pwd" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__email__" --replace_string="$admin_email" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/production.yaml"
 
 #Create the admin settings file
 touch "$final_path/config/local-production.json"
@@ -164,8 +163,8 @@ touch "$final_path/config/local-production.json"
 #=================================================
 
 # Calculate and store the config file checksum into the app settings
-ynh_store_file_checksum "$final_path/config/production.yaml"
-ynh_store_file_checksum "$final_path/config/local-production.json"
+ynh_store_file_checksum --file="$final_path/config/production.yaml"
+ynh_store_file_checksum --file="$final_path/config/local-production.json"
 
 #=================================================
 # BUILD YARN DEPENDENCIES
@@ -179,7 +178,7 @@ popd
 # SETUP SYSTEMD
 #=================================================
 
-ynh_replace_string "__ENV_PATH__" "$PATH" "../conf/systemd.service"
+ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$PATH" --target_file="../conf/systemd.service"
 # Create a dedicated systemd config
 ynh_add_systemd_config
 
@@ -195,10 +194,10 @@ chown -R "$app":"$app" $final_path
 #=================================================
 # SETUP LOGROTATE
 #=================================================
-ynh_print_info "Configuring log rotation..."
+ynh_print_info --message="Configuring log rotation..."
 
 # Use logrotate to manage application logfile(s)
-ynh_use_logrotate "/home/yunohost.app/${app}/storage/logs/peertube.log"
+ynh_use_logrotate --logfile="/home/yunohost.app/${app}/storage/logs/peertube.log"
 
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
@@ -207,31 +206,31 @@ ynh_use_logrotate "/home/yunohost.app/${app}/storage/logs/peertube.log"
 # if using yunohost version 3.2 or more in the 'manifest.json', a description can be added
 yunohost service add $app --description "$app daemon for Peertube" --log "/home/yunohost.app/${app}/storage/logs/peertube.log"
 
+#=================================================
+# START SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Starting a systemd service..."
+
+ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Server listening on localhost"
+
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_print_info "Configuring SSOwat..."
+ynh_print_info --message="Configuring SSOwat..."
 
 # Make app public if necessary
 if [ $is_public -eq 1 ]
 then
 	# unprotected_uris allows SSO credentials to be passed anyway.
-	ynh_app_setting_set $app unprotected_uris "/"
+	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
 fi
 
 #=================================================
 # RELOAD NGINX
 #=================================================
-ynh_print_info "Reloading nginx web server..."
+ynh_print_info --message="Reloading nginx web server..."
 
-systemctl reload nginx
-
-#=================================================
-# START SERVICE
-#=================================================
-ynh_print_info "Start $app service..."
-
-ynh_systemd_action --service_name="$app" --action="start" --log_path="systemd" --line_match="Server listening on localhost"
+ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
 # CHANGE PEERTUBE ADMIN PASSWORD AFTER INITIAL GEN
@@ -255,10 +254,10 @@ The admin password is: $admin_pass
 
 If you are facing any problem or want to improve this app, please open a new issue here: https://github.com/YunoHost-Apps/peertube_ynh"
 
-ynh_send_readme_to_admin "$message"
+ynh_send_readme_to_admin --app_message="$message"
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_print_info "Installation of $app completed"
+ynh_print_info --message="Installation of $app completed"
diff --git a/scripts/remove b/scripts/remove
index 58c798d..873f08d 100644
--- a/scripts/remove
+++ b/scripts/remove
@@ -7,19 +7,21 @@
 #=================================================
 
 source _common.sh
+source ynh_send_readme_to_admin__2
 source /usr/share/yunohost/helpers
 
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_print_info "Loading installation settings..."
+ynh_print_info --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get "$app" domain)
-port=$(ynh_app_setting_get "$app" port)
-db_name=$(ynh_app_setting_get "$app" psql_db)
-final_path=$(ynh_app_setting_get "$app" final_path)
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+port=$(ynh_app_setting_get --app=$app --key=port)
+db_name=$(ynh_app_setting_get --app=$app --key=psql_db)
+db_user=$app
+final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 
 #=================================================
 # STANDARD REMOVE
@@ -28,16 +30,16 @@ final_path=$(ynh_app_setting_get "$app" final_path)
 #=================================================
 
 # Remove a service from the admin panel, added by `yunohost service add`
-if yunohost service status $app >/dev/null 2>&1
+if ynh_exec_warn_less yunohost service status $app >/dev/null 2>&1
 then
-	ynh_print_info "Removing $app service"
-	yunohost service remove "$app"
+	ynh_print_info --message="Removing $app service..."
+	yunohost service remove $app
 fi
 
 #=================================================
 # STOP AND REMOVE SERVICE
 #=================================================
-ynh_print_info "Stopping and removing the systemd service"
+ynh_print_info --message="Stopping and removing the systemd service..."
 
 # Remove the dedicated systemd config
 ynh_remove_systemd_config
@@ -45,18 +47,15 @@ ynh_remove_systemd_config
 #=================================================
 # REMOVE THE POSTGRESQL DATABASE
 #=================================================
-ynh_print_info "Removing the PostgreSQL database"
-
-ynh_psql_execute_as_root "\connect $db_name 
-SELECT pg_terminate_backend (pg_stat_activity.pid) FROM pg_stat_activity WHERE pg_stat_activity.datname = '$db_name';"
+ynh_print_info --message="Removing the PostgreSQL database..."
 
 # Remove a database if it exists, along with the associated user
-ynh_psql_remove_db --db_name="$db_name" --db_user="$app"
+ynh_psql_remove_db --db_user=$db_user --db_name=$db_name
 
 #=================================================
 # REMOVE DEPENDENCIES
 #=================================================
-ynh_print_info "Removing dependencies"
+ynh_print_info --message="Removing dependencies..."
 
 # Remove metapackage and its dependencies
 ynh_remove_app_dependencies
@@ -65,15 +64,15 @@ ynh_remove_nodejs
 #=================================================
 # REMOVE APP MAIN DIR
 #=================================================
-ynh_print_info "Removing app main directory"
+ynh_print_info --message="Removing app main directory..."
 
 # Remove the app directory securely
-ynh_secure_remove "$final_path"
+ynh_secure_remove --file="$final_path"
 
 #=================================================
 # REMOVE NGINX CONFIGURATION
 #=================================================
-ynh_print_info "Removing nginx web server configuration"
+ynh_print_info --message="Removing nginx web server configuration..."
 
 # Remove the dedicated nginx config
 ynh_remove_nginx_config
@@ -81,7 +80,7 @@ ynh_remove_nginx_config
 #=================================================
 # REMOVE LOGROTATE CONFIGURATION
 #=================================================
-ynh_print_info "Removing logrotate configuration"
+ynh_print_info --message="Removing logrotate configuration..."
 
 # Remove the app-specific logrotate config
 ynh_remove_logrotate
@@ -92,7 +91,7 @@ ynh_remove_logrotate
 
 if yunohost firewall list | grep -q "\- $port$"
 then
-	ynh_print_info "Closing port $port"
+	ynh_print_info --message="Closing port $port..."
 	ynh_exec_warn_less yunohost firewall disallow TCP $port
 fi
 
@@ -105,10 +104,10 @@ fi
 #=================================================
 # REMOVE DEDICATED USER
 #=================================================
-ynh_print_info "Removing the dedicated system user"
+ynh_print_info --message="Removing the dedicated system user..."
 
 # Delete a system user
-ynh_system_user_delete "$app"
+ynh_system_user_delete --username=$app
 
 #=================================================
 # SEND A README FOR THE ADMIN
@@ -129,10 +128,10 @@ rm -R /home/yunohost.app/$app -f
 
 If you facing any problem or want to improve this app, please open a new issue here: https://github.com/YunoHost-Apps/peertube_ynh"
 
-ynh_send_readme_to_admin "$message"
+ynh_send_readme_to_admin --app_message="$message"
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_print_info "Removal of $app completed"
+ynh_print_info --message="Removal of $app completed"
diff --git a/scripts/restore b/scripts/restore
index 28cbb06..ec64956 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -8,7 +8,6 @@
 
 source ../settings/scripts/_common.sh
 source ../settings/scripts/ynh_add_extra_apt_repos__3
-source ../settings/scripts/ynh_systemd_action
 source /usr/share/yunohost/helpers
 
 #=================================================
@@ -24,26 +23,27 @@ ynh_abort_if_errors
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_print_info "Loading settings..."
+ynh_print_info --message="Loading settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get "$app" domain)
-path_url=$(ynh_app_setting_get $app path)
-final_path=$(ynh_app_setting_get "$app" final_path)
-port=$(ynh_app_setting_get "$app" port)
-db_name=$(ynh_app_setting_get "$app" psql_db)
-db_pwd=$(ynh_app_setting_get "$app" psqlpwd)
+domain=$(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=$app --key=final_path)
+port=$(ynh_app_setting_get --app=$app --key=port)
+db_name=$(ynh_app_setting_get --app=$app --key=psql_db)
+db_user=$app
+db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
 
 #=================================================
 # CHECK IF THE APP CAN BE RESTORED
 #=================================================
-ynh_print_info "Validating restoration parameters..."
+ynh_print_info --message="Validating restoration parameters..."
 
-ynh_webpath_available "$domain" "$path_url" \
-	|| ynh_die "Path not available: ${domain}${path_url}"
-test ! -d "$final_path" \
-	|| ynh_die "There is already a directory: $final_path "
+ynh_webpath_available --domain=$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 "
 
 #=================================================
 # STANDARD RESTORATION STEPS
@@ -51,22 +51,22 @@ test ! -d "$final_path" \
 # RESTORE THE NGINX CONFIGURATION
 #=================================================
 
-ynh_restore_file "/etc/nginx/conf.d/$domain.d/$app.conf"
+ynh_restore_file --origin_path="/etc/nginx/conf.d/$domain.d/$app.conf"
 
 #=================================================
 # RESTORE THE APP MAIN DIR
 #=================================================
-ynh_print_info "Restoring the app main directory..."
+ynh_print_info --message="Restoring the app main directory..."
 
-ynh_restore_file "$final_path"
+ynh_restore_file --origin_path="$final_path"
 
 #=================================================
 # RECREATE THE DEDICATED USER
 #=================================================
-ynh_print_info "Recreating the dedicated system user..."
+ynh_print_info --message="Recreating the dedicated system user..."
 
 # Create the dedicated user (if not existing)
-ynh_system_user_create "$app"
+ynh_system_user_create --username=$app
 
 #=================================================
 # RESTORE USER RIGHTS
@@ -83,10 +83,10 @@ chown -R "$app":"$app" "/home/yunohost.app/${app}/storage"
 #=================================================
 # REINSTALL DEPENDENCIES
 #=================================================
-ynh_print_info "Reinstalling dependencies..."
+ynh_print_info --message="Reinstalling dependencies..."
 
 # Install nodejs
-ynh_install_nodejs 8
+ynh_install_nodejs --nodejs_version=8
 
 # Install dependencies
 ynh_install_app_dependencies $pkg_dependencies
@@ -104,21 +104,19 @@ ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ st
 #=================================================
 # RESTORE THE POSTGRESQL DATABASE
 #=================================================
-ynh_print_info "Restoring the PostgreSQL database..."
+ynh_print_info --message="Restoring the PostgreSQL database..."
 
 ynh_psql_test_if_first_run
-ynh_psql_create_user "$app" "$db_pwd"
-ynh_psql_execute_as_root \
-"CREATE DATABASE $db_name ENCODING 'UTF8' LC_COLLATE='C' LC_CTYPE='C' template=template0 OWNER $app;"
-ynh_psql_execute_file_as_root ./db.sql "$db_name"
+ynh_psql_setup_db --db_user=$db_user --db_name=$db_name --db_pwd=$db_pwd
+ynh_psql_execute_file_as_root --file="./db.sql" --database=$db_name
 
 #=================================================
 # RESTORE SYSTEMD
 #=================================================
-ynh_print_info "Restoring the systemd configuration..."
+ynh_print_info --message="Restoring the systemd configuration..."
 
-ynh_restore_file "/etc/systemd/system/$app.service"
-systemctl enable "$app.service"
+ynh_restore_file --origin_path="/etc/systemd/system/$app.service"
+systemctl enable $app.service
 
 #=================================================
 # ADVERTISE SERVICE IN ADMIN PANEL
@@ -126,30 +124,30 @@ systemctl enable "$app.service"
 
 yunohost service add $app --description "$app daemon for Peertube" --log "/home/yunohost.app/${app}/storage/logs/peertube.log"
 
+#=================================================
+# START SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Starting a systemd service..."
+
+ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Server listening on localhost"
+
 #=================================================
 # RESTORE THE LOGROTATE CONFIGURATION
 #=================================================
 
-ynh_restore_file "/etc/logrotate.d/$app"
+ynh_restore_file --origin_path="/etc/logrotate.d/$app"
 
 #=================================================
 # GENERIC FINALIZATION
 #=================================================
 # RELOAD NGINX
 #=================================================
-ynh_print_info "Reloading nginx web server..."
+ynh_print_info --message="Reloading nginx web server..."
 
-systemctl reload nginx
-
-#=================================================
-# START SERVICE
-#=================================================
-ynh_print_info "Start $app service..."
-
-ynh_systemd_action --service_name="$app" --action="start" --log_path="systemd" --line_match="Server listening on localhost"
+ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_print_info "Restoration completed for $app"
+ynh_print_info --message="Restoration completed for $app"
diff --git a/scripts/upgrade b/scripts/upgrade
index 2ca0233..aef0c55 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -8,54 +8,68 @@
 
 source _common.sh
 source ynh_add_extra_apt_repos__3
-source ynh_systemd_action
 source /usr/share/yunohost/helpers
 
 #=================================================
 # LOAD SETTINGS
 #=================================================
-ynh_print_info "Loading installation settings..."
+ynh_print_info --message="Loading installation settings..."
 
 app=$YNH_APP_INSTANCE_NAME
 
-domain=$(ynh_app_setting_get "$app" domain)
-path_url=$(ynh_app_setting_get $app path)
-is_public=$(ynh_app_setting_get "$app" is_public)
-admin_email=$(ynh_app_setting_get "$app" admin_email)
-final_path=$(ynh_app_setting_get "$app" final_path)
-port=$(ynh_app_setting_get "$app" port)
-db_name=$(ynh_app_setting_get "$app" psql_db)
-db_pwd=$(ynh_app_setting_get "$app" psqlpwd)
+domain=$(ynh_app_setting_get --app=$app --key=domain)
+path_url=$(ynh_app_setting_get --app=$app --key=path)
+is_public=$(ynh_app_setting_get --app=$app --key=is_public)
+admin_email=$(ynh_app_setting_get --app=$app --key=admin_email)
+final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+port=$(ynh_app_setting_get --app=$app --key=port)
+db_name=$(ynh_app_setting_get --app=$app --key=psql_db)
+db_pwd=$(ynh_app_setting_get --app=$app --key=psqlpwd)
+
+#=================================================
+# CHECK VERSION
+#=================================================
+
+upgrade_type=$(ynh_check_app_version_changed)
 
 #=================================================
 # ENSURE DOWNWARD COMPATIBILITY
 #=================================================
-ynh_print_info "Ensuring downward compatibility..."
+ynh_print_info --message="Ensuring downward compatibility..."
 
 # Fix is_public as a boolean value
 if [ "$is_public" = "Yes" ]; then
-	ynh_app_setting_set "$app" is_public 1
+	ynh_app_setting_set --app=$app --key=is_public --value=1
 	is_public=1
 elif [ "$is_public" = "No" ]; then
-	ynh_app_setting_set "$app" is_public 0
+	ynh_app_setting_set --app=$app --key=is_public --value=0
 	is_public=0
 fi
 
 # Close a port
 if yunohost firewall list | grep -q "\- $port$"
 then
-	ynh_print_info "Closing port $port"
+	ynh_print_info --message="Closing port $port"
 	ynh_exec_warn_less yunohost firewall disallow TCP $port
 fi
 
-# Remove repository
-ynh_secure_remove /etc/apt/sources.list.d/jessie-backports.list
-ynh_secure_remove /etc/apt/sources.list.d/yarn.list
+# Add PostgreSQL extension for v1.0.0-beta.10.pre.1
+ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS unaccent;" --database=$db_name 
+ynh_psql_execute_as_root --sql="CREATE EXTENSION IF NOT EXISTS pg_trgm;" --database=$db_name 
 
+# Remove repository
+ynh_secure_remove --file="/etc/apt/sources.list.d/jessie-backports.list"
+ynh_secure_remove --file="/etc/apt/sources.list.d/yarn.list"
+
+# Define app's data directory
+datadir="/home/yunohost.app/${app}/storage"
+# Create app folders
+mkdir -p "$datadir"
+	
 #=================================================
 # BACKUP BEFORE UPGRADE THEN ACTIVE TRAP
 #=================================================
-ynh_print_info "Backing up the app before upgrading (may take a while)..."
+ynh_print_info --message="Backing up the app before upgrading (may take a while)..."
 
 # Backup the current version of the app
 ynh_backup_before_upgrade
@@ -67,74 +81,48 @@ ynh_clean_setup () {
 # Exit if an error occurs during the execution of the script
 ynh_abort_if_errors
 
-#=================================================
-# STOP PEERTUBE FOR UPGRADE
-#=================================================
-ynh_print_info "Stop $app service..."
-
-ynh_systemd_action --service_name="$app" --action="stop"
-
-#===================================================
-# Add PostgreSQL extension for v1.0.0-beta.10.pre.1
-#===================================================
-
-ynh_psql_execute_as_root "\connect $db_name 
-CREATE EXTENSION IF NOT EXISTS unaccent;CREATE EXTENSION IF NOT EXISTS pg_trgm;"
-
-#=================================================
-# REMOVE APP MAIN DIR
-#=================================================
-
-# Create a temporary directory
-tmpdir="$(mktemp -d)"
-# Backup the config file in the temp dir
-cp -a "$final_path/config/local-production.json" "$tmpdir/local-production.json"
-cp -a "$final_path/config/production.yaml" "$tmpdir/production.yaml"
-# Remove the app directory securely
-ynh_secure_remove "$final_path"
-
-# Define app's data directory
-datadir="/home/yunohost.app/${app}/storage"
-# Create app folders
-mkdir -p "$datadir"
-
 #=================================================
 # STANDARD UPGRADE STEPS
+#=================================================
+# STOP SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Stopping a systemd service..."
+
+ynh_systemd_action --service_name=$app --action="stop"
+
 #=================================================
 # DOWNLOAD, CHECK AND UNPACK SOURCE
 #=================================================
-ynh_print_info "Upgrading source files..."
 
-# Download, check integrity, uncompress and patch the source from app.src
-ynh_setup_source "$final_path"
-
-#=================================================
-# MODIFY A CONFIG FILE
-#=================================================
-
-#Copy the admin saved settings from tmp directory to final path
-cp -a  "$tmpdir/local-production.json" "$final_path/config/local-production.json"
-cp -a  "$tmpdir/production.yaml" "$final_path/config/production.yaml"
-
-ynh_backup_if_checksum_is_different "$final_path/config/local-production.json"
-ynh_backup_if_checksum_is_different "$final_path/config/production.yaml"
-
-cp ../conf/production.yaml "$final_path/config/production.yaml"
-ynh_replace_string "__domain__"  "$domain"      "$final_path/config/production.yaml"
-ynh_replace_string "__db_name__" "$app"         "$final_path/config/production.yaml"
-ynh_replace_string "__app__"     "$app"         "$final_path/config/production.yaml"
-ynh_replace_string "__db_pwd__"  "$db_pwd"      "$final_path/config/production.yaml"
-ynh_replace_string "__email__"   "$admin_email" "$final_path/config/production.yaml"
-ynh_replace_string "__PORT__"    "$port"        "$final_path/config/production.yaml"
-
-
-# Remove the tmp directory securely
-ynh_secure_remove "$tmpdir"
+if [ "$upgrade_type" == "UPGRADE_APP" ]
+then
+	ynh_print_info --message="Upgrading source files..."
+	
+	# Create a temporary directory
+	tmpdir="$(mktemp -d)"
+	
+	# Backup the config file in the temp dir
+	cp -a "$final_path/config/local-production.json" "$tmpdir/local-production.json"
+	cp -a "$final_path/config/production.yaml" "$tmpdir/production.yaml"
+	
+	# Remove the app directory securely
+	ynh_secure_remove --file="$final_path"
+	
+	# Download, check integrity, uncompress and patch the source from app.src
+	ynh_setup_source --dest_dir="$final_path"
+	
+	#Copy the admin saved settings from tmp directory to final path
+	cp -a  "$tmpdir/local-production.json" "$final_path/config/local-production.json"
+	cp -a  "$tmpdir/production.yaml" "$final_path/config/production.yaml"
+	
+	# Remove the tmp directory securely
+	ynh_secure_remove --file="$tmpdir"
+fi
 
 #=================================================
 # NGINX CONFIGURATION
 #=================================================
-ynh_print_info "Upgrading nginx web server configuration..."
+ynh_print_info --message="Upgrading nginx web server configuration..."
 
 # Create a dedicated nginx config
 ynh_add_nginx_config
@@ -142,10 +130,10 @@ ynh_add_nginx_config
 #=================================================
 # UPGRADE DEPENDENCIES
 #=================================================
-ynh_print_info "Upgrading dependencies..."
+ynh_print_info --message="Upgrading dependencies..."
 
 # Install nodejs
-ynh_install_nodejs 8
+ynh_install_nodejs --nodejs_version=8
 
 # Install dependencies
 ynh_install_app_dependencies $pkg_dependencies
@@ -163,13 +151,32 @@ ynh_install_extra_app_dependencies --repo="deb https://dl.yarnpkg.com/debian/ st
 #=================================================
 # CREATE DEDICATED USER
 #=================================================
-ynh_print_info "Making sure dedicated system user exists..."
+ynh_print_info --message="Making sure dedicated system user exists..."
 
 # Create a system user
 ynh_system_user_create "$app"
 
 #=================================================
 # SPECIFIC UPGRADE
+#=================================================
+# MODIFY A CONFIG FILE
+#=================================================
+
+ynh_backup_if_checksum_is_different --file="$final_path/config/local-production.json"
+ynh_backup_if_checksum_is_different --file="$final_path/config/production.yaml"
+
+cp ../conf/production.yaml "$final_path/config/production.yaml"
+ynh_replace_string --match_string="__domain__" --replace_string="$domain" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__db_name__" --replace_string="$app" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__app__" --replace_string="$app" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__db_pwd__" --replace_string="$db_pwd" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__email__" --replace_string="$admin_email" --target_file="$final_path/config/production.yaml"
+ynh_replace_string --match_string="__PORT__" --replace_string="$port" --target_file="$final_path/config/production.yaml"
+
+# Recalculate and store the checksum of the file for the next upgrade.
+ynh_store_file_checksum "$final_path/config/local-production.json"
+ynh_store_file_checksum "$final_path/config/production.yaml"
+
 #=================================================
 # BUILD YARN DEPENDENCIES
 #=================================================
@@ -178,14 +185,10 @@ pushd "$final_path"
 	yarn install --production --pure-lockfile 
 popd
 
-# Recalculate and store the checksum of the file for the next upgrade.
-ynh_store_file_checksum "$final_path/config/local-production.json"
-ynh_store_file_checksum "$final_path/config/production.yaml"
-
 #=================================================
 # SETUP LOGROTATE
 #=================================================
-ynh_print_info "Upgrading logrotate configuration..."
+ynh_print_info --message="Upgrading logrotate configuration..."
 
 # Use logrotate to manage app-specific logfile(s)
 ynh_use_logrotate --non-append
@@ -193,9 +196,9 @@ ynh_use_logrotate --non-append
 #=================================================
 # SETUP SYSTEMD
 #=================================================
-ynh_print_info "Upgrading systemd configuration..."
+ynh_print_info --message="Upgrading systemd configuration..."
 
-ynh_replace_string "__ENV_PATH__" "$PATH" "../conf/systemd.service"
+ynh_replace_string --match_string="__ENV_PATH__" --replace_string="$PATH" --target_file="../conf/systemd.service"
 # Create a dedicated systemd config
 ynh_add_systemd_config
 
@@ -212,31 +215,31 @@ chown -R "$app":"$app" "$datadir"
 #=================================================
 # SETUP SSOWAT
 #=================================================
-ynh_print_info "Upgrading SSOwat configuration..."
+ynh_print_info --message="Upgrading SSOwat configuration..."
 
 # Make app public if necessary
-if [ "$is_public" -eq 1 ]
+if [ $is_public -eq 1 ]
 then
 	# unprotected_uris allows SSO credentials to be passed anyway
-	ynh_app_setting_set "$app" unprotected_uris "/"
+	ynh_app_setting_set --app=$app --key=unprotected_uris --value="/"
 fi
 
+#=================================================
+# START SYSTEMD SERVICE
+#=================================================
+ynh_print_info --message="Start $app service..."
+
+ynh_systemd_action --service_name=$app --action="start" --log_path="systemd" --line_match="Server listening on localhost"
+
 #=================================================
 # RELOAD NGINX
 #=================================================
-ynh_print_info "Reloading nginx web server..."
+ynh_print_info --message="Reloading nginx web server..."
 
-systemctl reload nginx
-
-#=================================================
-# START SERVICE
-#=================================================
-ynh_print_info "Start $app service..."
-
-ynh_systemd_action --service_name="$app" --action="start" --log_path="systemd" --line_match="Server listening on localhost"
+ynh_systemd_action --service_name=nginx --action=reload
 
 #=================================================
 # END OF SCRIPT
 #=================================================
 
-ynh_print_info "Upgrade of $app completed"
+ynh_print_info --message="Upgrade of $app completed"
diff --git a/scripts/ynh_send_readme_to_admin__2 b/scripts/ynh_send_readme_to_admin__2
new file mode 100644
index 0000000..06cff8c
--- /dev/null
+++ b/scripts/ynh_send_readme_to_admin__2
@@ -0,0 +1,140 @@
+#!/bin/bash
+
+# Send an email to inform the administrator
+#
+# usage: ynh_send_readme_to_admin --app_message=app_message [--recipients=recipients] [--type=type]
+# | arg: -m --app_message= - The file with the content to send to the administrator.
+# | arg: -r, --recipients= - The recipients of this email. Use spaces to separate multiples recipients. - default: root
+#	example: "root admin@domain"
+#	If you give the name of a YunoHost user, ynh_send_readme_to_admin will find its email adress for you
+#	example: "root admin@domain user1 user2"
+# | arg: -t, --type= - Type of mail, could be 'backup', 'change_url', 'install', 'remove', 'restore', 'upgrade'
+ynh_send_readme_to_admin() {
+	# Declare an array to define the options of this helper.
+	declare -Ar args_array=( [m]=app_message= [r]=recipients= [t]=type= )
+	local app_message
+	local recipients
+	local type
+	# Manage arguments with getopts
+
+	ynh_handle_getopts_args "$@"
+	app_message="${app_message:-}"
+	recipients="${recipients:-root}"
+	type="${type:-install}"
+
+	# Get the value of admin_mail_html
+	admin_mail_html=$(ynh_app_setting_get $app admin_mail_html)
+	admin_mail_html="${admin_mail_html:-0}"
+
+	# Retrieve the email of users
+	find_mails () {
+		local list_mails="$1"
+		local mail
+		local recipients=" "
+		# Read each mail in argument
+		for mail in $list_mails
+		do
+			# Keep root or a real email address as it is
+			if [ "$mail" = "root" ] || echo "$mail" | grep --quiet "@"
+			then
+				recipients="$recipients $mail"
+			else
+				# But replace an user name without a domain after by its email
+				if mail=$(ynh_user_get_info "$mail" "mail" 2> /dev/null)
+				then
+					recipients="$recipients $mail"
+				fi
+			fi
+		done
+		echo "$recipients"
+	}
+	recipients=$(find_mails "$recipients")
+
+	# Subject base
+	local mail_subject="☁️🆈🅽🅷☁️: \`$app\`"
+
+	# Adapt the subject according to the type of mail required.
+	if [ "$type" = "backup" ]; then
+		mail_subject="$mail_subject has just been backup."
+	elif [ "$type" = "change_url" ]; then
+		mail_subject="$mail_subject has just been moved to a new URL!"
+	elif [ "$type" = "remove" ]; then
+		mail_subject="$mail_subject has just been removed!"
+	elif [ "$type" = "restore" ]; then
+		mail_subject="$mail_subject has just been restored!"
+	elif [ "$type" = "upgrade" ]; then
+		mail_subject="$mail_subject has just been upgraded!"
+	else	# install
+		mail_subject="$mail_subject has just been installed!"
+	fi
+
+	local mail_message="This is an automated message from your beloved YunoHost server.
+
+Specific information for the application $app.
+
+$(if [ -n "$app_message" ]
+then
+	cat "$app_message"
+else
+	echo "...No specific information..."
+fi)
+
+---
+Automatic diagnosis data from YunoHost
+
+__PRE_TAG1__$(yunohost tools diagnosis | grep -B 100 "services:" | sed '/services:/d')__PRE_TAG2__"
+
+	# Store the message into a file for further modifications.
+	echo "$mail_message" > mail_to_send
+
+	# If a html email is required. Apply html tags to the message.
+ 	if [ "$admin_mail_html" -eq 1 ]
+ 	then
+		# Insert 'br' tags at each ending of lines.
+		ynh_replace_string "$" "<br>" mail_to_send
+
+		# Insert starting HTML tags
+		sed --in-place '1s@^@<!DOCTYPE html>\n<html>\n<head></head>\n<body>\n@' mail_to_send
+
+		# Keep tabulations
+		ynh_replace_string "  " "\&#160;\&#160;" mail_to_send
+		ynh_replace_string "\t" "\&#160;\&#160;" mail_to_send
+
+		# Insert url links tags
+		ynh_replace_string "__URL_TAG1__\(.*\)__URL_TAG2__\(.*\)__URL_TAG3__" "<a href=\"\2\">\1</a>" mail_to_send
+
+		# Insert pre tags
+		ynh_replace_string "__PRE_TAG1__" "<pre>" mail_to_send
+		ynh_replace_string "__PRE_TAG2__" "<\pre>" mail_to_send
+
+		# Insert finishing HTML tags
+		echo -e "\n</body>\n</html>" >> mail_to_send
+
+	# Otherwise, remove tags to keep a plain text.
+	else
+		# Remove URL tags
+		ynh_replace_string "__URL_TAG[1,3]__" "" mail_to_send
+		ynh_replace_string "__URL_TAG2__" ": " mail_to_send
+
+		# Remove PRE tags
+		ynh_replace_string "__PRE_TAG[1-2]__" "" mail_to_send
+	fi
+
+	# Define binary to use for mail command
+	if [ -e /usr/bin/bsd-mailx ]
+	then
+		local mail_bin=/usr/bin/bsd-mailx
+	else
+		local mail_bin=/usr/bin/mail.mailutils
+	fi
+
+	if [ "$admin_mail_html" -eq 1 ]
+	then
+		content_type="text/html"
+	else
+		content_type="text/plain"
+	fi
+
+	# Send the email to the recipients
+	cat mail_to_send | $mail_bin -a "Content-Type: $content_type; charset=UTF-8" -s "$mail_subject" "$recipients"
+}
diff --git a/scripts/ynh_systemd_action b/scripts/ynh_systemd_action
deleted file mode 100644
index 6bed6be..0000000
--- a/scripts/ynh_systemd_action
+++ /dev/null
@@ -1,89 +0,0 @@
-#!/bin/bash
-
-# Start (or other actions) a service,  print a log in case of failure and optionnaly wait until the service is completely started
-#
-# usage: ynh_systemd_action [-n service_name] [-a action] [ [-l "line to match"] [-p log_path] [-t timeout] [-e length] ]
-# | arg: -n, --service_name= - Name of the service to reload. Default : $app
-# | arg: -a, --action=       - Action to perform with systemctl. Default: start
-# | arg: -l, --line_match=   - Line to match - The line to find in the log to attest the service have finished to boot.
-#                              If not defined it don't wait until the service is completely started.
-# | arg: -p, --log_path=     - Log file - Path to the log file. Default : /var/log/$app/$app.log
-# | arg: -t, --timeout=      - Timeout - The maximum time to wait before ending the watching. Default : 300 seconds.
-# | arg: -e, --length=       - Length of the error log : Default : 20
-ynh_systemd_action() {
-    # Declare an array to define the options of this helper.
-    declare -Ar args_array=( [n]=service_name= [a]=action= [l]=line_match= [p]=log_path= [t]=timeout= [e]=length= )
-    local service_name
-    local action
-    local line_match
-    local length
-    local log_path
-    local timeout
-
-    # Manage arguments with getopts
-    ynh_handle_getopts_args "$@"
-
-    local service_name="${service_name:-$app}"
-    local action=${action:-start}
-    local log_path="${log_path:-/var/log/$service_name/$service_name.log}"
-    local length=${length:-20}
-    local timeout=${timeout:-300}
-
-    # Start to read the log
-    if [[ -n "${line_match:-}" ]]
-    then
-        local templog="$(mktemp)"
-	# Following the starting of the app in its log
-	if [ "$log_path" == "systemd" ] ; then
-            # Read the systemd journal
-            journalctl -u $service_name -f --since=-45 > "$templog" &
-	else
-            # Read the specified log file
-            tail -F -n0 "$log_path" > "$templog" &
-	fi
-        # Get the PID of the tail command
-        local pid_tail=$!
-    fi
-
-    echo "${action^} the service $service_name" >&2
-    systemctl $action $service_name \
-        || ( journalctl --lines=$length -u $service_name >&2 \
-        ; test -n "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2 \
-        ; false )
-
-    # Start the timeout and try to find line_match
-    if [[ -n "${line_match:-}" ]]
-    then
-        local i=0
-        for i in $(seq 1 $timeout)
-        do
-            # Read the log until the sentence is found, that means the app finished to start. Or run until the timeout
-            if grep --quiet "$line_match" "$templog"
-            then
-                echo "The service $service_name has correctly started." >&2
-                break
-            fi
-            echo -n "." >&2
-            sleep 1
-        done
-        if [ $i -eq $timeout ]
-        then
-            echo "The service $service_name didn't fully started before the timeout." >&2
-            journalctl --lines=$length -u $service_name >&2
-            test -n "$log_path" && echo "--" && tail --lines=$length "$log_path" >&2
-        fi
-
-        echo ""
-        ynh_clean_check_starting
-    fi
-}
-
-# Clean temporary process and file used by ynh_check_starting
-# (usually used in ynh_clean_setup scripts)
-#
-# usage: ynh_clean_check_starting
-ynh_clean_check_starting () {
-	# Stop the execution of tail.
-	kill -s 15 $pid_tail 2>&1
-	ynh_secure_remove "$templog" 2>&1
-}