feat(core): a tool to analyse the difference in disk usage between 2 directories

Description

Sometimes we want to know for our external dependencies (or installation programs) where disk usage has increased/decreased between two versions.

Functional specifications

du_diff.py --help 
usage: du_diff.py [-h] [--dir1 dir1] [--dir2 dir2] [--files]
                  [--ignore-size ignore-size]

Analyse the difference in disk usage between the two given directories. By default, it will compare the contents of two directories recursively.

options:
  -h, --help            show this help message and exit
  --dir1 dir1           First directory to compare (the new directory).
  --dir2 dir2           Second directory to compare (the previous directory).
  --files               Report only diff at directory level
  --ignore-size ignore-size
                        Ignore diff less than given MB

Example: du_diff.py --dir1=dir1 --dir2=dir2 [--files] [--ignore-size=1]

Technical specifications

A simple python script traversing the two directories to collect size informations to be analyse afterwards.