Update install_and_test.md

install_and_test.md

@@ -42,6 +42,18 @@ pip install -e .
 #
 ```
 
+In case you need to work on many modules, you can clone and install all default packages with the [cloneall.bash](cloneall.bash) script:
+
+```bash
+wget https://www.ict.inaf.it/gitlab/hotwheels/gitlab-profile/-/raw/main/cloneall.bash
+./cloneall.bash -cp # will clone and pip-install all hotwheels modules
+```
+
+If you want to create a folder with all the modules soft-linked into the folder `hotwheels/*`, add the flag `-l` to `cloneall.bash` to get this folder tree in a folder named `full/hotwheels/*`. This is helpful in navigating the files with the IDE when development has strong refactoring and one need to edit multiple modules.
+
+If you want to also create a multi-windows tmux session where each panel corresponds to a hotwheels module add the flag `-t` to `cloneall.bash` (will laso include the folder `full` if exists).
+
+You can insert a personalised number of repos by running for instance `cloneall.bash [..] -r core octree` (will only download core and octree module).
 
 
 # Run tests