diff --git a/demo_lxc_build.sh b/demo_lxc_build.sh
index d392ce9..84a2985 100755
--- a/demo_lxc_build.sh
+++ b/demo_lxc_build.sh
@@ -69,7 +69,7 @@ ynh_lxc_run_inside --name="$lxc_name1" --command="yunohost -v" | tee -a "$LOG_BU
 # ********
 ynh_print_info --message="> Modification de Yunohost pour la demo" | tee -a "$LOG_BUILD_LXC" 2>&1
 
-if [ ${FOR_PACKAGE_CHECK:-0} -eq 1 ]; then
+if [ ${DONT_INSTALL_FOR_NOW:-0} -eq 1 ]; then
 # App officielles
 ynh_print_info --message="> Installation des applications officielles" | tee -a "$LOG_BUILD_LXC" 2>&1
 # Ampache
diff --git a/ynh_lxd b/ynh_lxd
new file mode 100644
index 0000000..5e6abe7
--- /dev/null
+++ b/ynh_lxd
@@ -0,0 +1,981 @@
+#!/bin/bash
+
+#=================================================
+# LXC helpers
+#=================================================
+
+# Check if a LXC container exists
+#
+# usage: ynh_lxc_exists --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_exists() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ! lxc list --format json | jq -e --arg name $name '.[] | select(.name==$name) | .name' >/dev/null
+	then
+		return 1
+	else
+		return 0
+	fi
+}
+
+# Return LXC container status
+#
+# usage: ynh_lxc_status --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_status() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ynh_lxc_exists --name=$name
+	then
+		lxc list --format json | jq -r --arg name $name '.[] | select(.name==$name) | .state | .status'
+	fi
+}
+
+# Check if an LXC container is running
+#
+# usage: ynh_lxc_is_started --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_is_started() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if [ "$(ynh_lxc_status --name=$name)" == Running ]
+	then
+		return 0
+	else
+		return 1
+	fi
+}
+
+# Check if an LXC container is stopped
+#
+# usage: ynh_lxc_is_stopped --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_is_stopped() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if [ "$(ynh_lxc_status --name=$name)" == Stopped ]
+	then
+		return 0
+	else
+		return 1
+	fi
+}
+
+# Start an LXC container
+#
+# usage: ynh_lxc_start --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_start() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# If the container exists
+	if ynh_lxc_exists --name=$name
+	then
+		if ! ynh_lxc_is_started --name=$name
+		then
+			lxc start $name
+		fi
+	fi
+}
+
+# Stopping an LXC container
+#
+# usage: ynh_lxc_stop --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_stop() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# If the container exists
+	if ynh_lxc_exists --name=$name
+	then
+		ynh_print_info --message="Stopping LXC $name"
+		wait_period=0
+		while ! ynh_lxc_is_stopped --name=$name
+		do
+			lxc stop $name
+			wait_period=$(($wait_period+10))
+			if [ $wait_period -gt 30 ];then
+				break
+			else
+				sleep 1
+			fi
+		done
+
+		# If the command times out, then add the option --force
+		wait_period=0
+		while ! ynh_lxc_is_stopped --name=$name
+		do
+			lxc stop $name --force
+			wait_period=$(($wait_period+10))
+			if [ $wait_period -gt 30 ];then
+				break
+			else
+				sleep 5
+			fi
+		done
+	fi
+}
+
+# Run a command inside an LXC container
+#
+# usage: ynh_lxc_run_inside --name=name --command=command
+# | arg: -n, --name=		- name of the LXC
+# | arg: -c, --command=		- command to execute
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_run_inside() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=nc
+	local -A args_array=([n]=name= [c]=command=)
+	local name
+	local command
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	lxc exec $name -- /bin/bash -c "$command"
+}
+
+# Check an LXC container can start
+#
+# usage: ynh_lxc_check_container_start --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_check_container_start() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	ynh_print_info --message="Test du conteneur $name"
+	ynh_lxc_start --name=$name	# Démarre le conteneur
+
+	wait_period=0
+	while ! ynh_lxc_is_started --name=$name
+	do
+		wait_period=$(($wait_period+10))
+		if [ $wait_period -gt 20 ];then
+			break
+		else
+			sleep 5
+		fi
+	done
+
+	ynh_lxc_is_started --name=$name
+}
+
+# Restart a container
+#
+# usage: _ynh_restart_container --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+_ynh_restart_container() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	ynh_lxc_stop --name="$name"
+	ynh_lxc_start --name="$name"
+}
+
+# Keep sure the LXC is started
+#
+# usage: _ynh_lxc_start_and_wait --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+_ynh_lxc_start_and_wait() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# Try to start the container 3 times.
+	ynh_lxc_start --name=$name
+	local max_try=3
+	local i=0
+	while [ $i -lt $max_try ]
+	do
+		i=$(( i +1 ))
+		local failstart=0
+
+		# Wait for container to start, we are using systemd to check this,
+		# for the sake of brevity.
+		for j in $(seq 1 10); do
+			if ynh_lxc_run_inside --name=$name --command="systemctl isolate multi-user.target >/dev/null 2>/dev/null"; then
+				break
+			fi
+
+			if [ "$j" == "10" ]; then
+				log_debug 'Failed to start the container ... restarting ...'
+				failstart=1
+
+				_ynh_restart_container --name="$name"
+			fi
+
+			sleep 1s
+		done
+
+		# Wait for container to access the internet
+		for j in $(seq 1 10); do
+			if ynh_lxc_run_inside --name=$name --command="curl -s http://wikipedia.org > /dev/null 2>/dev/null"; then
+				break
+			fi
+
+			if [ "$j" == "10" ]; then
+				log_debug 'Failed to access the internet ... restarting'
+				failstart=1
+
+				_ynh_restart_container --name="$name"
+			fi
+
+			sleep 1s
+		done
+
+		# Has started and has access to the internet
+		if [ $failstart -eq 0 ]
+		then
+			break
+		fi
+
+		# Fail if the container failed to start
+		if [ $i -eq $max_try ] && [ $failstart -eq 1 ]
+		then
+			log_error "The container miserably failed to start or to connect to the internet"
+			lxc info --show-log $name
+			return 1
+		fi
+	done
+
+	LXC_IP=$(ynh_lxc_run_inside --name=$name --command="hostname -I | cut -d' ' -f1 | grep -E -o \"\<[0-9.]{8,}\>\"")
+}
+
+# Create a new LXC from an image
+#
+# usage: ynh_lxc_create --image=image --name=name
+# | arg: -i, --image=	- image to create from
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_create(){
+	# Declare an array to define the options of this helper.
+	local legacy_args=in
+	local -A args_array=([i]=image= [n]=name=)
+	local image
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	log_info "Launching new LXC $name ..."
+	# Check if we can launch container from YunoHost remote image
+	if ynh_exec_as $app lxc remote list | grep -q "yunohost" && ynh_exec_as $app lxc image list yunohost:$image | grep -q -w $image; then
+		ynh_exec_as $app lxc launch yunohost:$image $name \
+			-c security.nesting=true \
+			-c security.privileged=true \
+			-c limits.memory=80% \
+			-c limits.cpu.allowance=80%  | tee -a /proc/self/fd/3
+	# Check if we can launch container from a local image
+	elif ynh_exec_as $app lxc image list $image | grep -q -w $image; then
+		ynh_exec_as $app lxc launch $image $name \
+			-c security.nesting=true \
+			-c security.privileged=true \
+			-c limits.memory=80% \
+			-c limits.cpu.allowance=80%  | tee -a /proc/self/fd/3
+	else
+		log_critical "Can't find base image $image"
+	fi
+	
+	if [ ! -z "$PACKAGE_CHECK_EXEC" ]
+	then
+		pipestatus="${PIPESTATUS[0]}"
+		location=$(ynh_exec_as $app lxc list --format json | jq -e --arg name $name '.[] | select(.name==$name) | .location' | tr -d '"')
+		[[ "$location" != "none" ]] && log_info "... on $location"
+
+		[[ "$pipestatus" -eq 0 ]] || exit 1
+	fi
+
+	_ynh_lxc_start_and_wait --name="$name"
+	if [ ! -z "$PACKAGE_CHECK_EXEC" ]
+	then
+		ynh_lxc_set_witness --name="$name"
+	fi
+	ynh_lxc_create_snapshot --name="$name" --snapname="snap0"
+}
+
+# Delete a lxc container
+#
+# usage: ynh_lxc_delete --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_delete() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ynh_lxc_exists --name=$name
+	then
+		lxc delete $name --force
+	else
+		return 1
+	fi
+}
+
+# Clean the swapfiles of an LXC container
+#
+# usage: ynh_lxc_clean_swapfiles --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_clean_swapfiles() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	_ynh_lxc_start_and_wait --name="$name"
+
+	ynh_lxc_run_inside --name=$name --command='for swapfile in $(ls /swap_* 2>/dev/null); do swapoff $swapfile; done'
+	ynh_lxc_run_inside --name=$name --command='for swapfile in $(ls /swap_* 2>/dev/null); do rm -f $swapfile; done'
+}
+
+# Check if a snapshot exist for an LXC container
+#
+# usage: ynh_lxc_snapshot_exists --name=name --snapname=snapname
+# | arg: -n, --name=		- name of the LXC
+# | arg: -s, --snapname=	- name of the snapshot
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_snapshot_exists() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=ns
+	local -A args_array=([n]=name= [s]=snapname=)
+	local name
+	local snapname
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# If the container exists
+	if ynh_lxc_exists --name=$name
+	then
+		if lxc list --format json | jq -e --arg name $name --arg snapname $snapname '.[] | select(.name==$name) | .snapshots' >/dev/null
+		then
+			if lxc list --format json | jq -e --arg name $name --arg snapname $snapname '.[] | select(.name==$name) | .snapshots[] | select(.name==$snapname)' >/dev/null
+			then
+				return 0
+			else
+				return 1
+			fi
+		else
+			return 1
+		fi
+	fi
+}
+
+# Create a snapshot of an LXC container
+#
+# usage: ynh_lxc_create_snapshot --name=name --snapname=snapname
+# | arg: -n, --name=		- name of the LXC
+# | arg: -s, --snapname=	- name of the snapshot
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_create_snapshot() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=ns
+	local -A args_array=([n]=name= [s]=snapname=)
+	local name
+	local snapname
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	ynh_lxc_start_timer
+	
+	if [ ! -z "$PACKAGE_CHECK_EXEC" ]
+	then
+		# Check all the witness files, to verify if them still here
+		ynh_lxc_check_witness >&2
+	fi
+
+	# Remove swap files to avoid killing the CI with huge snapshots.
+	ynh_lxc_clean_swapfiles --name="$name"
+	
+	ynh_lxc_stop --name="$name"
+
+	# Check if the snapshot already exist
+	if ! ynh_lxc_snapshot_exists --name="$name" --snapname="$snapname"
+	then
+		log_info "(Creating snapshot $snapname ...)"
+		lxc snapshot $name $snapname
+	else
+		log_info "(Recreating snapshot $snapname ...)"
+		lxc snapshot $name $snapname --reuse
+	fi
+
+	_ynh_lxc_start_and_wait --name="$name"
+
+	ynh_lxc_stop_timer 1
+}
+
+# Delete a snapshot of an LXC container
+#
+# usage: ynh_lxc_delete_snapshot --name=name --snapname=snapname
+# | arg: -n, --name=		- name of the LXC
+# | arg: -s, --snapname=	- name of the snapshot
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_delete_snapshot() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=ns
+	local -A args_array=([n]=name= [s]=snapname=)
+	local name
+	local snapname
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ynh_lxc_snapshot_exists --name="$name" --snapname="$snapname"
+	then
+		lxc delete $name/$snapname
+		return 0
+	else
+		return 1
+	fi
+}
+
+# Load a snapshot of an LXC container
+#
+# usage: ynh_lxc_load_snapshot --name=name --snapname=snapname
+# | arg: -n, --name=		- name of the LXC
+# | arg: -s, --snapname=	- name of the snapshot
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_load_snapshot() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=ns
+	local -A args_array=([n]=name= [s]=snapname=)
+	local name
+	local snapname
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ynh_lxc_snapshot_exists --name="$name" --snapname="$snapname"
+	then
+		log_debug "Loading snapshot $snapname ..."
+
+		# Remove swap files before restoring the snapshot.
+		ynh_lxc_clean_swapfiles --name="$name"
+
+		ynh_lxc_stop --name="$name"
+
+		lxc restore $name $snapname
+		_ynh_lxc_start_and_wait --name="$name"
+	else
+		return 1
+	fi
+}
+
+# Restore an LXC container from snap0 snapshot
+#
+# usage: ynh_lxc_restore_from_snapshot --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_restore_from_snapshot () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	ynh_print_info --message="\e[1m> Restauration du snapshot du conteneur $name\e[0m"
+	ynh_lxc_load_snapshot --name=$name --snapname=snap0
+	if ynh_lxc_check_container_start --name=$name
+	then
+		ynh_print_info --message="\e[92m> Conteneur $name en état de marche.\e[0m"
+		return 0
+	else
+		ynh_print_info --message="\e[91m> Conteneur $name en défaut.\e[0m"
+		return 1
+	fi
+}
+
+# Restore an LXC container from an archive
+#
+# usage: ynh_lxc_restore_from_archive --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_restore_from_archive () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ! test -e "/var/lib/lxd/snapshots/$name/snap1.tar.gz"; then
+		ynh_print_info --message="Aucune archive de snapshot pour le conteneur $name"
+		return 1
+	fi
+	ynh_print_info --message="\e[1m> Restauration du snapshot archivé pour le conteneur $name\e[0m"
+	ynh_print_info --message="Suppression du snapshot"
+	ynh_lxc_delete_snapshot --name=$name --snapname=snap0
+	ynh_print_info --message="Décompression de l'archive"
+	tar -x --acls --xattrs -f /var/lib/lxd/snapshots/$name/snap0.tar.gz -C /
+	ynh_lxc_restore_from_snapshot --name=$name
+	return $?
+}
+
+# Clone an LXC container
+#
+# usage: ynh_lxc_clone --source=source --destination=destination
+# | arg: -s, --source=		  - source LXC
+# | arg: -d, --destination=	 - destination LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_clone() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=sd
+	local -A args_array=([s]=source= [d]=destination=)
+	local source
+	local destination
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	ynh_print_info --message="Suppression du conteneur $destination"
+	ynh_secure_remove --file="/var/lib/lxd/snapshots/$destination/snap0.tar.gz"
+	ynh_lxc_reset --name=$destination
+
+	ynh_print_info --message="\e[1m> Clone le conteneur $source sur $destination\e[0m"
+	lxc copy "$source" "$destination"
+
+	ynh_lxc_check_container_start --name=$destination
+	STATUS=$?
+	if [ $STATUS -eq 1 ]; then
+		ynh_print_info --message="\e[91m> Conteneur $destination en défaut.\e[0m"
+	else
+		ynh_print_info --message="\e[92m> Conteneur $destination en état de marche.\e[0m"
+		ynh_print_info --message= "Création d'un nouveau snapshot pour le conteneur $destination"
+		ynh_lxc_create_snapshot --name="$destination" --snapname="snap0"
+	fi
+	return $STATUS
+}
+
+# usage: ynh_lxc_test --name=name -
+ynh_lxc_test(){
+	# Declare an array to define the options of this helper.
+	local legacy_args=ns
+	local -A args_array=([n]=name= [s]=snapname=)
+	local name
+	local snapname
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ynh_lxc_exists --name=$name
+	then
+		ynh_print_info --message="$name exist"
+	else
+		ynh_print_info --message="$name does not exist"
+	fi
+}
+
+# Reset an LXC container
+#
+# usage: ynh_lxc_reset --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_reset() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# If the container exists
+	if ynh_lxc_exists --name=$name
+	then
+		# Remove swap files before deletting the continer
+		ynh_lxc_clean_swapfiles --name="$name"
+		ynh_lxc_stop --name="$name"
+		local current_storage=$(lxc list $name --format json --columns b | jq '.[].expanded_devices.root.pool')
+		swapoff "$(lxc storage get $current_storage source)/containers/$name/rootfs/swap" 2>/dev/null
+		ynh_lxc_delete --name=$name
+	fi 
+}
+
+#=================================================
+# Logging helpers
+#=================================================
+
+readonly NORMAL=$(printf '\033[0m')
+readonly BOLD=$(printf '\033[1m')
+readonly faint=$(printf '\033[2m')
+readonly UNDERLINE=$(printf '\033[4m')
+readonly NEGATIVE=$(printf '\033[7m')
+readonly RED=$(printf '\033[31m')
+readonly GREEN=$(printf '\033[32m')
+readonly ORANGE=$(printf '\033[33m')
+readonly BLUE=$(printf '\033[34m')
+readonly YELLOW=$(printf '\033[93m')
+readonly WHITE=$(printf '\033[39m')
+
+function log_title()
+{
+	cat << EOF | tee -a /proc/self/fd/3
+${BOLD}
+ ============================================
+ $1
+ ============================================
+${NORMAL}
+EOF
+}
+
+function log_small_title()
+{
+	echo -e "\n${BOLD} > ${1}${NORMAL}\n" | tee -a /proc/self/fd/3
+}
+
+
+function log_debug()
+{
+	echo "$1" | tee -a /proc/self/fd/3
+}
+
+function log_info()
+{
+	echo "${1}" | tee -a /proc/self/fd/3
+}
+
+function log_success()
+{
+	echo "${BOLD}${GREEN}Success: ${1}${NORMAL}" | tee -a /proc/self/fd/3
+}
+
+function log_warning()
+{
+	echo "${BOLD}${ORANGE}Warning: ${1}${NORMAL}" | tee -a /proc/self/fd/3
+}
+
+function log_error()
+{
+	echo "${BOLD}${RED}Error: ${1}${NORMAL}" | tee -a /proc/self/fd/3
+}
+
+function log_critical()
+{
+	echo "${BOLD}${RED}Critical: ${1}${NORMAL}" | tee -a /proc/self/fd/3
+	exit 1
+}
+
+function log_report_test_success () {
+	echo -e "\n${BOLD}${GREEN}--- SUCCESS ---${NORMAL}\n" | tee -a /proc/self/fd/3
+}
+
+function log_report_test_warning () {
+	echo -e "\n${BOLD}${ORANGE}--- WARNING ---${NORMAL}\n" | tee -a /proc/self/fd/3
+}
+
+function log_report_test_failed () {
+	echo -e "\n${BOLD}${RED}--- FAIL ---${NORMAL}\n" | tee -a /proc/self/fd/3
+}
+
+#=================================================
+# Timing helpers
+#=================================================
+
+# Start a timer
+#
+# usage: ynh_lxc_start_timer
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_start_timer() {
+	# Set the beginning of the timer
+	starttime=$(date +%s)
+}
+
+# Stop a timer
+#
+# usage: ynh_lxc_stop_timer
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_stop_timer() {
+	# Ending the timer
+	# $1 = Type of querying
+
+	local finishtime=$(date +%s)
+	# Calculate the gap between the starting and the ending of the timer
+	local elapsedtime=$(echo $(( $finishtime - $starttime )))
+	# Extract the number of hour
+	local hours=$(echo $(( $elapsedtime / 3600 )))
+	local elapsedtime=$(echo $(( $elapsedtime - ( 3600 * $hours) )))
+	# Minutes
+	local minutes=$(echo $(( $elapsedtime / 60 )))
+	# And seconds
+	local seconds=$(echo $(( $elapsedtime - ( 60 * $minutes) )))
+
+	local phours=""
+	local pminutes=""
+	local pseconds=""
+
+	# Avoid null values
+	[ $hours -eq 0 ] || phours="$hours hour"
+	[ $minutes -eq 0 ] || pminutes="$minutes minute"
+	[ $seconds -eq 0 ] || pseconds="$seconds second"
+
+	# Add a 's' for plural values
+	[ $hours -eq 1 ] && phours="${phours}, " || test -z "$phours" || phours="${phours}s, "
+	[ $minutes -eq 1 ] && pminutes="${pminutes}, " || test -z "$pminutes" || pminutes="${pminutes}s, "
+	[ $seconds -gt 1 ] && pseconds="${pseconds}s" || pseconds="0s"
+
+	local time="${phours}${pminutes}${pseconds} ($(date '+%T'))"
+	if [ $1 -eq 2 ]; then
+		log_info "Working time for this test: $time"
+	elif [ $1 -eq 3 ]; then
+		log_info "Global working time for all tests: $time"
+	else
+		log_debug "Working time: $time"
+	fi
+}
+
+#=================================================
+# PACKAGE_CHECK helpers
+#=================================================
+
+# Start an LXC and execute a command in it, to be used for PACKAGE_CHECK_EXEC
+#
+# usage: ynh_lxc_exec --name=name --command=command
+# | arg: -n, --name=		- name of the LXC
+# | arg: -c, --command=		- command to execute
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_exec() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=nc
+	local -A args_array=([n]=name= [c]=command=)
+	local name
+	local command
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	_ynh_lxc_start_and_wait --name="$name"
+
+	ynh_lxc_start_timer
+
+	# Execute the command given in argument in the container and log its results.
+	lxc exec $name --env PACKAGE_CHECK_EXEC=1 -t -- /bin/bash -c "$command"
+
+	# Store the return code of the command
+	local returncode=${PIPESTATUS[0]}
+
+	log_debug "Return code: $returncode"
+
+	ynh_lxc_stop_timer 1
+	# Return the exit code of the ssh command
+	return $returncode
+}
+
+# Create a witness in an LXC container
+#
+# usage: ynh_lxc_create_witness --name=name --witness=witness --type=type
+# | arg: -n, --name=		- name of the LXC
+# | arg: -w, --witness=		- witness to create
+# | arg: -t, --type=		- type of witness, can be file or directory
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_create_witness () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=nwt
+	local -A args_array=([n]=name= [w]=witness= [t]=type=)
+	local name
+	local witness
+	local type
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	[ "$type" = "file" ] && local action="touch" || local action="mkdir -p"
+	ynh_lxc_run_inside --name=$name --command="$action $witness"
+}
+
+# Set witness in an LXC container
+#
+# usage: ynh_lxc_set_witness --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_set_witness() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# Create files to check if the remove script does not remove them accidentally
+	log_debug "Create witness files..."
+
+	# Nginx conf
+	ynh_lxc_create_witness -name=$name --witness="/etc/nginx/conf.d/$DOMAIN.d/witnessfile.conf" --type=file
+	ynh_lxc_create_witness -name=$name --witness="/etc/nginx/conf.d/$SUBDOMAIN.d/witnessfile.conf" --type=file
+
+	# /etc
+	ynh_lxc_create_witness -name=$name --witness="/etc/witnessfile" --type=file
+
+	# /opt directory
+	ynh_lxc_create_witness -name=$name --witness="/opt/witnessdir" --type=directory
+
+	# /var/www directory
+	ynh_lxc_create_witness -name=$name --witness="/var/www/witnessdir" --type=directory
+
+	# /home/yunohost.app/
+	ynh_lxc_create_witness -name=$name --witness="/home/yunohost.app/witnessdir" --type=directory
+
+	# /var/log
+	ynh_lxc_create_witness -name=$name --witness="/var/log/witnessfile" --type=file
+
+	# Config fpm
+	ynh_lxc_create_witness -name=$name --witness="/etc/php/$DEFAULT_PHP_VERSION/fpm/pool.d/witnessfile.conf" --type=file
+
+	# Config logrotate
+	ynh_lxc_create_witness -name=$name --witness="/etc/logrotate.d/witnessfile" --type=file
+
+	# Config systemd
+	ynh_lxc_create_witness -name=$name --witness="/etc/systemd/system/witnessfile.service" --type=file
+
+	# Database
+	ynh_lxc_run_inside --name=$name --command="mysqladmin --wait status > /dev/null 2>&1"
+	ynh_lxc_run_inside --name=$name --command="echo \"CREATE DATABASE witnessdb\" | mysql --wait > /dev/null 2>&1"
+}
+
+# Check if a witness exists in an LXC container
+#
+# usage: ynh_lxc_create_witness --name=name --witness=witness
+# | arg: -n, --name=		- name of the LXC
+# | arg: -w, --witness=		- witness to create
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_check_witness_exist () {
+	# Declare an array to define the options of this helper.
+	local legacy_args=nw
+	local -A args_array=([n]=name= [w]=witness=)
+	local name
+	local witness
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	if ynh_lxc_run_inside --name=$name --command="test ! -e \"$witness\""
+	then
+		log_error "The file $witness is missing ! Something gone wrong !"
+		SET_RESULT "failure" witness
+	fi
+}
+	
+# Check witness in an LXC container
+#
+# usage: ynh_lxc_check_witness --name=name
+# | arg: -n, --name=	- name of the LXC
+#
+# Requires YunoHost version *.*.* or higher.
+ynh_lxc_check_witness() {
+	# Declare an array to define the options of this helper.
+	local legacy_args=n
+	local -A args_array=([n]=name=)
+	local name
+	# Manage arguments with getopts
+	ynh_handle_getopts_args "$@"
+
+	# Check all the witness files, to verify if them still here
+
+	# Nginx conf
+	ynh_lxc_check_witness_exist --name=$name --witness="/etc/nginx/conf.d/$DOMAIN.d/witnessfile.conf"
+	ynh_lxc_check_witness_exist --name=$name --witness="/etc/nginx/conf.d/$SUBDOMAIN.d/witnessfile.conf"
+
+	# /etc
+	ynh_lxc_check_witness_exist --name=$name --witness="/etc/witnessfile"
+
+	# /opt directory
+	ynh_lxc_check_witness_exist --name=$name --witness="/opt/witnessdir"
+
+	# /var/www directory
+	ynh_lxc_check_witness_exist --name=$name --witness="/var/www/witnessdir"
+
+	# /home/yunohost.app/
+	ynh_lxc_check_witness_exist --name=$name --witness="/home/yunohost.app/witnessdir"
+
+	# /var/log
+	ynh_lxc_check_witness_exist --name=$name --witness="/var/log/witnessfile"
+
+	# Config fpm
+	ynh_lxc_check_witness_exist --name=$name --witness="/etc/php/$DEFAULT_PHP_VERSION/fpm/pool.d/witnessfile.conf"
+
+	# Config logrotate
+	ynh_lxc_check_witness_exist --name=$name --witness="/etc/logrotate.d/witnessfile"
+
+	# Config systemd
+	ynh_lxc_check_witness_exist --name=$name --witness="/etc/systemd/system/witnessfile.service"
+
+	# Database
+	if ! ynh_lxc_run_inside --name=$name --command="mysqlshow witnessdb > /dev/null 2>&1"
+	then
+		log_error "The database witnessdb is missing ! Something gone wrong !"
+		SET_RESULT "failure" witness
+		return 1
+	fi
+}