Finished backup-to-swappable draft

roles/independent_backup-to-swappable/files/backup-to-swappable.sh

@@ -0,0 +1,35 @@
+#! /bin/sh
+backup_to_swappable_destination_path="$1" &&
+echo "backup to swappable destination path: $backup_to_swappable_destination_path" &&
+
+source_path="$2" &&
+echo "source path: $source_path" || exit 1
+
+if [ ! -d "$backup_to_swappable_destination_path" ]; then
+    echo "Directory $backup_to_swappable_destination_path does not exist" &&
+    exit 1
+fi
+
+machine_id="$(sha256sum /etc/machine-id | head -c 64 )" &&
+echo "machine id: $machine_id" &&
+
+versions_path="$backup_to_swappable_destination_path$machine_id/backup-to-swappable/" &&
+echo "versions path: $versions_path" || exit 1
+
+if [ ! -d "$versions_path" ]; then
+    echo "Creating $versions_path..." &&
+    mkdir -vp $versions_path || exit 1
+fi 
+
+previous_version_path="$(ls -d $versions_path* | tail -1)" &&
+echo "previous versions path: $previous_version_path" &&
+
+current_version_path="$versions_path$(date '+%Y%m%d%H%M%S')" &&
+echo "current versions path: $current_version_path" &&
+
+echo "creating backup destination folder..." &&
+mkdir -vp "$current_version_path" &&
+
+echo "Starting syncronization..."
+rsync -abP --delete --delete-excluded --link-dest="$previous_version_path" "$source_path" "$current_version_path" &&
+echo "Syncronization finished." || exit 1