FUNCTION
 

FUNCTION

1. Delete all sub directories starting with "$_"
2. Copy current dictionary (or directories, just some Ant FileSets that select files) into backup directory with current timestamp. The target subdirectory has the current timestamp ts as in it's name: "$_" ts.
3. Check for previous full backup and compare both directories. Deltas are saved in subdirectory "$_" ts old "_D". Deltas are additions (or changes) and deletions of files.
4. Rename "$_" ts into ts
5. Rename "$_" ts old "_D" into ts old "_D"
6. Rename ts old into "$_" ts old
7. Delete "$_" ts old