Hi all - I’d like to have a parameter which could ...

# clikt

[Rob Elliot]

Hi all - I’d like to have a parameter which could either be a URI or a Path, which I’ll then turn into a URI. So accept any of:
file:///tmp/whatever
/tmp/whatever - will resolve to file:///tmp/whatever
foo - will resolve to file:///currentdir/foo
<http://example.com>

Obviously I can do it in a call to convert but I’d quite like to reuse com.github.ajalt.clikt.parameters.types.path - but it can only be called on a RawArgument, and it delegates to an internal function so I can’t call that.

[Rob Elliot]

I was hoping there might be a way to recover from a previous conversion failure in the DSL, but I haven’t spotted it yet - may just be failing to read carefully enough though.

[AJ Alt]

No, there's no way to convert failed conversion into another type. I'm not sure that'd even be possible to express in the type system. You can reuse conversions e.g. option().path().convert {it.toURI()}, but that's only for successful cases. The path validation is pretty simple, I'd suggest just copying the parts you care about into your own convert (https://github.com/ajalt/clikt/blob/a220c2c9173df9dace0c2a87f9bff86b211b6428/clikt/src/jvmMain/kotlin/com/github/ajalt/clikt/parameters/types/path.kt#L37).

[Rob Elliot]

Got you, thanks.