The predefined variables

Some variables are predefined and they can be used into .ffizer.yaml into by example the imports section or default_value via handlebars expression.

variable	value of
`ffizer_dst_folder`	cli arg `--destination` as string
`ffizer_src_rev`	cli arg `--rev` as string (could be null)
`ffizer_src_uri`	cli arg `--source` as string
`ffizer_src_subfolder`	cli arg `--source-subfolder` as string (could be null)
`ffizer_version`	the current version of ffizer as string

The following sample combine a helper function file_name with ffizer_dst_folder.

variables:
  - name: project_name
    default_value: "{{ file_name ffizer_dst_folder }}"