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From "Jarek Potiuk (Jira)" <>
Subject [jira] [Created] (AIRFLOW-5373) Super fast pre-commit check for python2 compatibility (for cherry-picking)
Date Mon, 02 Sep 2019 01:06:00 GMT
Jarek Potiuk created AIRFLOW-5373:

             Summary: Super fast pre-commit check for python2 compatibility (for cherry-picking)
                 Key: AIRFLOW-5373
             Project: Apache Airflow
          Issue Type: Improvement
          Components: ci
    Affects Versions: 1.10.5
            Reporter: Jarek Potiuk

I thought about a super-fast way of protecting against bad python3 cherry-picks in our v1-10-test
branch. From the experience, it looks like we have two types of problems most often:
 # super()
 # python3 type annotations in definition of function parameters/return values
 # python3 type annotations in variables

I tried to find some good "proper" solution to check automatically if the code is python2-compliant
but surprisingly could not find anything fast and good (actually there are plenty of python3
compat checkers and auto-converters but I could not find good verification is some python3
constructs are used in python2 code).

However it came to me that we can likely do a simple grep that should be able to catch vast
majority of those case with very limited (if at all) false positives. It turned out to be
a good idea for 1 and 2 (which is vast majority of cases I think) :

Such simple and straigthforward regexp does the work beautifully:


I managed to find two actual problems - Python3 incompatibilitites in v1-10-test this way
(!!!). In master we have 830 matching lines so I think it's rather good.






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