8000 withPossibleFallback method · Issue #190 · scopt/scopt · GitHub
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withPossibleFallback method #190

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jregistr opened this issue Jun 12, 2018 · 1 comment
Open

withPossibleFallback method #190

jregistr opened this issue Jun 12, 2018 · 1 comment

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@jregistr
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I think it'd be helpful to have a withPossibleFallback method.
The use case is if I want to calculate a fallback but with the option of failing and showing usage information.

ex: I wanted to fallback to using and env variable but also then do some validation on the env.

Perhaps this is currently possible and I just didn't notice how to?
@hussachai
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+1 I have kind of similar use case.
However, if breaking change is ok, I'd prefer having withFallback that takes arg of either Function1[Unit, Option[A]] or Function1[Unit, Try[A]].
Let me know what you guys think. I can create a PR if this is a good change as well.

2m pushed a commit to 2m/scopt that referenced this issue Feb 25, 2020
@Rogach
Merge pull request scopt#190 from Philippus/update/scala-2.13.0-RC3
4d2413f 
Support scala 2.13.0-RC3
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@hussachai @jregistr
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