add experimental helpers send mail

scripts/_common.sh

@@ -20,7 +20,54 @@ pkg_dependencies="$php_dependencies"
 #=================================================
 # EXPERIMENTAL HELPERS
 #=================================================
+ynh_send_readme_to_admin() {
+	local app_message="${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"
+}
 #=================================================
 # FUTURE OFFICIAL HELPERS
 #=================================================