handle unsupported file operations

[pymonger]

Resolves Duke-GCB/calrissian#123.
More info TBD.

[codecov]

Codecov Report

Merging #1544 (56a4823) into main (ef7cb30) will decrease coverage by 11.58%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##             main    #1544       +/-   ##
===========================================
- Coverage   66.86%   55.28%   -11.59%     
===========================================
  Files          93       47       -46     
  Lines       16622     8353     -8269     
  Branches     4414     2173     -2241     
===========================================
- Hits        11115     4618     -6497     
+ Misses       4366     3180     -1186     
+ Partials     1141      555      -586     

Impacted Files	Coverage Δ
cwltool/cwltool/process.py	69.77% <0.00%> (-1.20%)	⬇️
cwltool/cwltool/job.py	61.68% <0.00%> (-1.16%)	⬇️
cwltool/job.py
cwltool/process.py
cwltool/resolver.py
cwltool/load_tool.py
cwltool/cwlviewer.py
cwltool/main.py
cwltool/provenance_constants.py
cwltool/executors.py
... and 38 more

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[lgtm-com]

This pull request introduces 2 alerts when merging 41b4c6d into f1ae187 - view on LGTM.com

new alerts:

• 2 for Except block handles 'BaseException'

[lgtm-com]

This pull request introduces 2 alerts when merging 56a4823 into ef7cb30 - view on LGTM.com

new alerts:

• 2 for Except block handles 'BaseException'