Spinal

A couple of tools for copying files and directories.

2016 12 06
- Fixed bug where dry runs would still create directories
2016 11 27
- Renamed the copy_file parameter callback to callback_progress for clarity.
2016 03 02
- Fixed issue where the copy's path casing was based on the input string and not the path's actual casing (since Windows doesn't care).
- Change the returned written_bytes to 0 if the file did not need to be copied. This is better for tracking how much actually happens during each backup.
- Fixed encode errors caused by callback_v1's print statement.
2016 03 03
- Moved directory / filename exclusion logic into the walk_generator so the caller doesn't need to worry about it.
- walk_generator now yields absolute filenames since copy_dir no longer needs to process exclusions, and that was the only reason walk_generator used to yield them in parts.
2016 03 04
- Created a FilePath class to cache os.stat data, which should reduce the number of unecessary filesystem calls.
2016 03 18
- Added glob.escape to get_path_casing.
- Added callbacks for some extra debug output.