RFR: 8343196: Add build property to identify experimental builds of JavaFX [v2]

[Kevin Rushforth]

On Sat, 16 Nov 2024 15:37:22 GMT, Johan Vos <jvos at openjdk.org> wrote:

> I might be confused, but wasn't the idea to use a new property (e.g. jfx.feature.variant) instead of overloading the existing jfx.release.suffix?

This PR does add a new property in `build.properties`,`jfx.experimental.release.suffix`, and does not require modifying `jfx.release.suffix`. For example, in the "metal" branch of the jfx-sandbox, we would define this as:


jfx.experimental.release.suffix=-metal

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PR Comment: https://git.openjdk.org/jfx/pull/1637#issuecomment-2480636641