switching to ynh_detect_arch

scripts/install

@@ -7,6 +7,7 @@
 #=================================================
 
 source _common.sh
+source ynh_detect_arch__2
 source ynh_install_ruby__2
 source ynh_add_swap
 source /usr/share/yunohost/helpers
@@ -40,17 +41,19 @@ app=$YNH_APP_INSTANCE_NAME
 #=================================================
 ynh_script_progression --message="Validating installation parameters..."
 
+architecture=$(ynh_detect_arch)
+# Check machine architecture (in particular, we don't support ARM and 32bit machines)
+if [ $architecture == "arm" ]
+then
+    ynh_die --message="Sorry, but this app can only be installed on a 64 bits machine :("
+fi
+
 final_path=/var/www/$app
 test ! -e "$final_path" || ynh_die --message="This path already contains a folder"
 
 # Register (book) web path
 ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url
 
-if uname -m | grep -q arm
-then
-   ynh_die --message="Unfortunately, this app can not be installed on ARM at the moment. Feel free to open a discussion on https://github.com/YunoHost-Apps/mastodon_ynh/issues to discuss the compatibility. (Additionaly, for small ARM boards you may consider Pleroma as a lighter and more suitable alternative to Mastodon)"
-fi
-
 #=================================================
 # STORE SETTINGS FROM MANIFEST
 #=================================================

scripts/ynh_detect_arch __2

@@ -0,0 +1,25 @@
+#!/bin/bash
+
+# Check the architecture
+#
+# example: architecture=$(ynh_detect_arch)
+#
+# usage: ynh_detect_arch
+#
+# Requires YunoHost version 2.2.4 or higher.
+
+ynh_detect_arch(){
+	local architecture
+	if [ -n "$(uname -m | grep arm64)" ] || [ -n "$(uname -m | grep aarch64)" ]; then
+		architecture="arm64"
+	elif [ -n "$(uname -m | grep 64)" ]; then
+		architecture="x86-64"
+	elif [ -n "$(uname -m | grep 86)" ]; then
+		architecture="i386"
+	elif [ -n "$(uname -m | grep arm)" ]; then
+		architecture="arm"
+	else
+		architecture="unknown"
+	fi
+	echo $architecture
+}