Fix main for Python2

[AlexanderWells-diamond]

Fix the main function for Python2. When this is merged a new release should be done.

Note the version import change is not strictly required, it's just a fix for cases when __main__ has been imported by someone else, which caused the import to pick up softioc.py instead of the module itself. This happens using virtualenv with its startup script.

Closes #62
Closes #59

[codecov]

Codecov Report

Merging #63 (5c39790) into master (dfc3971) will decrease coverage by 0.20%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master      #63      +/-   ##
==========================================
- Coverage   85.57%   85.37%   -0.21%     
==========================================
  Files          13       13              
  Lines         832      834       +2     
==========================================
  Hits          712      712              
- Misses        120      122       +2     

Impacted Files	Coverage Δ
softioc/__main__.py	0.00% <0.00%> (ø)

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[thomascobb]

Please can we also make the script optional, so running pythonSoftIOC launches the executable with no args in a subprocess?

[thomascobb]

That's #59, then the python2 support can be dropped

[AlexanderWells-diamond]

@thomascobb I've committed the fix for #59. Manual testing on the command line indicates it'll now pass everything, to a script. Used below is a simple test.py script that just prints sys.argv:

$ /pythonSoftIOC test.py
['test.py']
$ pythonSoftIOC test.py abc
['test.py', 'abc']
pythonSoftIOC test.py --abc
['test.py', '--abc']
$ pythonSoftIOC -i test.py
['test.py', '-i']
$ pythonSoftIOC -i
Python 3.7.2 (default, Jan 20 2020, 11:03:41) 
[GCC 4.8.5 20150623 (Red Hat 4.8.5-39)] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

[thomascobb]

behaviour looks good, although I can't see the commit that adds this...