[enh] Add backup/restore scripts; cleanup.

scripts/backup

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+# causes the shell to exit if any subcommand or pipeline returns a non-zero status
+set -e
+
+# Retrieve arguments
+app="shellinabox"
+domain=$(sudo yunohost app setting $app domain)
+
+# Backup directory location for the app from where the script is executed and 
+# which will be compressed afterward
+backup_dir=$YNH_APP_BACKUP_DIR
+
+# Copy the conf files
+sudo mkdir -p ./conf
+sudo cp -a "/etc/nginx/conf.d/${domain}.d/${app}.conf" ./conf/nginx.conf

scripts/install

@@ -7,10 +7,12 @@ domain=$1
 path=$2
 
 # Check domain/path availability
-sudo yunohost app checkurl $domain$path -a shellinabox
+sudo yunohost app checkurl $domain$path -a shellinabox \
+    || (echo "Path not available: $domain$path" && exit 1)
 
 # Check port availability
-sudo yunohost app checkport 4200
+sudo yunohost app checkport 4200 \
+    || (echo "Port not available: 4200" && exit 1)
 
 # Remove trailing "/" for next commands
 if [[ ! "$path" == "/" ]]; then

scripts/remove

@@ -19,4 +19,5 @@ sudo yunohost service remove shellinabox
 # Remove Nginx proxy configuration
 sudo rm -f /etc/nginx/conf.d/$domain.d/shellinabox.conf
 
+# Restart nginx
 sudo service nginx reload

scripts/restore

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+# causes the shell to exit if any subcommand or pipeline returns a non-zero status
+set -e
+
+# Retrieve arguments
+app="shellinabox"
+domain=$(sudo yunohost app setting $app domain)
+path=$(sudo yunohost app setting $app path)
+
+# Remove trailing slash to path
+path=${path%/}
+
+# Check domain/path availability
+sudo yunohost app checkurl $domain$path -a $app \
+  || (echo "Path not available: $domain$path" && exit 1)
+
+# Check port availability
+sudo yunohost app checkport 4200 \
+    || (echo "Port not available: 4200" && exit 1)
+
+# Check configuration files
+NGINX_CONF="/etc/nginx/conf.d/${domain}.d/${app}.conf"
+[[ -f $NGINX_CONF ]] && die \
+"The NGINX configuration already exists at '${NGINX_CONF}'.
+ You should safely delete it before restoring this app."
+
+# Restore configuration files
+sudo cp -a ./conf/nginx.conf "$NGINX_CONF"
+
+# Reload Nginx and regenerate SSOwat conf
+sudo service nginx reload
+sudo yunohost app ssowatconf