[Buildroot] [PATCH 1/2] utils/scanpypi: add setup.py script directory as sys.path[0]

[Peter Korsgaard]

>>>>> "Thomas" == Thomas De Schampheleire <patrickdepinguin at gmail.com> writes:

 > From: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>
 > Even though the directory containing a package's setup.py was added to
 > sys.path, some setup.py implementations rely on the fact that it is placed
 > in sys.path[0].

 > An example package is 'cram' which failed to be added with scanpypi:

 >     Traceback (most recent call last):
 >       File "utils/scanpypi", line 756, in <module>
 >         main()
 >       File "utils/scanpypi", line 703, in main
 >         package.load_setup()
 >       File "utils/scanpypi", line 303, in load_setup
 >         setup = imp.load_module('setup', s_file, s_path, s_desc)
 >       File "/usr/lib/python3.8/imp.py", line 234, in load_module
 >         return load_source(name, filename, file)
 >       File "/usr/lib/python3.8/imp.py", line 171, in load_source
 >         module = _load(spec)
 >       File "<frozen importlib._bootstrap>", line 702, in _load
 >       File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
 >       File "<frozen importlib._bootstrap_external>", line 783, in exec_module
 >       File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
 >       File "/tmp/scanpypi-2pzc5wb_/python-cram/cram-0.7/setup.py", line 44, in <module>
 >         long_description=long_description(),
 >       File "/tmp/scanpypi-2pzc5wb_/python-cram/cram-0.7/setup.py", line 20, in long_description
 >         return open(os.path.join(sys.path[0], 'README.rst')).read()
 >     FileNotFoundError: [Errno 2] No such file or directory: '.../buildroot/utils/README.rst'

 > The corresponding code from cram's setup.py is:

 >     def long_description():
 >         """Get the long description from the README"""
 >         return open(os.path.join(sys.path[0], 'README.rst')).read()

 > Indeed, the Python documentation says:

 > https://docs.python.org/3.8/library/sys.html#sys.path
 >     "...
 >     As initialized upon program startup, the first item of this list,
 >     path[0], is the directory containing the script that was used to invoke
 >     the Python interpreter.
 >     ..."

 > Fix this by inserting explicitly at index 0 instead of appending to
 > sys.path.

 > Signed-off-by: Thomas De Schampheleire <thomas.de_schampheleire at nokia.com>

Committed to 2021.02.x and 2021.05.x, thanks.

-- 
Bye, Peter Korsgaard