diff --git a/conf/app.src b/conf/app.src
new file mode 100644
index 0000000..fc88007
--- /dev/null
+++ b/conf/app.src
@@ -0,0 +1,6 @@
+SOURCE_URL=https://launchpad.net/webtrees/1.7/1.7.9/+download/webtrees-1.7.9.zip
+SOURCE_SUM=0f51ab5af9414b981ade19b582a7dd06
+SOURCE_SUM_PRG=md5sum
+SOURCE_FORMAT=zip
+SOURCE_IN_SUBDIR=true
+SOURCE_FILENAME=
diff --git a/conf/nginx.conf b/conf/nginx.conf
index 160240c..7472207 100644
--- a/conf/nginx.conf
+++ b/conf/nginx.conf
@@ -1,7 +1,7 @@
-location YNH_WWW_PATH {
+location __PATH__ {
 
   # Path to source
-  alias YNH_WWW_ALIAS ;
+  alias __FINALPATH__/ ;
 
   # Example PHP configuration (remove if not used)
   index index.php;
diff --git a/scripts/.fonctions b/scripts/.fonctions
deleted file mode 100644
index 39b2c90..0000000
--- a/scripts/.fonctions
+++ /dev/null
@@ -1,180 +0,0 @@
-#!/bin/bash
-
-ynh_version="2.4"
-
-YNH_VERSION () {	# Display number version of the YunoHost moulinette
-	ynh_version=$(sudo yunohost -v | grep "moulinette:" | cut -d' ' -f2 | cut -d'.' -f1,2)
-}
-
-CHECK_VAR () {	# Check variable is not empty
-# $1 = Checking variable
-# $2 = Text to display on error
-	test -n "$1" || (echo "$2" >&2 && false)
-}
-
-EXIT_PROPERLY () {	# Causes the script to stop in the event of an error. And clean the residue.
-	trap '' ERR
-	echo -e "\e[91m \e[1m"	# Shell in light red bold
-	echo -e "!!\n  $app install's script has encountered an error. Installation was cancelled.\n!!" >&2
-
-	if type -t CLEAN_SETUP > /dev/null; then	# Checks the existence of the function before executing it.
-		CLEAN_SETUP	# Call the specific cleanup function of the install script.
-	fi
-
-	sudo sed -i "\@\"$domain$path/\":@d" /etc/ssowat/conf.json
-
-	if [ "$ynh_version" = "2.2" ]; then
-		/bin/bash $script_dir/remove	# Call the remove script. In 2.2, this behavior is not automatic.
-	fi
-
-	ynh_die
-}
-
-TRAP_ON () {	# Activate signal capture
-	trap EXIT_PROPERLY ERR	# Capturing exit signals on error
-}
-
-TRAP_OFF () {	# Ignoring signal capture until TRAP_ON
-	trap '' ERR	# Ignoring exit signals
-}
-
-CHECK_USER () {	# Check the validity of the user admin
-	# $1 = User admin variable
-	ynh_user_exists "$1" || (echo "Wrong admin" >&2 && false)
-}
-
-CHECK_PATH () {	# Checks / at the beginning of the path. And his absence at the end.
-	if [ "${path:0:1}" != "/" ]; then    # If the first character is not /
-		path="/$path"    # Add / at the beginning of path
-	fi
-	if [ "${path:${#path}-1}" == "/" ] && [ ${#path} -gt 1 ]; then    # If the last character is a / and it is not the only character.
-		path="${path:0:${#path}-1}"	# Delete last character
-	fi
-}
-
-CHECK_DOMAINPATH () {	# Checks the availability of the path and domain.
-	sudo yunohost app checkurl $domain$path -a $app
-}
-
-CHECK_FINALPATH () {	# Checks that the destination folder is not already in use.
-	final_path=/var/www/$app
-	if [ -e "$final_path" ]
-	then
-		echo "This path already contains a folder" >&2
-		false
-	fi
-}
-
-SETUP_SOURCE () {	# Download source, decompress and copu into $final_path
-	src=$(cat ../sources/source_md5 | awk -F' ' {'print $2'})
-	sudo wget -nv -i ../sources/source_url -O $src
-	# Checks the checksum of the downloaded source.
-	# md5sum -c ../sources/source_md5 --status || ynh_die "Corrupt source"
-	# Decompress source
-	if [ "$(echo ${src##*.})" == "tgz" ]; then
-		tar -x -f $src
-	elif [ "$(echo ${src##*.})" == "zip" ]; then
-		unzip -q $src
-	else
-		false	# Unsupported archive format.
-	fi
-	# Copy file source
-	sudo cp -a $(cat ../sources/source_dir)/. "$final_path"
-	# Copy additional file and modified
-	if test -e "../sources/ajouts"; then
-		sudo cp -a ../sources/ajouts/. "$final_path"
-	fi
-}
-
-POOL_FPM () {	# Create the php-fpm pool configuration file and configure it.
-	sed -i "s@__NAMETOCHANGE__@$app@g" ../conf/php-fpm.conf
-	sed -i "s@__FINALPATH__@$final_path@g" ../conf/php-fpm.conf
-	finalphpconf=/etc/php5/fpm/pool.d/$app.conf
-	sudo cp ../conf/php-fpm.conf $finalphpconf
-	sudo chown root: $finalphpconf
-	finalphpini=/etc/php5/fpm/conf.d/20-$app.ini
-	sudo cp ../conf/php-fpm.ini $finalphpini
-	sudo chown root: $finalphpini
-	sudo systemctl reload php5-fpm
-}
-
-STORE_MD5_CONFIG () {	# Saves the checksum of the config file
-	# $1 = Name of the conf file for storage in settings.yml
-	# $2 = Full name and path of the conf file.
-	ynh_app_setting_set $app $1_file_md5 $(sudo md5sum "$2" | cut -d' ' -f1)
-}
-
-CHECK_MD5_CONFIG () {	# Created a backup of the config file if it was changed.
-	# $1 = Name of the conf file for storage in settings.yml
-	# $2 = Full name and path of the conf file.onf.
-	if [ "$(ynh_app_setting_get $app $1_file_md5)" != $(sudo md5sum "$2" | cut -d' ' -f1) ]; then
-		sudo cp -a "$2" "$2.backup.$(date '+%d.%m.%y_%Hh%M,%Ss')"	# Si le fichier de config a été modifié, créer un backup.
-	fi
-}
-
-FIND_PORT () {	# Search free port
-	# $1 = Port number to start the search.
-	port=$1
-	while ! sudo yunohost app checkport $port ; do
-		port=$((port+1))
-	done
-	CHECK_VAR "$port" "port empty"
-}
-
-
-### REMOVE SCRIPT
-
-REMOVE_NGINX_CONF () {	# Delete nginx configuration
-	if [ -e "/etc/nginx/conf.d/$domain.d/$app.conf" ]; then
-		echo "Delete nginx config"
-		sudo rm "/etc/nginx/conf.d/$domain.d/$app.conf"
-		sudo systemctl reload nginx
-	fi
-}
-
-REMOVE_FPM_CONF () {	# Delete pool php-fpm configuration
-	if [ -e "/etc/php5/fpm/pool.d/$app.conf" ]; then	# Delete fpm config
-		echo "Delete fpm config"
-		sudo rm "/etc/php5/fpm/pool.d/$app.conf"
-	fi
-	if [ -e "/etc/php5/fpm/conf.d/20-$app.ini" ]; then	# Delete php config
-		echo "Delete php config"
-		sudo rm "/etc/php5/fpm/conf.d/20-$app.ini"
-	fi
-	sudo systemctl reload php5-fpm
-}
-
-REMOVE_LOGROTATE_CONF () {	# Delete logrotate configuration
-	if [ -e "/etc/logrotate.d/$app" ]; then
-		echo "Delete logrotate config"
-		sudo rm "/etc/logrotate.d/$app"
-	fi
-}
-
-SECURE_REMOVE () {      # Deleting a folder with variable verification
-	chaine="$1"	# The argument must be given between simple quotes '', to avoid interpreting the variables.
-	no_var=0
-	while (echo "$chaine" | grep -q '\$')	# Loop as long as there are $ in the string
-	do
-		no_var=1
-		global_var=$(echo "$chaine" | cut -d '$' -f 2)	# Isole the first variable found.
-		only_var=\$$(expr "$global_var" : '\([A-Za-z0-9_]*\)')	# Isole completely the variable by adding the $ at the beginning and keeping only the name of the variable. Mostly gets rid of / and a possible path behind.
-		real_var=$(eval "echo ${only_var}")		# `eval "echo ${var}` Allows to interpret a variable contained in a variable.
-		if test -z "$real_var" || [ "$real_var" = "/" ]; then
-			echo "Variable $only_var is empty, suppression of $chaine cancelled." >&2
-			return 1
-		fi
-		chaine=$(echo "$chaine" | sed "s@$only_var@$real_var@")	# Replaces variable with its value in the string.
-	done
-	if [ "$no_var" -eq 1 ]
-	then
-		if [ -e "$chaine" ]; then
-			echo "Delete directory $chaine"
-			sudo rm -r "$chaine"
-		fi
-		return 0
-	else
-		echo "No detected variable." >&2
-		return 1
-	fi
-}
\ No newline at end of file
diff --git a/scripts/_common.sh b/scripts/_common.sh
new file mode 100644
index 0000000..0f53f77
--- /dev/null
+++ b/scripts/_common.sh
@@ -0,0 +1,112 @@
+#!/bin/bash
+
+# =============================================================================
+#                     YUNOHOST 2.7 FORTHCOMING HELPERS
+# =============================================================================
+
+# Create a dedicated nginx config
+#
+# usage: ynh_add_nginx_config
+ynh_add_nginx_config () {
+	finalnginxconf="/etc/nginx/conf.d/$domain.d/$app.conf"
+	ynh_backup_if_checksum_is_different "$finalnginxconf"
+	sudo cp ../conf/nginx.conf "$finalnginxconf"
+
+	# To avoid a break by set -u, use a void substitution ${var:-}. If the variable is not set, it's simply set with an empty variable.
+	# Substitute in a nginx config file only if the variable is not empty
+	if test -n "${path_url:-}"; then
+		ynh_replace_string "__PATH__" "$path_url" "$finalnginxconf"
+	fi
+	if test -n "${domain:-}"; then
+		ynh_replace_string "__DOMAIN__" "$domain" "$finalnginxconf"
+	fi
+	if test -n "${port:-}"; then
+		ynh_replace_string "__PORT__" "$port" "$finalnginxconf"
+	fi
+	if test -n "${app:-}"; then
+		ynh_replace_string "__NAME__" "$app" "$finalnginxconf"
+	fi
+	if test -n "${final_path:-}"; then
+		ynh_replace_string "__FINALPATH__" "$final_path" "$finalnginxconf"
+	fi
+	ynh_store_file_checksum "$finalnginxconf"
+
+	sudo systemctl reload nginx
+}
+
+# Remove the dedicated nginx config
+#
+# usage: ynh_remove_nginx_config
+ynh_remove_nginx_config () {
+	ynh_secure_remove "/etc/nginx/conf.d/$domain.d/$app.conf"
+	sudo systemctl reload nginx
+}
+
+# Create a dedicated php-fpm config
+#
+# usage: ynh_add_fpm_config
+ynh_add_fpm_config () {
+	finalphpconf="/etc/php5/fpm/pool.d/$app.conf"
+	ynh_backup_if_checksum_is_different "$finalphpconf"
+	sudo cp ../conf/php-fpm.conf "$finalphpconf"
+	ynh_replace_string "__NAMETOCHANGE__" "$app" "$finalphpconf"
+	ynh_replace_string "__FINALPATH__" "$final_path" "$finalphpconf"
+	ynh_replace_string "__USER__" "$app" "$finalphpconf"
+	sudo chown root: "$finalphpconf"
+	ynh_store_file_checksum "$finalphpconf"
+
+	if [ -e "../conf/php-fpm.ini" ]
+	then
+		finalphpini="/etc/php5/fpm/conf.d/20-$app.ini"
+		ynh_backup_if_checksum_is_different "$finalphpini"
+		sudo cp ../conf/php-fpm.ini "$finalphpini"
+		sudo chown root: "$finalphpini"
+		ynh_store_file_checksum "$finalphpini"
+	fi
+
+	sudo systemctl reload php5-fpm
+}
+
+# Remove the dedicated php-fpm config
+#
+# usage: ynh_remove_fpm_config
+ynh_remove_fpm_config () {
+	ynh_secure_remove "/etc/php5/fpm/pool.d/$app.conf"
+	ynh_secure_remove "/etc/php5/fpm/conf.d/20-$app.ini" 2>&1
+	sudo systemctl reload php5-fpm
+}
+
+# Create a dedicated systemd config
+#
+# usage: ynh_add_systemd_config
+ynh_add_systemd_config () {
+	finalsystemdconf="/etc/systemd/system/$app.service"
+	ynh_backup_if_checksum_is_different "$finalsystemdconf"
+	sudo cp ../conf/systemd.service "$finalsystemdconf"
+
+	# To avoid a break by set -u, use a void substitution ${var:-}. If the variable is not set, it's simply set with an empty variable.
+	# Substitute in a nginx config file only if the variable is not empty
+	if test -n "${final_path:-}"; then
+		ynh_replace_string "__FINALPATH__" "$final_path" "$finalsystemdconf"
+	fi
+	if test -n "${app:-}"; then
+		ynh_replace_string "__APP__" "$app" "$finalsystemdconf"
+	fi
+	ynh_store_file_checksum "$finalsystemdconf"
+
+	sudo chown root: "$finalsystemdconf"
+	sudo systemctl enable $app
+	sudo systemctl daemon-reload
+}
+
+# Remove the dedicated systemd config
+#
+# usage: ynh_remove_systemd_config
+ynh_remove_systemd_config () {
+	finalsystemdconf="/etc/systemd/system/$app.service"
+	if [ -e "$finalsystemdconf" ]; then
+		sudo systemctl stop $app
+		sudo systemctl disable $app
+		ynh_secure_remove "$finalsystemdconf"
+	fi
+}
diff --git a/scripts/install b/scripts/install
index d9c75e8..eba3946 100755
--- a/scripts/install
+++ b/scripts/install
@@ -1,50 +1,56 @@
 #!/bin/bash
 
-# Exit on command errors and treat unset variables as an error
-set -eu
+#=================================================
+# GENERIC START
+#=================================================
+# IMPORT GENERIC HELPERS
+#=================================================
 
-# This is a multi-instance app, meaning it can be installed several times independently
-# The id of the app as stated in the manifest is available as $YNH_APP_ID
-# The instance number is available as $YNH_APP_INSTANCE_NUMBER (equals "1", "2", ...)
-# The app instance name is available as $YNH_APP_INSTANCE_NAME
-#    - the first time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample
-#    - the second time the app is installed, YNH_APP_INSTANCE_NAME = ynhexample__2
-#    - ynhexample__{N} for the subsequent installations, with N=3,4, ...
-# The app instance name is probably what you are interested the most, since this is
-# guaranteed to be unique. This is a good unique identifier to define installation path,
-# db names, ...
-
-source .fonctions # Loads the generic functions usually used in the script
-
-# Source YunoHost helpers
+source _common.sh
 source /usr/share/yunohost/helpers
 
-TRAP_ON # Active trap for strop script if detect error
+#=================================================
+# MANAGE SCRIPT FAILURE
+#=================================================
+
+# Exit if an error occurs during the execution of the script
+ynh_abort_if_errors
+
+#=================================================
+# RETRIEVE ARGUMENTS FROM THE MANIFEST
+#=================================================
 
 app=$YNH_APP_INSTANCE_NAME
 
 # Retrieve arguments
 domain=$YNH_APP_ARG_DOMAIN
-path=$YNH_APP_ARG_PATH
+path_url=$YNH_APP_ARG_PATH
 is_public=$YNH_APP_ARG_IS_PUBLIC
 admin_username=$YNH_APP_ARG_USERNAME
 admin_name=$YNH_APP_ARG_NAME
 admin_email=$YNH_APP_ARG_EMAIL
 admin_password=$(openssl passwd -1 -salt xyz $YNH_APP_ARG_PASSWORD)
+path
+#=================================================
+# CHECK IF THE APP CAN BE INSTALLED WITH THESE ARGS
+#=================================================
 
-CHECK_VAR "$app" "app name not set"
+# Normalize the url path syntax
+path_url=$(ynh_normalize_url_path $path_url)
 
-CHECK_PATH
+# Check web path availability
+ynh_webpath_available $domain $path_url
+# Register (book) web path
+ynh_webpath_register $app $domain $path_url
 
-CHECK_DOMAINPATH
-
-CHECK_FINALPATH
+final_path=/var/www/$app
+test ! -e "$final_path" || ynh_die "This path already contains a folder"
 
 
 # Save app settings
 ynh_app_setting_set "$app" is_public "$is_public"
 ynh_app_setting_set $app domain $domain
-ynh_app_setting_set $app path $path
+ynh_app_setting_set $app path $path_url
 
 
 # Check password strength
@@ -52,31 +58,32 @@ ynh_app_setting_set $app path $path
 "The password is too weak, it must be longer than 6 characters"
 
 
-# Copy files to the right place
-sudo mkdir "$final_path"
-ynh_app_setting_set $app final_path $final_path
-# Get source
-SETUP_SOURCE
+#=================================================
+# DOWNLOAD, CHECK AND UNPACK SOURCE
+#=================================================
 
+ynh_app_setting_set $app final_path $final_path
+# Download, check integrity, uncompress and patch the source from app.src
+ynh_setup_source "$final_path"
 # Set permissions to app files
 # you may need to make some file and/or directory writeable by www-data (nginx user)
 sudo chown -R root: $final_path
 
-### MySQL (can be removed if not used) ###
-# If your app use a MySQL database you can use these lines to bootstrap
-# a database, an associated user and save the password in app settings.
-#
-# # Generate MySQL password and create database
- dbuser=$app
- dbname=$app
- dbpass=$(ynh_string_random 12)
- ynh_app_setting_set "$app" mysqlpwd "$dbpass"
- ynh_mysql_create_db "$dbname" "$dbuser" "$dbpass"
+
+#=================================================
+# CREATE A MYSQL DATABASE
+#=================================================
+# If your app uses a MySQL database, you can use these lines to bootstrap
+# a database, an associated user and save the password in app settings
+
+db_name=$(ynh_sanitize_dbid $app)
+ynh_app_setting_set $app db_name $db_name
+ynh_mysql_setup_db $db_name $db_name
 
 # Adding the details of the database to the config file
-sed -i "s@__dbuser__@$dbuser@g" ../conf/config.ini.php
-sed -i "s@__dbpass__@$dbpass@g" ../conf/config.ini.php
-sed -i "s@__dbname__@$dbname@g" ../conf/config.ini.php
+sed -i "s@__dbuser__@$db_name@g" ../conf/config.ini.php
+sed -i "s@__dbpass__@$db_pwd@g" ../conf/config.ini.php
+sed -i "s@__dbname__@$db_name@g" ../conf/config.ini.php
 
 # Copy the config file to the final path
 sudo cp ../conf/config.ini.php $final_path/data/.
@@ -84,8 +91,7 @@ sudo cp ../conf/config.ini.php $final_path/data/.
 
 
 # # Load initial SQL into the new database
- ynh_mysql_connect_as "$dbuser" "$dbpass" "$dbname" \
-     < "../conf/sql/webtrees.sql"
+ynh_mysql_connect_as "$db_name" "$db_pwd" "$db_name" < "../conf/sql/webtrees.sql"
 
 
 
@@ -95,18 +101,13 @@ ynh_replace_string "__NAME__" "$admin_name" ../conf/sql/admin.sql
 ynh_replace_string "__USER_EMAIL__" "$admin_email" ../conf/sql/admin.sql
 ynh_replace_string "__PASSWORD__" "$admin_password" ../conf/sql/admin.sql
 
-ynh_mysql_connect_as "$dbuser" "$dbpass" "$dbname" < "../conf/sql/admin.sql"
+ynh_mysql_connect_as "$db_name" "$db_pwd" "$db_name" < "../conf/sql/admin.sql"
 
 ### MySQL end ###
 
-# Modify Nginx configuration file and copy it to Nginx conf directory
-nginx_conf=../conf/nginx.conf
-sed -i "s@YNH_WWW_PATH@$path@g" $nginx_conf
-sed -i "s@YNH_WWW_ALIAS@$final_path/@g" $nginx_conf
-# If a dedicated php-fpm process is used:
-# Don't forget to modify ../conf/nginx.conf accordingly or your app will not work!
-# sed -i "s@YNH_WWW_APP@$app@g" $nginx_conf
-sudo cp $nginx_conf /etc/nginx/conf.d/$domain.d/$app.conf
+# Create a dedicated nginx config
+ynh_add_nginx_config
+
 
 
 # If app is public, add url to SSOWat conf as skipped_uris
diff --git a/scripts/remove b/scripts/remove
index b5edcbb..5f0bba9 100755
--- a/scripts/remove
+++ b/scripts/remove
@@ -1,23 +1,34 @@
 #!/bin/bash
 
-# Exit on command errors and treat unset variables as an error
-set -u
+#=================================================
+# GENERIC START
+#=================================================
+# IMPORT GENERIC HELPERS
+#=================================================
 
-# See comments in install script
-app=$YNH_APP_INSTANCE_NAME
-
-
-# Source YunoHost helpers
+source _common.sh
 source /usr/share/yunohost/helpers
 
+#=================================================
+# LOAD SETTINGS
+#=================================================
+app=$YNH_APP_INSTANCE_NAME
+
 # Retrieve app settings
 domain=$(ynh_app_setting_get "$app" domain)
+db_name=$(ynh_app_setting_get $app db_name)
 
-# Remove sources
-sudo rm -rf /var/www/$app
 
-# Remove nginx configuration file
-[[ -n $domain ]] && sudo rm -f "/etc/nginx/conf.d/${domain}.d/${app}.conf"
+# Remove the app directory securely
+ynh_secure_remove "/var/www/$app"
+
+#=================================================
+# REMOVE NGINX CONFIGURATION
+#=================================================
+
+# Remove the dedicated nginx config
+ynh_remove_nginx_config
+
 
 ### PHP (remove if not used) ###
 # If a dedicated php-fpm process is used:
@@ -25,15 +36,5 @@ sudo rm -rf /var/www/$app
 # sudo service php5-fpm reload
 ### PHP end ###
 
-### MySQL (remove if not used) ###
-# If a MySQL database is used:
-# # Drop MySQL database and user
-dbname=$app
-dbuser=$app
-ynh_mysql_drop_db "$dbname" || true
-ynh_mysql_drop_user "$dbuser" || true
-### MySQL end ###
-
-# Reload nginx service
-sudo service nginx reload
-echo -e "\e[0m"	# Restore normal color
+# Remove a database if it exists, along with the associated user
+ynh_mysql_remove_db $db_name $db_name
diff --git a/sources/source_dir b/sources/source_dir
deleted file mode 100644
index 0ab4711..0000000
--- a/sources/source_dir
+++ /dev/null
@@ -1 +0,0 @@
-webtrees
diff --git a/sources/source_md5 b/sources/source_md5
deleted file mode 100644
index 9079bbb..0000000
--- a/sources/source_md5
+++ /dev/null
@@ -1 +0,0 @@
-0f51ab5af9414b981ade19b582a7dd06 webtrees-1.7.9.zip
diff --git a/sources/source_url b/sources/source_url
deleted file mode 100644
index 0cf9828..0000000
--- a/sources/source_url
+++ /dev/null
@@ -1 +0,0 @@
-https://launchpad.net/webtrees/1.7/1.7.9/+download/webtrees-1.7.9.zip