Add automatic version

[rlopezcoto]

Add automatic version loading as in ctapipe and cta-lstchain with the version.py file

[maxnoe]

This is not good!

Importing a module in setup.py that directly imports dependencies makes it impossible for setuptools to install those dependencies. Running pip install will directly fail with an import error.

[rlopezcoto]

Do you refer to the import of ctapipe_io_lst?
it's been working like this for lstchain up to now, but we can modify it, can you work out a suggestion that we can add here and in lstchain?
Thanks!

[maxnoe]

Probably because you installed all dependencies before by hand. But running pip install . now raises import errors for e.g. numpy if in a fresh environment.

The import makes it impossible for setuptools to install the dependencies listed in install_requires before importing the package:

$ pip install .
Processing /home/maxnoe/Uni/CTA/ctapipe_io_lst
    ERROR: Command errored out with exit status 1:
     command: /home/maxnoe/.local/anaconda3/envs/test/bin/python -c 'import sys, setuptools, tokenize; sys.argv[0] = '"'"'/tmp/pip-req-build-k1ljh_jn/setup.py'"'"'; __file__='"'"'/tmp/pip-req-build-k1ljh_jn/setup.py'"'"';f=getattr(tokenize, '"'"'open'"'"', open)(__file__);code=f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' egg_info --egg-base /tmp/pip-req-build-k1ljh_jn/pip-egg-info
         cwd: /tmp/pip-req-build-k1ljh_jn/
    Complete output (7 lines):
    Traceback (most recent call last):
      File "<string>", line 1, in <module>
      File "/tmp/pip-req-build-k1ljh_jn/setup.py", line 3, in <module>
        import ctapipe_io_lst
      File "/tmp/pip-req-build-k1ljh_jn/ctapipe_io_lst/__init__.py", line 7, in <module>
        import numpy as np
    ModuleNotFoundError: No module named 'numpy'
    ----------------------------------------
ERROR: Command errored out with exit status 1: python setup.py egg_info Check the logs for full command output.

This should not happen!

[rlopezcoto]

ok, I see, thanks again for reporting. It would be great if you could work out a solution, but if you cannot make it, I'll give it a try because we need a new release of the repo to read all new data. Are you working on something @maxnoe ?

[maxnoe]

Yes, I'll get back to you.

[maxnoe]

See #22