Project isolated replacement for findProperty

[mathjeff]

Expected Behavior

It would be nice if there could be a convenient replacement for Project.findProperty(String) that is compatible with project isolation by not checking parent projects and still returns null if the property is not found.

Maybe this could be one method that checks all of the same places as findProperty() (project properties, extensions, conventions, extra properties, tasks) or maybe it could be a separate method for each individual place like ExtraPropertiesExtension.getOrNull()

If that already exists and I just wasn't able to find it, it could be nice to link to it from the documentation of findProperty()

Current Behavior (optional)

No response

Context

AndroidX is addressing more project isolation violations.
It feels a little bit verbose to replace things that look like project.findProperty(STUDIO_TYPE) with things that look like if (project.hasProperty(STUDIO_TYPE)) project.property(STUDIO_TYPE) else null

I tried project.providers.gradleProperty(STUDIO_TYPE).getOrNull() but that returns null because the property was set via project.extensions.extraProperties and I don't seem to be able to do project.extensions.extraProperties.getOrNull(String) either.

Thanks!

[ov7a]

This feature request is in the backlog of the relevant team and is prioritized by them.

[mathjeff]

Also related is #23572 where it can be a little bit tricky to determine an appropriate replacement for findProperty since providers.gradleProperty() (which was what I expected to be the best replacement) doesn't check all of the places I'd expected

[mlopatkin]

This is going to be handled as part of #25179.

[mathjeff]

Cool thanks!

[mathjeff]

Also potentially relevant, what we ended up going with for now was making our own function extraPropertyOrNull:

fun Project.extraPropertyOrNull(key: String): Any? {
    val container = project.extensions.extraProperties
    var result: Any? = null
    if (container.has(key))
        result = container.get(key)
    return result
}

https://r.android.com/c/platform/frameworks/support/+/3047373/11/buildSrc/public/src/main/kotlin/androidx/build/gradle/Extensions.kt#31