fix incorrect path to trusted root dir

[RasmusN]

It's not possible to run the example app in development mode (not frozen):

INFO:__main__:my_app 1.8
Traceback (most recent call last):
  File "c:\Projects\tufup-example_aws\src\main.py", line 13, in <module>      
    main(sys.argv[1:])
  File "C:\Projects\tufup-example_aws\src\myapp\__init__.py", line 64, in main
    shutil.copy(src=settings.TRUSTED_ROOT_SRC, dst=settings.TRUSTED_ROOT_DST) 
  File "C:\Python311\Lib\shutil.py", line 419, in copy
    copyfile(src, dst, follow_symlinks=follow_symlinks)
  File "C:\Python311\Lib\shutil.py", line 256, in copyfile
    with open(src, 'rb') as fsrc:
         ^^^^^^^^^^^^^^^
FileNotFoundError: [Errno 2] No such file or directory: 'C:\\Projects\\tufup-example_aws\\repo\\deploy\\metadata\\root.json'

The TRUSTED_ROOT_SRC did not point to the path specified by repo_settings.py

[RasmusN]

The problem with that is that main.py doesn't know about the python files in the project root folder. It will have to be something like

if not FROZEN:
    # for development, get the root metadata directly from local repo
    sys.path.insert(0, str(MODULE_DIR.parent.parent))
    from repo_settings import REPO_DIR
    TRUSTED_ROOT_SRC =  REPO_DIR / 'metadata' / 'root.json' 

It is of course possible add the project root folder to your python path but I'm thinking it would be nice if it was working right out of the box without any customizations.

[dennisvang]

@RasmusN True, but, I believe that's not an issue if you run main.py from the project root, using the module (-m) switch:

python -m src.main

From the docs:

[...] As with the -c option, the current directory will be added to the start of sys.path.

[RasmusN]

Hmm... then I get this

$ python -m src.main
Traceback (most recent call last):
  File "<frozen runpy>", line 198, in _run_module_as_main
  File "<frozen runpy>", line 88, in _run_code
  File "C:\Projects\tufup-example\src\main.py", line 4, in <module>
    from myapp import main, settings
ModuleNotFoundError: No module named 'myapp'

[dennisvang]

@RasmusN Sorry about that: you are absolutely right. Using -m would require imports from src.myapp or relative imports, which, in turn, would break down when running frozen.

On second thought, I guess your sys.path solution would do fine, as proposed above.

[RasmusN]

Another thing: In order to be able to run repo_init.py I need to add these two lines:

import sys
sys.path.insert(0, 'src/')

I can add them to the PR if you want