fix: skip date validation when env variable not set

[ReubenJ]

Pull Request

Proposed Changes

Skip date validation when the respective environment variable is set. Currently, omitting the dates causes the action to fail, so it's impossible to output a report that does not include whether a user is a new contributor.

Readiness Checklist

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Reviewer

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[zkoppert]

This is great! Thanks for adding!

I believe we also need to modify contributors.py where it has:

if start_date and end_date:

To have an else statement otherwise contributors will never be properly filled.

[zkoppert]

This is great! Thanks for adding!

I believe we also need to modify contributors.py where it has:

if start_date and end_date:

To have an else statement otherwise contributors will never be properly filled.

Oops! Ok this just isn't true. Contributors is calculated before the conditional so never mind.

[ReubenJ]

Yeah—one more test case for contributors.py probably wouldn't have hurt, but it does work with the fix! Thanks for the quick response.